Injection molding machine controls

Details Injection molding machine controls Injection molding machine controls

1974-04-03

1982-01-19

Briggs, William R.

Plastic article or earthenware shaping or treating: apparatus

Control means responsive to or actuated by means sensing or...

Temperature control

425145, B29F 106

Patent

active

043114466

ABSTRACT:
Method and apparatus 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: 3492700 (1970-02-01), Kornmayer
patent: 3642402 (1972-02-01), Hutchinson et al.
patent: 3870445 (1975-03-01), Hold et al.

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