Apparatus for the extrusion of patterned sheets or panels of thermoplastic synthetic resin compositions
First Claim
1. An apparatus for the extrusion of patterned sheets or panels of a basic color thermoplastic resin composition having at least one additional colored thermoplastic resin composition therein, comprising:
- (a) a long-slot extruder head for extruding the patterned sheets or panels, said extruder head having inlet means for introducing said basic color thermoplastic resin composition to the extruder head, said extruder head having an initial flow zone therein, said initial flow zone being downstream, in the direction of flow of the basic color thermoplastic resin composition through the extruder head, from said inlet means for introducing said basic color composition to the extruder head,(b) means for adding at least one additional color thermoplastic resin composition to said basic color composition, said means being positioned to feed directly into said initial flow zone and comprising at least one feed channel, said at least one feed channel being constructed on a support that is insertable in the walls of the long-slot extruder head and is exchangeable, and(c) a long-slot extrusion die in flow communication with said at least one feed channel for feeding said at least one additional colored thermoplastic resin composition to said at least one feed channel.
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Abstract
A process for extruding patterned sheets or panels of differently colored thermoplastic synthetic resin compositions which include the steps of distributing additional color compositions outside of an extrusion duct of a basic color composition over a number of individual feed channels and introducing the additional color compositions at right angles to the direction of flow of the basic color composition into the interior of the stream of the basic color composition at locations over the width and thickness in an initial flow zone via said channels.
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Citations
15 Claims
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1. An apparatus for the extrusion of patterned sheets or panels of a basic color thermoplastic resin composition having at least one additional colored thermoplastic resin composition therein, comprising:
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(a) a long-slot extruder head for extruding the patterned sheets or panels, said extruder head having inlet means for introducing said basic color thermoplastic resin composition to the extruder head, said extruder head having an initial flow zone therein, said initial flow zone being downstream, in the direction of flow of the basic color thermoplastic resin composition through the extruder head, from said inlet means for introducing said basic color composition to the extruder head, (b) means for adding at least one additional color thermoplastic resin composition to said basic color composition, said means being positioned to feed directly into said initial flow zone and comprising at least one feed channel, said at least one feed channel being constructed on a support that is insertable in the walls of the long-slot extruder head and is exchangeable, and (c) a long-slot extrusion die in flow communication with said at least one feed channel for feeding said at least one additional colored thermoplastic resin composition to said at least one feed channel. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13)
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14. An apparatus for the extrusion of patterned sheets or panels of a basic color thermoplastic resin composition having at least one additional colored thermoplastic resin composition therein, comprising:
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(a) extruder head means for extruding the patterned sheets or panels, said extruder head means having inlet means for introducing said basic color thermoplastic resin composition to the extruder head, said extruder head means having an initial flow zone therein, said initial flow zone being downstream, in the direction of flow of the basic color thermoplastic resin composition through the extruder head means, from the inlet means for introducing said basic color composition to said head means, (b) means for adding at least one additional color thermoplastic resin composition to said basic color composition, said means being positioned to feed directly into said initial flow zone and comprising a plurality of feed channels, said plurality of feed channels being constructed on a support that is insertable in the walls of the long-slot extruder head and is exchangeable, and (c) extrusion die means, in flow communication with said plurality of feed channels, for uniformly feeding said at least one additional colored thermoplastic resin composition to all of said plurality of feed channels. - View Dependent Claims (15)
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Specification