Plasticating apparatus for molding devices

Details Plasticating apparatus for molding devices Plasticating apparatus for molding devices

B - Operations, Transporting

29

B

18/692

B29B 1/06 (1980.01)

Patent

CA 1163765

Abstract of the Disclosure A plasticating apparatus operates continuously to plasticate material which is delivered intermittently to a molding device, the plasticating apparatus including a first screw conveyor which rotates in a barrel, a backfeed passage within the first screw conveyor and a second screw conveyor in the backfeed passage arranged to recirculate ma- terial in a circuit extending back through the backfeed pas- sage. The first screw conveyor reciprocates axially so that during periods of non-delivery of plasticated material, the capacity of the circuit is increased to accommodate the accu- mulation of added plasticated material generated by the contin- uous rotation of the first screw conveyor.

375815

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