Polytetrafluoroethylene isostatic pressing device
By introducing a pressure adjustment mechanism into the polytetrafluoroethylene isostatic forming device, the problem of unstable pressure in the pressurized chamber in the existing device is solved, and efficient and stable polytetrafluoroethylene static forming is achieved.
Patent Information
- Application Number
- CN202411959203.3
- Authority / Receiving Office
- CN · China
- Patent Type
- Applications(China)
- Current Assignee / Owner
- Filing Date
- 2024-12-30
- Publication Date
- 2025-03-11
AI Technical Summary
The existing isostatic molding device lacks pressure adjustment devices when static molding of polytetrafluoroethylene, resulting in unstable pressure in the pressurized chamber and affecting the molding quality.
A polytetrafluoroethylene isostatic forming device including a pressurization chamber, a forming mold and a pressure adjustment mechanism is designed. The pressure regulating mechanism consists of a pressure regulating chamber, a piston, a sliding rod, a cross rod and a reset mechanism, which can adjust and maintain the pressure in the pressurized chamber to prevent air leakage.
Through the setting of the pressure adjustment mechanism, the pressure stability in the pressurized chamber is ensured, the product quality of static pressure forming of polytetrafluoroethylene is improved, and the molding efficiency and product stability are ensured.
Smart Images
Figure CN119589867A_ABST
Abstract
Description
Technical Field
[0001] The invention belongs to the technical field of isostatic pressing, and in particular relates to a polytetrafluoroethylene isostatic pressing device. Background Art
[0002] Isostatic pressing is to place the sample to be pressed in a high-pressure container, and use the incompressible nature of the liquid medium and the property of uniformly transmitting pressure to uniformly pressurize the sample from all directions. When the liquid medium is injected into the pressure vessel through a pressure pump, according to the principles of fluid mechanics, its pressure remains unchanged and is evenly transmitted to all directions. At this time, the pressure on the powder in the high-pressure container in all directions is uniform and consistent. The method of forming a dense body from lean powder by the above method is called isostatic pressing.
[0003] The existing isostatic pressing device does not have a pressure regulating device when isostatically pressing polytetrafluoroethylene. Once the pressurizing device leaks during operation, the quality of isostatic pressing of polytetrafluoroethylene will be affected. In serious cases, the purpose of isostatic pressing of polytetrafluoroethylene cannot be achieved. Summary of the invention
[0004] The purpose of the present invention is to overcome the deficiencies in the prior art and provide a polytetrafluoroethylene isostatic pressing device, which can perform isostatic pressing on polytetrafluoroethylene powder, thereby ensuring the efficiency of polytetrafluoroethylene product molding. The setting of the pressure regulating mechanism can regulate the pressure in the pressurizing chamber to ensure that the pressurizing chamber is pressurized, thereby preventing the pressure in the pressurizing chamber from being insufficient during the isostatic pressing of polytetrafluoroethylene, thereby affecting the quality of the statically pressed product, thereby ensuring the quality of the product after the device performs isostatic pressing on polytetrafluoroethylene.
[0005] In order to achieve the above object, the technical solution adopted by the present invention is:
[0006] A polytetrafluoroethylene isostatic pressing device comprises a pressurizing chamber and a molding die, wherein a sealing member is arranged at the top of the pressurizing chamber, a fixing mechanism and a pressure relief valve are arranged on the sealing member, the pressure relief valve is arranged at one side of the fixing mechanism, a fixing seat is arranged inside the pressurizing chamber, the molding die is arranged at the top of the fixing seat, the fixing mechanism is used to fix the molding die on the fixing seat, a pressure charging pipe is arranged at one side of the bottom of the pressurizing chamber, and a pressure regulating mechanism is arranged on the other side of the pressurizing chamber, the pressure regulating mechanism comprises a pressure regulating chamber, a piston, a sliding rod, a cross bar and a reset mechanism, the pressure regulating chamber is symmetrically arranged on both sides of the center line of the pressurizing chamber, and the pressure regulating chamber is connected with the pressurizing chamber, the piston is slidably arranged in the pressure regulating chamber, and a gasket is arranged between the edge of the piston and the inner wall of the pressure regulating chamber, one end of the sliding rod is fixedly mounted on the piston, and one end of the sliding rod passes through the side wall of the pressure regulating chamber and extends to the outside of the pressure regulating chamber, the cross bar is fixedly mounted on the sliding rod, the reset mechanism is fixedly mounted on the other side wall of the pressurizing chamber, and the reset mechanism is connected to the cross bar.
[0007] Preferably, the reset mechanism includes a mounting block, a third threaded rod, a second spring, a sliding sleeve, a guide block and a guide groove, a through hole is opened in the middle of the cross bar, the guide block is fixedly mounted on the inner wall of the through hole, the guide groove is arranged on the sliding sleeve, the guide block slides in cooperation with the guide groove, the mounting blocks are arranged one above and one below on the side walls of the pressure chamber, both ends of the third threaded rod are rotatably mounted on the mounting blocks arranged one above and one below, the sliding sleeve is threadedly connected to the third threaded rod, and a first hexagonal nut is fixedly mounted on the top of the third threaded rod for easy rotation of the third threaded rod, the reset mechanism is used to drive the cross bar to reset, the cross bar reset can drive the cross bar and the sliding rod reset, the cross bar and the sliding rod reset can drive the piston to move inside the pressure regulating chamber, thereby achieving the purpose of maintaining the pressure in the pressurized chamber, thereby ensuring the product quality of static pressure forming of polytetrafluoroethylene by the device.
