Hydraulic cylinder parts-HS14

Wax pattern precision casting, also known as candle method precision casting or lost wax precision casting, is a common precision casting process used to manufacture products with complex shapes and high precision requirements. Metal parts.

The main steps of wax pattern precision casting are as follows:

Mold preparation: Make a wax model according to the shape and size requirements of the casting. Wax patterns are usually made by injection molding or other methods using special waxes with low melting points. A wax pattern can be a single part or multiple pieces assembled to facilitate subsequent casting.

Assemble and Surround: Assemble the wax mold into one or more riser branches and place the entire assembly in a metal casing (also called a shell mold). Shell molds are constructed from multiple layers of ceramic coatings (such as plaster, silicone, etc.) to provide adequate support and the ability to withstand high temperatures.

Dewaxing: The entire shell mold is heated until the wax mold melts and flows out to obtain a cavity. This process is called lost wax, which is why this process is also called lost wax investment casting.

Preheating and impregnation: Preheat the dewaxed shell mold to remove residual wax and moisture and improve the heat resistance of the material. Then, the molten metal material (usually aluminum alloy, nickel-based alloy, etc.) is poured into the preheated shell mold by dipping or spraying.

Cooling and solidification: After the metal material cools and solidifies in the shell mold, the shell mold is knocked or otherwise damaged to remove the casting.

Polishing and post-processing: Post-processing processes such as polishing, trimming, cleaning and heat treatment are performed on castings to improve dimensional accuracy and surface quality and meet specific performance requirements.