DEVICE FOR KNOCKING OUT CORE CYLINDER

PROBLEM TO BE SOLVED: To provide a simple device, capable of easily and proactively knocking out a core cylinder remaining in a pipe after casting and easily ejecting the core cylinder. SOLUTION: The device comprises a socket molding side edge 2a of a centrifugal casting metal flask 2, and a plate 4, which can be inserted in a cast-iron pipe 3, integrated on the side of pulling out the pipe 3 with a device 10 for pulling out the pipe 3. When the plate 4 is inserted in the casting metal flask 2 which is rotating after casting, the plate 4 hits the core cylinder 7 formed in the flask 2 and remaining in the pipe 3, and knocks out the core cylinder 7.