What's the Importance Of Screw Design
Since the heating rate, feed rate, and other integral extrusion factors are directly dependent on the only moving part in the plastic extruder—the screw—carefully consideration of the size and design of this component is necessary. Calculation of screw diameter and length is based on the melting rate, size of the resin, type of raw plastic, and amount of pressure required maintaining uniformity. For applications where materials are compounded within the barrel of the extruder, a twin-screw design may be used to enable adequate mixing.
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