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“机械、加工、加工和加工”的研究项目“Verarbeitungsbelastung und werkstoffliche Gebrauchstauglichkeit von spritzgegossenen microelementen”中，可以确定工艺条件对热塑性微部件最终性能的基本影响。特别是，不同的冷却条件下使用导热低导模具材料有利于形态，从而在使用中产生的性能。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。该项目的目的是利用对材料行为影响的基本知识来研究注塑件中定义的局部形态发展。通过在模具中集成的新型分段回火元件（高性能加热陶瓷），材料的冷却受到局部影响，从而实现零件性能的最大梯度或过程或几何相关影响的均匀化。此外，该项目还研究了可实现的纵横比和定义结构的填充相关复制的相互依赖性。从项目中获得的知识到零件特性的局部影响，应开发一种算法模型，以便使用与材料和工艺相关的输入参数，对局部期望的零件特性进行抽象。将零件性能的影响值、相互依赖关系和局部效应等知识传递给演示零件。在此基础上，提出了微部件动态回火工艺的模具和工艺设计准则。

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.