Blanking and extruding machine for polytetrafluoroethylene production

Abstract

The utility model relates to the technical field of blank-forming and strip-pressing machines, in particular to a blank-forming and strip-extruding machine for polytetrafluoroethylene production, which comprises a rack and a controller, a first mounting plate is rotatably connected onto the rack, a blank-forming barrel is arranged on the first mounting plate, a blank-forming oil cylinder is horizontally and slidably connected onto the first mounting plate, and a blank-forming oil cylinder is arranged on the controller. A second mounting plate is horizontally connected to the rack in a sliding mode, a stripping oil cylinder is fixedly connected to the second mounting plate, the rack is provided with an overturning oil cylinder, and when the blank beating barrel rotates to be horizontally arranged, the blank beating oil cylinder, the blank beating barrel and the stripping oil cylinder are located on the same horizontal plane. When a required blank is relatively long, a first mounting plate is matched with an overturning oil cylinder, and a piston rod of the overturning oil cylinder extends out, so that a blank beating barrel is horizontally arranged, and a blank beating oil cylinder, the blank beating barrel and a stripping oil cylinder are positioned on the same horizontal plane; the occupied space of the blank beating oil cylinder, the blank beating barrel and the stripping oil cylinder is changed from the vertical direction to the horizontal direction, and the occupied height space is relatively small.

Description

Technical Field

[0001] This utility model relates to the technical field of blanking and extrusion machines, specifically to a blanking and extrusion machine for the production of polytetrafluoroethylene. Background Technology

[0002] Polytetrafluoroethylene (PTFE) tape has many advantages such as high temperature resistance, corrosion resistance, oxidation resistance and non-stick properties, and is widely used in military, chemical, machinery, electronics, aerospace, environmental protection and other fields.

[0003] Existing polytetrafluoroethylene (PTFE) blanking extrusion machines typically have blanking cylinders, blanking cylinders, and depressing cylinders arranged sequentially from top to bottom. The blanking cylinders and depressing cylinders are arranged facing each other. During blanking, the piston rods of the blanking cylinders and the piston rods of the depressing cylinders simultaneously press against the powder in the blanking cylinder. When a longer blank is required, the height of the blanking cylinder needs to be set relatively high, which in turn leads to a relatively high height of the blanking extrusion machine and a relatively large vertical space occupied.

[0004] In view of this, the applicant has conducted in-depth research on the above-mentioned issues, which led to this case. Utility Model Content

[0005] The purpose of this invention is to provide a blanking and extrusion machine for the production of polytetrafluoroethylene that occupies relatively little height space when the required blank is long.

[0006] To achieve the above objectives, the present invention adopts the following technical solution:

[0007] A preform extrusion machine for producing polytetrafluoroethylene (PTFE) includes a frame and a controller fixedly mounted on the frame. A first mounting plate is rotatably connected to the frame, and the rotation axis between the first mounting plate and the frame is arranged parallel to the width direction of the frame. A preform cylinder is provided on the first mounting plate, penetrating the first mounting plate and arranged perpendicular to it. A first limiting ring is provided on the inner side wall of the preform cylinder and arranged coaxially with the preform cylinder. A disc is placed inside the preform cylinder and abuts against the first limiting ring. A preform cylinder is horizontally slidably connected to the first mounting plate, and a preform cylinder with a piston rod that moves along the axial direction of the preform cylinder is fixedly connected to the piston rod of the preform cylinder. A first circular pressure block is fixedly connected to the piston rod of the preform cylinder. A first driving cylinder is provided on the first mounting plate for driving the preform cylinder to slide relative to the first mounting plate. A vertically arranged second mounting plate is horizontally slidably connected to the frame, and a piston rod is fixedly connected to the second mounting plate and arranged horizontally towards the first mounting plate. The first and second mounting plates are arranged along the length of the frame. A tilting cylinder is located between the first and second mounting plates. The piston rod of the tilting cylinder is hinged to the first mounting plate, and the cylinder body of the tilting cylinder is hinged to the frame. The hinge axis between the piston rod of the tilting cylinder and the first mounting plate is closer to the second mounting plate than the rotation axis of the first mounting plate and the frame. The horizontal position of the hinge axis between the piston rod of the tilting cylinder and the first mounting plate is higher than the horizontal position of the rotation axis of the first mounting plate and the frame. The first driving cylinder, the second driving cylinder, the blanking cylinder, and the descrambling cylinder are electrically connected to the controller. When the blanking cylinder rotates to a horizontal position, the blanking cylinder, the blanking cylinder, and the descrambling cylinder are located on the same straight line.

