HUT51959A - Method and apparatus for forming one- or multi-layer thermoplastic plates by using of pressure of vapours and/or gases
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Method and apparatus for forming one- or multi-layer thermoplastic plates by using of pressure of vapours and/or gases
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Publication number
HUT51959A
HUT51959AHU227687AHU227687AHUT51959AHU T51959 AHUT51959 AHU T51959AHU 227687 AHU227687 AHU 227687AHU 227687 AHU227687 AHU 227687AHU T51959 AHUT51959 AHU T51959A
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Application filed by Alkoto Ifjusag EgyesuelesfiledCriticalAlkoto Ifjusag Egyesueles
Priority to HU227687ApriorityCriticalpatent/HU204723B/en
Publication of HUT51959ApublicationCriticalpatent/HUT51959A/en
Publication of HU204723BpublicationCriticalpatent/HU204723B/en
Blow-Moulding Or Thermoforming Of Plastics Or The Like
(AREA)
Abstract
According to the proposed method the single or multi-layer sheet of thermo-plastic material is heated and forced onto the pattern by the application of vacuum. The pattern is also warmed and above-atmospheric pressure is applied to the outside of the sheet, while it is kept warm. The proposed equipment comprises primary space with a vacuum connection, heating element and pattern, closed off by the thermoplastic sheet. Secondary space formed by a pressure tight enclosure. It is provided with pressurising steam-gas connection and heating element.
HU227687A1987-05-211987-05-21Method and apparatus for forming thermoplastic plates of single- and multi-layer
HU204723B
(en)