Polytetrafluoroethylene gasket trimming device

Abstract

The utility model belongs to the production technology field of polytetrafluoroethylene gasket, specifically provide a kind of polytetrafluoroethylene gasket trimming device, including workbench, support material table, transfer subassembly and cutting subassembly, two support material tables are oppositely arranged in the both sides of workbench, and one of them is used to place the workpiece that has not been trimmed, and the other support material table is used to place the workpiece that has been trimmed. Transfer subassembly includes first track, moving frame, first driving part and two clamping mechanisms, clamping mechanism can clamp and release workpiece, first driving part drives moving frame to move along first track, in the moving frame moving process, one of clamping mechanisms can transfer the workpiece that has not been trimmed from the supporting plate to clamp, and the other clamping mechanism can transfer the workpiece that has been trimmed from clamp to another supporting plate. When moving frame drives cutting subassembly to move above clamp, clamp drives workpiece to rotate, and cutting subassembly removes burr.

Description

Technical Field

[0001] This application belongs to the field of polytetrafluoroethylene gasket production technology, specifically a polytetrafluoroethylene gasket trimming device. Background Technology

[0002] Polytetrafluoroethylene (PTFE) gaskets are ring-shaped gaskets made from polytetrafluoroethylene (PTFE). They have properties such as insulation, high temperature resistance, and corrosion resistance, and are widely used as sealing elements for pipes, valves, reagent containers, and other equipment.

[0003] Currently, there are two main methods for producing PTFE gaskets in the industry. One method involves filling PTFE powder into a mold cavity, pressing it into the shape of a gasket using a press, and then sintering and cooling to solidify the gasket. The other method involves first pressing a tubular workpiece using a mold, and then cutting gaskets of appropriate thickness from the tubular workpiece using a lathe or saw. The advantage of the first method is that no raw material is wasted, but the disadvantage is that the molded gaskets may have quality defects such as protrusions and burrs on the edges. The advantage of the second method is that the edges of the gasket can be automatically chamfered using a lathe tool during turning, but the disadvantage is that turning the workpiece generates chips, leading to material waste.

[0004] Regarding the production method of the first type of polytetrafluoroethylene gasket mentioned above, in order to eliminate quality defects such as protrusions and burrs, after the gasket is taken out of the mold, it is necessary to arrange personnel to use blades to trim the edges. At present, there is a lack of automated or semi-automated equipment in the industry that can realize the above steps, and it is mainly done manually, which is quite labor-intensive and time-consuming. Utility Model Content

[0005] Based on the above-mentioned technical problems, this application provides a polytetrafluoroethylene gasket trimming device to solve the technical problem that manual removal of edge burrs is required when producing polytetrafluoroethylene gaskets by molding in the prior art.

[0006] To achieve the above objectives, the technical solution adopted in this application is: to provide a polytetrafluoroethylene gasket trimming device, comprising: The worktable has fixtures for holding the workpiece; Two material support platforms are arranged opposite each other on both sides of the worktable. Each material support platform includes a pallet and a lifting mechanism. The pallet is horizontally arranged, and the lifting mechanism is used to drive the pallet to move vertically. The two pallets and the worktable are located on the same horizontal straight line. A transfer assembly includes a first track, a movable frame, a first drive member, and two clamping mechanisms. The first track is horizontally arranged along the line connecting the pallet and the clamp. The first drive member drives the movable frame to move along the first track. The two clamping mechanisms are spaced apart from each other on the movable frame along the length of the first track, and the distance between the two clamping mechanisms is equal to the distance between the pallet and the clamp. The cutting assembly is disposed on the movable frame and located between the two clamping mechanisms.

[0007] In one possible implementation, the support platform further includes: A horizontally oriented track is provided and perpendicular to the first track. The elevator is positioned on the horizontally oriented track. The material support platform includes multiple pallets, which are spaced apart along the length of the horizontally oriented track. A translation drive mechanism is used to drive the elevator to move along the translation track.

