Multi-cavity polytetrafluoroethylene thin-wall forming die

Abstract

The utility model provides a multi-cavity polytetrafluoroethylene thin-wall forming die, which relates to the technical field of forming dies, and comprises a machine body, a forming bin is arranged at the top end of the machine body, a feeding hopper is arranged at the top end of the forming bin, a lifting device is arranged at one end of the machine body, and the lifting device comprises two groove rods. The inner walls of the two groove rods are slidably connected with a sliding plate, the top end of the U-shaped rod is rotatably connected with a plurality of positioning wheels, and the outer surface of the U-shaped rod is fixedly connected with a round rod. By arranging the lifting device, the lower portion of a thin-walled tube is supported through the positioning wheels, and the thin-walled tube is prevented from falling down as much as possible when output; the sliding plate can be conveniently controlled to slide on the inner wall of the groove rod by pushing the sliding plate to adjust the horizontal position of the sliding plate, the height positions of the U-shaped rod and the positioning wheel can be adjusted by pulling the round rod, the support does not need to be replaced according to needs, and the practicability and flexibility of the forming device in use are improved.

Description

Technical Field

[0001] This utility model relates to the field of molding die technology, and in particular to a multi-cavity polytetrafluoroethylene thin-wall molding die. Background Technology

[0002] Polytetrafluoroethylene (PTFE) is a polymer compound formed by the polymerization of tetrafluoroethylene monomers. It has extremely high corrosion resistance to many chemicals and is almost unaffected by any chemical corrosion. Therefore, it is used in the chemical industry to manufacture corrosion-resistant pipes, containers and other equipment. Extrusion molds are usually used when making multi-cavity PTFE thin-walled pipes.

[0003] When producing multi-cavity polytetrafluoroethylene thin-walled tubes using an extruder, a support bracket is usually placed at one end of the extrusion equipment to prevent the tube from tilting or drooping during output. However, since different types of tubes have different extrusion length requirements, different support brackets need to be used to support the tubes, which reduces the convenience of using the extrusion device. Utility Model Content

[0004] The purpose of this invention is to solve the problem that when producing multi-cavity polytetrafluoroethylene thin-walled tubes by an extruder, a support bracket is usually placed at one end of the extrusion equipment to prevent the tube from tilting or falling during output. However, since different types of tubes have different extrusion length requirements, different support brackets need to be replaced when supporting the tubes, which reduces the convenience of using the extrusion device. Therefore, this invention proposes a thin-walled tube forming mold.

[0005] To achieve the above objectives, the present invention adopts the following technical solution: a multi-cavity polytetrafluoroethylene thin-wall molding die, comprising a machine body, a molding chamber for heating and extruding polytetrafluoroethylene at the top of the machine body, a feeding hopper for feeding material at the top of the molding chamber, a die head at one end of the molding chamber, and a lifting device for supporting and lifting the formed thin-walled tube at one end of the machine body.

[0006] The effect achieved by the above components is as follows: when using the molding die, polytetrafluoroethylene raw material is added into the molding chamber through the feeding hopper, and the machine body is controlled by the control box on one side of the machine body to heat the raw material in the molding chamber and extrude the raw material into a multi-cavity thin-walled tube through the die head at one end of the molding chamber.

[0007] Preferably, the lifting device includes two grooved rods, one end of which is fixedly connected to one end of the forming chamber. A sliding plate is slidably connected to the inner wall of the two grooved rods. A U-shaped rod is slidably connected to the inner wall of the sliding plate. A plurality of positioning wheels are rotatably connected to the top end of the U-shaped rod. A round rod is fixedly connected to the outer surface of the U-shaped rod. The outer surface of the round rod slides on the inner wall of the sliding plate. A spring is provided on the outer surface of the round rod. The upper and lower ends of the spring are fixedly connected to the top end of the sliding plate and the bottom end of the U-shaped rod, respectively. A threaded ring is threadedly connected to the outer surface of the round rod.

