How ancient bronze is smelted

Mold casting is also known as lost wax method. Lost wax method is to use wax to make the mold to be cast into objects, and then in the wax mold coated with mud, which is the mud mold. After the clay mold is dried, it is baked into a ceramic mold. Once baked, all the wax molds are melted and lost, leaving only the clay molds. General production of mud molds left the pouring mouth, and then from the pouring mouth into the copper liquid, after cooling, the desired object is made.

China's lost wax method originated in the Spring and Autumn Period at the latest. Henan Xichuan under the temple 2 Chu tomb unearthed in the Spring and Autumn period of the copper ban is so far the earliest known lost wax castings. This copper ban four sides and sides are decorated with translucent cloud pattern, surrounded by twelve standing carved beasts, under the body **** there are ten standing carved animal feet. Translucent carving decorations complex and varied, the appearance of gorgeous and solemn, reflecting the mid-Spring and Autumn period of China's lost wax method has been relatively mature. After the Warring States, Qin and Han Dynasty, the lost wax method is more popular, especially during the Sui and Tang dynasties to Ming and Qing Dynasties, cast bronze using more than the lost wax method.

Lost wax method is generally used to make small castings. With this method of casting bronze neither Fan marks, and no traces of shims, with which casting hollow objects is better. China's traditional investment casting technology has a great influence on the world's metallurgical development. Modern industrial investment casting, is from the traditional lost wax method development. Although no matter in the wax material used, mold making, modeling materials, process methods, etc., they are very different, but their process principle is the same. In the mid-forties, the United States engineer Austin to create his name of the modern investment casting technology, from the traditional Chinese lost wax method has been inspired. 1955 Austin Laboratory made the first lost wax method of petition, Japanese scholars Deer take a man according to the history of China and Japan to use the lost wax method of the fact that the objections, and finally won the case.