| 摘要 |
A sand-blowing apparatus for a molding machine having a sand-storing tank for storing foundry sand disposed so as to be movable vertically and having an opening in an upper part of the sand-storing tank for supplying sand thereto, a nozzle in a bottom part of the sand-storing tank, a chamber in a central part of the sand-storing tank, and an exhaust valve that communicates with the chamber, a compressed air tank for storing compressed air that is movable vertically located above the sand-storing tank, and having an opening in a bottom part of the compressed air tank for blowing compressed air, a device for moving the compressed air tank toward and away from the sand-storing tank, a valve for controlling the opening and closing of the opening in the bottom part of the compressed air tank, a piston rod connected to said valve that passes through an upper part of the compressed air tank, and a device for raising and lowering the piston rod to thereby open and close the valve, wherein when the compressed air tank is lowered and abuts the sand-storing tank, the opening in the upper part of the sand-storing tank communicates with the opening in the bottom part of the compressed air tank so that when the valve in the compressed air tank is opened, foundry sand is blown through the nozzle in the sand-storing tank by the compressed air in the compressed air tank.
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