Investment casting, also known as lost wax casting,the method in China originated in the spring and Autumn period at the latest,includes pressing wax, repairing wax, tree forming, slurry sticking, melting wax, casting liquid metal and post-treatment. Lost wax casting is to use wax to make the wax mold of the parts to be cast, and then the wax mold is coated with water glass and sands, which is called sands mold,after the mold is dried,dip it into a container of hot water to melt the inner wax mold. Take out the sands mold of the melted wax mold and bake it into pottery mold once roasted. Generally, when making mud mold, the pouring port is left, and then the molten steel is poured into the pouring gate.After cooling, the required parts are made.

1. The products with complex structure is available
2. Ordinary steel and special steel both are available
3. Reduce the cost of machining process
4. Smooth surface and high dimensional accuracy
5. Suitable for mass production


UMC adopt friction screw press to produce some high quality hexagon nut, domed nut ,domed plate, angle plates and some special SDA accessories. Forging can eliminate the casting porosity and optimize the microstructure. Meanwhile, the mechanical properties of forgings are generally better than those of castings of the same material due to the preservation of complete steel flow lines.

1.The microstructure and mechanical properties of steel can be improved after forging.
2.Forging process can ensure the continuity of the internal structure of the metal, consistent with the shape of the product.
3.The forging process creates a refined grain structure and improves the physical properties of the steel.


UMC has multiple machining production lines to meet the deep processing requirements of accessories of self drilling anchor system. At the same time, in order to get through the upper and lower industrial chain, we integrate resources with some strategic partners and try our best to provide customers with one-stop supply and service. From 2021, UMC began to carry out the transformation of intelligent factory to inject more power into the future.

    Heat Treatment

In order to make the accessories of self drilling anchor achieve a good mechanical properties and adapt to various geological condition and engineering requirements, UMC has carried out classified heat treatment on the accessories, through annealing, normalizing, quenching and tempering process, to ensure that the internal structure of each product is delicate and achieves certain physical conditions. For some products with special materials, we adopt multiple heat treatment process to meet the special requirements of customers.

    Surface Treatment

Our surface treatment processes include plastic spraying, electroplating, hot galvanizing, blackening, chrome plating, electrophoresis, oxidation and epoxy to meet the requirements of rust prevention and corrosion protection in various geological conditions. We can also customize the standard colors according to the requirements of customers.

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