PE film gasket with sealing rib lines and production method of PE film gasket

Abstract

The invention belongs to the technical field of sealing gaskets, and discloses a PE film gasket with sealing rib lines and a production method thereof.The PE film gasket comprises a gasket body, the gasket body is provided with a main hole, a key groove hole, a bolt hole and a structural hole, the gasket body is made of polyethylene, the surface of the gasket body is coated with a coating layer made of silica gel, and the surface of the gasket body is provided with a sealing rib line. The front face of the gasket body is fixedly connected with a first sealing rib line surrounding the edges of the main hole and the key groove holes, and at least one key groove hole is connected with the first sealing rib line on the edge of the main hole in a fusion mode. According to the PE film gasket with the sealing rib lines and the production method of the PE film gasket, the PE film gasket is used for replacing conventional metal sealing gaskets, asbestos fiber-free sealing gaskets, rubber sealing gaskets and other sealing gaskets which are used in the same type, and the PE film gasket not only has good resilience sealing performance, but also has excellent mechanical strength, high temperature resistance, corrosion resistance, oil resistance and abrasion resistance.

Description

Technical Field

[0001] The present application relates to the technical field of sealing gaskets, and more specifically, to a PE film gasket with sealing ribs and a production method thereof. Background Art

[0002] Sealing gaskets are a common material used for sealing inside machinery, equipment, pipelines, etc. They are usually made of metal or non-metallic plate materials through cutting, stamping or cutting processes, and are used for sealing connections between pipelines. With the development of industrial technology and the expansion of the scope of use, people have put forward higher requirements for sealing gaskets, requiring them not only to have good rebound sealing properties, but also to have excellent mechanical strength, high temperature resistance, corrosion resistance, oil resistance and wear resistance.

[0003] Existing sealing gaskets mainly include metal sealing gaskets, asbestos sealing gaskets and asbestos-free non-metallic sealing gaskets. Asbestos sealing gaskets have excellent sealing performance and corrosion resistance, and are low in price, but it is internationally recognized that asbestos is a carcinogen, which poses a threat to the environment and people's health. Asbestos-free non-metallic gaskets have trace gaps between the fibers and rubber contained in them, have loose structures, low density, and low compressive strength. Benzene is often used as a solvent during use, which can cause certain harm to production personnel and the environment. There are also problems such as insufficient tensile strength, creep relaxation resistance and aging resistance. Although metal sealing gaskets can withstand a relatively large pressure range, their compression rebound performance is limited and their scope of application is narrow.

[0004] The Chinese invention patent with patent application number CN 108488382 A discloses a graphite sealing gasket, including a graphite sheet, a fluororesin layer on the graphite sheet, a polyethylene layer on the fluororesin layer, and a glass fiber layer on the polyethylene layer. The beneficial effect of this invention is that it has good strength, but it also has defects. Due to poor adhesion between the multiple layers, poor compatibility, large and insufficient differences in heat resistance and aging resistance, it is easy to move and deviate from the sealing groove, thereby causing leakage, seriously affecting the performance of the equipment.

[0005] Therefore, developing a sealing gasket that is light in weight, low in cost, and has excellent water resistance, high and low temperature resistance, acid and alkali resistance, aging resistance, and rebound sealing properties is of great significance to promoting the development of the sealing industry.

[0006] Polyethylene PE material is odorless, non-toxic, feels like wax, has good low temperature resistance, is resistant to most acid and alkali corrosion, and has good chemical stability. It can be used for a long time within the temperature range of 120°C, can withstand high temperatures of 150°C for short-term use, and can withstand low temperatures of -70°C. High and low temperatures have little effect on its mechanical properties. The material market is widely used and easy to obtain at a low price. Silica gel is a highly active adsorption material that is non-toxic, non-irritating, solvent-free, non-corrosive, and pollution-free. It is an amorphous substance. The main component of silica gel is silicon dioxide, which has stable chemical properties and does not burn. Since silica gel has greater elasticity and expansion, it has very outstanding advantages in terms of sealing.

[0007] In view of the characteristics of the above two materials, our company has developed a new type of gasket material and finished gasket application technology to replace conventional metal gaskets, asbestos-free fiber gaskets, rubber gaskets and other similar gaskets; it mainly overcomes and solves various deficiencies of other gaskets on the market. Summary of the invention

[0008] In order to solve the above problems, the present application provides a PE film gasket with sealing ribs and a production method thereof.

