A U-shaped diaphragm fabrication device

Abstract

This utility model discloses a U-shaped diaphragm fabrication device, relating to the field of molding die technology. It includes an inner model and an outer model, with a U-shaped groove formed on the outer model. The shape of the inner model matches the shape of the U-shaped groove. The sheet to be processed is placed between the inner and outer models. Both the inner and outer models are equipped with heating devices. This U-shaped diaphragm fabrication device enables the PTFE grinding disc U-ring to form a single unit, resulting in a more robust joint connection. It also allows planar PTFE to be formed into a U-shape, facilitating the subsequent addition of EPDM rubber to the U-ring to create an E+PTFE overlay gasket.

Description

Technical Field

[0001] This utility model relates to the field of molding die technology, and in particular to a U-shaped diaphragm manufacturing device. Background Technology

[0002] In the process of producing PTFE-coated gaskets using PTFE sheets, it is very difficult to coat EPDM if the PTFE sheets are not first made into a U-shaped structure. Even if coating is achieved, it will result in uneven PTFE coating on the top and bottom of the PTFE-coated ring. Simply connecting the joints with a welding gun is not secure and is prone to cracking at the joint. Therefore, it is necessary to design a special equipment that can process PTFE sheets into U-shaped membranes. Utility Model Content

[0003] The purpose of this invention is to provide a U-shaped diaphragm fabrication device to solve the problems existing in the prior art. It enables the PTFE grinding disc and U-shaped ring to form a whole, making the joint connection more secure. It also enables the planar PTFE to be formed into a U-shape, making it easier to add EPDM rubber to the U-shaped ring and make E+PTFE coated gaskets.

[0004] To achieve the above objectives, the present invention provides the following solution: The present invention provides a U-shaped diaphragm manufacturing device, including an inner model and an outer model, wherein a U-shaped groove is formed on the outer model, and the shape of the inner model matches the shape of the U-shaped groove; the sheet to be processed is placed between the inner model and the outer model; both the inner model and the outer model are provided with heating devices.

[0005] In one embodiment, the inner model is an inner copper model, and the outer model is an outer copper model.

[0006] In one embodiment, the heating device includes an electric heating tube one and an electric heating tube two. The electric heating tube one is inserted inside the inner model and is used to heat the inner model. The electric heating tube two is inserted inside the outer model and is used to heat the outer model.

[0007] In one embodiment, multiple thermocouples are evenly distributed on the inner model, and the thermocouples are used to detect the temperature of the inner model.

[0008] In one embodiment, multiple thermocouples are evenly distributed on the outer model, and the thermocouples are used to detect the temperature of the outer model.

[0009] In one embodiment, a pressurizing device is also included for pressurizing the outer model.

[0010] In one embodiment, a pressure surface is symmetrically arranged on the outer periphery of the outer model, and the pressure device is used to apply pressure to the U-shaped diaphragm fabrication device by applying pressure to the pressure surface.

[0011] In one embodiment, a sodium naphthalene solution is applied to the joint of the sheet to be processed.

[0012] In one embodiment, the joint of the sheet to be processed is welded using a welding gun, and the welded joint is placed in the U-shaped groove of the outer model.

[0013] In one embodiment, the inner model is a disc-shaped structure, the outer model is a segmented structure, the inner cavity of the outer model is provided with the U-shaped groove, and the outer periphery of the inner model matches the U-shaped groove and is placed in the U-shaped groove.

[0014] The present invention achieves the following beneficial technical effects compared to the prior art:

[0015] This invention provides a U-shaped diaphragm fabrication device, comprising an inner model and an outer model. The outer model has a U-shaped groove, and the shape of the inner model matches the shape of the U-shaped groove. The sheet to be processed is placed between the inner and outer models. Both the inner and outer models are equipped with heating devices. This U-shaped diaphragm fabrication device enables the PTFE grinding disc U-ring to form a single unit, resulting in a more secure joint connection. It also allows planar PTFE to be formed into a U-shape, facilitating the subsequent addition of EPDM rubber to the U-ring to create an E+PTFE overlay gasket. Attached Figure Description

