A cutting die for expanded polytetrafluoroethylene sheets

Abstract

The application discloses a cutting die for expanded polytetrafluoroethylene plate, which comprises a base, a support fixed on the base, a rotating rod penetrating through the support and rotationally connected with the support, the other end of the rotating rod being rotationally connected with the support, a driving mechanism installed on the support and used for driving the rotating rod to rotate intermittently, a through groove arranged at the upper end of the support, a bolt and nut assembly slidably connected in the through groove and capable of being positioned, the bolt and nut assembly being fixedly connected with the upper end of a sliding block, and the rotating rod being sleeved with the sliding block movably connected with the rotating rod. The application can cut the plate at equal intervals without marking the plate by workers, greatly improves the work efficiency, clamps the plate, does not need manual positioning of the plate, increases the stability of the plate, reduces the labor of the workers, and can adjust the position of the cutter to meet the cutting of plates with different lengths and the cutting accuracy.

Description

Technical Field

[0001] This invention relates to the field of cutting mold technology, and more particularly to a cutting mold for expanded polytetrafluoroethylene (ePTFE) sheets. Background Technology

[0002] Expanded PTFE sheets are sheets of a certain size formed by stretching PTFE dispersion resin, followed by stacking and hot pressing. Expanded PTFE sheets formed by stretching have a microporous fiber structure and have the best mechanical strength in the stretching direction.

[0003] Expanded PTFE sheets are commonly used in medical plastic surgery. Before application, the raw material of the expanded PTFE sheet needs to be cut into finished sheets of specified width and length. Traditional machine cutting methods use high-speed rotating blades for cutting, which produces a lot of burrs on the cut surface. Therefore, manual cutting is usually used nowadays. In the manual cutting process, the operator uses a steel ruler to make measurements and marks, and then presses and holds the raw material sheet with a fixing plate. At the same time, the operator uses a cutting blade to cut the raw material sheet.

[0004] Regarding the aforementioned technologies, the applicant believes that prolonged manual pressing and fixing of the raw material sheet can easily lead to fatigue for operators, thereby increasing the instability of cutting the raw material sheet. Summary of the Invention

[0005] The purpose of this invention is to solve the above-mentioned technical problems by providing a cutting mold for expanded polytetrafluoroethylene (ePTFE) sheets.

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

[0007] A cutting mold for expanded polytetrafluoroethylene (ePTFE) sheets includes a base, a bracket fixed on the base, a rotating rod rotatably connected to the bracket, the other end of the rotating rod being rotatably connected to the bracket, a drive mechanism for intermittently rotating the rotating rod mounted on the bracket, a through groove at the upper end of the bracket, a slidably positioned bolt and nut assembly slidably connected within the through groove, the bolt and nut assembly being fixedly connected to the upper end of a slider, a slider movably connected to the rotating rod, an electric push rod fixed at the bottom of the slider, an adjustable cutter at the output end of the electric push rod, a control mechanism for controlling the operation of the electric push rod mounted on the bracket, a guide groove fixed at the upper end of the base, a guide block slidably connected within the guide groove, a first screw rotatably connected within the guide groove, the first screw passing through the guide block and threadedly connected to it, a transmission mechanism between the rotating rod and the first screw, a cutting plate fixed at the upper end of the guide block, and a sheet positioning mechanism mounted on the cutting plate.

[0008] Preferably, the drive mechanism includes a mounting plate fixed on a bracket, a motor mounted on the mounting plate, a drive rod fixedly connected to the output end of the motor, a first bevel gear fixedly connected to the bottom of the drive rod, and a second bevel gear fixed on the rotating rod, wherein the first bevel gear and the second bevel gear mesh with each other.

[0009] Preferably, the first bevel gear lacks continuously arranged gear teeth.

[0010] Preferably, the output end of the electric push rod is fixedly connected to an L-shaped plate, the inner top of the L-shaped plate is slidably connected to a slide plate, the cutter is fixedly set at the bottom of the slide plate, a second screw is rotatably connected to the slide plate, the second screw passes through the L-shaped plate and is threadedly connected to it, and a handle is fixedly connected to the second screw.

