DIRECT PROCESSING OF A POLYMER WITH POWDERY ADDITIVES IN INJECTION-MOULDING MACHINES

摘要

In the method for processing a polymer in the form of granules or a powder with powdery additives in an injection-moulding machine which has a screw with a feed zone of constant screw core diameter, an intermediate zone having a compressing and metering section and with a mixing element arrangement, with a view to particularly cost-effective processing to produce high-quality mouldings it is provided that the polymer and the powdery additives are introduced without prior working-up directly into the feed zone of the screw and that, in the feed zone, the polymer is thoroughly mixed with the powdery additives at least twice by means of mixing element arrangements, the effective length of the screw for processing being at least 19 times the screw diameter. ……