The Basics of Machine Evaluation, Part III

摘要

A sharp or rapid transfer from first to second stage provides a nearly ideal situation for developing the cavity pressure. Again, since there is very little plastic that has to be delivered to the cavity, the rapid drop of plastic pressure in the nozzle does not overpack or accentuate the rapid development of cavity pressure. Note that the curves in Fig. 3 are more rounded and peak cavity pressure occurs during the constant second-stage pressure.