• 专利附录
  • 专利说明
  • 权利要求
  • 类似技术
  • 同族专利
  • 引用文献
  • 法律状态
  • 优先权
    • 专利摘要:
    Injection molding machine (1) comprising a multi-stage mold (2) having a first outer mold part (3), a central block (5) mounted to rotate or pivot and a second outer mold part (4 ), the outer mold parts (3, 4) respectively having a distribution plate (8), mold plates (10a, 10b) and mold cavities and forming regions on the mold plates (11a, 11b) ) on opposite outer sides of the central block (5).
    公开号:BE1022053B1
    申请号:E2013/0305
    申请日:2013-05-06
    公开日:2016-02-10
    发明作者:Ulrich Zahoransky
    申请人:Zahoransky Formenbau Gmbh；
    IPC主号:
    专利说明:

    The invention relates to an injection molding machine comprising a stage mold for manufacturing injection molded parts, which has a first outer mold part, a rotational or pivotally mounted central block, and a second outer mold part, the outer mold parts respectively having a distribution plate with a hot runner distributor for the material to be injected and mold plates that can be arranged on the distribution plate, and mold cavities being formed between forming areas on the inner sides of the mold plates of the outer mold parts and forming areas on mold plates on opposite outer sides of the central block and at least one clamp disposed offset in the direction of rotation or pivoting the central block relative to the outer mold parts to remove and hold a injection molded part or injection molded part.
    Such step molds are known in many embodiments for producing, for example in two planes on a single injection molding machine, double injection molded parts, for example toothbrush bodies, brush bodies, and the like. general or razor handles but also any other injection molded parts. In an improvement of these step molds, the central block is rotatable so that it is possible to manufacture a two-component injection molded part on an injection molding machine by first molding a preform in a plane, by rotating the central block or a part thereof with the preform in another plane and finishing the molding. Such cubic molds are known for example from DE 101 21 691 A1. Double-cube injection molding machines are already known, for example from document WO / 2005/077637 A1 or US Pat. No. 7081222 B2, in which two injection-molded partial parts are manufactured on two central blocks arranged on the same side. one next to the other, then are oriented towards each other after rotation of the central blocks and are connected to one another by the closing movement of the multi-stage mold.
    The problem with these known injection molding machines is that when replacing the mold plates for a model change in order to manufacture different injection molded parts on the same machine, the distribution plates with the channel distributors In addition, the heating points need to be replaced frequently, since the injection points of the different models are often different. This is complex and expensive.
    The purpose, therefore, is to provide an injection molding machine of the type mentioned at the beginning which allows a simple and inexpensive model change.
    The object of the invention is that the distribution plates of the outer mold parts are respectively arranged immobile, in that the mold plates of the outer mold parts and the mold plates of the central block are respectively retained on the part of outer mold or the central block, in that the mold plates of the outer mold parts can be positioned on the distribution plates corresponding to their respective feed channels and in that the mold plates of the central block can positioned on the central block corresponding to the position in question of the mold plates of the outer mold parts.
    The mold plates can be fabricated according to the desired injection points, regardless of the configuration of the distribution plates and their heating channel distributors which have a defined position and orientation on the injection molding machine. The mold plates of the outer mold portions are then individually oriented on their respective dispensing plates so that the hot runner distributors of the distribution plates and the feed channels of the mold plates are aligned with one another. There may be differences in position between the mold plates of different patterns in the horizontal direction as well as in the vertical direction.
    The mold plates of the central block are oriented thereon so that they are adapted to the position of the mold plate of the associated outer mold part.
    It is also possible that the mold plates of the second outer mold part are arranged offset from the mold plates of the first outer mold part. For example, the mold plates may be arranged vertically offset from each other so that an overmoulding may be applied at a predetermined location on first injection molded partial pieces. For this purpose, an outer mold part may be designed to mold base bodies of an injection molded part and the other outer mold part may be designed to apply another material component to the base body. It is thus possible to manufacture multi-component injection molded parts, for example toothbrush bodies with a special gripping area or generally two-color injection molded parts.
    It may be appropriate for the clamps to be positionably mounted. On the one hand, the clamps can be adapted to the mold mold moment position, in case the injection molded parts concerned require an exact picking position. On the other hand, the position of injection molded (partial) pieces removed from a mold plate can be corrected by a corresponding positioning of the clamp before they are placed back into another mold plate.
