Based on the development and improvement of conventional processes, new process methods have been developed to further improve the quality of castings, increase production efficiency, and expand the application range of investment casting.

The cage-shaped components ensure sufficient rigidity of the module and double as a pouring system, increasing the utilization rate of molten steel by about 10%.Hebei Institute of Technology, etc., by controlling the solidification time of castings, inner runners, and gate rods, make M parts ≤ M inner ≤ M rods, and make solidification stop between the inner runner and the gate rod, and the liquid in the gate rod The metal is poured back into the hearth to achieve sprueless investment casting.

The process has strong filling performance, produces thin-walled castings, and has a high utilization rate of molten steel.

The release of suctionchina die casting vacuum is determined according to the thermal conductivity of the mold shell and the solidification time of the suction casting.

The third issue of "Casting" in 1984 published Ye Shengyong's article introducing the electrophoretic shell making process.Dip the conductive coating on the wax module, and add a small amount of chain phosphate as electrolyte in the electrophoresis suspension to make the surface of the refractory material absorb cations.

Under the action of the electric field, the refractory material will undergo electrophoresis and accumulate on the surface of the pattern.