JPS57178815A - Apparatus for molding bellows - Google Patents

Apparatus for molding bellows

Info

Publication number
JPS57178815A
JPS57178815A JP6594381A JP6594381A JPS57178815A JP S57178815 A JPS57178815 A JP S57178815A JP 6594381 A JP6594381 A JP 6594381A JP 6594381 A JP6594381 A JP 6594381A JP S57178815 A JPS57178815 A JP S57178815A
Authority
JP
Japan
Prior art keywords
molding
raw pipe
bellows
die
molding roller
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
JP6594381A
Other languages
Japanese (ja)
Inventor
Jinichiro Araki
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.)
Toshiba Corp
Original Assignee
Toshiba Corp
Tokyo Shibaura Electric Co 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 Toshiba Corp, Tokyo Shibaura Electric Co Ltd filed Critical Toshiba Corp
Priority to JP6594381A priority Critical patent/JPS57178815A/en
Publication of JPS57178815A publication Critical patent/JPS57178815A/en
Pending legal-status Critical Current

Links

Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE 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
    • B29C57/00—Shaping of tube ends, e.g. flanging, belling or closing; Apparatus therefor, e.g. collapsible mandrels
    • B29C57/02—Belling or enlarging, e.g. combined with forming a groove
    • B29C57/04—Belling or enlarging, e.g. combined with forming a groove using mechanical means
    • B29C57/045—Belling or enlarging, e.g. combined with forming a groove using mechanical means rotating

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Shaping Of Tube Ends By Bending Or Straightening (AREA)

Abstract

PURPOSE:To mold at a low cost bellows with a large diameter, by arranging a set of molding pieces on the inner and outer surfaces of a raw pipe, and moving the molding pieces circumferentially. CONSTITUTION:A part of the raw pipe 9 where molding will be done is conducted and set between the molding roller 4 and the die piece 12. A connecting part 17 is connected to a port 16a, and after a prescribed pressure is applied on the side of the die piece 12, the connecting part 17 is removed. At the same time, when a prescribed pressure is applied on the side of the molding roller 4 via an oil passage 2 and branch oil passages 7, 7, the circumferential part of the wall of the raw pipe 9 is formed into an arcuate bulged part 23 projected outwardly by mating with the die 12 and the molding roller 4. In this state, when a molding piece moving mechanism 19 is operated, the die piece 12 and the molding roller 4 are rotated one turn, so that the bulged part 23 is extended circumferentially to form a turn of bellows having a prescribed height.
JP6594381A 1981-04-30 1981-04-30 Apparatus for molding bellows Pending JPS57178815A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP6594381A JPS57178815A (en) 1981-04-30 1981-04-30 Apparatus for molding bellows

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP6594381A JPS57178815A (en) 1981-04-30 1981-04-30 Apparatus for molding bellows

Publications (1)

Publication Number Publication Date
JPS57178815A true JPS57178815A (en) 1982-11-04

Family

ID=13301550

Family Applications (1)

Application Number Title Priority Date Filing Date
JP6594381A Pending JPS57178815A (en) 1981-04-30 1981-04-30 Apparatus for molding bellows

Country Status (1)

Country Link
JP (1) JPS57178815A (en)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5346663A (en) * 1991-10-31 1994-09-13 Bridgestone Corporation Method of producing a spliceless annular tread cap
WO2003026873A1 (en) * 2001-09-21 2003-04-03 Sekisui Chemical Co., Ltd. Cylindrical molding, and production method for this cylindrical molding and molding device used in this production method

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5346663A (en) * 1991-10-31 1994-09-13 Bridgestone Corporation Method of producing a spliceless annular tread cap
WO2003026873A1 (en) * 2001-09-21 2003-04-03 Sekisui Chemical Co., Ltd. Cylindrical molding, and production method for this cylindrical molding and molding device used in this production method

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