Method for crystallizing thermoplastic material

Details Method for crystallizing thermoplastic material Method for crystallizing thermoplastic material

B - Operations, Transporting

29

C

18/1111

B29C 71/00 (2006.01) B29C 43/52 (2006.01) B29C 57/00 (2006.01) B29C 71/02 (2006.01)

Patent

CA 1324870

ABSTRACT Crystallizable mainly amorphous thermoplastic material is crystallized at a temperature exceeding the glass transition temperature of the material by subjecting the material at the elevated temperature to compressive forces. The material thickness as a rule is reduced by at least 20%, preferably by at least 40%. To achieve this, a plunger and a mold are moved to a minimum distance at which the thermoplastic material located between the plunger and the mold part is subjected to compressive forces. The plunger and/or the mold part are provided with elements for the setting and maintaining of a temperature specified in advance of the surfaces by which the plunger and the mold part respectively abut against the thermoplastic material.

561661

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