Injection molding machine controls

Details Injection molding machine controls Injection molding machine controls

1974-04-22

1978-06-13

Kucia, Richard R.

Plastic and nonmetallic article shaping or treating: processes

With measuring, testing, or inspecting

Controlling heat transfer with molding material

264329, B29F 108

Patent

active

040949400

ABSTRACT:
Method for controlling the parameters of injection molding processes in a machine having a barrel with a plasticating chamber and a screw, rotatably and slidably disposed in said chamber, hopper means adjacent one end of said chamber communicating therewith and nozzle means disposed in the other end of said chamber communicating with a mold. Control of the injection molding process is achieved through an event recognition philosophy by sensing screw position, screw injection velocity, melt temperature, comparing the values at certain instances during the work cycle with known or desired values and using these values, changes of values and differences of values to monitor and initiate changes in the process parameters.

REFERENCES:
patent: 3632246 (1972-01-01), Ichikawa
patent: 3642402 (1972-02-01), Hutchinson
patent: 3693946 (1972-09-01), Meritt
patent: 3695800 (1972-10-01), Hutchinson
patent: 3721512 (1973-03-01), Ma
patent: 3728058 (1973-04-01), Wheeler
patent: 3767339 (1973-10-01), Hunkar

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