Polytetrafluoroethylene sealing ring compression molding equipment

Abstract

The utility model discloses compression molding equipment for a polytetrafluoroethylene sealing ring, which belongs to the technical field of sealing ring forming and comprises an upper template and a lower template, the two air cylinders are arranged on the two sides of the lower die plate correspondingly, and the output ends of the two air cylinders are arranged on the two sides of the bottom end of the upper die plate correspondingly. According to the utility model, the formed polytetrafluoroethylene sealing ring in the forming groove can be smoothly ejected out, the automatic demolding process is realized, and meanwhile, the two fans positioned in the fixed mold block are synchronously started and blow cold air to the polytetrafluoroethylene sealing ring which is just formed through a plurality of air outlets which are elaborately arranged, so that the polytetrafluoroethylene sealing ring can be automatically demolded. The rapid and uniform cooling treatment is carried out, the forming efficiency of the sealing ring is greatly improved in the process, it is effectively ensured that the sealing ring can be more smoothly ejected out after being cooled and shaped, and it is avoided that the sealing ring is difficult to take out due to adhesion or deformation; therefore, the use practicability and the production efficiency of the polytetrafluoroethylene sealing ring compression molding equipment are better.

Description

Technical Field

[0001] This utility model belongs to the field of sealing ring molding technology, specifically relating to a polytetrafluoroethylene sealing ring compression molding equipment. Background Technology

[0002] A PTFE (polytetrafluoroethylene) sealing ring compression molding machine is a mechanical device used to mold PTFE material into a sealing ring under pressure through a mold. The principle of this machine is to add powdered, granular, or fibrous PTFE raw material into a molding die, soften and deform the material by heating, then fill the die under pressure, close the die, and pressurize to solidify, ultimately obtaining the desired sealing ring product. Through precise mold design and molding processes, the PTFE sealing ring compression molding machine not only ensures the physical properties, shape, and dimensional accuracy of the sealing ring but also significantly improves production efficiency and reduces production costs.

[0003] Chinese Patent Publication No. CN217073082U relates to the field of plastic processing technology, specifically to a sealing ring compression molding equipment, including a lower mold, a spring, a support plate, a contour ring, a lifting mechanism, an upper mold, multiple pressure rods, and multiple demolding pins. The lower mold has multiple insertion holes and a lower circular groove; the upper mold has an upper circular groove. The lifting mechanism drives the upper mold to move downwards and fit against the lower mold. At the same time, the pressure rods insert into the insertion holes, pushing the support plate downwards and compressing the spring. The downward movement of the support plate causes the contour ring to move slightly downwards from the lower circular groove, filling the lower and upper circular grooves with processing material. After the sealing ring is processed, the lifting mechanism drives the upper mold to move upwards, the spring returns to its original state, and pushes the contour ring upwards, pushing the sealing ring out from the lower circular groove. The sealing ring will then be in the upper circular groove. Rotating the multiple demolding pins causes them to move downwards, pushing the sealing ring in the upper circular groove, thus making demolding more convenient.

[0004] In practical use, this utility model typically relies on an ejection assembly to eject the molded sealing ring. However, the ejection assembly structure of existing PTFE sealing ring molding equipment is often designed to be relatively simple and lacks diversity. This can result in uneven force applied during ejection, causing the PTFE sealing ring to deform during the ejection process. Sometimes, the sealing ring may even fail to be ejected successfully, which not only affects the product quality of the sealing ring but also reduces the reliability and practicality of the PTFE sealing ring molding equipment in practical applications. Utility Model Content

[0005] This invention provides a polytetrafluoroethylene (PTFE) sealing ring molding equipment to solve the problem of the difficulty in effectively ejecting PTFE sealing rings in the prior art.

[0006] To achieve the above objectives, this utility model provides the following technical solution: a polytetrafluoroethylene (PTFE) sealing ring molding equipment, comprising:

[0007] Upper template and lower template;

[0008] Two cylinders are respectively located on both sides of the lower template, and the output ends of the two cylinders are respectively located on both sides of the bottom end of the upper template. The bottom end of the upper template is provided with a moving module, and the upper end of the lower template is provided with a pad plate. The upper end of the pad plate is provided with a stationary module.

[0009] A forming groove is provided on the upper end of the fixed module, and an annular groove adapted to the forming groove is provided at the bottom end of the moving module. A matching ejection ring is provided inside the forming groove.

[0010] Two limiting grooves are respectively opened on both sides of the fixed module, and each of the two limiting grooves is provided with a limiting plate. The two limiting plates are respectively set on both sides of the top ring at opposite ends.