[0008] The effect achieved by the above components is as follows: By setting positioning wheels, when using the molding die, the sliding plate can be pulled at one end of the molding chamber to slide on the inner wall of the two groove rods. The horizontal position of the sliding plate is adjusted according to the length of the thin-walled tube extruded. Then, the round rod is pulled to control the round rod to slide up and down on the inner wall of the sliding plate, which drives the U-shaped rod to move up and down to adjust the height of the U-shaped rod to match the outlet height of the die head. Then, the threaded ring on the outer surface of the round rod is rotated to move the threaded ring upward on the outer surface of the round rod, so that the top end is pressed against the bottom end of the sliding plate to fix the height of the U-shaped rod. When the U-shaped rod moves up and down, the spring on the outer surface of the round rod will deform. The thin-walled tube output from the die head will enter the surface of each positioning wheel at the top of the U-shaped rod and move on the surface of the positioning wheel. The positioning wheels can support the bottom of the thin-walled tube. After the molding device is used, the threaded ring is rotated away from the bottom end of the U-shaped rod. Then the spring returns to its original state and drives the U-shaped rod to return to its original position.

[0009] Preferably, a plurality of protrusions are fixedly connected to the outer surface of the threaded ring, and the protrusions are circumferentially distributed on the outer surface of the threaded ring.

[0010] The effect achieved by the above components is that by pressing the protrusion on the outer surface of the threaded ring with your hand, it is easier to push the threaded ring to rotate and it is less likely to slip.

[0011] Preferably, the outer surface of the groove rod is provided with a positioning component, the positioning component includes a metal elastic sheet, one end of the elastic sheet is fixedly connected to one side of the groove rod, and rubber plates are fixedly connected to both sides of the sliding plate, with the end of the elastic sheet away from the groove rod abutting against the rubber plate on the outer surface of the sliding plate.

[0012] The effect achieved by the above components is as follows: when the sliding plate is pulled to move, the elastic plates on both sides of the sliding plate will bend outward at a certain angle. When the sliding plate is stationary, the two elastic plates will contract inward and press one end against the rubber plate on both sides of the sliding plate, further restricting the position of the sliding plate and preventing the sliding plate from moving on its own as much as possible.

[0013] Preferably, a wedge block is fixedly connected to one side of the groove rod, and the end of the wedge block away from the groove rod is fixedly connected to one side of the elastic sheet.

[0014] The effect achieved by the above components is that by setting the inclined block, the back side of the elastic sheet can be supported, and the connection between the elastic sheet and the groove rod can be bent as much as possible due to prolonged outward bending.

[0015] Preferably, the U-shaped rod is provided with an auxiliary device inside, the auxiliary device including an L-shaped plate, the outer surface of the L-shaped plate sliding on the inner wall of the U-shaped rod, a slider fixedly connected to one side of the L-shaped plate, a groove being formed on one side of the U-shaped rod, and the outer surface of the slider sliding on the inner wall of the groove.

[0016] The effect achieved by the above components is as follows: when adjusting the height of the U-shaped rod using the lifting device, the slider can be pushed to control the slider to slide on the inner wall of the groove, controlling the L-shaped plate to move towards the molding chamber, aligning one end of the L-shaped plate with the mold head position at one end of the molding chamber, which facilitates precise control of the U-shaped rod height adjustment to match the output height of the mold head, and improves the convenience of using the lifting device.

[0017] Preferably, a positioning block is fixedly connected to the outer surface of the slider, the positioning block is a magnetic block with a certain magnetism, and the U-shaped rod is made of metal iron.

[0018] The effect achieved by the above components is as follows: after pushing the slider to control the movement of the L-shaped plate to align the height position of the U-shaped rod and the mold head, the slider is then pushed to retract the L-shaped plate into the U-shaped rod. One side of the magnetic positioning block will adhere to the outer surface of the U-shaped rod and magnetically attract to fix the position of the L-shaped plate inside the U-shaped rod.

[0019] Compared with the prior art, the advantages and positive effects of this utility model are as follows:

[0020] In this invention, by setting up a lifting device, the output thin-walled tube enters the surface of the positioning wheel at the top of the U-shaped rod. The positioning wheel supports the lower part of the thin-walled tube, minimizing the risk of the thin-walled tube sagging during output. By pushing the sliding plate, the sliding plate can be easily controlled to slide and adjust its horizontal position on the inner wall of the groove rod. Pulling the round rod can adjust the height of the U-shaped rod and the positioning wheel. There is no need to replace the bracket as needed, thus improving the practicality and flexibility of the forming device during use. Attached Figure Description

[0021] Figure 1 This is a three-dimensional structural diagram of the present invention;

[0022] Figure 2 This is a three-dimensional structural diagram of the body of this utility model;

[0023] Figure 3 This utility model Figure 2 A magnified three-dimensional structural diagram of part A;

[0024] Figure 4 This is a three-dimensional structural diagram of the sliding plate of this utility model;

[0025] Figure 5 This is a three-dimensional structural diagram of the round rod of this utility model;

[0026] Figure 6 This is a three-dimensional structural diagram of the L-shaped plate of this utility model.

