Claims
- 1. A method of forming a plastic article in an injection molding machine of the type having a screw that reciprocates and rotates in a barrel said method comprising the steps of:
- (1) Introducing unmelted plastic material into the injection molding machine;
- (2) partially and incompletely plasticizing said material by the rotary action of the screw;
- (3) prior to complete plasticization of the plastic material, stratifying said material by moving the plastic material from the rotary screw to a heating zone comprising a plurality of elongated stratified passageways which extend substantially continuously for the entire length of said heating zone;
- (4) heating said material in said stratified passageways by conduction to totally plasticize the plastic material without mixing; and
- (5) injecting the plasticized material into a closed mold.
- 2. The method as claimed in claim 1 including introducing a plurality of different colored plastic material into said machine to thereby provide a plastic article having a mottled appearance.
- 3. The method as claimed in claim 2 further including forcing the plasticized material into the mold with a partially and incompletely plasticized material.
- 4. The method as claimed in claim 1 further including providing elongated fine filaments in said injection molding machine along with said plastic material.
- 5. The method as claimed in claim 4 wherein said elongated fine filaments comprise fine wire elements.
BACKGROUND OF THE INVENTION
This application is a continuation-in-part of my co-pending application, Ser. No. 738,460, filed on Nov. 3, 1976, now abandoned, which was a divisional of my prior application, Ser. No. 635,791, filed on Nov. 28, 1975, now U.S. Pat. No. 4,015,916.
US Referenced Citations (5)
Divisions (1)
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Number |
Date |
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Parent |
635791 |
Nov 1975 |
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Continuation in Parts (1)
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Number |
Date |
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Parent |
738460 |
Nov 1976 |
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