• 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:
    The invention is a mold (100) for a plastic tube making device comprising a stationary body (2), roller-shaped rolling members (1.1) supported on the body by supporting members (3), adapted to move the plastic tube axially, further comprising at least four chain devices (1) (1`) consisting of said rolling members and joints between them (1.4) and wherein each chain is adapted to rotate at least two sprockets (1.2, 1.3) and each joint is supported by ends of its axis (1.6) on at least two similarly shaped guides (1.7) arranged to control said chain rotation and the guides of each chain device comprising at least one substantially parallel portion of the mold center axis (C) and the center axes of the rolling members at the same center axis of the mold and said rolling members being adapted to contact or against the outer surface during the manufacture of the plastic tube and at least one of the sprockets of each chain device is adapted to drive the chain and rotate by rotating its axis about its axis in such a direction that the rolling members in the above position
    公开号:FI20175740A1
    申请号:FI20175740
    申请日:2017-08-18
    公开日:2019-02-19
    发明作者:Seppo Takala
    申请人:Plastic Pipe Mobile Ou；
    IPC主号:
    专利说明:

    MANUFACTURE OF THE PLASTIC PIPE INSTALLATION SHAPE AND METHOD OF USING IT
    20175740 prh 18 -08- 2017
    The present invention relates to a mold for a plastic tube making machine and a method for operating it. Said mold comprises a supported body and roll-supported rolling members supported on the body and adapted to move the plastic tube axially during its manufacturing process.
    The invention is directed to processes for manufacturing large plastic tubes. Large shaped levers with internal diameters ranging from 1000 mm to 6000 mm and even larger are manufactured for use in mm. in the manufacture of large tanks, sewer pipes, bridge drums, plumbing pipes, etc. The most advanced manufacturing technique for these pipes is based on rotating the plastic tape or profile by a step corresponding to the width of the tape / profile and welding the watertight screw joint.
    Prior art roll-forming molds are formed such that the rolls are rolls of substantially length and substantially parallel to the central axis of the mold and the pipe to be manufactured and form a circumference where the periphery of the inner surface of the finished plastic tubing around the rollers 20 is in contact.
    The rollers are set to rotate about their central axes so that the feedable plastic strip / profile and rotating graduated tube scroll over the rollers.
    One embodiment of the invention is to use the novel inventive application of the metal strip technology 25 per se as a support layer on the mold. This is particularly true when producing a thin-walled tube or an inner layer of a multi-layer tube using a mold according to the invention.
    WO 2014/080077 A1 discloses one solution such as the roller technology of the first one described above. The rollers 2, 3 are parallel to the center line of the plastic pipe to be completed and the plastic pipe is completed on them. The resulting tube is forced into a process direction movement at the tube completion rate by the radial rollers 10 of the mold.
    20175740 prh 18 -08- 2017
    PCT / JP88 / 01258 discloses another solution, in which the rollers 21a forming the periphery of the mold are set at a certain angle with respect to the center line of the mold. This arrangement causes the resulting plastic tube to move axially in its direction of completion without the radial pressure rollers used in the solution of the preceding paragraph.
    US 4081302 discloses a solution based on the aforementioned metal tape technology. The continuous loop-like steel strip is recycled over the mold and the fiberglass tube is fabricated on the layer formed by this strip. As the mold 10 rotates, this tapered ribbon moves the finished tube with it. The tape is set to return through the swivel castors back to the beginning of the mold.
    The major drawbacks of the prior art disclosed in WO 2014/080077 A1 relate to the fact that the radial rollers 10 exert a variable pressure of 15 on the weld, making it more difficult to obtain a consistent weld. The longer the pipe is completed, the greater its rotational resistance and pressure in the weld.
    The major disadvantage of the mold disclosed in PCT / JP88 / 01258 is that it slides between the surface of the tube in contact with its 20 rollers and the surfaces of the rolls. Moving a graduated plastic tube requires that the transfer device be able to move the tube accurately at the tube completion rate. Em. the slip causes disruption to the pipe manufacturing: the pipe does not move sufficiently in a given time unit and the displacement does not correspond to the ascent. This disadvantage leads to e.g. continuously adjusting the position of the welding head 25.
    These solutions to the above-mentioned drawbacks have been addressed by the solution disclosed in FI 20160045. The key idea of this solution is to add a separate transfer device to the mold extension that moves the plastic tube at its completion rate without sliding between tube 30 and transfer device.
