# US 2009/0260745 A1 · Method of Manufacturing Resin Pipe

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- Number: US 2009/0260745 A1
- Document ID: US20090260745A1
- Status: Published application
- Kind: A1
- Application number: 12/412,988
- Filed: 2009-03-27
- Published: 2009-10-22
- Earliest claimed: 2008-04-17
- Assignees: Fuji Jukogyo Kabushiki Kaisha; The Society of Japanese Aerospace Companies
- Inventors: Yuka Iwai; Yoji Arakawa; Yasunori Sugihara; Munehito Kawakami; Hiroyuki Nakamura
- Web page: https://patentgrep.com/patent/US20090260745A1

## CPC

- B29C 53/588: {having a non-linear axis, e.g. elbows, toroids}
- B29C 53/822: {Single use mandrels, e.g. destructible, becoming part of the wound articles (B29C53/825 takes precedence)}
- B29D 23/006: {Elbows}
- B29C 53/562: {spirally}
- B29C 61/006: {the force created by the liberation of the internal stresses being used for compression moulding or for pressing preformed material}
- B29K 2105/0079: {Liquid crystals}
- B29L 2031/243: {Elbows}
- 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)
- B29D: PRODUCING PARTICULAR ARTICLES FROM PLASTICS OR FROM SUBSTANCES IN A PLASTIC STATE (making granules B29B9/00; making preforms B29B11/00)
- B29K: INDEXING SCHEME ASSOCIATED WITH SUBCLASSES B29B, B29C OR B29D, RELATING TO MOULDING MATERIALS OR TO MATERIALS FOR {MOULDS, } REINFORCEMENTS, FILLERS OR PREFORMED PARTS, e.g. INSERTS
- B29L: INDEXING SCHEME ASSOCIATED WITH SUBCLASS B29C, RELATING TO PARTICULAR ARTICLES

## Abstract

Disclosed is a method for manufacturing a resin pipe, including: heating a sheet member after winding the sheet member around a bar desired multiple times and holding the sheet member, wherein the sheet member is melted and molded into a resin pipe by the heating, and the bar is removed from the resin pipe after the heating.

## Claims

### Claim 1

A method for manufacturing a resin pipe, comprising:
heating a sheet member after winding the sheet member around a bar desired multiple times and holding the sheet member,
wherein the sheet member is melted and molded into a resin pipe by the heating, and
the bar is removed from the resin pipe after the heating.

### Claim 2 (depends on 1)

The method according to claim 1, wherein the bar is made of a water-soluble material withstanding the heating, and the bar is dissolved in water so as to be removed from the resin pipe after the heating.

### Claim 3 (depends on 1)

The method according to claim 1,
wherein the heating is performed after the bar is made of a water-soluble material withstanding the heating so as to have a curved portion of which an axis is a curve and the sheet member is wound around the bar and held, and
the bar is dissolved in water so as to be removed from the resin pipe after the heating.

### Claim 4 (depends on 3)

The method according to claim 3, wherein the heating is performed after the sheet member is formed in an elongate shape in a winding direction and is spirally wound around the curved portion and held.

### Claim 5 (depends on 4)

The method according to claim 4, wherein the sheet member is held while being wound around the bar, by welding a wind start end and a wind finish end of the sheet member that is spirally wound.

### Claim 6 (depends on 3)

The method according to claim 3, wherein the heating is performed, after the heat-resistant film is wound on an outer peripheral surface of the sheet member that is held while being wound around the bar.

### Claim 7 (depends on 3)

The method according to claim 3, wherein the winding of the sheet member around the bar desired multiple times and the holding of the sheet member are performed two or more times.

### Claim 8 (depends on 6)

The method according to claim 6, wherein the new heat-resistant film is wound on the outer peripheral surface of the sheet member for each heating, and the heating is performed two or more times.

### Claim 9 (depends on 6)

The method according to claim 6, wherein the heating is performed, after the heat-resistant film is spirally wound on the outer peripheral surface of the sheet member on the curved portion and held while being tensed in the winding direction.

### Claim 10 (depends on 1)

The method according to claim 1, wherein an outer pipe made of a fiber reinforced resin composite material is molded on an outer peripheral surface of the resin pipe.

### Claim 11 (depends on 10)

The method according to claim 10, wherein the fiber reinforced resin composite material is hardened while the fiber reinforced resin composite material is tightened up by a heat-shrinkable tape, and molded into an outer pipe, by performing heating while the heat-shrinkable tape is wounded on an outer peripheral surface of the fiber reinforced resin composite material that is formed on the outer peripheral surface of the resin pipe.

### Claim 12 (depends on 11)

The method according to claim 11, wherein when the heat-shrinkable tape is wound on the outer peripheral surface of the fiber reinforced resin composite material, the heat-shrinkable tape is spirally wound on the outer peripheral surface of the sheet member on the curved portion and held while being tensed in the winding direction.