[0011] Preferably, the control mechanism includes a fixed block fixed on a bracket, the fixed block having an inner cavity, a movable block slidably connected within the inner cavity, a first electrical contact fixed on the movable block, a second electrical contact fixed on the inner cavity, the first and second electrical contacts being arranged opposite to each other, a connecting block fixedly connected to the movable block, the connecting block passing through the fixed block and slidably disposed therewith, a spring fixedly fixed on the movable block, the other end of the spring being fixedly connected to the inner wall of the inner cavity, the spring being sleeved on the outside of the connecting block, and a driving block fixedly fixed to the driving rod, the driving block being positionally matched with the connecting block.

[0012] Preferably, both the first and second electrical contacts are made of copper, and the first and second electrical contacts are electrically connected to the electric push rod.

[0013] Preferably, the driving block is a circular block, the driving block and the driving rod are coaxially arranged, and the upper part of the driving block is recessed.

[0014] Preferably, the transmission mechanism includes a first transmission rod fixed on a rotating rod, the first transmission rod passing through the bracket and rotatably connected thereto, a second transmission rod fixed on the first screw, the second transmission rod passing through the base and rotatably connected thereto, a first transmission wheel fixed on the first transmission rod, a second transmission wheel fixed on the second transmission rod, and the first transmission wheel and the second transmission wheel connected by a belt.

[0015] Preferably, the plate positioning mechanism includes a fixed frame fixed on the cutting plate, a third screw threadedly connected to the fixed frame, a clamping plate rotatably connected to the bottom of the third screw, the clamping plate slidingly abutting against the fixed frame, and a handwheel fixed to the upper end of the third screw.

[0016] Compared with the prior art, the beneficial effects of this invention are as follows:

[0017] 1. Place the board on the cutting board, and then the worker manually turns the handwheel. The rotation of the handwheel drives the third screw to rotate, which can move the clamping plate downward and clamp the board. This eliminates the need for manual limit on the board, increases the stability of the board, and reduces the workload of the workers.

[0018] 2. Under the transmission of the first drive wheel, the second drive wheel and the belt, the second drive rod can be rotated, which in turn can make the first screw rotate. Since the guide block cannot rotate in the guide groove, the cutting plate, the fixing frame and the plate can move, and move intermittently at equal distances. When stationary, the plate can be cut, and the plate can be cut to the same length. There is no need for staff to measure and mark the cutting, which reduces the workload of the staff and improves the cutting efficiency.

[0019] 3. Due to the different lengths of the plates, the operator can control the bolt and nut assembly to adjust the position of the slider and the cutter to meet the cutting needs of plates of different sizes. In this way, the position of the bolt and nut assembly can be quickly adjusted and fixed. Then, the operator turns the handle to drive the second screw to rotate, thereby moving the slide and the cutter. The position of the cutter can be precisely adjusted.

[0020] In summary, this invention allows for equidistant cutting of boards without requiring workers to mark them, greatly improving work efficiency. Furthermore, it allows for clamping of the boards, eliminating the need for manual positioning and increasing board stability, while reducing worker workload. The position of the cutter can also be adjusted to accommodate cutting boards of different lengths and with varying precision. Attached Figure Description

[0021] Figure 1 This is a schematic diagram of the structure of a cutting mold for expanded polytetrafluoroethylene sheet proposed in this invention;

[0022] Figure 2 This is a top view of the drive block in a cutting mold for expanded polytetrafluoroethylene sheet according to the present invention.

[0023] Figure 3 This is a schematic diagram of the control mechanism in a cutting mold for expanded polytetrafluoroethylene (ePTFE) sheet proposed in this invention.

[0024] Figure 4 This is a schematic diagram of the fixing frame in a cutting mold for expanded polytetrafluoroethylene (ePTFE) sheet proposed in this invention.

