Cooling of injection molded parts after molding

专利摘要:
An injection molding machine according to the invention comprises a base; a pair of plates carried by the base; the plates support respective mold halves to form a mold and the plates are movable relative to one another in a direction parallel to the machine axis between an open and a closed position of the mold; and a parts handling device for holding and treating parts from the mold; the parts handling device is separated from the mold and comprises, first, an output plate comprising at least one set of first cooling receptacles for receiving and holding a first set of molded articles from the mold; the first heatsinks conduct a first amount of thermal energy conductively away from the first shaped articles; second, a supplemental cooling plate comprising at least one set of second headers for receiving and holding the first set of articles; the second coolers conductively conduct a second amount of thermal energy away from the first molded objects; and third, a transfer housing having at least one housing side, comprising at least one set of transfer pins for receiving and holding the first set of articles; the transfer housing is rotatable to move at least one housing side between a loading position for engagement with the output plate; a supplementary cooling position for engagement with the supplemental cooling plate, and an unloading position for releasing molded articles from the parts handling device.
公开号:AT514631A1
申请号:T9100/2013
申请日:2013-03-12
公开日:2015-02-15
发明作者:
申请人:Athena Automation Ltd；
IPC主号:

专利说明:

COOLING OF INJECTION PARTS AFTER SHAPING 39964
FIELD [0001] The publication relates to injection molding machines and methods and
Devices for cooling injection molded parts after molding.
BACKGROUND) US 4 836 767 (Schad) relates to an apparatus for manufacturing
Injection molded parts, suitable for simultaneously producing and cooling the injection-molded parts. The apparatus comprises a stationary mold half having at least one recess, at least two mating mold parts each having at least one core member mounted on a movable support plate which aligns a first one of the mating mold parts with the stationary mold half and a second one of the mating mold parts positioned a cooling position, a device for cooling the molded injection molded parts in the cooling position, and a device for moving the support plate along a first axis so that the aligned mold rests against the stationary mold half and the second) mating mold part at the same time each plastic part in contact with the cooling device brings. The support plate is also rotatable about an axis parallel to the first axis to allow different ones of the mating mold parts to assume the aligned position during different molding cycles. US 6,299,431 (Neter) describes a rotary cooling station to be used in
Connection with a high-performance injection molding machine and a robot with output plate. A high-speed robot transfers warm preforms to a separate rotatable cooling station, where they are held and internally cooled by special cores. The preforms can also be cooled simultaneously from the outside in order to accelerate the cooling processes and thus avoid the formation of crystalline zones. Solutions for holding and expelling the cooled preforms are described. The rotatable cooling station of the present invention may be used to cool injection molded parts of a single or multiple materials.
US 6,391,244 (Chen) describes an output device for use with a plastic injection molding machine, such as PET preforms. The dispenser has a plurality of cooling hoses that receive hot preforms from the injection molding machine, place them in a position away from the molds of the refrigerator, and then transfer the cooled preforms to a conveyor or other handling equipment. The preforms are held within the cooling hoses by means of negative pressure, but then by air pressure. A retaining plate slightly outside the outer end of the cooling hoses is movable to a closed position in which it temporarily blocks the ejection of the preforms during the application of air pressure, but allows them to be spent slightly axially outside the hoses. Such a small displacement motion is inappropriate for venting the air system to the atmosphere, leaving enough displaced air pressure in the hoses where the preforms would otherwise tend to adhere and resist ejection. After a short delay, the plate is placed in an open position, in which all the procedured preforms are exposed to be pushed out of the sleeves by air pressure. The retaining plate is preferably provided with specially designed bores with passage areas which are aligned with the sleeves when the plate is in its open position, and blocked smaller diameter portions are then aligned with the tubes as the plate is closed Position is located. The smaller diameter blocking regions exceed the diameter of the neck of the preforms, but are smaller in diameter than the flanges of the preforms, such that the surface areas around the blocking regions overlap the flanges to prevent ejection of the preforms as they move.
Published US Patent Application No. 2006/013696 describes a method and apparatus for a second treatment and performs the cooling of the preforms after removal from the open mold halves of an injection molding machine. The preforms are removed from the open molds while still hot through water-cooled cooling sleeves of a sampling device; they are subjected to intensive cooling for the duration of an injection molding cycle. However, the entire inside and the entire outside of the injection-molded part are subjected to intensive cooling. Then, a secondary cooling is performed; their duration is equal to or a multiple of the duration of an injection molding cycle. After being removed from the molds, the preforms are dynamically inserted into the cooling sleeves until they completely contact their housings. The internal cooling is made time-delayed.
SUMMARY
The following summary is intended to introduce the reader into various aspects of the teachings of the applicant, but not to define the invention. In general, one or more methods or devices are described herein with respect to injection molding and cooling of injection molded parts outside the molding area of an injection molding machine.
[0007] In some aspects of the teachings described herein, an injection molding machine (a) comprises a base (b), a pair of plates carried by the base, and supporting the respective mold halves to form a mold; the plates are slidable relative to each other in a direction parallel to a machine axis between a position of an open mold and a closed mold; and (c) a parts handling device for holding and processing parts from the mold. The parts handling device is separate from the mold and includes (i) an output plate comprising at least one set of first cooling receivers for receiving and holding a first set of injection molded parts from the mold, wherein the cooling receivers derive a first amount of thermal energy from the first injection molded parts ; (ii) a supplemental cooling plate comprising at least one set of second cooling receivers for receiving and holding the first set of parts, the second cooling receivers deriving a second amount of thermal energy from the first injection parts; and (iii) a transfer housing having at least one housing side, comprising at least one set of transfer pins for receiving and holding the first set of injection molded parts; the transfer housing is rotatable for moving the at least one housing side of a loading position for engaging the output plate, a complementary cooling position for engaging the supplemental cooling plate, and a dispensing position for releasing molded parts from the parts handling device.
In some examples, the output platen may be movable between a first axis (eg, a z-axis perpendicular to the machine axis) to a first extended position between the mold halves and a first axis retracted position outside of the mold halves; in the first retracted position, the first cooling transducers of the at least one set of first cooling transducers of the dispensing plate may face and be horizontally aligned with the second cooling transducers of the at least one set of second cooling transducers of the supplemental cooling plate.
In some examples, the supplemental cooling plate is fixed to a supplemental side of the base with the complementary side generally parallel to the machine axis. In some examples, a supplemental actuator may be provided to advance or retract the supplemental cooling plate toward and away from the transfer housing.
In some examples, the transfer housing may be rotatable about a housing axis, wherein the housing axis is in a fixed position relative to the base during operation of the machine. The transfer housing may be mounted on a carriage attached to the base and the position of the housing axis relative to the base may be adjustable along the carriage in response to a change in length of the molded parts that were produced.
In some examples, the at least one housing side may be disposed in its complementary cooling position between the supplemental cooling plate and the housing axis along a direction parallel to the machine axis. The at least one housing side of the transfer housing may include a first housing side and a second housing side, the second housing side being disposed substantially parallel to and spaced from the first housing side. The second housing side may be engageable with the supplemental cooling plate when the first housing side is engaged with the output plate, causing simultaneous conductive cooling of respective sets of molded parts in respective sets of the first and second cooling transducers during at least part of the machine cycle becomes.
