| 摘要 |
<p>PURPOSE:To improve the filling rate of molding sand in cavity. CONSTITUTION:A thin/wide mold is molded by blowing molding sand into a thin/wide cavity 16 from plural blow in mouths 12b and filling the cavity with molding sand. The method consists of the process, in which as a specific mouth 12b is opened with moving a pushing bar 20 and other mouths are closed, molding sand is blown in the cavity 16 from the specific blow in mouth 12b, and the process, in which after the specific blow in mouth is closed by the pushing bar 20, with opening an another blow in mouth 12b, molding sand is blown in the cavity 16 from the another blow in mouth 12b. Thus, as plural blow in mouths 12b are opened/closed in order by the pushing bar 20 and molding sand is blown into the cavity 16, molding sand, etc., is prevented to back flow from other blow in mouths 12b to outside of the cavity 16, the filling rate of molding sand is improved.</p> |
