Process for producing hollow bodies of oriented thermoplastic ma

Details Process for producing hollow bodies of oriented thermoplastic ma Process for producing hollow bodies of oriented thermoplastic ma

1987-12-04

1990-01-16

Silbaugh, Jan H.

Plastic and nonmetallic article shaping or treating: processes

Direct application of fluid pressure differential to...

Differential temperature conditioning

264292, 264296, 264533, 264320, 264322, 425393, 425398, 425400, 425525, 425526, B29C 5522, B29C 5700, B29C 5308, B29C 4964

Patent

active

048941980

ABSTRACT:
In a process for producing hollow bodies of oriented thermoplastic material, a hollow blank having a bottom portion and a substantially cylindrical wall portion with an opening at its end remote from its bottom portion is subjected to pre-expansion in the region of the opening and then thermofixing in a subsequent treatment step. The thermofixing operation may be preceded by a mechanical expansion operation for orienting the plastic material forming the wall portion of the blank.

REFERENCES:
patent: 4412966 (1983-11-01), Yoshino et al.
patent: 4704243 (1987-11-01), Nilsson et al.

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