JP2007170438A - Metal gasket - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a metal gasket capable for easily joining laminated bases, together, and reducing its size, weight and cost, and easy to disassemble after used. <P>SOLUTION: The metal gasket 1 comprises the laminated bases 2, 2 each formed of an elastic metal plate. Herein, a drilled portion 13 is provided passing through the laminated bases 2, 2, where the laminated bases 2, 2 are integrally formed using a resin. Preferably, the metal gasket 1 has the laminated bases 2, 2 integrally formed using a resin rivet 10 fitted to the drilled portion 13. <P>COPYRIGHT: (C)2007,JPO&INPIT

Description

  The present invention relates to a metal gasket, and more particularly to a metal gasket that can simplify the integration process of a metal gasket formed by laminating a plurality of substrates made of elastic metal plates.

  Conventionally, in a joint portion between a cylinder block and a cylinder head constituting an engine, a combustion chamber corresponding to the cylinder combustion chamber is formed on a substrate made of an elastic metal plate in order to improve the sealing performance of the joint surface between the cylinder block and the cylinder head. Laminating a plurality of substrates having inner beads surrounding the holes and forming outer peripheral beads surrounding the periphery of each hole such as a tightening bolt hole, an oil hole, and a cooling water hole arranged around the combustion chamber hole A metal gasket is used.

This metal gasket is laminated by laminating a plurality of substrates and sub-plates, and fixed by mechanical bonding methods such as punching, eyelet, claw hooking, folding at the end of the substrate, or caulking of metal rivets. A plurality of substrates are joined to form a metal gasket integrally (for example, Patent Document 1).
Japanese Patent Laid-Open No. 10-281290

  The above-mentioned method for fixing a laminated substrate requires complicated processing steps such as punching and caulking, forming a nail hook, folding and folding the end of the substrate, and punching when punching. There is a problem that it is easy to crack from the corner of the metal, causing gas leakage and overheating, and there is also a problem of electric corrosion when mechanically bonding between metals, and metal rivets are used during the caulking process because brass or copper is used. High temperature heating and large-capacity equipment are required, and the weight is further increased. For this reason, the conventional metal gasket has problems such as reduction in thickness and weight, processing cost, and difficulty in disassembling the gasket after use.

  In view of the above-described problems, the present invention provides a metal gasket that can be easily bonded to each other, can reduce the thickness and weight of the metal gasket, reduce processing costs, and can be easily disassembled after use. It is intended to provide.

  The metal gasket of the present invention surrounds an inner bead that surrounds the combustion chamber hole, and circulation holes such as a tightening bolt hole, an oil hole, and a cooling water hole that are disposed around the combustion chamber hole together with the inner bead. In a metal gasket formed by laminating a plurality of elastic metal plates provided with an outer peripheral bead, a perforated portion that penetrates the plurality of laminated substrates is provided, and the plurality of laminated substrates are integrally formed using a resin in the perforated portion. It is formed.

  The metal gasket of the present invention may be one in which the plurality of laminated substrates are integrally formed by resin rivets fitted to the perforated portions.

  In the present invention, a water-soluble resin can be used as the resin or resin rivet, and a color resin can also be used.

  According to the metal gasket of the present invention, by providing a perforated portion on a plurality of laminated substrates and using a resin in the perforated portion, and by fitting a resin rivet on the perforated portion, it is possible to perform punching, eyelet processing, etc. A plurality of laminated substrates can be integrated without using metal-to-metal mechanical coupling means.

  When resin rivets are used, it is possible to perform caulking at room temperature or caulking at a temperature that is about the softening point of the resin, reducing equipment size and saving labor, simplifying the bonding method and improving processing efficiency. Thus, the cost can be reduced, and the thickness of the metal gasket can be reduced by using flat head rivets. Furthermore, the metal gasket can be easily disassembled after use, which can contribute to resource recycling. Further, it is possible to reduce the weight of the metal rivet and prevent damage to other metal gaskets.

  Also, by using a water-soluble resin, the resin dissolves in engine cooling water while using the metal gasket, improving the recyclability, and using different color resins and rivets for each type of metal gasket. The metal gasket can be easily identified.

  Embodiments of the present invention will be described below with reference to the drawings.

  FIG. 1 is a plan view of a metal gasket 1 according to an embodiment of the present invention.

  The metal gasket 1 is provided with a combustion chamber hole 3 corresponding to a cylinder combustion chamber of an engine on a substrate 2 made of an elastic metal plate such as a stainless steel plate coated with a heat-resistant rubber or a resin containing molybdenum disulfide. A plurality of tightening bolt holes 4, a cooling water hole 5, and an oil hole 6 are formed around the combustion chamber hole 3.

  Around the combustion chamber hole 3, an inner bead 7 made of a full bead expanding toward the outside of the substrate 2 surrounds the combustion chamber hole 3, and seals the combustion chamber hole 3 to prevent gas leakage. It is formed so as to prevent cooling water from entering.

  A bead for sealing each of the tightening bolt hole 4, the cooling water hole 5, and the oil hole 6 is provided on the outer peripheral portion of the inner bead 7, and the outer peripheral bead is formed of a half bead that surrounds the inner bead 7 and bulges outward. 8 is provided between the outer peripheral edge of the substrate 2 and seals the inside of the metal gasket 1 to prevent leakage of cooling water and oil to the outside, and also prevents water and dust from entering from the outer periphery. ing.

