A self-aligning mold structure for polytetrafluoroethylene gaskets

Abstract

The utility model relates to a kind of self-aligning mould structure for polytetrafluoroethylene gasket, including workbench, support frame, lower mould and upper mould, support frame lower side is provided with floating mechanism, upper mould is set in the lower side of floating mechanism, floating mechanism includes fixed plate, spring and floating plate, fixed plate is set in support frame lower side, four main guide columns are fixedly installed in fixed plate lower side, four through slots are set in floating plate upper side, four through slots are fixedly installed with main guide sleeve, main guide column is slidably inserted in main guide sleeve, limit plate is fixedly installed in the lower end of main guide column, limit plate is located in floating plate lower side, spring is fixedly installed between fixed plate and floating plate.The utility model can drive upper mould to automatically adjust position when upper mould and lower mould exist slight misregistration due to installation error, so that the lower mould cavity of upper mould and lower mould is accurately aligned, ensure that upper mould can be accurately inserted into the lower mould cavity of lower mould.

Description

Technical Field

[0001] This utility model relates to the field of polytetrafluoroethylene gasket production technology, and in particular to a self-aligning mold structure for polytetrafluoroethylene gaskets. Background Technology

[0002] Polytetrafluoroethylene (PTFE), also known as Teflon, is a high molecular polymer made by polymerizing tetrafluoroethylene as a monomer. Its chemical formula is (C2F4)n. It has excellent heat and cold resistance and can be used for a long time at temperatures ranging from -180 to 260°C. This material is resistant to acids, alkalis, and various organic solvents. It is almost insoluble in all solvents. At the same time, PTFE has high temperature resistance and an extremely low coefficient of friction. Therefore, in addition to its lubricating properties, it has also become an ideal coating for easy-to-clean water pipe inner layers.

[0003] Polytetrafluoroethylene (PTFE) gaskets are high-performance sealing elements made from polytetrafluoroethylene resin through precision processing. PTFE possesses extremely high corrosion resistance, high and low temperature resistance, and excellent sealing performance, making it widely used in various industrial fields. Some PTFE gaskets require direct molding, while others have specific thickness requirements, necessitating molding. Gaskets produced using this method have good density and pressure resistance.

[0004] The existing PTFE gasket production molds have the following defects in actual use:

[0005] If assembly errors occur during the installation of existing molds, slight misalignment may occur between the upper and lower molds during use, reducing the mold closing accuracy. Under high pressure, PTFE powder may be forcibly squeezed out from the misaligned gaps, forming uncontrollable and uneven burrs, requiring further burr removal from the PTFE gasket. Utility Model Content

[0006] In view of the technical problem that existing molds, once assembly errors occur during installation, slight misalignment occurs between the upper and lower molds during use, reducing the mold closing accuracy. Under high pressure, PTFE powder is forcibly squeezed out from the misaligned gaps, forming uncontrollable and uneven burrs, requiring further burr removal from the PTFE gasket. This utility model provides a self-aligning mold structure for PTFE gaskets.

[0007] The technical solution adopted by this utility model is: a self-aligning mold structure for polytetrafluoroethylene gaskets, including a worktable, a support frame, a lower mold and an upper mold. A floating mechanism is provided on the lower side of the support frame, and the upper mold is located on the lower side of the floating mechanism. The floating mechanism includes a fixed plate, a spring and a floating plate. The fixed plate is located on the lower side of the support frame, and four main guide columns are fixedly installed on the lower side of the fixed plate. Four through slots are opened on the upper side of the floating plate, and a main guide sleeve is fixedly installed in each of the four through slots. The main guide columns are slidably inserted into the main guide sleeves. A limit plate is fixedly installed at the lower end of the main guide column. The limit plate is located on the lower side of the floating plate, and the spring is fixedly installed between the fixed plate and the floating plate.

[0008] Furthermore, a limiting block is fixedly installed on the lower side of the fixing plate, the number of springs corresponds to the number of the main guide columns, and the springs are sleeved around the main guide columns.

[0009] Furthermore, the support frame is fixedly installed on the upper side of the workbench, and a drive cylinder is fixedly installed on the upper side of the support frame, with the output end of the drive cylinder fixedly connected to the fixed plate.

