A double-row dog tooth type small-diameter PPEK rod extrusion die and an extrusion device

Abstract

The application relates to a double-row canine type small-diameter PPEK rod extrusion die and an extrusion device, and relates to the field of rod processing. The double-row canine type small-diameter PPEK rod extrusion die comprises a die shell, a feeding port, a hanger flow channel, an upper row of extrusion flow channels and a lower row of extrusion flow channels. The upper row of extrusion flow channels and the lower row of extrusion flow channels are located on the same side of the hanger flow channel. The feeding port is communicated with the hanger flow channel. The upper row of extrusion flow channels and the lower row of extrusion flow channels are both communicated with the hanger flow channel. The upper row of extrusion flow channels comprises a plurality of upper extrusion flow channels. The lower row of extrusion flow channels comprises a plurality of lower extrusion flow channels. The upper extrusion flow channel and the adjacent two lower extrusion flow channels are in triangular distribution. The upper extrusion flow channel can be inserted between the adjacent two lower extrusion flow channels. A plurality of sizing pipes are communicated with the upper row of extrusion flow channels and the lower row of extrusion flow channels in one-to-one correspondence. A cooling mechanism is sleeved on the plurality of sizing pipes. The application has the effect of improving the production capacity of small-diameter PEEK rods.

Description

TECHNICAL FIELD

[0001] The application relates to the field of rod processing, in particular to a double-row canine type small-diameter PPEK rod extrusion die and an extrusion device. BACKGROUND

[0002] PEEK is a kind of special engineering plastic with excellent comprehensive performance. It has excellent heat resistance, radiation resistance, chemical resistance, excellent mechanical properties and electrical insulation, and the metal ion content in the raw material is extremely low, which meets the requirements of purity in the semiconductor industry. Therefore, PEEK is widely used in the semiconductor industry, such as grinding rings for grinding wafers, carriers for carrying wafers, dispensing heads for packaging chips, and jigs for detecting chips. These precision parts need to be processed using PEEK rods of different diameters.

[0003] As shown in Figure 1 With Figure 2 In the related art, an extrusion die includes a die shell 10', a sizing pipe 20' and a cooling pipe 30'. The die shell 10' has a feeding port 11', a hanger flow channel 12' and six extrusion flow channels 13'. The feeding port 11' and the extrusion flow channel 13' are respectively arranged on both sides of the hanger flow channel 12'. The feeding port 11' and the extrusion flow channel 13' are in communication with the hanger flow channel 12'. The sizing pipe 20' is fixed to the die shell 10' and is in one-to-one correspondence with the plurality of extrusion flow channels 13'. The plurality of sizing pipes 20' are arranged in a row. The cooling pipe 30' is in one-to-one correspondence with the sizing pipe 20' and is used to cool the rod passing through the sizing pipe 20' by cooling water. After the rod is sized by the sizing pipe 20', it is positioned by the guide plate so that the rod can smoothly enter the track tractor.

[0004] When the extrusion die is matched with a 45-type single-screw extruder to produce PEEK rods of a certain size (such as φ50), the production per 24 hours is between 200kg and 300kg. However, when the size of the extrusion flow channel and the sizing pipe is changed to produce small-size rods (such as φ6), the production is only 9kg. Even if the number of extrusion flow channels is increased from 6 to 12, the production is only about 20kg. Due to the width limitation of the hanger flow channel, it is impossible to infinitely increase the number of extrusion flow channels. In practice, the width of the hanger flow channel is preferably within 500mm. When the width of the flow channel is greater than 500mm, the material distribution will be problematic, and dead material will appear on both sides of the edge of the die, which will affect the appearance of the rod or cause the extrusion to stop due to the blockage of the flow channel by the dead material. Therefore, it is urgent to design an extrusion die with high production capacity. SUMMARY

[0005] In order to improve the production capacity of small-diameter PEEK rods, the application provides a double-row canine type small-diameter PPEK rod extrusion die and an extrusion device.

