| 摘要 |
<p>A method and device for efficiently forming high quality, molding-flask-less, upper and lower molds. A match plate is held by a pair of horizontally-set, upper and lower molding flasks each having a sandblast port in the side wall. Upper and lower squeeze means are inserted in match-plate-less openings in the upper and lower molding flasks, so as to define two upper and lower molding spaces. The upper and lower molding flasks and the match plate are set in a vertical state and the sandblast ports are moved upward. Molding sand is blasted from the sandblast ports into the upper and lower molding spaces to fill the latter with molding sand. The upper and lower squeeze means are further moved while the upper and lower molding flasks and match plate are restored to the horizontal state, so as to squeeze the molding sand in the upper and lower molding spaces. The upper and lower molding flasks in the mold are separated from the match plate, and then the match plate is carried out from between the upper and lower molding flasks. A core, if necessary, is set in the formed mold, and then the upper and lower molding flasks in the mold are superposed. The mold is extracted from the superposed upper and lower molding flasks.</p> |
