Process and apparatus for two stage treatment of plastic materia

Details Process and apparatus for two stage treatment of plastic materia Process and apparatus for two stage treatment of plastic materia

1992-05-05

1994-08-16

Vargot, Mathieu

Agitating

Rubber or heavy plastic working

With specified vent means

159 3, 26421123, 26421124, 264349, 264102, 366 76, 366 91, 425190, 425203, 425204, 425205, 425208, 425209, B01F 724

Patent

active

053381122

ABSTRACT:
In the preparation and production of plastic materials by a continuously operating double shaft screw-type extruder, the efficiency of production often depends on good delivery of material to the extruder. In accordance with the invention for processing various types of plastic materials, a primary stage is mounted in a pressure-tight sealed manner on the housing of the extruder, the primary stage being formed by a vertical double conical container in which a pair of screw-type helices are rotatably supported and driven from above. The helices are connected to two replaceable feed elements at their lower ends so that delivery of material to the extruder is achieved without any intermediate dead spaces.

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patent: 4943402 (1990-07-01), Kafka et al.
patent: 5198171 (1993-03-01), Kasahara et al.
European Search Report EP 92 10 5669.
"Kunststoffmaschinenfuhrer" (Guide to Machines for Plastics) pp. 960 to 968, C. H. Verlag, Munich & Vienna, 2nd Edition.

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