Casting

Investment Casting

Investment casting is an industrial process based on lost-wax casting, one of the oldest known metal-forming techniques. Investment casting is valued for its ability to produce components with accuracy, repeatability, versatility and integrity in a variety of metals and high-performance alloys.

The fragile wax patterns must withstand forces encountered during the mold making. Much of the wax used in investment casting can be reclaimed and reused. Lost-foam casting is a modern form of investment casting that eliminates certain steps in the process. Investment casting de-rives its name from the pattern being invested (surrounded) with a refractory material. Many ma-terials are suitable for investment casting; examples are stainless steel alloys, brass, aluminum, carbon steel and glass. The material is poured into a cavity in a refractory material that is an ex-act duplicate of the desired part. Due to the hardness of refractory materials used, investment casting can produce products with exceptional surface qualities, which can reduce the need for secondary machine processes. Water glass and silica sol investment casting are the two primary investment casting methods nowadays. The main differences are the surface roughness and cost of casting. Water glass method dewaxes into the high-temperature water, and the ceramic mold is made of water glass quartz sand. Silica sol method dewaxes into the flash fire, and silica sol zircon sand makes the ceramic mold. Silica sol method costs more but has the better surface than water glass method. The process can be used for both small castings of a few ounces and large castings weighing several hundred pounds. It can be more expensive than die casting or sand casting, but per-unit costs decrease with large volumes. Investment casting can produce compli-cated shapes that would be difficult or impossible with other casting methods. It can also pro-duce products with exceptional surface qualities and low tolerances with minimal surface finish-ing or machining required.

The strength of Haizol for Investment Casting
We are partnering with the best supplier in the latest Investment Casting processes with proprie-tary technology to deliver high quality, low cost custom made machined components from Asia. The whole ordering process is transparent and you will get update of your order with our Order Monitoring System.

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