[0010] Furthermore, two guide rods are fixedly installed between the support frame and the worktable, and guide slide plates are fixedly installed on both sides of the fixed plate, with the guide slide plates slidably connected to the guide rods.

[0011] Furthermore, the upper mold is fixedly installed on the lower side of the floating plate, four lower guide pillars are fixedly installed on the lower side of the floating plate, the lower mold is fixedly installed on the upper side of the workbench, four mounting slots are opened on the upper side of the lower mold, lower guide sleeves are fixedly installed in the mounting slots, and a tapered guide surface is provided on the circumference of the upper inner wall of the lower guide sleeve.

[0012] Furthermore, a discharge mechanism is provided between the lower mold and the worktable, and the discharge mechanism includes an electric telescopic rod, a connecting rod and a lifting plate.

[0013] Furthermore, the worktable has an installation groove on its upper side, the lower mold has a storage groove at the bottom of its inner wall, the connecting rod is fixedly connected to the lifting plate, the lifting plate is set in the storage groove, the electric telescopic rod is fixedly installed in the installation groove, and the output end of the electric telescopic rod is fixedly connected to the connecting rod.

[0014] The beneficial effects of this utility model are:

[0015] 1. This utility model uses a floating mechanism to automatically adjust the position of the upper mold when there is a slight misalignment between the upper and lower molds due to installation errors. This ensures that the lower mold cavities of the upper and lower molds are precisely aligned, allowing the upper mold to be accurately inserted into the lower mold cavity of the lower mold. This achieves automatic compensation for alignment errors and reduces flash after the PTFE gasket is molded.

[0016] 2. Secondly, through the discharge mechanism, the polytetrafluoroethylene gasket can be ejected from the lower mold cavity of the lower mold after it is molded, which facilitates the unloading operation of the polytetrafluoroethylene gasket by the workers, thereby improving the convenience and practicality of the mold.

[0017] 3. This utility model also uses guide rods and guide slides to guide the fixed plate when the drive cylinder moves the fixed plate, ensuring that the fixed plate can move stably, thereby improving the stability and smoothness of the fixed plate when it moves. Attached Figure Description

[0018] Figure 1 This is a three-dimensional view of the entire utility model;

[0019] Figure 2 This is an exploded view of the floating mechanism of this utility model;

[0020] Figure 3 This is an exploded view of the lower mold and worktable of this utility model;

[0021] Figure 4 This is a three-dimensional view of the lower mold of this utility model.

[0022] The following are marked in the diagram: 1. Workbench; 2. Support frame; 3. Drive cylinder; 4. Lower mold; 5. Floating mechanism; 6. Upper mold; 7. Fixed plate; 8. Main guide column; 9. Spring; 10. Floating plate; 11. Main guide sleeve; 12. Limiting block; 13. Lower guide column; 14. Limiting plate; 15. Guide rod; 16. Guide slide plate; 17. Mounting groove; 18. Lower guide sleeve; 19. Discharge mechanism; 20. Mounting groove; 21. Electric telescopic rod; 22. Lifting plate; 23. Storage groove; 24. Conical guide surface. Detailed Implementation

[0023] In the description of this utility model, it should be noted that the terms "front", "up", "down", "left", "right", "vertical", "horizontal", 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 utility model 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 utility model.

[0024] In the description of this utility model, it should be noted that, unless otherwise explicitly specified and limited, the terms "installation," "connection," and "joining" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal connection of two components. Those skilled in the art can understand the specific meaning of the above terms in this utility model based on the specific circumstances.

[0025] The following is in conjunction with the appendix Figures 1-4 The present invention will be further described below.

[0026] In order to solve the problems existing in the background art, this application proposes the following technical solution: a self-aligning mold structure for polytetrafluoroethylene gaskets.

