JPS5478775A - Secondary fabrication of rigid pvc pipe - Google Patents

Secondary fabrication of rigid pvc pipe

Info

Publication number
JPS5478775A
JPS5478775A JP14735277A JP14735277A JPS5478775A JP S5478775 A JPS5478775 A JP S5478775A JP 14735277 A JP14735277 A JP 14735277A JP 14735277 A JP14735277 A JP 14735277A JP S5478775 A JPS5478775 A JP S5478775A
Authority
JP
Japan
Prior art keywords
pvc pipe
rigid pvc
pipe
molds
thickness
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
JP14735277A
Other languages
Japanese (ja)
Inventor
Hideki Kajiwara
Akiyoshi Honma
Masayoshi Kawakami
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.)
Kubota Corp
Original Assignee
Kubota Corp
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 Kubota Corp filed Critical Kubota Corp
Priority to JP14735277A priority Critical patent/JPS5478775A/en
Publication of JPS5478775A publication Critical patent/JPS5478775A/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
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29K—INDEXING SCHEME ASSOCIATED WITH SUBCLASSES B29B, B29C OR B29D, RELATING TO MOULDING MATERIALS OR TO MATERIALS FOR MOULDS, REINFORCEMENTS, FILLERS OR PREFORMED PARTS, e.g. INSERTS
    • B29K2027/00—Use of polyvinylhalogenides or derivatives thereof as moulding material
    • B29K2027/06—PVC, i.e. polyvinylchloride

Landscapes

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

Abstract

PURPOSE:To prepare a flawless rigid PVC pipe having partly expanded diameter and uniform thickness, by heating and expanding an end part of a rigid PVC pipe applying the part with specific pressure along the axis. CONSTITUTION:An end part of a rigid PVC pipe 1 is heated, and inserted between an inner mold 5 and an outer mold 18, and expanded its diameter while applying a pressure along its axis to prevent the decrease of the thickness of the pipe. The molds 5 and 18 are maintained at high temperature during the stage of inserting and pressing the PVC pipe therebetween; and after the size and the thickness of the pipe reach the desired values, the pressing force is decreased to a value higher than atmospneric pressure, and the temperature of the molds 5 and 18 is also decreased to a value higher than room temperature. After solidifying, the PVC pipe is released from the molds.
JP14735277A 1977-12-07 1977-12-07 Secondary fabrication of rigid pvc pipe Pending JPS5478775A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP14735277A JPS5478775A (en) 1977-12-07 1977-12-07 Secondary fabrication of rigid pvc pipe

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP14735277A JPS5478775A (en) 1977-12-07 1977-12-07 Secondary fabrication of rigid pvc pipe

Publications (1)

Publication Number Publication Date
JPS5478775A true JPS5478775A (en) 1979-06-23

Family

ID=15428235

Family Applications (1)

Application Number Title Priority Date Filing Date
JP14735277A Pending JPS5478775A (en) 1977-12-07 1977-12-07 Secondary fabrication of rigid pvc pipe

Country Status (1)

Country Link
JP (1) JPS5478775A (en)

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