The investment casting is a nearly finished form castings process. To obtain the tolerance requirements, this form requires little subsequent processing to machine tools.
The investment casting in ancient times. Some history
The microcast technique (or investment casting) was used by ancient peoples for the production of various bronze tools and objects, including also monumental statues of artistic value.
Until the last century, the main aim of the fusion of bronze, gold and silver objects was the reproduction of the form, the features of the artistic idea, other than dimensional accuracy.
The investment casting at the beginning of the 20th century
The need for dimensional accuracy emerged just at the beginning of the 20th century, when some technical dental laboratories began to use this process to create partial denture. During the Second World War, the investment casting technique was used on a large scale to manufacture turbine blades for turbo-jet planes. At the beginning of the 1950s, this technology also arrived in Europe. It was adopted in productive sectors that required steel or special alloys components with complex geometric shapes and with restricted dimensional tolerance.
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