Thermoforming method and apparatus for thermoplastic resin...

Details Thermoforming method and apparatus for thermoplastic resin... Thermoforming method and apparatus for thermoplastic resin...

B - Operations, Transporting

29

C

18/1062

B29C 51/10 (2006.01) B29B 13/02 (2006.01) B29C 51/18 (2006.01) B29C 51/42 (2006.01)

Patent

CA 1321460

THERMOFORMING METHOD AND APPARATUS FOR THERMOPLASTIC RESIN SHEET ABSTRACT OF THE DISCLOSURE A thermoforming apparatus for a thermoplastic resin sheet which comprises a sheet heating section including a set of upper and lower heating plates having a surface roughness of 2S or less, a plurality of vacuum thin bores provided at least in the upper heating plate and a vacuum system communicating with said vacuum thin bores, and a sheet forming section disposed downstream of the sheet heating section. The apparatus is used to effect the thermoforming of a thermoplastic resin sheet, in which the thermoplastic resin sheet is heated between the heating plates, while being sucked at least by the upper heating plate, being allowed to closely contact with the plate, and thereafter the sheet is quickly sent to the sheet forming section to be formed there.

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