摘要
衣架式纺丝模头设计主要依靠测绘和经验,当形成系列化时往往设计依据不足。以非牛顿流体在圆管中的全展流动模型和在狭缝流道中的全展流动模型为理论基础,通过施加沿模头幅宽方向的流量分布均匀、所有流径上的压力降相等和停留时间相等的设计准则,建立模头熔腔的设计理论,确定了衣架式模头受力的计算方法,给出了熔腔设计方法并在新产品的开发设计和生产实际中得到应用,提高了熔体分配的均匀性,为衣架式模头的自主创新设计提供了有力的依据。
The coat-hanger die has been widely used in melt-spun nonwoven production line. Nevertheless it is lack of theoretical evidence for design. This paper provided the design theoretics of the die fluid channel based on the theories of fully developed flowing models with non-Newtonian fluid flowing in the circular conduit and in the slot, to realize uniformly distributed flux, equivalent pressure drop and equal retention time at the die exit across the die breadth. Besides, the calculating method of forces acting on the die was also upbuilt and the melt channel design was discussed too. The design theoretics, validated by the evidence that the fluid uniformity was considerably improved, provided forceful basis for the innovative design of coat-hanger die.
出处
《纺织学报》
EI
CAS
CSCD
北大核心
2008年第3期97-100,109,共5页
Journal of Textile Research
关键词
衣架式模头
设计理论
纺粘和熔喷法
非织造布
coat-hanger die
design theoretics
spun-bond and melt blowing process
nonwoven