[0006] In a first aspect, the application provides a double-row canine type small-diameter PPEK rod extrusion die, which adopts the following technical solutions:

[0007] A double-row canine type small-diameter PPEK rod extrusion die comprises:

[0008] A die shell has a feeding port for connecting an extruder, a hanger flow channel, an upper row of extrusion flow channels and a lower row of extrusion flow channels, the upper row of extrusion flow channels and the lower row of extrusion flow channels are located on the same side of the hanger flow channel, the feeding port is in communication with the hanger flow channel, the upper row of extrusion flow channels and the lower row of extrusion flow channels are both in communication with the hanger flow channel, the upper row of extrusion flow channels comprises a plurality of upper extrusion flow channels, the lower row of extrusion flow channels comprises a plurality of lower extrusion flow channels, and each upper extrusion flow channel is triangularly distributed with two adjacent lower extrusion flow channels, and each upper extrusion flow channel can be inserted between two adjacent lower extrusion flow channels.

[0009] A plurality of sizing pipes are arranged on the die shell and in one-to-one correspondence with the upper row of extrusion flow channels and the lower row of extrusion flow channels.

[0010] A cooling mechanism is sleeved on the plurality of sizing pipes to cool the rods passing through the sizing pipes.

[0011] By adopting the above technical solutions, the PEEK rods extruded by the upper row of extrusion flow channels and the lower row of extrusion flow channels can be arranged in a row under the limiting action of the guide grooves of the guide plates, so as to facilitate the entry into the caterpillar tractor during production and greatly improve the production capacity of small-diameter PEEK rods.

[0012] Optionally, the cooling mechanism comprises a box body sleeved on the plurality of sizing pipes, the box body has a cooling cavity, a water inlet and a water outlet, the water inlet and the cooling cavity are in communication with each other, the water outlet and the cooling cavity are in communication with each other, and the box body is sealingly connected with the sizing pipes.

[0013] By adopting the above technical solutions, the cooling water enters the cooling cavity through the water inlet, and the cooling water in the cooling cavity is cooled and then discharged through the water outlet, so as to realize the continuous cooling of the sizing pipes.

[0014] Optionally, the water inlet is arranged on the lower side of the box body, and the water outlet is arranged on the upper side of the box body.

[0015] By adopting the above technical solutions, the temperature of the condensate water at the lower end of the box body is low, and the temperature of the condensate water at the upper end is high, so as to achieve the best condensation effect.

[0016] Optionally, one side of the mold shell is provided with a flange plate, the flange plate is fixed relative to the mold shell, the sizing pipe is arranged on the flange plate, and the sizing pipe is fixed relative to the flange plate.

[0017] By adopting the above technical scheme, the sizing pipe is fixed on the mold shell through the flange plate, which is convenient to disassemble and assemble, and improves the disassembly and assembly efficiency of the sizing pipe.

[0018] Optionally, the end of the sizing pipe towards the mold shell is provided with a positioning ring, and the positioning ring is welded with the flange plate.

[0019] By adopting the above technical scheme, the mold shell and the flange plate are clamped on both sides of the positioning ring, so that the sizing pipe and the mold shell are connected more firmly and tightly.

[0020] Optionally, the side of the box body towards the flange plate is opened, the box body is welded with the flange plate, the flange plate is provided with a ring groove, the ring groove is arranged on the outer side of the sizing pipe in a one-to-one correspondence, and the ring groove and the cooling cavity are in communication with each other.

[0021] By adopting the above technical scheme, the cooling water in the cooling cavity can enter the ring groove to cool the sizing pipe in the ring groove, the cooling length of the sizing pipe is improved, and the cooling effect of the PEEK rod during extrusion is improved.

[0022] Optionally, the distance from the upper extrusion flow channel to the adjacent two lower extrusion flow channels is equal.

[0023] By adopting the above technical scheme, the rod extruded by the upper extrusion flow channel can be located in the middle of the rods extruded by the adjacent two lower extrusion flow channels under the guidance of the guide plate and on the same plane, so as to conveniently and smoothly enter the caterpillar tractor.

[0024] Optionally, the upper extrusion flow channel and the adjacent two lower extrusion flow channels are in equilateral triangle distribution.

[0025] Optionally, the inner diameter of the sizing pipe is less than 10 mm.

