Fiber gasket with cross-section sealing and manufacturing method thereof

Abstract

The present invention provides a fiber gasket with cross-section sealing and a manufacturing method thereof, which can ensure the sealing of the gasket while reducing the usage of raw materials for the leakage blocking layer in the manufacturing process and reducing the cost of the fiber gasket; the silk screen printing method is used to improve the preparation efficiency of the fiber gasket, and the preparation method comprises the following steps: (1) preparing a coupling layer: stirring a first high molecular polymer evenly for standby use, and then using a first silk screen printing screen to silk screen the first high molecular polymer on the inner cross section and the outer cross section of the fiber gasket, the first high molecular polymer infiltrates into the interior of the fiber gasket, and high temperature vulcanization is performed to obtain a coupling layer; (2) preparing a functional layer: stirring a high molecular polymer with a good ratio evenly for standby use to form a second high molecular polymer, and then using a second silk screen printing screen to deposit the second high molecular polymer on the surface of the coupling layer by silk screen printing to form a functional layer, the surface of the functional layer is smooth, thereby finally forming a fiber gasket with cross-section sealing.

Description

Technical Field

[0001] The invention relates to the field of fiber gaskets, and in particular to a fiber gasket with cross-section sealing and a manufacturing method thereof. Background Art

[0002] In the prior art, application number: CN200820119216.X discloses a high-performance sealing gasket, which has a relatively wide coating on the edge between the face and the edge. The coating is wide enough to cover every corner of the edge and protrude vertically over the corner on at least one side of the gasket to one face of the gasket. The amount of outward protrusion of the coating enables the gasket to have an effective sealing ability, which is stronger than the sealing ability of a coating of a similar gasket that only extends from corner to corner without protruding outward.

[0003] The height of the high-performance sealing gasket in the prior art exceeds the height of the gasket itself, so that when the gasket is in use, the sealing between the upper and lower surface layers of the gasket and the corresponding parts of the gasket will be affected. In addition, during production, the prior art often adopts a molding vulcanization process, and the equipment used is expensive and inefficient, and more leakage blocking layer raw materials are used, which increases the cost of the gasket. Summary of the invention

[0004] The purpose of the present invention is to provide a fiber gasket with cross-section sealing and a method for making the same, which can reduce the amount of raw materials used in the leakage blocking layer during the production process and reduce the cost of making the fiber gasket; and use silk screen printing to improve the preparation efficiency of the fiber gasket; the produced fiber gasket can meet its sealing performance, prevent liquid media from leaking in the gasket, greatly improve the overall sealing performance of the existing gasket, reduce the three leakage phenomena of the engine, and improve the grade of the engine.

[0005] The embodiment of the present invention is achieved as follows:

[0006] A fiber gasket with cross-section sealing comprises an inner section and an outer section, both of which are provided with leakage blocking layers, the height of the leakage blocking layer is equal to the height of the fiber gasket, and the corners of the leakage blocking layer are arc-shaped.

[0007] In a preferred embodiment of the present invention, the leakage blocking layer includes a functional layer and a coupling layer, the functional layer is located outside the cross section of the fiber gasket, the coupling layer is located inside the cross section of the fiber gasket, and the functional layer and the coupling layer are connected.

[0008] In a preferred embodiment of the present invention, the leakage blocking layer is a high molecular polymer, and the high molecular polymer includes polyacrylic acid, polyacrylonitrile, polyvinylidene chloride, fluorosilicone polymer, polyurethane, nitrile rubber, fluoropolymer, hydrogenated NBR, silicone rubber, styrene-butadiene rubber, fluororubber polymer, fluorosilicone, acrylic acrylonitrile polymer, carboxylated nitrile polymer, carboxylated styrene-butadiene polymer, chloroprene rubber polymer, ethylene propylene rubber polymer, ethylene / vinyl acetate, and epoxy resin.

[0009] In a preferred embodiment of the present invention, the surface of the functional layer is smooth and the thickness of the functional layer is 0.1-0.4 mm.

[0010] In a preferred embodiment of the present invention, the coupling layer is rectangular and has a thickness of 0.2-1 mm.

[0011] A method for preparing a fiber gasket with cross-section sealing, the method comprising the following steps: (1) preparing a coupling layer: mixing a high molecular polymer with a good ratio and setting aside to form a first high molecular polymer, then using a first screen printing screen to screen print the first high molecular polymer on the inner and outer cross-sections of the fiber gasket, the first high molecular polymer infiltrates into the fiber gasket, filling the internal micro gaps at the cross-section of the fiber gasket, and finally obtaining a coupling layer by high-temperature vulcanization; (2) preparing a functional layer: mixing a high molecular polymer with a good ratio and setting aside to form a second high molecular polymer, then using a second screen printing screen to screen print the second high molecular polymer on the surface of the coupling layer to form a functional layer, the surface of the functional layer is smooth, thereby finally forming a fiber gasket with cross-section sealing.

