Blanking and extruding machine for polytetrafluoroethylene production

Abstract

The utility model relates to the technical field of blank-making and strip-pressing machines, in particular to a blank-making and strip-extruding machine for polytetrafluoroethylene production, which comprises a rack, a controller, a box body and a working table, a blank-making material barrel is arranged on the working table, a strip-extruding material barrel is arranged on the working table, and a first guide rail group and a second guide rail group are arranged on the working table. A first driving mechanism is further arranged on the workbench, and a second driving mechanism is further arranged on the workbench. The first guide rail group is matched with the first driving mechanism to enable the first mounting plate to move back and forth along the first guide rail, and the second guide rail group is matched with the second driving mechanism to enable the second mounting plate to move back and forth along the second guide rail, so that the height of a blank after blank forming is not limited, and the height space occupied by the blank forming and strip extruding machine is reduced; the occupied height space is relatively small; and the strip extrusion quality is stable.

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] Because the PTFE blanks after preforming have poor bending properties, they cannot be bent and guided from the preforming cylinder to the extrusion cylinder. Therefore, the length of the blank that can be taken out after preforming is limited by the distance between the pressure block of the piston rod connected to the preforming cylinder and the worktable when it is in the upper limit position. When a long strip is required, either the distance between the pressure block of the piston rod connected to the preforming cylinder and the worktable when it is in the upper limit position needs to be increased, but this will result in a relatively high height of the preforming extruder and a relatively large space occupied; or the blank needs to be cut into multiple small segments and then put into the extrusion cylinder. However, there will be a break between two adjacent preformed blanks. The more breaks occur, the more unstable the quality of the product extruded by the extruder becomes.

[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 extrusion machine for the production of polytetrafluoroethylene that occupies relatively little height space and has stable extrusion quality.

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

[0007] A preform extrusion machine for polytetrafluoroethylene (PTFE) production includes a frame, a controller, a housing fixedly connected to the frame, and a worktable fixedly connected to the housing. The frame is horizontally arranged. A preform cylinder is arranged on the worktable, passing through both the worktable and the housing. An extrusion cylinder is arranged on the worktable next to the preform cylinder, also passing through both the worktable and the housing. Both the preform cylinder and the extrusion cylinder are vertically arranged. A first guide rail group and a second guide rail group are provided on the worktable. The first guide rail group includes two guide rails arranged parallel to the width direction of the worktable. The worktable includes a first slider slidably connected to each of the first guide rails and a first mounting plate fixedly connected to each of the first sliders. A first driving mechanism for driving one of the first sliders to slide relative to the first guide rails is also provided on the worktable. The blanking cylinder is located between two of the first guide rails. The second guide rail group includes two second guide rails arranged parallel to the width direction of the worktable, second sliders slidably connected to each of the second guide rails, and second mounting plates fixedly connected to each of the second sliders. A first driving mechanism for driving one of the second sliders to slide relative to the first guide rails is also provided on the worktable. For the second driving mechanism for sliding the second guide rail, the extrusion cylinder is located between the two second guide rails. A blanking cylinder with its piston rod facing downwards is fixedly mounted on the first mounting plate. The first mounting plate has a first through hole for the piston of the blanking cylinder to pass through. A first circular pressure block is fixedly connected to the end of the piston rod of the blanking cylinder away from the piston of the blanking cylinder. A strip extrusion cylinder with its piston rod facing downwards is fixedly mounted on the second mounting plate. The second mounting plate has a second through hole for the piston rod of the strip extrusion cylinder to pass through. A first circular pressure block is fixedly connected to the end of the piston rod of the strip extrusion cylinder away from the piston of the strip extrusion cylinder. A second circular pressure block is fixedly connected to the first circular pressure block. The outer diameter of the first circular pressure block matches the inner diameter of the blanking cylinder. The outer diameter of the second circular pressure block matches the inner diameter of the extrusion cylinder. A stripping cylinder with its piston rod facing upward is fixedly connected to the lower end of the blanking cylinder. A third circular pressure block inserted into the blanking cylinder is fixedly connected to the end of the piston rod of the stripping cylinder away from the piston of the stripping cylinder. The outer diameter of the third circular pressure block matches the inner diameter of the blanking cylinder. The first drive mechanism, the second drive mechanism, the blanking cylinder, the extrusion cylinder, and the stripping cylinder are all electrically connected to the controller.

