微孔薄膜挤出模计算机辅助设计

Computer-aided Design for Micro-capillary Film Extrusion Die

利用UG软件对微孔薄膜挤出模进行了分模块计算机辅助设计;各部分经过装配后可实现:聚合物熔体自上而下流过,熔体流动通道从输送段的圆棒形,经28°锲型收缩,渐变为成型段的1 mm×40 mm薄膜形。气体经气孔注入,途径薄壳状气室,以均匀的参数从8个微气体通道流出。在成型段熔体和气体汇合,形成了内部镶嵌一排平行排列的8孔Ф0.5 mm气体通道的微孔薄膜。

Using UG software, micro-capillary film extrusion die was divided into modules in computer aided design. Each part of the die was assembled to one unite so that polymer melt could flow from top to bottom in the die as follows： the melt flows through bar-shaped channel firstly, then through conveying section which with 28° wedge-type contraction, finally through forming section with the slit size of 1 mm×40 mm. High pressure gas is injected into the thin-shelled chamber and run from eight microchannels at uniform parameters. Polymer melt and gas are converged in the forming section, then the microporous membrane was manufactured, which is embedded with a row of parallel aligned eight microchannels with a diameter 0. 5 mm.