[0008] As an improvement of this utility model, a vertically arranged third mounting plate is fixedly connected to the frame. The first mounting plate and the third mounting plate are arranged along the width direction of the frame. An extrusion cylinder is provided on the third mounting plate, penetrating the third mounting plate and arranged perpendicular to the third mounting plate. An extrusion cylinder with a horizontally arranged piston rod is slidably connected to the third mounting plate. A second circular pressure block is fixedly connected to the piston rod of the extrusion cylinder. A third driving cylinder is also provided on the third mounting plate for driving the extrusion cylinder to slide relative to the third mounting plate. The third driving cylinder and the extrusion cylinder are respectively electrically connected to the controller.

[0009] As an improvement of this utility model, the frame is provided with a feeding assembly on the side of the first mounting plate away from the second mounting plate. The feeding assembly includes a sliding guide rail on the frame, a sliding block slidably connected to the sliding guide rail, a feeding plate fixedly connected to the sliding block, a fourth drive mechanism for driving the feeding plate to slide, a sliding column vertically slidably connected to the feeding plate, a sliding seat fixedly connected to the top of the sliding column, a fifth drive cylinder for driving the sliding seat to rise and fall, a feeding cylinder arranged on the sliding seat and along the length of the frame, and a piston rod fixedly installed at the end of the feeding cylinder away from the first mounting plate. A receiving and feeding cylinder moves axially. The sliding guide rail is arranged along the width of the frame. The first mounting plate and the third mounting plate are located on the same side of the sliding guide rail. The length of the sliding guide rail is greater than the distance between the first mounting plate and the third mounting plate. The piston rod of the receiving and feeding cylinder is inserted into the receiving and feeding cylinder. A lifting cylinder with the piston rod facing upward is fixedly connected to the sliding seat. One end of the receiving and feeding cylinder near the first mounting plate is rotatably connected to the sliding seat. The other end of the receiving and feeding cylinder is fixedly connected to the piston rod of the lifting cylinder. The fourth drive mechanism, the fifth drive cylinder, the receiving cylinder, and the lifting cylinder are electrically connected to the controller.

[0010] As an improvement of this utility model, the fourth drive mechanism includes a motor fixedly mounted on the frame, a gear fixedly connected to the output shaft of the motor, and a rack meshing with the gear. The rack is fixedly connected to the side of the receiving and feeding plate away from the first mounting plate, and the rack is arranged along the width direction of the frame.

[0011] As an improvement of this utility model, a groove is provided on the lower end face of the second mounting plate. The groove extends through the second mounting plate along the length direction of the frame. A second limiting ring is provided on the outer peripheral wall of the blanking cylinder and is arranged coaxially with the blanking cylinder. The distance between the two side walls of the groove is greater than the outer diameter of the blanking cylinder, and the distance between the two side walls of the groove is less than the outer diameter of the second limiting ring.

[0012] As an improvement of this utility model, the first mounting plate is provided with two first guide rails arranged parallel to the width direction of the frame, the blanking cylinder is located between the two first guide rails, each first guide rail is slidably connected with a first slider, each first slider is fixedly connected to the same first fixing plate through a first cylinder, the blanking cylinder is fixedly mounted on the first fixing plate, and the first fixing plate is provided with a first through hole for the piston rod of the blanking cylinder to pass through.

[0013] As an improvement of this utility model, the end of the extrusion barrel away from the third mounting plate is connected to a discharge pipe, and the inner diameter of the discharge pipe gradually decreases from the end of the discharge pipe connected to the extrusion barrel to the corresponding other end.

[0014] As an improvement of this utility model, a working platform is provided next to the frame.

