Sand casting of metal mixes sand with setting agent filled into box to set into negative product shape finely machined in place to cast product shape.

摘要

Sand or other granular material is mixed with setting agent to form a mass shape (4) subsequently machined to give a mold as the negative of the casing. The mold is then covered and poured and the metal allowed to cool in the mold form for eventual removal in cast form. The solidified mix is machined by NC-controlled machine and gives a straight-sided paralleliped for the casting. A machined core is positioned in the mold (6) via hole (8). Gating hole is provided as well as gas outlet and a hole in the cover in hydraulic connection with the mold (4). During machining the wall areas of the mass shape are machined with draft to ease removal.