| 摘要 |
<p>The invention provides a process and an apparatus of mold-making or core-making, it is characterized in that injecting the surface layer mixture consisting of fine sands and the back layer mixture consisting of coarse sands into the mold or core-box, the surface layer mixture adhering to the surface of mold or core box, and together with the back layer mixture hardening into a whole mold or core. Compared with the existing technology, the invention has increased the speed and precision of molding or core-making, adapted to large-scale industry production, and also improved the precision of castings.</p> |
