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GB911647A - Improvements relating to heating platens of vacuum forming machines - Google Patents

Improvements relating to heating platens of vacuum forming machines

Info

Publication number
GB911647A
GB911647A GB2305359A GB2305359A GB911647A GB 911647 A GB911647 A GB 911647A GB 2305359 A GB2305359 A GB 2305359A GB 2305359 A GB2305359 A GB 2305359A GB 911647 A GB911647 A GB 911647A
Authority
GB
United Kingdom
Prior art keywords
elements
platen
heating
vacuum forming
sets
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
GB2305359A
Inventor
Stanley Howerd Adcock Thompson
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.)
Parnall and Sons Ltd
Original Assignee
Parnall and Sons 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 Parnall and Sons Ltd filed Critical Parnall and Sons Ltd
Priority to GB2305359A priority Critical patent/GB911647A/en
Publication of GB911647A publication Critical patent/GB911647A/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
    • B29C51/26—Component parts, details or accessories; Auxiliary operations
    • B29C51/42—Heating or cooling
    • B29C51/421—Heating or cooling of preforms, specially adapted for thermoforming
    • B29C51/422—Heating or cooling of preforms, specially adapted for thermoforming to produce a temperature differential
    • 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)
  • Moulds For Moulding Plastics Or The Like (AREA)
  • Heating, Cooling, Or Curing Plastics Or The Like In General (AREA)

Abstract

911,647. Electric heating platens. PARNALL & SONS Ltd. Sept. 26, 1960 [July 4, 1959], No. 23053/59. Class 39 (3). [Also in Group V] A heating platen in a vacuum forming machine incorporates an electric heating element or set of elements 12a-12c effective over a central area of the platen, and one or more separate elements or sets of elements 13a-13d and 14a- 14d disposed symmetrically about the central element or set of elements, each element or set of elements being independently controlled so as to provide a plurality of independentlyheated zones over the heating surface of the platen. The higher heat losses occurring at the edges of the platen may thus be offset, or the outer elements may be switched off to conserve energy when forming a small area of material. The heating elements are of the sheathed type and are secured to and spaced from a reflector plate by tie bolts 11 and angle sections 10. The elements of each set are connected in parallel by means of connector blocks 16 and connections are made through a conduit box 17 to three switches for the individual control of the sets of elements. The platen is mounted between a pair of arms 19 by trunnions 18, and is provided with four angle sections 20 forming a peripheral lip.
GB2305359A 1959-07-04 1959-07-04 Improvements relating to heating platens of vacuum forming machines Expired GB911647A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
GB2305359A GB911647A (en) 1959-07-04 1959-07-04 Improvements relating to heating platens of vacuum forming machines

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
GB2305359A GB911647A (en) 1959-07-04 1959-07-04 Improvements relating to heating platens of vacuum forming machines

Publications (1)

Publication Number Publication Date
GB911647A true GB911647A (en) 1962-11-28

Family

ID=10189344

Family Applications (1)

Application Number Title Priority Date Filing Date
GB2305359A Expired GB911647A (en) 1959-07-04 1959-07-04 Improvements relating to heating platens of vacuum forming machines

Country Status (1)

Country Link
GB (1) GB911647A (en)

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2185010A1 (en) * 1972-05-18 1973-12-28 Int Fabric Molders Inc
US4350875A (en) 1980-02-01 1982-09-21 Micropore International Ltd. Radiant heating elements for smooth top cookers
GB2172542A (en) * 1985-03-19 1986-09-24 Hazeldine Ind Group Limited Moulds
GB2259665A (en) * 1991-09-17 1993-03-24 Ford Motor Co Moulding a reinforced plastics component
EP3650197A1 (en) * 2018-11-06 2020-05-13 Uwe Beier Method and apparatus for forming flat substrates

Cited By (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2185010A1 (en) * 1972-05-18 1973-12-28 Int Fabric Molders Inc
US4350875A (en) 1980-02-01 1982-09-21 Micropore International Ltd. Radiant heating elements for smooth top cookers
GB2172542A (en) * 1985-03-19 1986-09-24 Hazeldine Ind Group Limited Moulds
GB2259665A (en) * 1991-09-17 1993-03-24 Ford Motor Co Moulding a reinforced plastics component
US5266259A (en) * 1991-09-17 1993-11-30 Ford Motor Company Molding a reinforced plastics component
EP3650197A1 (en) * 2018-11-06 2020-05-13 Uwe Beier Method and apparatus for forming flat substrates

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