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New Wave-Screw Concepts in High-Speed Extruder.

高速挤出机中的新型波形螺杆概念。

基本信息

批准号：
333380752
负责人：
Professor Dr.-Ing. Volker Schöppner
金额：
--
依托单位：
Fachgebiet Kunststoffverarbeitung
依托单位国家：
德国
项目类别：
Research Grants
财政年份：
2017
资助国家：
德国
起止时间：
2016-12-31 至 2019-12-31
项目状态：
已结题

来源：
https://gepris.dfg.de/gepris/projekt/333380752?language=en
关键词：
New Wave Screw Concepts Speed

项目摘要

Research Project Contents:Single-screw extruders are indisputably the most important machines in the polymer processing industry. During plasticating extrusion, polymer is fed to the extruder in the solid-state and the material is melted as it is conveyed by the rotating extruder screw from the feed port to the die. Based on the economic framework, the primary objective of machine manufacturers is to increase the output capacity while guaranteeing high melt quality. Meeting these demands requires proper screw design and thus a thorough understanding of the transport phenomena governing the extrusion process. Focusing on solid bed breaking screw concepts, this research project will investigate wave- and energy-transfer-sections in detail placing special emphasis on their application in the melting zone of high-speed single-screw extruders. In order to take advantage of their great potential to combine both high output rates and excellent melt quality, new design strategies based on mathematical-physical models will be developed and validated by experimental studies carried out on fast running single-screw extruders. This will yield a sustainable contribution for the development of high-speed extrusion concepts in combination with solid bed breaking screw sections.Hypothesis:The research work will provide mathematical-physical process models needed to optimize wave- and energy-transfer-sections in the melting zone of high-speed single-screw extruders. This will help to meet the high demands made on the single-screw extruder regarding output capacity and melt quality.Methods:Experimental studies will be carried out on both a novel screw simulator allowing the detailed analysis of the melting process in solid bed breaking flow channels and on a conventional as well as a grooved feed high-speed single-screw extruder. To extend existing process models, analytical as well as numerical methods will be applied comprising the network theory and the finite volume method in particular. Innovation and novelty:The few scientific papers dealing with the above mentioned topic still leave many questions unanswered and show that the contents of this proposal are highly relevant. Previous studies have proven that increased output rates caused by an early breaking of the solid bed in high-speed extrusion can be combined with the high requirements in terms of melt quality. Especially the application of wave- and energy-transfer-sections in the melting zone is of high interest, as these zones show the potential to induce solid bed breaking. However, as wave- or energy-transfer-zones are usually found in the melt conveying zone, their application in the melting zone requires new design strategies based on mathematical-physical process models.

研究项目内容：单螺杆挤出机是聚合物加工行业中最重要的机械设备。在塑化挤出过程中，聚合物以固态进料到挤出机中，当材料通过旋转的挤出机螺杆从进料口输送到模头时，材料熔化。基于经济框架，机器制造商的主要目标是在保证高熔体质量的同时提高产量。满足这些要求需要适当的螺杆设计，从而彻底了解控制挤出过程的传输现象。该研究项目将重点关注固体床破碎螺杆的概念，详细研究波和能量传递部分，特别强调它们在高速单螺杆挤出机熔融区的应用。为了充分利用联合收割机的巨大潜力，将高产量和优异的熔体质量结合起来，将开发基于物理物理模型的新设计策略，并通过在快速运行的单螺杆挤出机上进行的实验研究进行验证。这将为高速挤出概念与固体床破碎螺杆部分相结合的发展做出可持续的贡献。假设：研究工作将提供优化高速单螺杆挤出机熔融区中的波和能量传递部分所需的数学物理过程模型。这将有助于满足高要求的单螺杆挤出机的输出能力和熔体quality.Methods：实验研究将进行一种新的螺杆模拟器，允许在固体床破碎流动通道的熔融过程的详细分析，以及在常规的和开槽饲料高速单螺杆挤出机。为了扩展现有的过程模型，分析以及数值方法将应用包括网络理论和有限体积法，特别是。创新性和新奇：涉及上述主题的少数科学论文仍然留下许多问题没有回答，并表明该提案的内容具有高度相关性。先前的研究已经证明，高速挤出中固体床的早期破裂所引起的产量增加可以与熔体质量方面的高要求相结合。特别是在熔化区中的波和能量传递部分的应用是高度感兴趣的，因为这些区域显示出诱导固体床破碎的潜力。然而，由于波或能量传递区通常在熔体输送区中发现，它们在熔化区中的应用需要基于物理过程模型的新的设计策略。