[0008] Preferably, the sealing member comprises a sealing plate, a lifting cylinder, a fixed shaft and a support arm, the support arms are symmetrically arranged on both sides of the pressurized chamber, the support arms are fixedly mounted on the side walls of the pressurized chamber through the fixed shaft, a strip hole is opened on the top of the support arm, a sliding block is slidably arranged in the strip hole, a fixed block is fixedly mounted on the top of the sealing plate, a connecting shaft is fixedly mounted on the end of the fixed block, the connecting shaft is rotatably mounted on the sliding block, the lifting cylinder is fixedly mounted on the support arm, and the piston rod of the lifting cylinder is rotatably mounted on the connecting shaft, a limiting hoop is fixedly mounted on the top of the pressurized chamber, the sealing plate cooperates with the limiting hoop, the setting of the sealing plate can seal the pressurized chamber to prevent air leakage during pressurization of the pressurized chamber, and the pressure in the pressurized chamber is ensured, the setting of the support arm facilitates the removal of the sealing plate from the pressurized chamber, the setting of the lifting cylinder facilitates the fixing of the sealing plate on the top of the pressurized chamber, and the function of the lifting cylinder can also remove the sealing plate from the top of the pressurized chamber, thereby greatly ensuring the sealing quality of the pressurized chamber.
[0009] Preferably, a sealing gasket is fixedly installed at the bottom of the sealing plate, and a limiting groove is opened in the middle of the sealing gasket. The limiting groove cooperates with the fixing mechanism. The setting of the sealing gasket facilitates sealing the top of the pressurized chamber to prevent air leakage in the pressurized chamber, thereby ensuring the quality of the pressurized chamber for pressurized molding of polytetrafluoroethylene.
[0010] Preferably, the fixing mechanism includes a first handle, a first threaded rod, a lower pressure plate, a lifting plate and a lifting rod fixedly installed at both ends of the lifting plate, the lifting rod is slidably installed on the sealing plate, and the bottom of the lifting rod is fixedly installed on the lower pressure plate, the bottom of the first threaded rod is rotatably installed on the sealing plate, the lifting plate is threadedly connected to the first threaded rod, the first handle is fixedly installed on the top of the first threaded rod, and the fixing mechanism is used to fix the forming mold on the fixed seat in the pressurized chamber to ensure the safety and stability of the forming mold during the working process, rotating the first handle drives the first threaded rod to rotate, and the rotation of the first threaded rod drives the lifting plate to move downward, the downward movement of the lifting plate drives the lifting rod to move downward, the downward movement of the lifting rod drives the lower pressure plate to move downward, and the downward movement of the lower pressure plate fixes the forming mold on the fixed seat inside the pressurized chamber.
[0011] Preferably, it also includes a limiting mechanism, which includes a limiting plate, a limiting block, a guide rod and a first spring, wherein the limiting plate is fixedly mounted on the side wall of the pressure chamber, and the limiting plate is concentric with the fixed axis, a waist-shaped hole is opened on the other end of the support arm, and the two ends of the guide rod are respectively fixedly mounted on the two side walls of the waist-shaped hole, the limiting block is slidably arranged in the waist-shaped hole, and the limiting block is slidably arranged on the guide rod, the first spring is sleeved on the guide rod, and the first spring is located between the limiting block and the side wall of the waist-shaped hole, and a number of limiting grooves are evenly opened at the edge of the limiting plate, and the limiting grooves cooperate with the limiting block. The setting of the limiting mechanism can achieve the purpose of limiting the support arm, thereby ensuring the normal operation of the support arm and greatly improving the safety and stability of the support arm during operation.
[0012] Preferably, a pulling mechanism is also fixedly installed on the support arm, and the pulling mechanism includes a side plate, a second threaded rod, a second handle, a movable plate, a pulling rod fixedly installed at both ends of the movable plate and a pulling plate, the side plate is fixedly installed on the support arm, and the side plate is located on one side of the waist-shaped hole, the second threaded rod is rotatably installed on the side plate, the movable plate threaded rod is installed on the second threaded rod, grooves are opened on both sides of the side plate, the pulling rod and the groove are slidably matched, a positioning groove is opened on the limit block, and the pulling plate cooperates with the positioning groove, and the pulling mechanism is used to pull the limit block to prevent the limit block from cooperating with the limit groove on the limit plate when the support arm is rotated, affecting the normal rotation of the support arm, rotating the second handle drives the second threaded rod to rotate, the rotation of the second threaded rod drives the movable plate to move, the movement of the movable plate drives the pulling rod to pull the pulling plate to move, the movement of the pulling plate drives the limit block to move along the guide rod, and the limit block moves along the guide rod while compressing the first spring.
[0013] Preferably, the molding die comprises an upper sealing plate, a lower sealing plate, an outer sleeve, a positioning column and a first rubber sleeve, the positioning column is fixedly installed at the bottom of the upper sealing plate, a mounting groove is opened in the middle of the positioning column, and connecting flanges are fixedly installed on the upper and lower ends of the outer sleeve, the upper and lower sealing plates are fixedly installed on the connecting flanges at the upper and lower ends of the outer sleeve by bolts and nuts, the first rubber sleeve is arranged between the positioning column and the outer sleeve, and a compacting piece is also arranged in the mounting groove, and the arrangement of the outer sleeve facilitates the restricted positioning of the first rubber sleeve, and the polytetrafluoroethylene powder is input into the gap between the first rubber sleeve and the positioning column, so as to achieve the purpose of fixing the polytetrafluoroethylene powder, and facilitate the device to pressurize and mold the polytetrafluoroethylene powder.
[0014] Preferably, a first fixing groove is formed on the upper sealing plate and the lower sealing plate, and a second fixing groove is formed on the connecting flanges at the upper and lower ends of the outer sleeve. The first fixing groove and the second fixing groove are both used to position the first rubber sleeve. A second rubber sleeve is also provided on the lower sealing plate, and the second rubber sleeve is arranged in the first fixing groove on the connecting flange below the outer sleeve. A plurality of through holes are evenly formed on the lower sealing plate and the outer sleeve. The provision of the second rubber sleeve can seal the bottom of the first sliding sleeve, ensuring that the gap between the first rubber sleeve and the positioning column is in a sealed state, greatly ensuring the molding quality of polytetrafluoroethylene by the device, and the plurality of through holes at the bottom of the lower sealing plate cooperate with the second rubber sleeve to seal the bottom of the first rubber sleeve, thereby generating a cylindrical molded product with a closed bottom.
