JP-7854708-B2 - Gasket manufacturing method

JP7854708B2JP 7854708 B2JP7854708 B2JP 7854708B2JP-7854708-B2

Inventors

岡浩史
岡敬二郎

Assignees

岡安ゴム株式会社

Dates

Publication Date: 20260507
Application Date: 20220523

Claims (3)

A method for manufacturing an annular packing having at least two plate-shaped first core material and plate-shaped second core material, and a first covering made of rubber or resin that covers the first core material and the second core material, The packing is formed by connecting the first core material and the second core material to form a connecting portion, and the connecting portion is covered with a second covering made of rubber or resin. The width of the first core material and the width of the second core material are the same. The width of the first coating and the width of the second coating are the same. The widths of the first covering and the second covering are smaller than the widths of the first core material and the second core material. The first covering and the second covering are positioned in the center of the first core material and the second core material in the width direction, The first covering and the second covering protrude from the upper and lower sides of the first core material, and from the upper and lower sides of the second core material. A first elongated member is formed on the first core material, with the first covering covering the central part of the first core material in the width direction . A second elongated member is formed on the second core material, with the first covering covering the central part in the width direction of the second core material. At each end of the first long member and the second long member, the first covering is peeled off to expose the first core material and the second core material of a predetermined length. A connection is formed by joining one end of the protruding first core material and one end of the protruding second core material. A method for manufacturing a packing, wherein the second covering made of rubber or resin covers the connecting portion.
The method for manufacturing a packing according to claim 1, wherein the thickness of the first covering and the second covering is greater than the thickness of the first core material and the second core material.
The method for manufacturing a packing according to claim 2 , wherein the first coating and the second coating are made of the same material.

Description

This disclosure relates to gaskets used in automotive parts, various machine parts, building materials such as window frames, home appliances, and other gaskets. Conventionally, packings using core materials have been described in Patent Documents 1 and 2. The packing disclosed in Patent Document 1 is placed at the joint of a pipe. The packing described in Patent Document 1 has a first core material and a second core material, both of which are covered with rubber. The first core material and the second core material incorporated in the packing of Patent Document 1 are both molded in an annular shape to match the end face shape of the pipe that is the object in question. In other words, the core material used in the packing disclosed in Patent Document 1 is pre-formed into an annular shape and has no joints. The packing disclosed in Patent Document 2 is formed by extrusion molding to create a long piece of rubber having a wire in the center, cutting the long piece of rubber to size, and joining the ends with adhesive or the like to form a ring shape. The packing disclosed in Patent Document 2 has the rubber portions at both ends of a long piece of rubber cut to size bonded together with adhesive, but the core materials are not connected to each other. Japanese Patent Publication No. 2018-17330Japanese Patent Publication No. 2001-4031 This is a schematic perspective view of the electronic control unit to which the packing of Embodiment 1 is installed.Figure 1 is a schematic exploded perspective view of the electronic control unit.This is a schematic plan view of the inside of the main body of the electronic control unit shown in Figure 1, with the cover removed.The diagram shows the general structure of the packing in Embodiment 1, where (a) is a general plan view of the packing, and (b) is a cross-sectional view of (a) along A-A, which is the cross-sectional view of the elliptical region in Figure 4. (c) is a cross-sectional view of (a) along B-B.Figures (a) through (g) are perspective views listing the structure of the packing connection portion in Embodiment 1.(a) to (s) are cross-sectional views listing examples of the cross-sectional shapes of the packing in Embodiment 1.This is a schematic diagram of the main part of a component to which a packing is attached, according to Embodiment 2.Figure 7 is a plan view of the entire packing.This is a packing according to Embodiment 3, where (a) is a plan view thereof, (b) is a cross-sectional view of (a) along A-A, (c) is a partially enlarged view of (a), and (d) is a cross-sectional view of (c) along B-B.This is a schematic diagram showing the steps of the manufacturing method for the packing according to Embodiments 1 to 3.This is a schematic diagram showing the steps following Figure 10 in the method for manufacturing the packing according to Embodiments 1 to 3.(a) and (b) are schematic diagrams showing the molding process in the method for manufacturing packing according to Embodiments 1 to 3.This is a schematic diagram showing the second covering attachment step in a method for manufacturing a packing according to Embodiments 1 to 3. The following describes more specific embodiments of this disclosure. However, unnecessary details may be omitted. For example, detailed descriptions of already well-known matters or redundant descriptions of substantially identical configurations may be omitted. This is to avoid unnecessarily verbose descriptions and to facilitate understanding for those skilled in the art. The inventors provide the accompanying drawings and the following description to enable those skilled in the art to fully understand this disclosure, and do not intend to limit the subject matter described in the claims. In the following description, identical or similar components are denoted by the same reference numerals. One aspect of the present disclosure is a packing used in automotive parts, packing used in various machine parts, packing used in building materials such as window frames, packing used in home appliances and other products. Here, "packing" is a general term for a material placed between multiple components to prevent or restrict the passage of fluids such as gases, liquids, and powders. For example, if an internal space and an external space are separated by two partition walls, a packing is placed between these partition walls to seal the gap between them, preventing or restricting the movement of fluids such as gases, liquids, and powders from the internal space to the external space, or from the external space to the internal space. The packing may be stationary or it may be moving. Packing may also be called a gasket. (Embodiment 1) Hereinafter, as one aspect of this disclosure, a packing used in an electronic control unit (ECU) for controlling an automobile, which is an automobile component, will be described with reference to the drawings. Before explaining the structure of the gasket, we will first describe the electronic contro