[0012] In a preferred embodiment of the present invention, the first high molecular polymer is a high molecular polymer with good permeability and strong adhesion, and the stirring time of the first high molecular polymer is 2-5 hours.

[0013] In a preferred embodiment of the present invention, the vulcanization temperature of the first high molecular polymer is 200-300° C., the vulcanization time is 2-3 hours, and the thickness of the first high molecular polymer finally formed is 0.2-1 mm.

[0014] In a preferred embodiment of the present invention, the second high molecular polymer is a high molecular polymer resistant to sealing media, and the stirring time of the second high molecular polymer is 2-4 hours.

[0015] In a preferred embodiment of the present invention, the vulcanization temperature of the second high molecular polymer is 150-250° C., the vulcanization time is 1-2 hours, and the thickness of the second high molecular polymer finally formed is 0.1-0.4 mm.

[0016] The beneficial effects of the embodiments of the present invention are as follows: the fiber gasket in the present invention is manufactured by silk screen vulcanization, which has lower manufacturing cost and faster manufacturing time, and is suitable for mass production; during manufacturing, a coupling layer is first solidified on the fiber gasket to increase the sealing property of the fiber gasket; and the manufactured fiber gasket is provided with a leakage blocking layer on both the inner section and the outer section, the height of the leakage blocking layer does not exceed the height of the fiber gasket, and the surface of the leakage blocking layer is smooth and presents an arc shape, which is different from the fiber gasket in the prior art. When used, it can ensure the sealing effect of the sealing gasket while using less sealing material, thereby saving the cost of manufacturing the gasket. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings required for use in the embodiments are briefly introduced below. It should be understood that the following drawings only show certain embodiments of the present invention and therefore should not be regarded as limiting the scope. For ordinary technicians in this field, other related drawings can be obtained based on these drawings without creative work.

[0018] Figure 1 It is a schematic diagram of the gasket structure in the prior art;

[0019] Figure 2 Schematic diagram of the fiber gasket structure of an embodiment of the present invention Figure 1 ;

[0020] Figure 3 The structure of the fiber gasket at the cross section A of the embodiment of the present invention is shown in FIG. Figure 2 .

[0021] Icon: 001-opposite surface; 002-edge; 003-coating; 100-inner section; 200-outer section; 300-leakage blocking layer; 310-functional layer; 320-coupling layer. DETAILED DESCRIPTION

[0022] In order to make the purpose, technical solutions and advantages of the embodiments of the present invention clearer, the technical solutions in the embodiments of the present invention will be clearly and completely described below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are part of the embodiments of the present invention, not all of the embodiments. Generally, the components of the embodiments of the present invention described and shown in the drawings here can be arranged and designed in various different configurations.

[0023] Therefore, the following detailed description of the embodiments of the present invention provided in the accompanying drawings is not intended to limit the scope of the invention claimed for protection, but merely represents selected embodiments of the present invention. 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.

[0024] It should be noted that similar reference numerals and letters denote similar items in the following drawings, and therefore, once an item is defined in one drawing, further definition and explanation thereof is not required in subsequent drawings.

[0025] In the description of the present invention, it should be noted that the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inside", "outside", etc. indicate positions or positional relationships based on the positions or positional relationships shown in the accompanying drawings, or the positions or positional relationships in which the product of the invention is usually placed when in use. They are only for the convenience of describing the present invention 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 invention. In addition, the terms "first", "second", "third", etc. are only used to distinguish the description, and cannot be understood as indicating or implying relative importance.

[0026] In addition, the terms "horizontal", "vertical", "overhanging" and the like do not mean that the components are required to be absolutely horizontal or overhanging, but can be slightly tilted. For example, "horizontal" only means that its direction is more horizontal than "vertical", and does not mean that the structure must be completely horizontal, but can be slightly tilted.

[0027] In the description of the present invention, it is also necessary to explain that, unless otherwise clearly specified and limited, the terms "set", "install", "connect", and "connect" should be understood in a broad sense, for example, it 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 elements. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0028] First embodiment

[0029] See also Figure 1 In the prior art, the patent document with application number CN200820119216.X discloses a high-performance sealing gasket, i.e., a sealing gasket with two opposite faces 001 and one side 002, between which there is a relatively wide coating 003 on the side. The coating 003 is wide enough to cover every corner of the side and protrude vertically over the corner on at least one side of the gasket to one side of the gasket. The amount of outward protrusion of the coating 003 enables the gasket to have an effective sealing ability, which is stronger than the sealing ability of a coating of a similar gasket that only extends from corner to corner without protruding outward.

