About this Journal Submit a Manuscript Table of Contents
Advances in Mechanical Engineering
Volume 2013 (2013), Article ID 407964, 7 pages
http://dx.doi.org/10.1155/2013/407964
Research Article

Affecting the Ageing Behaviour of Injection-Moulded Microparts Using Variothermal Mould Tempering

Friedrich-Alexander-Universität Erlangen-Nürnberg, Institute of Polymer Technology, Am Weichselgarten 9, 91054 Erlangen-Tennenlohe, Germany

Received 23 May 2013; Revised 2 September 2013; Accepted 3 September 2013

Academic Editor: Gang Wang

Copyright © 2013 Steve Meister and Dietmar Drummer. This is an open access article distributed under the Creative Commons Attribution License, which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.

Abstract

The fast cooling of the melt in an injection moulding process for manufacturing polymer microparts can lead to a modified inner structure, resulting in minor mechanical properties. Furthermore, the ageing can be also dependent on the process-induced properties. The results indicate that especially physical ageing processes occur in parts with unpropitious inner properties. Chemical ageing processes seem to occur independently of the process conditions in microparts. Tensile tests indicate that a process-induced favoured morphology can reduce the ageing-based change of mechanical properties.