[0008] In one possible implementation, the upper surface of the pallet is provided with a plurality of limiting rods spaced apart along the circumferential direction, and the limiting rods are vertically arranged.

[0009] In one possible implementation, the gripping mechanism is a vacuum suction cup.

[0010] In one possible implementation, the transfer component further includes: A slider, slidably engaged with a first track, a first drive member connected to the slider, the slider having a second track arranged vertically, and a movable frame slidably engaged with the second track; and The second driving component, located on the slider, is used to drive the movable frame to move vertically.

[0011] In one possible implementation, the cutting assembly includes: A cutter is positioned between the two clamping mechanisms; and The third driving component, located on the movable frame, is used to drive the cutter to move vertically.

[0012] In one possible implementation, the cutter has two angled cutting edges, which are respectively used to abut against the inner and outer edges of the workpiece.

[0013] In one possible implementation, the elevator is a worm gear elevator.

[0014] In one possible implementation, the clamp is a vacuum rotary suction cup, with the suction surface of the vacuum rotary suction cup being horizontal and facing upwards.

[0015] In one possible implementation, the first drive element is an electric telescopic pole.

[0016] Compared with the prior art, the advantages of the polytetrafluoroethylene gasket trimming device provided in this application are: The PTFE gasket trimming device provided in this application includes a worktable, a support platform, a transfer assembly, and a cutting assembly. Two support platforms are positioned opposite each other on either side of the worktable. One support platform is used to place untrimmed workpieces, and the other is used to place trimmed workpieces. The transfer assembly includes a first track, a moving frame, a first drive unit, and two clamping mechanisms. The clamping mechanisms can clamp and release workpieces. The first drive unit drives the moving frame to move along the first track. During the movement of the moving frame, one clamping mechanism can transfer the untrimmed workpiece from the support plate to the fixture, and the other clamping mechanism can transfer the trimmed workpiece from the fixture to another support plate. The lifting mechanism can adjust the height of the support plate to facilitate the clamping or placement of workpieces. When the moving frame moves the cutting assembly above the fixture, the fixture rotates the workpiece, and the cutting assembly trims and removes burrs from the entire circumference of the workpiece.

[0017] This application achieves automated workpiece clamping, transfer, and trimming through a worktable, a material support table, a transfer assembly, and a cutting assembly, reducing manual intervention. The fixed spacing between the two clamping mechanisms in the transfer assembly ensures accurate workpiece positioning during transfer, avoiding errors. The cutting assembly can replace manual trimming of the workpiece edges, making it suitable for automated trimming of PTFE gaskets produced by molding, and helping to save manpower. Attached Figure Description

[0018] To more clearly illustrate the technical solutions in the embodiments of this application, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this application. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0019] Figure 1 A schematic diagram of the polytetrafluoroethylene gasket trimming device provided in the embodiments of this application. Figure 1 ; Figure 2 This is a structural diagram of the material support platform; Figure 3 A schematic diagram of the polytetrafluoroethylene gasket trimming device provided in the embodiments of this application. Figure 2 ; Figure 4 An internal cross-sectional view of the polytetrafluoroethylene gasket trimming device provided in the embodiments of this application; Figure 5 for Figure 4 Enlarged view of part A in the middle; Explanation of reference numerals in the attached figures: 10. Workbench; 11. Fixture; 20. Material support platform; 21. Pallet; 211. Limiting rod; 22. Elevator; 23. Translation track; 24. Translation drive mechanism; 30. Transfer assembly; 31. First track; 32. Moving frame; 33. First drive component; 34. Clamping mechanism; 35. Slider; 36. Second drive component; 40. Cutting assembly; 41. Cutting blade; 411. Blade; 42. Third drive component. Detailed Implementation

[0020] To make the technical problems, technical solutions, and beneficial effects to be solved by this application clearer, the following detailed description is provided in conjunction with the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative and are not intended to limit the scope of this application.

