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luo gan pao guang ji jie gou she ji fang an ji cao zuo yao ling
Pages: 52
Year: Issue:  16
Journal: Farm Machinery

Abstract: <正> 1.概述塑料挤出机的锥形螺杆是挤出机的核心部件.其表面光洁程度直接影响物料的流动速度.因此要求螺杆的任何一处均需达到表面粗糙度要求.一般 Ra 为0.4以上。其表面粗糙度若达不到要求。易造成物料粘连在其表面.在高温下很快焦糊变黑。挤出型材表面会形成黑色纹理.直接影响制品质量甚至产生废品.因此螺杆表
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