[0015] Preferably, the compacting member includes a fourth threaded rod, a compacting ring, a vertical rod, a connecting rod and a connecting plate, the fourth threaded rod being rotatably mounted on the mounting groove, the compacting ring being arranged between the first rubber sleeve and the positioning column, the vertical rod being fixedly mounted on the top of the compacting ring, a bend being arranged on the top of the vertical rod, the connecting rod being arranged in the mounting groove, and the connecting rod being fixedly mounted below the bend, the connecting plate being fixedly mounted on the bottom of the connecting rod, the connecting plate being threadedly connected to the fourth threaded rod, a second hexagonal nut being arranged on the top of the fourth threaded rod, the compacting member being arranged for fixed compaction of the polytetrafluoroethylene powder between the first rubber sleeve and the positioning column gap, greatly improving the quality of polytetrafluoroethylene pressurized molding, the fourth threaded rod being driven to rotate by a wrench or an electric wrench, the fourth threaded rod being driven to rotate and the connecting plate being driven to move downward, the connecting plate being driven downward and the connecting rod, the bend and the vertical rod being driven downward, the vertical rod being driven downward and the compacting ring being driven downward, the compacting ring being moved downward to compact the polytetrafluoroethylene in the gap between the first rubber sleeve and the positioning column.
[0016] The beneficial effects of the present invention are:
[0017] 1) The device can perform static pressure molding on polytetrafluoroethylene powder, ensuring the efficiency of polytetrafluoroethylene product molding. The setting of the pressure regulating mechanism can adjust the pressure in the pressurizing chamber to ensure that the pressurizing chamber is pressurized, thereby preventing the pressure in the pressurizing chamber from being insufficient during static pressure molding of polytetrafluoroethylene, thereby affecting the quality of the static pressure molded product, thereby ensuring the quality of the product after the device performs static pressure molding of polytetrafluoroethylene.
[0018] 2) The reset mechanism of the device is used to drive the cross bar to reset, and the cross bar reset can drive the cross bar and the sliding rod to reset, and the cross bar and the sliding rod reset can drive the piston to move inside the pressure regulating chamber, thereby achieving the purpose of maintaining the pressure in the pressurized chamber, ensuring the product quality of the static pressure molding of polytetrafluoroethylene by the device.
[0019] 3) The setting of the sealing plate of the device can seal the pressurized chamber to prevent air leakage during the pressurization of the pressurized chamber, thereby ensuring the pressure in the pressurized chamber. The setting of the support arm facilitates the removal of the sealing plate from the pressurized chamber. The setting of the lifting cylinder facilitates the fixing of the sealing plate to the top of the pressurized chamber. At the same time, the lifting cylinder can also remove the sealing plate from the top of the pressurized chamber, thereby greatly ensuring the sealing quality of the pressurized chamber.
[0020] 4) The sealing gasket of the device is provided to facilitate sealing the top of the pressurized chamber, thereby preventing air leakage in the pressurized chamber and ensuring the quality of the pressurized chamber for the pressurized molding of polytetrafluoroethylene.
[0021] 5) The fixing mechanism of the device is used to fix the molding die on the fixed seat in the pressurized chamber, which ensures the safety and stability of the molding die during the working process. The first handle is rotated to drive the first threaded rod to rotate, and the rotation of the first threaded rod drives the lifting plate to move downward. The downward movement of the lifting plate drives the lifting rod to move downward, and the downward movement of the lifting rod drives the lower pressure plate to move downward. The downward movement of the lower pressure plate fixes the molding die on the fixed seat inside the pressurized chamber.
[0022] 6) The setting of the limiting mechanism of the device can limit the support arm, ensure the normal operation of the support arm, and greatly improve the safety and stability of the support arm during operation.
[0023] 7) The pulling mechanism of the device is used to pull the limit block to prevent the limit block from cooperating with the limit groove on the limit plate to affect the normal rotation of the support arm when the support arm is rotated. Rotating the second handle drives the second threaded rod to rotate, and the rotation of the second threaded rod drives the moving plate to move. The movement of the moving plate drives the pulling rod to pull the pulling plate to move. The movement of the pulling plate drives the limit block to move along the guide rod. The limit block moves along the guide rod while compressing the first spring.
[0024] 8) The setting of the outer sleeve of the device is convenient for limiting the positioning of the first rubber sleeve, inputting the polytetrafluoroethylene powder into the gap between the first rubber sleeve and the positioning column, achieving the purpose of fixing the polytetrafluoroethylene powder, and facilitating the pressure molding of the polytetrafluoroethylene powder by the device.
[0025] 9) The second rubber sleeve of the device can seal the bottom of the first sliding sleeve, ensuring that the gap between the first rubber sleeve and the positioning column is in a sealed state, greatly ensuring the molding quality of polytetrafluoroethylene by the device, and the plurality of through holes at the bottom of the lower sealing plate cooperate with the second rubber sleeve to seal the bottom of the first rubber sleeve, thereby generating a cylindrical molded product with a closed bottom.
[0026] 10) The compacting part of the device is used to fix and compact the polytetrafluoroethylene powder between the first rubber sleeve and the positioning column gap, which greatly improves the quality of polytetrafluoroethylene pressurized molding. The fourth threaded rod is driven to rotate by a wrench or an electric wrench. The rotation of the fourth threaded rod drives the connecting plate to move downward. The downward movement of the connecting plate drives the connecting rod, the bend and the vertical rod to move downward. The downward movement of the vertical rod will drive the compacting ring to move downward. The downward movement of the compacting ring will compact the polytetrafluoroethylene in the gap between the first rubber sleeve and the positioning column. BRIEF DESCRIPTION OF THE DRAWINGS
[0027] Attached Figure 1 The structure of the present invention is schematically shown in FIG. Figure 1 .
[0028] Attached Figure 2 The structure of the present invention is schematically shown in FIG. Figure 2 .
[0029] Attached Figure 3 It is a schematic diagram of the installation structure of the forming mold in the present invention.
[0030] Attached Figure 4 It is a structural schematic diagram of the pressurized chamber in the present invention.
[0031] Attached Figure 5 The structure of the sealing member in the present invention is shown in FIG. Figure 1 .
