Patent ID: 7823621
Filing Date: 2010-11-02
Classification: B22C

Abstract:
1. A method for making flaskless upper and lower molds that are stacked using two pairs of cope and drag flasks, comprising the steps of providing two pairs of cope and drag flasks, holding a match-plate between one pair of the two pairs of cope and drag flasks that are in a horizontal position, each of them having a sand-filling port at a side wall thereof, defining upper and lower molding spaces by inserting upper and lower squeeze-plates into respective openings of the one pair of cope and drag flasks, which openings are opposed to the match-plate, moving the one pair of cope and drag flasks and the match-plate to a vertical position, and causing the sand filling ports to be placed in an upper position, spraying a release agent into the upper and lower molding spaces, supplying molding sand through the sand-filling ports to the upper and lower molding spaces, squeezing the molding sand in the upper and lower molding spaces to form upper and lower molds therein, and returning the one pair of cope and drag flasks to the horizontal position, wherein the step of squeezing the molding sand in the upper and lower molding spaces is carried out by moving the upper and lower squeeze-plates toward each other, while the one pair of cope and drag flasks and the match-plate are returning to the horizontal position.