Mold of resin body and resin body

Patent metadata

Field	Value
Publication number	US-10926442-B2
Application number	US-201916255939-A
Country	US
Kind code	B2
Filing date	Jan 24, 2019
Priority date	Mar 15, 2018
Publication date	Feb 23, 2021
Grant date	Feb 23, 2021

Abstract

The present disclosure provides a mold of a resin body capable of reducing the cost of manufacturing a resin body including a resin base material and a foamed resin part provided on the resin base material. This mold is a mold of a resin body including resin base material molding die parts for molding a resin base material. The mold includes: a sliding part capable of sliding inside a foamed resin part molding cavity that communicates with a resin base material molding cavity of the resin base material molding die parts. The sliding part is swingably floated in a direction perpendicular to a sliding surface on which the sliding part slides. In the process of molding the resin base material, the sliding part blocks an opening part that communicates from the resin base material molding cavity to the foamed resin part molding cavity.

First claim

What is claimed is:

1. A mold of a resin body including a resin base material molding die part for molding a resin base material, the mold of the resin body comprising:
a sliding part capable of sliding inside a foamed resin part molding cavity that communicates with a resin base material molding cavity of the resin base material molding die part, wherein
the sliding part includes a core, a core holder, and a stopping plate, the core comprising a plurality of divided cores, each of the divided cores including a base part and a plate part that is extended from the base part, a cross-sectional area of the base part being larger than a cross-sectional area of the plate part,
the core holder includes a hole that holds the plurality of divided cores, the plate parts of the plurality of divided cores protruding through the hole of the core holder,
the stopping plate is fitted into a side opposite to the hole of the core holder in the core holder so as to abut the base parts of the plurality of divided cores,
a distance between an inner wall surface of a sliding part holding hole of the resin base material molding die part and the plate part of one of the plurality of divided cores is less than a distance between an inner wall surface of the hole of the core holder and the plate part of the one of the plurality of divided cores such that the sliding part is swingably floated in a direction perpendicular to a sliding surface on which the sliding part slides,
in the process of molding the resin base material, the sliding part blocks an opening part that communicates from the resin base material molding cavity to the foamed resin part molding cavity, and
in the process of molding the foamed resin part, after a foamed resin material is filled into the foamed resin part molding cavity, the sliding part is separated from the resin base material molding cavity, thereby increasing a filling space that can be filled with the foamed resin material.

2. The mold of the resin body according to claim 1 , wherein a recessed part is provided on a distal end surface of the sliding part on a side of the resin base material molding cavity.

3. The mold of the resin body according to claim 1 , wherein the core holder is thicker than the core.

Assignees

• Toyota Motor Co Ltd
• Toyota Boshoku Kk

Inventors

• Miyagawa Yoichi
• Ogawa Tetsuharu

Classifications

• B29C44/58

  Moulds · CPC title

• B32B7/02

  Physical, chemical or physicochemical properties · CPC title

• B32B25/08

  of synthetic resin · CPC title

• B32B2250/02

  2 layers · CPC title

• B29C44/083

  Increasing the size of the cavity after a first part has foamed, e.g. substituting one mould part with another · CPC title