The main production technology of gold jewelry:
1. Melting gold: The gold in the timely crucible (high-temperature crucible) is burned with acetylene flame to melt it into a raw material suitable for processing ornaments. (Equipment and facilities: acetylene, timely crucible)
2. Mould inversion: the gold ingredients are melted by a high-frequency or intermediate-frequency centrifugal casting machine, and then poured into a gypsum mould to be cast into blanks. (Equipment and facilities: medium frequency centrifugal casting machine, gypsum mold)
3. Pressure maintaining: the castings are welded, filed and hammered with auxiliary tools such as ring iron and pit iron to repair the deformation and surface roughness in the casting process. (Equipment and facilities: ring iron, pit iron, fire grab, file and hammer)
4. Polishing: the process of polishing the surface of the blank with a magnetic polishing machine or a roller polishing machine. (Equipment and facilities: magnetic polishing machine, roller polishing machine)
5. Calendering: Use agate knife to touch the gold surface and rub the workpiece to make the surface of the workpiece shine. (Equipment and facilities: agate knife)
6. Carving: Carve patterns on the product surface with a lathe with a diamond carving knife. (Equipment and facilities: diamond turning tools and lathes)
7. Inspection: The quality inspector carries out quality inspection on the ornaments.
Causes and links of gold jewelry loss
(1) Gold melting causes losses (high temperature, long time, and much oxidation and volatilization of gold).
⑵ Oxidation loss of inverted mold during casting.
(3) Losses caused by filing, shaping and other processes.
(4) When the car runs out, the particles are gone.