[0021] It should be noted that when a component is referred to as being "fixed to" or "set on" another component, it can be directly on or indirectly on that other component. When a component is referred to as being "connected to" another component, it can be directly connected to or indirectly connected to that other component.

[0022] It should be understood that the terms "length", "width", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this application and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this application.

[0023] Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of this application, "multiple" or "several" means two or more, unless otherwise explicitly specified.

[0024] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this invention pertains.

[0025] Please refer to the following: Figures 1 to 5 The following describes the polytetrafluoroethylene gasket trimming device provided in the embodiments of this application.

[0026] This application provides a polytetrafluoroethylene gasket trimming device, including a worktable 10, two material support tables 20, a transfer assembly 30, and a cutting assembly 40.

[0027] The worktable 10 has a clamp 11 for holding the workpiece, which is a molded polytetrafluoroethylene (PTFE) gasket. The worktable 10 provides support and can be made of steel or aluminum alloy, requiring sufficient rigidity and stability. The clamp 11 is used to hold and fix the workpiece and can rotate the workpiece around a vertical axis. The specific type of clamp 11 is not limited; for example, a mechanical electric chuck or a vacuum rotary chuck can be used. When the clamp 11 is a vacuum rotary chuck, the suction surface of the vacuum rotary chuck is horizontal and facing upwards.

[0028] The workpiece's rotation can be driven by the servo motor of the fixture 11 itself. The fixture 11 can drive the workpiece to rotate at least one revolution, ensuring that the entire outer edge of the workpiece can be trimmed by the cutting component 40.

[0029] Two support platforms 20 are positioned opposite each other on both sides of the worktable 10. Each support platform 20 includes a pallet 21 and a lifting mechanism 22. The pallet 21 is horizontally positioned, and the lifting mechanism 22 drives the pallet 21 to move vertically. The two pallets 21 and the worktable 10 are located on the same horizontal line. The pallet 21 can be made of stainless steel or engineering plastics (such as nylon), and its surface should be relatively smooth to reduce wear. Multiple workpieces are stacked on the pallet 21. The lifting mechanism 22 can be a worm gear lift, hydraulic cylinder, pneumatic cylinder, or electric push rod, used to drive the pallet 21 to move vertically.

[0030] Two support platforms 20 are positioned opposite each other on both sides of the worktable 10, with the pallet 21 and the worktable 10 on the same horizontal line for easy workpiece transfer. The two support platforms 20 are used to store workpieces to be processed and processed workpieces, respectively. The lifting platform 22 is adjustable in height to facilitate the operation of the transfer assembly 30. The function of the lifting platform 22 is to raise or lower the pallet 21, ensuring that the uppermost workpiece and the upper surface of the fixture 11 are at the same horizontal level for easy transfer.

[0031] The transfer assembly 30 includes a first track 31, a movable frame 32, a first drive member 33, and two clamping mechanisms 34. The first track 31 is horizontally arranged along the line connecting the pallet 21 and the clamp 11. The first drive member 33 is used to drive the movable frame 32 to move along the first track 31. The two clamping mechanisms 34 are spaced apart on the movable frame 32 along the length of the first track 31, and the distance between the two clamping mechanisms 34 is equal to the distance between the pallet 21 and the clamp 11.

[0032] The first track 31 can be a linear guide or a ball screw, made of steel or aluminum alloy. The first drive component 33 can be a servo motor, stepper motor, or cylinder, used to drive the moving frame 32 to move along the first track 31. The moving frame 32 can be a lightweight alloy frame to reduce weight, and there are no restrictions on the specific shape and structure of the moving frame 32. The gripping mechanism 34 can be a pneumatic gripper or a vacuum suction cup, as long as it can smoothly grip the workpiece. When using a vacuum suction cup, the workpiece is adsorbed by negative pressure, which will not cause damage to the workpiece. The vacuum suction cup can be configured with multiple suction points to increase the adsorption force and prevent it from falling. The distance between the two gripping mechanisms 34 is equal to the distance between the pallet 21 and the fixture 11. When one gripping mechanism 34 picks up an unprocessed workpiece from the pallet 21, the other gripping mechanism 34 can pick up a processed workpiece from the fixture 11.