[0026] By adopting the above technical scheme, the PEEK rod with a diameter less than 10 mm has flexibility, so that the two rows of extruded rods can be on the same plane under the extrusion of the guide plate, so as to conveniently and smoothly enter the caterpillar tractor.

[0027] In a second aspect, the application provides an upper and lower double-row dog-tooth type small-diameter PEEK rod extrusion device, which adopts the following technical scheme:

[0028] An upper and lower double-row dog-tooth type small-diameter PEEK rod extrusion device, comprising:

[0029] an extruder; and

[0030] The upper and lower double-row dog type small-diameter PPEK rod extrusion die as described above.

[0031] By adopting the technical scheme, the PEEK rod materials extruded by the upper and lower extrusion channels can be in the same plane under the limiting action of the guide groove of the guide plate, so as to facilitate the entry into the track tractor during production and greatly improve the production capacity of the small-diameter PEEK rod.

[0032] In summary, the present application includes at least one of the following beneficial technical effects:

[0033] 1. The PEEK rod materials extruded by the upper and lower extrusion channels can be in the same plane under the limiting action of the guide groove of the guide plate, so as to facilitate the entry into the track tractor during production and greatly improve the production capacity of the small-diameter PEEK rod.

[0034] 2. The PEEK rod with a diameter less than 10mm has flexibility, so that the two rows of extruded rod materials can be arranged in one row under the extrusion of the guide plate, so as to facilitate the smooth entry into the track tractor. BRIEF DESCRIPTION OF DRAWINGS

[0035] Figure 1 is a front view of the PEEK rod extrusion die in the related art.

[0036] Figure 2 is Figure 1 a sectional view in A-A direction of

[0037] Figure 3 is a structure schematic view of an upper and lower double-row dog type small-diameter PPEK rod extrusion die of the embodiment 1 of the present application.

[0038] Figure 4 is a front view of an upper and lower double-row dog type small-diameter PPEK rod extrusion die of the embodiment 1 of the present application.

[0039] Figure 5 is Figure 4 a sectional view in B-B direction of

[0040] Figure 6 is Figure 4 a sectional view in C-C direction of

[0041] Explanation of reference signs: 10, die shell; 11, feeding port; 12, hanger flow channel; 13, upper row of extrusion flow channels; 131, upper extrusion flow channel; 14, lower row of extrusion flow channels; 141, lower extrusion flow channel; 15, front mold plate; 16, rear mold plate; 20, sizing tube; 21, positioning ring; 30, cooling mechanism; 31, box body; 311, cooling cavity; 312, water inlet; 313, water outlet; 40, flange plate; 41, ring groove; 50, guide plate; 51, guide groove; 60, feeding pipe; 61, press ring; 611, embedding groove; 62, limiting ring. DETAILED DESCRIPTION

[0042] The following will be described in detail with reference to the accompanying drawings. Figures 3-6 The present application will be described in further detail. The direction indicated by the arrow x is upward, and the direction opposite to the arrow x is downward.

[0043] In the world, peers solve the problem of low production capacity of small-diameter PEEK rod by replacing the extruder with a smaller one, such as using a 25 model single-screw extruder, using multiple small extruders and molds to produce simultaneously to improve the production capacity of small-diameter PEEK rod. However, this method also has obvious disadvantages, that is, the equipment occupies a larger area and the financial cost is higher.

[0044] The embodiment of the present application discloses a small-diameter PEEK rod extrusion die. Referring to Figure 3 The small-diameter PEEK rod extrusion die comprises a die shell 10, a sizing tube 20 and a cooling mechanism 30.

[0045] Referring to Figure 4 , Figure 5 With Figure 6 , the die shell 10 comprises a front mold plate 15 and a rear mold plate 16, and the front mold plate 15 and the rear mold plate 16 are fixed together by screws. The side where the front mold plate 15 is located is the front side, and the side where the rear mold plate 16 is located is the rear side.

