CASTING MULTILAYER SHELL MOLD Russian patent published in 2021 - IPC B22C9/04 

FIELD: foundry.

SUBSTANCE: invention relates to foundry and can be used in the manufacture of metal castings for investment patterns. Casting multilayer shell mold contains thin-walled cladding, inner intermediate and outer outer layers. Facing and adjacent intermediate layers contain binding materials with increased binding properties in relation to the binding properties of the binding materials of the remaining intermediate and outer layers of the shell, which makes the shell mold more resistant to thermal shock from the liquid metal poured into it and reduces the loss of forms due to their cracking when filled with liquid metal.

EFFECT: increased shell mold strength and elimination of internal delamination of its layers.

1 cl