[0008] As an improvement of this utility model, each of the first sliders is fixedly connected to a first fixing plate, and each of the first fixing plates is integrally connected to two first cylinders arranged at intervals along the width direction of the housing. The upper end of each of the first cylinders is integrally connected to a first external thread segment. The outer diameter of each of the first cylinders is larger than the outer diameter of the corresponding first external thread segment. The first mounting plate is simultaneously slidably sleeved on each of the first external thread segments. Each of the first external thread segments is threadedly connected to a first nut and a second nut. Each of the first nuts is located on the same plane, and each of the second nuts is located on the same plane. The first mounting plate is clamped between the first nut and the second nut.

[0009] As an improvement of this utility model, each of the second sliders is fixedly connected to a second fixing plate, and each of the second fixing plates is integrally connected to two second cylinders arranged at intervals along the width direction of the housing. The upper end of each of the second cylinders is integrally connected to a second external thread segment. The outer diameter of each of the second cylinders is larger than the outer diameter of the corresponding second external thread segment. The second mounting plate is simultaneously slidably sleeved on each of the second external thread segments. Each of the second external thread segments is threadedly connected to a third nut and a fourth nut. Each of the third nuts is located on the same plane, and each of the fourth nuts is located on the same plane. The second mounting plate is clamped between the third nuts and the fourth nuts.

[0010] As an improvement of this utility model, a guide rod is provided inside the cylinder of the extrusion cylinder. The guide rod is arranged parallel to the piston rod of the extrusion cylinder. One end of the guide rod is located inside the cylinder of the extrusion cylinder, and the other end of the guide rod is located outside the cylinder of the extrusion cylinder. The end of the guide rod inside the cylinder of the extrusion cylinder is fixedly connected to the piston of the extrusion cylinder, and the end of the guide rod outside the cylinder of the extrusion cylinder is fixedly connected to the piston rod of the extrusion cylinder through a fixing sleeve.

[0011] As an improvement of this utility model, the fixed sleeve is provided with a third through hole for the piston rod of the extrusion cylinder to pass through, and the fixed sleeve is provided with a fourth through hole for the guide rod to pass through, and the third through hole and the fourth through hole are connected.

[0012] As an improvement of this utility model, the lower end of the extrusion cylinder is connected to a discharge pipe, and the diameter of the discharge pipe gradually decreases from one end connected to the extrusion cylinder to the corresponding other end.

[0013] As an improvement of this utility model, a receiving bucket is provided inside the box at a position below the discharge pipe.

[0014] As an improvement of this utility model, both the first driving mechanism and the second driving mechanism are first hydraulic cylinders.

[0015] As an improvement of this utility model, the stripping cylinder is a double-section cylinder.

[0016] As an improvement of this utility model, the controller is disposed on one of the side walls of the housing.

[0017] By adopting the above technical solution, this utility model has the following beneficial effects:

[0018] This utility model uses a first guide rail group and a first drive mechanism to make the first mounting plate move back and forth along the first guide rail, and uses a second guide rail group and a second drive mechanism to make the second mounting plate move back and forth along the second guide rail. This ensures that the height of the billet after extrusion is not limited, reduces the height space occupied by the extrusion machine, occupies relatively little height space, and ensures stable extrusion quality. Attached Figure Description

[0019] Figure 1 This is a front view of a preform extrusion machine for the production of polytetrafluoroethylene according to the present invention;

[0020] Figure 2 This is a side view of a preform extrusion machine for the production of polytetrafluoroethylene according to the present invention.