[0027] Legend: 1. Machine body; 2. Lifting device; 3. Auxiliary device; 4. Forming chamber; 5. Feeding hopper; 6. Die head; 21. Groove rod; 22. Sliding plate; 23. U-shaped rod; 24. Positioning wheel; 25. Round rod; 26. Spring; 27. Threaded ring; 28. Protrusion; 29. ​​Positioning assembly; 291. Elastic sheet; 292. Rubber plate; 293. Inclined block; 31. L-shaped plate; 32. Slide groove; 33. Sliding block; 34. Positioning block. Detailed Implementation

[0028] Example 1, such as Figure 1-2 As shown, a multi-cavity polytetrafluoroethylene (PTFE) thin-wall molding die includes a machine body 1. The top of the machine body 1 is provided with a molding chamber 4 for heating and extruding PTFE. The top of the molding chamber 4 is provided with a feeding hopper 5 for feeding material. One end of the molding chamber 4 is provided with a die head 6. One end of the machine body 1 is provided with a lifting device 2 for supporting and lifting the formed thin-walled tube. When using the molding die, PTFE raw material is added into the molding chamber 4 through the feeding hopper 5. The machine body 1 is controlled by a control box on one side of the machine body 1 to operate, so that the molding chamber 4 heats the raw material and extrudes the raw material through the die head 6 at one end of the molding chamber 4 to form a multi-cavity thin-walled tube.

[0029] Reference Figure 2-5As shown in this embodiment: the lifting device 2 includes two grooved rods 21, one end of which is fixedly connected to one end of the forming chamber 4. A sliding plate 22 is slidably connected to the inner wall of the two grooved rods 21. A U-shaped rod 23 is slidably connected to the inner wall of the sliding plate 22. Several positioning wheels 24 are rotatably connected to the top of the U-shaped rod 23. A round rod 25 is fixedly connected to the outer surface of the U-shaped rod 23. The outer surface of the round rod 25 slides on the inner wall of the sliding plate 22. A spring 26 is provided on the outer surface of the round rod 25. The upper and lower ends of the spring 26 are respectively connected to the top of the sliding plate 22 and... The bottom end of the U-shaped rod 23 is fixedly connected, and the outer surface of the round rod 25 is threaded with a threaded ring 27. By setting a positioning wheel 24, when using the forming mold, the sliding plate 22 can be pulled at one end of the forming chamber 4 to slide on the inner wall of the two groove rods 21. The horizontal position of the sliding plate 22 is adjusted according to the length of the thin-walled tube extrusion. Then, the round rod 25 is pulled to control the round rod 25 to slide up and down on the inner wall of the sliding plate 22, which drives the U-shaped rod 23 to move up and down to adjust the height of the U-shaped rod 23 to match the exit height of the die head 6. Then, the threaded ring 27 on the outer surface of the round rod 25 is rotated to make The threaded ring 27 moves upward on the outer surface of the round rod 25, with its top end abutting against the bottom end of the sliding plate 22, fixing the height position of the U-shaped rod 23. When the U-shaped rod 23 moves up and down, the spring 26 on the outer surface of the round rod 25 deforms. The thin-walled tube output from the die head 6 enters the surfaces of the positioning wheels 24 at the top of the U-shaped rod 23 and moves on the surfaces of the positioning wheels 24. The positioning wheels 24 can support the bottom of the thin-walled tube. After the forming device is used, the threaded ring 27 is rotated away from the bottom end of the U-shaped rod 23, and then the spring 26 returns to its original shape, which will drive the U-shaped rod. 23. Return to the original position. By setting up the lifting device 2, the output thin-walled tube enters the surface of the positioning wheel 24 at the top of the U-shaped rod 23. The positioning wheel 24 supports the bottom of the thin-walled tube, minimizing the downward angle of the thin-walled tube during output. By pushing the sliding plate 22, the sliding plate 22 can be easily controlled to slide and adjust its horizontal position on the inner wall of the groove rod 21. Pulling the round rod 25 can adjust the height of the U-shaped rod 23 and the positioning wheel 24. There is no need to replace the bracket as needed, which improves the practicality and flexibility of the molding device during use.

