Plastic article or earthenware shaping or treating: apparatus – Control means responsive to or actuated by means sensing or... – Control means responsive to product weight or dimension
Patent
1988-06-20
1990-04-03
Woo, Jay H.
Plastic article or earthenware shaping or treating: apparatus
Control means responsive to or actuated by means sensing or...
Control means responsive to product weight or dimension
264404, 264405, 425145, 425149, 425150, B29C 4577, B29C 4580
Patent
active
049136380
ABSTRACT:
Apparatus for operating an injecting molding process utilizing an acceptable part and process window for an injection molding machine having a pair of separable mold elements forming a mold cavity with a part-line therebetween, means for opening and closing the mold elements, and means for introducing a moldable material into the mold cavity at a first pressure and for exerting a second pressure on the moldable material as it cures in the cavity. The apparatus includes means for generating an acceptable part and process window for the machine by operating the machine by closing the mold elements, means for introducing a moldable material into the mold cavity, and measuring the separation of the mold elements resulting from the introduction of the moldable material into the mold cavity. At least one operating parameter is incrementally changed over a plurality of molding cycles until unacceptable parts are produced to generate minimum part-line and time values for that machine and process. At least one operating parameter is incrementally changed over a plurality of molding cycles until unacceptable parts are produced to generate maximum part-line and time values. Then, an acceptable part and process window is generated utilizing the minimum and maximum part-line and time values.
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Eastman Kodak Company
Heitbrink Timothy W.
Randall Robert L.
Woo Jay H.
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