[0009] The present application provides a PE film gasket with sealing ribs and a production method thereof, which adopts the following technical solutions:

[0010] A PE film gasket with sealing ribs and a production method thereof, comprising a gasket body, the gasket body having a main hole, a keyway hole, a bolt hole and a structural hole, the gasket body being made of polyethylene, the surface of the gasket body being coated with a coating layer of silicone material, the front side of the gasket body being fixedly connected with a first sealing rib around the edge of the main hole and the keyway hole, the first sealing rib at the edge of at least one keyway hole and the main hole being fused and connected to each other, the front side of the gasket body being fixedly connected with a second sealing rib around the edge of the bolt hole, the gasket body being provided with a reinforced glue point at the edge where the keyway holes and the structural holes are densely distributed, and the materials of the first sealing rib, the second sealing rib and the reinforced glue point are all made of silicone.

[0011] Furthermore, the thickness of the gasket body is 0.2-0.5 mm, and the thickness of the coating layer is 0.05-0.1 mm.

[0012] Furthermore, the thickness of the first sealing rib line is 0.5-1 mm, and the width of the first sealing rib line is 2-4 mm.

[0013] Furthermore, the thickness of the second sealing rib line is 0.4-0.8 mm, and the width of the second sealing rib line is 1-2 mm.

[0014] Furthermore, the thickness of the reinforced glue point is 0.4-0.8 mm, the width of the reinforced glue point is 1-2 mm, and the length is 20-40 mm.

[0015] A method for manufacturing the above-mentioned PE film gasket with sealing ribs comprises the following steps:

[0016] Step 1: Punching and cutting: Put the PE film sheet that meets the thickness requirements into the punching machine and punch out the gasket embryo;

[0017] Step 2: Surface cleaning: Use alcohol or ultrasound to clean the surface of the gasket embryo;

[0018] Step 3: Use a corona machine to perform corona treatment on the surface of the gasket embryo to improve surface adhesion;

[0019] Step 4: Use a roller coater to apply a layer of silicone film on the surface of the gasket blank;

[0020] Step 5: Use a silk screen printer to print the sealing ribs on the edges of the main hole, keyway hole and bolt hole on the front of the gasket;

[0021] Step 6: Use a glue dispenser to set a reinforced glue point on the front of the gasket at the edge where the key slot holes and structural holes are densely distributed;

[0022] Step 7: Place the gasket in a curing box for curing, during which CO2 gas is introduced;

[0023] Step 8: After the curing is completed, the gasket is subjected to surface anti-sticking treatment and then packaged.

[0024] Furthermore, in step seven, the temperature in the curing box is set at 15-40° C. and the humidity is set at 30-80%.

[0025] In summary, the present application includes at least one of the following beneficial technical effects:

[0026] (1) It is lighter than metal pads and has higher strength than traditional fiber pads and rubber pads;

[0027] (2) Raw materials are easily available in the market, have little impact on market supply, and are economically priced;

[0028] (3) Through technical treatment of the surface silicone layer, the sealing performance indicators such as compression rebound rate can be designed and adjusted, reducing the technical development of the material itself;

[0029] (4) Its superior water resistance, high and low temperature resistance, acid and alkali resistance, and electrical properties also solve the technical performance defects of traditional gaskets. Since gaskets are usually used in closed parts of pipes and flange connections, their impact on aging problems caused by photooxidation is greatly reduced. BRIEF DESCRIPTION OF THE DRAWINGS

[0030] Figure 1 This is a schematic diagram of the structure of a PE film gasket product with sealing ribs in this application;

[0031] Figure 2 This is a schematic diagram of the production method of the PE film gasket product with sealing ribs in this application.

[0032] Description of the numbers in the figure:

[0033] 1. Gasket body; 2. Coating layer; 3. First sealing rib line; 4. Second sealing rib line; 5. Strengthening glue point; 11. Main hole; 12. Keyway hole; 13. Bolt hole; 14. Structural hole. DETAILED DESCRIPTION

[0034] The technical solutions in the embodiments of the present application will be clearly and completely described below in conjunction with the drawings in the embodiments of the present application; obviously, the described embodiments are only part of the embodiments of the present application, rather than all the embodiments, and all other embodiments obtained by ordinary technicians in this field based on the embodiments in the present application without making creative work are within the scope of protection of the present application.

[0035] In the description of the present application, it should be noted that the terms "upper", "lower", "inner", "outer", "top / bottom" and the like indicate positions or positional relationships based on the positions or positional relationships shown in the drawings, and are only for the convenience of describing the present application and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific position, be constructed and operated in a specific position, and therefore cannot be understood as limiting the present application. In addition, the terms "first" and "second" are used for descriptive purposes only, and cannot be understood as indicating or implying relative importance.

[0036] In the description of this application, it should be noted that, unless otherwise clearly specified and limited, the terms "installed", "provided with", "set / connected", "connected", etc. should be understood in a broad sense. For example, "connected" can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection, or it can be indirectly connected through an intermediate medium, or it can be the internal communication of two components. For ordinary technicians in this field, the specific meanings of the above terms in this application can be understood according to specific circumstances.

