JPS5582609A - Mold for pipe having deformed cross-section - Google Patents

Mold for pipe having deformed cross-section

Info

Publication number
JPS5582609A
JPS5582609A JP15638078A JP15638078A JPS5582609A JP S5582609 A JPS5582609 A JP S5582609A JP 15638078 A JP15638078 A JP 15638078A JP 15638078 A JP15638078 A JP 15638078A JP S5582609 A JPS5582609 A JP S5582609A
Authority
JP
Japan
Prior art keywords
pipe
section
mold
molded
untreated
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
JP15638078A
Other languages
Japanese (ja)
Inventor
Hiroshi Asao
Kenichi Okada
Shinobu Watanabe
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 JP15638078A priority Critical patent/JPS5582609A/en
Publication of JPS5582609A publication Critical patent/JPS5582609A/en
Pending legal-status Critical Current

Links

Landscapes

  • Shaping Of Tube Ends By Bending Or Straightening (AREA)

Abstract

PURPOSE: To enable a subject pipe to be molded with a low molding pressure applied and to reduce a process cost, by constituting molds such that an untreated pipe having a circular cross-section is molded monolithically by means of the upper and the lower molds to form a pipe having a deformed cross-section, and the upper mold is split at a portion whereat a portion having a small radius of curvature of the pipe having a deformed cross-section is molded.
CONSTITUTION: An untreated pipe 1 having a circular cross-section is placed between a lower mold 6 and an upper mold 4 comprising a split mold 4' whereat a portion having a small radius of curvature of a bent pipe with a deformed cross- section is molded, seal cylinders 2 being inserted into the ends of the pipe 1 to apply an internal pressure therein. The internal pressure of approximately 20kg/cm2 is then loaded to the untreated pipe 1 having a circular cross-section to prevent buckling, upper molds 4 and 4' being lowered monolithically to perform a bend- molding. Only the split mold 4' is then raised, the untreated pipe 1 being expanded with the internal pressure loaded. The internal pressure is reduced again to about 20kg/cm2, the split mold 4' being lowered to the original position. As a result of the bend-molding of the untreated pipe 1 being performed in the manner described above, a pipe having a desired deformed cross-section is formed.
COPYRIGHT: (C)1980,JPO&Japio
JP15638078A 1978-12-20 1978-12-20 Mold for pipe having deformed cross-section Pending JPS5582609A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP15638078A JPS5582609A (en) 1978-12-20 1978-12-20 Mold for pipe having deformed cross-section

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP15638078A JPS5582609A (en) 1978-12-20 1978-12-20 Mold for pipe having deformed cross-section

Publications (1)

Publication Number Publication Date
JPS5582609A true JPS5582609A (en) 1980-06-21

Family

ID=15626478

Family Applications (1)

Application Number Title Priority Date Filing Date
JP15638078A Pending JPS5582609A (en) 1978-12-20 1978-12-20 Mold for pipe having deformed cross-section

Country Status (1)

Country Link
JP (1) JPS5582609A (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE102007051674A1 (en) * 2007-10-26 2009-04-30 Rehau Ag + Co. Method for deforming pipes

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE102007051674A1 (en) * 2007-10-26 2009-04-30 Rehau Ag + Co. Method for deforming pipes

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