[0021] Figure 3 This is a top view of a preform extrusion machine for the production of polytetrafluoroethylene according to the present invention;

[0022] Figure 4 This is a schematic diagram of the extrusion cylinder of this utility model;

[0023] Figure 5 This is a schematic diagram of the structure of the fixing sleeve of this utility model.

[0024] The markings in the diagram correspond as follows:

[0025] 10 - Rack; 20 - Cabinet;

[0026] 21-Workbench; 22-Blank material cylinder;

[0027] 23-Extrusion bar; 24-First guide rail;

[0028] 25 - First slider; 26 - First mounting plate;

[0029] 27 - Second guide rail; 28 - Second slider;

[0030] 29-Second mounting plate; 30-Burning cylinder;

[0031] 31-First circular pressing block; 32-Extrusion cylinder;

[0032] 33-Second circular pressing block; 34-Discharge cylinder;

[0033] 35 - Third circular pressure block; 36 - First fixing plate;

[0034] 37 - First cylinder; 38 - First external thread segment;

[0035] 39 - First nut; 40 - Second nut;

[0036] 41-Second fixing plate; 42-Second cylinder;

[0037] 43 - Second external thread section; 44 - Third nut;

[0038] 45 - Fourth nut; 46 - Guide rod;

[0039] 47 - Fixing sleeve; 48 - Third through hole;

[0040] 49 - Fourth through hole; 50 - Discharge pipe. 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," 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 (PTFE), including a frame 10, a controller, a housing 20 fixedly connected to the frame 10, and a worktable 21 fixedly connected to the housing 20. It should be noted that the controller is a conventional PLC controller (or MCU controller, or microprocessor, or control chip), which has the conventional function of analyzing and comparing input signals to output corresponding control signals, which will not be described in detail here. The controller is set on one side wall of the housing 20. The frame 10 is arranged horizontally. A blanking cylinder 22 is arranged on the worktable 21, passing through the worktable 21 and the housing 20 in sequence. An extrusion cylinder 23 is arranged on the worktable 21 next to the blanking cylinder 22, passing through the worktable 21 and the housing 20 in sequence. Both the blanking cylinder 22 and the extrusion cylinder 23 are arranged vertically.

[0044] The workbench 21 is provided with a first guide rail group and a second guide rail group. The first guide rail group includes two first guide rails 24 arranged parallel to the width direction of the workbench 21, first sliders 25 slidably connected to each first guide rail 24, and a first mounting plate 26 fixedly connected to each first slider 25. The workbench 21 is also provided with a first driving mechanism for driving one of the first sliders 25 to slide relative to the first guide rail 24. The blanking cylinder 22 is located between the two first guide rails 24, and the blanking cylinder 22 is located at the end near one end of the first guide rail 24. The second guide rail group includes two second guide rails 27 arranged parallel to the width direction of the workbench 21, and slidably connected to each second guide rail 27. The second slider 28 and the second mounting plate 29 are fixedly connected to each of the second sliders 28. The worktable 21 is also provided with a second driving mechanism for driving one of the second sliders 28 to slide relative to the second guide rail 27. The extrusion cylinder 23 is located between the two second guide rails 27 and is located at the end of one end close to the second guide rail. Specifically, both the first driving mechanism and the second driving mechanism are first hydraulic cylinders. A blanking cylinder 30 with the piston rod facing downward is fixedly mounted on the first mounting plate 26. The first mounting plate 26 has a first through hole (not shown in the figure) through which the piston rod of the blanking cylinder 30 passes. The end of the piston rod of the blanking cylinder 30 away from the piston of the blanking cylinder 30 is fixedly connected to a first circular... A first circular pressure block 31 is fixedly mounted on a second mounting plate 29, and a first circular pressure block 33 is fixedly connected to the end of the extrusion cylinder 30 with the piston rod facing downward. The second mounting plate 29 has a second through hole (not shown in the figure) through which the piston rod of the extrusion cylinder 32 passes. The outer diameter of the first circular pressure block 31 matches the inner diameter of the blanking cylinder 30, and the outer diameter of the second circular pressure block 33 matches the inner diameter of the extrusion cylinder 32. The lower end of the blanking cylinder 30 is fixedly connected to a descrambling cylinder 34 with the piston rod facing upward. The descrambling cylinder 34 is a double-section cylinder. The end of the piston rod of the descrambling cylinder 34 away from the piston of the descrambling cylinder 34 is fixedly connected to a part inserted inside the blanking cylinder 30. The outer diameter of the third circular pressing block 35 matches the inner diameter of the blanking cylinder 30. The first drive mechanism, the second drive mechanism, the blanking cylinder 30, the extrusion cylinder 32, and the descrambling cylinder 34 are electrically connected to the controller. Through the cooperation of the first guide rail group and the first drive mechanism, the first mounting plate 26 moves back and forth along the first guide rail 24. Through the cooperation of the second guide rail group and the second drive mechanism, the second mounting plate 29 moves back and forth along the second guide rail 27. This ensures that the height of the blank after blanking is not restricted, reducing the height space occupied by the blanking extrusion machine. The height space occupied is relatively small and the extrusion quality is stable. Furthermore, by setting up a double-section cylinder, the height of the housing is reduced, thereby reducing the space occupied by the blanking extrusion machine.

