Analysis of shape deviations of technical polyamide workpieces in different defined time intervals

Engineering grade plastics gain importance across the industry and have become indispensable today. Machine operators must concern themselves among others with environmental and manufacturing influences that can affect the geometrical properties of plastic articles daily. In practice, these are declared as check gauges in the inspection drawing and are checked in accordance with quality standards. Based on experience, plastic articles made from polyamide start to grow after a certain time span. Even manufacturers of plastic granulate indicate this in their fact sheets. Here, the geometry of the plastic articles themselves plays a crucial role, especially in how far it can be altered. Additionally, in globally aligned companies with several production facilities, certain ecological influences such as temperature and humidity are different. The effect this has on plastic articles in terms of growth has been investigated in a different research paper [1]. This paper is primarily concerned with the evaluation of geometrical alteration by means of warpage formation. Thereby, an experimental part is demonstrated and constituted in comparison with two different climate simulations, of standard climate and one of extreme climate, over the course of a defined period of two months.