    By appropriate arrangement of the mold plates and corresponding positioning movements of the tongs, the injection molded partial pieces can be transferred in an offset manner into the mold plate for the second injection molding component. Corrections of horizontal and / or vertical positions as well as oblique positions are thus possible.
    To accommodate different injection molded parts, the clamps may have removable clamp jaws that may be replaced depending on the type of injection molded parts involved.
    It may be appropriate for at least one control unit to be provided to control injection molded parts or injection molded partial parts removed with a clamp of the central block. For example, injection molded partial parts made during a first injection cycle can be verified with a camera. When defects are noted, for example incomplete injection processes, the production flow can be interrupted to avoid the injection of a second component of material on the defective injection molded partial parts and thus a consumption of useless material. .
    An advantageous embodiment provides that at least one multifunction unit is provided for processing injection molded parts or injection molded partial parts removed from the central block. This multifunction unit can support a plurality of missions. The multifunction unit may, in particular, be designed to place a functional part on an injection molded part or an injection molded part, to bend an injection molded part, to cool, to keep warm, to rotate and / or shifting an injection molded part, for coating and / or cleaning an injection molded part or an injection molded part and / or for finishing an injection molded part.
    A functional part may be, for example, an additional object which may be encapsulated in whole or in part, for example another plastic part, a metal part, an inserted wooden part, a sheet, an electrical circuit or a transponder RFID.
    An injection molded partial part can be bent as a base body so that it is under mechanical tension when injecting a second material component. This can be useful for closing lids.
    A date code can also be applied, for example.
    Rotation of the brush body is also conceivable so that it can be rotated 180 ° in the mold plate for the second component of material.
    After removal of the finished injection molded part after the second injection process, coating and / or cleaning can be carried out or a date code can be applied in particular with the associated multifunction unit.
    The injection molded parts or the injection molded partial parts processed on the multifunction unit can also be checked with the control unit.
    During short injection cycles in particular, it is appropriate that the clamps are respectively multi-pliers. The mold plates are generally multiple molds for injection molding several pieces at the same time. These can be removed at the same time from the mold plate with the multi-pliers and the previously removed injection-molded partial pieces are placed in a corresponding mold plate for the second material component.
    In longer cycles, therefore, when more time is available to remove or insert injection-molded (partial) parts, a single clamp or a smaller multi-pliers can not grasp at the same time as part of the molded parts. injection can also be used and the injection molded parts are removed or inserted in portions one after the other.
    The clamps may preferably be gripping robots, in particular 6-axis robots or SCARA robots.
    Finished injection molded parts can be removed with the clamps of the relevant mold plate. However, it is also possible that ejector elements are provided in the region of the mold plates of the central block to eject finished injection molded parts.
    An idea of the invention provides that the mold plates are respectively designed to receive cassettes receiving at least partly injection molded parts or injection molded partial parts.
    The cassettes may respectively have receiving openings to receive tufts of hair in places. This allows the manufacture of brushes with tufts of bristles embedded in their anchoring region so that subsequent insertion of the tufts of bristles into the finished brush body is not necessary. The tufts of bristles provided with sealing plates placed in the cassettes can be coated.
    The clips may be correspondingly designed to grip the cassettes for insertion into the mold plates and to remove the cassettes with the injection molded (partial) pieces contained therein of the mold plates.
    All the center block mold plates can be provided to receive the cassettes or only the mold plates for the first injection molded partial pieces while these are separated from the cassette after removal from the respective mold plate and are inserted without cassette in the mold plate for the second component of material.
    In order to open and close the injection molds, the central block can be arranged motionless and the outer mold parts are respectively mounted in a linearly displaceable manner.
    Alternatively, one of the outer mold parts may be immobile and the central block and the other outer mold part are respectively mounted in a linearly displaceable manner.
    Exemplary embodiments of the injection molding machine according to the invention are explained below in more detail on the basis of the drawings.
    These show in a partially schematic manner in FIG. 1 is a perspective view of an injection molding machine according to the invention, FIG. 2 a view of the front side of the injection molding machine of FIG. 1, FIG. 3 a view of the longitudinal side of the injection molding machine of FIG. 1, FIG. 4 in fig. 7 respectively a perspective view of the injection molding machine in different phases of a treatment cycle, FIG. 8 is a perspective view of an injection molding machine with a central block mounted on the upper side and the lower side and FIG. 9 a view of the longitudinal side of the injection molding machine of Figure 8.
