A METHOD FOR ESTIMATING BULK MELT TEMPERATURE AND PART WEIGHT IN INJECTION-MOLDING OF AMORPHOUS THERMOPLASTICS

Citation
Ae. Varela et al., A METHOD FOR ESTIMATING BULK MELT TEMPERATURE AND PART WEIGHT IN INJECTION-MOLDING OF AMORPHOUS THERMOPLASTICS, Advances in polymer technology, 15(1), 1996, pp. 17-28
Citations number
19
Categorie Soggetti
Polymer Sciences","Engineering, Chemical
ISSN journal
07306679
Volume
15
Issue
1
Year of publication
1996
Pages
17 - 28
Database
ISI
SICI code
0730-6679(1996)15:1<17:AMFEBM>2.0.ZU;2-1
Abstract
A methodology is presented to estimate cavity melt temperatures and pa rt weight in the injection molding of amorphous thermoplastics. The ap proach uses measurements of cavity pressure near the gate and surface temperatures at three sensor locations. The surface temperature data w ith a heat conduction model give estimated temperature profiles across the cavity thickness. These profiles are then used to estimate the av erage cavity melt temperature. Fitting the cycle-to-cycle values of av erage mold-cavity temperature and peak pressure to a Tait equation yie lds a model to estimate part weights. The estimated part weights agree with measured values for different injection-molding conditions. (C) 1996 John Wiley & Sons, Inc.