JPS5756120A - Manufacture of composite tube - Google Patents

Manufacture of composite tube

Info

Publication number
JPS5756120A
JPS5756120A JP55129273A JP12927380A JPS5756120A JP S5756120 A JPS5756120 A JP S5756120A JP 55129273 A JP55129273 A JP 55129273A JP 12927380 A JP12927380 A JP 12927380A JP S5756120 A JPS5756120 A JP S5756120A
Authority
JP
Japan
Prior art keywords
rubber
pipe expanding
pipe
load
adjoining
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.)
Pending
Application number
JP55129273A
Other languages
Japanese (ja)
Inventor
Shigeo Tsuruoka
Hiromichi Imahashi
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 JP55129273A priority Critical patent/JPS5756120A/en
Publication of JPS5756120A publication Critical patent/JPS5756120A/en
Pending legal-status Critical Current

Links

Landscapes

  • Shaping Metal By Deep-Drawing, Or The Like (AREA)

Abstract

PURPOSE: To manufacture a composite tube with high productivity and to lengthen the life of pipe expanding medium rebber in rubber pipe expanding by squaring adjoining faces of the pipe expanding medium rubber and pipe expanding pressure seal rubber at no-load state.
CONSTITUTION: A pipe expanding medium rubber 3 having such a shape that the face adjoining to a pipe expanding seal rubber 4 squares without applying load is used. When a punch 5 is pressed by applying load, rubber 3 placed in an inner pipe 1 contracts and expands in the direction of diameter and expands the inner pipe 1 to make it adhere to and unite with an outer pipe 2. At this time, the rubber 3 works preferentially to expand adjoining rubber 4 at initial stage of load application. Accprdingly, the seal becomes perfect even at initial stage of load application, and flowing out of rubber 3 can be prevented. Conseqeutnly, failure in pipe expanding is eliminated and the rubber 3 restores smoothly to the original state as the load is released.
COPYRIGHT: (C)1982,JPO&Japio
JP55129273A 1980-09-19 1980-09-19 Manufacture of composite tube Pending JPS5756120A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP55129273A JPS5756120A (en) 1980-09-19 1980-09-19 Manufacture of composite tube

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP55129273A JPS5756120A (en) 1980-09-19 1980-09-19 Manufacture of composite tube

Publications (1)

Publication Number Publication Date
JPS5756120A true JPS5756120A (en) 1982-04-03

Family

ID=15005504

Family Applications (1)

Application Number Title Priority Date Filing Date
JP55129273A Pending JPS5756120A (en) 1980-09-19 1980-09-19 Manufacture of composite tube

Country Status (1)

Country Link
JP (1) JPS5756120A (en)

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