PROCEDEU OENTRU REALIZAREA FORMELOR DE TURNATORIE

摘要

The process comprises impregnation of the mould cavities through controlled pressure reduction to 0.4 N/cm2 in the mould. The mould is made of quartz sand, bentonite and coal dust. The impregnation agent is polystyrene dissolved in ethyl acetate or in carbon tetrachloride, for manufacture, e.g. of cobalt-based alloy wire, used in plating by welding of metal machine engineering parts.