[0046] The die shell 10 has a feeding port 11, a hanger flow channel 12, an upper row of extrusion flow channels 131 and a lower row of extrusion flow channels 14. Specifically, the feeding port 11 is formed on the front mold plate 15 and penetrates through the front side wall of the front mold plate 15, and the feeding port 11 is used to connect the extruder. The hanger flow channel 12 is formed at the connection between the front mold plate 15 and the rear mold plate 16, the size of the hanger flow channel 12 gradually increases from front to back, and the front side of the hanger flow channel 12 is in communication with the feeding port 11. The upper row of extrusion flow channels 13 is formed on the rear mold plate 16, the front end of the upper row of extrusion flow channels 13 is in communication with the hanger flow channel 12, and the rear end of the upper row of extrusion flow channels 13 penetrates through the rear side wall of the rear mold plate 16. The upper row of extrusion flow channels 13 comprises a plurality of upper extrusion flow channels 131, and the plurality of upper extrusion flow channels 131 are uniformly arranged along the length direction of the hanger flow channel 12.

[0047] The lower row of extrusion channels 14 is arranged on the rear mold plate 16, the front end of the lower row of extrusion channels 14 is in communication with the clothes hanger flow channel 12, and the rear end of the lower row of extrusion channels 14 penetrates the rear side wall of the rear mold plate 16. The lower row of extrusion channels 14 includes a plurality of lower extrusion channels 141, which are evenly arranged along the length direction of the clothes hanger flow channel 12. The arrangement direction of the lower row of extrusion channels 14 is parallel to the arrangement direction of the upper row of extrusion channels 13, the upper extrusion channel 131 and the adjacent two lower extrusion channels 141 are arranged in a triangular shape, and the upper extrusion channel 131 can be inserted between the adjacent two lower extrusion channels 141. The adjacent two upper extrusion channels 131 can share one lower extrusion channel 141, that is, the number of lower extrusion channels 141 is one more than the number of upper extrusion channels 131; or the adjacent two upper extrusion channels 131 can not share one lower extrusion channel 141, that is, two or more lower extrusion channels 141 are located between the adjacent two upper extrusion channels 131. In this embodiment, the adjacent two upper extrusion channels 131 share one lower extrusion channel 141.

[0048] In order to make the PEEK rod material extruded by the upper extrusion channel 131 be clamped by the guide plate 50 and be located between the PEEK rod materials extruded by the adjacent two lower extrusion channels 141 and be on the same plane, the distance from the upper extrusion channel 131 to the adjacent two lower extrusion channels 141 is equal. Further, the upper extrusion channel 131 and the adjacent two lower extrusion channels 141 are arranged in an equilateral triangle. The spacing between the adjacent two upper extrusion channels 131 and the spacing between the upper extrusion channel 131 and the adjacent lower extrusion channel 141 can be adjusted according to the size of the produced PEEK rod material, and the specific number of the lower extrusion channel 141 and the upper extrusion channel 131 can also be adjusted according to the size of the produced PEEK rod material, so as to improve the production capacity as much as possible.

[0049] The sizing pipe 20 is arranged on the mold shell 10 and is in one-to-one correspondence with the upper row of extrusion channels 13 and the lower row of extrusion channels 14. Specifically, the number of the sizing pipe 20 is the sum of the number of the upper extrusion channel 131 and the lower extrusion channel 141, the sizing pipe 20 abuts against the rear side wall of the rear mold plate 16, and the sizing pipe 20 is in communication with the corresponding upper extrusion channel 131 and lower extrusion channel 141 and is arranged in a concentric manner. The flange plate 40 is sleeved on the sizing pipe 20, the sizing pipe 20 is fixed relative to the flange plate 40, and the flange plate 40 is fixed on the rear side of the rear mold plate 16 by screws to fix the sizing pipe 20 on the rear mold plate 16.

[0050] Further, the end of the sizing pipe 20 towards the rear mold plate 16 is fixed with a limiting ring 62, and the limiting ring 62 is welded with the flange plate 40, so that the sizing pipe 20 and the rear mold plate 16 are connected more firmly and tightly.