[0011] A rectangular groove is formed within a fixed module. A positioning shaft is rotatably connected within the rectangular groove. An installation plate is fitted around the outside of the positioning shaft. The upper end of the positioning shaft passes through the rectangular groove and is provided with a ventilation plate.

[0012] In a preferred embodiment, each of the two limiting grooves has a positioning groove at its bottom end, and both ends of the mounting plate extend into the two positioning grooves respectively. The moving module has positioning rods on both sides of its bottom end, and the bottom ends of the two positioning rods pass through the two limiting grooves and the two limiting plates respectively, and are located in the two positioning grooves respectively. The bottom ends of the two positioning rods are respectively set on both sides of the upper end of the mounting plate.

[0013] In order to push out the molded polytetrafluoroethylene sealing ring, a limiting spring is further provided on the outer side of each of the two positioning rods. The two ends of the limiting spring are respectively set at the bottom end of the limiting groove and the top end of the limiting plate. A limiting ring is provided on the outer side of the positioning rod located in the positioning groove.

[0014] In a preferred embodiment, the upper end of the fixed module is provided with an annular plate, the ventilation plate abuts against the upper end of the annular plate, the annular plate is provided with an air storage groove, the ventilation plate is provided with a ventilation groove, and the side wall of the ventilation groove is provided with multiple inclined air outlets.

[0015] In a preferred embodiment, the upper end of the annular plate is provided with an air guide ring that connects to the air storage groove. The upper end of the air guide ring passes through the ventilation plate and extends into the ventilation groove.

[0016] In a preferred embodiment, the upper ends of the rectangular groove are provided with snap-fit ​​grooves on both sides, each snap-fit ​​groove is provided with a matching fan, the upper ends of the two snap-fit ​​grooves are provided with air supply grooves, and the upper ends of the two air supply grooves are connected to the air storage groove.

[0017] In a preferred embodiment, the mounting plate has a mounting hole that is adapted to the positioning shaft. The positioning shaft passes through the mounting hole and is slidably connected to the side wall of the mounting hole. A spiral groove is formed on the outer side of the positioning shaft. A mounting pin adapted to the spiral groove is provided on one side of the mounting hole. One end of the mounting pin is located in the spiral groove and is slidably connected to the side wall of the spiral groove.

[0018] To further filter dust or impurities in the air, the bottom of the rectangular groove is provided with multiple air inlets, and the pad located at the bottom of the multiple air inlets is provided with an air intake groove, and a filter plate is provided in the air intake groove.

[0019] Compared with the prior art, the beneficial effects of this utility model are:

[0020] 1. This utility model, through the positioning rods and limiting rings set on both sides of the bottom of the moving module, can effectively drive the two limiting plates and the ejector ring to rise synchronously when the upper template moves upward to a certain position under the action of driving force. This allows the polytetrafluoroethylene (PTFE) sealing ring that has been formed inside the molding groove to be smoothly ejected, realizing an automated demolding process. At the same time, the two fans located inside the fixed module start synchronously. They blow cold air to the newly formed PTFE sealing ring through multiple carefully arranged air outlets for rapid and uniform cooling. This process greatly improves the efficiency of sealing ring forming and effectively ensures that the sealing ring can be ejected more smoothly after cooling and shaping, avoiding difficulties in removal due to adhesion or deformation. This makes the PTFE sealing ring molding equipment more practical and efficient in production.

[0021] 2. This utility model, through the mounting plate set at the bottom of the two positioning rods and the mounting pin inside it, and in conjunction with the spiral groove on the outside of the positioning shaft, allows the mounting pin to tightly engage with the spiral groove on the outside of the positioning shaft when the two positioning rods drive the mounting plate to move upward. This drives the positioning shaft and the ventilation plate connected to it to rotate, and the ventilation plate can drive multiple air outlets to rotate as well. This ensures that the cooling air can evenly and comprehensively cover all parts of the PTFE sealing ring, achieving a highly efficient and uniform blowing cooling process. This not only significantly improves the cooling efficiency but also effectively ensures the quality stability of the PTFE sealing ring during the molding process, thereby ensuring that the molding equipment can meet the high-standard quality requirements when producing PTFE sealing rings. Attached Figure Description

[0022] Figure 1 This is a schematic diagram of the main appearance of the structure of this utility model;

[0023] Figure 2 This is a schematic front cross-sectional view of the structure of this utility model;

[0024] Figure 3 This is a cross-sectional schematic diagram of the annular plate and the ventilation plate of the present invention.

