Anisotropy of physical properties injection moulded parts and its analysis

Purpose: Anisotropy of physical properties in injection mouldings is a phenomenon commonly performing and very difficult to avoid. However in some cases for its size occurring of diversity of the property the using of such a element is becoming impossible. Chosen effects of examinations of anisotropy of properties depending on of the place and the method of the sampling research were presented in the article. Design/methodology/approach: A Dynamic Mechanical Thermal Analysis method giving possibility in the very precise solution was take advantage in examinations of differences between samples taken from each places injection moulding part. Research samples were cut from the flat plate and then were taken advantage to research. The method of the sampling was presented in the figure. Findings: How were presented in the discussion of effects of research in polymer materials processing particularly thermoplastics polymers, anisotropy of physical properties with indispensable phenomenon. Occurring anisotropy is involving diversity of durability of each areas of injection moulding part and different behaviour oneself during using. Samples taken from the beginning of the flow way were marked by better mechanical properties but poor suppressing properties. However samples taken parallel to the direction of the polymer flow in the mould were marked (in temperatures over 40 deg) with better suppressing properties. Practical implications: Analysis of examinations of anisotropy of mechanical and using properties in injection molded parts (presented in the article) could find practical application in polymer processing industry, both small and large enterprises. There are many problems with very complicated mouldings and the know-how presented in this article could be very useful industry application. Originality/value: New approach to precocious estimation anisotropy of physical properties were present in the paper.

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