[0025] In the diagram: 1. Base, 2. Bracket, 3. Motor, 4. Mounting plate, 5. Drive rod, 6. First bevel gear, 7. Second bevel gear, 8. Rotating rod, 9. Slider, 10. Through slot, 11. Bolt and nut assembly, 12. Electric push rod, 13. L-shaped plate, 14. Second screw, 15. Handle, 16. Slide plate, 17. Cutter, 18. Cutting plate, 19. Fixing bracket, 20. Clamping plate, 21. Third screw, 22. Handwheel, 23. First transmission rod, 24. First transmission wheel, 25. Second transmission rod, 26. Second transmission wheel, 27. Guide groove, 28. First screw, 29. Guide block, 30. Drive block, 31. Fixing block, 32. Inner cavity, 33. Moving block, 34. First electrical contact, 35. Second electrical contact, 36. Connecting block, 37. Spring, 38. Belt. Detailed Implementation

[0026] The technical solutions of the present invention will be clearly and completely described below with reference to the accompanying drawings of the embodiments of the present invention. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments.

[0027] Reference Figures 1-4 A cutting mold for expanded polytetrafluoroethylene (ePTFE) sheet includes a base 1, a bracket 2 fixed on the base 1, a rotating rod 8 rotatably connected to the bracket 2, the other end of the rotating rod 8 being rotatably connected to the bracket 2, a drive mechanism for intermittently rotating the rotating rod 8 being mounted on the bracket 2, the drive mechanism including a mounting plate 4 fixed on the bracket 2, a motor 3 mounted on the mounting plate 4, a drive rod 5 fixedly connected to the output end of the motor 3, a first bevel gear 6 fixedly connected to the bottom of the drive rod 5, a second bevel gear 7 fixedly fixed on the rotating rod 8, the first bevel gear 6 and the second bevel gear 7 meshing, the first bevel gear 6 lacks continuously arranged gear teeth, that is, when the first bevel gear 6 rotates continuously, it will rotate intermittently with the second bevel gear 7;

[0028] The upper end of the bracket 2 is provided with a through groove 10, and a positioning bolt and nut assembly 11 is slidably connected in the through groove 10. The nut is tightened and abuts against the upper end of the bracket 2, which can fix the position of the slider 9. The bolt and nut assembly 11 is fixedly connected to the upper end of the slider 9. The slider 9 is movably connected to the rotating rod 8. The slider 9 and the rotating rod 8 can rotate and slide. An electric push rod 12 is fixedly fixed at the bottom of the slider 9. An adjustable cutter 17 is provided at the output end of the electric push rod 12. An L-shaped plate 13 is fixedly connected to the output end of the electric push rod 12. A sliding plate 16 is slidably connected to the inner top of the L-shaped plate 13. The cutter 17 is fixedly set at the bottom of the sliding plate 16. A second screw 14 is rotatably connected to the sliding plate 16. The second screw 14 passes through the L-shaped plate 13 and is threadedly connected to it. A handle 15 is fixedly connected to the second screw 14.

[0029] The bracket 2 is equipped with a control mechanism for controlling the operation of the electric push rod 12. The control mechanism includes a fixed block 31 fixed to the bracket 2. The fixed block 31 has an inner cavity 32. A movable block 33 is slidably connected inside the inner cavity 32. A first electrical contact 34 is fixed on the movable block 33, and a second electrical contact 35 is fixed on the inner cavity 32. The first electrical contact 34 and the second electrical contact 35 are arranged opposite to each other. A connecting block 36 is fixedly connected to the movable block 33. The connecting block 36 passes through the fixed block 31 and is slidably arranged therewith. A spring 37 is fixedly attached, with the other end of the spring 37 fixedly connected to the inner wall of the inner cavity 32. The spring 37 is sleeved on the outside of the connecting block 36. A driving block 30 is fixedly attached to the driving rod 5. The driving block 30 is positioned to cooperate with the connecting block 36. The first electrical contact 34 and the second electrical contact 35 are both made of copper. The first electrical contact 34 and the second electrical contact 35 are electrically connected to the electric push rod 12. The driving block 30 is a circular block. The driving block 30 is coaxially arranged with the driving rod 5. The upper part of the driving block 30 is recessed.

