How are Investment Castings Made?
Developing investment castings involves creating an original wax model, coating the image with plaster and building of successive layers until a strong shell envelopes the model. After melting out the wax, molten gold or bronze will be poured into the mold, creating a perfect duplicate of the original wax pattern. Compared to machining apart, investment casting can economically offer undercuts, high definition, complex detail and a smooth surface finish.
Most often, investment casting is the only way a part can be economically manufactured.
The Investment Casting Process
Why Is it Called Investment Casting?
Investment casting refers to the ceramics formed around the wax patterns to create a casing for molten metal to be poured. Once the wax models are created, they are melted onto a gate sytem, dipped into slurry and sand to form a layered casing, then replaced with the melted metals such as stainless steel, aluminum, and many more. Below are some short videos with some of the steps in the investment casting process.
Investment Casting Material Properties
Our factory can produce castings from a few grams to more than 40 pounds. Our typical dimensional accuracy is +/-.005”, per inch, when required. Milwaukee Precision Casting experts can assist you in developing a new casting design. Milwuakee Precision Casting has the ability to furnish secondary operations, such as non-destructive testing, plating or coating, heat treat and assembly. We are proactive in concurrent engineering and design assistance and offer some of the shortest lead times in our industry.
Milwaukee Precision Casting is committed to excellence and has the capability to produce the items you need. Our commitment to quality and on-time delivery has made us a leader in the investment casting industry. Milwaukee Precision Casting has very competitive pricing. By providing castings to shape, we can eliminate most, if not all secondary machining operations.
What Are Lost Wax Investment Castings?
We produce investment castings in lost wax patterns from a few grams up to 40 pounds, and can economically produce low quantities with manual tooling, or high volumes utilizing multi-cavity automatic molding tools. By injecting wax into a permanent-molding die to form wax patterns, investment casting became the solution for many complex parts that are required in large quantities.
History of Lost Wax Investment Castings
The origin of the lost wax investment casting, also known as the lost wax process, stretches back in time to 1100/1700 BC. Works were created from hand sculptured wax patterns with delicate detail as sophisticated as any precision investment casting produced today.
Industrial America paid little heed to the capabilities of lost wax investment casting until WWII, when sudden military demands overtaxed the machine tool industry.
During the postwar period, this process has evolved and expanded into virtually every industry and marketplace, as seen today. Milwaukee Precision Casting, Inc. has become a leader in the manufacturing of lost wax investment castings.
Why Precision Investment Castings?
Milwaukee Precision Casting, based in Wisconsin, has been a leading foundry for investment castings since 1993. Our combination office and foundry allows us to build and create custom, precision investment casting parts that fit your specifications. All of our parts are made in the USA and can be distributed throughout the country.
Since we are a full service foundry, our services allow for quality assurance testing, heat treatments, non-destructive testing and many others. Our variety of materials have given us expertise to find the perfect fit for you application.