    The disadvantage of this solution, which in itself is advanced over the prior art, is its challenging structure. It has two separate devices and the entire device including the transfer device is adapted to rotate with the plastic tube.
    20175740 prh 18 -08- 2017
    It is an object of the present invention to provide a mold for a plastic tube making device and a method for using it which avoids the disadvantages of the prior art. The solution according to the invention is characterized by what is stated in the characterizing parts of claims 1 and 9.
    One of the greatest advantages of the present invention over the prior art is that there is no slippage between the rolling members of the mold moving the finished tube and the inner surface of the plastic tube in contact therewith.
    The above advantage has the specific advantage that the conditions of the weld seam produced by extruder welding can be kept constant during its cooling. Preventing seam compression and stretching, i.e. the axial movement of the pipe and preventing shrinkage in the radial direction only.
    There are many practical benefits of the above-mentioned benefits: dimensionally accurate and consistent welding, no need for calibration of the welding head, mold design and operation limits on the length of the pipe to be completed.
    Throughout this document, the term "" rolling element "means a roll, roll, ball, etc. arranged to rotate with respect to the centerline of its rolling surface.
    The term "plastic tape" as used herein refers to a strip or profile made of a plastic raw material that can be wrapped around or inside the mold to form a tube or portion thereof.
    The invention will be described in more detail in the accompanying drawings, in which Fig. 1 illustrates an arrangement in which a mold according to the invention is operative, Fig. 2, a side view of the above arrangement, Fig. 3, a three-dimensional Fig. 5 illustrates a mold according to the invention in a three-dimensional view, Fig. 6 shows the aforementioned mold viewed from its end,
    Figures 7 and 8, showing another embodiment of the mold according to the invention, Figures 9 and 10 show an embodiment of the mold according to the invention in which the mold is outside the pipe.
    The structure and operation of a preferred embodiment of the invention in the process of manufacturing a plastic tube will now be described with reference to the above figures.
    Figures 1 and 2 illustrate an assembly for producing a plastic tube 200 with a mold 100 according to the invention. The plastic tube produced in this example is a thick-walled 10 pressure tube and is made of plastic tape 30 which is tangentially and incrementally applied to a screw thread joint is formed. When this seam is welded, weld 31 provides a watertight connection. The outermost portion of the mold 100 inside the finished plastic tube consists of a circularly spaced circumferential ket15 device 1 which is rigidly supported on the tubular mold body 2 in the center of the mold by support members 3. The body 2 is concentric with the finished plastic tube 200 and supported. The chain gear, body and plastic tube share a common central axis C.
    Figures 3 and 4 show said chain device 1 in more detail. The chain device comprises rolling members 1.1 connected to the chain and joints 1.4 therebetween, and the thus formed chain of rolling members Γ is arranged around the first and second sprockets 1.2, 1.3 to rotate them. The chain is adapted to be folded from the joints 1.4 between adjacent rolling members by means of chain wheels 1.2, 1.3. Part of the rolling members 1.1, 25, which in this example are rollers, are always in the chain longitudinally of the plastic tube 200 (direction of the center axles of the rollers 1.5) and all the rolling members are arranged to rotate freely about their central axes 1.5. In each case, the opposite ends of the center shafts 1.5 of two successive rolling members are connected to a joint 1.4 between them, and the joint is supported by a chain 1.6 on chain guides 1.7 on the sides of the rolling members so that the guide members support the rolling members At the ends of the shafts 1.6 there are grooved rollers 1.8 which are moved by the guides 1.7. The first and second sprockets 1.2, 1.3 are arranged to rotate about their central axis 1.2.1, 1.3.1 and at least one of the sprockets 1.2, 1.3 is arranged to rotate by mechanical power at a speed such that
    20175740 prh 18 -08- 2017 Rolling members 1.1 in contact with the inner surface of the plastic tube 200 move at the process speed of the plastic tube 200 in its direction of completion.
    Figures 5 and 6 show an embodiment of a mold 1 according to the invention. The body 2 of the mold 5 is a horizontal tubular member and is supported in place on the plastic tube manufacturing site structures 300 from the first end A of the supply side of the plastic rib 30. The chain members 1 are centered circumferentially around the body 2 and supported by the body the outer diameter dl of the mold 100 is adjustable and this adjustment is made by adjusting the length of the adjustable support members 3. In addition, each chaining device 1 is connected to adjacent chaining devices by a connecting device 4. In this example, the connecting devices operate on a scissor principle, whereby they support the chaining devices in parallel. After adjustment, the chain devices 1 and the connecting devices 4 are locked in place.
