METHOD FOR SHF HEAT TREATMENT OF CERAMIC CASTING MOLDS Russian patent published in 2007 - IPC B22C9/04 

FIELD: foundry, namely heat treatment of ceramic molds for casting with use of investment patterns.

SUBSTANCE: method is designed for heat treatment of ceramic molds for casting with use of investment patterns made on base of Al₂O₃, Fe₂O_4, MnO_2. Method comprises steps of placing casting molds in chamber for SHF- heating on rotary platform with openings; arranging casting basins of casting molds over said openings whose number is equal to quantity of casting molds; driving platform to rotation at revolution number 1 - 3 per minute; setting power level of SHF-energy in such a way tat to provide 200 - 400 Wt for each kilogram of casting mold mass; heating for 40 - 120 s; lowering SHF -energy power by 20 -25% and soaking casting molds for 4 - 8 min for baking them and completely removing pattern mass; turning off SHF generator; cooling casting molds till 70 - 80°C; unloading casting molds and melted-out pattern mass.

EFFECT: accelerated manufacturing process, improved quality of article surface, possibility for multiple usage of pattern mass.