[0030] The coating in the prior art is arranged on the edge, and its function is to prevent the rough surface at the connection between the sealing structure and the metal sheet from affecting the seal, and to prevent liquid from leaking from the connection. Although this sealing structure can prevent the liquid medium from leaking inside the gasket, since the coating 003 exceeds the height of the gasket body and also forms corners, when the gasket is in use, there is a certain gap between the gasket and the adjacent parts of the gasket, thereby destroying the sealing between the gasket and the adjacent parts of the gasket.

[0031] Therefore, see Figure 2 and Figure 3 This embodiment provides a fiber gasket with cross-section sealing, which includes an inner cross-section 100 and an outer cross-section 200, and a leakage blocking layer 300 is provided on the inner cross-section 100 and the outer cross-section 200. The height of the leakage blocking layer 300 is equal to the height of the fiber gasket, and the corners of the leakage blocking layer 300 are arc-shaped.

[0032] The leakage blocking layer is a high molecular polymer, and the high molecular polymer includes polyacrylic acid, polyacrylonitrile, polyvinylidene chloride, fluorosilicone polymer, polyurethane, nitrile rubber, fluoropolymer, hydrogenated NBR, silicone rubber, styrene-butadiene rubber, fluororubber polymer, fluorosilicone, acrylic acrylonitrile polymer, carboxylated nitrile polymer, carboxylated styrene-butadiene polymer, chloroprene rubber polymer, ethylene-propylene rubber polymer, ethylene / vinyl acetate, and epoxy resin.

[0033] The leakage blocking layer 300 in this embodiment includes a functional layer 310 and a coupling layer 320 . The functional layer 310 is located outside the cross section of the fiber gasket, and the coupling layer 320 is located inside the cross section of the fiber gasket. The functional layer 310 and the coupling layer 320 are connected.

[0034] In this embodiment, the functional layer 310, the coupling layer 320 and the fiber gasket are aligned in height, the surface of the functional layer 310 is smooth, and the thickness of the functional layer 310 is 0.1-0.4 mm; the coupling layer 320 is rectangular, and the thickness of the coupling layer 320 is 0.2-1 mm.

[0035] The present embodiment also provides a method for preparing a fiber gasket with cross-section sealing, the preparation method comprising the following steps: (1) preparing a coupling layer 320: stirring a polymer with a good ratio and setting aside to form a first polymer, then using a first screen printing screen to screen print the first polymer onto the inner section 100 and the outer section 200 of the fiber gasket, the first polymer penetrates into the fiber gasket, fills the internal micro gaps at the cross section of the fiber gasket, and finally obtains the coupling layer 320 by high-temperature vulcanization; (2) preparing a functional layer 310: stirring a polymer with a good ratio and setting aside to form a second polymer, then using a second screen printing screen to screen print the second polymer onto the surface of the coupling layer 320 to form a functional layer 310, the surface of the functional layer 310 is smooth, thereby finally forming a fiber gasket with cross-section sealing.

[0036] In this embodiment, a hollow pattern having the same shape as the inner section 100 and the outer section 200 of the fiber gasket is arranged on the first screen printing screen, and the screen thickness of the first screen printing screen is 0.2-1 mm.

[0037] In this embodiment, a hollow pattern having the same shape as the functional layer 310 is arranged on the second silk-screen screen, and the thickness of the second silk-screen screen is 0.1-0.4 mm.

[0038] In a preferred embodiment of the present invention, the first high molecular polymer is a high molecular polymer with good permeability and strong adhesion, and the stirring time of the first high molecular polymer is 2-5 hours.

[0039] In a preferred embodiment of the present invention, the vulcanization temperature of the first high molecular polymer is 200-300° C., the vulcanization time is 2-3 hours, and the thickness of the first high molecular polymer finally formed is 0.2-1 mm.

[0040] In a preferred embodiment of the present invention, the second high molecular polymer is a high molecular polymer resistant to sealing media, and the stirring time of the second high molecular polymer is 2-4 hours.

[0041] In a preferred embodiment of the present invention, the vulcanization temperature of the second high molecular polymer is 150-250° C., the vulcanization time is 1-2 hours, and the thickness of the second high molecular polymer finally formed is 0.1-0.4 mm.