[0032] Attached Figure 6 The structure of the sealing member in the present invention is shown in FIG. Figure 2 .
[0033] Attached Figure 7 The present invention Figure 6 Enlarged view of point B in the middle.
[0034] Attached Figure 8 It is a structural schematic diagram of the limiting mechanism in the present invention.
[0035] Attached Fig. 9 The present invention Figure 6 Enlarged view of point A in the middle.
[0036] Attached Fig.10 It is a schematic diagram of the installation structure of the side panel in the present invention.
[0037] Attached Fig.11 It is a structural schematic diagram of the pressure regulating mechanism in the present invention.
[0038] Attached Fig.12 It is a schematic diagram of the installation structure of the through hole on the crossbar and the guide block in the present invention.
[0039] Attached Fig.13 It is a schematic diagram of the installation structure of the piston and the sliding rod in the present invention.
[0040] Attached Fig.14 It is a structural schematic diagram of the reset mechanism in the present invention.
[0041] Attached Fig.15 It is a cross-sectional view of the molding die in the present invention.
[0042] Attached Fig.16 It is a structural schematic diagram of the outer sleeve in the present invention.
[0043] Attached Fig.17 It is a structural schematic diagram of the compacting member in the present invention.
[0044] Attached Fig.18 It is a structural schematic diagram of the first fixing groove in the present invention.
[0045] Attached Fig.19 It is a structural schematic diagram of the fixing seat in the present invention.
[0046] In the figure:
[0047] 1. Pressurized chamber; 101. Limiting hoop;
[0048] 2. Fixed seat; 201. Placement plate; 202. Placement slot; 203. Hole;
[0049] 3. Fixing mechanism; 301. First handle; 302. First threaded rod; 303. Lifting plate; 304. Lifting rod; 305. Lower pressing plate;
[0050] 4. Pressure relief valve;
[0051] 5. Sealing element; 501. Fixed shaft; 502. Support arm; 503. Lifting cylinder; 504. Sliding block; 505. Strip hole; 506. Sealing plate; 507. Sealing pad; 508. Fixed block; 509. Connecting shaft; 5010. Waist-shaped hole;
[0052] 6. Limiting mechanism; 601. Limiting plate; 602. Limiting slot; 603. First spring; 604. Guide rod; 605. Limiting block; 606. Positioning slot;
[0053] 7. Pulling mechanism; 701. Second handle; 702. Second threaded rod; 703. Moving plate; 704. Pulling rod; 705. Pulling plate; 706. Side plate; 707. Groove;
[0054] 8. Pressure regulating mechanism; 801. Pressure regulating chamber; 802. Cross bar; 803. Through hole; 804. Guide block; 805. Piston; 806. Sliding rod;
[0055] 807, reset mechanism; 808, second spring; 809, sliding sleeve; 8010, third threaded rod; 8011, first hexagon socket nut; 8012, mounting block; 8013, guide groove;
[0056] 9. Forming mold; 901. Upper blocking plate; 902. Outer sleeve; 903. First rubber sleeve; 904. Lower blocking plate; 905. Second rubber sleeve; 906. Positioning column; 907. Compacting piece; 908. Connecting flange; 909. Second fixing groove; 9010. Through hole; 9011. Mounting groove;
[0057] 9012, fourth threaded rod; 9013, compacting ring; 9014, connecting plate; 9015, vertical rod; 9016, bending; 9017, connecting rod; 9018, second hexagon socket nut;
[0058] 9019, first fixing groove;
[0059] 10. Pressurized tube. DETAILED DESCRIPTION
[0060] The following is a clear and complete description of the technical solutions in the embodiments of the present invention in conjunction with the accompanying drawings. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.
[0061] In the description of the present invention, it should be understood that the terms "longitudinal", "lateral", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside" and "outside" etc., indicating orientations or positional relationships, are based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be understood as a limitation on the present invention.
[0062] like Figure 1 , Figure 2 , Figure 3 , Figure 4As shown, a polytetrafluoroethylene isostatic pressing device includes a pressurizing chamber 1 and a molding die 9. A sealing member 5 is provided on the top of the pressurizing chamber 1. The sealing member 5 is provided to ensure the pressure in the pressurizing chamber 1 and the quality of the polytetrafluoroethylene pressurized molding product. A fixing mechanism 3 and a pressure relief valve 4 are provided on the sealing member 5. The pressure relief valve 4 is provided on one side of the fixing mechanism 3. The pressure relief valve 4 is provided to relieve the pressure of the pressurizing chamber 1 to facilitate the removal of the molding die 9 in the pressurizing chamber 1. A fixing seat 2 is provided inside the pressurizing chamber 1. The fixing seat 2 2 is used to support the forming mold 9 to ensure that the forming mold 9 is always in a stable state during the working process. The forming mold 9 is arranged on the top of the fixing seat 2. The fixing mechanism 3 is used to fix the forming mold 9 on the fixing seat 2. A charging pipe 10 is arranged on one side of the bottom of the pressurizing chamber 1. The charging pipe 10 is used to pressurize the pressurizing chamber 1. A pressure regulating mechanism 8 is arranged on the other side of the pressurizing chamber 1. The pressure regulating mechanism 8 can ensure that the pressure in the pressure chamber is always in a stable state, thereby ensuring the quality of static pressure molding of polytetrafluoroethylene products.
[0063] As an optimization solution of the present invention, Fig.11 , Fig.12 , Fig.13 , Fig.14 As shown, the pressure regulating mechanism 8 includes a pressure regulating chamber 801, a piston 805, a sliding rod 806, a cross bar 802 and a reset mechanism 807. The pressure regulating chamber 801 is symmetrically arranged on both sides of the center line of the pressurizing chamber 1, and the pressure regulating chamber 801 is communicated with the pressurizing chamber 1. The piston 805 is slidably arranged in the pressure regulating chamber 801, and a gasket is arranged between the edge of the piston 805 and the inner wall of the pressure regulating chamber 801. One end of the sliding rod 806 is fixedly installed on the piston 805, and one end of the sliding rod 806 passes through the side wall of the pressure regulating chamber 801 and extends to the outside of the pressure regulating chamber 801. The cross bar 802 is fixedly installed on the sliding rod 806. The reset mechanism 807 is fixedly installed on the other side wall of the pressurizing chamber 1, and the reset mechanism 807 is connected to the cross bar 802. The pressure regulating mechanism 8 can ensure that the pressure in the pressurizing chamber 1 is always in a stable state, ensure that the pressure in the pressure chamber is always in a stable state during the static pressure molding process of polytetrafluoroethylene, and greatly ensure the quality of the static pressure molded polytetrafluoroethylene products.
