Blow-molding press

Plastic article or earthenware shaping or treating: apparatus – Female mold and means to shape parison directly by internal... – Including means to close or lock blow mold

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4254515, B29C 4956

Patent

active

057119740

ABSTRACT:
The invention concerns a press for blow-molding. This press (10) comprises a frame (11) on which there are mounted two movable plates (12, 13), each supported a half-mold (14, 15) and actuated by a mechanism for opening and closing the mold, which is formed of the two half-molds. Each of the movable plates is attached to a beam mounted on two axles (19, 20) so that it slides along these axles in opposite directions. The opening mechanism essentially consists of an actuator, two transmission blocks (29) and two pairs of connecting rods (33) connected to said movable plates. When the actuator drives the transmission blocks (29) in the direction of arrow A, the rods cause the mold to close. When the transmission block turns in the direction of arrow B, displacement of the rods causes the mold to open. The invention has applications for high speed molding presses in which the mold must be opened in rapid cycles.

REFERENCES:
patent: 3501809 (1970-03-01), Kinsley
patent: 3749541 (1973-07-01), Mehnert
patent: 3860375 (1975-01-01), Kinslow, Jr. et al.
patent: 3989437 (1976-11-01), Kiefer et al.
patent: 4878828 (1989-11-01), Wollsclager et al.
patent: 5388981 (1995-02-01), Scharrenbroich
Patent Abstracts of Japan, vol. 95, No. 002 of JP-A-07 032366 (Tahara:KK), Feb. 3, 1995.

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