JPS5774110A - Preparation of circular expanded part on thermoplastic resin tube - Google Patents

Preparation of circular expanded part on thermoplastic resin tube

Info

Publication number
JPS5774110A
JPS5774110A JP15245880A JP15245880A JPS5774110A JP S5774110 A JPS5774110 A JP S5774110A JP 15245880 A JP15245880 A JP 15245880A JP 15245880 A JP15245880 A JP 15245880A JP S5774110 A JPS5774110 A JP S5774110A
Authority
JP
Japan
Prior art keywords
thermoplastic resin
tube
expanded part
resin tube
softening
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
JP15245880A
Other languages
Japanese (ja)
Inventor
Kinji Tsuboi
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.)
Sekisui Chemical Co Ltd
Original Assignee
Sekisui Chemical 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 Sekisui Chemical Co Ltd filed Critical Sekisui Chemical Co Ltd
Priority to JP15245880A priority Critical patent/JPS5774110A/en
Publication of JPS5774110A publication Critical patent/JPS5774110A/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
    • 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

Landscapes

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

Abstract

PURPOSE:To eliminate the dimensional errors of an expanded part of a thermoplastic tube by simply forming it by means of a core which is put on and removed thereform by quickly heating, softening and then causing the part to contract without softening other part within a range of specified dimensions from the innermost end of the tube. CONSTITUTION:A socket part 2 and an expanded part 3 are formed by inserting a core for expansion having a plurality of stages into the end of a thermoplastic resin tube 1 which is heated and softened in advance to expand its diameter. Next, the end of the expanded part 3 is quickly heated and softened without softening other part of the tube within a range of specified dimensions from its innermost end, and then the end part is caused to contract into the same inner diameter as that of the socket part 2 to eventually form a circular expanded part 6 on the thermoplastic resin tube 1.
JP15245880A 1980-10-29 1980-10-29 Preparation of circular expanded part on thermoplastic resin tube Pending JPS5774110A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP15245880A JPS5774110A (en) 1980-10-29 1980-10-29 Preparation of circular expanded part on thermoplastic resin tube

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP15245880A JPS5774110A (en) 1980-10-29 1980-10-29 Preparation of circular expanded part on thermoplastic resin tube

Publications (1)

Publication Number Publication Date
JPS5774110A true JPS5774110A (en) 1982-05-10

Family

ID=15540951

Family Applications (1)

Application Number Title Priority Date Filing Date
JP15245880A Pending JPS5774110A (en) 1980-10-29 1980-10-29 Preparation of circular expanded part on thermoplastic resin tube

Country Status (1)

Country Link
JP (1) JPS5774110A (en)

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