METHOD OF CASTING LARGE-SIZE THIN-WALLED SPECIAL-PURPOSE CASTINGS USING INVESTMENT-CASTING PROCESS

摘要

Usage:. Invention otnosils to the foundry, in particular, to the manufacture of large-size thin-walled castings, special purpose smelted emym models m SUMMARY OF THE INVENTION: before placing in the flask forms shells made based on crystalline quartz flask bottom and its lateral walls lined with heat insulating refractory a filler, and after the flask forms a gap between the sprue bowls forms flask was sealed and top plate made of the same refractory filler, with openings and a gating bowls, wherein a thickness of the filler was calculated from the formula in dependence on the thermal filler material, the exponent of the parabola of the temperature distribution in the bed floor filler and from time unloading the flasks with forms of calcination furnace .Before pouring.