基于振动控制剪切减薄和定向的塑料智能加工

J. Ibar
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引用次数: 2

摘要

本文介绍了塑料成型过程中的熔体振动技术(特别是低频振动),以降低粘度,提高可加工性,并产生定向效益。用剪切减薄准则解释了振动频率和振幅对熔体粘度的影响。还回顾了压力、温度和冷却速度对剪切减薄的影响,以预测这些变量对熔体振动的干扰。建议将其应用于不易加工的塑料熔体(如茂金属聚烯烃)的注塑、挤出和吹塑。
本文章由计算机程序翻译,如有差异,请以英文原文为准。
Smart Processing of Plastics Through Vibration Controlled Shear-Thinning and Orientation
This paper covers the technology of melt vibration during the molding of plastic material (more specifically at low frequency) to reduce the viscosity and ease processability and to produce orientation benefits. The effect of vibration frequency and amplitude on melt viscosity is explained in terms of shear-thinning criteria. The effect of pressure, temperature and cooling rate on shear-thinning is also reviewed to predict how these variables interfere with melt vibration. Applications to injection molding, extrusion and blow molding of uneasily processable plastic melts (such as metallocenes polyolefins) are suggested.
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