WENGER, LAVON,SPELLMEIER, ALLAN C.,WILTZ, PHILIP B.
申请号：
CA3041092
公开号：
CA3041092A1
申请日:
2018.02.15
申请国别(地区):
CA
年份:
2018
代理人:
摘要：
High thermal transfer, hollow core extrusion screws (50, 52, 124, 126, 190) include elongated hollow core shafts (54, 128, 130, 192) equipped with helical flighting (56, 132, 134, 194) along the lengths thereof. The flighting (132, 134, 194) may also be of hollow construction which communicates with the hollow core shafts (54, 128, 130, 192). Structure (88, 90) is provided for delivery of heat exchange media (e.g., steam) into the hollow core shafts (54, 128, 130, 192) and the hollow flighting (132, 134, 194). The flighting (56, 132, 134, 194) also includes a forward, reverse pitch section (64, 162, 216). The extrusion screws (50, 52, 124, 126, 190) are designed to be used as complemental pairs as a part of twin screw processing devices (20), and are designed to impart high levels of thermal energy into materials being processed in the devices (20), without adding additional moisture.
