Direct compounding combines the continuous preparatory process with the cyclic, or discontinuous, injection-molding process. Everything involved in turning the individual components (polymer, colorizer, fillers, and so on) into a homogen melt takes place in a single heat. The co-rotating, intermeshing twin-screw extruder is never shut down during production, so the quality of the melt at the machine's nozzle always remains consistent. The constancy of the recipe is sustained for all individual components by a continuously operating gravimetric feeding system. This ''one heat'' process allows better material properties for a substantial lower price. Krauss-Maffei Munich has already sold machines for some of the applications outlined above, many others are at the quotation or initial testing stage. The echo from the market is above what were expected. At this time 50 % of the customers are from the automotive sector, where the driving force is the need to reduce material costs while at the same time improving component quality. The machine's main potential, however, is in enabling completely new applications for which injection molding has not been used in the past. Replacement within the pool of standard injection molding machines, therefore, will take place to no more than a minor extent, whereas these machines are poised to drive a market expansion for injection molding.
Two in one, inline compounding and injection molding
Zwei in Eins - Inline-Compoundieren und Spritzgießen
2002
4 Seiten, 7 Bilder
Aufsatz (Konferenz)
Englisch
SAE Technical Papers | 2002
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