# US 10,118,316 B2 · Mold

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- Number: US 10,118,316 B2
- Document ID: US10118316B2
- Status: Granted
- Kind: B2
- Application number: 15/870,598
- Filed: 2018-01-12
- Published: 2018-05-17
- Granted: 2018-11-06
- Earliest claimed: 2010-12-27
- Assignees: Kawasaki Jukogyo Kabushiki Kaisha
- Applicants: Kawasaki Jukogyo Kabushiki Kaisha
- Inventors: Toshikazu Sana
- Web page: https://patentgrep.com/patent/US10118316B2

## CPC

- B29C 33/42: characterised by the shape of the moulding surface, e.g. ribs or grooves
- B29C 33/3828: {Moulds made of at least two different materials having different thermal conductivities}
- B29C 70/42: for producing articles of definite length, i.e. discrete articles
- B29C 33/40: Plastics, e.g. foam or rubber
- B29C 33/48: with means for collapsing or disassembling
- B29L 2023/00: Tubular articles (B29L2024/00 takes precedence {; catheters B29L2031/7542})
- B29L 2031/3082: {Fuselages}
- Y10T 29/49718: Repairing
- Y10T 428/249921: Web or sheet containing structurally defined element or component
- B29C: SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING (making preforms B29B11/00; making laminated products by combining previously unconnected layers which become one product whose layers will remain together B32B37/00 - B32B41/00)
- B29L: INDEXING SCHEME ASSOCIATED WITH SUBCLASS B29C, RELATING TO PARTICULAR ARTICLES
- Y10T: TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION

## Abstract

A method of adjusting a coefficient of thermal expansion of a member made of a fiber-reinforced resin, the method including: adjusting a coefficient of thermal expansion in a predetermined direction by increasing or decreasing a quantity of fiber having a grain direction in agreement with the predetermined direction. Also disclosed is a mold (100) for curing a cylindrical laminate (30) obtained by laminating prepreg. The mold includes a core die (10) and a surface die (2) outside the laminate including a plurality of partial surface dies (21 to 27). The partial surface dies are arranged to cover the entire circumferential surface of the laminate. Each of the partial surface dies is made of a fiber-reinforced resin in which a quantity of fiber having a grain direction in agreement with the circumferential direction differs from a quantity of fiber having a grain direction in agreement with an axial direction.

## Claims

### Claim 1

A method of adjusting a coefficient of thermal expansion of a member made of a fiber-reinforced resin, the method comprising: adjusting a coefficient of thermal expansion in a predetermined direction by increasing or decreasing a quantity of fiber having a grain direction in agreement with the predetermined direction,
wherein the member is a plurality of partial surface dies which is included in a mold used when curing a cylindrical laminate obtained by laminating a prepreg, the mold comprising:
a core die made of an invar alloy and located inside the laminate; and
a surface die that is located outside the laminate and includes the plurality of partial surface dies,
wherein the partial surface dies are arranged in a circumferential direction of the laminate so as to cover an entire circumferential surface of the laminate,
wherein in the fiber-reinforced resin of each of the partial surface dies, a quantity of fiber having a grain direction in agreement with the circumferential direction differs from a quantity of fiber having a grain direction in agreement with an axial direction,
wherein each of the partial surface dies is formed by laminating a textile material containing carbon fiber and a unidirectional material containing the carbon fiber,
wherein a ratio of a quantity of (i) the carbon fiber having a grain direction in agreement with the axial direction within the textile material, (ii) the carbon fiber having a grain direction in agreement with the circumferential direction within the textile material, (iii) the carbon fiber having a grain direction in agreement with the circumferential direction within the unidirectional material and (iv) the carbon fiber having a grain direction in agreement with the axial direction within the unidirectional material is 1:1:2:0, and
wherein each of the partial surface dies is constructed such that a coefficient of thermal expansion in the circumferential direction is smaller than a coefficient of thermal expansion in the axial direction and more closely approximates a coefficient of thermal expansion of the core die than the coefficient of thermal expansion in the axial direction.

### Claim 2 (depends on 1)

A member that is made of a fiber-reinforced resin and which is adjusted through the method of adjusting a coefficient of thermal expansion according to claim 1.