REMOVING METHOD OF CORE FOR CASTING

摘要

PURPOSE:To remove easily a core for casting after molding and to improve molding efficiency of the core by providing ejecting seat plates to the bottom end face of a liner incorporated in a core box, upsetting the core box after molding of the core and ejecting the seat plates by compressed air. CONSTITUTION:Sand which is cured in a core box 1 is charged into a core box 1 contg. a liner 2 to mold a core 9. The box 1 is inserted into a core upsetting machine upon curing and after the box is fixed by fixing pawls 3, a core molding board 10 attached with a fitting plate 11 is installed and the upsetting machine is operated. Compressed air is blown through a compressed air blow part 6 provided in a cylinder 5 of the upsetting machine after the upsetting to exert compressive force to ejecting seat plates 8 through flow ports 4 for the compressed air. The liner 2 and core 9 are dislodged from the box 1 by the compressed force. The man-hour for taking out the core 9 is reduced by such method and the failure and deformation of the box are decreased.