[0064] As an optimization solution of the present invention, Fig.14As shown, the reset mechanism 807 includes a mounting block 8012, a third threaded rod 8010, a second spring 808, a sliding sleeve 809, a guide block 804 and a guide groove 8013. A through hole 803 is opened in the middle of the cross bar 802, and the guide block 804 is fixedly mounted on the inner wall of the through hole 803. The guide groove 8013 is arranged on the sliding sleeve 809, and the guide block 804 and the guide groove 8013 are slidably matched. The arrangement of the guide block 804 and the guide groove 8013 can prevent the sliding sleeve 809 from rotating with the third threaded rod 8010, and ensure that the sliding sleeve 809 rotates when the third threaded rod 8010 rotates. The sleeve 809 can move along the threaded rod, and the mounting blocks 8012 are arranged one up and one down on the side wall of the pressure chamber. Both ends of the third threaded rod 8010 are rotatably mounted on the mounting blocks 8012 arranged one up and one down. The sliding sleeve 809 is threadedly connected to the third threaded rod 8010, and a first hexagon socket nut 8011 is fixedly installed on the top of the third threaded rod 8010 to facilitate the rotation of the third threaded rod 8010. The setting of the first hexagon socket nut 8011 makes it easy for the staff to drive the third threaded rod 8010 to rotate by using a wrench or an electric wrench, thereby ensuring the purpose of adjusting the reset mechanism 807.
[0065] The pressure chamber 1 is pressurized through the pressure charging pipe 10. During the pressurizing process, the piston 805 is driven to move downward toward the pressure regulating chamber 801. The movement of the piston 805 drives the sliding rod 806 to move. The movement of the sliding rod 806 drives the cross bar 802 to move downward. The downward movement of the cross bar 802 compresses the second spring 808. After the pressurization is completed, the second spring 808 is in a compressed state. After entering the pressure holding state, the second spring 808 will always provide elastic force for the piston 805. Once the pressure in the pressurizing chamber 1 leaks, the second spring 808 will push the piston 805 to move upward, thereby achieving the purpose of pressurizing the pressurizing chamber 1, ensuring that the pressure in the pressurizing chamber 1 is always in a stable state, and ensuring the quality of the static pressing of polytetrafluoroethylene powder by the device.
[0066] The reset mechanism 807 is used to drive the cross bar 802 to reset. The reset of the cross bar 802 can drive the cross bar 802 and the sliding rod 806 to reset. The reset of the cross bar 802 and the sliding rod 806 can drive the piston 805 to move inside the pressure regulating chamber 801, thereby achieving the purpose of maintaining the pressure in the pressurizing chamber 1, ensuring the product quality of the static pressure molding of polytetrafluoroethylene by the device.
[0067] As an optimization solution of the present invention, Figure 5 , Figure 6As shown, the sealing member 5 includes a sealing plate 506, a lifting cylinder 503, a fixed shaft 501 and a support arm 502. The support arm 502 is symmetrically arranged on both sides of the pressurized chamber 1. The support arm 502 is fixedly installed on the side wall of the pressurized chamber 1 through the fixed shaft 501. A strip hole 505 is opened on the top of the support arm 502, and a sliding block 504 is slidably arranged in the strip hole 505. A fixed block 508 is fixedly installed on the top of the sealing plate 506, and a connecting shaft 509 is fixedly installed at the end of the fixed block 508. The connecting shaft 509 is rotatably installed on the sliding block 504. The lifting cylinder 503 is fixedly installed on the support arm 502, and the piston 805 rod of the lifting cylinder 503 is rotatably installed on the connecting shaft 509. A limiting hoop 101 is fixedly installed on the top of the pressurized chamber 1, and the sealing plate 506 cooperates with the limiting hoop 101.
[0068] The setting of the sealing plate 506 can seal the pressurized chamber 1 to prevent air leakage during the pressurization of the pressurized chamber 1, thereby ensuring the pressure in the pressurized chamber 1. The setting of the support arm 502 facilitates the removal of the sealing plate 506 from the pressurized chamber 1. The setting of the lifting cylinder 503 facilitates the fixing of the sealing plate 506 to the top of the pressurized chamber 1. At the same time, the lifting cylinder 503 can also remove the sealing plate 506 from the top of the pressurized chamber 1, thereby greatly ensuring the sealing quality of the pressurized chamber 1.
[0069] As an optimization solution of the present invention, Figure 5 As shown, a sealing gasket 507 is fixedly installed at the bottom of the sealing plate 506 , and a limiting groove 602 is opened in the middle of the sealing gasket 507 , and the limiting groove 602 cooperates with the fixing mechanism 3 .
[0070] The provision of the sealing gasket 507 facilitates sealing of the top of the pressurized chamber 1 to prevent air leakage in the pressurized chamber 1 , thereby ensuring the quality of the pressurized chamber 1 for pressurizing polytetrafluoroethylene.
[0071] As an optimization solution of the present invention, Figure 7 , Figure 8 As shown, the fixing mechanism 3 includes a first handle 301, a first threaded rod 302, a lower pressure plate 305, a lifting plate 303 and lifting rods 304 fixedly installed at both ends of the lifting plate 303, the lifting rods 304 are slidably installed on the sealing plate 506, and the bottom of the lifting rod 304 is fixedly installed on the lower pressure plate 305, the bottom of the first threaded rod 302 is rotatably installed on the sealing plate 506, and the lifting plate 303 is threadedly connected to the first threaded rod 302.
