Investment casting is a process of manufacturing bronze and other metal products using a combination of abrasive and acid substances. The initial process is dipped into a slurry of finely ground refractory material. The branch is then drained and the investment material is applied to its surface. The particle size of the investment material is extremely small, resulting in a smooth surface. Typically, ethyl silicate and fine silica are used as the refractory materials.
Stainless steel is a ferrous metal with added chromium for corrosion resistance. Stainless steel is available in different alloys, which vary in their chemical composition. These types are ideal for parts exposed to liquids and high temperatures. The 300 series and 400 series stainless steel are ideal for high-temperature applications and offer exceptional strength. Unlike other steel alloys, these types of steel do not require machining after casting. Because of their tight tolerances, investment casting is the preferred method for many types of metal parts.
The process is easy to learn. Unlike machining, investment casting is a one-step process that can produce modest volumes of parts within 24 to 48 hours. Once the mold is created, the molten metal is poured into it. When the part is cool, the mold is destroyed, and the finished product is a perfect replica of the original. The tolerances of investment casting are so tight, no machining is required, which means lower costs for your products.
Once the pattern is created, the investment casting process begins. The wax model is fixed to a sprue. In fact, hundreds of wax models can be fixed to the same sprue. The sprue is a large mold and is often used in the aerospace industry. A ceramic shell is then applied to the mold and the process begins. The clay is cooled with fans and blowers. The casting process is finished once the sprue is ready.
This process is also known as vacuum pressure casting. It uses gas pressure to minimize porosity. A vacuum pressure-casting machine usually has an upper and lower chamber. The upper chamber houses the crucible while the lower chamber contains the investment mould. A stopper connects the two sections. The pressure in the lower chamber is high, and the vacuum in the upper chamber is weak. Using this method reduces the amount of porosity and improves the surface finish of casted components.
Besides its versatility, investment casting allows for precise casting results. With this process, manufacturers can use carefully designed materials with virtually any property they require. The process is also cost-effective, as the tooling costs are low. Compared to other processes, this method is easy to implement in various industries. In fact, it is already used in a variety of industries, including medical devices, consumer goods, and consumer electronics. Aside from the automotive industry, many other sectors have embraced the benefits of this technology.