In some examples, a parts removal mechanism may be provided for detecting molded parts released from the housing side of the
Dispensing position, for transporting injection molded parts out of the machine. The parts removal mechanism may include a conveyor disposed under the transfer housing and carried by the base of the machine.
In some aspects, a parts handling apparatus for holding and treating articles from the mold of an injection molding machine wherein the parts handling device is separated from the mold comprises: a) an output plate comprising at least one set of first cooling pick-up receptacles; Holding a first set of molded parts from the mold; the cooling transducers conductively conduct a first amount of thermal energy from the first injection molded parts; b) a supplemental cooling plate comprising at least one set of a second cooling receiver for receiving and holding the first set of injection molded parts; the second cooling transducers conductively conduct a second amount of thermal energy from the first injection molded parts; and c) a transfer housing having at least one housing side, comprising at least one set of transfer pins for receiving and holding the first set of articles; the transfer housing is rotatable about an axis to move the at least one housing side at a loading position for engagement with the delivery plate; a supplementary cooling position for engagement with the supplemental cooling plate, and a dispensing position for releasing the injection molded parts from the parts handling device.
In some examples, the loading position and the supplemental cooling position may have an angular distance about the housing axis of 180 °. The loading position and the supplementary cooling position may be spaced horizontally on opposite sides of the housing axis, and the dispensing position may be located vertically below the housing axis.
In some aspects, an injection molding machine (a) comprises a machine base; (b) an opposing plate supported by the base and defining a molding area between the plates; (c) a transfer housing remote from the molding area and having at least one housing side, each housing side having a plurality of transfer pins; the transfer housing is rotatable about a housing axis to move the at least one housing side along a loading position, a supplemental cooling position and an unloading position; (d) an output plate having a plurality of first cooling sleeves for receiving shaped articles from the mold for conductive cooling of the injection molded articles contained therein; the output plate is movable relative to the base for presenting the molded articles in the cooling sleeves to the transfer case; (e) a supplemental cooling device having a plurality of second cooling sleeves for receiving molded articles from the transfer housing, conducting cooling the formed articles contained therein, wherein the supplemental cooling device is movable relative to the cooling housing to detect the at least one housing side when in the additional cooling position is located; and (f) a parts removal mechanism disposed at least partially below the housing axis for receiving molded articles released from the at least one housing side in the unloading position.
In some examples, the cooling housing may have two sides, one side engageable with the output plate, and the other side simultaneously engageable with the additional cooling device. In some examples, the transfer pins may be provided with suction channels connectable to a vacuum source; the suction channels draw airflow through the space between an inner surface of the molded parts and an outer surface of the transfer pins, the air flow convectively cooling an inner surface of the molded articles, simultaneously with the conductive cooling by the respective cooling sleeves.
[0017] In some aspects, a method of cooling formed preforms includes (a) transferring preforms from a first injection cycle from a mold to a holding capture on an output plate, the preforms having outer and inner surfaces to be cooled; (b) moving the delivery plate and the transfer case together with the transfer case removed from the mold; (c) releasing the preforms from the dispensing plate and transferring the preforms for holding engagement with the transfer case; (d) merging a supplemental cooling device and the cooling housing; (e) releasing the molds from the transfer case and transferring the holding-holding mold to the additional cooling device; and (f) releasing the preforms from the supplemental cooling device and transferring the preforms back to retaining engagement with the transfer housing.
In some examples, after step f), the transfer housing may be aligned to a discharge position and the preforms may be ejected from the cooling housing. The method may include receiving ejected preforms by means of a part removal mechanism disposed below the cooling housing.
In some examples, step (a) of the method may include supporting the preforms in cooling sleeves fixed to the dispensing plate; the outer surfaces of the preforms abut the inner surfaces of the cooling sleeves when the preforms are in holding engagement with the delivery plate. The outer surfaces of the preforms may be conductively cooled while the preforms are in gripping engagement with the additional cooling device.
Step e) may include loading the preform into supplemental sleeves fixed to the supplemental cooling device. The outer surfaces of the preforms abut against the inner surfaces of the additional sleeves when the preforms are in holding engagement with the additional cooling device.
The method may comprise convective cooling the inner surfaces of the preforms during a period of time extending at least between the completion of step b) and the initiation of step c). The method may include convective cooling the inner surfaces of the preforms during a period of time that extends at least between completing step d) and initiating step e). The convective cooling may include impressing a convective airflow along the inner surface of the preforms. Steps c) and f) may include inserting transfer pins into the interior of the preforms. The
Transfer pins are fixed to the transfer housing and have internal fluid channels that are in conductive communication with the convective airflow. The inner fluid channels may include a proximal opening in the region of the transfer housing having a conductive connection to a chamber in the transfer housing, and a distal opening remote from the proximal opening for communicating with an inner surface of the preforms when the pins are inserted therein; and a suction force may be applied to the proximal openings to introduce ambient air into the preforms.
[0022] In some aspects, a method of cooling includes the preforms: (a) transferring a set of first preform mold core pins to a mold for retaining engagement within first cooling sleeves of an output plate; (b) merging the output plate and a transfer case, wherein the transfer case and the mold are spaced apart; (c) inserting a set of first transfer pins of the transfer housing into the first preforms and forcing a flow of air through the first pins to cool the inner surfaces of the preforms while holding the preforms in the first cooling sleeves; (d) releasing the first preforms from holding engagement with the first cooling sleeves and transferring the first preforms to a retaining engagement with the transfer housing; (e) positioning the preforms into a first set of second cooling sleeves of a supplemental cooling device while the preforms are in holding engagement with the transfer housing; (f) transferring the preforms from the retaining engagement on the transfer housing to a retaining engagement within the second cooling sleeves; (g) urging airflow against the inner surfaces of the preforms while the preforms remain in engagement within the second cooling sleeves; (h) releasing the preforms from retaining engagement within the second cooling sleeves and transferring the preforms back to retaining engagement with the transfer housing; (i) separating the transfer case from the supplemental cooling device; and (j) ejecting the preforms from the transfer housing.
In some aspects, a method of manufacturing cooled injection molding preforms includes conductively cooling the outer surfaces of the preforms during two machine cycles, and simultaneously cooling the outer surfaces of the preforms during the two cycles
Inner surfaces of the preforms. In some examples, the conductive cooling of the outer surface includes holding the preforms in transfer sleeves. The preforms can be held constantly in the same transfer sleeves during the two machine cycles. In some examples, the conductive cooling of the outer surface may include cooling the transfer sleeves with a flow of cooling fluid, and the cooling fluid may be cooled water flowing through inner channels in the transfer sleeves or in the delivery plate. The second cooling stage may include an internal convective cooling path wherein airflow is directed into the preforms and through the pins within the preforms.