[0051] The cooling mechanism 30 is sleeved on the plurality of sizing pipes 20 to cool the bars passing through the sizing pipes 20. Specifically, the cooling mechanism 30 comprises a box body 31 sleeved on the plurality of sizing pipes 20, the box body 31 is located at the rear side of the flange plate 40 and welded with the flange plate 40, and the box body 31 is sealingly connected with the outer peripheral wall of the sizing pipes 20. The box body 31 has a cooling cavity 311, a water inlet 312 and a water outlet 313, and the cooling cavity 311 surrounds the outside of the plurality of sizing pipes 20. The water inlet 312 and the water outlet 313 are respectively formed on the two sides in the length direction of the box body 31, the water inlet 312 is formed on the lower side wall of the box body 31, and the water outlet 313 is formed on the upper side wall of the box body 31, so that the cooling water entering through the water inlet 312 can take away enough heat in the sizing pipes 20, thereby improving the utilization efficiency of the cooling water.

[0052] In addition, the water inlet 312 can also be formed on the upper side wall of the box body 31, and the water outlet 313 is formed on the lower side wall of the box body 31. The water inlet 312 and the water outlet 313 can also be respectively formed on the two opposite side walls of the box body 31.

[0053] In order to improve the cooling effect, the box body 31 is opened on the side facing the flange plate 40, and the box body 31 is sealingly connected with the flange plate 40. The flange plate 40 is sealingly connected with the sizing pipes 20, and the flange plate 40 is provided with a ring groove 41 surrounding the outside of the sizing pipes 20, the rear side of the ring groove 41 penetrates through the rear side wall of the flange plate 40, and the ring groove 41 and the cooling cavity 311 are in communication with each other, so that the cooling water in the box body 31 can enter the ring groove 41, thereby increasing the cooling length of the sizing pipes 20.

[0054] In order to facilitate the connection of the extrusion die and the extruder, the upper and lower double-row dog type small-diameter PPEK bar extrusion die further comprises a feeding pipe 60 fixed to the front side of the front die plate 15. Specifically, the feeding pipe 60 abuts against the front side of the front die plate 15, and the feeding pipe 60 is concentrically arranged with the feeding port 11. A pressing ring 61 is sleeved on the feeding pipe 60, the pressing ring 61 is fixed to the front side of the front die plate 15 by screws, and the rear end of the feeding pipe 60 is fixed with a limiting ring 62. The rear side of the pressing ring 61 is provided with an embedding groove 611, and the limiting ring 62 is embedded in the embedding groove 611, so as to fix the feeding pipe 60 to the front side of the front die plate 15. The front end of the feeding pipe 60 has external threads to facilitate connection with the extruder.

[0055] The embodiment of the application is mainly applicable to the production of PEEK rods with a diameter less than 10 mm, because it is difficult to press the PEEK rods with a diameter greater than φ10 mm into a row by the guide plate 50. The PEEK rods with a diameter less than φ10 mm are flexible and can be easily pressed into a row by the guide plate 50, and then smoothly enter the track traction machine. The track traction machine pulls the extruded PEEK rods, so that the speed of the PEEK rods is matched with the extrusion speed of the extruder, and the tightness of the extruded PEEK rods is consistent. When the above extrusion die is used in cooperation with the 45-type single-screw extruder, the 24-hour output can reach 65 kg to 85 kg. Taking the φ6 mm PEEK rod extrusion die as an example, the width of the die flow channel can be 488 mm, the number of the upper extrusion flow channels 131 is 23, and the number of the lower extrusion flow channels 141 is 24, that is, 47 φ6 mm PEEK rods can be extruded at the same time.

[0056] The implementation principle of the small-diameter PEEK rod extrusion die in the embodiment of the application is as follows: the upper row of extrusion flow channels 13 and the lower row of extrusion flow channels 14 are arranged, the upper extrusion flow channels 131 of the upper row of extrusion flow channels 13 are arranged in an equilateral triangle with the adjacent two lower extrusion flow channels 141, so that the PEEK rod materials extruded by the upper row of extrusion flow channels 13 and the lower row of extrusion flow channels 14 can be on the same plane under the limiting action of the guide groove 51 of the guide plate 50, so as to facilitate the entry of the track traction machine during production, and greatly improve the output of the small-diameter PEEK rod.

