Process of gold,silver coins
Compared to the general custom lapel pins, custom coins production process is a demanding, complex process area, artificial combination of skills and technology equipment, processing and manufacturing process. There are personalized coins,the back design, the Chinese number, reign; denominations are essential elements, which is a legal tender gold and silver medal in the nature of the general difference.
The first gold coin production process, the designer on three sides by three-dimensional form, the graphic design of artwork by means of the real sculpture reflected in the oil and gypsum on the soil.
In the first process is complete, staff will cast on the electrolyte, after striking patterns made of copper plated billet mold, also known as copper-based or parent die. Then touch engraving machine needle and burin synchronous sliding, would cast a three-dimensional patterns on the carved reduced in proportion to copy to another blank on the mold, which formed the original mold, also called sub-mode, the surface relief effect exactly the same with gold coins. The principle of the matching key, but much more than it is fine.
The original model also did not meet the requirements of hardness, so quenching to increase the hardness, and repeatedly punching, forming concave patterns, working model with mirror effect, and then work mold hardened to improve hardness, to prepare for when imprint use. Gold coins of the mold are generally made of special steel, carved with patterns and the surface is very hard, casting process, to set in gold silver surface display mirror effect.
In modeling the same time, another cake shop has begun the production of billet work.
Production workshop in the blank cake, precious metals will be selected into the furnace for melting raw material, and then poured into ingots (slot) or pressed into the cooling section thick film. According to reports, this time the purity of film section has reached more than a 3 9. Then, the thick film section into the hydraulic plant. Here, on the thick film to be rolled several times, making it the cake thickness requirements shall comply with blank film. Then, the semi-finished article into a blank chip press cake, waiting for further processing.
Gold coin production is in strict accordance with the implementation of The People’s Republic of China Bank of China promulgated the financial industry standard to enforce.
Gold ,silver embossed cake made from billet, the billet cake a direct impact on the quality of the finished product, so its handling is a key component. Stamping down from the billet Article cakes are generally rough, the surface is not smooth, surrounded by a flash, need for further finishing. Specific steps are: first place like a special cake mixer blank columnar annealing furnace, annealing furnace rotation. Temperature of the billet were softened bread. And then annealed to soften the blank after the cake into the diluted acid or soap solution to clean. Then a special cake for milling machines on the billet, polished. After treatment, the blanks can be used to imprint the coins.
After completion of the above, billet and mold on the bread into the embossing workshop. Cake from the Die cast machine to imprint into the coin blank, blank cake and mold commissioning after installation is complete, is to use die-casting machine to print proof, generates a kind of currency. Relevant departments for approval of the prototype, you can kind of money in accordance with standard mass production of the.
In fact the production process with the metal lapel pins is very similar, but with a precious metal, and requires much more detailed. This time everybody should be on the production of gold coins have a detailed understanding of it!