UPVC低发泡挤出制品内空缺陷的产生原因与解决措施  

The cause of hollow defect in low foam UPVC extrusion product and corresponding solutions

作　　者：查安平 

机构地区：[1]铜陵格瑞特挤出技术有限公司,安徽铜陵244000

出　　处：《模具工业》2014年第8期54-57,共4页Die & Mould Industry

摘　　要：阐述了UPVC低发泡挤出制品内空缺陷的产生原因与解决措施,指出在UPVC低发泡挤出成型中,原料配方的配制及混合工艺、挤出设备及工艺参数设计的合理性,是消除制品内空缺陷的基本条件;而在挤出成型模设计中,发泡倍率的设计、模口缝隙形状与排布、挤出流道内的熔体压力控制等技术参数,是消除制品内空缺陷的关键。The cause of hollow defect in low foam UPVC extrusion product and corresponding solutions were presented. It is pointed that the preparation of raw materials formula, mixing process, extrusion equipment and design of process parameters are the basic condition to eliminate the hollow defect; while foaming ratio, the shape and layout of die in extrusion flow pass is the key point. the extrusion die design such as the design of orifice gap and the control of the melt pressure

关 键 词：UPVC低发泡 内空缺陷 发泡倍率 模口缝隙 熔体压力 

分 类 号：TG241[金属学及工艺—铸造]