Investment casting (also known as investment casting, lost wax casting) is a metal forming technique used to form near-net shape products. The basic casting principle of investment casting molds is to pour and fill molten metal into a disposable ceramic mold. Then , the molten metal adapts to the shape of the mold and forms the final product. The technology has been around for thousands of years until the Bronze Age. Although it sounds like an old trick, R&D is still going on. Even today, foundries are still Efforts are made to continuously improve the quality of cast products. Therefore, precision casting is one of the longest-running advanced metal forming technologies in human history.
The core processes of precision casting are mould making and metal casting, where our wax and excess metal parts are recovered and reused during the manufacturing process.
Precision casting mould making:
First, the wax mold is created as a model of the final product. Then, the wax mold is assembled into a wax mold tree. Subsequently, the wax mold tree is assembled into a metal conveying system to improve casting efficiency.
Next, dip the wax mold tree into the ceramic slurry so that the ceramic shell covers the wax mold tree. The ceramic shell adapts to the shape of the wax mold tree and forms a disposable ceramic mold. Later, the mold is dried.
The dipping is repeated to increase the thickness of the ceramic shell, as thicker shells provide higher mold strength. After the first coat, plaster is applied to the ceramic shell.
Remove the wax from the mold (lost wax). Therefore, this dewaxing leaves a negative cavity for later metal filling.
After dewaxing, the mold is fired before the metal casting. The residual scrap inside the mold is fired, the mold is sintered, and the mold is preheated for subsequent precision casting mold manufacturing.