To prevent the mixture of different material from happening at the time of recovering a returned material.
A cast product 2 and the returned material 3 in each molding flask are fed from a shaker to a separating conveyor 4 as a unit feeding quantity. The returned material 3 is transferred into a recovering conveyor 5 and the returned material corresponding to the feeding quantity having the preset unit number is divided as the unit batch quantity by operating the opening/ closing of each stopper device 7b-7d in the recovering conveyor 5 while using tracking data linked with the cast product in each unit feeding quantity as an index, and also, the returned material 3 is sent in order in each unit batch quantity and supplied into a crushing device 12. The crushing device 12, the returned material 3 is crushed by unit batch quantity and the crushed material 3 is separated by the same material.
FUJIWARA HITOSHI
KATAUE MASAYOSHI
INABA KOJI
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