    The above mold 100 according to the invention operates in the process of manufacturing the plastic tube 200 as follows:
    The mold 100 is fed to the mold 100 tangentially and inclined therewith at an angle α relative to the normal axis of the core and the resulting tube C, and rotates about an outer circumference formed by the rolling members 1.1 of the outer members 1.1 of the chains 1 '. The slope h of the plastic strip 30 having a width a is chosen such that the opposite sides of adjacent turns are joined by a screw thread seam and in welding this seam, which may be e.g. V or X, the weld 31 forms a plastic tube 200. from the outside or simultaneously on both sides and the welding method determines the seam shape to be used.
    At the same time as the feeding of the plastic tape 30 is started, the chain devices 1 are set to rotate at least one of the sprockets 1.2, 1.3 along their axis by machine speed such that the part opposite the plastic tube of the chain link 1 'moves with the aforementioned plastic tube. The outer diameter d1 of the mold 100 defines the inner diameter D1 of the resulting plastic pipe and the rolling members 1.1 of the above-mentioned chain section rotate about their central axes 1.5 by machine force about their longitudinal axis
    20175740 prh 18 -08- 2017 rotated by inner surface 200.1 of rotatable finished plastic tube 200. Simultaneously, said chain section rolling members 1.1, which are pressed against the inner surface 200.1 of the plastic tube, move the plastic tube in the direction C of the Senja mold and move in the direction of completion of the tube at its completion speed. The clamping force of the rolling members 5 1.1 against the inner surface of the tube is adjusted so that there is no slippage between said parts.
    The plastic tube 200 may be manufactured with the mold 100 of the invention continuously in any desired amount. Various pipe handling devices can be connected to the production line, such as, for example, a cutting device.
    Figure 7 illustrates an embodiment of the invention using a support layer 5 on top of the mold 100. In the manufacture of a thin-walled plastic tube, such as the inner layer of a multi-layer tube, it may be necessary to support the circumference In this embodiment of the invention, the support layer 5 is composed of two strips 5.1, 5.2 fed in parallel on the mold. The strips are fed to the mold tangentially and incrementally so that the two strips adhered to one another form a solid layer on the mold. The slope pair h1 is the common width b + b of the two bands divided by 20 cosin (2 * b / cos a) of the feed angle. The strips 5.1, 5.2 are endless loops and are wound from one end B of the mold 100 through the pivoting members 6, through the opening 2.1 of the body 2 and further through the pivoting members 7 and 8 back onto the mold at its first end A. The pivoting members 6-8 may be rotate.
    In Fig. 8, a plastic strip 30 having a width substantially equal to the total width b + b of the strips 5.1 and 5.2 is supplied on a support layer 5 formed by a pair of straps rotating on the mold. The screw thread seam between the plastic tape turns is welded and the weld 31 forms a watertight joint. Said pair of ribbons and the plastic ribbon may be arranged to overlap or to a certain gradation relative to one another.
    More than two ribbons 5.1, 5.2 .. can also be matched. The use of two or more strips 5.1, 5.2, etc. differs from the prior art single strip technique in that the width of the strips does not set limits to the height of the elevation h1, since the high elevation strips can be returned to the first end A of the mold separately,
    20175740 prh 18 -08- 2017 so that the treatment of the tapes with the turning members 6- 8 will not cause any problems. In the manufacture of plastic tubes 200, it is common for the pitch h to be significantly greater than the pitch used for glass fiber tubes manufactured using conventional strip technology (single strip).
    The strips 5.1, 5.2 can be made, for example, of steel.
    Figures 9 and 10 show an embodiment of a mold 100 according to the invention in which the chain devices 1 are placed around a circular plastic pipe 200, whereby the plastic pipe is made inside the mold 100. The inner diameter d2 of the mold is the smallest of the rolling members 1.1. the diameter of the circle formed through the surfaces and defines the outer diameter D2 of the plastic tube 200. In this example, there are nine chain units. The plastic tape 30 is fed tangentially to the inner diameter d2 of the mold so that the opposite sides of the adjacent turns of the tape are positioned against the rolling members as they rotate against each other and a screw seam is formed between the turns. The weld 31 is formed in this seam from the inside of the plastic tube 200. It may also be formed, at least in part, from the outside. A pressure is applied between the rolling members 1.1 and the outer surface 200.2 of the plastic tube to prevent slipping between them. In this embodiment of the invention, the mold body 2 is disposed outside the chain 20 of the device periphery and secured to the structures of the manufacturing site of the plastic tube 200.
