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Overview of The Development of Fired Mould Precision Casting

First made of the wax model, and then in its exterior wrapped in a layer of clay and other refractory materials, heating so that the wax melted out, so as to obtain the formation of the shell by refractory materials, and then melt the metal into the shell, to be cooled after the metal refractory materials knocked to get metal mould parts, this process of metal is called lost wax precision casting, also known as investment casting or lost wax casting.

The lost wax precision casting has already existed in ancient times, as far as several hundred years BC, the ancient working people of China created this lost wax precision casting technology, used to precision casting with a variety of fine pattern and text of the bell and the vessel and other products. According to the expert identification, the manufacturing of the bronzes excavated in China during the Yin and Shang dynasties and the tomb of Zeng Houyi in the Spring and Autumn period used this very clever technique. The base of the Zeng Houyi tomb plate is made of several intertwined dragons, with their heads and tails connected and interlaced, forming a multi-layered cloud-like pattern hollowed in the middle. These patterns are difficult to manufacture with the ordinary precision casting process, and with the lost wax method precision casting process, you can use the characteristics of paraffin wax without strength, easy to carve, with ordinary tools you can carve the same paraffin wax material as the tomb of Zeng Houyi Zun plate to be obtained, and then additional pouring system, coating, dewaxing, pouring, you can get the exquisite Tomb of Zeng Houyi Zun plate. The use of this method also has a long history in the manufacture of metal jewelry as well as many non-metal crafts, and is still the main method for the production of many jewelry and crafts.

Modern fired mould precision casting is based on the development of ancient fired mould precision casting. During World War II, the Allied technical experts stationed in Baoshan, Yunnan Province, saw the local people using this method to produce handicrafts inspired by its improvement and used in the production of mechanical components, from then on this technology is rapidly developing around the world. Modern investment casting methods in industrial production is the practical application in the 1940s. At that time, the development of aviation jet engines, requiring the manufacture of complex shapes like blades, impellers, nozzles, etc., precise dimensions and surface finish of heat-resistant alloy parts. Because the heat-resistant alloy materials are difficult to mechanical processing, the shape of the parts is complex, so it can not or difficult to use other methods of manufacturing, so the need to find a new precision molding process, so drawing on the ancient handed down lost wax precision casting, after the improvement of materials and processes, modern investment casting methods in the ancient process based on the important development. The development of the aviation industry has promoted the application of investment casting, and the continuous improvement and perfection of investment casting has also created favorable conditions for the aviation industry to further improve performance. Subsequently, this advanced precision casting process has been a huge development, successively in the aviation, automotive, machine tools, ships, internal combustion engines, gas turbines, telecommunications instruments, weapons, medical equipment and tools and other manufacturing industries are widely used, but also for the manufacture of arts and crafts. In the past decade, investment casting has been moving forward at a high rate. The world’s major industrial countries to an average of 7% to 12% increase in the rate of special-purpose castings will be 30% of the alarming rate of increase, thus promoting the development of investment casting wax development technology.

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If you would like to have a question then get in touch today, we are ready to assist 24/7.
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