In some examples, cooling the inner surface may include inserting a cooling pin into the preform while holding the preform in the transfer sleeve. The cooling of the inner surface may include the injection of cooling fluid flowing through a gap between the pin and the preform. In some examples, the passage of cooling fluid may include passing air through the pen from a pressure source, the outside of the interior surface of the preform, and in some examples, the air may then enter the atmosphere. In some examples, the flow of cooling fluid may include the flow of air (for example, from the atmosphere outside the pin) into the gap, and then into the pin, and the pin may be in fluid communication with a vacuum source.
In some examples, the cooling may include inserting a first pin into the preform during a cooling pause, and then peeling the pin during a first machine cycle, then inserting the pin or other pin into the preform during a subsequent cycle and transferring the preform to the pen at the end of the cycle. The first pin can leave the preform while the preform remains in the transfer sleeve when the pin is removed from the delivery plate. The second pin can remove the preform from the transfer sleeve and hold the preform on a second pin as the second pin is removed from the output plate. In some examples, the flow rate of airflow into the gap (eg, from the atmosphere) relative to the rate at which air is withdrawn from the gap (for example, through the second pin) may be regulated such that the vacuum in the gap is the preform on the second pen stops. In some examples, the method includes transferring the preform from the second pin to a supplemental cooling sleeve.
In accordance with further aspects of the invention, a parts handling apparatus for cooling injection molded articles comprises a first station of external conductive cooling via the output plate, and a second subsequent station of conductive cooling via a supplemental cooling device. The provision of the first and second cooling stations with cooling sleeves (for example, 4 sleeve set on the output plate, 4 sleeve set on a cooling device) can double the amount of time the conductive cooling of the outer surfaces of the preforms is applied relative to a machine with the same Number of sleeve sets only on the output plate (for example, 4 set). Alternatively, the present design may require about the same period of conductive cooling (4 cycles), but half of the cooling sleeves on the output plate (eg, 2 sets on the output plate), and the other half on the supplemental cooling device (for example, another 2 sets). This can reduce the tightness of the sleeves 5 on the dispensing plate so that larger diameter preforms or funnel-shaped preforms can be used.
In further aspects, a rotary joint for a transfer housing of an injection molding machine comprises (a) a housing having a housing interior with at least one distribution chamber in the housing interior space; (b) a rotary member carried by the housing which is rotatable about a housing axis; the rotary member comprises a front panel part to which the transfer case is mounted; (c) at least one mounting aperture in the rotary member having an open outer end against the front panel portion for communicating with the transfer housing, and an inner end disposed within the housing interior; and (d) a flow blocking member within the housing, the flow blocking member being movable relative to the inner end of the mounting path to alternatively enable or inhibit fluid communication between the first manifold chamber and the outer end of the fluid path.
[0028] In other aspects, a method of handling articles during processing by an injection molding machine comprises (a) rotating a rotatable transfer housing to move the first housing side of the transfer housing from a stationary first position to a stationary second position, wherein at least a first set shaped articles is held on a first set of transfer pins on the first housing side in a first position; and (b) while the first housing side is being moved in accordance with the rotation of step (a), the first set of molded articles is released on the first housing side.
In some examples, the first housing side may be moved continuously as it is rotated between the first and second positions. The first housing side may be accelerated from a normal speed of zero in the first position to a maximum rotational speed when alignment occurs between the first and second positions approximately midway.
Further aspects and features of the description will become apparent to those skilled in the art upon consideration of the description of the specific embodiments.
BRIEF DESCRIPTION OF THE DRAWINGS
The accompanying drawings illustrate various examples of the parts, methods and apparatuses of the teaching of the description and are not intended to limit the scope of what is shown. In the drawings: FIG. 1 is a rear perspective view of an injection molding machine in accordance with one or more aspects of the teachings herein.
FIG. 2 is a front view of a part example formed with the machine of FIG. 1.
FIG. 2A is a plan view of the part of FIG. 2.
Figure 2B is a sectional view of the part of Figure 2A taken along lines 2B-2B.
FIG. 3 is a perspective view of a portion of the machine of FIG. 1, showing partial handling features in detail.
Figure 4A is a plan view of a portion of the transfer housing of Figure 3 as viewed from the position of the delivery plate.
FIG. 4B is a sectional view of the structure of FIG. 4A taken along lines 4B -4B.
Figure 5 shows a similar view as Figure 3, wherein the housing is spent in a different position.
Figure 6 is an enlarged view of a portion of the output plate and the housing at a mutual distance.
FIG. 7 shows the structure of FIG. 6 in an engaged position.
FIG. 8 is a perspective view of another part of the parts sheet handling apparatus of FIG. 1.
Figure 9 is an enlarged sectional view of the housing part of Figure 5, vertically through the axis of rotation of the housing.
FIG. 10 is an exploded perspective view of a portion of the structure of FIG. 9.
Figure 11A is a sectional view of the structure of Figure 4 taken along lines 11A-11A.
Figures 11 Bund 11 C show the structure of Figure 11A but with the housing moving through an intermediate position towards the dispensing position.
Figs. 12A and 12B are perspective front and rear views of another part of the parts handling apparatus of the machine of Fig. 1;
FIG. 13 is a perspective view of the structure of FIG. 3; it shows both sides of the housing in engagement with cooling hoses.
FIG. 14 is an enlarged sectional view of a part of the structure of FIG. 13.
Figs. 15a to 15f show another example of a parts handling apparatus.
DESCRIPTION IN DETAIL
Various apparatuses or methods will be described below to give an example of an embodiment of the claimed invention. None of the embodiments described below limits any claimed invention, and any claimed invention may cover methods or apparatus other than those described below. The claimed inventions are not limited to devices and methods with all features or any device having a method as described below or features common to several or all devices described below. It is possible that an apparatus or method as described below is not an embodiment of any claimed invention. Any invention contained in a device or method as described below and not claimed herein may be the subject of another patent, for example a divisional application, and the assignees, inventors or owners are not intended to do so by publication in this application Give up or waive or release the public document.
Figure 1 is an example of an injection molding machine 1100 comprising a base 1102 having a stationary plate 1104 and a movable plate 1106 mounted to the base 1102 and coupled together via pull rods 1108. The movable plate 1106 may extend along the machine axis 1105 from the stationary plate 1104 away as well as to move on this. Between the plate 1104, 1106, a mold 1107 may be at least partially formed of a first mold half 11 04a mounted on the stationary plate 1104, and a second mold half 11 06a mounted on the movable plate 1106. An injection unit 1100 is attached to the base 1102 mounted for injecting resin or other molding material into mold 1107 to form a molding.
In the illustrated embodiment, the injection molding machine 1100 is shown for forming preforms that can be used as a starting material for subsequent processing, for example, a blow molding process for making beverage containers. Referring to Figure 2, an exemplary preform 112 is shown comprising a substantially elongate sleeve-shaped article extending along a preform axis 114 with open and closed ends 116, 118 facing each other. In the region of the open end 116, a threaded portion 120 may be provided for receiving a closure. A radially outwardly extending annular flange 122 may be provided in the region of the threaded portion 120; Threaded portion 120 is located axially between open end 116 and flange 112. The preforms have an inner surface 124 which has a substantially cylindrical inner housing portion 124a along the axial extent of the preform (between the open and closed ends), and a further substantially concave inner end portion 124b at the closed end. Preform 112 has an outer surface 126, spaced from inner surface 124, with a substantially cylindrical outer housing portion 126a along the axial extent of
Preform and a convex large end portion 126b at the closed end. The spacing between the inner and outer surfaces 124, 126 defines a preform case thickness 128.
