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Developments of the structure calculation of thermoplastics
Author(s) -
Michaeli Walter,
Hoffmann Stefan
Publication year - 2000
Publication title -
macromolecular materials and engineering
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.913
H-Index - 96
eISSN - 1439-2054
pISSN - 1438-7492
DOI - 10.1002/1439-2054(20001201)284:1<46::aid-mame46>3.0.co;2-4
Subject(s) - injection moulding , process (computing) , materials science , mechanical engineering , quality (philosophy) , orientation (vector space) , phase (matter) , stress (linguistics) , computer science , thermal , engineering drawing , process engineering , composite material , engineering , mathematics , geometry , philosophy , chemistry , organic chemistry , epistemology , physics , meteorology , operating system , linguistics
In plastics processing, injection moulding constitutes the most popular process for manufacturing plastics parts. Complex technical mouldings which are required to meet high quality specifications in respect of their optical, geometrical or mechanical properties, for example, represent an increasing challenge for mould designers and machine engineers alike. In order to be able to produce the specified product quality, it is absolutely essential to know how the material will behave during the processing operation. This paper will give an overview of new applications and developments in the calculation of internal material properties based on the three‐dimensional simulation. The accuracy of the results can be considerably improved through the consistent three‐dimensional calculation of structural data such as fiber orientation and internal stresses. Three‐dimensionally calculated trajectories can be used as a guide to the direction of fiber orientation in components and can already show good conformity with reality. An inherent stress calculation performed with a three‐dimensional calculation model in the filling and the solidification phase can be used to estimate the thermal warpage. Nevertheless, a complete description of the injection moulding process giving a higher level of accuracy in the results is only possible if the packing phase can also be included in further stages of simulation tools.