  The metal gasket 1 of the embodiment is laminated by sandwiching an intermediate plate (not shown) between two substrates 2, 2, and as shown in the figure, two laminated substrates 2 at five locations on the peripheral edge of the substrate 2, 2 is provided, and a resin rivet 10 is fitted into the perforated part 13 so that the laminated substrate is integrally bonded to form the metal gasket 1.

  The resin rivet 10 can be obtained by molding a thermoplastic resin such as nylon, polypropylene, polystyrene, polyacetal, or polycarbonate by an injection molding method or the like.

  Bonding of laminates with the resin rivet 10 can be performed by caulking or bonding at room temperature with hollow rivets or conductive rivets, and even with conventional headed rivets, the temperature is about the softening point of the resin and is smaller than that of metal. Since caulking can be performed with caulking force, the production equipment can be reduced in size and labor can be saved, the processing can be simplified compared with the conventional joining method, the processing efficiency can be improved, and the cost of the metal gasket 1 can be reduced. Can be achieved.

  Further, by using flat head rivets, the metal gasket 1 can be thinned (see FIG. 2).

  Furthermore, in the metal gasket 1 using the resin rivet 10, since the rivet 10 can be easily separated from the metal gasket 1 when the metal gasket is disassembled after use, the metal gasket can be easily disassembled and parts can be easily separated. improves.

  Further, the weight of the metal rivet such as brass or copper can be reduced, and the head of the rivet can be prevented from coming into contact with other metal gaskets and being damaged when the metal gasket 1 is transported.

  As a material for the resin rivet 10, water-soluble resins such as polyvinyl alcohol, polyacrylamide, polyethylene oxide, polyvinyl pyrrolidone, and polyvinyl methyl ether can be used. Thus, the engine gasket can be used during the use of the metal gasket 1 in the water-cooled engine. Since the rivet is not dissolved by the cooling water, the metal gasket after use can be taken out from the engine in a disassembled state, and the recyclability is further improved.

  The resin rivet 10 may be a color rivet that contains various color pigments in a resin material and is colored, for example, white, black, red, yellow, blue, or green. This makes it possible to easily identify the metal gasket by using different color rivets for each type of metal gasket, and can be used, for example, to identify the tightening thickness rank of a diesel engine.

  As a resin rivet used in the metal gasket 1 of the present invention, a resin rivet 10 shown in FIG. 2 (a) is a normal flat head type rivet, and as shown in FIG. The metal gasket 1 is integrally formed by being inserted into the perforated portion 13 of the laminate sandwiching the intermediate plate 9 and formed by using a caulking device (not shown) for softening the caulking portion 10a. The

  A resin rivet 11 shown in FIG. 3 (a) is a hollow type rivet, and is inserted through a perforated portion 13 of a laminate in which an intermediate plate 9 is sandwiched between substrates 2 and 2 as shown in FIG. 2 (b). The caulking part 11a as shown in the figure is crimped and deformed by cold caulking at room temperature to caulk and deform the hollow part of the rivet as shown in FIG. The metal gasket 1 is formed and integrated.

  Further, the shape of the resin rivet used in the present invention, such as a combination of a resin washer and a resin rivet 14 in which a small-diameter caulking portion 14a is formed in advance as shown in FIG. It can be used without limitation without departing from the spirit of the invention.

  Furthermore, the metal gasket using the resin rivet of the present invention can be used for inventory management and production management of the metal gasket and engine by embedding an IC chip inside the resin rivet and recording the metal gasket information and engine information. .

  In the metal gasket 1 of the present invention, instead of the resin rivet described above, the molten resin is poured into the perforated portions 13 provided at the five peripheral portions of the substrates 2 and 2, or the softened resin is introduced to form the perforated portions 13. After embedding and curing, the metal gasket 1 may be formed by integrally bonding the two laminated substrates 2 and 2 together.

  As the resin in this case, similar to the resin rivet 10, the above-described thermoplastic resins such as nylon and polypropylene, water-soluble resins such as polyvinyl alcohol and polyacrylamide can be used, and a color resin may be used. .

  The metal gasket of the present invention can be used as a sealing gasket for various applications, and is particularly suitable for automobile engines such as an open deck structure, a semi-open deck structure, and a wet liner structure.

It is a top view of the metal gasket which concerns on embodiment. It is sectional drawing of a resin rivet and sectional drawing which shows a use condition. It is sectional drawing of another resin rivet, and sectional drawing which shows a use condition. It is sectional drawing which shows the example of another resin rivet.

Explanation of symbols

1 …… Metal gasket 2 …… Substrate 9 …… Intermediate plate 10 …… Resin rivet 13 …… Perforated part

Claims (4)

A plurality of inner beads that surround the combustion chamber holes, and outer peripheral beads that surround flow holes such as tightening bolt holes, oil holes, and cooling water holes disposed around the combustion chamber holes together with the inner beads. In a metal gasket formed by laminating a substrate made of an elastic metal plate,
A metal gasket, comprising a perforated portion penetrating a plurality of laminated substrates, wherein the plurality of laminated substrates are integrally formed using a resin in the perforated portion. The metal gasket according to claim 1, wherein the plurality of laminated substrates are integrally formed by a resin rivet fitted to the perforated part. The metal gasket according to claim 1 or 2, wherein a water-soluble resin is used. The metal gasket according to any one of claims 1 to 3, wherein the resin is a color resin.

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