Method of controlling holding pressure in injection molding and

Details Method of controlling holding pressure in injection molding and Method of controlling holding pressure in injection molding and

1992-03-19

1994-03-22

Heitbrink, Jill L.

Plastic and nonmetallic article shaping or treating: processes

With measuring, testing, or inspecting

Positioning of a mold part to form a cavity or controlling...

2643281, 425149, 425159, 425166, B29C 4577, B29C 4578

Patent

active

052961745

ABSTRACT:
A method of controlling holding pressure in an injection molding operation and an apparatus therefor, wherein the quality of molded products can be controlled with a high accuracy without the need for a pressure sensor in a mold and without requiring any additional data such as the thickness of a molded product, the effective heat diffusion rate, and so on. Further, a method for estimating resin temperature in injection molding and an appartus therefor, wherein in-mold resin temperature in a holding pressure and cooling stage is estimated during injection at a high speed and with a high accuracy.

REFERENCES:
patent: 4932854 (1990-06-01), Matsuda et al.
patent: 4983336 (1991-01-01), Langlois
patent: 5088911 (1992-02-01), Kumazaki
Matzke, Dr. Ing. Andreas, "Prozessrechnereinsatz Beim Spritzgiessen", Institut for Kunststoffverarbeitung, Process Control Computers In Injection Molding, pp. 71-87 and Translation pp. 1-17, 1989.

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