Plastic and nonmetallic article shaping or treating: processes – With measuring – testing – or inspecting
Patent
1990-11-29
1993-04-06
Heitbrink, Jill L.
Plastic and nonmetallic article shaping or treating: processes
With measuring, testing, or inspecting
425136, 425145, 425155, 425169, B29C 4576
Patent
active
052001261
ABSTRACT:
A method and an apparatus for monitoring the process stability of an injection molding machine having a reciprocating screw engaged in the plasticating of a moldable material in preparation to its being introduced into the mold cavity. The invention involves the measurement of the duration of the operation of the screw engaged in the plasticating of the moldable material and includes the analysis of this duration over a period of time thus providing the supervisor with the necessary information to determine whether the machine/process is meeting or deviating from the desired operating requirements.
REFERENCES:
patent: 3693946 (1972-09-01), Merritt
patent: 3797808 (1974-03-01), Ma et al.
patent: 3825235 (1974-07-01), Schwertfeger
patent: 4146601 (1979-03-01), Bishop
patent: 4904172 (1990-02-01), Buja
Miller Alan B.
Wenskus, Jr. James J.
Eastman Kodak Company
Heitbrink Jill L.
Heslin Robert E.
Levitt Joshua G.
Snee Charles E.
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