APPARATUS FOR THE CONTROLLED EXTRUSION OF MULTI-COMPONENT SYNTHETIC RESINOUS BODIES
First Claim
1. An apparatus for the simultaneous extrusion of at least two diverse synthetic resinous materials into a layered composite body, the apparatus comprising a first heat plastified synthetic resinous material supply means adapted to deliver a first heat plastified stream, a second heat plastified synthetic resinous material supply means adapted to deliver a second heat plastified stream, means to divide the first stream and means to divide the second stream into a plurality of substreams, each means having an entrance and an exit, means to recombine the substreams in a desired relationship into a composite layered stream, means to deform the composite layered stream into a desired configuration, the improvement which comprises stream shearing means for selectively applying a shearing force, by continual mechanical motion of a surface of said stream shearing means in contact with a stream, wherein the stream shearing means comprises at least one moveable body positioned adjacent to, and in spaced relationship to the entrance of a dividing means.
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Accused Products
Abstract
In extrusion of layered film where a layered stream is discharged from a single die, control of the volume of material passing through the feed ports is obtained by introducing varying mechanical shear rates to at least a portion of the individual layers of the composite stream.
70 Citations
4 Claims
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1. An apparatus for the simultaneous extrusion of at least two diverse synthetic resinous materials into a layered composite body, the apparatus comprising a first heat plastified synthetic resinous material supply means adapted to deliver a first heat plastified stream, a second heat plastified synthetic resinous material supply means adapted to deliver a second heat plastified stream, means to divide the first stream and means to divide the second stream into a plurality of substreams, each means having an entrance and an exit, means to recombine the substreams in a desired relationship into a composite layered stream, means to deform the composite layered stream into a desired configuration, the improvement which comprises stream shearing means for selectively applying a shearing force, by continual mechanical motion of a surface of said stream shearing means in contact with a stream, wherein the stream shearing means comprises at least one moveable body positioned adjacent to, and in spaced relationship to the entrance of a dividing means.
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2. The apparatus of claim 1 wherein the means to selectively apply a shearing force comprises at least one rotating element.
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3. The apparatus of claim 1 wherein the means to selectively apply a shearing force is a reciprocating element.
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4. The apparatus of claim 1 wherein the means to deform the composite stream into a desired configuration comprises a housing defining a passageway, the passageway having an entrance portion and a discharge portion, the entrance and discharge portions being of elongate cross-sectional configuration and the cross-sectional configurations lying in planes generally normal to the axis of the passageway, the longitudinal axis of the entrance and discharge cross-sectional configurations being disposed in planes generally normal to each other and containing a longitudinal axis of the passageway.
Specification