Returning to FIG. 1, in the illustrated embodiment for producing the preforms, the first mold half 11 04a (attached to the stationary plate 1104) may include a recess side of the mold 1107 with recesses (or cavity) 1130 for forming the outer surface 1126 of the preforms 112. The second mold half 11 06a may include a core side of the mold 1107 having mold core pins 1132 for insertion into the mold cavity 1130 and for molding the interior surface 124 of the preforms 112. In the illustrated embodiment, the machine 1100 comprises an equal amount of mold cavities 1130 and mold cavities 1132 this quantity defines the nests number of Form 1107. Typical mold cavity numbers are 16, 32, 48, 96 or more. In the illustrated embodiment, the mold nest number is 16, and the mold has 16
Mold nests 1130 and 16 mold pins 1132.
To Figure 3. The injection molding machine 1100 is equipped in the illustrated embodiment, with a parts handling device 1140 for moving and / or treating objects is formed form 1107 of the machine. The parts sheet handling device 1140 includes a rotatable transfer housing 1142 having at least one housing side 1144. Each of the at least one side 1144 is rotatable about a housing axis 1146 together with the transfer housing 1142. In the illustrated embodiment, the housing axis 1146 extends substantially horizontally and perpendicular to the machine axis 1105. In the example shown, the transfer housing 1142 has two substantially planar sides, with a first side 1144a and a second side 1144b (FIG. 4). The sides at the sides are substantially parallel to each other as well as on opposite sides of the axis 1146. Transfer housing 1142 may hold molded parts to facilitate moving the parts from one part of the machine to another, and may alternatively or alternatively cool molded parts facilitate (in some cases, transfer housing 1142 will be referred to as " cooling cabinet ").
Referring now to Figure 4, housing 1142 includes a plurality of inner housing chambers 1149 equipped with corresponding sides 1144 of housing 1142. In the illustrated embodiment, housing side chambers 1149 include a first housing side chamber 1149a proximate (and / or at least partially connected to) one (r) Inner surface of the first side 1144a. Housing 1142 further includes a second housing side chamber 1149b proximate (and / or at least partially in contact with) an inner surface of second side 1144b. The housing includes an inner housing 1151 that divides the interior of the housing into two housing-side chambers 1149a and 1149b.
Rotation of transfer housing 1142 about housing axis 1146 results in moving sides 1144 between various stations 1150. Stations 1150 may include four stations, 1150a-1150d (Figure 3) separated by 90 ° increments about housing axis 1146. *** " One of the stations (for example, the first station 1150a) may include a loading station for loading objects onto the
Housing 1142 and another station (eg, the fourth station 1150d) may include an unloading station 1150d for unloading articles from housing 1142. At least one possible additional treatment station may be provided between the loading and unloading stations 1150a, 1150d.
In the illustrated embodiment, one side of the housing 1142 in the loading station 1150a, when vertically aligned and closest to the mold 1107, is along the machine axis. In FIG. 3, the first side 1144a of the housing is located in the charging station 1150a. One side of the
Housing 1142 is in the illustrated embodiment in unloading station 1150d when aligned in a substantially horizontal plane below housing axis 1146. In Figure 5, the second side 1144b of the housing is located in unloading station 1150d.
At least one of the second and third stations 1150b, 1150c may comprise an additional treatment station. In the illustrated embodiment, the third station 1150c includes an additional treatment station opposite the charging station 1150a. The second station 1150b may include a second additional treatment station provided opposite the unloading station 1150d. The additional treatment stations may repeat some or all of the cooling treatment as provided at the charging station and / or unloading station. Also, the additional treatment stations may perform additional cooling treatment, such as cooling fluid along the outer surfaces of the preforms.
In the illustrated embodiment, the housing is rotated in a clockwise direction about the housing axis, as seen on the front of the housing (that is, when looking at the non-operating side of the machine 1100), as shown in Figure 3. When indexing the housing (that is, rotating the housing 90 °), the first side 1144a is moved from the loading position 1150a to the position 1150b, and at the same time, the second side 1144b moves from the additional processing position 1150c to the dispensing position 1150d (see FIG. 5). Indexing the cooling housing a further 90 ° moves the first side 1144a (in the illustrated embodiment) to the additional treatment station 1150c, located opposite the charging station 1150a. Another indexing by 90 ° (ie a total of 270 ° of the
Loading position 1150a) moves the first side 1144a to the unloading position 1150d. In an alternative example, the housing is rotated clockwise or may alternate between clockwise and counterclockwise rotation during various stages of the machine cycle.
Referring to Figures 4 and 7: in the illustrated embodiment, the parts handling device 1140 further comprises a plurality of housing receivers in the form of transfer pins 1154 (also called retaining cooling pins). The carrier pins 1154 (including a first set of first transfer pins 1154a and at least one second transfer set of second transfer pins 1154b) are disposed on each side 1144 of the housing 1142. The transfer pins 1154 are configured in the illustrated embodiment to cool the inner surfaces of the preforms and to hold the preforms on the pins as the cooling housing indexes the sides 1144 at at least some of the various stations 1150.
Each transfer set (also called a pickup set) can have an equal number of individual pickups (ie, individual hold cooling pins 1154), and the amount of hold cooling pins in that set can be equal to the number of mold cavities in the form 1107. In the illustrated embodiment, there are three picker sets on each of the at least one side 1144 of the housing 1142. Each picker set 16 has 16 pickups (the first picker set has 16 first hold cooling pins 1154a, the second pick set has 16 hold cooling pins 1154b, and a third pick set has 16 third pick cooling pins 1154c -see Figures 4 and 9). There are three picker sets per side 1144 and therewith a total of 48 pickups (ie 48 hold cooling pins 1154) per side of the cooling housing 1142 and a total of six picker sets on the housing 1142 (a total of 94 hold cooling pins 1154 on the housing).
The pins 1154a of the first set of pins are arranged in a pin pattern at a mutual distance. In the illustrated embodiment, the pin pattern is defined by two collapses, which have a mutual horizontal distance by a collin splitting. The pin pattern comprises eight rows spaced in the vertical direction, which in the example shown is not equal between each pair of adjacent rows. The second sentence of
Pins 1154b and the third set of pins 1154c are disposed on the same pin pattern relative to each other as the first set of pins 1154a.
Referring to Figure 6, in the illustrated embodiment, each of the hold cooling pins 1154 is longitudinally along a first pin axis 1155 and includes a first pin base 1158 fixed to the respective side of the housing. A first pin end 1160 is spaced from base 1158 (along transducer axis 1155). A first pin-side housing extends between base 1158 and end 1160. A first pin-flow channel 1162 may extend through each cooling pin 1154. Each fluid channel 1162 has one or more proximal openings 1162a in the region of the base 1158 for fluid communication between channel 1162 and a respective housing side chamber 1149 to which the holding cooling pin 1154 is attached. One or more distal openings 1162b for communicating between fluid channel 1162 and a gap 1101 are provided between the outer surface of the holding cooling pin 1154 and the inner surface of a preform 112 into which the pin is inserted.
Referring to Figures 1 and 8, an output plate 1164 is movable between mold 1107 and cooling housing 1142 for transferring parts therebetween. The dispensing plate transfers parts of the mold to a position out of the mold for engagement by the pins 1154 of a side 1144 of the refrigerator housing positioned in the loading station. When the first side 1144a is in the loading position 1150a, parts are transferred to the first or second or third set of holding cooling pins 1154a, 1154b, 1154c of the first side 1144a of the cooling housing 1142 during a (first) injection cycle and parts can be transferred from of the mold to the first, second or third set of holding cooling pins 1154a, 1154b, 1154c of the first side 1144a during another (for example second) injection cycle. In this description, a numbering of the injection cycles is used to identify different injection cycles from each other. Incremental numbering does not necessarily define a particular order of some of the parts in question where such an order is expressly stated.
In the illustrated embodiment, the output plate 1164 is connected to a linear robot 165 that can move the output plate 1164 along a first robot axis 1166 between an extended position where the output plate is disposed between the mold halves 11a, 11a, and at least one retracted position in which the output plate 1164 is free of the mold 1107 (Figure 3). In the illustrated embodiment, the first robot axis (z-axis) 1166 extends parallel to the housing axis 1146. Furthermore, the output plate 1164 in the illustrated embodiment zerfahrbar along a second robot axis (x-axis) 1168, which is parallel to the machine axis 1105.
