Defined local influence on properties by injection moulding of thermoplastic micro-parts with dynamic temperature process control, Knowledge Transfer Project

在DFG研究小组702“Maschinen-，Werkzeug-und Prozessentwickung für Neue Verfahren zur Herstellung von Mikrobauteilenüber flüssige Phasen”的研究项目“Verarbeitungsbelastung and we kstoffliche Gebrauchstauglichkeit von spritzgegossenen Mikroelementen Mikroelement en Mikroelementen”中，可以确定工艺条件对热塑性微型件最终性能的基本影响。特别是，使用低导热模具材料的不同冷却条件有利于形态和由此产生的使用性能。由于高磨损和冷却条件的有限可控性，这些材料的应用受到限制。本项目的目的是利用有关影响材料行为的基本知识来研究注塑件中定义的局部形态发展。通过新型的模内集成分段回火元件(高性能加热陶瓷)，材料的冷却被局部影响，从而实现了零件性能的最大分级或工艺或几何相关影响的均质化。此外，项目中还研究了可实现的纵横比和定义结构的填充依赖复制的相互依赖关系。从项目中获得的知识到零件属性的局部影响，应该开发一个算法模型，使用与材料和工艺相关的输入参数来抽象局部期望的零件属性。将零件属性的影响值、相关性和局部效应的知识传递到演示部分。在此基础上，提出了微细零件动态回火模具及工艺设计的指导思想。

Within the research project " Verarbeitungsbelastung und werkstoffliche Gebrauchstauglichkeit von spritzgegossenen Mikroelementen" of the DFG Research Group 702 "Maschinen-, Werkzeug- und Prozessentwicklung für neue Verfahren zur Herstellung von Mikrobauteilen über flüssige Phasen" the basic influence of the process conditions on the resulting properties of thermoplastic micro parts could be identified. In particular, different cooling conditions using thermal low conductive mould materials favour the morphology and thus the resulting properties in use. Due to the high wear and the limited controllability of the cooling conditions the application of these materials is limited.The aim of the project is to use the fundamental knowledge about influences on the material be-haviour to investigate the defined local morphology development in injection moulded parts. By means of novel in the mould integrated segmented tempering elements (high performance heating ceramics) the cooling of the material is locally influenced so that either a maximum gradation of part properties or a homogenization of process or geometry-related influences is achieved. Furthermore, interdependencies with regard to the achievable aspect ratio and fill-dependent replication of defined structures are researched in the project.From the knowledge gained in the project to local influence of part properties an algorithmic model should be developed to enable an abstraction of locally expected part properties, using material and process-related input parameters. The knowledge on influencing values, interdependencies and local effects on part properties are transferred into demonstrator part. Furthermore, based on the research results guidelines for mould and process design for manufacturing of micro-components under dynamic mould tempering will be derived.