    300. The chain devices are supported on the frame by support members 3. The inner diameter d2 of the mold can be adjusted by increasing or decreasing the circumference of the chain devices and thereby producing plastic tubes 200 of various sizes.
    With this embodiment of the invention, multi-layer plastic tubes can be manufactured. Additional layers are made inside the previously made layers.
    The plastic tube 200 formed inside the mold 100 receives a rotational movement from the thrust of the plastic tape 30 and / or can be rotated by machine force such as, for example, the inside wheels 30.
    The inventive use of the bands 5.1, 5.2 described above can also be applied to the production of the plastic tube 200 inside the mold 100. In this solution, said strips are fed against the rolling members 1.1 on their inside and the strips pa
    20175740 prh 18 -08- 2017 is boarded with the above-mentioned pivoting members from the second end B of the mold 100 to its first end A. The plastic tape 30 is then fed inwardly against the inside of the support layer 5.
    The rolling members 1.1 can be implemented in rolls, rolls or even balls. It is essential for them that their rolling surfaces contacting the inner / outer surface of their plastic tube are capable of rolling at substantially the same peripheral speed as the inner / outer surface of said tube. The number of rolling members in the chain Γ can be implemented per device.
    The sprockets 1.3 may be coupled to drive the sprocket chain by any known means. An example is a sprocket groove suitable for articulating shafts 1.6 and their distribution. The number of sprockets in the sprocket device can be implemented individually and at least one sprocket 1.2 is fitted as a drive wheel. One preferred embodiment of the invention is to set the second sprocket 1.3 which is rearward in the driving direction of the plastic tube 200 as a drive wheel.
    The rotational force of the sprocket 1.3 and the transmission of the force to the sprocket can be implemented in the device according to the invention in any known manner. An example is an electric hub motor.
    A chain tensioner can be fitted to the chain 1 ', whereby the tension of the stretched chain can be kept as desired. The chain tensioner may have an automatic function.
    The number of chain devices 1 can be any suitable for the situation. An example of their number is 4 to 20. However, this is not limited to their number. Likewise, the size of the chain device 1 and its parts can always be adapted to a particular manufacturing process.
    The length of the mold 100 can be made individually. A shorter mold operates in the manufacture of a single-layered pipe, and a longer mold can be used in the manufacture of a multi-layered plastic pipe, whereby all pipe layers can be added to the pipe on or in the mold. An example of a multilayer tube is a plastic tube with a reinforcing layer.
    The radial displacement of the mold 1 of the chain devices 1 when changing the outer / inner diameter d1 / d2 of the mold can also be accomplished in some other way than that shown in one of the above examples. The adjustment can, for example, be automated so that all the units are moved at the same time.
    The parallelism of the chain devices 1 can also be ensured in some other way than that shown in the above example. In the case of the illustrated scissor device, the other ends of the scissors move when moving the chain devices, e.g. in grooves 10 arranged thereon, allowing mutual movement of the Saxon parts and can then be locked in a certain position. The other ends of said parts can then be hinged.
    It is to be noted that, while this description adheres to one embodiment of the invention which is advantageous to the invention, it is by no means intended to limit the use of the invention to this type of example only, but many modifications are possible within the inventive concept defined by the claims.
    权利要求:
    Claims (9)
    [1]
    The claims
    A mold (100) for forming a plastic tube and comprising;
    5 a. In place of supported frame (
    [2]
    2)
    b. roller-shaped rolling members supported on the body by supporting members (3) and adapted to move the plastic tube axially during its manufacturing process, characterized in that:
    c. it comprises at least four chain devices (1) each of which has a chain (Γ)
    10 mentioned by said rolling members (1.1) and the joints between them (1.4),
    d. each chain (Γ) being adapted to rotate at least two sprockets (1.2, 1-3),
    e. each link (1.4) is supported by its axis (1.6) at the ends of said axis on at least two rails (1.7) adapted to guide said chain
    15 (Γ) rotations,
    f. the guides (1.7) of each chain device comprise at least one substantially parallel portion of the mold center axis (C) and the center shafts (1.5) of the rolling members (1.1) adjacent these portions are in line with the mold center axis (C);
    20 against the inner surface (200.1) or outer surface (200.2) of the lever tube (200) during the manufacture of said tube,
    g. at least one of the sprockets (1.2, 1.3) of each chain device (1) being arranged to drive the chain (Γ) and to rotate by rotating its axis about its axis in such a direction that in the position defined by f)
    The rolling members (1.1) 25 are able to move in the direction of completion of the plastic tube (200) at its rate of completion and thereby move the plastic tube, said mold being adapted to operate inside or outside the plastic tube (200).