[0033] The cutting assembly 40 is mounted on the movable frame 32 and located between the two clamping mechanisms 34. The cutting assembly 40 uses a fixed blade. During the rotation of the workpiece driven by the clamp 11, the blade abuts against the inner and outer edges of the workpiece to cut the inner and outer edges of the workpiece and remove burrs or protrusions.

[0034] It should be noted that the PTFE gasket trimming device provided in this embodiment is used to trim the upper inner and outer edges of the workpiece. When burrs are also present on the bottom of the workpiece, the processed workpiece needs to be rotated 180° and placed back onto the support plate 21 for supporting the unprocessed workpiece. The above operation is repeated to trim the bottom edge of the workpiece. The rotation and transfer of the workpiece can be done manually. When the number of workpieces accumulates to a certain amount (e.g., 50), multiple workpieces are rotated and transferred to the corresponding support plate 21 for secondary trimming.

[0035] Compared with the prior art, the beneficial effects of the polytetrafluoroethylene gasket trimming device provided in this application embodiment are: The PTFE gasket trimming device provided in this embodiment includes a worktable 10, a support platform 20, a transfer assembly 30, and a cutting assembly 40. Two support platforms 20 are positioned opposite each other on both sides of the worktable 10. One support platform 20 is used to place untrimmed workpieces, and the other support platform 20 is used to place trimmed workpieces. The transfer assembly 30 includes a first track 31, a moving frame 32, a first drive member 33, and two clamping mechanisms 34. The clamping mechanisms 34 can clamp and release workpieces. The first drive member 33 drives the moving frame 32 to move along the first track 31. During the movement of the moving frame 32, one clamping mechanism 34 can transfer an untrimmed workpiece from the support plate 21 to a fixture 11, and the other clamping mechanism 34 can transfer a trimmed workpiece from the fixture 11 to another support plate 21. The lifting mechanism 22 can adjust the height of the support plate 21 to facilitate the clamping or placement of workpieces. When the moving frame 32 moves the cutting assembly 40 above the fixture 11, the fixture 11 rotates the workpiece, and the cutting assembly 40 can trim the edge burrs of the entire circumference of the workpiece and remove the burrs.

[0036] This embodiment of the application achieves automatic workpiece clamping, transfer, and trimming through a worktable 10, a material support table 20, a transfer assembly 30, and a cutting assembly 40, reducing manual intervention. The two clamping mechanisms 34 in the transfer assembly 30 are spaced at a fixed distance to ensure accurate workpiece positioning during transfer and avoid errors. The cutting assembly 40 can replace manual trimming of the workpiece edges, making it suitable for automated trimming of polytetrafluoroethylene gaskets produced by molding. Workers only need to move the workpiece before and after processing, helping to save manpower.

[0037] Please see Figure 1 , Figure 2 and Figure 3 In some possible embodiments, the support platform 20 also includes a translation track 23 and a translation drive mechanism 24.

[0038] The translation track 23 is horizontal and perpendicular to the first track 31. It can be a linear guide or a V-shaped guide, and the translation track 23 should be made of wear-resistant material. The lifting platform 22 is located on the translation track 23. The material support platform 20 includes multiple pallets 21 (e.g., 2-4), which are spaced apart along the length of the translation track 23. Each pallet 21 can independently carry a workpiece, thus increasing the number of workpieces that a pallet 21 can carry. The translation drive mechanism 24 is used to drive the lifting platform 22 to move along the translation track 23, so that different pallets 21 are in the gripping position of the clamping mechanism 34.

[0039] Please see Figure 1 and Figure 3In some possible embodiments, a plurality of limiting rods 211 are spaced apart along the circumferential direction on the upper surface of the pallet 21. The limiting rods 211 are vertically arranged, and the stacking height of the workpieces should not exceed the height of the top of the limiting rods 211. The limiting rods 211 can be made of stainless steel or rigid plastic and are vertically fixed to the upper surface of the pallet 21. The limiting rods 211 are spaced apart along the circumferential direction (e.g., 4-8 rods) to prevent the workpieces from moving or shifting on the pallet 21 and to ensure accurate positioning.

