| 摘要 |
<p>PURPOSE:To evenly ram mold surface by flowing molding sand by pressure air into molding flasks in which the ends of the inflow port openings of molding sand are disposed perpendicularly to the side wall and spouting pressure air from the side face of the pattern. CONSTITUTION:A match plate 20 is sandwichingly pressed from both sides by molding flasks 22, 23 and squeezing plates 24, 26 are placed in the predetermined positions within the molding flasks 22, 23. At this time, the tip of a gate stick 25 abuts on the match plate. A molding sand blowing device 30 is abutted on the molding flasks 22, 23 and inflow holes 31, 32 are communicated with cavities 43, 44. Molding sand is flowed into the cavities 43, 44 by pressure air. At the same time, the pressure air is supplied into a cavity 27 via an air feed pipe 29 and is spouted to the match plate through injection ports. The pressure air is exhausted through vent holes 41, 42 to fill the molding sand to all corners of the molding falsk 21. Next, the squeezing plates 24, 26 are relatively advanced to ram the molding sand while compressing the same.</p> |
