Adaptive process control for injection molding

Details Adaptive process control for injection molding Adaptive process control for injection molding

1988-10-17

1989-07-25

Levy, Stewart J.

Measuring and testing

Liquid analysis or analysis of the suspension of solids in a...

Viscosity

G01N 1104

Patent

active

048502170

ABSTRACT:
An injection molding machine is utilized to develop PVT constants for a given material by pressurizing the material in the barrel against the blocked outlet nozzle, measuring the volume during pressurization, and then weighing the pressurized shot after it is purged from the barrel in order to calculate the specific volume of the material. Plotting specific volume against a variety of pressure and temperature values produces a plot of PVT relationships from which the constants can be derived.

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Society of Plastics Engineers--Pittsburg Section, "Injection Molding--The Next Five Years", Author: Wolfgang Meyer, Nov. 1985.
Plastics Technology, Nov., 1985, p. 25, "PVT Holding-Pressure Control: Here's What It Can Do for You".

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