[0030] Reference Figure 2-5 As shown in this embodiment, a number of protrusions 28 are fixedly connected to the outer surface of the threaded ring 27. The protrusions 28 are distributed circumferentially on the outer surface of the threaded ring 27. By pressing the protrusions 28 on the outer surface of the threaded ring 27 with your hand, you can more easily push the threaded ring 27 to rotate and it is not easy to slip.

[0031] Reference Figure 2-5As shown in this embodiment: a positioning component 29 is provided on the outer surface of the groove rod 21. The positioning component 29 includes a metal elastic sheet 291. One end of the elastic sheet 291 is fixedly connected to one side of the groove rod 21. Rubber plates 292 are fixedly connected to both sides of the sliding plate 22. The end of the elastic sheet 291 away from the groove rod 21 abuts against the rubber plate 292 on the outer surface of the sliding plate 22. When the sliding plate 22 is pulled to move, the elastic sheets 291 on both sides of the sliding plate 22 will bend outward at a certain angle. When the sliding plate 22 is stationary, the two elastic sheets 291... The sheet 291 will retract inward and press one end against the rubber sheets 292 on both sides of the sliding plate 22, further restricting the position of the sliding plate 22 and preventing the sliding plate 22 from moving on its own as much as possible. A wedge block 293 is fixedly connected to one side of the groove rod 21. The end of the wedge block 293 away from the groove rod 21 is fixedly connected to one side of the elastic sheet 291. By setting the wedge block 293, the back side of the elastic sheet 291 can be supported, and the connection between the elastic sheet 291 and the groove rod 21 can be bent as much as possible due to prolonged outward bending.

[0032] Reference Figure 1 , Figure 5 and Figure 6 As shown in this embodiment: an auxiliary device 3 is provided inside the U-shaped rod 23. The auxiliary device 3 includes an L-shaped plate 31. The outer surface of the L-shaped plate 31 slides on the inner wall of the U-shaped rod 23. A slider 33 is fixedly connected to one side of the L-shaped plate 31. A groove 32 is opened on one side of the U-shaped rod 23. The outer surface of the slider 33 slides on the inner wall of the groove 32. When the height position of the U-shaped rod 23 is adjusted using the lifting device 2, the slider 33 can be pushed to control the slider 33 to slide on the inner wall of the groove 32, controlling the L-shaped plate 31 to move towards the molding chamber 4, connecting one end of the L-shaped plate 31 with the mold head 6 at one end of the molding chamber 4. Position alignment facilitates precise control of the U-shaped rod 23 to adjust its height to match the output height of the mold head 6, improving the convenience of using the lifting device 2. A positioning block 34 is fixedly connected to the outer surface of the slider 33. The positioning block 34 is a magnetic block with a certain magnetism. The U-shaped rod 23 is made of metal iron. After pushing the slider 33 to control the movement of the L-shaped plate 31 to align the height position of the U-shaped rod 23 and the mold head 6, the slider 33 is pushed again to bring the L-shaped plate 31 into the interior of the U-shaped rod 23. One side of the magnetic positioning block 34 will adhere to the outer surface of the U-shaped rod 23 and magnetically attract to fix the position of the L-shaped plate 31 inside the U-shaped rod 23.

[0033] Working principle: When using the molding device, the sliding plate 22 is pulled at one end of the molding chamber 4 and slides against the inner wall of the two groove rods 21. The horizontal position of the sliding plate 22 is adjusted according to the length of the thin-walled tube extruded. Then, the round rod 25 is pulled to control the round rod 25 to slide up and down against the inner wall of the sliding plate 22, which drives the U-shaped rod 23 to move up and down to adjust the height of the U-shaped rod 23. This pushes the slider 33 to control the slider 33 to slide against the inner wall of the groove 32, controlling the L-shaped plate 31 to move towards the molding chamber 4. This aligns one end of the L-shaped plate 31 with the die head 6 at one end of the molding chamber 4, facilitating precise control of the height adjustment of the U-shaped rod 23 to match the output height of the die head 6, so that the U-shaped rod 23 and the die head 6 are aligned. After the outlet height is adapted, the threaded ring 27 on the outer surface of the round rod 25 is rotated to move the threaded ring 27 upward on the outer surface of the round rod 25 so that the top end abuts against the bottom end of the sliding plate 22, fixing the height position of the U-shaped rod 23. Then, the polytetrafluoroethylene raw material is added into the molding chamber 4 through the feeding hopper 5. The machine body 1 is operated by the control box on one side of the machine body 1, so that the molding chamber 4 heats the raw material and extrudes the raw material into a multi-cavity thin-walled tube through the die head 6 at one end of the molding chamber 4. The thin-walled tube output from the die head 6 will enter the surface of each positioning wheel 24 at the top of the U-shaped rod 23 and move on the surface of the positioning wheel 24. The positioning wheel 24 can support the bottom of the thin-walled tube.