Output plate 11 has a number of first heatsinks for receiving molded parts from mandrel pins 1132. In the illustrated embodiment, the cooling headers have the shape of first cooling sleeves 1170. The number of first cooling sleeves may be equal to or greater than the number of nests of the mold 1107. It may be equal to or greater than the number of hold cooling pins 1154 of each picker set. In the illustrated embodiment, the number of first cooling sleeves 1170 on the output plate 1164 includes three sets of 16 sleeves - a first set of sleeves 1170a, a second set of sleeves 1170b, a third set of sleeves 1170c, for a total of 48 transfer sleeves. The first set of the first cooling sleeves 1170a of the output plate 1164 is, in the illustrated embodiment, spaced apart in a sleeve pattern of eight rows and two columns corresponding to the thin pattern. The sleeves of the second and third sets of transfer sleeves are likewise spaced apart in the same sleeve pattern of eight rows and columns; in the example shown, they cooperate with the first set of sleeves 1170a.
In the illustrated embodiment, the dispensing plate 1164 may move to an extended position on a first x-axis (along the first robot axis 1166) with the first set of sleeves 1170a aligned with the mandrel pins 1132 to provide preforms 112 therefrom. The output plate 1164 also translates to a second extended position on the z-axis (along the first robot axis 1166) with the second set of sleeves 1170b aligned with the mold core pins 1132 and to a third extended position on the z-axis , wherein the third set of sleeves 1170c is aligned with the mandrel pins 1132.
The output plate 1164 can also be moved to a retracted position on the z-axis (along the first robot axis 1166) to selectively move the first cooling sleeves 1170 to the pins 1154 on the side 1144 of the housing in the loading station 1150a. In the illustrated embodiment, the output plate 1164 is movable relative to the cooling housing to a retracted position on the z-axis with 48 transfer sleeves 1170 aligned simultaneously with corresponding ones of the 48 transfer pins 1154 of the housing side in the loading position. The first set of sleeves 1170a is aligned with the first set of cooling pins 1154a, the second set of sleeves is aligned with a second set of cooling pins 1154b, and the third set of cooling sleeves 1170c are aligned with the third set of cooling pins 1154c.
To Figure 9: housing 1142 is rotatably mounted on a support column 1462. Support column 1462 is adjustably supported in the illustrated embodiment of a rail 1407 which is fixed to the machine base 1102 and aligned parallel thereto. In rail 1407 bearing shoes 1409 can be engaged, which are fixed to support column 1462. This may facilitate adjusting the axial position of the cooling housing depending on the axial length of a particular preform to be created. For example, when manufacturing shorter preforms, the cooling housing can be moved along the rail against the stationary plate 1104 (and then locked in place, which can vary the length of travel along the x-axis that the output plate must travel when parts Further, in the illustrated embodiment, rail 1407 for supporting the support pillar 142 is the same rail as that used to support the robot to which the output plate is attached, which can provide accurate relative alignment between the output plate and the cooling housing.
Referring to Figure 10, support column 1462 includes a manifold 1411 having a manifold interior for conductive communication with a fluid pressurization device.
In the illustrated embodiment, the cooling housing 1142 is connected to the support pillar 1462 by a rotary joint 1413, which is rotatably supported within the manifold housing 1412 and which allows the cooling housing 1142 to be rotated relative to the support pillar 1462. Rotary coupling 1413 includes at least one mounting opening 417, which then establishes a conductive connection between the distributor of the support column 1462 and the cooling housing 1142, when on
Support column 1462 is mounted. In the illustrated embodiment, the rotary joint 1413 has two openings 1417a and 1417b providing a conductive connection between the manifold and the respective housing side chambers 1149a, 1149b.
In the illustrated embodiment, manifold 1411 has a first manifold chamber 1421 in housing 1412 in conductive communication with the housing side chamber 1149 of each side when in and between loading position 1150a and additional station 1150c (see Figure 11a). Manifold 1411 also includes a second chamber 1423 separate from first chamber 1421 and in communication with housing side chamber 1149 from side 1144 in uncharged station 1150d (see Figure 11c).
In the illustrated embodiment, the rotary joint 1413 has a substantially cylindrical outer surface and an inner mounting chamber, which are in conductive communication with each other. They form axial projections of each housing side chamber. The openings 1417a, 1417b are located in the outer side wall of the rotary joint on their opposite sides (180 ° apart) and opening into corresponding inner mounting chambers. When the rotary joint is rotated, the openings migrate between communication with the first chamber 1421 and the second chamber 1432. A partition wall 1427 opposed first and second side surfaces 1427a, 1427b extend transversely across a portion of the interior of the manifold.
The first manifold chamber 1421 has a first manifold opening 1431 in fluid communication with the fluid pressurization device 1401.
The conductive connection can be achieved via a first line whose one end is connected to the first distributor opening 1431, and whose second end is connected to the fluid-pressure application device 1401. The first conduit may be free of valves or other shut-off elements to ensure continuous fluid communication between the fluid pressurizing device 1401 and the first distribution chamber 1421. In the illustrated embodiment, the first conduit is connected to the inlet of the fluid pressurizing device 1401, generally with a vacuum in the first distribution chamber 1421.
The second distribution chamber 1423 has a second distribution opening 1437 in fluid communication with a fluid pressurizing device. In the illustrated embodiment, port 1437 is connected to a pressure source, such as a source of compressed air or to the outlet of a fan; this provides for a continuous pressure in the second chamber 1423.
Referring to Figure 14, a holding force may be applied to the preforms after (and optionally also before and / or during) the transfer of the preforms from the corresponding set of sleeves 1170a or 1170b of the dispensing plate to the corresponding set of holding cooling pins 1154 of the cooling housing. The holding force may help to hold the preforms 1112 against the holding cooling pins 1154. In the illustrated embodiment, the holding force is at least partially generated by a negative pressure prevailing in a gap 1501 between an outer surface of the cooling pins 1154 and an inner surface of the preforms 1112. The suppressor may create a suction force to promote retention of the preform on the pin, if desired.
[0077] Each transfer pin 1154 may be provided with slots 1503 or similar flow openings at its base, thus allowing an overall inlet area (for accessing ambient air to the space) smaller than the outlet area (for drawing air from the space to the housing). Side chamber 1149 via channel 1162). A flow of cooling fluid (indicated by arrows 1505) may be established while at the same time creating a negative pressure in the gap 1501 for holding the preform 1112 on the pin 1154.
A similar second gap 1502 is provided between the inner surface of the preforms 112 and the outer one of the cradle cooling pins 1354. In the embodiment shown, however, no flow openings are provided for balancing the amount of air with the pressure differential between the gap 1502 and the environment. This may favor the generation of a stronger flow of cooling fluid in the second space 1502.
In the illustrated embodiment, a continuous negative / cooling fluid flow 1505 is provided at least between the time the respective housing side chamber is in the charging station until the time the corresponding housing side chamber arrives at the unloading station. In the embodiment shown, the fluid flow 1505 is maintained at least until the unloading station is ejected. The duration of the fluid flow 1505 at the unloading station prior to ejection may be at least 50 percent, in some cases even more than 75 percent, of the total time that the corresponding side of the housing is at the unloading station. In the embodiment shown, a fluid flow 1505 is provided for more than 90 percent of the total time duration during which the corresponding side is at the unloading station.
Referring to Figure 8, the output plate 1164 includes a carrier to which a plurality of output transducers are attached. The dispensing receivers are configured and arranged to cooperate with injection molded parts in one half of the mold (that is, the core half or mold cavity half). In the embodiment shown, the support is in the form of a plate member 1511, and the delivery receiver corresponds to the transfer sleeves 170 designed to cooperate with the preforms on the pins of the mold core half.
