There are two types of dewaxing casting methods: solid core mold method and pottery shell mold method, the latter is an improved method of the previous one. The solid core mold method takes into account the condensation shrinkage of the wax mold, the heating expansion of the mold, and the condensation shrinkage of the molten metal material to make abrasive tools with similar specifications to the final casting. The melted wax is poured into this abrasive tool made of metal material or silicon rubber, after removing the wax, it penetrates into the powderA slurry made by mixing refractory insulation materials and adhesives.

After dripping, spread the coarse-grained refractory insulation material to make it dry. Put it into the casting frame, spread the fireproof particles mixed with adhesive, and then drydry. Then heat the wax to melt and flow out to form a mold. Heat the mold at high temperature to burn off a small amount of residual wax and improve its compressive strength.The introduction of molten metal material.

The production of the pottery shell mold method to the wax mold is the same as the solid core mold method. Only after dipping and dipping sand (or floating sand), the coating is not carried out.The work of the mould is only to carry out the dipping and sand drenching several times until the thickness of the casing is set. Dry, heat, melt to discharge wax, high temperatureHeating and re-casting. This type of method is commonly used by practitioners of dewaxing precision castings at this stage, because it has the following advantages:

(1) The specifications have the best reliability;

(2) The demand for refractory insulation materials is small;

(3) Lighter weight, easy to transport, solve, and make large castings;

(41) Manufacturing can be partially automated technology to save human resources and increase manufacturing speed;

(5) Lower product cost;

(6) The pottery shell mold is thin, and the cooling rate of the casting after casting is higher and symmetrical, so this mechanical characteristic is the best.