High-precision optics by application-optimized compression induced solidification (CIS)

通过应用优化的压缩诱导凝固 (CIS) 实现高精度光学器件

基本信息

批准号：
290812922
负责人：
Professor Dr.-Ing. Dietmar Drummer
金额：
--
依托单位：
Lehrstuhl für Kunststofftechnik (LKT)
依托单位国家：
德国
项目类别：
Research Grants (Transfer Project)
财政年份：
2016
资助国家：
德国
起止时间：
2015-12-31 至 2019-12-31
项目状态：
已结题

来源：
https://gepris.dfg.de/gepris/projekt/290812922?language=en
关键词：
precision optics application optimized compression

项目摘要

The processing technique Compression Induced Solidification (CIS), which was developed at the Institute of Polymer Technology, facilitates obviating problems with standard plastic processing like sink marks, residual stresses and warpage, which arise while the polymer melt undergoes a two phase cooling. The CIS process is possible because the glass transition temperature range of amorphous plastics is pressure dependent and shifts to higher temperatures with increasing pressure. Thus, the plastic can first be solidified at higher temperatures by applying pressure within the cavity, regardless of thickness, and then cooled as a solid. The DFG funded projects "Grundlegende Betrachtungen zum Einfluss hoher Drücke auf den Phasenübergang bei der Kunststoffverarbeitung" and "Übertragung der Grundlagen auf die Spritzgießvariante Druckverfestigung" have expounded upon the fundamental understanding of amorphous thermoplastic materials and shown the great potential behind CIS by producing precise and homogeneous parts. With the fabrication of experimental mold CIS was able to be integrated into automated injection molding processes. Yet, despite this progress the current cycle time is too long to be able to employ CIS for industrial purposes in its current state. Additionally, the mold technology behind the trial mold remains too complicated and expensive for further industrial applications. The purpose of the transfer project "High precision optics by application-optimized, compression induced solidification" is, therefore, to reduce CIS cycle time with innovative approaches. Additionally, the mold and process control concepts will be improved upon and simplified to further facilitate the implementation of CIS into existing processing frameworks. Numerous points meriting scientific research arise from the aim to reduce CIS cycle time. Firstly, the compression speeds effect on the components volume and physical aging remains insufficiently described. This is particular important for components employed at higher temperatures. Another important point is the varying melt temperatures effect on the component properties in the cavity during compression. This effect is directly related to the pressure dependent viscosity of polymer melts, which is to be analyzed with the novel scientific equipment 'Gegendruckviskosimeter'. Furthermore, the exact impression of microstructures is also very promising for thick walled components, because of the high cavity pressures as determined by the process itself. With the production of a specimen 'disc' the aforementioned points can be scientifically and empirically researched. A component 'lens' practically demonstrates the capability of economically producing high precision plastic optics with the innovative method of CIS.

在聚合物技术研究所开发的加工技术压缩诱导的固化（CIS）促进了在标准塑料处理（如水槽标记，残留应力和翘曲）中的明显问题，而聚合物融化的过程会融化两相冷却。顺式过程是可能的，因为无定形塑料的玻璃过渡温度范围取决于压力，并且随着压力的增加而转移到更高的温度。这样，无论厚度如何，塑料都可以通过在腔内施加压力在较高的温度下固化，然后将其冷却为固体。 DFG资助的项目“ Grundlegende betrachtungen zum einflusshoherdrückeauf denphasenübergang”和“ grundandstoff verarabetungen diespritzgießvariantedruckverfestigung”越来越多地构成了对不斑点的热塑料的基础，并以CIS的形式构成了CIS的基础，并以CIS的形式构成了CIS的基础。随着实验模具的制造，CIS能够集成到自动注射成型过程中。然而，随之而来的是当前周期时间太长，无法在其当前状态下将CI用于工业目的。此外，试验模具背后的霉菌技术对于进一步的工业应用仍然太复杂且昂贵。因此，转移项目“通过应用优化，压缩诱导的固化化的高精度光学元件”是通过创新方法来减少顺式周期的时间。此外，将改进并简化模具和过程控制概念，以进一步支持CI在现有的处理框架中的实施。许多值得科学研究的积分源于减少CIS周期时间的目的。首先，压缩速度对组件体积和物理衰老的效果仍未充分描述。这对于在较高温度下使用的组件尤其重要。另一个重要的一点是在压缩过程中对腔体的成分特性的不同熔体温度影响。这种效果与聚合物熔体的压力依赖性粘度直接相关，该粘度将通过新型的科学设备“ Gegendruckviskosimeter”进行分析。此外，由于过程本身确定的高空腔压力，微观结构的确切印象也对厚的壁组件也非常有希望。随着标本“光盘”的产生，可以在科学和紧急研究中进行理性点。一个组件的“镜头”实际上证明了通过创新的顺式方法，可以通过经济生产高精度塑料光学元件的能力。