[0027] The specific technical solution includes a workbench 1, a support frame 2, a lower mold 4, and an upper mold 6. A floating mechanism 5 is provided on the lower side of the support frame 2, and the upper mold 6 is located below the floating mechanism 5. The floating mechanism 5 includes a fixed plate 7, a spring 9, and a floating plate 10. The fixed plate 7 is located on the lower side of the support frame 2, and four main guide columns 8 are fixedly installed on the lower side of the fixed plate 7. The main guide columns 8 are vertically fixed on the fixed plate 7 and symmetrically distributed. Four through slots are opened on the upper side of the floating plate 10, and a main guide sleeve 11 is fixedly installed in each of the four through slots. The main guide column 8 is slidably inserted into the main guide sleeve 11. The inner hole of the main guide sleeve 11 and the outer diameter of the main guide column 8 are clearance-fitted, which allows the floating plate 10 to make horizontal micro-movements. A limit plate 14 is fixedly installed at the lower end of the main guide column 8. The limit plate 14 is located below the floating plate 10. The spring 9 is fixedly installed between the fixed plate 7 and the floating plate 10. The lower side of the fixed plate 7 is fixed. Limiting blocks 12 are installed. The number of springs 9 corresponds to the number of main guide columns 8, and the springs 9 are sleeved around the main guide columns 8. The support frame 2 is fixedly installed on the upper side of the workbench 1. A drive cylinder 3 is fixedly installed on the upper side of the support frame 2. The output end of the drive cylinder 3 is fixedly connected to the fixed plate 7. Two guide rods 15 are fixedly installed between the support frame 2 and the workbench 1. Guide slide plates 16 are fixedly installed on both sides of the fixed plate 7. The guide slide plates 16 are slidably connected to the guide rods 15. The upper mold 6 is fixedly installed on the lower side of the floating plate 10. Four lower guide columns 13 are fixedly installed on the lower side of the floating plate 10. The lower mold 4 is fixedly installed on the upper side of the workbench 1. Four mounting slots 17 are opened on the upper side of the lower mold 4. A lower guide sleeve 18 is fixedly installed in the mounting slot 17. A tapered guide surface 24 is provided on the circumference of the upper inner wall of the lower guide sleeve 18. The outer diameter of the lower guide column 13 and the inner diameter of the lower guide sleeve 18 are precisely slidingly fitted.

[0028] Reference Figure 3 and Figure 4As shown, a discharge mechanism 19 is provided between the lower mold 4 and the worktable 1. The discharge mechanism 19 includes an electric telescopic rod 21, a connecting rod, and a lifting plate 22. An installation groove 20 is provided on the upper side of the worktable 1, and a receiving groove 23 is provided at the bottom of the inner wall of the lower mold 4. The connecting rod is fixedly connected to the lifting plate 22, and the lifting plate 22 is set in the receiving groove 23. The electric telescopic rod 21 is fixedly installed in the installation groove 20, and the output end of the electric telescopic rod 21 is fixedly connected to the connecting rod. By activating the electric telescopic rod 21, the electric telescopic rod 21 can drive the connecting rod and the connecting rod to rise. After the polytetrafluoroethylene gasket is molded, the lifting plate 22 can push the polytetrafluoroethylene gasket out of the lower mold 4, which makes it convenient for the staff to unload the polytetrafluoroethylene gasket.

[0029] To ensure that those skilled in the art can fully understand the technical solution, this application provides the following overall overview:

[0030] In use, a certain amount of PTFE powder is filled into the lower cavity of the lower mold 4. Then, the drive cylinder 3 is activated, causing the fixed plate 7 to descend. The descent of the fixed plate 7 can drive the floating plate 10 and the upper mold 6 to descend via the spring 9 and the main guide column 8. When the fixed plate 7, floating plate 10, and upper mold 6 descend, the guide rod 15 on the lower side of the floating plate 10 can first contact the lower guide sleeve 18 on the upper side of the lower mold 4. When there is a slight misalignment between the upper mold 6 and the lower mold 4 due to installation errors, the tapered guide surface 24 of the lower guide sleeve 18 can still guide the guide rod 15 into the lower guide sleeve 18. At this time, when the guide rod 15 is inserted into the lower guide sleeve 18, it will generate a lateral force on the floating plate 10, thereby causing the floating plate 10 to move slightly horizontally. Since there is a gap between the main guide sleeve 11 and the main guide column 8, it can... This allows for a slight movement, while spring 9 allows floating plate 10 to tilt or translate slightly when subjected to this lateral force. This enables floating plate 10 to drive upper mold 6 to make a slight horizontal movement, allowing upper mold 6 to automatically adjust its position and precisely align with the lower mold cavity of lower mold 4. This ensures that upper mold 6 can be accurately inserted into the lower mold cavity of lower mold 4. Then, through the continuous downward pressure of drive cylinder 3, after upper mold 6 is inserted into the lower mold cavity, floating plate 10 moves upward against the thrust of spring 9 and compresses spring 9. After floating plate 10 abuts against limit block 12, floating plate 10, limit block 12 and fixed plate 7 form a rigid whole through hard contact. Then, through this rigid structure, pressure can be transmitted to upper mold 10, causing upper mold 6 to press.