[0025] Figure 4 This is a schematic diagram showing the connection between the ejector ring and the limiting plate in the structure of this utility model;

[0026] Figure 5 for Figure 2 A magnified schematic diagram of the structure at point A in the middle.

[0027] In the diagram: 1. Upper template; 2. Lower template; 3. Cylinder; 4. Moving module; 5. Pad plate; 6. Fixed module; 7. Ejection ring; 8. Limiting plate; 9. Positioning shaft; 10. Ventilation plate; 11. Positioning rod; 12. Limiting spring; 13. Annular plate; 14. Air outlet; 15. Air guide ring; 16. Fan; 17. Mounting pin; 18. Air inlet; 19. Filter plate; 20. Mounting plate; 21. Limiting ring. Detailed Implementation

[0028] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments of the present utility model. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments.

[0029] Example 1:

[0030] Please see Figure 1-5 This utility model provides a polytetrafluoroethylene sealing ring compression molding equipment, comprising:

[0031] Upper template 1 and lower template 2;

[0032] Two cylinders 3 are respectively set on both sides of the lower template 2. The output ends of the two cylinders 3 are respectively set on both sides of the bottom end of the upper template 1. The bottom end of the upper template 1 is provided with a moving module 4, and the upper end of the lower template 2 is provided with a pad 5. The upper end of the pad 5 is provided with a stationary module 6.

[0033] A forming groove is provided on the upper end of the fixed module 6, and an annular groove adapted to the forming groove is provided on the bottom end of the moving module 4. A matching ejection ring 7 is provided inside the forming groove.

[0034] Two limiting slots are respectively opened on both sides of the fixed module 6, and each of the two limiting slots is provided with a limiting plate 8. The two limiting plates 8 are respectively set on both sides of the ejection ring 7 at opposite ends.

[0035] A rectangular groove is formed inside the fixed module 6. A positioning shaft 9 is rotatably connected inside the rectangular groove. An installation plate 20 is sleeved on the outside of the positioning shaft 9. The upper end of the positioning shaft 9 passes through the rectangular groove and is provided with a ventilation plate 10.

[0036] Specifically, such as Figure 2As shown, both limiting grooves have positioning grooves at their bottom ends. The two ends of the mounting plate 20 extend into the two positioning grooves respectively. The bottom ends of the moving module 4 are provided with positioning rods 11 on both sides. The bottom ends of the two positioning rods 11 pass through the two limiting grooves and the two limiting plates 8 respectively, and are located in the two positioning grooves respectively. The two positioning rods 11 can limit the up and down movement of the moving module 4 to prevent its position from shifting, thereby ensuring the accuracy of the molding of the polytetrafluoroethylene sealing ring. The bottom ends of the two positioning rods 11 are respectively set on both sides of the upper end of the mounting plate 20. When the two positioning rods 11 move, they can drive the bottom mounting plate 20 to move synchronously.

[0037] Specifically, such as Figure 2 As shown, a limiting spring 12 is sleeved on the outer side of each of the two positioning rods 11. The two ends of the limiting spring 12 are respectively set at the bottom end of the limiting groove and the top end of the limiting plate 8. A limiting ring 21 is sleeved on the outer side of the positioning rod 11 located in the positioning groove.

[0038] Through its design, when the two positioning rods 11 move upward to a certain position, they will drive the two limiting plates 8 to move through the two limiting rings 21 respectively, thereby driving the ejector ring 7 to move upward and ejecting the polytetrafluoroethylene sealing ring in the molding groove. The limiting spring 12 can ensure that when the limiting ring 21 is separated from the limiting plate 8, the limiting plate 8 can always be located at the bottom of the limiting groove. The two limiting plates 8 can ensure that the ejector ring 7 is always located at the bottom of the molding groove, thereby forming the polytetrafluoroethylene sealing ring.

[0039] Specifically, such as Figure 2 and Figure 3 As shown, the upper end of the fixed module 6 is provided with an annular plate 13, and the ventilation plate 10 abuts against the upper end of the annular plate 13. An air storage groove is opened in the annular plate 13, and a ventilation groove is opened in the ventilation plate 10. The side wall of the ventilation groove is provided with multiple inclined air outlets 14. The multiple inclined air outlets 14 can make the air blow precisely onto the polytetrafluoroethylene sealing ring.

