Fusion-bonded processed product of resin member, method for producing same and method for fusion-bonding resin members

• US 7,338,085 B2
• Filed: 07/13/2004
• Issued: 03/04/2008
• Est. Priority Date: 01/17/2002
• Status: Expired due to Fees

• Current Assignee: Naoki Toriyabe, Tatsuya Kyotani
• Original Assignee: Naoki Toriyabe, Tatsuya Kyotani
• Inventors: Kyotani, Tatsuya, Toriyabe, Naoki
• Primary Examiner(s): DUNWOODY, AARON M
• Application Number:
  US10/889,057
• Publication Number:
  US 20040239104A1
• Time in Patent Office: 1,330 Days
• Field of Search: 285/21.1, 285/21.2, 285/285.1, 219/535, 156/273.9
• US Class Current: 285/21.2
• CPC Class Codes: B29C 65/344 being a woven or non-woven fabric or being a mesh
• CPC Class Codes: B29C 65/3468 characterised by the means for supplying heat to said heated elements which remain in the join, e.g. special electrical connectors of windings B29C65/3668 takes precedence
• CPC Class Codes: B29C 65/3476 being metallic
• CPC Class Codes: B29C 65/8207 by mechanical methods
• CPC Class Codes: B29C 65/8215 Tensile tests
• CPC Class Codes: B29C 65/8246 Pressure tests, e.g. hydrostatic pressure tests
• CPC Class Codes: B29C 66/1122 Single lap to lap joints, i.e. overlap joints B29C66/45, B29C66/472, B29C66/52272 take precedence
• CPC Class Codes: B29C 66/1142 Single butt to butt joints
• CPC Class Codes: B29C 66/3452 Making complete joints by combining partial joints
• CPC Class Codes: B29C 66/5221 for forming coaxial connections, i.e. the tubular articles to be joined forming a zero angle relative to each other
• CPC Class Codes: B29C 66/52298 said socket being composed by several elements
• CPC Class Codes: B29C 66/71 characterised by the composition of the plastics material of the parts to be joined welding bar compositions B29C65/125
• CPC Class Codes: B29K 2023/00 Use of polyalkenes or derivatives thereof as moulding material
• CPC Class Codes: B29K 2023/06 PE, i.e. polyethylene
• CPC Class Codes: B29K 2023/12 PP, i.e. polypropylene
• CPC Class Codes: B29K 2025/06 PS, i.e. polystyrene
• CPC Class Codes: B29K 2027/06 PVC, i.e. polyvinylchloride
• CPC Class Codes: B29K 2033/12 Polymers of methacrylic acid esters, e.g. PMMA, i.e. polymethylmethacrylate
• CPC Class Codes: B29K 2055/02 ABS polymers, i.e. acrylonitrile-butadiene-styrene polymers
• CPC Class Codes: B29L 2023/22 Tubes or pipes, i.e. rigid bent tubes not for use as pipe couplings B29L2023/004
• CPC Class Codes: F16L 47/03 : Welded joints with an electrical resistance incorporated in the joint

Abstract

When resin members (3, 4) are fusion-bonded to each other by electric-conduction heating, a net-form or pattern-form metal wire (2) as a resistance heating element is disposed at a joint portion of the resin members (3, 4), and a metal wire (2) is heated by electric conduction for fusion-bonding the abutting resin members (3, 4) at temperatures sufficient for fusion-bonding with the resin members kept abutting against each other. A production method for a resin-processed product that can increase the strength of the joint portions between resin members, is free from carbon generation and short-circuiting during the electric conduction of a built-in resistance heating element (heating element), and is simple to produce while hardly being affected by environmental temperatures.

Claims

1. An apparatus for fusion-bonding a first cylindrical resin member and a second ring shaped or cylindrical resin member together through electric current-conduction-heating for jointing the members together, comprising:

a. means for interposing a meshed or mesh-patterned metal wire as a resistance heating element in a junction site between the first cylindrical resin member and the second ring shaped or cylindrical resin member so that the resistance heating element contacts joint surfaces of at least circular circumferential surfaces of said junction site, and abutting the resin members together to maintain the abutted state of the members; and

b. means for conducting electric current through said meshed or mesh-patterned metal wire to heat the metal wire to a temperature sufficient for both the resin members to fusedly fill mesh openings of said wire in gaps formed on the surfaces not in press-contact with said resistance heating element in said joint surfaces,

wherein a third ring shaped resin member having a divided form into 2 or more sections is disposed on the junction site, and wherein said resistance heating element is interposed on a corresponding joint surface of the divided section.