[0042] To sum up, the fiber gasket in the present invention is made by silk screen vulcanization, which has lower production cost and faster production time, and is suitable for mass production. During production, a coupling layer 320 is first cured on the fiber gasket to increase the sealing property of the fiber gasket. The prepared fiber gasket has a leakage blocking layer 300 on both the inner section 100 and the outer section 200. The height of the leakage blocking layer 300 does not exceed the height of the fiber gasket, and the surface of the leakage blocking layer 300 is smooth and presents an arc shape. Different from the fiber gasket in the prior art, it can ensure the sealing effect of the sealing gasket when used, while using less sealing material, saving the cost of making the gasket.

[0043] This specification describes examples of embodiments of the present invention, and it is not intended that these embodiments illustrate and describe all possible forms of the present invention. It should be understood that the embodiments in the specification can be implemented in a variety of alternative forms. The drawings need not be drawn to scale; some features can be enlarged or reduced to show the details of specific components. The specific structural and functional details disclosed should not be interpreted as limiting, but are merely representative bases for teaching those skilled in the art to implement the present invention in various forms. It should be understood by those skilled in the art that the multiple features illustrated and described with reference to any of the figures can be combined with the features illustrated in one or more other figures to form embodiments that are not explicitly illustrated or described. The illustrated combined features provide representative embodiments for typical applications. However, various combinations and variations of features consistent with the teachings of the present invention can be used for specific applications or implementations as needed.

[0044] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. For those skilled in the art, the present invention may have various modifications and variations. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present invention shall be included in the protection scope of the present invention.

Claims

1. A fiber gasket with cross-section sealing, the fiber gasket comprising an inner cross-section and an outer cross-section, characterized in that: The inner section and the outer section are both provided with a leakage blocking layer, the height of the leakage blocking layer is equal to the height of the fiber gasket, and the corners of the leakage blocking layer are arc-shaped; the leakage blocking layer includes a functional layer and a coupling layer, the functional layer is located outside the cross section of the fiber gasket, the coupling layer is located inside the cross section of the fiber gasket, and the functional layer and the coupling layer are connected; the method for preparing the coupling layer comprises: stirring a high molecular polymer with a good ratio evenly for standby use to form a first high molecular polymer, and then using a first screen printing screen to screen print the first high molecular polymer on the inner section and the outer section of the fiber gasket, the first high molecular polymer infiltrates into the interior of the fiber gasket, fills the internal micro gaps at the cross section of the fiber gasket, and finally obtains the coupling layer by high temperature vulcanization; The leakage blocking layer is a high molecular polymer, and the high molecular polymer includes polyacrylic acid, polyacrylonitrile, polyvinylidene chloride, fluorosilicone polymer, polyurethane, nitrile rubber, fluoropolymer, hydrogenated NBR, silicone rubber, styrene-butadiene rubber, fluororubber polymer, fluorosilicone, acrylic acrylonitrile polymer, carboxylated nitrile polymer, carboxylated styrene-butadiene polymer, chloroprene rubber polymer, ethylene propylene rubber polymer, ethylene / vinyl acetate, and epoxy resin; The surface of the functional layer is smooth, and the thickness of the functional layer is 0.1-0.4 mm; The coupling layer is rectangular, and the thickness of the coupling layer is 0.2-1 mm; The preparation method of the fiber gasket includes the following steps: (1) preparing a coupling layer: stirring a high molecular polymer with a good ratio and setting it aside to form a first high molecular polymer, and then using a first screen printing screen to screen print the first high molecular polymer on the inner section and outer section of the fiber gasket, so that the first high molecular polymer penetrates into the interior of the fiber gasket and fills the internal micro gaps at the cross section of the fiber gasket, and finally the coupling layer is prepared by high temperature vulcanization; (2) preparing a functional layer: stirring a high molecular polymer with a good ratio and setting it aside to form a second high molecular polymer, and then using a second screen printing screen to screen print the second high molecular polymer on the surface of the coupling layer to form the functional layer, the surface of the functional layer is smooth, so as to finally form the fiber gasket with cross-section sealing; The first high molecular polymer is a high molecular polymer with good permeability and strong adhesion, and the stirring time of the first high molecular polymer is 2-5 hours; The vulcanization temperature of the first high molecular polymer is 200-300° C., the vulcanization time is 2-3 hours, and the thickness of the first high molecular polymer finally formed is 0.2-1 mm; The second high molecular polymer is a high molecular polymer resistant to sealing media, and the stirring time of the second high molecular polymer is 2-4 hours; The vulcanization temperature of the second high molecular polymer is 150-250° C., the vulcanization time is 1-2 hours, and the thickness of the second high molecular polymer finally formed is 0.1-0.4 mm.

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