[0040] When it is necessary to adapt to workpieces of different diameters, the limiting rod 211 can be designed to be adjustable, such as by connecting it to the support plate 21 through a threaded connection or a sliding groove, and the position can be adjusted according to the size of the workpiece.

[0041] Please see Figure 1 and Figure 3 In some possible embodiments, the transfer assembly 30 further includes a slider 35 and a second drive member 36. The slider 35 is slidably engaged with a first track 31, and the first drive member 33 is connected to the slider 35 for driving the slider 35 to move along the first track 31. The slider 35 has a second track arranged vertically, and the moving frame 32 is slidably engaged with the second track; the second drive member 36 is disposed on the slider 35 for driving the moving frame 32 to move along the vertical second track.

[0042] In this embodiment, the second driving member 36 is used to drive the slider 35 and the moving frame 32 and clamping mechanism 34 on the slider 35 to move up and down, thereby changing the height of the clamping mechanism 34 so that the clamping mechanism 34 can smoothly transfer the workpiece from the pallet 21. The slider 35 can be made of cast iron or aluminum alloy and slides in conjunction with the first track 31. The slider 35 has a second track arranged in the vertical direction, which can be a linear guide rail or a guide post. The second track ensures the stability of the moving frame 32 in vertical movement, improving the transfer accuracy and repeatability.

[0043] The second drive element 36 can be a pneumatic cylinder, a hydraulic cylinder, or an electric push rod. The second drive element 36 is mounted on the slider 35 and is used to drive the moving frame 32 to move vertically, providing precise control in the vertical direction.

[0044] Please see Figure 4 and Figure 5 In some possible embodiments, the cutting assembly 40 includes a cutter 41 and a third drive member 42. The cutter 41 is disposed between two clamping mechanisms 34; the third drive member 42 is disposed on the moving frame 32 for driving the cutter 41 to move vertically.

[0045] In this embodiment, the cutter 41 is used to cut the polytetrafluoroethylene gasket. The cutter 41 can be made of high-speed steel, cemented carbide, or ceramic material, and its shape is usually sheet-like or block-like. The cutter 41 is located between the two clamping mechanisms 34 and is used to trim the inner and outer rings of the workpiece on the fixture 11.

[0046] When trimming is required, the third drive unit 42 drives the cutter 41 to move downwards, and the cutter 41 directly contacts the edge of the workpiece. During the rotation of the workpiece, the blade 411 of the cutter 41 can remove burrs and protrusions.

[0047] The third drive unit 42 can be a cylinder or a linear stepper motor. It is fixedly mounted on the moving frame 32 and is used to drive the cutter 41 to move vertically. Changing the extension length of the third drive unit 42 can control the cutting depth, achieving precise trimming.

[0048] The cutter 41 can be designed to be replaceable for easy maintenance. A blower can be installed near the cutter 41 to blow away the cutting debris and cool the cutter 41 to prevent it from overheating.

[0049] Please see Figure 5 The cutter 41 has two blades 411 set at an angle. The two blades 411 are used to trim the inner and outer edges of the workpiece, respectively, and can complete the trimming operation of the inner and outer rings at the same time.

[0050] It should be noted that the coordinated automated control of multiple moving parts in this device (such as the lifting platform 22, the translation drive mechanism 24, the first drive component 33, the second drive component 36, the vacuum suction cup, and the vacuum rotary suction cup) can be achieved using a programmable logic controller (PLC) or an industrial computer (IPC) as the core controller. The controller receives feedback signals from various sensors (such as position and pressure sensors) according to a preset program, and then sends commands to actuators such as motors (servo / stepper motors), cylinders, and vacuum generators, thereby precisely coordinating the sequence of actions such as workpiece transfer, positioning, clamping, rotation, and trimming. This multi-axis linkage automation system based on a central controller is a mature and widely used existing technology in fields such as machining and automated production lines, and can be understood and implemented by those skilled in the art.