[0072] The first handle 301 is fixedly installed on the top of the first threaded rod 302. The fixing mechanism 3 is configured to fix the forming mold 9 on the fixing seat 2 in the pressurized chamber 1, thereby ensuring the safety and stability of the forming mold 9 during the working process. Rotating the first handle 301 drives the first threaded rod 302 to rotate. The rotation of the first threaded rod 302 drives the lifting plate 303 to move downward. The downward movement of the lifting plate 303 drives the lifting rod 304 to move downward. The downward movement of the lifting rod 304 drives the lower pressure plate 305 to move downward. The downward movement of the lower pressure plate 305 fixes the forming mold 9 on the fixing seat 2 inside the pressurized chamber 1.
[0073] As an optimization solution of the present invention, Figure 8 As shown, it also includes a limiting mechanism 6, which includes a limiting plate 601, a limiting block 605, a guide rod 604 and a first spring 603. The limiting plate 601 is fixedly installed on the side wall of the pressure chamber, and the limiting plate 601 is concentric with the fixed axis 501. A waist-shaped hole 5010 is opened on the other end of the support arm 502. The two ends of the guide rod 604 are respectively fixedly installed on the two side walls of the waist-shaped hole 5010. The limiting block 605 is slidably set in the waist-shaped hole 5010, and the limiting block 605 is slidably installed on the guide rod 604. The first spring 603 is sleeved on the guide rod 604, and the first spring 603 is located between the limiting block 605 and the side wall of the waist-shaped hole 5010. A plurality of limiting grooves 602 are evenly opened at the edge of the limiting plate 601.
[0074] The limiting groove 602 cooperates with the limiting block 605, and the setting of the limiting mechanism 6 can limit the support arm 502, ensure the normal operation of the support arm 502, and greatly improve the safety and stability of the support arm 502 during operation.
[0075] As an optimization solution of the present invention, Fig. 9 , Fig.10 As shown, a pulling mechanism 7 is also fixedly installed on the support arm 502, and the pulling mechanism 7 includes a side plate 706, a second threaded rod 702, a second handle 701, a movable plate 703, a pulling rod 704 fixedly installed at both ends of the movable plate 703, and a pulling plate 705. The side plate 706 is fixedly installed on the support arm 502, and the side plate 706 is located on one side of the waist-shaped hole 5010. The second threaded rod 702 is rotatably installed on the side plate 706, and the movable plate 703 threaded rod is installed on the second threaded rod 702. Grooves 707 are provided on both sides of the side plate 706, and the pulling rod 704 is slidably matched with the groove 707. A positioning groove 606 is provided on the limit block 605, and the pulling plate 705 cooperates with the positioning groove 606. The setting of the positioning groove 606 can limit the movement of the positioning plate on the limit block 605, thereby ensuring that the pulling plate 705 is always matched with the limit block 605.
[0076] The pulling mechanism 7 is used to pull the limit block 605 to prevent the limit block 605 from cooperating with the limit groove 602 on the limit plate 601 to affect the normal rotation of the support arm 502 when the support arm 502 is rotated. The second handle 701 is rotated to drive the second threaded rod 702 to rotate. The rotation of the second threaded rod 702 drives the moving plate 703 to move. The movement of the moving plate 703 drives the pulling rod 704 to pull the pulling plate 705 to move. The movement of the pulling plate 705 drives the limit block 605 to move along the guide rod 604. The limit block 605 moves along the guide rod 604 while compressing the first spring 603.
[0077] As an optimization solution of the present invention, Fig.15 As shown, the molding die 9 includes an upper blocking plate 901, a lower blocking plate 904, an outer sleeve 902, a positioning column 906 and a first rubber sleeve 903. The positioning column 906 is fixedly installed at the bottom of the upper blocking plate 901. A mounting groove 9011 is opened in the middle of the positioning column 906. The arrangement of the mounting groove 9011 facilitates the installation of the compacting member 907 and ensures the normal operation of the compacting member 907. Connecting flanges 908 are fixedly installed on the upper and lower ends of the outer sleeve 902. The upper blocking plate 901 and the lower blocking plate 904 are fixedly installed on the connecting flanges 908 at the upper and lower ends of the outer sleeve 902 by bolts and nuts. The arrangement of flange 908 facilitates the installation of upper sealing plate 901 and lower sealing plate 904, thereby achieving the purpose of sealing the first rubber sleeve 903 and the second rubber sleeve 905, preventing polytetrafluoroethylene powder from directly contacting the liquid, and ensuring the efficiency and quality of the static pressing of polytetrafluoroethylene. The first rubber sleeve 903 is arranged between the positioning column 906 and the outer sleeve 902, and a compacting piece 907 is also arranged in the installation groove 9011. The arrangement of the compacting piece 907 can discharge the air between the polytetrafluoroethylene powder, so that the gap between the polytetrafluoroethylene powder is greatly reduced, thereby improving the efficiency and quality of the static pressing of polytetrafluoroethylene.
[0078] The setting of the outer sleeve 902 facilitates the restricted positioning of the first rubber sleeve 903, and the polytetrafluoroethylene powder is input into the gap between the first rubber sleeve 903 and the positioning column 906, so as to achieve the purpose of fixing the polytetrafluoroethylene powder and facilitate the device to pressurize and mold the polytetrafluoroethylene powder.
[0079] As an optimization solution of the present invention, Fig.16 , 18As shown, a first fixing groove 9019 is formed on the upper blocking plate 901 and the lower blocking plate 904, and a second fixing groove 909 is formed on the connecting flanges 908 at the upper and lower ends of the outer sleeve 902. The first fixing groove 9019 and the second fixing groove 909 are both used to position the first rubber sleeve 903. A second rubber sleeve 905 is also provided on the lower blocking plate 904. The second rubber sleeve 905 is arranged in the first fixing groove 9019 on the connecting flange 908 below the outer sleeve 902. A plurality of through holes 9010 are evenly formed on the lower blocking plate 904 and the outer sleeve 902. The arrangement of the through holes 9010 facilitates the entry of liquid into the interior of the outer sleeve 902 to pressurize the first rubber sleeve 903 and the second rubber sleeve 905, thereby achieving the purpose of static pressure molding of polytetrafluoroethylene powder.