With reference to FIG. 6, in the example shown, plate part 1511 has a front surface 1513, and transfer sleeves 1170 protrude from front surface 1513 of plate part 1511. Each sleeve has an inner nest 1519 for receiving a preform. the nest 1519 has an open outer end 1521 and a substantially closed bottom end 1523. Nest 1519 may be configured to mate with the outer profile of the preform 112 received therein. At least parts of the outer surface of the preform to be cooled abut against the inner surface of the transfer sleeve. In the example shown, the closed bottom end 1523 is designed to abut the outer surface 126B of the closed convex end (dome-like portion) of the preform.
Referring to FIGS. 12A and 12B, the supplemental cooling device 1610 includes features that in many respects correspond to the output plate 1164. The supplemental cooling device comprises a plurality of second cooling receptacles in the form of second sleeves 1612 fixed to a support plate 1614. The receptacles comprise at least a first supplemental sleeve set with first complementary sleeves 1612a, an equal number and spaced as the first pins 1154a of the first set of pins , In the example shown, the additional cooling device 1610 further includes a second set of additional sleeves with second additional sleeves 1612b, and a third set of additional sleeves with third additional sleeves 1612c. The sleeves 1612b and 1612c are also arranged to cooperate with the number and spatial arrangement of the pin patterns of the second set of pins 1154b and the third set of pins 1154c.
The supplemental cooling device 1610 is in the example shown movable relative to the cooling housing 1142 between a complementary engagement position (Figure 13) and a complementary released position (Figure 3). In the supplemental engagement position, support plate 1614 and housing side 1144 are positioned and mated with the supplemental cooling station 1150c, with the first set of pins 1154a engaging the additional sleeves 1612a of the second set of pens. Likewise, in the additional engaged position in the example shown, the second pins 1154b and the third pins 1154c engage the corresponding second additional sleeves 1612b and the third additional sleeves 1612c. In the additional released position, the additional sleeves 1612 are removed from the cooling pins 1154 so that unimpeded rotation of the housing 1142 is possible in the example shown.
In the example shown, the carrier plate 1614 (and the additional sleeves 1612 fixed thereto) is moved between the additional engaged position by (x-axis) displacement along a first additional axis 1612, parallel to the machine axis 1105. In some examples, the carrier plate 1614 may be moved in other directions or along other axes including multiple axes.
In use, a set of parts ("Set A") is generated in a first injection cycle. Once the parts are partially cooled enough to allow removal from the mold without damaging or altering the shape of the parts, the mold is opened and the first set of parts is transferred from the mold to a retaining engagement on the dispensing plate ,
In the example shown, the molded parts are preforms that are still warm when removed from the mold. The preforms have outer surfaces and inner surfaces which are subsequently to be cooled. Engaged on the output plate, the outer surfaces of the preforms are conductively cooled, for example, as shown, adjacent the inner surfaces of the transfer sleeves 1170. The preforms may be closely embedded in the transfer sleeves. A first depression, applied to the interior of the sleeves, can reliably hold the preforms in the sleeves. A scraper plate or similar structure may be provided on the mold to facilitate the release of the preforms from the mold core pins.
Once the parts have been placed on the transfer sleeves, the delivery plate may exit the forming area (ie, the retracted position on the z-axis) so that the mold can be closed again to form a subsequent set of parts in the mold to create.
Out of the mold, the output plate and the cooling housing can move together. In the example shown, the output plate is placed in the extended position on the x-axis (task-engaged position), at which time the case-side pins 1154 in the loading position 1150a are positioned axially within the respective transfer sleeves 1170.
In the example shown, the output plate is completely loaded with preforms in the load-engaging position during continuous operation. The first set of parts may in the example be populated in the first set of sleeves 1170a of the output plate 1164. A previous set of parts ("Set Z") generated in the previous injection cycle may have been loaded in the sleeves 1170c of the third sleeve set, and a set of parts generated in a previous cycle ("Set Y" parts) may be transfer sleeves 1170b of the second set.
All of the sleeves 1170 provide conductive cooling of the outer surfaces of the preforms that are engaged in the sleeves 1170.
In the loading engagement position, corresponding pins 1154a, 1154b and 1154c engage the preforms held in the respective sleeves 1170a, 1170b and 1170c. In the example shown, a cooling of the inner surfaces of the preform is made by convection. Convective cooling, in the example, is created by a suction air stream that draws air into the open end of the preform, through the gap 1501 between the pin and inner surface of the preform, then through the distal ends of the channel in the pin, and then into the housing side chamber. In the example shown, the suction force holding the preform in the sleeve is greater than the suction force generated in the gap 1501 by the cooling of the pin by an air flow, so that the preform is held in the sleeve while the sleeve suction force is applied.
At the loading position prior to withdrawal of the delivery plate 1164 from the transfer chiller housing 1142, at least one set of preforms may be released from engagement on the delivery plate and transferred to the transfer housing 1142 for retention engagement. In order to facilitate the release of preforms from engagement with the sleeves and to transfer to the retaining engagement on the housing, the sleeve suction force can be interrupted and reversed to push the preform out of the sleeve. The suction force applied by the pen can bring the preform into holding engagement with the pen. In the example shown, the preform is pulled against a seat located near the base of the pin by means of vents or valves that remain open to allow continuous airflow into and through the gap 1501. In some examples, the base of the pin may have a sealing surface, and the edges of the open end of the preform may abut the sealing surface when the preform is in holding engagement with the housing. The engagement of the sealing surface can increase the suction force in the space 1501, which in turn increases the holding force of the preform on the pin when it is transferred to the preform.
Transfer pin 1154 may have an elastic end pushed away from the base, which communicates with the dome-shaped part when the delivery plate is in the loading position, before and after the transfer of the preforms from the delivery plate to the housing, respectively. In the example shown, a spring is used to press the free end away from the base.
In the example shown, the coldest set of the three sets of preforms in the output plate (that is, those preforms which have been held on the output plate for the longest time, the "Set Y" parts in this example) are transferred from the output plate to the cooling housing (for example, the second set of sleeves 1170b to the second set of pins 1154b).
After transferring the set of preforms to the housing 1142, the output plate 1164 may be withdrawn from the housing 1142, and housings 1142 may be rotated 180 degrees to pass the first housing side to the supplemental cooling station. In the example shown, the housing is rotated 180 degrees clockwise (as viewed from the non-operating side of the machine) with 90 degrees rotation through station 1150b with the first housing side positioned substantially vertically above the housing axis, and then around 90 degrees to the complementary cooler on station 1150c.
At the supplemental cooling station 1150c, the supplemental cooling devices and the cooling housing may be brought together to a complementary engagement position in which the cooling pins are disposed axially within at least a portion of the length of the complementary cooling sleeves. In the complementary engaged position, the preforms are held on the cooling pins and inserted into the interior of the complementary sleeves. The preforms may then be released from the cooling housing and transferred into holding engagement with the supplemental cooling device. In the example shown, prior to transferring the part, a small gap is made between the outer surface of the preforms in the housing and the inner surface of the supplemental sleeves. The transfer is facilitated by applying a negative pressure to the interior of the supplementary sleeves. The sleeve vacuum is greater than the cooling pin vacuum, so that the preforms are pulled axially away from the pins and fit snugly into the supplemental sleeves.
In the embodiment shown, the preforms are transferred from the housing to the complementary device, generally immediately after the device in the complementary engagement position. The supplemental device may then hold this position during a cooling pause until the injection cycle makes it necessary to rotate the housing to receive the next set of parts from the delivery plate. The supplemental sleeves produce conductive cooling of the outer surfaces of the preforms that are held in engagement (similar to the conductive cooling provided by the output sleeves). During the cooling pause, the inner surfaces of the preforms can be simultaneously cooled by convective cooling, generated by the flow of air through the pins. In the example shown, a simultaneous internal and external cooling of the preforms is achieved on both sides of the housing (see Figures 13 and 14).
