B - Operations – Transporting – 29 – C
Patent
B - Operations, Transporting
29
C
B29C 45/76 (2006.01)
Patent
CA 2045532
A B S T R A C T A product acceptance/rejection judgment method in an injection molding machine, which makes it possible to properly and quickly set judgment standard parameters and accurately judge whether a product is acceptable or not. Based on injection pressures and screw positions periodically sampled during each of a plurality of injection processes in nondefective product molding, an injection pressure curve group represented as a function of the screw position and an injection pressure curve group represented as a function of the time period elapsed from the start of injection are displayed on two coordinate systems (6, 7) on a display screen. Various reference values (x, p, t) and various upper and lower limit values (pu, pl, tu, tl, xu, xl) defining various permissible ranges for each of the screw positions and elapsed times that have been selected on the coordinate systems are set in data display fields (8, 9), taking into account the distribution of the pressure curve groups and displayed contents shown in a data display field (10) and changing with movements of cursors (11, 12). During the execution of an actual molding cycle, each of the actual elapsed time period and actual injection pressure at each of selected screw positions, or each of the actual screw position and actual injection pressures at each of selected elapsed time periods is compared with its permissible range so as to check the acceptance/rejection of the same. Based on the resultant number of rejections, the conformity of a product is determined.
Kamiguchi Masao
Kubota Kazuo
Neko Noriaki
Fanuc Ltd
Kamiguchi Masao
Kubota Kazuo
Marks & Clerk
Neko Noriaki
LandOfFree
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