[0015] By adopting the above technical solution, this utility model has the following beneficial effects:

[0016] When the required billet is long, the first mounting plate and the tilting cylinder work together to extend the piston rod of the tilting cylinder so that the billet cylinder is arranged horizontally. This makes the billet cylinder, the billet cylinder and the stripping cylinder on the same horizontal plane, changing the space occupied by the billet cylinder, the billet cylinder and the stripping cylinder from the vertical direction to the horizontal direction, and the height space occupied is relatively small. Attached Figure Description

[0017] Figure 1 This is a schematic diagram of the structure of a blanking and extrusion machine for the production of polytetrafluoroethylene according to this utility model;

[0018] Figure 2 This is a schematic diagram of the structure of a blanking extrusion machine for the production of polytetrafluoroethylene from another angle.

[0019] Figure 3 for Figure 1 Enlarged view of section A in the middle;

[0020] Figure 4 This is a schematic diagram of the material receiving and feeding assembly in this utility model;

[0021] Figure 5 This is a schematic diagram of the blanking cylinder in this utility model.

[0022] The corresponding markings in the diagram are as follows:

[0023] 10 - Rack; 20 - First mounting plate;

[0024] 21-Blank material cylinder; 22-First limiting ring;

[0025] 24-Blank forming cylinder;

[0026] 25 - First circular pressure block; 26 - First drive cylinder;

[0027] 27-Second mounting plate; 28-Discharge cylinder;

[0028] 29 - Second drive cylinder; 30 - Tilting cylinder;

[0029] 31-Third mounting plate; 32-Extrusion bar;

[0030] 33-Extrusion cylinder; 34-Second circular pressure block;

[0031] 35 - Third drive cylinder; 36 - Sliding guide rail;

[0032] 37-Sliding block; 38-Feeding plate;

[0033] 39 - Sliding column; 40 - Sliding seat;

[0034] 41-Feeding cylinder; 42-Feeding hydraulic cylinder;

[0035] 43-Lifting cylinder; 44-Motor;

[0036] 46-Rack;

[0037] 47 - Groove; 48 - Second limiting ring;

[0038] 49 - First guide rail; 50 - First slider;

[0039] 51-First fixed plate; 52-Discharge pipe;

[0040] 53-Work Platform. Detailed Implementation

[0041] The utility model will be further described below with reference to the accompanying drawings and specific embodiments.

[0042] The terms "first," "second," "third," "fourth," and "fifth," etc., used in the specification, claims, and drawings of this utility model are used to distinguish different objects, rather than to describe a specific order.

[0043] like Figures 1-5 As shown, this embodiment provides a blanking and extrusion machine for the production of polytetrafluoroethylene, including a frame 10 and a controller fixedly installed on the frame 10. The controller adopts a conventional PLC controller, which has the conventional function of analyzing and comparing input signals to output corresponding control signals.

[0044] A first mounting plate 20 is rotatably connected to the frame 10. The rotation axis between the first mounting plate 20 and the frame 10 is arranged parallel to the width direction of the frame 10. A blanking cylinder 21 is provided on the first mounting plate 20, penetrating the first mounting plate 20 and arranged perpendicular to the first mounting plate 20. A first limiting ring 22 is provided on the inner side wall of the blanking cylinder 21 and is arranged coaxially with the blanking cylinder 21. A disc (not shown in the figure) is placed inside the blanking cylinder 21 and abuts against the first limiting ring 22. A blanking cylinder 24 is horizontally slidably connected to the first mounting plate 20, and a first circular pressure block 25 is fixedly connected to the piston rod of the blanking cylinder 24. A first driving cylinder 26 is provided on the first mounting plate 20 to drive the blanking cylinder 24 to slide relative to the first mounting plate 20. The first mounting plate 20 and the first driving cylinder 26 are connected horizontally. The specific transmission connection structure between the hydraulic cylinders 26 can be a conventional structure, such as using a chain assembly to achieve the transmission connection. In this embodiment, a guide rail slider assembly is used to achieve the sliding connection between the first mounting plate 20 and the first driving hydraulic cylinder 26. Specifically, the first mounting plate 20 is provided with two first guide rails 49 arranged parallel to the width direction of the frame 10. The blanking cylinder 21 is located between the two first guide rails 49 and is located at the end of one end close to the first guide rail 49. Each first guide rail 49 is slidably connected with a first slider 50. Each first slider 50 is fixedly connected to the same first fixing plate 51 through a first cylinder. The blanking cylinder 24 is fixedly mounted on the first fixing plate 51. The first fixing plate 51 is provided with a first through hole (not shown in the figure) through which the piston rod of the blanking cylinder 24 passes.

