JPS5573527A - Forming method of synthetic resin pipe of small thickness - Google Patents

Forming method of synthetic resin pipe of small thickness

Info

Publication number
JPS5573527A
JPS5573527A JP14842678A JP14842678A JPS5573527A JP S5573527 A JPS5573527 A JP S5573527A JP 14842678 A JP14842678 A JP 14842678A JP 14842678 A JP14842678 A JP 14842678A JP S5573527 A JPS5573527 A JP S5573527A
Authority
JP
Japan
Prior art keywords
parison
lower mold
mold
contact
synthetic resin
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
JP14842678A
Other languages
Japanese (ja)
Inventor
Tatsuya Nakagawa
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.)
Ekuseru Kk
Cargill Meat Solutions Corp
Original Assignee
Ekuseru Kk
Excel 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 Ekuseru Kk, Excel Corp filed Critical Ekuseru Kk
Priority to JP14842678A priority Critical patent/JPS5573527A/en
Publication of JPS5573527A publication Critical patent/JPS5573527A/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
    • B29C49/00—Blow-moulding, i.e. blowing a preform or parison to a desired shape within a mould; Apparatus therefor
    • B29C49/28—Blow-moulding apparatus
    • B29C49/30—Blow-moulding apparatus having movable moulds or mould parts
    • B29C49/36—Blow-moulding apparatus having movable moulds or mould parts rotatable about one axis
    • 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
    • B29C49/00—Blow-moulding, i.e. blowing a preform or parison to a desired shape within a mould; Apparatus therefor
    • B29C49/071—Preforms or parisons characterised by their configuration, e.g. geometry, dimensions or physical properties
    • 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
    • B29C49/00—Blow-moulding, i.e. blowing a preform or parison to a desired shape within a mould; Apparatus therefor
    • B29C49/02—Combined blow-moulding and manufacture of the preform or the parison
    • B29C49/04—Extrusion blow-moulding

Abstract

PURPOSE:To blow-mold a synthetic resin pipe of small uniform thickness by a horizontal metal mold, by previously thinly shaping the bottom of parison which comes into contact with a lower mold and by utilizing a partial expansion percentage difference due to cooling by the lower mold. CONSTITUTION:Parison 1 is formed and extruded from an outlet port by an extruder A. The lower mold 5a of a metal mold unit 5 is rotated to feed the parison to the lower mold. A die 6 is eccentrically installed at the outlet port 2 of the extruder A. A molten resin 8 supplied by a screw 7 is formed into the cylindrical parison 1 having a thin part 1'. The parison is fed to the lower mold 5a. The upper and lower molds 5b, 5a are brought into pressural contact with each other. Compressed air is forcedly introduced into the parison 1 from an air injection valve 10 so that the parison is expanded and molded as the from of the metal mold 5. At that time, the temperature of the part of the parison in contact with the lower mold 5a is slightly reduced and has a smaller extension percentage than the remaining part of the parison. However, a shaped product of uniform thickness is obtained because the thickness of the parison is previously decreased.
JP14842678A 1978-11-29 1978-11-29 Forming method of synthetic resin pipe of small thickness Pending JPS5573527A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP14842678A JPS5573527A (en) 1978-11-29 1978-11-29 Forming method of synthetic resin pipe of small thickness

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP14842678A JPS5573527A (en) 1978-11-29 1978-11-29 Forming method of synthetic resin pipe of small thickness

Publications (1)

Publication Number Publication Date
JPS5573527A true JPS5573527A (en) 1980-06-03

Family

ID=15452523

Family Applications (1)

Application Number Title Priority Date Filing Date
JP14842678A Pending JPS5573527A (en) 1978-11-29 1978-11-29 Forming method of synthetic resin pipe of small thickness

Country Status (1)

Country Link
JP (1) JPS5573527A (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US6416313B1 (en) * 1999-05-18 2002-07-09 Fischer-W. Müller Blasformtechnik GmbH Blow molding machine for low-waste blow molding

Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS50132066A (en) * 1974-04-06 1975-10-18

Patent Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS50132066A (en) * 1974-04-06 1975-10-18

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US6416313B1 (en) * 1999-05-18 2002-07-09 Fischer-W. Müller Blasformtechnik GmbH Blow molding machine for low-waste blow molding

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