JPS57156227A - Manufacture of tubular body - Google Patents

Manufacture of tubular body

Info

Publication number
JPS57156227A
JPS57156227A JP56042672A JP4267281A JPS57156227A JP S57156227 A JPS57156227 A JP S57156227A JP 56042672 A JP56042672 A JP 56042672A JP 4267281 A JP4267281 A JP 4267281A JP S57156227 A JPS57156227 A JP S57156227A
Authority
JP
Japan
Prior art keywords
external periphery
periphery
external
tubular
melting point
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
JP56042672A
Other languages
Japanese (ja)
Inventor
Kazuo Nakayama
Hisaaki Kanetsuna
Shiro Nakano
Hiroshi Kiyono
Eiki Nakamura
Masashi Kida
Hidemasa Yano
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.)
National Institute of Advanced Industrial Science and Technology AIST
Sekisui Chemical Co Ltd
Original Assignee
Agency of Industrial Science and Technology
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 Agency of Industrial Science and Technology, Sekisui Chemical Co Ltd filed Critical Agency of Industrial Science and Technology
Priority to JP56042672A priority Critical patent/JPS57156227A/en
Publication of JPS57156227A publication Critical patent/JPS57156227A/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
    • B29C55/00—Shaping by stretching, e.g. drawing through a die; Apparatus therefor
    • B29C55/30—Drawing through a die
    • 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
    • B29C48/03—Extrusion moulding, i.e. expressing the moulding material through a die or nozzle which imparts the desired form; Apparatus therefor characterised by the shape of the extruded material at extrusion
    • B29C48/09—Articles with cross-sections having partially or fully enclosed cavities, e.g. pipes or channels
    • 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
    • B29C48/30—Extrusion nozzles or dies
    • B29C48/32—Extrusion nozzles or dies with annular openings, e.g. for forming tubular articles

Abstract

PURPOSE:To obtain a tubular body excellent in mechanical strength when cylindrical or tubular member made high molecular material is extruded through a die at a temperature not exceeding its melting point to form the tubular body larger in the external periphery then said member by giving specific values to the expansion ratio and the extrusion ratio. CONSTITUTION:When a cylindrical or tubular member made from high molecular material (such as PE, PP etc.) is allowed to pass through a die at its melting point or lower to form a tubular form farger in the external periphery than said member, 1.5-1.7 is given to the expansion ratio represented by formulaI(d1: external periphery of the member before formed, d2: internal periphery of the member, D1: external periphery of the product, D2: internal periphery of the product) and 1 or more is given to the extrusion ratio shown by formula II (S1: sectional area perpendicular to the extruding direction of the member before formed, S2: sectional area perpendicular to the extruding direction after formed). The tube body can be manufactured, for example, with an apparatus shown in the figure. A material wherein the external diameter or the external periphery is almost equal to the diameter or the external periphery of the introducing part 11 of the external diameter 1 is desired to be preheated at a temperature not exceeding the melting point of the constituting high molecular material and to be inserted into the cylinder 2 and to be extruded by a piston.
JP56042672A 1981-03-23 1981-03-23 Manufacture of tubular body Pending JPS57156227A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP56042672A JPS57156227A (en) 1981-03-23 1981-03-23 Manufacture of tubular body

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP56042672A JPS57156227A (en) 1981-03-23 1981-03-23 Manufacture of tubular body

Publications (1)

Publication Number Publication Date
JPS57156227A true JPS57156227A (en) 1982-09-27

Family

ID=12642512

Family Applications (1)

Application Number Title Priority Date Filing Date
JP56042672A Pending JPS57156227A (en) 1981-03-23 1981-03-23 Manufacture of tubular body

Country Status (1)

Country Link
JP (1) JPS57156227A (en)

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO1996006720A1 (en) * 1994-08-29 1996-03-07 Srp Industries Ltd. Filler reinforced thermoplastic composites having biaxially oriented components
WO2000021732A1 (en) * 1998-10-13 2000-04-20 Sekisui Chemical Co., Ltd. Biaxially oriented polyolefin pipe
JP2000117831A (en) * 1998-10-13 2000-04-25 Sekisui Chem Co Ltd Biaxially oriented polyolefin tube
JP2008543608A (en) * 2005-07-29 2008-12-04 エルジー・ケム・リミテッド Method and apparatus for extrusion of solid state polymer using ultrasonic wave
JP2010253755A (en) * 2009-04-23 2010-11-11 Nichias Corp Extrusion mold for polytetrafluoroethylene particle-containing material, extruder for polytetrafluoroethylene particle-containing material, method of producing polytetrafluoroethylene sheet-like product, method of producing polytetrafluoroethylene porous sheet-like product, method of producing polytetrafluoroethylene sheet-like baked product, method of producing polytetrafluoroethylene porous sheet-like baked product, and polytetrafluoroethylene sheet-like baked product

Cited By (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO1996006720A1 (en) * 1994-08-29 1996-03-07 Srp Industries Ltd. Filler reinforced thermoplastic composites having biaxially oriented components
WO2000021732A1 (en) * 1998-10-13 2000-04-20 Sekisui Chemical Co., Ltd. Biaxially oriented polyolefin pipe
JP2000117831A (en) * 1998-10-13 2000-04-25 Sekisui Chem Co Ltd Biaxially oriented polyolefin tube
JP4511646B2 (en) * 1998-10-13 2010-07-28 積水化学工業株式会社 Method for producing biaxially oriented polyolefin tube
JP2008543608A (en) * 2005-07-29 2008-12-04 エルジー・ケム・リミテッド Method and apparatus for extrusion of solid state polymer using ultrasonic wave
JP2010253755A (en) * 2009-04-23 2010-11-11 Nichias Corp Extrusion mold for polytetrafluoroethylene particle-containing material, extruder for polytetrafluoroethylene particle-containing material, method of producing polytetrafluoroethylene sheet-like product, method of producing polytetrafluoroethylene porous sheet-like product, method of producing polytetrafluoroethylene sheet-like baked product, method of producing polytetrafluoroethylene porous sheet-like baked product, and polytetrafluoroethylene sheet-like baked product

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