General

Lost wax casting is one of the glass forming processes. The main content is heating glass to a very high temperature so as to have certain flowability, then flowing into a pre-made shell mould for forming. By lost wax casting, complicated shape and exquisite handicrafts can be created.

Manufacturing Process and Characteristics

The main content is heating glass to a very high temperature so as to have certain flowability, then flowing into a pre-made shell mould for forming. As castings are formed by removing out of wax moulds on the shell moulds, it’s called as lost wax casting. As the glass contained with lead oxide (commonly known as synthetic quartz) features high refractive index like diamonds and high liquidity in high temperature, synthetic quartz is commonly used as one material for casting different glass types. In the current Chinese market, English crystal created by the said lost wax casting is generally called as coloured glaze.

History

The lost wax casting process stems from the development of varieties of ancient casting processes. In late neolithic pottery period, Chinese ancient craftsmen have widely applied lost wax casting in manufacturing bronze workings.

Working Procedure

The working procedure of lost wax casting process contains

1. Mould Design
2. Mould Building
3. Wax Injection
4. Wax Mould Finishing
5. Implanting
6. (Weighting)
7. Shell Mould Creation
8. Backing Shell
9. Casting
10.Shaking
11.Sand Cleaning