[0045] A vertically arranged second mounting plate 27 is horizontally slidably connected to the frame 10. The plane of the second mounting plate 27 is parallel to the width direction of the frame 10, and the sliding direction of the second mounting plate 27 is parallel to the length direction of the frame 10. A descraping cylinder 28 with a horizontally arranged piston rod facing the first mounting plate 20 is fixedly connected to the second mounting plate 27. A second driving cylinder 29 for driving the second mounting plate 27 to slide relative to the frame 10 is provided on the second mounting plate 27. The specific transmission connection structure between the second mounting plate 27 and the second driving cylinder 29 can be a conventional structure, such as a transmission connection through a guide rail slider assembly, which will not be described in detail here. The first mounting plate 20 and the second mounting plate 27 are arranged along the length direction of the frame 10. A tilting cylinder 30 is provided on the frame 10 at a position between the first mounting plate 20 and the second mounting plate 27. The piston rod of the tilting cylinder 30 is hinged to the first mounting plate 20, and the cylinder body of the tilting cylinder 30 is hinged to the frame 10. The piston rod of cylinder 30 and the hinge axis of the first mounting plate 20 are close to the second mounting plate 27 relative to the rotation axis of the first mounting plate 20 and the frame 10. The horizontal position of the piston rod of the tilting cylinder 30 and the hinge axis of the first mounting plate 20 is higher than the horizontal position of the rotation axis of the first mounting plate 20 and the frame 10. The first drive cylinder 26, the second drive cylinder 29, the blanking cylinder 24, and the descrambling cylinder 28 are electrically connected to the controller. When the blanking cylinder 21 rotates to a horizontal position, the blanking cylinder 24... The blanking cylinder 21 and the stripping cylinder 28 are located on the same straight line. When the required blank is long, the blanking cylinder 21 is arranged horizontally by means of the cooperation between the first mounting plate 20 and the tilting cylinder 30 and the extension of the piston rod of the tilting cylinder 30. This makes the blanking cylinder 24, the blanking cylinder 21 and the stripping cylinder 28 located on the same horizontal plane, changing the space occupied by the blanking cylinder 24, the blanking cylinder 21 and the stripping cylinder 28 from the vertical direction to the horizontal direction, and the occupied height space is relatively small.

[0046] A vertically arranged third mounting plate 31 is fixedly connected to the frame 10. The plane of the third mounting plate 31 is parallel to the width direction of the frame 10. The first mounting plate 20 and the third mounting plate 31 are arranged along the width direction of the frame 10. An extrusion cylinder 32 is provided on the third mounting plate 31, penetrating the third mounting plate 31 and arranged perpendicular to the third mounting plate 31. An extrusion cylinder 33 with a horizontally arranged piston rod is slidably connected to the third mounting plate 31. The sliding direction of the extrusion cylinder 33 is parallel to the width direction of the frame 10. A second circular pressure block 34 is fixedly connected to the piston rod of the extrusion cylinder 33. A third drive cylinder 35 is also provided on the third mounting plate 31 for driving the extrusion cylinder 33 to slide relative to the third mounting plate 31. The specific transmission connection structure between the third mounting plate 31 and the third drive cylinder 35 can be a conventional structure, such as achieving the transmission connection through a guide rail slider assembly, which will not be described in detail here. The third drive cylinder 35 and the extrusion cylinder 33 are electrically connected to the controller.

