GB1481784A - Moulding - Google Patents

Moulding

Info

Publication number
GB1481784A
GB1481784A GB24364/73A GB2436473A GB1481784A GB 1481784 A GB1481784 A GB 1481784A GB 24364/73 A GB24364/73 A GB 24364/73A GB 2436473 A GB2436473 A GB 2436473A GB 1481784 A GB1481784 A GB 1481784A
Authority
GB
United Kingdom
Prior art keywords
mould
parison
blowing
receptacle
stage
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.)
Expired
Application number
GB24364/73A
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.)
Individual
Original Assignee
Individual
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 Individual filed Critical Individual
Priority to GB24364/73A priority Critical patent/GB1481784A/en
Publication of GB1481784A publication Critical patent/GB1481784A/en
Expired 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
    • B29C49/18—Blow-moulding, i.e. blowing a preform or parison to a desired shape within a mould; Apparatus therefor using several blowing steps
    • 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
    • B29C49/0031—Making articles having hollow walls
    • 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
    • B29C49/08—Biaxial stretching during blow-moulding
    • B29C49/16—Biaxial stretching during blow-moulding using pressure difference for pre-stretching, e.g. pre-blowing
    • B29C49/1602—Biaxial stretching during blow-moulding using pressure difference for pre-stretching, e.g. pre-blowing pre-blowing without using a mould

Landscapes

  • Engineering & Computer Science (AREA)
  • Manufacturing & Machinery (AREA)
  • Mechanical Engineering (AREA)
  • Blow-Moulding Or Thermoforming Of Plastics Or The Like (AREA)

Abstract

1481784 Blow-moulding J L WALLIS 21 Aug 1974 [22 May 1973] 24364/73 Heading B5A A double walled receptacle is produced by a blow-moulding process in which the parison is firstly inflated by a gas, the mould parts are closed around the inflated parison and a mould member is displaced to depress a portion of the parison and a second blowing stage is effected so that the depressed portion forms an opening in the receptacle to receive contents. Closing of the mould parts preferably seals the hole through which the first stage blowing is effected and pierces the parison for the second stage blowing. For the formation of pockets or compartments in the receptacle, the mould may have additional movable parts which may have blowing means. First stage blowing may be effected through one or both open ends of the parison. The receptacle may have handle sections formed by the nipping edges of the mould. The material may be high or low density polyethylene or polypropylene. The mould and mandrels may be cooled.
GB24364/73A 1974-08-21 1974-08-21 Moulding Expired GB1481784A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
GB24364/73A GB1481784A (en) 1974-08-21 1974-08-21 Moulding

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
GB24364/73A GB1481784A (en) 1974-08-21 1974-08-21 Moulding

Publications (1)

Publication Number Publication Date
GB1481784A true GB1481784A (en) 1977-08-03

Family

ID=10210566

Family Applications (1)

Application Number Title Priority Date Filing Date
GB24364/73A Expired GB1481784A (en) 1974-08-21 1974-08-21 Moulding

Country Status (1)

Country Link
GB (1) GB1481784A (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB2318541A (en) * 1996-10-25 1998-04-29 Menza Ltd A method of blow moulding

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB2318541A (en) * 1996-10-25 1998-04-29 Menza Ltd A method of blow moulding
US5863489A (en) * 1996-10-25 1999-01-26 Menza Limited Method of blow-moulding
GB2318541B (en) * 1996-10-25 1999-06-16 Menza Ltd A method of blow-moulding

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Legal Events

Date Code Title Description
PS Patent sealed [section 19, patents act 1949]
PCNP Patent ceased through non-payment of renewal fee