    Mold (100) according to Claim 1, characterized in that it has an outer diameter (d1) or an inner diameter (d2) which is adjustable in size.
    of
    20175740 prh 18 -08- 2017
    [3]
    Mold (100) according to Claim 2, characterized in that the outer diameter (d1) or the inner diameter (d2) is adapted to be adjustable by manually or automatically adjusting the length of the support members (3).
    [4]
    Mold (100) according to Claim 1, 2 or 3, characterized in that an opening (2.1) extending longitudinally through it is arranged in the body (2).
    Mold (100) according to Claim 4, characterized in that a supporting layer (5) is provided on the outside or inside diameter (d1, d2) of the mold;
    10a. Consisting of at least two adjacent loop-like straps (5.1, 5.2) arranged to rotate said circumference with a pitch which produces a dense layer on the mold surface,
    b. said strips being adapted to return from the other end (B) of the mold (200) through the pivoting members (6, 7, 8) and the opening (2.1) of the body 15 to the first end (A) of the mold for feeding tangentially back onto or into the mold .
    [5]
    Mold (100) according to one of Claims 1 to 5, characterized in that the rolling means (1.1) are rolls or balls having an axis (1.4).
    [6]
    Mold (100) according to one of Claims 1 to 6, characterized in that the sprockets (1.2, 1.3 ..) are connected to the chain (Γ) with the axes (1.6) of the grooves and joints therein.
    25
    [7]
    Mold (100) according to claim 7, characterized in that a hub motor or other power source according to the prior art is connected to the drive sprocket.
    [8]
    A method of operating a mold (100) of a plastic tube making device for supporting and transferring a plastic tube (200) to be produced in the direction of its center axis (C) in the direction of its completion, characterized in that a mold according to any one of claims 1-8 is used.
    [9]
    Method according to claim 9, characterized in that it produces one or more layers of plastic pipe (200) either inside or outside the mold and that the inner diameter of this plastic pipe is at least one meter.
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    同族专利:
    公开号 | 公开日
    US20200230902A1|2020-07-23|
    FI128352B|2020-03-31|
    WO2019034806A1|2019-02-21|
    引用文献:
    公开号 | 申请日 | 公开日 | 申请人 | 专利标题
    DK115883B|1968-05-14|1969-11-17|P Poulsen|Apparatus for helical winding of a strip forming a traveling surface on a winding mandrel, with a pitch corresponding to the bandwidth.|
    CH609908A5|1976-11-03|1979-03-30|Dunlop Ltd|Device for continuously forming a cube by winding a tape onto a mandrel|
    JPH0761678B2|1986-10-11|1995-07-05|清治 永吉|Resin pipe manufacturing equipment|
    US6495792B1|1998-11-13|2002-12-17|Elpatronic Ag|Method and device for positioning edges, especially in tube welding|
    CN204526129U|2015-02-27|2015-08-05|高唐县德文钢塑有限公司|The process units of double-deck heavy caliber polyvinyl chloride winding pipe|
    法律状态:
    2020-03-31| FG| Patent granted|Ref document number: 128352 Country of ref document: FI Kind code of ref document: B |
    优先权:
    申请号 | 申请日 | 专利标题
    FI20175740A|FI128352B|2017-08-18|2017-08-18|Mould for an apparatus for producing plastic tubes and method for using the same|FI20175740A| FI128352B|2017-08-18|2017-08-18|Mould for an apparatus for producing plastic tubes and method for using the same|
    US16/640,038| US20200230902A1|2017-08-18|2018-08-01|A mold for an apparatus to produce plastic pipe and method to use it|
    PCT/FI2018/050563| WO2019034806A1|2017-08-18|2018-08-01|A mold for an apparatus to produce plastic pipe and a method to use it|
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