How are the gold ornaments of Shenzhen HSBC Gold Trading Co., Ltd. processed?

Gold jewelry is a precious metal made of unwrought gold, which is made of (unwrought gold and unwrought silver) in proportion, while gold inlaid jewelry is a precious metal made of unwrought gold and unwrought silver in proportion with other inlaid materials used in jewelry (such as diamonds, precious stones, semi-precious stones and pearls).

General processing technology of gold jewelry;

Melting gold: burning gold in a timely crucible with acetylene flame, and smelting it into components suitable for processing decorations by B.

Reverse mould: gold is melted by high-frequency or intermediate-frequency centrifugal casting machine, and then poured into gypsum mould for casting.

Polishing: In order to make the casting surface shiny, magnetic force or roller polisher can be used.

Hold the mold: repair the deformation and rough surface of the casting during casting, and weld, file and hammer the casting with tools such as ring iron and pit iron.

Calendering: agate pen touches the surface of semi-finished gold jewelry and rubs the workpiece to make the surface of semi-finished gold jewelry bright.

Chehua: making patterns on the surface of the product by a lathe equipped with a diamond chehua knife.

After the test, the finished product is put into storage.

The reason and relationship of gold loss: melting gold-reversing mold-polishing-holding mold-calendering-car flower.

Cause of wear loss: loss of molten gold (high temperature environment makes more gold oxidized and volatilized for a long time). The loss caused by the steps such as file edge in the process of burning and casting, and the loss caused by particle loss during flower turning.