[0047] The frame 10 has a feeding assembly on the side of the first mounting plate 20 away from the second mounting plate 27. The feeding assembly includes a sliding guide rail 36 on the frame 10, a sliding block 37 slidably connected to the sliding guide rail 36, a feeding plate 38 fixedly connected to the sliding block 37, a fourth drive mechanism for driving the feeding plate 38 to slide, a sliding column 39 vertically slidably connected to the feeding plate 38, a sliding seat 40 fixedly connected to the top of the sliding column 39, a fifth drive cylinder for driving the sliding seat 40 to rise and fall, a feeding cylinder 41 arranged on the sliding seat 40 and along the length of the frame 10, and a piston rod fixedly installed at the end of the feeding cylinder 41 away from the first mounting plate 20. The receiving cylinder 42 moves axially in the material cylinder 41. The sliding guide rail 36 is arranged along the width direction of the frame 10. The first mounting plate 20 and the third mounting plate 31 are located on the same side of the sliding guide rail 36. The length of the sliding guide rail 36 is greater than the distance between the first mounting plate 20 and the third mounting plate 31. The piston rod of the receiving cylinder 42 is inserted into the receiving cylinder 41. The sliding seat 40 is fixedly connected to the lifting cylinder 43 with the piston rod facing upward. One end of the receiving cylinder 41 near the first mounting plate 20 is rotatably connected to the sliding seat 40. The other end of the receiving cylinder 41 is fixedly connected to the piston rod of the lifting cylinder 43. The fourth drive mechanism, the fifth drive cylinder, the receiving cylinder 42 and the lifting cylinder 43 are electrically connected to the controller.

[0048] In this embodiment, the fourth drive mechanism includes a motor 44 fixedly mounted on the frame 10, a gear (not shown in the figure) fixedly connected to the output shaft of the motor 44, and a rack 46 meshing with the gear. The rack 46 is fixedly connected to the side of the receiving and feeding plate 38 away from the first mounting plate 20. The rack 46 is arranged along the width direction of the frame 10. The controller controls the motor 44 to start. The rotation of the motor 44 drives the gear to rotate. The rotation of the gear drives the rack 46 to move. The movement of the rack 46 drives the receiving and feeding plate 38 fixedly connected to the rack 46 to move, thereby realizing the reciprocating motion of the receiving and feeding cylinder 41.

[0049] The lower end face of the second mounting plate 27 is provided with a groove 47, which extends through the second mounting plate 27 along the length of the frame 10. The outer peripheral wall of the blanking cylinder 21 is provided with a second limiting ring 48 arranged coaxially with the blanking cylinder 21. The distance between the two side walls of the groove 47 is greater than the outer diameter of the blanking cylinder 21, and the distance between the two side walls of the groove 47 is less than the outer diameter of the second limiting ring 48. When the blanking cylinder 21 rotates to a horizontal position, the blanking cylinder 21 flips and passes through the second mounting plate 27. The controller controls the second drive cylinder 29 to move, causing the second mounting plate 27 to move away from the first mounting plate 20. This causes the side of the second limiting ring 48 near the blanking cylinder 24 to abut against the side of the second mounting plate 27 near the unloading cylinder 28, resulting in a relatively good fixing effect.

[0050] The end of the extrusion cylinder 32 away from the third mounting plate 31 is connected to the discharge pipe 52. The inner diameter of the discharge pipe 52 gradually decreases from the end of the discharge pipe 52 connected to the extrusion cylinder 32 to the corresponding other end, so that the billet after extrusion comes out from the discharge pipe 52 and the extrusion operation is completed.

[0051] A working platform 53 is set up next to the frame 10. It should be noted that the working platform 53 is a conventional working platform, which will not be described in detail here. It is convenient for the staff to add billets to the billet drum 21.

