# US 2009/0260703 A1 · Resin Pipe with Mouthpiece and Method of Manufacturing the Same

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- Number: US 2009/0260703 A1
- Document ID: US20090260703A1
- Status: Published application
- Kind: A1
- Application number: 12/413,006
- 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/US20090260703A1

## CPC

- F16L 25/0072: {Joints for pipes of dissimilar materials (joints between metal and plastic pipes F16L47/24)}
- B29C 33/52: soluble or fusible {(in particular used in injection moulding B29C45/4457)}
- B29C 39/10: incorporating preformed parts or layers, e.g. casting around inserts or for coating articles {(coating a surface by casting in general B05D1/30, B29C39/126 takes precedence)}
- B29C 65/64: Joining a non-plastics element to a plastics element, e.g. by force (B29C65/44 takes precedence)
- B29C 66/001: {Joining in special atmospheres}
- B29C 66/1122: {Single lap to lap joints, i.e. overlap joints (B29C66/45, B29C66/472, B29C66/52272 take precedence)}
- B29C 66/1142: {Single butt to butt joints}
- B29C 66/1222: {comprising at least a lapped joint-segment}
- B29C 66/1224: {comprising at least a butt joint-segment}
- B29C 66/5344: {said single elements being substantially annular, i.e. of finite length, e.g. joining flanges to tube ends (B29C66/5346 takes precedence)}
- B29C 66/721: {Fibre-reinforced materials (B29C66/729 takes precedence)}
- B29C 66/723: {being multi-layered (B29C66/7292, B29C66/72941 take precedence)}
- B29C 66/742: {to metals or their alloys}
- B29C 66/81261: {Thermal properties, e.g. thermal conductivity, thermal expansion coefficient}
- B29C 66/81455: {being a fluid inflatable bag or bladder, a diaphragm or a vacuum bag for applying isostatic pressure (inflatable element positioned between the joining tool and a backing-up part B29C66/82421)}
- B29C 66/82661: {by means of vacuum}
- B29D 23/001: {Pipes; Pipe joints (pleated hoses B29D23/18)}
- F16L 47/02: Welded joints; Adhesive joints
- F16L 47/06: with sleeve or socket formed by or in the pipe end
- F16L 47/24: for joints between metal and plastics pipes
- B29C 53/562: {spirally}
- B29C 66/71: {characterised by the composition of the plastics material of the parts to be joined (welding bar compositions B29C65/125)}
- B29C 66/7212: {characterised by the composition of the fibres}
- B29C 66/72321: {consisting of metals or their alloys}
- B29C 66/72341: {for gases}
- B29C 66/8122: {characterised by the composition of the material constituting the pressing elements, e.g. constituting the welding jaws or clamps}
- B29K 2101/12: Thermoplastic materials
- B29K 2105/0079: {Liquid crystals}
- B29K 2105/06: containing reinforcements, fillers or inserts
- B29K 2305/00: Use of metals, their alloys or their compounds, as reinforcement
- B29K 2307/00: Use of elements other than metals as reinforcement
- B29K 2995/0067: non-permeable
- B29L 2009/00: Layered products
- B29L 2031/3076: {Aircrafts (blades, propellers B29L2031/08)}
- F16L: PIPES; JOINTS OR FITTINGS FOR PIPES; SUPPORTS FOR PIPES, CABLES OR PROTECTIVE TUBING; MEANS FOR THERMAL INSULATION IN GENERAL
- 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 resin pipe with a mouthpiece comprising: a mouthpiece; and a resin pipe of which one end is joined to the mouthpiece, wherein the one end is disposed in the mouthpiece, and an outer peripheral surface of the one end is joined to an inner peripheral surface of the mouthpiece by fusion.

## Claims

### Claim 1

A resin pipe with a mouthpiece comprising: a mouthpiece; and a resin pipe of which one end is joined to the mouthpiece, wherein the one end is disposed in the mouthpiece, and an outer peripheral surface of the one end is joined to an inner peripheral surface of the mouthpiece by fusion.

### Claim 2 (depends on 1)

The resin pipe with a mouthpiece according to claim 1, wherein the resin pipe is made of a thermoplastic resin.

### Claim 3 (depends on 2)

The resin pipe with a mouthpiece according to claim 2, wherein the thermoplastic resin is a liquid crystal polymer.

### Claim 4 (depends on 1)

The resin pipe with a mouthpiece according to claim 1, further comprising: an outer pipe that is made of a fiber reinforced resin composite material, the outer pipe being formed on an outer peripheral surface of a portion of the resin pipe extending from the mouthpiece and an outer peripheral surface of an end of the mouthpiece from which the resin pipe extends.

