A kind of production method of composite coating strapping for gold and silver jewelry packaging

Abstract

A production method of a composite plated tie for packaging gold and silver jewelries comprises the following steps: carrying out cold rolling, carrying out routine degreasing, and annealing; making a belt: uncoiling, cutting to form strips, and burring; electroplating Cu at normal temperature; carrying out first time water washing, and drying; electroplating Sn or Zn at normal temperature; carrying out second time water washing, and drying; coloring; carrying out third time water washing, and drying; and routinely reeling. The thickness, the tensile strength and the elongation percentage of the above produced product are 0.1mm, 800-830MPa and 8-9% respectively. A uniform and compact Cu-Sn or Cu-Zn composite plated layer with strong adhesion and with the thickness of 3-5[mu]m is formed on the surface of the product; and the colored product has brilliant orange red or blue black appearance, and the gloss loss rate of the composite plated layer 540d later does not exceed 5%, so binding and packaging needs of gold finger rings, necklaces, bracelets, ruby, sapphire and other gold and silver jewelries are met.

Description

technical field [0001] The invention relates to a production method of a strap, in particular to a production method of a composite coating strap for gold and silver jewelry packaging. Background technique [0002] Gold and silver jewelry such as gold rings, necklaces, bracelets, rubies and sapphires are very valuable and special commodities, and special care must be taken when binding them. For the corresponding straps, first, it needs to have a thinner thickness to prevent damage to the jewelry surface due to the thicker size. The second is to have bright colors to enhance the appearance of jewelry and play a foil and decorative effect. The third is the need for appropriate strength. If the strength is too high, it is easy to damage the jewelry; if the strength is too low, it is easy to break the belt. [0003] At present, there are mainly two types of straps for binding gold and silver jewelry on the market: one is polymer straps. Although the production process is re...

AI Technical Summary

Problems solved by technology

However, this method also has two problems that are difficult to solve: one is that after a long period of exposure, the outer paint film is prone to aging, discoloration, cracking and peeling off, resulting in a significant reduction in the decorative effect

Second, due to the existence of the paint film, the straps cannot be connected by welding, and must be assisted by a steel lock

Therefore, it is not suitable for bundled packaging of gold and silver jewelry

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