[0051] It is understood that the parts in the above embodiments can be freely combined or deleted to form different combined embodiments. The specific contents of each combined embodiment will not be repeated here. After this description, it can be considered that the present utility model specification has recorded each combined embodiment and can support different combined embodiments.

[0052] The above description is only a preferred embodiment of the present utility model and is not intended to limit the present utility model. Any modifications, equivalent substitutions and improvements made within the spirit and principles of the present utility model should be included within the protection scope of the present utility model.

Claims

1. A polytetrafluoroethylene gasket trimming device, characterized in that, include: The worktable (10) has a clamp (11) for holding the workpiece. Two material support platforms (20) are arranged opposite each other on both sides of the workbench (10). Each material support platform (20) includes a pallet (21) and a lifting mechanism (22). The pallet (21) is horizontally arranged, and the lifting mechanism (22) is used to drive the pallet (21) to move vertically. The two pallets (21) and the workbench (10) are located on the same horizontal straight line. The transfer assembly (30) includes a first track (31), a movable frame (32), a first drive member (33), and two clamping mechanisms (34). The first track (31) is horizontally arranged along the line connecting the pallet (21) and the clamp (11). The first drive member (33) drives the movable frame (32) to move along the first track (31). The two clamping mechanisms (34) are spaced apart on the movable frame (32) along the length of the first track (31), and the distance between the two clamping mechanisms (34) is equal to the distance between the pallet (21) and the clamp (11). The cutting assembly (40) is disposed on the movable frame (32) and located between the two clamping mechanisms (34).

2. The polytetrafluoroethylene gasket trimming device according to claim 1, characterized in that, The material support platform (20) also includes: A horizontal track (23) is provided, perpendicular to the first track (31). A lifting platform (22) is located on the horizontal track (23). The material support platform (20) includes multiple pallets (21), which are spaced apart along the length of the horizontal track (23). Translation drive mechanism (24) is used to drive the elevator (22) to move along the translation track (23).

3. The polytetrafluoroethylene gasket trimming device according to claim 1, characterized in that, The upper surface of the pallet (21) is provided with a plurality of limiting rods (211) spaced apart along the circumferential direction, and the limiting rods (211) are vertically arranged.

4. The polytetrafluoroethylene gasket trimming device according to claim 1, characterized in that, The clamping mechanism (34) is a vacuum suction cup.

5. The polytetrafluoroethylene gasket trimming device according to claim 4, characterized in that, The transfer component (30) further includes: A slider (35) is slidably engaged with the first track (31), a first drive member (33) is connected to the slider (35), the slider (35) has a second track arranged vertically, and the moving frame (32) is slidably engaged with the second track; and The second driving member (36), located on the slider (35), is used to drive the moving frame (32) to move vertically along the second track.

6. The polytetrafluoroethylene gasket trimming device according to claim 1, characterized in that, The cutting assembly (40) includes: A cutter (41) is positioned between the two clamping mechanisms (34); and The third driving member (42) is provided on the moving frame (32) for driving the cutter (41) to move vertically.

7. The polytetrafluoroethylene gasket trimming device according to claim 6, characterized in that, The cutter (41) has two blades (411) set at an angle, which are respectively used to abut against the inner edge and the outer edge of the workpiece.

8. The polytetrafluoroethylene gasket trimming device according to claim 1, characterized in that, The elevator (22) is a worm gear elevator (22).

9. The polytetrafluoroethylene gasket trimming device according to claim 1, characterized in that, The clamp (11) is a vacuum rotary suction cup, and the suction surface of the vacuum rotary suction cup is horizontal and facing upward.

10. The polytetrafluoroethylene gasket trimming device according to claim 1, characterized in that, The first driving component (33) is an electric telescopic rod.

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