| 摘要 |
PURPOSE:To minimize the required number of casting molds and to reduce the amt. of the sand to be used and casting time by disposing continuously in parallel plural pieces of casting molds which are vacuum-molded, charging and casting molten metal simultaneously therein and constituting the front and rear of castings with the front and rear of the casting molds. CONSTITUTION:Four pieces of casting molds 4 obtd. by using patterns 1, 2 for vacuum molding having pipes 5 for sucking patterns and providing molding flasks 4 for vacuum molding and pipes 7 for sucking the casting molds are disposed continuously in parallel, and molten metal is charged and cast simultaneously in three pieces of the resulted mold cavities 6, whereby three pieces of castings are obtd. simultaneously with four pieces of the casting molds. The advantage possessed by the vacuum molding method of easy strippability for sand is thus utilized effectively without requiring any binder for molding sand and further roughly one piece of casting with one piece of casting mold is obtd. |