[0030] A guide groove 27 is fixed to the upper end of the base 1. A guide block 29 is slidably connected in the guide groove 27. A first screw 28 is rotatably connected in the guide groove 27. The first screw 28 passes through the guide block 29 and is threadedly connected to it. A transmission mechanism is provided between the rotating rod 8 and the first screw 28. The transmission mechanism includes a first transmission rod 23 fixed on the rotating rod 8. The diameter of the first transmission wheel 24 is larger than the diameter of the second transmission wheel 26. The first transmission rod 23 passes through the bracket 2 and is rotatably connected to it. A second transmission rod 25 is fixed on the first screw 28. The second transmission rod 25 passes through the base 1 and is rotatably connected to it. A first transmission wheel 24 is fixed on the first transmission rod 23. A second transmission wheel 26 is fixed on the second transmission rod 25. The first transmission wheel 24 and the second transmission wheel 26 are connected by a belt 38.

[0031] A cutting plate 18 is fixed to the upper end of the guide block 29. A plate positioning mechanism is installed on the cutting plate 18. The plate positioning mechanism includes a fixing frame 19 fixed on the cutting plate 18. A third screw 21 threadedly connected to the fixing frame 19 is provided through the fixing frame 19. A pressing plate 20 is rotatably connected to the bottom of the third screw 21. The pressing plate 20 slides against the fixing frame 19. A handwheel 22 is fixed to the upper end of the third screw 21.

[0032] When using this invention, the board is placed on the cutting board 18, and then the operator manually rotates the handwheel 22. The rotation of the handwheel 22 drives the third screw 21 to rotate, thereby moving the clamping plate 20 downward and clamping the board. This eliminates the need for manual positioning of the board, increases the stability of the board, and reduces the workload of the operator.

[0033] Then, the motor 3 is started. The motor 3 drives the drive rod 5, drive block 30, and first bevel gear 6 to rotate. The first bevel gear 6 drives the second bevel gear 7 to rotate. The first bevel gear 6 drives the second bevel gear 7 to rotate intermittently. The rotating rod 8 rotates and drives the first transmission rod 23 to rotate. Under the transmission of the first transmission wheel 24, the second transmission wheel 26, and the belt 38, the second transmission rod 25 can be rotated, thereby enabling the first screw 28 to rotate. Since the guide block 29 cannot rotate in the guide groove 27, the cutting plate 18, the fixing frame 19, and the plate are moved, and the movement is intermittent and equidistant.

[0034] At this time, the arc surface of the drive block 30 abuts against the connecting block 36, thereby driving the connecting block 36, the moving block 33, and the first electrical contact 34 to move. The first electrical contact 34 abuts against the second electrical contact 35. At this time, the electric push rod 12 is energized, and the electric push rod 12 drives the L-shaped plate 13 and the cutter 17 to move down to cut the plate. Then, the drive block 30 no longer abuts against the connecting block 36. Under the action of the spring 37, the first electrical contact 34 and the second electrical contact 35 can be separated. The electric push rod 12 is de-energized and reset. Then, the first bevel gear 6 and the second bevel gear 7 mesh, driving the moving block 33 to move again. In this way, the slider 9 moves intermittently and cuts the plate when stationary. The plate can be cut to the same length without the need for workers to measure and mark the cut, thus reducing the workload of workers and improving cutting efficiency.

[0035] Because the length of the plates varies, the operator can control the bolt and nut assembly 11 to adjust the position of the slider 9 and the cutter 17 to meet the cutting needs of plates of different sizes. In this way, the position of the bolt and nut assembly 11 can be quickly adjusted and fixed. Then, the operator can turn the handle 15 to drive the second screw 14 to rotate, thereby moving the slide plate 16 and the cutter 17, and the position of the cutter 17 can be precisely adjusted.

[0036] The above description is only a preferred embodiment of the present invention, but the scope of protection of the present invention is not limited thereto. Any equivalent substitutions or modifications made by those skilled in the art within the scope of the technology disclosed in the present invention, based on the technical solution and inventive concept of the present invention, should be covered within the scope of protection of the present invention.