[0052] Before use, the controller first controls the first drive cylinder 26 to move the blanking cylinder 24 so that it does not block the blanking cylinder 21. Similarly, the controller controls the third drive cylinder 35 to move the extrusion cylinder 33 so that it does not block the extrusion cylinder 32. The controller controls the tilting cylinder 30 to move, and the piston rod of the tilting cylinder 30 retracts, so that the blanking cylinder 21 is in a vertical state. During use, powder is applied to the blanking cylinder 21. The controller controls the first drive cylinder 26 to move, and the piston rod of the first drive cylinder 26 extends, causing the blanking cylinder 30 to move to the corresponding position on the blanking cylinder 21. Then, the controller controls the blanking cylinder 24 to move, and the piston rod of the blanking cylinder 24 extends, causing the first circular pressing block 25 to be inserted into the blanking cylinder. 21. To prevent powder from falling from the top of the forming cylinder during rotation, the controller controls the tilting cylinder 30 to move, extending the piston rod of the tilting cylinder 30 to make the forming cylinder 21 horizontal. The second drive cylinder 29 retracts, fixing the second limiting ring 48 of the forming cylinder 21 against the second mounting plate 27. Then, the controller controls the forming cylinder 30 and the unloading cylinder 28 to move. The piston rods of the first circular pressing block 25 and the unloading cylinder 28 are inserted into the forming cylinder 21 to form the material. After forming, the piston rod of the forming cylinder 24 retracts, causing the first circular pressing block 25 to be removed from the forming cylinder 21. The controller controls the first drive cylinder 26 to move the forming cylinder 24 so that it does not block the forming cylinder 21. The controller controls the piston rod of the fifth drive cylinder to extend, causing the sliding seat 40 to rise to the position corresponding to the blanking cylinder 21. The piston rod of the lifting cylinder 43 extends, so that the receiving cylinder 41 and the blanking cylinder 21 are on the same axis. The stripping cylinder 28 continues to extend, so that the blank after being punched moves from the blanking cylinder 21 to the receiving cylinder 41. The controller controls the piston rod of the lifting cylinder 43 to retract, so that the blank after being punched falls completely into the receiving cylinder 41. The piston rod of the fifth drive cylinder retracts, causing the sliding seat 40 to descend. The controller controls the motor 44 to start. The motor 44 rotates, driving the gear to rotate. The gear rotates, driving the rack 46 to move. The rack 46 moves, driving the receiving plate 38, which is fixedly connected to the rack 46, to move. The moving cylinder drives the receiving and feeding cylinder 41 to move to the position corresponding to the extrusion cylinder 32. The piston rod of the lifting cylinder 43 extends so that the receiving and feeding cylinder 41 and the extrusion cylinder 32 are on the same axis. The controller controls the receiving cylinder 32 to extend so that the bent billet moves from the receiving and feeding cylinder 41 into the extrusion cylinder 32. The controller controls the motor 44 to start so that the receiving and feeding cylinder 41 moves to the position corresponding to the bending cylinder 21. The controller controls the third drive cylinder 35 so that the extrusion cylinder 33 moves to the position corresponding to the extrusion cylinder 32. The controller controls the movement of the extrusion cylinder 33 so that the second circular pressing block 34 is inserted into the extrusion cylinder 32 and the bent billet is extruded from the discharge pipe 52. This cycle is repeated.

[0053] The present invention has been described in detail above with reference to the accompanying drawings. However, the embodiments of the present invention are not limited to the above embodiments. Those skilled in the art can make various modifications to the present invention based on the prior art, and these modifications all fall within the protection scope of the present invention.

Claims

1. A blanking and extrusion machine for the production of polytetrafluoroethylene, characterized in that, The device includes a frame and a controller fixedly mounted on the frame. A first mounting plate is rotatably connected to the frame. The rotation axis between the first mounting plate and the frame is arranged parallel to the width direction of the frame. A blanking cylinder is provided on the first mounting plate, penetrating the first mounting plate and arranged perpendicular to it. A first limiting ring is provided on the inner side wall of the blanking cylinder and arranged coaxially with the blanking cylinder. A disc is placed inside the blanking cylinder and abuts against the first limiting ring. A blanking cylinder with a piston rod that moves along the axial direction of the blanking cylinder is horizontally slidably connected to the first mounting plate. A first circular pressure block is fixedly connected to the piston rod of the blanking cylinder. A first driving cylinder for driving the blanking cylinder to slide relative to the first mounting plate is provided on the first mounting plate. A vertically arranged second mounting plate is horizontally slidably connected to the frame. A stripping cylinder with a piston rod horizontally arranged and facing the first mounting plate is fixedly connected to the second mounting plate. A second driving cylinder is provided on the second mounting plate for driving the second mounting plate to slide relative to the frame. The first mounting plate and the second mounting plate are arranged along the length direction of the frame. A tilting cylinder is provided on the frame at a position between the first mounting plate and the second mounting plate. The piston rod of the tilting cylinder is hinged to the first mounting plate, and the cylinder body of the tilting cylinder is hinged to the frame. The hinge axis of the piston rod of the tilting cylinder and the first mounting plate is closer to the second mounting plate relative to the rotation axis of the first mounting plate and the frame. The horizontal position of the hinge axis of the piston rod of the tilting cylinder and the first mounting plate is higher than the horizontal position of the rotation axis of the first mounting plate and the frame. The first driving cylinder, the second driving cylinder, the blanking cylinder, and the stripping cylinder are electrically connected to the controller. When the blanking cylinder rotates to a horizontal position, the blanking cylinder, the blanking cylinder, and the stripping cylinder are located on the same straight line.