[0031] All standard parts used in this utility model can be purchased from the market, and irregular parts can be customized according to the description and drawings. The specific connection methods of each part adopt conventional methods such as bolts, rivets, and welding that are mature in the prior art. The machinery, parts and equipment adopt conventional models in the prior art. In addition, the circuit connection adopts conventional connection methods in the prior art, which will not be described in detail here. The contents not described in detail in this specification belong to the prior art known to those skilled in the art.

[0032] Although embodiments of the present invention have been shown and described, the scope of the present invention will be defined by the appended claims and their equivalents for those skilled in the art.

Claims

1. A self-aligning mold structure for polytetrafluoroethylene gaskets, characterized in that, The system includes a workbench (1), a support frame (2), a lower mold (4), and an upper mold (6). A floating mechanism (5) is provided on the lower side of the support frame (2), and the upper mold (6) is located on the lower side of the floating mechanism (5). The floating mechanism (5) includes a fixed plate (7), a spring (9), and a floating plate (10). The fixed plate (7) is located on the lower side of the support frame (2), and four main guide columns (8) are fixedly installed on the lower side of the fixed plate (7). Four through slots are opened on the upper side of the floating plate (10), and a main guide sleeve (11) is fixedly installed in each of the four through slots. The main guide column (8) is slidably inserted into the main guide sleeve (11). A limit plate (14) is fixedly installed at the lower end of the main guide column (8). The limit plate (14) is located on the lower side of the floating plate (10), and the spring (9) is fixedly installed between the fixed plate (7) and the floating plate (10).

2. The self-aligning mold structure for polytetrafluoroethylene gaskets according to claim 1, characterized in that, Limiting blocks (12) are fixedly installed on the lower side of the fixing plate (7), the number of springs (9) corresponds to the number of main columns (8), and the springs (9) are sleeved around the main columns (8).

3. The self-aligning mold structure for polytetrafluoroethylene gaskets according to claim 2, characterized in that, The support frame (2) is fixedly installed on the upper side of the workbench (1), and a drive cylinder (3) is fixedly installed on the upper side of the support frame (2). The output end of the drive cylinder (3) is fixedly connected to the fixed plate (7).

4. The self-aligning mold structure for polytetrafluoroethylene gaskets according to claim 3, characterized in that, Two guide rods (15) are fixedly installed between the support frame (2) and the workbench (1). Guide slide plates (16) are fixedly installed on both sides of the fixed plate (7). The guide slide plates (16) are slidably connected to the guide rods (15).

5. A self-aligning mold structure for polytetrafluoroethylene gaskets according to claim 1, characterized in that, The upper mold (6) is fixedly installed on the lower side of the floating plate (10). Four lower guide pillars (13) are fixedly installed on the lower side of the floating plate (10). The lower mold (4) is fixedly installed on the upper side of the workbench (1). Four mounting slots (17) are opened on the upper side of the lower mold (4). A lower guide sleeve (18) is fixedly installed in the mounting slot (17). A tapered guide surface (24) is provided on the circumference of the upper inner wall of the lower guide sleeve (18).

6. The self-aligning mold structure for polytetrafluoroethylene gaskets according to claim 5, characterized in that, A discharge mechanism (19) is provided between the lower mold (4) and the worktable (1). The discharge mechanism (19) includes an electric telescopic rod (21), a connecting rod, and a lifting plate (22).

7. A self-aligning mold structure for polytetrafluoroethylene gaskets according to claim 6, characterized in that, The workbench (1) has an installation groove (20) on its upper side, and the lower mold (4) has a storage groove (23) at the bottom of its inner wall. The connecting rod is fixedly connected to the lifting plate (22), and the lifting plate (22) is set in the storage groove (23). The electric telescopic rod (21) is fixedly installed in the installation groove (20), and the output end of the electric telescopic rod (21) is fixedly connected to the connecting rod.

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