[0040] Specifically, such as Figure 2 and Figure 5 As shown, the upper end of the annular plate 13 is provided with an air guide ring 15 that connects to the air storage groove. The upper end of the air guide ring 15 passes through the ventilation plate 10 and extends into the ventilation groove. The air guide ring 15 can also introduce the air in the air storage groove into the ventilation groove without affecting the rotation of the ventilation plate 10, thereby effectively delivering the air to the air outlet 14 to cool and form the polytetrafluoroethylene sealing ring.

[0041] Specifically, such as Figure 2 As shown, the upper end of the rectangular groove is provided with a snap-fit ​​groove on both sides, and a matching fan 16 is provided in each of the two snap-fit ​​grooves. The fan 16 is existing technology and will not be described in detail here. An air supply groove is provided at the upper end of each of the two snap-fit ​​grooves, and the upper end of each of the two air supply grooves is connected to the air storage groove. When the two fans 16 are started, air can be introduced into the air storage groove through the two air supply grooves.

[0042] Specifically, such as Figure 2 and Figure 5 As shown, the mounting plate 20 has a mounting hole that is adapted to the positioning shaft 9. The positioning shaft 9 passes through the mounting hole and is slidably connected to the side wall of the mounting hole. A spiral groove is opened on the outer side of the positioning shaft 9. A mounting pin 17 adapted to the spiral groove is provided on one side of the mounting hole. One end of the mounting pin 17 is located in the spiral groove and is slidably connected to the side wall of the spiral groove. When the mounting plate 20 moves, it can drive the positioning shaft 9 to rotate through the mounting pin 17 and the spiral groove, thereby driving the upper ventilation plate 10 to rotate. The ventilation plate 10 will drive the air outlet 14 to rotate, so that air can be blown evenly and comprehensively onto the polytetrafluoroethylene sealing ring, ensuring the efficiency of the polytetrafluoroethylene sealing ring molding.

[0043] See Figure 1-5 When using compression molding equipment to produce polytetrafluoroethylene (PTFE) sealing rings, the PTFE sealing ring raw material is first placed in the molding tank. Then, two cylinders 3 are activated. The output ends of the two cylinders 3 drive the upper template 1 and the moving module 4 downwards, molding the PTFE sealing ring in the molding tank. After molding, the two cylinders 3 are activated again to drive the upper template 1 and the moving module 4 upwards. The moving module 4 drives two positioning rods 11 to move, which in turn drives the bottom mounting plate 20 to move. When the two positioning rods 11 move upwards to a certain position, two limit rings 21 drive two limit plates 8 upwards, which in turn drive the ejector ring 7 upwards, thus molding the PTFE sealing ring in the molding tank. During the upward movement of the upper template 1 and the moving module 4, two fans 16 need to be activated. The two fans 16 draw outside air into the air storage tank and guide the air through the air guide ring 15 into the ventilation slot in the ventilation plate 10. The air is then discharged through multiple air outlets 14 and blown onto the PTFE sealing ring to accelerate its cooling and molding efficiency. When the mounting plate 20 moves upward, it drives the positioning shaft 9 to rotate through the mounting pin 17 and the spiral groove. The positioning shaft 9 drives the ventilation plate 10 and multiple air outlets 14 to rotate, so that the air can be blown evenly and comprehensively onto the PTFE sealing ring, ensuring the quality stability of the PTFE sealing ring during the molding process, and enabling the ejection ring 7 to smoothly eject the PTFE sealing ring.

[0044] Example 2:

[0045] Please see Figure 1-5 This utility model provides a polytetrafluoroethylene sealing ring compression molding equipment, comprising:

[0046] Upper template 1 and lower template 2;

[0047] Two cylinders 3 are respectively set on both sides of the lower template 2. The output ends of the two cylinders 3 are respectively set on both sides of the bottom end of the upper template 1. The bottom end of the upper template 1 is provided with a moving module 4, and the upper end of the lower template 2 is provided with a pad 5. The upper end of the pad 5 is provided with a stationary module 6.

[0048] A forming groove is provided on the upper end of the fixed module 6, and an annular groove adapted to the forming groove is provided on the bottom end of the moving module 4. A matching ejection ring 7 is provided inside the forming groove.

[0049] Two limiting slots are respectively opened on both sides of the fixed module 6, and each of the two limiting slots is provided with a limiting plate 8. The two limiting plates 8 are respectively set on both sides of the ejection ring 7 at opposite ends.

[0050] A rectangular groove is formed inside the fixed module 6. A positioning shaft 9 is rotatably connected inside the rectangular groove. An installation plate 20 is sleeved on the outside of the positioning shaft 9. The upper end of the positioning shaft 9 passes through the rectangular groove and is provided with a ventilation plate 10.

