Apparatus for the continuous formation of biaxially oriented the

Details Apparatus for the continuous formation of biaxially oriented the Apparatus for the continuous formation of biaxially oriented the

1980-05-29

1983-05-24

Woo, Jay H.

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, 425346, 425363, B28B 1700

Patent

active

043848362

ABSTRACT:
An apparatus for continuously extruding, biaxially orienting and intermittently forming molded products from a web of thermoplastic material and further, continuously separating the products from the web selvage, stacking and handling the products and recycling the web selvage for further extrusion. The apparatus uses intermittent molding devices into which configuration the biaxially oriented web is interfaced by a continuous-to-intermittent interfacing structure which preserves the dimensional and orientational integrity of the web and maintains thermal stability therein. An undulating peripheral surface on a dynamic storage or accumulator drum and associated transfer rollers cooperate with intermittently advanced feed belts in timed relationship with a reciprocating forming press to effectuate the interface and product forming portions of the process. In some of the preferred embodiments the inertia at the interface between the undulating peripheral surface of the accumulator drum and the biaxial orientation apparatus is reduced to an optimal minimum.

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