    An injection molding machine designated in its entirety by 1 according to FIG. 1 a step mold 2 for manufacturing injection molded parts 6. A fixed outer mold part 3, a central block 5 and a second part movable outer mold 4 are provided. The central block 5 and the movable outer mold part 4 are linearly displaceable between a closed position (Fig. 4-7) and an open position (Fig. 1, 3).
    In the open position, the central block 5 can pivot about an axis of rotation, a pivoting swing of 90 ° in one direction and during the next treatment cycle in the opposite direction being provided (arrowPfl, Figure 1).
    An injection device 7 for a distribution plate 8 with heating channel distributors 9 (FIG. 3) is associated with each of the outer mold parts 3, 4. Mold plates 10a, 10b are detachably mounted and positionable on the distribution plates 8. Correspondingly, mold plates 11a, 11b are removably and positionably mounted on the central block 5, the mold plates 10a 11a forming mold cavities for first injection molded partial pieces and mold plates 10b, 11b forming mold cavities for injection molded second partial pieces or for injecting a second material component onto the first molded partial pieces by injection.
    In the region of the free side of the central block 5 located outside, arranged offset from the outer mold parts 3, 4 in the direction of rotation of the central block 5, there is provided a clamp 12 designed as a multi-pliers with which parts injection molded partial pieces 6a or injection molded finished parts 6b can be removed from the mold plates 11a, 11b) and held.
    The distribution plates 8 are respectively arranged stationary in the direction of a fixed positioning of the hot runner distributors 9 during the injection. The distribution plate 8 of the movable mold plate 4 is movable only in the direction of movement between the open position and the closed position. The mold plates 10a, 10b can be respectively arranged on the distribution plates 8 according to their unrepresented feed channels. As can clearly be seen in FIG. 3, the mold plates 10a, 10b of the two outer mold parts 3, 4 can be arranged offset from one another. In the exemplary embodiment according to FIG. 3, the mold plates 10a, 10b of the two outer mold parts 3, 4 are vertically offset from one another by a difference d1. This measurement d1 represents the different clamping height of the mold plates 10a, 10b.
    For a better overview, the clamps 12 are not shown in FIG.
    The associated mold plates 11a, 11b of the central block 5 are also arranged offset from each other on the central block 5 in a corresponding manner so that they correspond with the corresponding mold plates 10a, 10b of the mold parts. outside 3, 4.
    The clamps 12 are also positionable to the same extent, which is indicated by the double arrow Pf2 in FIG.
    Due to the possibility of positioning the mold plates 11 ad, it is possible, on the one hand, to insert the injection-molded partial pieces 6a in an offset manner into the corresponding mold plates 11b of the central block 5 without absolutely having to reposition the ones after the kidnapping. A second material component can thus be applied in a desired position on the injection molded part and / or the injection point of the second material component can be placed in a desired position which can deviate from the injection point. for the first injection molded partial part 6a. On the other hand, during a model change, the relevant mold plates can be arranged on the distribution plates in a manner corresponding to their existing supply channels and the associated mold plates for the central block 5 are oriented on this so that different mold plates can be used on one and the same distribution plate 8 and that a change of the distribution plates 8 with the hot runner distributors 9 is not necessary.
    The clamps 12 are respectively disposed on a handling unit 13 which furthermore has a control unit 14, a multifunction unit 15 and a removal unit 16.
    The forceps 12 are respectively designed as double multi-pliers with a plurality of interchangeable, model-specific pliers 23. All the injection molded partial pieces 6a of an injection process can be removed from the respective mold plate 11a of the central block 5 with one side respectively. All finished injection molded parts 6b of an injection process can be removed respectively with the other side of the clamp 12.
    A clamp support 17 allows the clamp 12 to move in a horizontal, vertical plane as well as a rotation of the clamp 12.
    Due to the vertical orientation of the clamps 12, these are adapted to the position of the moment of the mold plates 11a, 11b, so that the part (part) injection-molded 6a, 6b concerned can be grasped in the position provided for this purpose.
    Different treatments of the injection-molded partial pieces 6a or the injection-molded finished parts 6b can take place on the multifunction unit 15, these injection-molded parts being for example able to be cooled, kept hot, cleaned, coated, bent, turned or staggered. . It is also possible to apply additional distinguishing marks or functional parts to the injection molded part 6b or the injection molded part 6a.
    With the control unit 14 which may be a camera for example, the injection molded parts 6a, 6b removed from the mold plates 11a, 11b or processed on the multifunction unit can be checked, particularly in terms of defects. injection or defective treatment by the multifunction unit 15.