During steady operation in the example shown, the supplemental cooling device has only a single empty set of supplemental sleeves. The set of empty tubes at each cycle corresponds to the single set of housing-side cooling pins that are preformed. In the example shown, the supplementary sleeves of the two other sets carry preforms fitted in previous injection cycles. For example, the set of preforms (set Y) that loaded the pins 1154b of the second set may be inserted into the empty supplementary sleeves 1612b of the second set. The third set of supplemental sleeves 1612c may be populated with a set of preforms (Set W) from a previous injection cycle, and the first set of supplemental sleeves 1612a may be populated with a set of preforms formed in a previous injection cycle. The coldest preforms (from the earliest injection cycle) may be transferred back to the housing by the supplemental device prior to releasing the housing. The vacuum of the respective sleeve set may be turned off and a positive pressure applied to facilitate transferring the preforms from the supplemental sleeves to the housing. As the housing side rotates through the discharge position, the vacuum in the housing side chamber switches to positive pressure to facilitate falling out of the preforms.
Considering the progress of the first set of parts in the example shown, upon withdrawal from the mold, the preforms of the first set are retained in the transfer sleeves 1170a and reach the first set of cooling pins 1154a of the housing during a first subsequent cycle engaged they are conveyed away from the housing back to the mold and then back to the housing for a second cycle, carried back to the mold and then to the housing for a third cycle, after which the first preforms are transferred to the housing. The housing is twisted and the first set of preforms is then transferred to the first set of complementary sleeves 1612a with subsequent engagement of the pins during a fourth cycle, then removed from the pins (while retained in the complementary sleeves) and fed back into engagement the pins during a fifth cycle; then they are moved back and brought back into engagement with the pins during a sixth cycle, whereupon the first set of preforms is conveyed back to the housing.
Returning to FIGS. 15a to 15f. Here is shown another example of a part of an injection molding machine 2100 having features similar to machine 1100 having similar reference numerals based on 1000.
Machine 2100 includes a parts handler 2140 for holding and treating parts from the mold of injection molding machine 2100. The parts handler 2140 is separate from the mold. It includes an output plate 2164 having at least one set of first cooling receptacles 2170 for receiving and holding a first set of molded parts from the mold. In the example shown, the output plate has three sets of first cooling sensors 2170. The first coolers 2170 are in the form of cooling sleeves in the example shown, and are referred to as first cooling sleeves 2170. The first heatsinks 2170 conduct a first amount of thermal energy conductively away from the first molded parts.
The parts handling apparatus 2140 further includes a supplemental cooling plate 2610 having at least one set of second cooling receivers 2610 for receiving and holding the first set of parts. The second heatsinks 2612 are configured to conductively dissipate a second amount of thermal energy from the first molded parts held therein. The supplementary cooling plate has, in the example shown, three sets of second cooling transducers 2612. In the example shown, the supplemental cooling plate is fixed to a supplemental carriage 2651 on the base. The supplemental carriage runs essentially parallel to the machine axis (see FIG. 15D). A supplemental actuator (similar to the actuator 1653 of Figure 12A) is coupled in the example shown to the supplemental cooling plate 2610 for extending and retracting the supplemental cooling plate 2610 toward and away from the transfer housing.
The parts handling apparatus 2140 further includes a transfer housing 2142 having at least one housing side, comprising at least one set of transfer pins 2154 for receiving and holding the first set of parts. In the example shown, the transfer housing 2142 has only a single housing side 2144, with three sets of transfer pins 2154 (each set comprises two columns of pins 2154).
The transfer housing 2142 is rotatable about a housing axis 2146 for moving the at least one housing side 2144 through a loading position for engagement with the output plate 2164, a supplemental cooling position 2150c for engagement with the supplemental cooling plate, and a discharge position 2150d for releasing the injection molded parts the parts handling device 2140.
In operation, the output plate 2164 travels to an extended position in the z-axis for receiving a first set of molded parts in a first set of first cooling sleeves 2170 from the mold core pins of the mold of the injection molding machine. The output plate 2164 then moves back to the retracted position on the z-axis (the mold is released so that it can be closed for the next injection cycle) and captures the housing side 2144. In the example shown, this detection involves moving the output plate 2164 in FIG an extended position on an x-axis so that the transfer pins 2154 of the transfer case 2142 penetrate into the interior of the preforms. The position is illustrated in Figure 15A.
In the example shown, the output plate 2164 has three sets of first cooling sleeves 2170. The first set of preforms remains in the first set of first cooling sleeves 2170 until the other two sets are loaded with respective preforms. The release plate 2164 releases the transfer housing 2142 by moving it to the retracted position on the x-axis, taking the first set of preforms 112 before entering the mold area at an appropriate time in the next two cycles.
After loading the third set of the first cooling sleeves 2170 of the output plate 2164, the output plate again detects the transfer housing 2142. However, before releasing, the first set of molded parts from the first set of cooling sleeves 2170 are released from the first set of the first cooling sleeves 2174 and Then, the delivery plate 2164 releases the transfer housing with the first set of the first cooling sleeve empty and ready to receive the next set of injection molded parts from the mold of the machine. As shown in FIG. 15b, the injection moldings 112 of the first set are held on the transfer pins 2154 of the first set of the housing side 2144 of the transfer housing 2142.
Also, Figure 15B shows the following: With the release plate 2164 in the retracted position on the axis (x-axis), the first headers 2170 of the at least one set of headers face the exit plate 2164 and in vertical and horizontal alignment with the second heatsinks 2612 of the at least one set of the second headers of the additional cooling plate 2610. This is illustrated by dashed line 2613a in Figure 15B, which shows the horizontal and vertical orientation of a selected first heatsink 2170a with a corresponding second heatsink 2612a.
Referring to Figure 15C, upon release of the dispensing plate 2164 and transfer case 2142 and with the first set of molded parts held on the transfer pins 2154, transfer case 2142 is rotated 180 degrees to rotate the case side 2144 to the complementary cooling position. Transfer housing 2142 then captures additional cooling plate 2610, with the first set of preforms 2112 entering a corresponding set of empty second headers (second cooling sleeves) 2612. This condition is shown in Fig. 15D. In the example shown, the supplemental cooling plate is slidably coupled to the machine base 2102. A supplemental actuator pushes the supplemental cooling plate from a supplemental retracted position to a complementary extended position.
The first set of preforms 112 is quickly released after engagement by the supplemental cooling plate in the example shown disengaged by the transfer pins 2154 and engaged with the second cooling sleeves 2162 of the supplemental cooling plate 2160, with the outer surfaces of the preforms 2112 attached to the Inner surfaces of the second cooling sleeves for conductive heat dissipation away from the preforms 2112 abut.
Referring to Figure 15E, the first set of preforms remains in the second cooling sleeves 2612 for two further cycles (that is, in the case of engine start-up, until the second and third sets of second cooling sleeves 2612 are loaded with a corresponding set of preforms). , Prior to the release of the transfer housing 2142 and the supplemental cooling plate 2612, the first set of preforms 2112 is then released from engagement with the set of second cooling sleeves 2612 and then returned for application to the set of transfer pins 2154.
In Fig. 15F, the transfer case 2142 was rotated by 90 degrees to bring the case side 2144 to the unloading position. In or upon passing through the unloading position, the first set of preforms may be released from the transfer pins 2154 and then removed by a take-off mechanism 2655. In the example shown, the parts picking mechanism 2655 includes a conveyor disposed below the transfer housing 2142. The conveyor is supported by the base 2102 of the machine 2100 in the example shown.
While the above description shows examples of one or more methods or devices, it should be understood that other methods or devices are within the scope of the appended claims.