[0045] Each first slider 25 is fixedly connected to a first fixing plate 36. Each first fixing plate 36 is integrally connected to two first cylinders 37 arranged at intervals along the width direction of the worktable 21. The upper end of each first cylinder 37 is integrally connected to a first external thread section 38. The outer diameter of each first cylinder 37 is larger than the outer diameter of the corresponding first external thread section 38. The first mounting plate 26 is simultaneously slidably sleeved on each first external thread section 38. Each first external thread section 38 is threadedly connected to a first nut 39 and a second nut 40. Each first nut 39 is located on the same plane, and each second nut 40 is located on the same plane. The first mounting plate 26 is clamped between the first nut 39 and the second nut 40. By clamping the first mounting plate 26 between the first nut 39 and the second nut 40, the first mounting plate 26 is indirectly fixed to the first slider 25. The first driving mechanism drives the first slider 25 to slide, thereby moving the first mounting plate 26.

[0046] Each second slider 28 is fixedly connected to a second fixing plate 41. Each second fixing plate 41 is integrally connected to two second cylinders 42 arranged at intervals along the width direction of the worktable 21. The upper end of each second cylinder 42 is integrally connected to a second external thread section 43. The outer diameter of each second cylinder 42 is larger than the outer diameter of the corresponding second external thread section 43. The second mounting plate 29 is slidably sleeved on each second external thread section 43. Each second external thread section 43 is threadedly connected to a third nut 44 and a fourth nut 45. Each third nut 44 is located on the same plane, and each fourth nut 45 is located on the same plane. The second mounting plate 29 is clamped between the third nut 44 and the fourth nut 45. The second mounting plate 29 is indirectly fixed to the second slider 28 by being clamped between the third nut 44 and the fourth nut 45. The second drive mechanism drives the second slider 28 to slide, thereby moving the second mounting plate 29.

[0047] A guide rod 46 is provided inside the cylinder of the extrusion cylinder 32. The guide rod 46 is arranged parallel to the piston rod of the extrusion cylinder 32. One end of the guide rod 46 is located inside the cylinder of the extrusion cylinder 32, and the other end of the guide rod 46 is located outside the cylinder of the extrusion cylinder 32. The end of the guide rod 46 inside the cylinder of the extrusion cylinder 32 is fixedly connected to the piston of the extrusion cylinder 32, and the end of the guide rod 46 outside the cylinder of the extrusion cylinder 32 is fixedly connected to the piston rod of the extrusion cylinder 32 through a fixing sleeve 47. By providing the guide rod 46, the piston rod of the extrusion cylinder 32 is prevented from rotating during operation. Specifically, the fixing sleeve 47 has a third through hole 48 for the piston rod of the extrusion cylinder 32 to pass through, and a fourth through hole 49 for the guide rod 46 to pass through, and the third through hole 48 and the fourth through hole 49 are connected.

