Fiber reinforced composite member molding apparatus

Patent metadata

Field	Value
Publication number	US-11052574-B2
Application number	US-201816017234-A
Country	US
Kind code	B2
Filing date	Jun 25, 2018
Priority date	Jan 20, 2016
Publication date	Jul 6, 2021
Grant date	Jul 6, 2021

Abstract

A fiber reinforced composite member molding apparatus includes a pair of molds for clamping prepreg formed of long carbon fibers impregnated with resin, induction heating coils for heating thermoplastic resin contained in the prepreg via the molds, and cooling passages for cooling the resin via the molds after the resin is melted, wherein the molds each have a design surface brought into contact with the layered prereg, the design surface being divided into a plurality of regions, and a plurality of cells provided along the design surface to be open at the back of the design surface and individually correspond to the regions of the design surface, the induction heating coils are arranged in the cells, and the cooling passages are formed in each of the molds to run along the design surface.

First claim

The invention claimed is:

1. A fiber reinforced composite member molding apparatus for molding a fiber reinforced composite member from stacked sheets of prepreg formed of carbon fibers impregnated with resin, comprising:
a pair of molds provided to be brought nearer to or away from each other,
heat sources to heat the resin impregnated in each of the stacked sheets of prepreg via the pair of molds in a clamped and pressed state with the stacked sheets of prepreg clamped between the pair of molds, and
cooling passages to allow a cooling fluid to flow, thereby cooling the resin via the pair of molds after heating of the resin impregnated in each of the stacked sheets of prepreg, wherein
the pair of molds have each a design surface brought into contact with the stacked sheets of prepreg, the design surface being divided into a plurality of regions, and a plurality of cells provided along the design surface to be open at a back of the design surface, each of the plurality of cells individually corresponding to each of the plurality of regions of the design surface,
each of the heat sources is individually arranged in each of the plurality of cells,
the cooling passages are formed in each of the pair of molds to run along the design surface, and
the pair of molds each comprise a base mold component and a design mold component providing the design surface and detachably attached to the base mold component with a thermal insulator interposed therebetween, the design mold component of each of the pair of molds is formed by joining a plurality of design mold-constituting plates, arranged to abut each other in a position standing in a direction in which the molds are brought nearer to or away from each other, by diffusion bonding, and the plurality of design mold-constituting plates have cooling grooves provided such that the cooling grooves in adjacent design mold-constituting plates meet each other to form the cooling passages.

2. The fiber reinforced composite member molding apparatus according to claim 1 , wherein the base mold component and the design mold component of each of the pair of molds have approximating opposing surfaces formed to approximate the design surface, the approximating opposing surfaces of the base mold component and the design mold component each comprising a plurality of polygonal planes arranged around a point and abutting each other.

3. The fiber reinforced composite member molding apparatus according to claim 2 , wherein the base mold component and the design mold component are connected together by a connecting member running through the point.

4. The fiber reinforced composite member molding apparatus according to claim 3 , wherein the base mold component of one of the pair of molds has dovetail grooves and the base mold component of the other of the pair of molds has dovetail tenons, the dovetail grooves and the dovetail tenons engaging with each other in a clamped state of the pair of molds.

5. The fiber reinforced composite member molding apparatus according to claim 2 , wherein the base mold component of one of the pair of molds has dovetail grooves and the base mold component of the other of the pair of molds has dovetail tenons, the dovetail grooves and the dovetail tenons engaging with each other in a clamped state of the pair of molds.

6. The fiber reinforced composite member molding apparatus according to claim 1 , wherein the base mold component of one of the pair of molds has dovetail grooves and the base mold component of the other of the pair of molds has dovetail tenons, the dovetail grooves and the dovetail tenons engaging with each other in a clamped state of the pair of molds.

7. The fiber reinforced composite member molding apparatus according to claim 1 , wherein the base mold component and the design mold component of each of the pair of molds have approximating opposing surfaces each foiined to approximate the design surface, the approximating opposing surfaces of the base mold component and the design mold component each comprising a plurality of rectangular planes arranged to opposite sides of a centerline of thermal expansion in heating of the resin impregnated in each of the stacked sheets of prepreg and abutting each other.

Assignees

• Ihi Corp

Inventors

• Murakami Tsutomu
• Obuchi Kenro
• Tanaka Shinichi

Classifications

• B29C70/345

  using matched moulds · CPC title

• B29C43/52

  Heating or cooling · CPC title

• B29C43/36

  Moulds for making articles of definite length, i.e. discrete articles · CPC title

• B29C33/06 Primary

  using radiation {, e.g. electro-magnetic waves, induction heating} · CPC title

• B29C2033/023

  Thermal insulation of moulds or mould parts · CPC title