权利要求:
Claims (29)
[1]
Claims 1. An injection molding machine comprising: a) a base; b) a pair of plates carried by the base; the plates support respective mold halves to form a mold and the plates are movable relative to one another in a direction parallel to the machine axis between an open and a closed position of the mold; and c) a parts handling device for holding and treating parts from the mold; the parts handling device is separate from the mold and comprises: i) an output plate comprising at least one set of first cooling receptacles for receiving and holding a first set of molded articles from the mold; the first heatsinks conduct a first amount of thermal energy conductively away from the first shaped articles; ii) a supplemental cooling plate comprising at least one set of second cooling receptacles for receiving and holding the first set of articles; the second coolers conductively conduct a second amount of thermal energy away from the first molded objects; and iii) a transfer housing having at least one housing side, comprising at least one set of transfer pins for receiving and holding the first set of articles; the transfer housing is rotatable to move at least one housing side between a loading position for engagement with the output plate; a supplementary cooling position for engagement with the supplementary cooling plate, and an unloading position for releasing molded articles from the parts handling device,
[2]
2. An injection molding machine according to claim 1, wherein the output plate is movable along a first axis to an extended position on the first axis between the mold halves and a retracted position on the first axis outside the mold halves, wherein the first cooling sensor of the at least one set of the first cooling sensor the output plate in the retracted position on the first axis to the second cooling sensors of the at least one set of the second cooling receiver of the complementary cooling plate opposite and are aligned vertically and horizontally with these.
[3]
3. Injection molding machine according to claim 2, wherein the complementary cooling plate is mounted on a complementary carriage which is fixed to the base, wherein the supplementary carriage is substantially parallel to the machine axis.
[4]
The injection molding machine of claim 3, further comprising a supplemental actuator for advancing and retracting the supplemental cooling plate against and away from the transfer housing.
[5]
5. Injection molding machine according to one of claims 2 to 4, wherein the transfer housing is rotatable about a housing axis, wherein the housing axis is arranged in a fixed position relative to the base during operation of the machine.
[6]
6. An injection molding machine according to claim 5, wherein the transfer case is mounted on a housing carriage fixed to the base, and the position of the housing axis relative to the base along the housing carriage is adjustable in response to a change in the length of the molded articles produced.
[7]
7. Injection molding machine according to claim 6, wherein the at least one housing side is arranged in the complementary cooling position between the complementary cooling plate and the housing axis along a direction parallel to the machine axis.
[8]
8. Injection molding machine according to one of claims 1 to 7, wherein the at least one housing side of the transfer housing comprises a first housing side and a second housing side, wherein the third housing side is substantially parallel to the first housing side and a distance to this occupies.
[9]
9. Injection molding machine according to claim 8, wherein the second housing side is engageable with the complementary cooling plate when the first housing side is in engagement with the output plate, wherein at least during a portion of the operating time of the machine, a simultaneous conductive cooling of the respective set of molded articles takes place in the corresponding set of the first and second cooling sensors.
[10]
10. An injection molding machine according to any one of claims 1 to 9, further comprising a parts removal mechanism for receiving molded articles released from the housing side in the unloading position and transporting the molded articles from the machine.
[11]
11. Injection molding machine according to claim 10, wherein the parts removal mechanism comprises a conveyor, which is arranged under the transfer housing and supported by the base of the machine.
[12]
A parts handling device for holding and treating articles from a mold of an injection molding machine, the parts handling device being separate from the mold and comprising: a) an output plate comprising at least one set of first cooling receptacles for receiving and holding a first set of molded articles from the mold, wherein the first cooling sensors conductively discharge a first amount of thermal energy from the first molded articles; b) a supplemental cooling plate comprising at least one set of second heatsinks for receiving and holding the first set of articles, the second heatsinks conducting a second amount of thermal energy from the molded articles; and c) a transfer housing having at least one housing side, comprising at least one set of transfer pins for receiving and holding the first set of articles, the transfer housing being rotatable about an axis to move the at least one housing side between a loading position for engaging the receiving plate, an additional one Cooling position for engaging the additional cooling plate, and an unloading position for releasing the molded articles from the parts handling device.
[13]
13. The apparatus of claim 12, wherein the loading position and the supplementary cooling position are offset in the direction of rotation about the housing axis by 180 degrees.
[14]
14. The apparatus of claim 13, wherein the loading position and the supplementary cooling position horizontally and on opposite sides of the housing axis have a mutual distance and the discharge position is vertically below the housing axis.
[15]
15. An injection molding machine comprising: a) a machine base; b) defining opposing plates supported by the base and a forming region between the plates; c) a transfer housing remote from the mold area and having at least one housing side, each housing side having a plurality of transfer pins, the transfer housing being rotatable about a housing axis for passing at least one housing side through a loading position, a supplemental cooling position and an unloading position; d) an output plate having a plurality of first cooling sleeves for receiving molded articles from the mold and for conducting cooling the molded articles held therein, the output plate being movable relative to the base for keeping the shaped articles in the cooling sleeves in the transfer housing; e) a supplemental cooling device having a plurality of second cooling sleeves for receiving shaped articles from the transfer housing and for conducting cooling shaped articles held therein, the complementary cooling device being movable relative to the cooling housing for detecting the at least one housing side of the complementary cooling position; and f) a parts removal mechanism disposed at least partially below the housing axis for receiving molded articles released from the at least one housing side in the unloading position.
[16]
16. The machine of claim 15, wherein the cooling housing has two sides, one side engageable with the output plate, and the other side simultaneously engageable with the complementary cooling device.
[17]
17. The machine of claim 16, wherein the transfer pins are provided with suction channels connected to a vacuum source, wherein the suction channels draw airflow through a space between an inner surface of the molded articles and an outer surface of the transfer pins, the air flow forming an inner surface of the molded Cooling objects by convection, simultaneously with the conductive cooling, according to the respective cooling sleeves.
[18]
18. A method of cooling shaped preforms, comprising: a) transferring preforms of a first injection cycle from a mold to engage an output plate, the preforms having outer surfaces and inner surfaces to be cooled; b) contacting the delivery plate and a transfer case with the transfer case removed from the mold; c) releasing the preforms from the delivery plate and transferring the preforms to a retaining engagement on the transfer case; d) merging a supplemental cooling device and the cooling housing; e) releasing the preforms from the transfer housing and transferring the preforms for retaining engagement with the supplemental cooling device; and f) releasing the preforms from the supplemental cooling device and transferring the preforms back to the retaining engagement on the transfer housing.
[19]
19. The method of claim 18, further comprising after step f) g) aligning the transfer housing in an unloading position; and h) ejecting the preforms from the cooling housing.
[20]
20. The method of claim 19, further comprising receiving the ejected preforms with a parts removal mechanism disposed below the cooling housing.
[21]
21. The method of claim 20, wherein step a) comprises introducing the preforms into the cooling sleeves fixed to the delivery plate, the outer surfaces of the preforms engaging the inner surfaces of the cooling sleeves when the preforms are in holding engagement with the delivery plate.
[22]
22. The method of claim 18, wherein the outer surfaces of the preforms are conductively cooled while the preforms are in holding engagement with the additional cooling device.
[23]
A method according to any one of claims 18 to 22, wherein step e) comprises loading the preforms into the complementary sleeves fixed to the supplemental cooling means, the outer surfaces of the preforms engaging the inner surfaces of the complementary sleeves when the preforms in holding engagement with the supplemental cooling device.
[24]
24. The method of claim 18, further comprising convectively cooling the inner surfaces of the preforms during a period of time that elapses between completing step b) and initiating step c).
[25]
25. The method of claim 18, further comprising convectively cooling the inner surfaces of the preforms for a time period extending at least between the completion of step d) and the initiation of step e).
[26]
26. The method of claim 25, wherein the convective cooling includes introducing a convective airflow along the inner surfaces of the preforms.
[27]
27. The method of claim 26, wherein steps c) and f) comprises inserting transfer pins into the interior of the preforms, the transfer pins being fixed to the transfer housing and having inner fluid channels in conductive communication with the convective airflow.
[28]
28. The method of claim 27, wherein the inner fluid channels have a proximal opening in the region of the transfer housing for communicating with a chamber in the transfer housing, and a distal opening spaced from the proximal opening for communicating with an interior of the preforms when the pins are therein and a suction force is applied to the proximal openings to draw ambient air into the preforms.
[29]
29. A method of cooling shaped preforms, comprising: a) transferring a set of first preforms of mandrel pins of a mold for holding engagement within a set of first cooling sleeves of an output plate; b) bringing together the output plate and a transfer housing, wherein the transfer housing takes a distance from the mold; c) inserting a set of first transfer pins of the transfer housing into the first preforms and forcing a flow of air through the first pins to cool the inner surfaces of the preforms while the preforms are in holding engagement with the first cooling sleeves; d) releasing the first preforms from engagement with the cooling sleeves and transferring the first preforms for retaining engagement with the transfer housing; e) positioning the preforms in a first set of second cooling sleeves of a supplemental cooling device while the preforms are in holding engagement with the transfer housing; f) transferring the preforms out of engagement of the transfer housing into a retaining engagement within the second cooling sleeves; g) pressing an airflow against the inner surfaces of the preforms while the preforms are in holding engagement with the second cooling sleeves; h) releasing the preforms from holding engagement within the second cooling sleeves and transferring the preforms back to the retaining engagement with the transfer housing; i) separating the transfer housing from the supplemental cooling device; and j) ejecting the preforms from the transfer housing.

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同族专利:

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公开号 | 公开日

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US20140374956A1|2014-12-25|

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WO2013134874A1|2013-09-19|

---

AT514631B1|2016-06-15|

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CN104254436A|2014-12-31|

---

DE112013001398T5|2014-12-11|

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US10213946B2|2019-02-26|

---

US20190152108A1|2019-05-23|

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CN104254436B|2017-09-01|

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法律状态:
2019-07-15| HC| Change of the firm name or firm address|Owner name: NIIGON MACHINES LTD., CA Effective date: 20190611 |

优先权:

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申请号 | 申请日 | 专利标题

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US201261609777P| true| 2012-03-12|2012-03-12|

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PCT/CA2013/050185|WO2013134874A1|2012-03-12|2013-03-12|Post-mold cooling injection molded articles|

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