WEHRLE, KARINA,ABBOTT, CHRISTOPHER,NABAVI, KAMYAR,GIBBS, PETER
申请号：
CA2692452
公开号：
CA2692452C
申请日:
2008.07.03
申请国别(地区):
CA
年份:
2016
代理人:
摘要：
An extruder (10) comprises a barrel (12) and a screw (24) mounted in thebarrel for rotation. The screw comprisesscrew threads (26a, 26b, 26c). The barrel has an inlet funnel (22) toward oneend for material to be extruded and a die plate (18)with openings (20) at the other end and an air inlet port (28) toward one endof the barrel and an air outlet port (30) toward the otherend. The screw threads are such that material (34) in the barrel is moved morequickly along the portion of the barrel between the airinlet port and the air outlet port than upstream of that portion. The airoutlet is connected to a pump (32) so that there is a pressuredifference between the air inlet and the air outlet.