[0051] Specifically, such as Figure 2 As shown, a rectangular groove has multiple air inlets 18 penetrating through its bottom end, and a pad 5 located at the bottom end of the multiple air inlets 18 has an air inlet groove penetrating through it. A filter plate 19 is provided inside the air inlet groove.

[0052] Its design allows for the filtration of dust or impurities in the outside air through the filter plate 19 installed in the air inlet slot, preventing dust or impurities from affecting the molding of the PTFE sealing ring, thus making the PTFE sealing ring molding equipment more practical.

[0053] Although embodiments of the present invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the present invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. A polytetrafluoroethylene (PTFE) sealing ring molding equipment, characterized in that, include: Upper template (1) and lower template (2); Two cylinders (3) are respectively set on both sides of the lower template (2). The output ends of the two cylinders (3) are respectively set on both sides of the bottom end of the upper template (1). The bottom end of the upper template (1) is provided with a moving module (4). The upper end of the lower template (2) is provided with a pad (5). The upper end of the pad (5) is provided with a stationary module (6). A forming groove is provided on the upper end of the fixed module (6), and an annular groove adapted to the forming groove is provided at the bottom end of the moving module (4). A matching ejection ring (7) is provided in the forming groove. Two limiting grooves are respectively opened on both sides of the fixed module (6), and each of the two limiting grooves is provided with a limiting plate (8). The two limiting plates (8) are respectively set on both sides of the top ring (7) at opposite ends. A rectangular groove is formed inside the fixed module (6). A positioning shaft (9) is rotatably connected inside the rectangular groove. An installation plate (20) is sleeved on the outside of the positioning shaft (9). The upper end of the positioning shaft (9) passes through the rectangular groove and is provided with a ventilation plate (10).

2. The polytetrafluoroethylene sealing ring molding equipment according to claim 1, characterized in that: The bottom ends of the two limiting grooves are provided with positioning grooves. The two ends of the mounting plate (20) extend into the two positioning grooves respectively. The bottom ends of the moving module (4) are provided with positioning rods (11). The bottom ends of the two positioning rods (11) pass through the two limiting grooves and the two limiting plates (8) respectively, and are located in the two positioning grooves respectively. The bottom ends of the two positioning rods (11) are respectively set on the upper ends of the mounting plate (20).

3. The polytetrafluoroethylene sealing ring molding equipment according to claim 2, characterized in that: Both positioning rods (11) are fitted with limiting springs (12) on their outer sides. The two ends of the limiting springs (12) are respectively located at the bottom end of the limiting groove and the top end of the limiting plate (8). The positioning rods (11) located in the positioning groove are fitted with limiting rings (21) on their outer sides.

4. The polytetrafluoroethylene sealing ring molding equipment according to claim 1, characterized in that: The fixed module (6) is provided with an annular plate (13) at its upper end. The ventilation plate (10) abuts against the upper end of the annular plate (13). An air storage groove is provided in the annular plate (13). A ventilation groove is provided in the ventilation plate (10). The side wall of the ventilation groove is provided with multiple inclined air outlets (14).

5. The polytetrafluoroethylene sealing ring molding equipment according to claim 4, characterized in that: The upper end of the annular plate (13) is provided with an air guide ring (15) that connects to the air storage groove. The upper end of the air guide ring (15) passes through the ventilation plate (10) and extends into the ventilation groove.

6. The polytetrafluoroethylene sealing ring molding equipment according to claim 4, characterized in that: Both sides of the upper end of the rectangular groove are provided with snap-fit ​​grooves, and each of the two snap-fit ​​grooves is provided with a matching fan (16). Each of the two snap-fit ​​grooves is provided with an air supply groove at the upper end, and the upper end of each of the two air supply grooves is connected to the air storage groove.

7. The polytetrafluoroethylene sealing ring molding equipment according to claim 1, characterized in that: The mounting plate (20) is provided with a mounting hole that is adapted to the positioning shaft (9). The positioning shaft (9) passes through the mounting hole and is slidably connected to the side wall of the mounting hole. A spiral groove is provided on the outer side of the positioning shaft (9). A mounting pin (17) adapted to the spiral groove is provided on one side of the mounting hole. One end of the mounting pin (17) is located in the spiral groove and is slidably connected to the side wall of the spiral groove.

8. The polytetrafluoroethylene sealing ring molding equipment according to claim 1, characterized in that: The bottom end of the rectangular groove is provided with multiple air inlets (18), and the pad (5) located at the bottom end of the multiple air inlets (18) is provided with an air inlet groove, and a filter plate (19) is provided in the air inlet groove.

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