    The finished injection molded parts 6b can be removed from the clamps 12 with the removal unit 16 shown only schematically. For this purpose, the removal unit 16 can move upwards and grasp and remove the injection molded parts 6b from below.
    Figures 4 to 7 show the injection molding machine 1 in different phases of a treatment cycle.
    In FIG. 4, injection molded partial parts 6a, here toothbrush base bodies, previously molded on the front handling unit 13 are processed on the multifunction unit 15. On the rear handling unit 13 contrast, injection molded end pieces 6b on which a second material component has been applied to the toothbrush base bodies during a previous injection process are removed from the clamp 12 with a removal unit 16. The injection molded partial pieces 6a held on the other side of the double multi-tongs of the rear handling unit 13 are checked with the control unit 14.
    The injection molded partial pieces 6a thus verified are then inserted according to FIG. 5 into the mold plates 11a of the central block 5 facing the rear handling unit 13. On the front handling unit 13, the injection molded partial pieces 6a previously processed on the multifunction unit 15 are checked with the control unit 14.
    During these processing steps, other partial pieces 6a are injection molded in the region of the fixed outer mold part 3 and injections on the injection-molded partial parts previously take place in the region of the outer mold part 4 .
    Then the outer mold part 4 and the central block 5 move into the open position, the central block is rotated 90 ° counterclockwise and the central block 5 and the outer mold part 4 are returned to the closed position.
    It is thus possible to make the arrangement according to FIG. 6 in which, on the front handling unit 13, the finished injection molded parts 6b previously in the region of the movable outer mold part 4 have been removed with the clamp 12 and are now removed from the clamp 12 by means of the removal unit 16. On the rear handling unit 13, the injection molded partial parts 6a previously in the region of the fixed outer mold part 4 have been removed with the clamp 12 and transferred to the associated multifunction unit 15.
    After treatment of the injection molded partial parts 6a on the multifunction unit 15, they are again gripped with the clamp 12 and brought to the control unit 14 (Figure 7) to check and control.
    On the front handling unit 13, the forceps 12, once again designed as a double multi-tongs, is rotated according to FIG. 7 by 90 ° in a clockwise direction and the injection-molded partial parts 6a previously verified are placed in the mold plates. 11b directed towards the clamp 12.
    A comparison of FIGS. 4 and 6 as well as 5 and 7 shows that the different steps on the two manipulation units 13 proceed in the same way but are respectively shifted from each other in time and the two handling units 13 can thus have the same construction.
    In an injection molding machine 1 according to FIGS. 1 to 7, a machine bed 18 and two spar supports 19 and four spars 20 are each provided. The second movable outer mold part 4 is mounted in a longitudinally displaceable manner. on the longitudinal members 20. The central block 5 is mounted on a rotary bearing 24 which can further be moved longitudinally to position the central block 5 between the open position and the closed position (Figure 3).
    Alternatively, the central block 5 can also be mounted on the longitudinal members 20 as shown in FIGS. 8 and 9. For this purpose, it is provided, according to FIGS. 8 and 9, an upper bearing and a lower bearing 21 which, on the one hand, are mounted longitudinally displaceable on the longitudinal members 20 and, on the other hand, respectively have a bearing axis 22 on which the central block 5 is rotatably mounted.
    An assembly of the central block 5 on one side would also be possible so that only one of the bearings 21 would be necessary.
    As an alternative to the assembly shown in the figures with longitudinal members 20, the injection molding machine 1 can also be designed without a spar.
    In the region of the outer mold portions 3, 4, injection molded (partial) pieces with different properties such as, for example, color or material may also be molded at the same time. For this purpose, a plurality of injection members may be respectively provided in the outer mold parts 3, 4. On the other hand, it is possible that the mold plates on one side of the central block which are arranged respectively on the above the figures in the figures are designed differently and that, for example, brush base bodies are molded into the lower mold plates as the first injection molded partial parts, that these are then transferred by the clamps into the upper mold plates on the same side of the central block to apply a first injection on the basic bodies. Then, these can be removed from the corresponding mold plates with a base body provided with a first injection and after pivoting of the central block be placed in correspondingly designed mold plates to make a second injection and optionally to a third injection. By rotating the moldings around their longitudinal axis, injections can also be applied to different sides of the base body. Corresponding injection members are respectively provided on the outer mold parts.
