Plastic article or earthenware shaping or treating: apparatus – Control means responsive to or actuated by means sensing or... – Feed control of material en route to shaping area
Patent
1992-08-26
1993-11-09
Heitbrink, Tim
Plastic article or earthenware shaping or treating: apparatus
Control means responsive to or actuated by means sensing or...
Feed control of material en route to shaping area
264 403, 264 407, 425149, B29C 4577
Patent
active
052597482
ABSTRACT:
An article conformity discriminating apparatus for an injection molding machine is capable of automatically discriminating the conformity of articles with accuracy without using a conforming article sample. In molding cycles for mass production of articles executed according to optimum molding conditions of a mold file read from a shared memory (105), an actual resin pressure detected by a pressure sensor (4) is periodically sampled according to an output of an address generator (118), while a reference resin pressure sampled in the same sampling period or a corresponding sampling period on a pressure transition pattern, in a conforming article molding process for determining the optimum molding conditions made before the mass production of the articles, is read from the shared memory, (105) by a processor (114), and the actual resin pressure is compared with the reference resin pressure. If the absolute value of the difference between the values falls outside an allowable range, a defective sample counter value is incremented. When a hold process ends, a conforming article signal is sent if the counter value indicating the frequency of improper actual resin pressure generation is not greater than an allowable frequency, whereas a defective article signal is sent if the counter value exceeds the allowable frequency.
REFERENCES:
patent: 4970447 (1990-11-01), Kamiguchi et al.
patent: 5017315 (1991-05-01), Kumazaki
Kamiguchi Masao
Kobayashi Minoru
Neko Noriaki
Fanuc Ltd.
Heitbrink Tim
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