Method for molding composite materials

Patent metadata

Field	Value
Publication number	US-11045980-B2
Application number	US-201716494325-A
Country	US
Kind code	B2
Filing date	Apr 10, 2017
Priority date	Apr 10, 2017
Publication date	Jun 29, 2021
Grant date	Jun 29, 2021

Abstract

A molding method is provided for molding composite materials. The molding method molds a stack of composite materials formed by impregnating a base material with resin. The molding method includes providing a first resin with a photocuring property and providing a second resin with a thermosetting property. The first resin contained in a first composite material is cured by irradiating the first composite material with light, then the second resin is cured by heating the second resin contained in a second composite material. The curing of the first resin contained in the first composite material is completed before starting the curing of the second resin contained the second composite material that is adjacent to the first composite material of a surface layer.

First claim

The invention claimed is:

1. A molding method for molding a stack of composite materials formed by impregnating a base material with resin, the molding method comprising:
providing a surface layer that includes a first composite material comprising a first resin impregnated in a first base material, the first resin having a photocuring property;
providing a second layer adjacent to the surface layer that includes a second composite material comprising a second resin impregnated in a second base material, the second resin having a thermosetting property;
curing the first resin contained in the first composite material by irradiating the first composite material with light, then curing the second resin by heating the second resin contained in the second composite material; and
completing the curing of the first resin contained in the surface layer before starting the curing of the second resin contained in the second layer,
the surface layer being an outermost layer of the stack of composite materials that is exposed to an outside of the stack of composite materials during curing of the first resin contained in the first composite material.

2. The molding method according to claim 1 , wherein
the curing of the first resin comprises irradiating the first composite material with ultraviolet light.

3. The molding method according to claim 1 , wherein
at least one of the first base material and the second base material contains a plurality of carbon fibers that are oriented in one direction.

4. The molding method according to claim 1 , wherein
the stack of the composite materials is irradiated with light and shaped, and then thermoformed.

5. The molding method according claim 1 , further comprising
pressing a die corresponding to an outer shape of an article to be molded against the stack of the composite materials, wherein
the die transmits the light toward the stack of the composite materials.

6. The molding method according to claim 2 , wherein
at least one of the first base material and the second base material contains a plurality of carbon fibers that are oriented in one direction.

7. The molding method according to claim 2 , wherein
the stack of the composite materials is irradiated with light and shaped, and then thermoformed.

8. The molding method according to claim 3 , wherein
the stack of the composite materials is irradiated with light and shaped, and then thermoformed.

9. The molding method according claim 2 , further comprising
pressing a die corresponding to an outer shape of an article to be molded against the stack of the composite materials, wherein
the die transmits the light toward the stack of the composite materials.

10. The molding method according claim 3 , further comprising
pressing a die corresponding to an outer shape of an article to be molded against the stack of the composite materials, wherein
the die transmits the light toward the stack of the composite materials.

11. The molding method according claim 4 , further comprising
pressing a die corresponding to an outer shape of an article to be molded against the stack of the composite materials, wherein
the die transmits the light toward the stack of the composite materials.

Assignees

• Nissan Motor

Inventors

• Uehara Shigetaka

Classifications

• B29C35/0894 Primary

  provided with masks or diaphragms · CPC title

• B29C2793/0081

  before shaping · CPC title

• B29C70/20

  oriented in a single direction, e.g. roofing or other parallel fibres {(B29C70/083, B29C70/226 take precedence)} · CPC title

• B29C43/56

  Compression moulding under special conditions, e.g. vacuum · CPC title

• B29K2307/04

  Carbon · CPC title