Method of producing gasket and gasket

Patent metadata

Field	Value
Publication number	US-9845877-B2
Application number	US-201514808491-A
Country	US
Kind code	B2
Filing date	Jul 24, 2015
Priority date	Jul 25, 2014
Publication date	Dec 19, 2017
Grant date	Dec 19, 2017

Abstract

A method of producing a gasket in which burrs can be prevented from being formed, and a mold failure can be suppressed, and a gasket are provided. A method of producing a gasket includes: a step S 1 of preparing a metal mesh member and expanded graphite; a step S 2 of placing the metal mesh member around the expanded graphite in a manner that a long belt-like composite body in which the expanded graphite is enveloped by the metal mesh member is formed; a step S 4 of adjusting the shapes of longitudinal end portions of the composite body in a manner that, in the short-side direction of the composite body, the width dimensions of the longitudinal end portions of the composite body are smaller than the width dimension of a longitudinal middle portion of the composite body; a step S 5 of spirally winding the composite body in a manner that a tubular body in a multiply wound state in which an axial direction coincides with the short-side direction of the composite body is formed; and a step S 6 of compress molding the tubular body in the axial direction of the tubular body.

First claim

The invention claimed is:

1. A method of producing a gasket configured by using a metal mesh member and expanded graphite, comprising the steps of:
preparing the metal mesh member and the expanded graphite;
placing the metal mesh member around the expanded graphite in a manner that a long belt-like composite body in which the expanded graphite is enveloped by the metal mesh member is formed;
adjusting shapes of longitudinal end portions of the composite body by partially notching each of the longitudinal end portions of the composite body such that, in a short-side direction of the composite body, width dimensions of the longitudinal end portions of the composite body are smaller than a width dimension of a longitudinal middle portion of the composite body;
subsequent to the step of adjusting the shapes of the longitudinal end portions of the composite body, spirally winding the composite body in a manner that a tubular body in a multiply wound state in which an axial direction coincides with the short-side direction of the composite body is formed; and
compress molding the tubular body in an axial direction of the tubular body.

2. The method of producing a gasket according to claim 1 , wherein the composite body is spirally wound in a manner that the width dimension in a radial direction of the tubular body is substantially constant over a whole circumference of the tubular body.

Assignees

• Nippon Pillar Packing

Inventors

• Tanabe Hiroki
• Yanagitake Yuji
• Sato Yuta

Classifications

• B32B37/10

  characterised by the pressing technique, e.g. using action of vacuum or fluid pressure · CPC title

• B32B37/144

  using layers with different mechanical or chemical conditions or properties, e.g. layers with different thermal shrinkage, layers under tension during bonding (constructional features for tensioning B32B38/1825) · CPC title

• F16J15/121

  with metal reinforcement · CPC title

• B32B2305/38

  Meshes, lattices or nets · CPC title

• F16J15/126 Primary

  consisting of additions, e.g. metallic fibres, metallic powders, randomly dispersed in the packing · CPC title