[0016] To more clearly illustrate the technical solutions in the embodiments of this utility model or the prior art, the drawings used in the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0017] Figure 1 An external view of the apparatus for fabricating a U-shaped diaphragm;

[0018] Figure 2 for Figure 1 Sectional view along line AA in the middle;

[0019] The components are: 1. Sheet to be processed; 2. Inner model; 3. Outer model; 4. Electric heating tube one; 5. Electric heating tube two; 6. Thermocouple one; 7. Thermocouple two; 8. Pressurized surface. Detailed Implementation

[0020] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0021] The purpose of this invention is to provide a U-shaped diaphragm fabrication device to solve the problems existing in the prior art. It enables the PTFE grinding disc and U-shaped ring to form a whole, making the joint connection more secure. It also enables the planar PTFE to be formed into a U-shape, making it easier to add EPDM rubber to the U-shaped ring and make E+PTFE coated gaskets.

[0022] To make the above-mentioned objectives, features and advantages of this utility model more apparent and understandable, the utility model will be further described in detail below with reference to the accompanying drawings and specific embodiments.

[0023] like Figures 1-2 As shown, this utility model provides a U-shaped diaphragm manufacturing device, including an inner model 2 and an outer model 3. The outer model 3 has a U-shaped groove, and the shape of the inner model 2 matches the shape of the U-shaped groove. The sheet to be processed 1 is placed between the inner model 2 and the outer model 3. Both the inner model 2 and the outer model 3 are equipped with heating devices.

[0024] A sheet of material 1 of a certain width is cut to a certain length. The joints of the sheet 1 are treated, generally with sodium naphthalene solution, and then cleaned. The heating equipment is started to heat the inner mold 2 and the outer mold 3 to the required temperature. The joints are then welded with a special welding gun and placed into the U-shaped groove of the outer mold 3. The outer mold 3 is then placed onto the inner mold 2, pressing the sheet 1 into shape. After a certain temperature and time, the formed U-shaped PTFE membrane is removed and cooled to room temperature.

[0025] This U-shaped diaphragm fabrication device can form a PTFE grinding disc U-shaped ring into a whole, making the joint connection more secure. It can also form a U-shape from a flat PTFE sheet, making it easier to add EPDM rubber to the U-shaped ring to make an E+PTFE coated gasket.

[0026] Example 1

[0027] The U-shaped diaphragm fabrication apparatus in this embodiment is applied to PTFE sheet forming, specifically:

[0028] The PTFE sheet is sandwiched between the inner mold 2 and the outer mold 3. An electric heating tube 4 runs through the interior of the inner mold 2 to heat it. An electric heating tube 5 runs through the interior of the outer mold 3 to heat it. Four thermocouples 6 are evenly distributed around the circumference of the inner mold 2 to detect its temperature. Four thermocouples 7 are evenly distributed around the circumference of the outer mold 3 to detect its temperature. A pressure surface 8 is symmetrically arranged around the circumference of the outer mold 3. A pressurizing device applies pressure to the device through this pressure surface 8, allowing the PTFE sheet to withstand a certain pressure. The pressurizing device can be a hydraulic cylinder or a pressurizing pump station, etc.

[0029] The advantages of this device are: it can form a whole PTFE grinding disc U-ring, making the joint connection more secure; it can form a U-shape from a flat PTFE, making it easier to add EPDM rubber to the U-ring and make E+PTFE coated gaskets.

[0030] If PTFE sheets are not made into a U-shaped structure, it is very difficult to coat EPDM with PTFE. Even if it is managed to coat them, it will cause unevenness in the amount of PTFE coating film on the top and bottom of the PTFE coating ring. Simply connecting the joints with a welding gun is not strong and is prone to cracking at the joint. Using this device to heat and pressurize the PTFE sheets can make the joints fuse again, increasing the strength of the joint.

[0031] In another embodiment, the inner model 2 is an inner copper model, and the outer model 3 is an outer copper model.

