JPS5744430A - Manufacture of compound pipe - Google Patents

Manufacture of compound pipe

Info

Publication number
JPS5744430A
JPS5744430A JP11976680A JP11976680A JPS5744430A JP S5744430 A JPS5744430 A JP S5744430A JP 11976680 A JP11976680 A JP 11976680A JP 11976680 A JP11976680 A JP 11976680A JP S5744430 A JPS5744430 A JP S5744430A
Authority
JP
Japan
Prior art keywords
pipe
rubber products
elastomer
seal rubber
punch
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Granted
Application number
JP11976680A
Other languages
Japanese (ja)
Other versions
JPS6253247B2 (en
Inventor
Shigeo Tsuruoka
Hiromichi Imahashi
Hideaki Kanbara
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Hitachi Ltd
Original Assignee
Hitachi Ltd
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Hitachi Ltd filed Critical Hitachi Ltd
Priority to JP11976680A priority Critical patent/JPS5744430A/en
Publication of JPS5744430A publication Critical patent/JPS5744430A/en
Publication of JPS6253247B2 publication Critical patent/JPS6253247B2/ja
Granted legal-status Critical Current

Links

Landscapes

  • Shaping Of Tube Ends By Bending Or Straightening (AREA)
  • Rigid Pipes And Flexible Pipes (AREA)

Abstract

PURPOSE: To prevent plastic deforming of seals and to produce compound pipes with good productivity at the reduced relieving time of an expanding load, by axially pressing an elastomer inserted in the inner pipe via seal rubber products having a round corners at its pressure side to bring the inner pipe into close contact with the inside surface of the outer pipe.
CONSTITUTION: Seal rubber products of special shape, that is, seal rubber products 4 having circular or chamfered corners at its loaded side are prepared. Then a punch 5 is pushed by some load and an expanding medium rubber in an inner tube 1, that is, an elastomer 3 is axially compressed via the rubbers 4, and at the same time the tube 1 is expanded in a perpendicular direction to bring the outer surface of the pipe 1 into colse contact with the inside surface of an outer pipe 2, and the two pipe are joined together. When the pressure on the rubber products 4 is relieved by unloading of the punch 5, failures such as inroads to the wall of the inside of the pipe due to plastic deforming of the surface of rubber products 4 are prevented. Therefore the elastomer 3 is smoothly and normally restored to enable the easy and safe expansion of pipes in a short time.
COPYRIGHT: (C)1982,JPO&Japio
JP11976680A 1980-09-01 1980-09-01 Manufacture of compound pipe Granted JPS5744430A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP11976680A JPS5744430A (en) 1980-09-01 1980-09-01 Manufacture of compound pipe

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP11976680A JPS5744430A (en) 1980-09-01 1980-09-01 Manufacture of compound pipe

Publications (2)

Publication Number Publication Date
JPS5744430A true JPS5744430A (en) 1982-03-12
JPS6253247B2 JPS6253247B2 (en) 1987-11-10

Family

ID=14769651

Family Applications (1)

Application Number Title Priority Date Filing Date
JP11976680A Granted JPS5744430A (en) 1980-09-01 1980-09-01 Manufacture of compound pipe

Country Status (1)

Country Link
JP (1) JPS5744430A (en)

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS6487431A (en) * 1987-09-30 1989-03-31 Fujitsu Ltd Detecting mechanism for type of paper

Also Published As

Publication number Publication date
JPS6253247B2 (en) 1987-11-10

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