[0080] The second rubber sleeve 905 is provided to seal the bottom of the first sliding sleeve 809, ensuring that the gap between the first rubber sleeve 903 and the positioning column 906 is in a sealed state, greatly ensuring the molding quality of polytetrafluoroethylene by the device, and the plurality of through holes 9010 at the bottom of the lower sealing plate 904 cooperate with the second rubber sleeve 905 to seal the bottom of the first rubber sleeve 903, thereby generating a cylindrical molded product with a closed bottom.
[0081] As an optimization solution of the present invention, Fig.17 As shown, the compacting member 907 includes a fourth threaded rod 9012, a compacting ring 9013, a vertical rod 9015, a connecting rod 9017 and a connecting plate 9014. The fourth threaded rod 9012 is rotatably mounted on the mounting groove 9011. The compacting ring 9013 is arranged between the first rubber sleeve 903 and the positioning column 906. The vertical rod 9015 is fixedly mounted on the top of the compacting ring 9013. A bend 9016 is arranged on the top of the vertical rod 9015. The connecting rod 9017 is arranged in the mounting groove 9011, and the connecting rod 9017 is fixedly mounted below the bend 9016. The connecting plate 9014 is fixedly mounted on the bottom of the connecting rod 9017. The connecting plate 9014 is threadedly connected to the fourth threaded rod 9012. A second hexagon socket nut 9018 is arranged on the top of the fourth threaded rod 9012. The arrangement of the second hexagon socket nut 9018 facilitates the staff to rotate the fourth threaded rod 9012 by a wrench or an electric wrench.
[0082] The compacting member 907 is provided for fixing and compacting the polytetrafluoroethylene powder between the first rubber sleeve 903 and the positioning column 906, which greatly improves the quality of the polytetrafluoroethylene pressurized molding. The fourth threaded rod 9012 is driven to rotate by a wrench or an electric wrench. The rotation of the fourth threaded rod 9012 drives the connecting plate 9014 to move downward. The connecting plate 9014 moves downward and drives the connecting rod 9017, the bend 9016 and the vertical rod 9015 to move downward. The vertical rod 9015 moves downward and drives the compacting ring 9013 to move downward. The compacting ring 9013 moves downward to compact the polytetrafluoroethylene in the gap between the first rubber sleeve 903 and the positioning column 906.
[0083] When adding polytetrafluoroethylene powder to the molding die 9, place the first rubber sleeve 903 inside the outer sleeve 902, and place the top of the first rubber sleeve 903 in the first fixing groove 9019 at the bottom of the upper sealing plate 901 and the second fixing groove 909 on the connecting flange 908 installed on the top of the outer sleeve 902, place the upper sealing plate 901 on the top of the outer sleeve 902, fix the upper sealing plate 901 to the top of the outer sleeve 902 by bolts and nuts, turn the outer sleeve 902 over, place the other end of the first rubber sleeve 903 in the second fixing groove 909 of the connecting flange 908 at the bottom of the outer sleeve 902, and then add polytetrafluoroethylene powder into the gap between the first rubber sleeve 903 and the positioning column 906, After the addition of polytetrafluoroethylene is completed, put the second rubber sleeve 905 of the lower sealing plate 904 into the second fixing groove 909 on the connecting flange 908, and then fix the lower sealing plate 904 in the outer sleeve 902 by bolts and nuts. After the outer sleeve 902 is turned over, the fourth threaded rod 9012 is driven to rotate by a wrench or an electric wrench. The rotation of the fourth threaded rod 9012 drives the connecting plate 9014 to move downward. The connecting plate 9014 moves downward and drives the connecting rod 9017, the bend 9016 and the vertical rod 9015 to move downward. The vertical rod 9015 moves downward and drives the compacting ring 9013 to move downward. The compacting ring 9013 moves downward and compacts the polytetrafluoroethylene in the gap between the first rubber sleeve 903 and the positioning column 906.
[0084] As an optimization solution of the present invention, Fig.19 As shown, the fixing seat 2 includes a placing plate 201, a placing groove 202 opened at the top of the placing plate 201, and a hole 203 opened at the bottom of the placing plate 201, the hole 203 is connected to the placing groove 202, and the lower blocking plate 904 is arranged in the placing groove 202.
[0085] The placement groove 202 can serve the purpose of positioning the lower blocking plate 904 and also serve the purpose of limiting the lower blocking plate 904, thereby ensuring the stability and safety of the molding die 9 during operation.
[0086] The above contents are merely examples and explanations of the structure of the present invention. Those skilled in the art may make various modifications or additions to the specific embodiments described or replace them in a similar manner. As long as they do not deviate from the scope defined by the structure of the present invention, they shall all fall within the protection scope of the present invention.
Claims
1. A polytetrafluoroethylene isostatic pressing device, comprising a pressurizing chamber and a molding die, characterized in that: The cam is provided with a sealing member on the top of the pressurizing chamber, and a fixing mechanism and a pressure relief valve are provided on the sealing member, and the pressure relief valve is provided on one side of the fixing mechanism, and a fixing seat is provided inside the pressurizing chamber, and the forming mold is provided on the top of the fixing seat, and the fixing mechanism is used to fix the forming mold on the fixing seat, and a pressure charging pipe is provided on one side of the bottom of the pressurizing chamber, and a pressure regulating mechanism is provided on the other side of the pressurizing chamber, and the pressure regulating mechanism includes a pressure regulating chamber, a piston, a sliding rod, a cross bar and a reset mechanism, and the pressure regulating chamber is symmetrically arranged on both sides of the center line of the pressurizing chamber, and the pressure regulating chamber is connected with the pressurizing chamber, the piston is slidably arranged in the pressure regulating chamber, and a gasket is arranged between the edge of the piston and the inner wall of the pressure regulating chamber, one end of the sliding rod is fixedly installed on the piston, and one end of the sliding rod passes through the side wall of the pressure regulating chamber and extends to the outside of the pressure regulating chamber, the cross bar is fixedly installed on the sliding rod, and the reset mechanism is fixedly installed on the other side wall of the pressurizing chamber, and the reset mechanism is connected to the cross bar.
