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
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.