Kmb. Jansen et al., EXPERIMENTAL VALIDATION OF SHRINKAGE PREDICTIONS FOR INJECTION-MOLDEDPRODUCTS, International polymer processing, 13(1), 1998, pp. 99-104
Two injection moulding simulation codes (C-MOLD of AC Technology and V
Ip of Eindhoven University) are compared with experimental results reg
arding cavity pressure and product shrinkage. It turns out that the ca
vity pressure profiles are only moderately well predicted by both code
s. The shrinkage predictions can be considered as a post processing st
ep with temperature and pressure fields as an input (the so-called the
rmoelastic model). It is shown that the shrinkage predictions agree we
ll with the measurements using the thermoelastic model with actual pre
ssure profiles as an input. Direct simulation of product shrinkages re
sulted in an overprediction of shrinkage.