Plastics compounding appts. - has axially displaceable screw having exchangeable shearing section

The compounding barrel has, in the region of the tip of the screw, a dia. that is greater than the nominal dia. of the screw. The screw tip is provided with a pref. exchangeable, cylindrical, conical or longitudinally profiled, shearing section. A shearing slot of increasing length forms during the...

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Bibliographische Detailangaben
1. Verfasser:	KOHLER,RUDOLF
Format:	Patent
Sprache:	eng ; ger
Schlagworte:	AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING PERFORMING OPERATIONS SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDEDFOR SHAPING OR JOINING OF PLASTICS TRANSPORTING WORKING OF PLASTICS WORKING OF SUBSTANCES IN A PLASTIC STATE, IN GENERAL
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Beschreibung
Zusammenfassung:	The compounding barrel has, in the region of the tip of the screw, a dia. that is greater than the nominal dia. of the screw. The screw tip is provided with a pref. exchangeable, cylindrical, conical or longitudinally profiled, shearing section. A shearing slot of increasing length forms during the compounding operation. The plastics mass reaching the damming chamber is, therefore, subjected to increasing shearing heating whereby a possible cooling of the temp. of the mass is counteracted. Temp. gradients within the plastics mass are minimised so that the quality of the intended mouldings is not impaired.