### Claim 5 (depends on 1)

A method of manufacturing the resin pipe with a mouthpiece according to claim 1, the method comprising:
forming a resin pipe component of the resin pipe in a cylindrical shape by using a bar of which an coefficient of thermal expansion is larger than that of the mouthpiece;
disposing one end of the resin pipe component, which is formed in the cylindrical shape, in the mouthpiece and disposing the bar in the one end of the resin pipe component so that the resin pipe component, the mouthpiece, and the bar are substantially coaxially disposed; and
heating the resin pipe component, the mouthpiece, and the bar,
wherein external pressure generated by the mouthpiece and internal pressure generated by the bar are applied to the one end by the difference between coefficients of thermal expansion of the mouthpiece and the bar while the resin pipe component is melted by the heating, so that an outer peripheral surface of the one end is pressed against an inner peripheral surface of the mouthpiece, and the outer peripheral surface of the one end is joined to the inner peripheral surface of the mouthpiece by fusion welding.

### Claim 6 (depends on 5)

The method according to claim 5, wherein a sheet member, which is made of a resin material of the resin pipe, is wound around the bar desired times, is held in a cylindrical shape, and is heated.

### Claim 7 (depends on 6)

The method according to claim 6, wherein the sheet member is made of a liquid crystal polymer.

### Claim 8 (depends on 5)

The method according to claim 5, wherein an outer peripheral portion of the bar is made of a rubber material having heat resistance so as to withstand the heating.

### Claim 9 (depends on 8)

The method according to claim 8, wherein the resin pipe is made of a liquid crystal polymer, and the rubber material is made of silicon rubber.

### Claim 10 (depends on 5)

The method according to claim 5,
wherein the bar includes an inner bar and an outer peripheral member that is formed on an outer peripheral surface of the inner bar, and
the outer peripheral member is made of a material of which the coefficient of thermal expansion is larger than that of the inner bar.

### Claim 11 (depends on 10)

The method according to claim 10, wherein the outer peripheral member is made of a rubber material having heat resistance so as to withstand the heating, and the inner bar is made of metal.

### Claim 12 (depends on 11)

The method according to claim 11, wherein the resin pipe is made of a liquid crystal polymer, and the rubber material is made of silicon rubber.

### Claim 13 (depends on 5)

The method according to claim 5, wherein the heating is performed after an outer peripheral surface of a portion of the resin pipe component extending from the mouthpiece is covered over an end face of the mouthpiece by a female molding jig that has an inner peripheral surface corresponding to the outer peripheral surface of the resin pipe.

### Claim 14 (depends on 13)

The method according to claim 13, wherein the heating is performed while the mouthpiece is fixed to the female molding jig.

### Claim 15 (depends on 14)

The method according to claim 14, wherein after the heating, the bar is extracted from the resin pipe while the mouthpiece is fixed to the female molding jig.

### Claim 16 (depends on 13)

The method according to claim 13, wherein a heat-resistant tape withstanding the heating is wound around a portion from which the resin pipe extends or an end of the mouthpiece, the inner peripheral surface of the female molding jig is pressed against the heat-resistant tape so that a gap between the mouthpiece and the female molding jig is sealed, the heating is performed while the mouthpiece is fixed to the female molding jig, and the heat-resistant tape prevents the resin of the resin pipe component, which is melted during the heating, from flowing out.

### Claim 17 (depends on 1)

A method of manufacturing a resin pipe with a mouthpiece, the method comprising:
inserting an extension portion of a bar-shaped core, which extends from another resin pipe, into a portion of the resin pipe of the resin pipe with a mouthpiece according to claim 1, which extends from the mouthpiece; making an end face of the inserted end reach the inside of the mouthpiece, making an end face of the resin pipe come in contact with an end face of the another resin pipe; and performing heating after a connection portion between the resin pipes is covered with a resin material and a bar is disposed in the resin pipe disposed in the mouthpiece, the bar being made of a material of which the coefficient of thermal expansion is larger than those of the mouthpiece and the core,
wherein external pressure generated by the mouthpiece and internal pressure generated by the bar are applied to the one end by the difference between coefficients of thermal expansion of the mouthpiece and the bar while the resin pipes and the resin material are melt by the heating, so that an outer peripheral surface of the one end is pressed against an inner peripheral surface of the mouthpiece, the resin pipe is joined to the another resin pipe by melting so that the resin pipes are integrated.

### Claim 18 (depends on 17)

The method according to claim 17, wherein the core is made of a water-soluble material, and the core is dissolved in water so as to be removed after the heating.

### Claim 19 (depends on 5)

The method according to claim 5, wherein the heating is performed by bagging the resin pipe or the resin pipe component, the mouthpiece, the bar, and a jig to be attached, and by heating and pressurizing the resin pipe or the resin pipe component, the mouthpiece, the bar, and the jig by using an autoclave.