Injection pressure monitoring apparatus

Details Injection pressure monitoring apparatus Injection pressure monitoring apparatus

1984-03-21

1986-04-22

Woo, Jay H.

Plastic article or earthenware shaping or treating: apparatus

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

Molding pressure control means responsive to pressure at...

425170, B29C 4792

Patent

active

045839310

ABSTRACT:
An apparatus for monitoring data concerning injection pressure in an injection molding machine is disclosed in which a multipoint sampling technique is used to acquire and store injection pressure reference data in the form of a time varying data curve for a first injection molding cycle. The reference data is used to form upper allowance data which is stored in the form of a time varying data curve having a constant offset from the reference data curve. The upper allowance data is then compared with injection pressure data acquired using a multipoint sampling technique during a second injection molding cycle and an alarm is issued if the data acquired in the second injection molding cycle exceeds the upper allowance data.

REFERENCES:
patent: 3965744 (1976-06-01), Gutjahr
patent: 4207047 (1980-06-01), Kolb et al.
patent: 4426341 (1984-01-01), Tsuzuku et al.

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