Method and apparatus for making an object of a plastic material

Plastic and nonmetallic article shaping or treating: processes – Direct application of fluid pressure differential to... – Including application of internal fluid pressure to hollow...

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264533, 264540, 425525, 425530, 425532, B29C 4918

Patent

active

060745967

ABSTRACT:
The apparatus has means (10, 11) for placing a parison (12) between two portions of a blow mold (14, 16). The parison (12) is put on the head of a blowpipe (32) placed between the two mold portions. On closing the mold, the top end of the parison is pinched in a top region of the mold and the bottom end of the parison is clamped against the blowpipe (32). A pre-blow step is performed on the parison to obtain an envelope which is then turned over by moving the blowpipe (32) upwards together with a turnover piston (34, 36), prior to performing a final blow step.

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patent: 4348167 (1982-09-01), Virog, Jr.
patent: 4510116 (1985-04-01), Peters et al.
patent: 4529570 (1985-07-01), Przytulla
patent: 5052626 (1991-10-01), Wood et al.
patent: 5253996 (1993-10-01), Moore
patent: 5466413 (1995-11-01), Richter et al.
patent: 5571474 (1996-11-01), Przytulla

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