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GB972662A - An improved pressure forming process - Google Patents

An improved pressure forming process

Info

Publication number
GB972662A
GB972662A GB1504063A GB1504063A GB972662A GB 972662 A GB972662 A GB 972662A GB 1504063 A GB1504063 A GB 1504063A GB 1504063 A GB1504063 A GB 1504063A GB 972662 A GB972662 A GB 972662A
Authority
GB
United Kingdom
Prior art keywords
sheet material
sheet
heated
cavity
mould
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
GB1504063A
Inventor
Sidney Walter Fagence
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.)
ML Shelley and Partners Ltd
Original Assignee
ML Shelley and Partners 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 ML Shelley and Partners Ltd filed Critical ML Shelley and Partners Ltd
Priority to GB1504063A priority Critical patent/GB972662A/en
Publication of GB972662A publication Critical patent/GB972662A/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
    • B29C51/00—Shaping by thermoforming, i.e. shaping sheets or sheet like preforms after heating, e.g. shaping sheets in matched moulds or by deep-drawing; Apparatus therefor
    • B29C51/04—Combined thermoforming and prestretching, e.g. biaxial stretching
    • 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
    • B29C51/00—Shaping by thermoforming, i.e. shaping sheets or sheet like preforms after heating, e.g. shaping sheets in matched moulds or by deep-drawing; Apparatus therefor
    • B29C51/10—Forming by pressure difference, e.g. vacuum

Landscapes

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

Abstract

972,662. Moulding hollow articles. M. L. SHELLEY & PARTNERS Ltd. April 17, 1963 [April 19, 1962], No. 15040/63. Divided out of 972,325. Heading B5A. In a method of pressure forming thermoplastic sheet material in which a portion of the sheet material is placed in a position overlying and adjacent to a face of a cavitied mould, clamped peripherally, heated to a softened and stretchable state for moulding and a gas at greater than atmospheric pressure is applied to the sheet to cause it to be pressed intimately against the mould and conform to the shape of the or each cavity, the sheet material 9 is heated and pre-extended before the clamping operation and the application of heat and pressure by means of assist plugs 10 which are lowered through the heater 1 to move the softened plastic sheet partially into the or each of the mould cavities 4, thus allowing some of the material over the land areas about the or each cavity to be used. Alternatively, the sheet material 21 may be heated against a shaped plunger 19 which then moves the sheet partially into the or each moulded cavity 24.
GB1504063A 1962-04-19 1962-04-19 An improved pressure forming process Expired GB972662A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
GB1504063A GB972662A (en) 1962-04-19 1962-04-19 An improved pressure forming process

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
GB1504063A GB972662A (en) 1962-04-19 1962-04-19 An improved pressure forming process

Publications (1)

Publication Number Publication Date
GB972662A true GB972662A (en) 1964-10-14

Family

ID=10051992

Family Applications (1)

Application Number Title Priority Date Filing Date
GB1504063A Expired GB972662A (en) 1962-04-19 1962-04-19 An improved pressure forming process

Country Status (1)

Country Link
GB (1) GB972662A (en)

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2512385A1 (en) * 1981-09-04 1983-03-11 Cosden Technology PROCESS AND APPARATUS FOR PRODUCING BIORENT HOLLOW ARTICLES
US4728381A (en) * 1986-05-12 1988-03-01 Hooper, Inc. Machine and method for manufacturing a disposable absorbent continence pad
WO2003037605A1 (en) * 2001-10-31 2003-05-08 3M Innovative Properties Company Methods of thermoforming non-self-supporting polymeric films and articles made therefrom
US7361402B2 (en) 2001-10-31 2008-04-22 3M Innovative Properties Company Cross-linked primer composition and use thereof in thermoformable films
CN110253864A (en) * 2019-07-30 2019-09-20 青岛鑫科机械科技有限公司 A fully automatic V-method film forming system

Cited By (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2512385A1 (en) * 1981-09-04 1983-03-11 Cosden Technology PROCESS AND APPARATUS FOR PRODUCING BIORENT HOLLOW ARTICLES
US4728381A (en) * 1986-05-12 1988-03-01 Hooper, Inc. Machine and method for manufacturing a disposable absorbent continence pad
WO2003037605A1 (en) * 2001-10-31 2003-05-08 3M Innovative Properties Company Methods of thermoforming non-self-supporting polymeric films and articles made therefrom
US7361402B2 (en) 2001-10-31 2008-04-22 3M Innovative Properties Company Cross-linked primer composition and use thereof in thermoformable films
US7507363B2 (en) 2001-10-31 2009-03-24 3M Innovative Properties Company Methods of thermoforming non-self-supporting polymeric films and articles made therefrom
CN110253864A (en) * 2019-07-30 2019-09-20 青岛鑫科机械科技有限公司 A fully automatic V-method film forming system

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