2. A resin processed product comprising

a resin processed component having a fusion-bonded layer, said fusion-bonded layer being interposed in an abutted junction area between a resin pipe and a resin component, formed by conducting electric current through a resistance heating element of metal wire having meshed or mesh-patterned openings, said fusion-bonded layer being formed through said openings between said resin pipe and said resin component,

a pipe to be connected to said resin pipe, said pipe to be connected having a stopper on an outer surface of an end thereof;

an O-ring disposed for contacting the outer surface of an end portion of the resin pipe and the inner surface of an end portion of said pipe to be connected; and

a sleeve for embracing the stopper on the outer surface of the end portion of the pipe to be connected.

3. The resin processed product as defined in claim 2 wherein said pipe to be connected is a metal pipe.

4. An apparatus for fusion-bonding resin members together though electric current-conduction-heating for jointing the members together, comprising:

means for interposing a resistance heating element between an abutted portion and a ring-shaped resin member, wherein the abutted portion is formed by abutting a first end of a first cylindrical resin member to a second end of a second cylindrical resin member, wherein the ring-shaped resin member is disposed on the abutted portion of external surfaces of the first end and the second end, wherein the resistance heating element is interposed between the abutted portion and the ring-shaped resin member, wherein the resistance heating element is made of a metal wire having meshed openings or mesh-patterned openings; and

means for applying electric current to the resistance heating element to fusion-bond the first and second cylindrical resin members with the ring-shaped resin member, to a temperature sufficient for both the first and second resin members to fusedly fill said mesh openings or mesh-patterned openings for fusion-bonding together in gaps formed on the surfaces not in press-contact with said resistance heating element in joint surfaces.

5. A method for producing a resin processed product by fusion-bonding and jointing a first cylindrical resin member and a second ring shaped or cylindrical resin member together by electric current conduction-heating, comprising

a. a step of abutting both said resin members together with interposition of a resistance heating element of metal wire, having meshed openings or mesh-patterned openings, in a junction site between the first cylindrical resin member and the second ring shaped or cylindrical resin member so that the resistance heating element contacts joint surfaces of at least circular circumferential surfaces of said junction site;

and

b. a step of conducting electric current through said resistance heating element for heating to fusion-bond said resin members together to a temperature sufficient for both the resin members to fusedly fill said openings for fusion-bonding together in gaps formed on the surfaces not in press-contact with said resistance heating element in said joint surfaces,

wherein a third ring shaped resin member having a divided form into 2 or more sections is disposed on the junction site, and wherein said resistance heating element is interposed on a corresponding joint surface of the divided section.

6. The method for producing the resin processed product as defined in claim 5, wherein said resistance heating element is interposed also in the division surfaces of the divided sections of said third ring shaped resin member, heated by current conduction to fusion-bond also the divided sections of the third resin member each other.

7. The method for producing the resin processed product as defined in claim 5 wherein said third resin member having a ring- or cylindrical shape has a slit through which said resistance heating element is interposed throughout said joint surface.

8. A method for producing a resin processed product by jointing pipes at least one of which is formed of resin, said method comprising:

a. a step of holding a resin component in a state of being abutted against an outer surface of one resin pipe at an end portion thereof, with a resistance heating element of metal wire, having meshed or mesh-patterned openings, being interposed at an abutted junction between said one resin pipe and said resin component;

b. a step of conducting electric current through said resistance heating element for generating heat for fusion-bonding said one resin pipe and said resin component together through said openings;

c. a step of providing a stopper on an outer surface of an end portion of a pipe to be jointed to said one resin pipe and providing an O-ring on an inner surface of the pipe to be jointed at an end portion thereof;

d. a step of holding said one resin pipe and said pipe to be jointed in a state in which said one resin pipe is abutted against said pipe to be jointed, so that said O-ring disposed on the inner surface of the end portion of the pipe to be jointed contacts an outer surface of said one resin pipe; and

e. a step of embracing, by a sleeve, said resin component, fusion-bonded to said one resin pipe, and said stopper on the outer surface of the end portion of said pipe to be jointed.

9. The method for producing a resin processed product as defined in claim 8 wherein said pipe to be jointed to said one resin pipe is a metal pipe.

10. A method for producing a resin processed product by fusion-bonding and jointing resin members together by electric current conduction-heating, comprising

abutting a first end of a first cylindrical resin member to a second end of a second cylindrical resin member, while disposing a ring-shaped resin member on an abutted portion of external surfaces of the first end and the second end, wherein a resistance heating element is interposed between the abutted portion and the ring-shaped resin member, wherein the resistance heating element is made of a metal wire having meshed openings or mesh-patterned openings;

and

applying electric current to the resistance heating element to fusion-bond the first and second cylindrical resin members with the ring-shaped resin member, to a temperature sufficient for both the first and second resin members to fusedly fill said mesh openings or mesh-patterned openings for fusion-bonding together in gaps formed on the surfaces not in press-contact with said resistance heating element in joint surfaces.