[0048] The lower end of the extrusion cylinder 32 is connected to the discharge pipe 50. The inner diameter of the discharge pipe 50 gradually decreases from one end connected to the extrusion cylinder 32 to the corresponding other end, so that the material coming out of the discharge pipe 50 is thinner. A receiving bucket (not shown in the figure) is provided inside the box 20 below the discharge pipe 50. The receiving bucket facilitates the collection of materials.

[0049] Before use, the controller first controls the first drive mechanism to move the blanking cylinder 30 to the end of the first guide rail 24 away from the blanking cylinder 22. Similarly, the controller controls the second drive mechanism to move the extrusion cylinder 32 to the end of the second guide rail 27 away from the extrusion cylinder 23. During use, powder is placed on the blanking cylinder 22. The controller controls the first drive mechanism to move the blanking cylinder 30 to the corresponding position on the blanking cylinder 22. Then, the controller controls the movement of the blanking cylinder 30 and the depressurization cylinder 34. The first circular pressing block 31 and the third circular pressing block 35 are respectively inserted into the blanking cylinder 22 to blank the material. After the blanking is completed, the controller controls the first drive mechanism to move the blanking cylinder 30 to the end of the first guide rail 24 away from the blanking cylinder 22. Then, the controller controls the descrambling cylinder to push the material upward at a uniform speed. The controller controls the movement of the blanking cylinder 30 and the descrambling cylinder 34 to remove the blanked material and put it into the extrusion cylinder 23. The controller controls the second drive mechanism to move the extrusion cylinder 32 to the corresponding position of the extrusion cylinder 23. The controller controls the movement of the extrusion cylinder 32, and the second circular pressing block 33 is inserted into the extrusion cylinder 23 to extrude the blanked material from the discharge pipe 50. Finally, the material is collected through the collection bucket.

[0050] 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 system includes a frame, a controller, a housing fixedly connected to the frame, and a worktable fixedly connected to the housing. The frame is horizontally arranged. A blanking cylinder is arranged on the worktable, passing sequentially through the worktable and the housing. An extrusion cylinder is arranged on the worktable next to the blanking cylinder, also passing sequentially through the worktable and the housing. Both the blanking cylinder and the extrusion cylinder are vertically arranged. A first guide rail group and a second guide rail group are provided on the worktable. The first guide rail group includes two first guide rails arranged parallel to the width direction of the worktable, first sliders slidably connected to each of the first guide rails, and first mounting plates fixedly connected to each of the first sliders. A first driving mechanism for driving one of the first sliders to slide relative to the first guide rails is also provided on the worktable. The blanking cylinder is located between the two first guide rails. The second guide rail group includes two second guide rails arranged parallel to the width direction of the worktable, second sliders slidably connected to each of the second guide rails, and second mounting plates fixedly connected to each of the second sliders. A second driving mechanism for driving one of the second sliders to slide relative to the second guide rails is also provided on the worktable. The second driving mechanism is actuated. The extrusion cylinder is located between two second guide rails. A blanking cylinder with its piston rod facing downwards is fixedly mounted on the first mounting plate. The first mounting plate has a first through hole for the piston of the blanking cylinder to pass through. A first circular pressure block is fixedly connected to the end of the piston rod of the blanking cylinder away from the piston. The second mounting plate has a piston rod facing downwards and a second through hole for the piston rod of the extrusion cylinder to pass through. A first circular pressure block is fixedly connected to the end of the piston rod of the extrusion cylinder away from the piston. The outer diameter of the first circular pressing block matches the inner diameter of the blanking cylinder, and the outer diameter of the second circular pressing block matches the inner diameter of the extrusion cylinder. A descrambling cylinder with its piston rod facing upward is fixedly connected to the lower end of the blanking cylinder. A third circular pressing block inserted into the blanking cylinder is fixedly connected to the end of the piston rod of the descrambling cylinder away from the piston of the descrambling cylinder. The outer diameter of the third circular pressing block matches the inner diameter of the blanking cylinder. The first drive mechanism, the second drive mechanism, the blanking cylinder, the extrusion cylinder, and the descrambling cylinder are all electrically connected to the controller.

