JPS5653042A - Production of heat-shrinkable tube - Google Patents

Production of heat-shrinkable tube

Info

Publication number
JPS5653042A
JPS5653042A JP13034679A JP13034679A JPS5653042A JP S5653042 A JPS5653042 A JP S5653042A JP 13034679 A JP13034679 A JP 13034679A JP 13034679 A JP13034679 A JP 13034679A JP S5653042 A JPS5653042 A JP S5653042A
Authority
JP
Japan
Prior art keywords
tube
blank
speed
shrinkage factor
longitudinal shrinkage
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.)
Granted
Application number
JP13034679A
Other languages
Japanese (ja)
Other versions
JPS635256B2 (en
Inventor
Masami Kitamura
Mitsuhiro Hida
Kazuo Momo
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.)
Mitsubishi Plastics Inc
Original Assignee
Mitsubishi Plastics Inc
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 Mitsubishi Plastics Inc filed Critical Mitsubishi Plastics Inc
Priority to JP13034679A priority Critical patent/JPS5653042A/en
Publication of JPS5653042A publication Critical patent/JPS5653042A/en
Publication of JPS635256B2 publication Critical patent/JPS635256B2/ja
Granted 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
    • B29C61/00—Shaping by liberation of internal stresses; Making preforms having internal stresses; Apparatus therefor
    • B29C61/06—Making preforms having internal stresses, e.g. plastic memory
    • B29C61/08—Making preforms having internal stresses, e.g. plastic memory by stretching tubes
    • 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
    • B29C48/00—Extrusion moulding, i.e. expressing the moulding material through a die or nozzle which imparts the desired form; Apparatus therefor
    • B29C48/25—Component parts, details or accessories; Auxiliary operations
    • B29C48/92—Measuring, controlling or regulating
    • 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
    • B29C61/00—Shaping by liberation of internal stresses; Making preforms having internal stresses; Apparatus therefor
    • B29C61/06—Making preforms having internal stresses, e.g. plastic memory
    • 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
    • B29C2948/00—Indexing scheme relating to extrusion moulding
    • B29C2948/92—Measuring, controlling or regulating
    • B29C2948/92504—Controlled parameter
    • B29C2948/9258—Velocity
    • 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
    • B29C2948/00—Indexing scheme relating to extrusion moulding
    • B29C2948/92—Measuring, controlling or regulating
    • B29C2948/92819—Location or phase of control
    • B29C2948/92933—Conveying, transporting or storage of articles

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Extrusion Moulding Of Plastics Or The Like (AREA)
  • Shaping By String And By Release Of Stress In Plastics And The Like (AREA)

Abstract

PURPOSE:To obtain the titled tube having a small longitudinal shrinkage factor and suitable for covering articles by a method wherein the resin extrusion speed and the taking-up speed are controlled so as to impart a longitudinal shrinkage factor to the tube when conducting tubular stretching, which is then heated and stretched in the radial direction. CONSTITUTION:When conducting the tubular stretching of the blank tube made of synthetic resin such as polyvinyl chloride, crosslinked polyethylene, polypropylene or the like by utilizing an internal fluid pressure, the extrusion speed of the synthetic resin and the taking-up speed are controlled so as to impart the longitudinal shrinkage factor of 4-10% to the blank tube. Then the blank tube 1 is heated by infrared rays, hot blast or the like in a heating tunnel 3 between two sets of nip rolls 2, 4, wherein the speed ratio of the upstream-side rolls 2 to the downstream- side rolls 4 is set to be 1-1.1. Compressed air B is introduced into the tube blank 1 from the downstream side, the tube blank 1 is stretched while being sized by an outside sizing sleeve 5, and then taken up by a take-up roll 6.
JP13034679A 1979-10-09 1979-10-09 Production of heat-shrinkable tube Granted JPS5653042A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP13034679A JPS5653042A (en) 1979-10-09 1979-10-09 Production of heat-shrinkable tube

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP13034679A JPS5653042A (en) 1979-10-09 1979-10-09 Production of heat-shrinkable tube

Publications (2)

Publication Number Publication Date
JPS5653042A true JPS5653042A (en) 1981-05-12
JPS635256B2 JPS635256B2 (en) 1988-02-02

Family

ID=15032186

Family Applications (1)

Application Number Title Priority Date Filing Date
JP13034679A Granted JPS5653042A (en) 1979-10-09 1979-10-09 Production of heat-shrinkable tube

Country Status (1)

Country Link
JP (1) JPS5653042A (en)

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS63257623A (en) * 1987-04-15 1988-10-25 Mitsubishi Plastics Ind Ltd Heat-shrinkable tube and manufacture thereof
KR100755570B1 (en) 2006-03-09 2007-09-06 엘에스전선 주식회사 Apparatus for heating thermal contraction tube using infrared ray
KR100755571B1 (en) 2006-03-09 2007-09-06 엘에스전선 주식회사 Method for manufacturing an heat shrinkable tube by using infrared heating crosslinking
KR100819605B1 (en) 2007-02-22 2008-04-04 엘에스전선 주식회사 Apparatus and method for manufacturing an heat shrinkable tube by having equality diameter

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN111231384A (en) * 2020-01-20 2020-06-05 东南大学泰州生物医药与医疗器械研究院 Dynamic forming method of thin-wall circular tube for degradable vascular stent

Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS4932972A (en) * 1972-07-27 1974-03-26
JPS5125387A (en) * 1974-08-24 1976-03-01 Matsushita Electric Works Ltd Shomeikiguno toritsukesochi

Patent Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS4932972A (en) * 1972-07-27 1974-03-26
JPS5125387A (en) * 1974-08-24 1976-03-01 Matsushita Electric Works Ltd Shomeikiguno toritsukesochi

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS63257623A (en) * 1987-04-15 1988-10-25 Mitsubishi Plastics Ind Ltd Heat-shrinkable tube and manufacture thereof
KR100755570B1 (en) 2006-03-09 2007-09-06 엘에스전선 주식회사 Apparatus for heating thermal contraction tube using infrared ray
KR100755571B1 (en) 2006-03-09 2007-09-06 엘에스전선 주식회사 Method for manufacturing an heat shrinkable tube by using infrared heating crosslinking
KR100819605B1 (en) 2007-02-22 2008-04-04 엘에스전선 주식회사 Apparatus and method for manufacturing an heat shrinkable tube by having equality diameter

Also Published As

Publication number Publication date
JPS635256B2 (en) 1988-02-02

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