[0034] The above description is merely a preferred embodiment of this utility model and is not intended to limit the utility model in any other way. Any person skilled in the art may use the disclosed technical content to make changes or modifications to create equivalent embodiments for application in other fields. However, any simple modifications, equivalent changes, and modifications made to the above embodiments based on the technical essence of this utility model, without departing from the scope of the utility model's technical solution, still fall within the protection scope of this utility model's technical solution. In the description of this utility model, it should be noted that, unless otherwise explicitly specified and limited, the terms "installation," "connection," and "joining" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal connection of two components. For those skilled in the art, the specific meaning of the above terms in this utility model can be understood through specific circumstances.

Claims

1. A multi-cavity thin-walled mould of polytetrafluoroethylene, comprising a body (1), characterised in that: The top end of the machine body (1) is provided with a forming bin (4) for heating and extruding polytetrafluoroethylene, the top end of the forming bin (4) is provided with a feeding hopper (5) for feeding, one end of the forming bin (4) is provided with a die head (6), one end of the machine body (1) is provided with a lifting device (2) for supporting and lifting the formed thin-walled pipe; the lifting device (2) comprises two groove rods (21), one end of the two groove rods (21) is fixedly connected with one end of the forming bin (4), the inner wall of the two groove rods (21) is slidably connected with a sliding plate (22), the inner wall of the sliding plate (22) is slidably connected with a U-shaped rod (23), the top end of the U-shaped rod (23) is rotatably connected with a plurality of positioning wheels (24), the outer surface of the U-shaped rod (23) is fixedly connected with a round rod (25), the outer surface of the round rod (25) slides on the inner wall of the sliding plate (22), the outer surface of the round rod (25) is provided with a spring (26), the upper and lower ends of the spring (26) are fixedly connected with the top end of the sliding plate (22) and the bottom end of the U-shaped rod (23) respectively, and the outer surface of the round rod (25) is threadedly connected with a threaded ring (27).

2. A multi-cavity thin-walled polytetrafluoroethylene molding die according to claim 1, characterized by: The outer surface of the threaded ring (27) is fixedly connected with a plurality of protrusions (28), and the protrusions (28) are circumferentially distributed on the outer surface of the threaded ring (27).

3. A multi-cavity thin-walled polytetrafluoroethylene molding die according to claim 2, characterized by: The outer surface of the groove rod (21) is provided with a positioning assembly (29) which can further limit the position of the sliding plate (22) on the outer surface of the groove rod (21).

4. A multi-cavity thin-walled polytetrafluoroethylene molding die according to claim 3, characterized by: The positioning assembly (29) comprises a metal elastic sheet (291), one end of the elastic sheet (291) is fixedly connected with one side of the groove rod (21), and the two sides of the sliding plate (22) are fixedly connected with rubber plates (292), and the end of the elastic sheet (291) away from the groove rod (21) abuts against the rubber plate (292) on the outer surface of the sliding plate (22).

5. A multi-cavity thin-walled polytetrafluoroethylene molding die according to claim 4, characterized by: One side of the groove rod (21) is fixedly connected with an inclined block (293), and the end of the inclined block (293) away from the groove rod (21) is fixedly connected with one side of the elastic sheet (291).

6. A multi-cavity thin-walled polytetrafluoroethylene molding die according to claim 5, characterized by: The inside of the U-shaped rod (23) is provided with an auxiliary device (3), the auxiliary device (3) comprises an L-shaped plate (31), the outer surface of the L-shaped plate (31) slides on the inner wall of the U-shaped rod (23), one side of the L-shaped plate (31) is fixedly connected with a sliding block (33), one side of the U-shaped rod (23) is provided with a sliding groove (32), and the outer surface of the sliding block (33) slides on the inner wall of the sliding groove (32).

7. A multi-cavity thin walled polytetrafluoroethylene molding die according to claim 6, wherein: The outer surface of the sliding block (33) is fixedly connected with a positioning block (34), the positioning block (34) is a magnetic block with magnetism, and the U-shaped rod (23) is made of metal iron.

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