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Evaluation of the Melting Behavior and the Melt Penetration into the Solid Bed Using a Model Experiment

机译：使用模型实验评估熔化行为和熔融渗透到固体床中的熔体渗透

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This work deals with the melting of polymeric bulk materials and the melt penetration into the solid bed utilizing a model experiment that simulates the melting process in single screw plasticating units. The polymer granules are pressed onto a heated rotating shaft. The thickness distribution of the resulting melt film is measured according to the principle of optical triangulation (light intersection). This new method and the measurement of the bulk density using a piston position measurement were presented earlier by the authors. The combination of these different principles allows the determination of the melt penetration into the solid bulk as it takes place in the delay zone of single screw plasticating units. The melting behavior of spheroidal and cylindrical shaped polypropylene-homopolymer (PP-H) bulk solids is analyzed at different applied pressure. Spheroidal bulk solids show significant advantages compared to cylindrical shaped granules which melt much slower, particularly at higher pressures. The melt clearly penetrates deeper into the spheroidal bulk compared to cylindrical bulk.
机译：该工作涉及聚合物散装材料的熔化和利用模型实验，熔融渗透到固体床中，该模型实验在单螺杆塑化单元中模拟熔化过程。将聚合物颗粒压在加热的旋转轴上。根据光三角测量的原理（光交叉点）测量所得熔体膜的厚度分布。作者呈现了使用活塞位置测量的新方法和堆积密度的测量。这些不同原理的组合允许在单螺杆塑化单元的延迟区中确定熔体渗透到固体块中。在不同施加压力下分析了球形和圆柱形聚丙烯 - 均聚物（PP-H）批量固体的熔化行为。与圆柱形颗粒相比，球体散装固体显示出显着的优点，颗粒状颗粒较慢，特别是在更高的压力下。与圆柱体散装相比，熔体显然深入进入球体散装。

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