2. The extrusion machine for polytetrafluoroethylene production according to claim 1, characterized in that, A vertically arranged third mounting plate is fixedly connected to the frame. The first mounting plate and the third mounting plate are arranged along the width direction of the frame. An extrusion cylinder is provided on the third mounting plate, penetrating the third mounting plate and arranged perpendicular to the third mounting plate. An extrusion cylinder with a horizontally arranged piston rod is slidably connected to the third mounting plate. A second circular pressure block is fixedly connected to the piston rod of the extrusion cylinder. A third drive cylinder is also provided on the third mounting plate for driving the extrusion cylinder to slide relative to the third mounting plate. The third drive cylinder and the extrusion cylinder are respectively electrically connected to the controller.

3. The extrusion machine for polytetrafluoroethylene production according to claim 2, characterized in that, The frame has a feeding assembly located on the side of the first mounting plate away from the second mounting plate. The feeding assembly includes a sliding guide rail on the frame, a sliding block slidably connected to the sliding guide rail, a feeding plate fixedly connected to the sliding block, a fourth drive mechanism for driving the feeding plate to slide, a sliding column vertically slidably connected to the feeding plate, a sliding seat fixedly connected to the top of the sliding column, a fifth drive cylinder for driving the sliding seat to rise and fall, a feeding cylinder arranged on the sliding seat along the length of the frame, and a piston rod fixedly installed at the end of the feeding cylinder away from the first mounting plate, with the piston rod along the axis of the feeding cylinder. A receiving and feeding cylinder moves in the direction of movement. The sliding guide rail is arranged along the width direction of the frame. The first mounting plate and the third mounting plate are located on the same side of the sliding guide rail. The length of the sliding guide rail is greater than the distance between the first mounting plate and the third mounting plate. The piston rod of the receiving and feeding cylinder is inserted into the receiving and feeding cylinder. A lifting cylinder with the piston rod facing upward is fixedly connected to the sliding seat. One end of the receiving and feeding cylinder near the first mounting plate is rotatably connected to the sliding seat. The other end of the receiving and feeding cylinder is fixedly connected to the piston rod of the lifting cylinder. The fourth drive mechanism, the fifth drive cylinder, the receiving and feeding cylinder, and the lifting cylinder are respectively electrically connected to the controller.

4. The extrusion machine for polytetrafluoroethylene production according to claim 3, characterized in that, The fourth drive mechanism includes a motor fixedly mounted on the frame, a gear fixedly connected to the output shaft of the motor, and a rack meshing with the gear. The rack is fixedly connected to the side of the receiving and feeding plate away from the first mounting plate, and the rack is arranged along the width direction of the frame.

5. A blanking and extrusion machine for polytetrafluoroethylene production according to claim 1, characterized in that, The lower end face of the second mounting plate is provided with a groove, which penetrates the second mounting plate along the length of the frame. The outer peripheral wall of the blanking cylinder is provided with a second limiting ring arranged coaxially with the blanking cylinder. The distance between the two side walls of the groove is greater than the outer diameter of the blanking cylinder, and the distance between the two side walls of the groove is less than the outer diameter of the second limiting ring.

6. The extrusion machine for polytetrafluoroethylene production according to claim 1, characterized in that, The first mounting plate is provided with two first guide rails arranged parallel to the width direction of the frame. The blanking cylinder is located between the two first guide rails. Each first guide rail is slidably connected to a first slider. Each first slider is fixedly connected to the same first fixing plate through a first cylinder. The blanking cylinder is fixedly mounted on the first fixing plate. The first fixing plate is provided with a first through hole for the piston rod of the blanking cylinder to pass through.

7. A blanking and extrusion machine for polytetrafluoroethylene production according to claim 2, characterized in that, The end of the extrusion cylinder away from the third mounting plate is connected to a discharge pipe, and the inner diameter of the discharge pipe gradually decreases from the end of the discharge pipe connected to the extrusion cylinder to the corresponding other end.

8. A preform extrusion machine for polytetrafluoroethylene production according to claim 1, characterized in that, A work platform is set up next to the frame.

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