[0032] like Figures 1-2 As shown, in one embodiment, the inner model 2 is a disc-shaped structure, the outer model 3 adopts a segmented structure, the inner cavity of the outer model 3 is provided with a U-shaped groove, and the outer periphery shape of the inner model 2 matches the U-shaped groove and is placed in the U-shaped groove.

[0033] The specific usage of the U-shaped diaphragm fabrication device is as follows:

[0034] ① Cut a PTFE sheet of a certain width into a certain length.

[0035] ② The joints are treated, generally with sodium naphthalene solution, and then cleaned.

[0036] ③ Connect the heating element and thermocouple of the above device to a temperature controller (a commercially available temperature controller can be used) for control. Heat the equipment to the required temperature.

[0037] ④ After welding the joint with a special welding gun, place it into the outer copper mold.

[0038] ⑤ Attach the outer copper model to the inner copper model and apply pressure to the two pressure surfaces 8 using a special pressure device.

[0039] ⑥ The formed U-shaped PTFE membrane is removed under certain temperature, pressure and time conditions and cooled to room temperature.

[0040] It should be noted that, for those skilled in the art, it is obvious that this utility model is not limited to the details of the above exemplary embodiments, and that it can be implemented in other specific forms without departing from the spirit or essential characteristics of this utility model. Therefore, the embodiments should be considered exemplary and non-limiting in all respects, and the scope of this utility model is defined by the appended claims rather than the foregoing description. Therefore, all variations falling within the meaning and scope of equivalents of the claims are intended to be included within this utility model, and no reference numerals in the claims should be construed as limiting the scope of the claims.

[0041] This utility model uses specific examples to illustrate its principles and implementation methods. The above description of the embodiments is only for the purpose of helping to understand the method and core idea of ​​this utility model. At the same time, for those skilled in the art, there will be changes in the specific implementation methods and application scope based on the idea of ​​this utility model. In summary, the content of this specification should not be construed as a limitation of this utility model.

Claims

1. A U-shaped diaphragm fabrication apparatus, characterized in that: It includes an inner model and an outer model. The outer model has a U-shaped groove, and the shape of the inner model matches the shape of the U-shaped groove. The sheet to be processed is placed between the inner model and the outer model. Both the inner model and the outer model are equipped with heating devices.

2. The U-shaped diaphragm fabrication apparatus according to claim 1, characterized in that: The inner model is made of inner copper, and the outer model is made of outer copper.

3. The U-shaped diaphragm fabrication apparatus according to claim 1, characterized in that: The heating device includes an electric heating tube one and an electric heating tube two. The electric heating tube one is inserted inside the inner model and is used to heat the inner model. The electric heating tube two is inserted inside the outer model and is used to heat the outer model.

4. The U-shaped diaphragm fabrication apparatus according to claim 1, characterized in that: Multiple thermocouples are evenly distributed on the inner model, and the thermocouples are used to detect the temperature of the inner model.

5. The U-shaped diaphragm fabrication apparatus according to claim 1, characterized in that: Multiple thermocouples are evenly distributed on the outer model, and the thermocouples are used to detect the temperature of the outer model.

6. The U-shaped diaphragm fabrication apparatus according to claim 1, characterized in that: It also includes a pressurizing device for pressurizing the outer model.

7. The U-shaped diaphragm fabrication apparatus according to claim 6, characterized in that: The outer periphery of the outer model is symmetrically provided with a pressure surface, and the pressure device is used to apply pressure to the pressure surface to apply pressure to the U-shaped diaphragm manufacturing device.

8. The U-shaped diaphragm fabrication apparatus according to claim 1, characterized in that: The joints of the sheet to be processed are coated with sodium naphthalene solution.

9. The U-shaped diaphragm fabrication apparatus according to claim 1, characterized in that: The joints of the sheet to be processed are welded using a welding gun, and the welded joints are placed in the U-shaped groove of the outer model.

10. The U-shaped diaphragm fabrication apparatus according to claim 1, characterized in that: The inner model has a disc-shaped structure, and the outer model has a segmented structure. The inner cavity of the outer model has the U-shaped groove, and the outer periphery of the inner model matches the U-shaped groove and is placed in the U-shaped groove.

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