Patent ID: 7824587
Filing Date: 2010-11-02
Classification: B60R,G10K

Abstract:
1. A method for manufacturing an interior material of an operator's cab for a work machine, the interior material comprising at least a structure member and a noise absorption layer disposed on an outside surface of the structure member, wherein the structure member has a rib which stands from an inside surface of a base portion thereof and comes into intimate contact with an inside surface of an exterior material, and a hermetically sealed hollow portion is formed by the rib in intimate contact with the exterior material, the method comprising: forming the structure member having at least one rib in a desired shape by an injection-molding method; forming at least one hole portion in the structure member, the hole portion passing through the base portion from an outside surface thereof to the inside surface thereof when or after the structure member is molded; attaching the structure member in which the hole portion has been formed to a mold; and molding a noise absorption layer on the outside surface of the structure member using the mold by injecting a material constituting the noise absorption layer onto the outside surface of the structure member, and at the same time, forming the noise absorption layer on the inside surface of the structure member and on a part of a surface or an entire surface of the rib through the hole portion.