2. The extrusion machine for polytetrafluoroethylene production according to claim 1, characterized in that, Each of the first sliders is fixedly connected to a first fixing plate. Each of the first fixing plates is integrally connected to two first cylinders arranged at intervals along the width direction of the housing. The upper end of each first cylinder is integrally connected to a first external thread segment. The outer diameter of each first cylinder is larger than the outer diameter of the corresponding first external thread segment. The first mounting plate is simultaneously slidably sleeved on each of the first external thread segments. Each of the first external thread segments is threadedly connected to a first nut and a second nut. Each of the first nuts is located on the same plane, and each of the second nuts is located on the same plane. The first mounting plate is clamped between the first nut and the second nut.

3. The extrusion machine for polytetrafluoroethylene production according to claim 1, characterized in that, Each of the second sliders is fixedly connected to a second fixing plate. Each of the second fixing plates is integrally connected to two second cylinders arranged at intervals along the width direction of the housing. The upper end of each of the second cylinders is integrally connected to a second external thread segment. The outer diameter of each of the second cylinders is larger than the outer diameter of the corresponding second external thread segment. The second mounting plate is simultaneously slidably sleeved on each of the second external thread segments. Each of the second external thread segments is threadedly connected to a third nut and a fourth nut. Each of the third nuts is located on the same plane, and each of the fourth nuts is located on the same plane. The second mounting plate is clamped between the third nuts and the fourth nuts.

4. The extrusion machine for polytetrafluoroethylene production according to claim 1, characterized in that, A guide rod is provided inside the cylinder of the extrusion cylinder. The guide rod is arranged parallel to the piston rod of the extrusion cylinder. One end of the guide rod is located inside the cylinder of the extrusion cylinder, and the other end of the guide rod is located outside the cylinder of the extrusion cylinder. The end of the guide rod inside the cylinder of the extrusion cylinder is fixedly connected to the piston of the extrusion cylinder, and the end of the guide rod outside the cylinder of the extrusion cylinder is fixedly connected to the piston rod of the extrusion cylinder through a fixing sleeve.

5. A preform extruder for polytetrafluoroethylene production according to claim 4, characterized in that, The fixed sleeve has a third through hole for the piston rod of the extrusion cylinder to pass through, and the fixed sleeve has a fourth through hole for the guide rod to pass through, and the third through hole and the fourth through hole are connected.

6. The extrusion machine for polytetrafluoroethylene production according to claim 1, characterized in that, The lower end of the extrusion cylinder is connected to a discharge pipe, and the inner diameter of the discharge pipe gradually decreases from one end connected to the extrusion cylinder to the corresponding other end.

7. A preform extruder for polytetrafluoroethylene production according to claim 6, characterized in that, A receiving hopper is installed inside the box, located below the discharge pipe.

8. A preform extrusion machine for polytetrafluoroethylene production according to claim 1, characterized in that, Both the first drive mechanism and the second drive mechanism are first hydraulic cylinders.

9. A preform extruder for polytetrafluoroethylene production according to claim 1, characterized in that, The unloading cylinder is a double-section cylinder.

10. A blanking and extrusion machine for polytetrafluoroethylene production according to claim 1, characterized in that, The controller is mounted on one of the side walls of the enclosure.

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