Plastic sheet extruder combined with forming machine

Details Plastic sheet extruder combined with forming machine Plastic sheet extruder combined with forming machine

1977-12-19

1979-04-24

Lake, Roy

Plastic article or earthenware shaping or treating: apparatus

Control means responsive to or actuated by means sensing or...

Feed control of material en route to shaping area

425327, 425377, 425397, B29C 306, B29D 702

Patent

active

041509307

ABSTRACT:
Apparatus for forming articles from the thermoplastic sheet is combined with a plastic sheet extruder for the purpose of producing articles efficiently and economically. Such forming machine is operated intermittently and periodically while the extruder continuously extrudes the plastic sheet so that it is necessary to provide any countermeasure for settling the discrepancy to be caused in the sheet movement. The countermeasure is provided by making the extruder longitudinally movable so that when the forming machine is in its molding operation where the opposed two dies thereof are engaged the extruder is retracted so as to receive the extruded plastic sheet on the carrier extended between the two for supplying the length of the plastic sheet to the forming machine in its unoperated position where the opposed dies are separated for receiving said supply therebetween.

REFERENCES:
patent: 3456296 (1969-07-01), Schneider
patent: 3482279 (1969-12-01), Anders et al.
patent: 3883631 (1975-05-01), Murray
patent: 4086045 (1978-04-01), Thiel et al.

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