The production of injection moulded components with low shrinkage and warpage is a constant challenge for manufacturers. The thermal design of the injection mould plays an important role for the achievable quality, especially the placement of the cooling channels. This design is usually based on empirical knowledge of the mould designers. The construction is supported iteratively by injection moulding simulations. In the case of thick-walled plastic optics with big wall thickness jumps, the shrinkage is compensated by injection compression moulding. In this process, the thin-walled areas freeze earlier and the necessary compression pressure introduces stresses into these areas which reduces the optical performance. An adapted cooling channel design can reduce these problems. At the IKV, Institute for Plastics Processing in Industry and Crafts at the RWTH Aachen University, a methodology was developed which inversely calculates the cooling requirement of the moulded part A demand-oriented cooling channel system is derived based on the computed results. The aim of the research projects is to minimise displacement and internal stresses by temperature control of the moulded parts according to the demand. In this paper, the methodology is applied to three different geometries, representing three classical parts for the injection moulding process. Three different quality areas in the mould for the inverse optimisation are defined and investigated. For each geometry the cooling channel designs are then validated in injection moulding simulations based on the results from the thermal optimisation. It can be shown that for different component geometries and thicknesses, different quality areas are advantageous and decrease the maximum warpage of the parts. For thin-walled ribbed components, a 2D approach leads to a 15% smaller displacement, for components with wall thickness jumps, all investigated quality ranges show no differences in displacement, but a surface in the middle of the part is preferred due to a 3 °C lower standard deviation of the temperature distribution.

具有低收缩率和翘曲的注塑成型部件的生产对于制造商来说是一个持续的挑战。注塑模具的热设计对于可达到的质量（尤其是冷却通道的放置）起着重要作用。这种设计通常基于模具设计者的经验知识。注塑仿真可反复支持该构造。对于壁厚跳变较大的厚壁塑料光学器件，收缩率可通过注射压缩成型来补偿。在此过程中，薄壁区域会更早冻结，并且必要的压缩压力会将应力引入这些区域，从而降低光学性能。合适的冷却通道设计可以减少这些问题。在IKV，亚琛工业大学工业与手工艺塑料加工研究所开发了一种方法，可反向计算成型零件的冷却需求。根据计算结果得出需求导向的冷却通道系统。研究项目的目的是通过根据需要对成型零件进行温度控制，以最大程度地减少位移和内部应力。在本文中，该方法应用于三种不同的几何形状，代表了注塑工艺的三个经典零件。定义并研究了模具中用于逆向优化的三个不同质量区域。然后针对每种几何形状，基于热优化的结果在注塑成型仿真中验证冷却通道的设计。可以看出，对于不同的部件几何形状和厚度，不同的质量区域是有利的，并且减小了部件的最大翘曲。对于薄壁带肋部件，二维方法可将位移减小15％，对于壁厚突变的部件，所有研究的质量范围均显示位移无差异，但由于3的缘故，优选零件中间的表面°C降低温度分布的标准偏差。