[0057] Embodiment 2

[0058] The embodiment of the application discloses an upper and lower double-row canine type small-diameter PPEK rod extrusion device, which comprises an extruder and an upper and lower double-row canine type small-diameter PPEK rod extrusion die as described above. The upper and lower double-row canine type small-diameter PPEK rod extrusion die is connected to the extruder.

[0059] The above are the preferred embodiments of the application, and do not limit the protection scope of the application. Therefore, equivalent changes made on the basis of the structure, shape and principle of the application should be covered by the protection scope of the application.

Claims

1. A double row of teeth type small diameter PPEK rod extrusion die, characterized in that, It includes: The shell (10) has a feeding port (11), a hanger flow channel (12), an upper row of extrusion flow channels (13) and a lower row of extrusion flow channels (14), the feeding port (11) is used for connecting an extruder, the upper row of extrusion flow channels (13) and the lower row of extrusion flow channels (14) are located on the same side of the hanger flow channel (12), the feeding port (11) is communicated with the hanger flow channel (12), the upper row of extrusion flow channels (13) and the lower row of extrusion flow channels (14) are both communicated with the hanger flow channel (12), the upper row of extrusion flow channels (13) includes a plurality of upper extrusion flow channels (131), the lower row of extrusion flow channels (14) includes a plurality of lower extrusion flow channels (141), an upper extrusion flow channel (131) and two adjacent lower extrusion flow channels (141) are distributed in a triangular shape, and an upper extrusion flow channel (131) can be inserted between two adjacent lower extrusion flow channels (141); A plurality of sizing pipes (20) are arranged on the shell (10) and are communicated with the upper row of extrusion flow channels (13) and the lower row of extrusion flow channels (14) one by one; and A cooling mechanism (30) is sleeved on the plurality of sizing pipes (20) to cool the rods passing through the sizing pipes (20).

2. The double helical small diameter PPEK rod extrusion die of claim 1 wherein, The cooling mechanism (30) includes a box body (31) sleeved on the plurality of sizing pipes (20), the box body (31) has a cooling cavity (311), a water inlet (312) and a water outlet (313), the water inlet (312) and the cooling cavity (311) are communicated with each other, and the water outlet (313) and the cooling cavity (311) are communicated with each other, and the box body (31) is sealingly connected with the sizing pipes (20).

3. The double helical small diameter PPEK rod extrusion die of claim 2, wherein: The water inlet (312) is arranged on the lower side of the box body (31), and the water outlet (313) is arranged on the upper side of the box body (31).

4. The double helical small diameter PPEK rod extrusion die of claim 2, wherein: One side of the shell (10) is provided with a flange plate (40), the flange plate (40) is fixed relative to the shell (10), the sizing pipes (20) are arranged on the flange plate (40), and the sizing pipes (20) are fixed relative to the flange plate (40).

5. The double helical small diameter PPEK rod extrusion die of claim 4, wherein: The end of the sizing pipe (20) towards the shell (10) is provided with a positioning ring (21), and the positioning ring (21) is welded with the flange plate (40).

6. The double helical small diameter PPEK rod extrusion die of claim 4, wherein: The side of the box body (31) towards the flange plate (40) is open, the box body (31) is welded with the flange plate (40), the flange plate (40) is provided with a ring groove (41), the ring groove (41) is arranged on the outer side of the sizing pipe (20) one by one, and the ring groove (41) and the cooling cavity (311) are communicated with each other.

7. The double helical small diameter PPEK rod extrusion die of claim 1 wherein: The distance from one upper extrusion flow channel (131) to two adjacent lower extrusion flow channels (141) is equal.

8. The double-flighted small-diameter PPEK rod extrusion die of claim 7, wherein: The upper extrusion flow channel (131) and the two adjacent lower extrusion flow channels (141) are distributed in an equilateral triangle shape.

9. The double helical small diameter PPEK rod extrusion die of claim 1 wherein: The inner diameter of the sizing pipe (20) is less than 10 mm.

10. A double row of teeth small diameter PPEK rod extrusion device, characterized in that, It includes: An extruder; and A double-row dog teeth small-diameter PPEK rod extrusion die according to any one of claims 1-9.

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