[0037] Embodiment 1:

[0038] The embodiment of the present application first discloses a PE film gasket with sealing ribs, including a gasket body, the gasket body having a main hole, a keyway hole, a bolt hole and a structural hole, the gasket body being made of polyethylene, the surface of the gasket body being coated with a coating layer of silicone material, the front side of the gasket body being fixedly connected with a first sealing rib around the edge of the main hole and the keyway hole, the first sealing ribs at at least one keyway hole and the edge of the main hole being fused and connected to each other, the front side of the gasket body being fixedly connected with a second sealing rib around the edge of the bolt hole, the gasket body being provided with reinforced glue points at the edge where the keyway holes and the structural holes are densely distributed, and the materials of the first sealing ribs, the second sealing ribs and the reinforced glue points are all made of silicone.

[0039] Preferably, the thickness of the gasket body is 0.2 mm, and the thickness of the coating layer is 0.05 mm.

[0040] Preferably, the thickness of the first sealing rib line is 0.5 mm, and the width of the first sealing rib line is 2 mm.

[0041] Furthermore, the thickness of the second sealing rib line is 0.4 mm, and the width of the second sealing rib line is 1 mm.

[0042] Preferably, the thickness of the reinforced glue point is 0.4 mm, the width of the reinforced glue point is 1 mm, and the length is 20 mm.

[0043] This embodiment also discloses a method for manufacturing the above-mentioned PE film gasket with sealing ribs, comprising the following steps:

[0044] Step 1: Punching and cutting: Put the PE film sheet that meets the thickness requirements into the punching machine and punch out the gasket embryo;

[0045] Step 2: Surface cleaning: Use alcohol or ultrasound to clean the surface of the gasket embryo;

[0046] Step 3: Use a corona machine to perform corona treatment on the surface of the gasket embryo to improve surface adhesion;

[0047] Step 4: Use a roller coater to apply a layer of silicone film on the surface of the gasket blank;

[0048] Step 5: Use a silk screen printer to print the sealing ribs on the edges of the main hole, keyway hole and bolt hole on the front of the gasket;

[0049] Step 6: Use a glue dispenser to set a reinforced glue point on the front of the gasket at the edge where the key slot holes and structural holes are densely distributed;

[0050] Step 7: Place the gasket in a curing box for curing. The temperature in the curing box is set at 15-40°C and the humidity is set at 30-80%. During this period, CO2 gas is introduced.

[0051] Step 8: After the curing is completed, the gasket is subjected to surface anti-sticking treatment and then packaged.

[0052] Embodiment 2:

[0053] The embodiment of the present application first discloses a PE film gasket with sealing ribs, including a gasket body, the gasket body having a main hole, a keyway hole, a bolt hole and a structural hole, the gasket body being made of polyethylene, the surface of the gasket body being coated with a coating layer of silicone material, the front side of the gasket body being fixedly connected with a first sealing rib around the edge of the main hole and the keyway hole, the first sealing ribs at at least one keyway hole and the edge of the main hole being fused and connected to each other, the front side of the gasket body being fixedly connected with a second sealing rib around the edge of the bolt hole, the gasket body being provided with reinforced glue points at the edge where the keyway holes and the structural holes are densely distributed, and the materials of the first sealing ribs, the second sealing ribs and the reinforced glue points are all made of silicone.

[0054] Preferably, the thickness of the gasket body is 0.5 mm, and the thickness of the coating layer is 0.1 mm.

[0055] Preferably, the thickness of the first sealing rib line is 1 mm, and the width of the first sealing rib line is 4 mm.

[0056] Preferably, the thickness of the second sealing rib line is 0.8 mm, and the width of the second sealing rib line is 2 mm.

[0057] Preferably, the thickness of the reinforced glue point is 0.8 mm, the width of the reinforced glue point is 2 mm, and the length is 40 mm.

[0058] This embodiment also discloses a method for manufacturing the above-mentioned PE film gasket with sealing ribs, comprising the following steps:

[0059] Step 1: Punching and cutting: Put the PE film sheet that meets the thickness requirements into the punching machine and punch out the gasket embryo;

[0060] Step 2: Surface cleaning: Use alcohol or ultrasound to clean the surface of the gasket embryo;

[0061] Step 3: Use a corona machine to perform corona treatment on the surface of the gasket embryo to improve surface adhesion;

[0062] Step 4: Use a roller coater to apply a layer of silicone film on the surface of the gasket blank;

[0063] Step 5: Use a silk screen printer to print the sealing ribs on the edges of the main hole, keyway hole and bolt hole on the front of the gasket;

[0064] Step 6: Use a glue dispenser to set a reinforced glue point on the front of the gasket at the edge where the key slot holes and structural holes are densely distributed;

[0065] Step 7: Place the gasket in a curing box for curing. The temperature in the curing box is set at 15-40°C and the humidity is set at 30-80%. During this period, CO2 gas is introduced.

