JPS5557429A - Preparation of cylindrical molding of polytetrafluoro- ethylene resin - Google Patents

Preparation of cylindrical molding of polytetrafluoro- ethylene resin

Info

Publication number
JPS5557429A
JPS5557429A JP13001978A JP13001978A JPS5557429A JP S5557429 A JPS5557429 A JP S5557429A JP 13001978 A JP13001978 A JP 13001978A JP 13001978 A JP13001978 A JP 13001978A JP S5557429 A JPS5557429 A JP S5557429A
Authority
JP
Japan
Prior art keywords
mold
space
cylindrical
ptfe
sheet
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
JP13001978A
Other languages
Japanese (ja)
Inventor
Yoshio 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.)
Nippon Valqua Industries Ltd
Nihon Valqua Kogyo KK
Original Assignee
Nippon Valqua Industries Ltd
Nihon Valqua Kogyo KK
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 Nippon Valqua Industries Ltd, Nihon Valqua Kogyo KK filed Critical Nippon Valqua Industries Ltd
Priority to JP13001978A priority Critical patent/JPS5557429A/en
Publication of JPS5557429A publication Critical patent/JPS5557429A/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
    • B29C53/00—Shaping by bending, folding, twisting, straightening or flattening; Apparatus therefor
    • B29C53/36—Bending and joining, e.g. for making hollow articles
    • B29C53/38—Bending and joining, e.g. for making hollow articles by bending sheets or strips at right angles to the longitudinal axis of the article being formed and joining the edges
    • B29C53/40—Bending and joining, e.g. for making hollow articles by bending sheets or strips at right angles to the longitudinal axis of the article being formed and joining the edges for articles of definite length, i.e. discrete articles
    • B29C53/42—Bending and joining, e.g. for making hollow articles by bending sheets or strips at right angles to the longitudinal axis of the article being formed and joining the edges for articles of definite length, i.e. discrete articles using internal forming surfaces, e.g. 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
    • B29C65/00—Joining or sealing of preformed parts, e.g. welding of plastics materials; Apparatus therefor
    • B29C65/02—Joining or sealing of preformed parts, e.g. welding of plastics materials; Apparatus therefor by heating, with or without pressure
    • 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
    • B29C66/00—General aspects of processes or apparatus for joining preformed parts
    • B29C66/01—General aspects dealing with the joint area or with the area to be joined
    • B29C66/05—Particular design of joint configurations
    • B29C66/10—Particular design of joint configurations particular design of the joint cross-sections
    • B29C66/11—Joint cross-sections comprising a single joint-segment, i.e. one of the parts to be joined comprising a single joint-segment in the joint cross-section
    • B29C66/114—Single butt joints
    • B29C66/1142—Single butt to butt joints
    • 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
    • B29C66/00—General aspects of processes or apparatus for joining preformed parts
    • B29C66/40—General aspects of joining substantially flat articles, e.g. plates, sheets or web-like materials; Making flat seams in tubular or hollow articles; Joining single elements to substantially flat surfaces
    • B29C66/41—Joining substantially flat articles ; Making flat seams in tubular or hollow articles
    • B29C66/43—Joining a relatively small portion of the surface of said articles
    • B29C66/432—Joining a relatively small portion of the surface of said articles for making tubular articles or closed loops, e.g. by joining several sheets ; for making hollow articles or hollow preforms
    • B29C66/4322—Joining a relatively small portion of the surface of said articles for making tubular articles or closed loops, e.g. by joining several sheets ; for making hollow articles or hollow preforms by joining a single sheet to itself
    • 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
    • B29C66/00—General aspects of processes or apparatus for joining preformed parts
    • B29C66/70—General aspects of processes or apparatus for joining preformed parts characterised by the composition, physical properties or the structure of the material of the parts to be joined; Joining with non-plastics material
    • B29C66/71—General aspects of processes or apparatus for joining preformed parts characterised by the composition, physical properties or the structure of the material of the parts to be joined; Joining with non-plastics material characterised by the composition of the plastics material of the parts to be joined
    • 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
    • B29C66/00—General aspects of processes or apparatus for joining preformed parts
    • B29C66/40—General aspects of joining substantially flat articles, e.g. plates, sheets or web-like materials; Making flat seams in tubular or hollow articles; Joining single elements to substantially flat surfaces
    • B29C66/49—Internally supporting the, e.g. tubular, article during joining
    • 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
    • B29K2027/12—Use of polyvinylhalogenides or derivatives thereof as moulding material containing fluorine
    • B29K2027/18—PTFE, i.e. polytetrafluorethene, e.g. ePTFE, i.e. expanded polytetrafluorethene

Landscapes

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

Abstract

PURPOSE: To obtain a cylindrical molding of uniform looking and thickness by loading, into a space surrounded by a cylindrical mold, a cylindrical sheet of polytetrafluoroethylene resin smaller than the space and heating the resin above its melting point.
CONSTITUTION: A mandrel 2 is inserted into a cylindrical mold 1, and in the space 4, a cylindrical sheet A' of polytetrafluoroethylene resin (PTFE) is loaded with its upper and lower edges contacted to the upper and lower clamping molds 3 and 3', and the mold 3 is fixed to the cylindrical mold 1 with bolts. At this time, the volume of the sheet A' at room temperatures is smaller than the volume of the space 4. Next, the mold containing the resin is loaded into an electric furnace and heated above the melting point (327°C) of PTFE to make the PTFE sheet A' expand in the mold space and fill the space 4 completely, and at the same time, make both butt ends welded by the expansion pressure. By taking out of the metal mold after cooled gradually, a cylinder A made of PTFE is obtained whose outer looking and thickness are uniform and whose butt ends are welded firmly.
COPYRIGHT: (C)1980,JPO&Japio
JP13001978A 1978-10-24 1978-10-24 Preparation of cylindrical molding of polytetrafluoro- ethylene resin Pending JPS5557429A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP13001978A JPS5557429A (en) 1978-10-24 1978-10-24 Preparation of cylindrical molding of polytetrafluoro- ethylene resin

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP13001978A JPS5557429A (en) 1978-10-24 1978-10-24 Preparation of cylindrical molding of polytetrafluoro- ethylene resin

Publications (1)

Publication Number Publication Date
JPS5557429A true JPS5557429A (en) 1980-04-28

Family

ID=15024144

Family Applications (1)

Application Number Title Priority Date Filing Date
JP13001978A Pending JPS5557429A (en) 1978-10-24 1978-10-24 Preparation of cylindrical molding of polytetrafluoro- ethylene resin

Country Status (1)

Country Link
JP (1) JPS5557429A (en)

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5944930A (en) * 1994-11-08 1999-08-31 Canon Kabushiki Kaisha Method of manufacturing tubular film
KR100428261B1 (en) * 2001-06-22 2004-04-28 정동관 Adhesion mathod of PTFE things
CN108638548A (en) * 2018-05-14 2018-10-12 马根昌 Tank body self-forming device

Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS4917476A (en) * 1972-06-05 1974-02-15

Patent Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS4917476A (en) * 1972-06-05 1974-02-15

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5944930A (en) * 1994-11-08 1999-08-31 Canon Kabushiki Kaisha Method of manufacturing tubular film
US6962637B2 (en) 1994-11-08 2005-11-08 Canon Kabushiki Kaisha Method of manufacturing tubular film
KR100428261B1 (en) * 2001-06-22 2004-04-28 정동관 Adhesion mathod of PTFE things
CN108638548A (en) * 2018-05-14 2018-10-12 马根昌 Tank body self-forming device

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