GB1242509A - Thermoforming of thermoplastic polymers - Google Patents

Thermoforming of thermoplastic polymers

Info

Publication number
GB1242509A
GB1242509A GB343471A GB343471A GB1242509A GB 1242509 A GB1242509 A GB 1242509A GB 343471 A GB343471 A GB 343471A GB 343471 A GB343471 A GB 343471A GB 1242509 A GB1242509 A GB 1242509A
Authority
GB
United Kingdom
Prior art keywords
sheeting
sheet
stack
electrodes
pairs
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
GB343471A
Inventor
Conrad Goldman
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 GB343471A priority Critical patent/GB1242509A/en
Publication of GB1242509A publication Critical patent/GB1242509A/en
Expired legal-status Critical Current

Links

Classifications

    • H—ELECTRICITY
    • H05—ELECTRIC TECHNIQUES NOT OTHERWISE PROVIDED FOR
    • H05B—ELECTRIC HEATING; ELECTRIC LIGHT SOURCES NOT OTHERWISE PROVIDED FOR; CIRCUIT ARRANGEMENTS FOR ELECTRIC LIGHT SOURCES, IN GENERAL
    • H05B6/00—Heating by electric, magnetic or electromagnetic fields
    • H05B6/46—Dielectric heating
    • H05B6/60—Arrangements for continuous movement of material

Landscapes

  • Physics & Mathematics (AREA)
  • Electromagnetism (AREA)
  • Blow-Moulding Or Thermoforming Of Plastics Or The Like (AREA)

Abstract

1,242,509. Heating sheet material before thermoforming. C. GOLDMAN. 13 May, 1968 [25 Jan., 1968], No. 3434/71. Divided out of 1,238,881. Heading B5A. [Also in Division H5] Thermoplastic sheeting is dielectrically heated, prior to thermoforming, by placing unheated pairs of sheets of flexible thermoplastic sheeting 1 and a carrier sheet 2 or release agent sheet at one end of a stack of such pairs between electrodes 3, 4, applying heat, and removing from the other end of the stack of pairs one pair 5, 6, for each heating cycle. With rigid thermoplastics sheeting, a carrier sheet is unnecessary, and the sheeting is heated to below its fusion point in the above apparatus, before further heating of the hottest sheet from the stack in a second dielectric heating unit. A single continuous flexible thermoplastic sheet 7 is analogously heated by simultaneously passing a multiplicity of layers thereof with suitable release sheeting, in alternating directions between the electrodes 8, 9, of the dielectric heating unit. An intermittent operation includes the step of compacting the stack of layers by reducing the gap between the electrodes, Fig. 2A (not shown). Specification 1,238,881 is referred to.
GB343471A 1968-01-25 1968-01-25 Thermoforming of thermoplastic polymers Expired GB1242509A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
GB343471A GB1242509A (en) 1968-01-25 1968-01-25 Thermoforming of thermoplastic polymers

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
GB343471A GB1242509A (en) 1968-01-25 1968-01-25 Thermoforming of thermoplastic polymers

Publications (1)

Publication Number Publication Date
GB1242509A true GB1242509A (en) 1971-08-11

Family

ID=9758270

Family Applications (1)

Application Number Title Priority Date Filing Date
GB343471A Expired GB1242509A (en) 1968-01-25 1968-01-25 Thermoforming of thermoplastic polymers

Country Status (1)

Country Link
GB (1) GB1242509A (en)

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4288399A (en) 1977-08-17 1981-09-08 Phillips Petroleum Company Process for low pressure molding thermoplastic elastomer compositions
WO2002014050A2 (en) * 2000-08-11 2002-02-21 Visteon Global Technologies, Inc. High volume production of low permeation plastic fuel tanks using parallel offset twinsheet pressure forming
CN115480596A (en) * 2022-07-19 2022-12-16 广东省科学院智能制造研究所 Method and system for zone temperature control in thermoplastic molding

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4288399A (en) 1977-08-17 1981-09-08 Phillips Petroleum Company Process for low pressure molding thermoplastic elastomer compositions
WO2002014050A2 (en) * 2000-08-11 2002-02-21 Visteon Global Technologies, Inc. High volume production of low permeation plastic fuel tanks using parallel offset twinsheet pressure forming
WO2002014050A3 (en) * 2000-08-11 2002-05-02 Visteon Global Tech Inc High volume production of low permeation plastic fuel tanks using parallel offset twinsheet pressure forming
US6969485B2 (en) 2000-08-11 2005-11-29 Visteon Global Technologies, Inc. High volume production of low permeation plastic fuel tanks using parallel offset twinsheet pressure forming
CN115480596A (en) * 2022-07-19 2022-12-16 广东省科学院智能制造研究所 Method and system for zone temperature control in thermoplastic molding

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