[0066] Step 8: After the curing is completed, the gasket is treated with anti-sticking treatment on the surface and then packaged.

[0067] The implementation principle of the PE film gasket with sealing ribs and the production method thereof provided in the embodiment of the present application is as follows: the PE film gasket with sealing ribs and the production method thereof provided in the present application are used to replace conventional metal gaskets, asbestos-free fiber gaskets, rubber gaskets and other gaskets of the same type; mainly overcome and solve various deficiencies of other gaskets on the market;

[0068] 1. It is lighter than metal pads and has higher strength than traditional fiber pads and rubber pads;

[0069] 2. Raw materials are easily available in the market, have little impact on market supply, and are economically priced;

[0070] 3. Through the technical treatment of the surface silicone layer, the sealing performance indicators such as compression rebound rate can be designed and adjusted, reducing the technical development of the material itself;

[0071] 4. Its superior water resistance, high and low temperature resistance, acid and alkali resistance, and electrical properties also solve the technical performance defects of traditional gaskets. Since gaskets are usually used in closed parts of pipes and flange connections, their impact on aging problems caused by photooxidation is greatly reduced.

[0072] The above are all preferred embodiments of the present application, and the protection scope of the present application is not limited thereto. Therefore, any equivalent changes made according to the structure, shape, and principle of the present application should be included in the protection scope of the present application.

Claims

1. A PE film gasket with sealing ribs, characterized in that: The invention comprises a gasket body (1), wherein the gasket body (1) has a main hole (11), a key slot hole (12), a bolt hole (13) and a structural hole (14), the gasket body (1) is made of polyethylene, the surface of the gasket body (1) is coated with a coating layer (2) of a silicone material, the front side of the gasket body (1) is fixedly connected with a first sealing rib line (3) around the edge of the main hole (11) and the key slot hole (12), at least one of the first sealing rib lines (3) at the edge of the key slot hole (12) and the main hole (11) are fused and connected to each other, the front side of the gasket body (1) is fixedly connected with a second sealing rib line (4) around the edge of the bolt hole (13), and the gasket body (1) is provided with a strengthening glue point (5) at the edge where the key slot hole (12) and the structural hole (14) are more densely distributed, and the material of the first sealing rib line (3), the second sealing rib line (4) and the strengthening glue point (5) are all made of silicone.

2. The PE film gasket with sealing ribs according to claim 1, characterized in that: The thickness of the gasket body (1) is 0.2 to 0.5 mm, and the thickness of the coating layer (2) is 0.05 to 0.1 mm.

3. The PE film gasket with sealing ribs according to claim 2, characterized in that: The thickness of the first sealing rib line (3) is 0.5 to 1 mm, and the width of the first sealing rib line (3) is 2 to 4 mm.

4. The PE film gasket with sealing ribs according to claim 3, characterized in that: The thickness of the second sealing rib line (4) is 0.4 to 0.8 mm, and the width of the second sealing rib line (4) is 1 to 2 mm.

5. The PE film gasket with sealing ribs according to claim 4, characterized in that: The thickness of the reinforced glue point (5) is 0.4-0.8 mm, the width of the reinforced glue point (5) is 1-2 mm, and the length is 20-40 mm.

6. A method for producing the PE film gasket with sealing ribs as claimed in any one of claims 1 to 5, characterized in that: The following steps are involved: Step 1: Punching and cutting: Put the PE film sheet that meets the thickness requirements into the punching machine and punch out the gasket embryo; Step 2: Surface cleaning: Use alcohol or ultrasound to clean the surface of the gasket embryo; Step 3: Use a corona machine to perform corona treatment on the surface of the gasket embryo to improve surface adhesion; Step 4: Use a roller coater to apply a layer of silicone film on the surface of the gasket blank; Step 5: Use a silk screen printer to print the sealing ribs on the edges of the main hole, keyway hole and bolt hole on the front of the gasket; Step 6: Use a glue dispenser to set a reinforced glue point on the front of the gasket at the edge where the key slot holes and structural holes are densely distributed; Step 7: Place the gasket in a curing box for curing, during which CO2 gas is introduced; Step 8: After the curing is completed, the gasket is subjected to surface anti-sticking treatment and then packaged.

7. The method for producing a PE film gasket with sealing ribs according to claim 6, characterized in that: In step 7, the temperature in the curing box is set at 15-40° C. and the humidity is set at 30-80%.

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