Blow molding machine

Details Blow molding machine Blow molding machine

1978-03-20

1981-02-03

Silbaugh, Jan H.

Plastic article or earthenware shaping or treating: apparatus

Female mold and means to shape parison directly by internal...

Including means to prepare parison

264542, 425532, 425541, 425451, 4254513, B29C 1707

Patent

active

042485827

ABSTRACT:
A blow molding machine for the manufacture of products such as bottles from a continuously extruded parison of plastic material. Two pairs of horizontally reciprocable mold sections are shown which alternately take a parison from a central station and transport it to either of two blow molding stations having vertically movable blow pins. The mold section platens carry laterally extending trimming elements and, when each pair of mold sections returns to retrieve another parison, the trimming elements trim flash from the molded product which hangs from the blow pin. The product is then transported to a delivery station by the trimming elements as the mold sections return to the blow molding station. The platens and blow pin stations are all supported by a vertically reciprocable table. As a knife severs the parison held by a pair or mold sections from the extruder and the mold sections start moving toward the mold station, the table lowers to prevent resticking of the material being continuously extruded. One of the platens has four tie bars secured thereto, all of which are below the level of the mold sections, the other ends of these bars carrying a force transfer plate. A reciprocable fluid motor is mounted between the other platen and said plate, the cylinder end of the motor being secured to the platen. A rack and pinion arrangement insures equal movement of the two mold sections.

REFERENCES:
patent: 3081489 (1963-03-01), Jackson et al.
patent: 3235907 (1966-02-01), Harwood et al.
patent: 3681486 (1972-08-01), Mehnert
patent: 3718724 (1973-02-01), Holzmann et al.
patent: 3749541 (1973-07-01), Mehnert
patent: 3790318 (1974-02-01), Marfiewicz
patent: 3883286 (1975-05-01), Kinslow, Jr. et al.
patent: 3964852 (1976-06-01), Marfiewicz

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