Claims

1. A cutting mold for expanded polytetrafluoroethylene (ePTFE) sheets, comprising a base (1), characterized in that, A bracket (2) is fixed on the base (1). A rotating rod (8) is rotatably connected to the bracket (2). The other end of the rotating rod (8) is rotatably connected to the bracket (2). A drive mechanism for intermittently rotating the rotating rod (8) is installed on the bracket (2). A through groove (10) is provided at the upper end of the bracket (2). A positioning bolt and nut assembly (11) is slidably connected in the through groove (10). The bolt and nut assembly (11) is fixedly connected to the upper end of the slider (9). A slider (9) is movably connected to the rotating rod (8). An electric push rod (12) is fixed at the bottom of the slider (9). An adjustable cutter (17) is provided at the output end of the electric push rod (12). The bracket (2) is equipped with a control mechanism for controlling the operation of the electric push rod (12). The upper end of the base (1) is fixed with a guide groove (27). A guide block (29) is slidably connected in the guide groove (27). A first screw (28) is rotatably connected in the guide groove (27). The first screw (28) passes through the guide block (29) and is threadedly connected to it. A transmission mechanism is provided between the rotating rod (8) and the first screw (28). A cutting plate (18) is fixed at the upper end of the guide block (29). A plate positioning mechanism is installed on the cutting plate (18). The driving mechanism includes a mounting plate (4) fixed on the bracket (2). A motor (3) is installed on the mounting plate (4). The output end of the motor (3) is fixed. A drive rod (5) is connected to the bottom of the drive rod (5), and a first bevel gear (6) is fixedly connected to the bottom of the drive rod (5). A second bevel gear (7) is fixed on the rotating rod (8). The first bevel gear (6) and the second bevel gear (7) mesh with each other. The control mechanism includes a fixed block (31) fixed on the bracket (2). The fixed block (31) has an inner cavity (32). A moving block (33) is slidably connected in the inner cavity (32). A first electrical contact (34) is fixed on the moving block (33). A second electrical contact (35) is fixed on the inner cavity (32). The first electrical contact (34) and the second electrical contact (35) are arranged opposite to each other. A connecting block (36) is fixedly connected to the moving block (33). 6) The fixed block (31) is slidably disposed therethrough. A spring (37) is fixed on the movable block (33). The other end of the spring (37) is fixedly connected to the inner wall of the inner cavity (32). The spring (37) is sleeved on the outside of the connecting block (36). A driving block (30) is fixed on the driving rod (5). The driving block (30) is positioned in conjunction with the connecting block (36). The first electrical contact (34) and the second electrical contact (35) are both made of copper. The first electrical contact (34) and the second electrical contact (35) are electrically connected to the electric push rod (12). The driving block (30) is a circular block. The driving block (30) and the driving rod (5) are coaxially disposed. The upper part of the driving block (30) is recessed.

2. The cutting mold for expanded polytetrafluoroethylene sheet according to claim 1, characterized in that, The first bevel gear (6) lacks continuously arranged gear teeth.

3. The cutting mold for expanded polytetrafluoroethylene sheet according to claim 1, characterized in that, The output end of the electric push rod (12) is fixedly connected to an L-shaped plate (13), and a slide plate (16) is slidably connected to the inner top of the L-shaped plate (13). The cutter (17) is fixedly set at the bottom of the slide plate (16). A second screw (14) is rotatably connected to the slide plate (16). The second screw (14) passes through the L-shaped plate (13) and is threadedly connected to it. A handle (15) is fixedly connected to the second screw (14).

4. The cutting mold for expanded polytetrafluoroethylene sheet according to claim 1, characterized in that, The transmission mechanism includes a first transmission rod (23) fixed on a rotating rod (8), the first transmission rod (23) passing through the bracket (2) and rotatably connected thereto, a second transmission rod (25) fixed on the first screw (28), the second transmission rod (25) passing through the base (1) and rotatably connected thereto, a first transmission wheel (24) fixed on the first transmission rod (23), a second transmission wheel (26) fixed on the second transmission rod (25), and the first transmission wheel (24) and the second transmission wheel (26) connected by a belt (38).

5. The cutting mold for expanded polytetrafluoroethylene sheet according to claim 1, characterized in that, The plate positioning mechanism includes a fixed frame (19) fixed on the cutting plate (18), a third screw (21) threadedly connected to the fixed frame (19), a clamping plate (20) rotatably connected to the bottom of the third screw (21), the clamping plate (20) slidingly abutting against the fixed frame (19), and a handwheel (22) fixed to the upper end of the third screw (21).

Images