    权利要求:
    Claims (15)
    [1]
    claims
    An injection molding machine (1) comprising a step mold (2) for producing molded parts, which has a first outer mold part (3), a central block (5) rotatably or pivotally mounted, and a second outer mold part (4), the outer mold parts (3, 4) respectively having a distribution plate (8) with a hot runner distributor (9) for the material to be injected and mold plates ( 10a, 10b) being disposable on the distribution plate (8) and mold cavities being formed between forming areas on the inner sides of the mold plates (10a, 10b) of the outer mold parts (3, 4) and forming zones on mold plates (11a, 11b) on opposite outer sides of the central block (5), and at least one clamp (12) arranged offset in the direction of rotation or pivoting of the central block (5). ) with respect to the outer mold parts (3, 4) in for removing and holding an injection-molded part (6b) or an injection-molded part (6a), characterized in that the distribution plates (8) of the outer mold parts (3, 4) are respectively arranged immobile, the mold plates (10a, 10b) of the outer mold parts (3, 4) and the mold plates (11a, 11b) of the central block (5) are respectively releasably retained on the outer mold part ( 3, 4) or the central block (5), in that the mold plates (10a, 10b) of the outer mold parts (3, 4) can be positioned on the distribution plates (8) according to their channels. respective feed plates and in that the mold plates (11a, 11b) of the central block (5) can be positioned on the central block (5) depending on the position of the mold plates (10a, 10b) of the parts of the outer mold (3, 4).
    [2]
    Injection molding machine according to claim 1, characterized in that the mold plates (10b) of the second outer mold part (4) are arranged offset with respect to the mold plates (10a) of the first part of the mold. outer mold (3).
    [3]
    An injection molding machine according to claim 1 or 2, characterized in that an outer mold part (3) is designed to mold the basic bodies of an injection molded part (6b) and the other part outer mold (4) is adapted to inject another material component onto the base body.
    [4]
    Injection molding machine according to one of claims 1 to 3, characterized in that the clamps (12) are mounted in a positionable manner.
    [5]
    5. Injection molding machine according to any one of claims 1 to 4, characterized in that the clamps (12) have removable clamp jaws (23).
    [6]
    Injection molding machine according to one of claims 1 to 5, characterized in that at least one control unit (14) is provided for controlling injection molded parts (6b) or molded partial parts. injection (6a) removed from the central block (5) with a clamp (12).
    [7]
    Injection molding machine according to one of claims 1 to 6, characterized in that at least one multifunction unit (15) is provided for treating injection molded parts (6b) or injection molded partial parts. (6a) removed from the central block (5).
    [8]
    An injection molding machine according to claim 7, characterized in that the multifunction unit (15) is adapted to apply a functional part to an injection molded part (6b) or an injection molded part (6a), for bending an injection molded part (6a), for cooling, for holding hot, for rotating and / or for shifting an injection molded part (6a), for coating and / or cleaning an injection molded part (6b) or an injection molded part (6a) and / or for finishing an injection molded part (6b).
    [9]
    9. Injection molding machine according to any one of claims 1 to 8, characterized in that the clamps (12) are respectively multi-pliers.
    [10]
    10. Injection molding machine according to any one of claims 1 to 9. characterized in that the clamps (12) are respectively gripping robots.
    [11]
    Injection molding machine according to one of claims 1 to 10, characterized in that in the region of the mold plates (11a, 11b) of the central block (5), ejection elements are provided for eject injection molded finished parts (6b).
    [12]
    Injection molding machine according to any one of claims 1 to 11, characterized in that the mold plates (10a, 10b, 11a, 11b) are respectively designed to receive cassettes receiving at least part of the molded parts. by injection (6b) or injection molded partial parts (6a).
    [13]
    13. Injection molding machine according to claim 12, characterized in that the cassettes respectively have receiving openings for receiving at least in places tufts of bristles.
    [14]
    14. Injection molding machine according to any one of claims 1 to 13, characterized in that the central block (5) is immobile and the outer mold parts (3, 4) are respectively mounted linearly displaceable.
    [15]
    Injection molding machine according to one of claims 1 to 13, characterized in that one of the outer mold parts (4) is arranged stationary and in that the central block (5) and the other part outer mold (3) are respectively mounted in a linearly displaceable manner.
    类似技术:
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    同族专利:
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    法律状态:
    2019-01-30| FG| Patent granted|Effective date: 20160210 |
    2019-01-30| MM| Lapsed because of non-payment of the annual fee|Effective date: 20180531 |
    优先权:
    申请号 | 申请日 | 专利标题
    DE102012008939A|DE102012008939A1|2012-05-08|2012-05-08|injection molding machine|
    DE102012008|2012-05-08|
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