METHOD AND APPARATUS FOR MAKING PRODUCTS WITH INSULATED CAVITY Russian patent published in 2001 - IPC

FIELD: foundry, namely centrifugal casting processes for making articles with insulated ellipsoidal cavity. SUBSTANCE: method comprises steps of preliminarily casting melt to ingot mold; rotating ingot mold with melt simultaneously around two (vertical and horizontal) crossing axes; determining angular velocity values of ingot mold depending upon geometrical parameters of insulated cavity in the form of ellipsoid of revolution according to formula: d⁴/q⁴= ω41

/ω22(ω21+ω22), where ω₁- angular velocity relative to vertical axis, ω₂ - angular velocity relative to horizontal axis. Ingot mold is joined with mechanism for simultaneous rotation of it around vertical and horizontal axes. Horizontal shaft of mechanism has two coaxial parts and it is coupled with vertical shaft by means of rotating member of transmission mechanism engaging with its stationary member. Rotary units are mounted on coaxial parts of horizontal shaft and they support members for fixing ingot mold in zone of crossing of axes of vertical and horizontal shafts. Horizontal shaft is also provided with balancing rotating member of transmission mechanism. Said member engages with stationary member of transmission mechanism and it is mounted symmetrically relative to rotating member of transmission mechanism. EFFECT: possibility for making products with insulated cavity in the from of ellipsoid. 2 cl, 4 dwg, 2 ex