Classification discharging method for workpiece

Abstract

Work pieces are carried by intermittently rotating the index table 2 containing the work pieces 4 in the holding holes 1, and during this period, electric characteristics of the work pieces 4 in the holding holes 1 of the index table 2 is measured by a measuring part 20. Based on the measured result of the electric characteristics from the measuring part 20, compressed air is jetted into the holding holes 1 by a classification control means 24, and the work pieces 4 is discharged from discharge chutes 25 to corresponding containers 26 according to the measured result. The classification control means 24 sorts the work pieces 4 into multiple groups, and sequentially discharges the work pieces 4 for every group during stopped period of the index table by compressed air.

Description

technical field [0001] The present invention relates to the measurement of electrical characteristics or shape inspection (hereinafter typically referred to as measurement) of chip-shaped electronic components and the like (hereinafter referred to as workpieces) conveyed by conveying devices such as index tables or conveyor belts, and the methods of sorting and discharging the workpieces Classification method. Background technique [0002] Conventionally, as a method of sorting and discharging workpieces, it has been disclosed that, for example, an index table that accommodates a plurality of workpieces in a holding hole is rotated intermittently, and the electrical characteristics of the workpieces in the holding hole are measured while the index table is stopped. method. The workpiece stored in the holding hole of the index table is then discharged to the storage part through the discharge chute by the compressed air sent from the sorting control mechanism based on the me...

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Problems solved by technology

However, since the discharge speed is very slow compared to the measurement speed, in recent years, due to the high-speed processing requirements, it is desired to collectively discharge a plurality of measurements.

In addition, due to the miniaturization of workpieces in recent years, the air supply pipeline has also been reduced, and the air supply volume or pressure transmission has also been limited due to pipeline resistance, so corresponding countermeasures must also be taken.

At this time, the workpiece in the holding hole is discharged by compressed air while the indexing table is stopped, but when multiple workpieces are discharged by compressed air at the same time, it will cause a sharp drop in the pressure of the compressed air, and the workpiece cannot be reliably removed from the The holding hole of the index table is discharged to the side of the discharge chute

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