Method and apparatus for forming an article of pet material

Details Method and apparatus for forming an article of pet material Method and apparatus for forming an article of pet material

1994-04-22

1997-03-25

Timm, Catherine

Plastic and nonmetallic article shaping or treating: processes

Direct application of electrical or wave energy to work

Direct application of fluid pressure

264346, 264553, 264901, B29C 5110, B29C 5142

Patent

active

056141459

ABSTRACT:
A method and apparatus for forming an article from a sheet of PET material of thickness greater than 1 mm comprises heating the PET sheet to a preforming temperature of approximately 110.degree. C. by heaters, and then forming the sheet onto a heated vacuum mold. The sheet is retained in the mold by the vacuum and the surface of the sheet are maintained at a temperature of approximately 160.degree. C. by the mold and the heater, respectively, until the degree of crystallization of the sheet is in the order of 35%.

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