METHOD FOR MANUFACTURING SANDMOLD

摘要

A method for manufacturing an excellent sandmold by adjusting the pressure value or the blowout time of a first compressed air. In the method, foundry sand is squeezed by moving a squeeze means to a pattern plate side after the foundry sand is blown into a molding space demarcated by at least the pattern plate, a flask, and the squeeze means by supplying a second compressed air onto the upper surface of the foundry sand held in a sand blowing device while floatingly moving the foundry sand near a sand blowout port held in the sand blowing device by blowing the first compressed air near the sand blowout port of the sand blowing device positioned above the molding space and holding the foundry sand. The blowout time of the first compressed air can be decreased or increased based on the results obtained by measuring a movement distance to the pattern plate side of the squeeze means when the squeeze of the foundry sand in the molding space is completed and calculating a difference between the measured value and a target value.