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Mold refers to the mold used to produce wax models. This mold is used on a wax pressing machine to mass-produce wax patterns for parts. Materials include aluminum alloy, stainless steel, carbon steel, alloy steel, etc. Determining the mold material based on the order quantity can effectively control costs.

Mix paraffin, resin, and other materials to make the required wax. Use a wax press to press the wax into a model of the part. After demoulding, the burrs of the wax mold need to be trimmed and placed in water to cool.

Use a soldering iron or mechanical assembly method to weld the wax model to the pouring system with the pouring port. This process is called a group tree. After assembling the tree, let it sit until the welded joint solidifies.

The coating is composed of refractory materials and binders (water glass or silica sol). Before impregnation, the wax tree needs to be deoiled and degreased to improve the adhesion of the paint to its surface. The surface of the wax tree is fully coated with paint.

A sand blower will be placed next to the paint bucket, and the wax tree wrapped with the paint will be put into it. After a while, the mold will be covered with sand evenly.

Use air drying to dry and harden. After drying and hardening, need Dipping, Spread Sand, and Drying several times until the shell reaches the specified thickness.

Use high-temperature steam to expel the wax from the mold shell. This results in a molded shell with a cavity ready for pouring. After dewaxing, to make the shell stronger and remove the remaining wax and moisture, we still need to bake it at about 1000°C.

When smelting stainless steel, we need to pay attention to the time and amount of adding auxiliary metal. There are also strict requirements for the temperature of the crucible and the time for metal smelting. After the metal smelting is completed, the next step is entered.

After the casting is cooled, the surface mold needs to be removed, and cutting is used to separate the casting and the gate. The surface residue of the casting is then removed by shot blasting.

Heat treatment is used to improve the internal stress of the casting and adjust its internal structure to obtain parts with special properties. The primary heat treatment methods are softening annealing, normalizing treatment, quenching treatment, surface hardening treatment, and precipitation hardening treatment.

The finishing of stainless steel investment castings mainly includes physical methods such as mirror polishing, wire drawing, etc., and chemical methods such as passivation, electroplating, etc. We provide customization services for packaging appearance and materials.

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