Apparatus involving a centerplate and a heat sink between multip

Details Apparatus involving a centerplate and a heat sink between multip Apparatus involving a centerplate and a heat sink between multip

1974-01-22

1976-03-02

Shore, Ronald J.

Plastic article or earthenware shaping or treating: apparatus

Means providing a shaping orifice

Plural distinct feed inlets

425379R, 425466, B29D 702, B29F 308

Patent

active

039415511

ABSTRACT:
A dual outlet extrusion flat film die assembly for various thermo-extrudable materials includes split manifold chambers separated from each other by a rigid centerplate. Each portion of the die in the direction behind the flow materials includes a heat sink slot behind the manifold. Each manifold tapers toward its own die mouth; has separate melt inlets adapted for center, top or end feed operations; has separate pre-land and final land surfaces leading to individual outlet openings for precise control of melt flow; and has separate heat control means allowing precise temperature control for each melt as it flows throughout the die. Temperature differentials ranging from O.degree. to 200.degree.F. are obtainable between the extruded layers. A differential push-pull adjustment system for each movable lip of each outlet opening includes opposed alternatingly staggered thimble bolts to precise control of each individual layer profile.

REFERENCES:
patent: 2718661 (1955-09-01), Russell
patent: 3382537 (1968-05-01), Tigher
patent: 3462332 (1969-08-01), Goto
patent: 3516886 (1970-06-01), Quackenbush et al.
patent: 3640659 (1972-02-01), Dimitrov
patent: 3829274 (1974-08-01), Melead

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