Composite material molding method and composite material molding device

Patent metadata

Field	Value
Publication number	US-12059852-B2
Application number	US-201917598559-A
Country	US
Kind code	B2
Filing date	Jun 6, 2019
Priority date	Jun 6, 2019
Publication date	Aug 13, 2024
Grant date	Aug 13, 2024

Abstract

A composite material molding method includes a first disposition step for disposing a prepreg on a jig molding surface of a molding jig; a first sealing step for airtightly sealing the prepreg by covering the prepreg with a first resin bag; a second disposition step for disposing a breather so as to cover the first resin bag; a second sealing step for airtightly sealing the breather so as to cover the breather with a second resin bag; a first depressurization step for depressurizing a first space sealed by the first resin bag; a second depressurization step for depressurizing a second space sealed by the second resin bag; and a heat-curing step for heat-curing the prepreg by supplying the internal space of a pressure vessel with a steam with a predetermined temperature and a predetermined pressure.

First claim

The invention claimed is:

1. A composite material molding method of molding a composite material, the method comprising:
a first disposing step of disposing the composite material on a jig molding surface of a molding jig provided in an internal space of an enclosable pressure vessel;
a first sealing step of airtightly sealing the composite material by covering the composite material with a first resin bag and adhering the first resin bag and the jig molding surface to each other with a sealant;
a second disposing step of disposing a ventilation member for securing a ventilation space such that the first resin bag is covered;
a second sealing step of airtightly sealing the ventilation member by covering the ventilation member with a second resin bag and adhering the second resin bag and the jig molding surface to each other with the sealant;
a first depressurizing step of depressurizing a first space sealed with the first resin bag;
a second depressurizing step of depressurizing a second space sealed with the second resin bag; and
a heat-curing step of heat-curing the composite material by supplying steam with a predetermined temperature and a predetermined pressure to the internal space of the pressure vessel in a state where the pressure vessel is enclosed,
wherein the second resin bag is a bag of which a main component is a fluororesin material, and
the first resin bag is a bag of which a main component is a resin material having higher adhering strength to the sealant than the fluororesin material.

2. The composite material molding method according to claim 1 ,
wherein the first resin bag is formed of a resin film of which a main component is nylon or polyurethane.

3. The composite material molding method according to claim 1 , further comprising:
a third disposing step of disposing the ventilation member such that the second resin bag is covered;
a third sealing step of airtightly sealing the ventilation member by covering the ventilation member, which covers the second resin bag, with a third resin bag and adhering the third resin bag and the jig molding surface to each other with the sealant; and
a third depressurizing step of depressurizing a third space sealed with the third resin bag,
wherein the third resin bag is formed of a material of which a main component is fluororubber or silicone rubber.

4. A composite material molding method of molding a composite material, the method comprising:
a first disposing step of disposing the composite material on a jig molding surface of a molding jig provided in an internal space of an enclosable pressure vessel;
a first sealing step of airtightly sealing the composite material by covering the composite material with a first resin bag and adhering the first resin bag and the jig molding surface to each other with a sealant;
a second disposing step of disposing a ventilation member for securing a ventilation space such that the first resin bag is covered;
a second sealing step of airtightly sealing the ventilation member by covering the ventilation member with a second resin bag and adhering the second resin bag and the jig molding surface to each other with the sealant;
a first depressurizing step of depressurizing a first space sealed with the first resin bag;
a second depressurizing step of depressurizing a second space sealed with the second resin bag;
a heat-curing step of heat-curing the composite material by supplying steam with a predetermined temperature and a predetermined pressure to the internal space of the pressure vessel in a state where the pressure vessel is enclosed;
an enclosing step of forming an enclosed space by covering the second resin bag with a third resin bag and adhering the third resin bag and the jig molding surface to each other with the sealant; and
a filling step of filling the enclosed space with a liquid for preventing the steam from coming into contact with the second resin bag,
wherein the third resin bag is formed of a material of which a main component is fluororubber or silicone rubber.

5. The composite material molding method according to claim 1 ,
wherein the composite material is a laminate in which a fiber preform is laminated together with a resin material.

6. A composite material molding device that molds a composite material, the device comprising:
an enclosable pressure vessel;
a molding jig that is provided in an internal space of the pressure vessel and has a jig molding surface for disposing the composite material;
a first resin bag that airtightly seals the composite material by covering the composite material and being adhered to the jig molding surface with a sealant;
a ventilation member that is disposed to cover the first resin bag and is used for securing a ventilation space;
a second resin bag that airtightly seals the ventilation member by covering the ventilation member and being adhered to the jig molding surface with the sealant;
a depressurizing unit that depressurizes a first space sealed with the first resin bag and a second space sealed with the second resin bag; and
a steam supply unit that supplies steam with a predetermined temperature and a predetermined pressure to the internal space of the pressure vessel in a state where the pressure vessel is enclosed and heat-cures the composite material,
wherein the second resin bag is a bag of which a main component is a fluororesin material, and
the first resin bag is a bag of which a main component is a resin material having higher adhering strength to the sealant than the fluororesin material.

Assignees

• Mitsubishi Heavy Ind Ltd

Inventors

• Yui Yuichi
• Okuda Akihisa
• Shimizu Masahiko
• Kani Yuki
• TERASAKA Akihiro

Classifications

• B29C70/544

  Details of vacuum bags, e.g. materials or shape · CPC title

• B29C43/12

  using bags surrounding the moulding material {or using membranes contacting the moulding material} · CPC title

• B29C70/44 Primary

  using isostatic pressure, e.g. pressure difference-moulding, vacuum bag-moulding, autoclave-moulding or expanding rubber-moulding · CPC title