2. The polytetrafluoroethylene isostatic pressing device according to claim 1, characterized in that: The reset mechanism includes a mounting block, a third threaded rod, a second spring, a sliding sleeve, a guide block and a guide groove. A through hole is opened in the middle of the cross bar, and the guide block is fixedly mounted on the inner wall of the through hole. The guide groove is arranged on the sliding sleeve, and the guide block slides in cooperation with the guide groove. The mounting blocks are arranged one above and one below on the side walls of the pressure chamber, and both ends of the third threaded rod are rotatably mounted on the mounting blocks arranged one above and one below. The sliding sleeve is threadedly connected to the third threaded rod, and a first hexagonal nut is fixedly mounted on the top of the third threaded rod to facilitate the rotation of the third threaded rod.
3. The polytetrafluoroethylene isostatic pressing device according to claim 1, characterized in that: The sealing component includes a sealing plate, a lifting cylinder, a fixed shaft and a support arm. The support arms are symmetrically arranged on both sides of the pressurized chamber, and the support arms are fixedly installed on the side walls of the pressurized chamber through the fixed shaft. A strip hole is opened on the top of the support arm, and a sliding block is slidably arranged in the strip hole. A fixed block is fixedly installed on the top of the sealing plate, and a connecting shaft is fixedly installed on the end of the fixed block. The connecting shaft is rotatably installed on the sliding block. The lifting cylinder is fixedly installed on the support arm, and the piston rod of the lifting cylinder is rotatably installed on the connecting shaft. A limiting hoop is fixedly installed on the top of the pressurized chamber, and the sealing plate cooperates with the limiting hoop.
4. The polytetrafluoroethylene isostatic pressing device according to claim 3, characterized in that: A sealing pad is fixedly installed at the bottom of the sealing plate, and a limiting groove is opened in the middle of the sealing pad, and the limiting groove is matched with the fixing mechanism.
5. The polytetrafluoroethylene isostatic pressing device according to claim 3, characterized in that: The fixing mechanism includes a first handle, a first threaded rod, a lower pressure plate, a lifting plate, and lifting rods fixedly installed at both ends of the lifting plate, the lifting rods are slidably installed on the sealing plate, and the bottom of the lifting rods is fixedly installed on the lower pressure plate, the bottom of the first threaded rod is rotatably installed on the sealing plate, the lifting plate is threadedly connected to the first threaded rod, and the first handle is fixedly installed on the top of the first threaded rod.
6. The polytetrafluoroethylene isostatic pressing device according to claim 3, characterized in that: It also includes a limiting mechanism, which includes a limiting plate, a limiting block, a guide rod and a first spring. The limiting plate is fixedly mounted on the side wall of the pressure chamber, and the limiting plate is concentric with the fixed axis. A waist-shaped hole is opened on the other end of the support arm, and the two ends of the guide rod are respectively fixedly mounted on the two side walls of the waist-shaped hole. The limiting block is slidably arranged in the waist-shaped hole, and the limiting block is slidably arranged on the guide rod. The first spring is sleeved on the guide rod, and the first spring is located between the limiting block and the side wall of the waist-shaped hole. A number of limiting grooves are evenly opened at the edge of the limiting plate, and the limiting grooves cooperate with the limiting block.
7. The polytetrafluoroethylene isostatic pressing device according to claim 6, characterized in that: A pulling mechanism is also fixedly installed on the support arm, and the pulling mechanism includes a side plate, a second threaded rod, a second handle, a movable plate, a pulling rod fixedly installed at both ends of the movable plate, and a pulling plate. The side plate is fixedly installed on the support arm, and the side plate is located on one side of the waist-shaped hole. The second threaded rod is rotatably installed on the side plate, and the movable plate threaded rod is installed on the second threaded rod. Grooves are opened on both sides of the side plate, and the pulling rod is slidably matched with the groove. A positioning groove is opened on the limit block, and the pulling plate is matched with the positioning groove.
8. The polytetrafluoroethylene isostatic pressing device according to claim 1, characterized in that: The molding mold includes an upper sealing plate, a lower sealing plate, an outer sleeve, a positioning column and a first rubber sleeve. The positioning column is fixedly installed at the bottom of the upper sealing plate. A mounting groove is opened in the middle of the positioning column. Connecting flanges are fixedly installed on the upper and lower ends of the outer sleeve. The upper and lower sealing plates are fixedly installed on the connecting flanges at the upper and lower ends of the outer sleeve by bolts and nuts. The first rubber sleeve is arranged between the positioning column and the outer sleeve, and a compacting piece is also arranged in the mounting groove.
9. The polytetrafluoroethylene isostatic pressing device according to claim 8, characterized in that: A first fixing groove is formed on both the upper sealing plate and the lower sealing plate, and a second fixing groove is formed on the connecting flanges at the upper and lower ends of the outer sleeve. The first fixing groove and the second fixing groove are both used to position the first rubber sleeve. A second rubber sleeve is also provided on the lower sealing plate, and the second rubber sleeve is provided in the first fixing groove on the connecting flange below the outer sleeve. A number of through holes are evenly formed on the lower sealing plate and the outer sleeve.
10. The polytetrafluoroethylene isostatic pressing device according to claim 9, characterized in that: The compaction part includes a fourth threaded rod, a compaction ring, a vertical rod, a connecting rod and a connecting plate. The fourth threaded rod is rotatably installed on the mounting groove. The compaction ring is arranged between the first rubber sleeve and the positioning column. The vertical rod is fixedly installed on the top of the compaction ring. A bend is arranged on the top of the vertical rod. The connecting rod is arranged in the mounting groove and the connecting rod is fixedly installed below the bend. The connecting plate is fixedly installed on the bottom of the connecting rod. The connecting plate is threadedly connected to the fourth threaded rod. A second hexagonal nut is arranged on the top of the fourth threaded rod.