The invention discloses a fusible mold
precision casting method which comprises the following steps: preparing a
wax mold of a product and
welding the
wax pattern and a pouring
system to obtain a module;
coating the outer surface of the module with a
refractory material, manufacturing a molding shell, enabling the manufactured molding shell to enter a dewaxing process so as to dewax;
roasting the dewaxed molding shell, wherein the
roasting temperature is 800-900 DEG C, and the
roasting time is 2-3 h; filling the roasted molding shell into a sand box, and then adding sand to carry out vibrating compaction; conveying the sand box subjected to vibrating compaction to a pouring position, abutting a vacuum line with an abutting port of the sand box before pouring, starting a vacuum
system to vacuumize the sand box, pouring product
alloy liquid into the pouring
system, enabling the product material
alloy liquid to enter the molding shell formed after
product model roasting from a pouring cup of the pouring system, and cleaning after the product material
alloy liquid is cooled and condensed so as to obtain a
casting. The fusible pattern
precision casting method has the advantages that defects of bump, shrinkage cavity,
shrinkage porosity and the like in the surface of the
casting can be avoided, and the
casting dimension is relatively stable.