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Hardware Electrical Casting Technology Has Also Been Greatly Developed

Hardware Electrical Casting is the use of metal electrolytic deposition principle to accurately copy some of the complex or special shape of the workpiece special processing methods. It is a special application for plating. The Hardware Electrical Casting was made by the Russian scholar Б.С. Jacob was invented in 1837.

principle

Hardware Electrical Casting was originally used primarily for the reproduction of metal works of art and prints, and at the end of the 19th century it was used to make record dies, and the scope of application was gradually expanded. The basic principle of Hardware Electrical Casting is to make the prototype in advance according to the desired shape as the cathode, with electroformed material as the anode, together with the anode material into the same metal salt solution, through the direct current. Under the electrolysis, the original mold surface gradually deposited metal electroformed layer, to achieve the required thickness from the solution removed, the electroformed layer and the original mold separation, will be obtained with the original mold shape of the metal copy.

classification

Hardware Electrical Casting can be divided into three categories, namely decorative plating (nickel - chromium, gold, silver as the representative), protective Hardware Electrical Casting (represented by galvanized) and functional plating (represented by hard chrome plating). Hardware Electrical Casting is one of the electroplating of the product using electroplating. Hardware Electrical Casting process is a modern technology, the principle and the same plating. In the casting solution, the female mold for the casting, surface activation treatment after the conductive layer, connected to the current, electrophoresis in the electric field gradually deposited in the gold mold on the casting, to a certain thickness can be removed. And then polished welding, surface treatment, that is a beautiful electroformed jewelry.

use

The main purpose of Hardware Electrical Casting is the precise reproduction of fine, complex and difficult to use other methods of processing the special shape of the mold and the workpiece, such as making banknotes and stamps of the printing plate, record stamping, word mold, plastic mold, mold , Metal works of art copies, mirrors, surface roughness samples, microporous filter, dial, EDM processing electrodes, high-precision diamond grinding wheel matrix.

Electroformed products to adapt to many industries: mobile phones, digital, home appliances, computers, cars, hardware, toys, high-end gifts. Electroformed products generally do not fade, quite suitable for: mobile phone keys, digital buttons, camera decoration, computer light guide plate, car lights, road reflectors, DVD, audio, toys, models and so on.

metal

Electroformed metal is usually copper, nickel and iron 3, sometimes with gold, silver, platinum nickel - cobalt, cobalt - tungsten and other alloys, but the most widely used nickel Hardware Electrical Casting. Electroformed layer thickness is generally 0.02 to 6 mm, also has a thickness of 25 mm. The size error of the cast and the original mold is only a few microns.

The original model

The original mold material is gypsum, wax, plastic, low melting point alloy, stainless steel and aluminum. The original mold is generally used for casting, cutting or engraving and other methods of production, for the fine small mesh or complex patterns, can use photographic plate technology. The original mold of non-metallic materials must be subjected to conductive treatment, the method has coated with conductive powder, chemical coating and vacuum coating.

For the original mold of the metal material, an oxide film is formed on the surface or coated with a graphite powder so as to peel off the electroformed layer.

Operation equipment

Hardware Electrical Casting equipment consists of Hardware Electrical Casting trough, DC power supply (usually 12 volts, several hundred to several thousand years) and Hardware Electrical Casting solution temperature, stirring, circulation and filtration equipment. The electroformed solution is an aqueous solution containing sulphates, sulfamates, fluoroborates and chlorides containing electroformed metal ions. The main drawback of Hardware Electrical Casting is the low efficiency, typically the thickness of the electroformed metal layer per hour is 0.02 to 0.05 mm. The use of high concentration of electroformed solution, and appropriate to improve the temperature of the solution and strengthen the mixing and other measures can improve the current density, shorten the casting time, which can improve the Hardware Electrical Casting efficiency. This method has been used in Hardware Electrical Casting of nickel.

History

It is said that Hardware Electrical Casting began in 1838. At that time, the Soviet Union Jacoli in the gypsum mother coated with paraffin, through the graphite to its surface with conductivity, and then the surface of copper, after plating stripping, made of copper replicas. Japan's early years of the Showa era, the Kyoto City Industrial Research Institute and the Osaka Mint and other units have been actively carried out in the gypsum master cast copper, in the insulator plating and other aspects of research, and produced a lot of fine metal crafts. However, the use of gypsum or wax as the mother mold for Hardware Electrical Casting, not only the manufacturing requirements of high, operational trouble, and the mother is easy to break, it is difficult to produce exquisite replicas, so the application of Hardware Electrical Casting is very limited.

Later, due to the advent of plastic matrix materials and electroplating level, Hardware Electrical Casting technology has also been greatly developed, and widely used in the manufacture of other methods can not be manufactured or difficult to process the urgent need for products. Especially in recent years, because Hardware Electrical Casting for the manufacture of aerospace or atomic energy of certain parts, it has been as a cutting-edge processing technology for people's attention. In addition, the so-called "electric bonding technique" in which metal and metal are combined by electroplating are also studied. This combination of metal does not change the mechanical properties and physical properties of the metal.


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Address: No.238, Qiushe Road, Qiushe Industrial Park, Tongli Town, Wujiang District, Suzhou City, Jiangsu, 215200, P.R.China
Tel: +86-512-633758+86-608
 Fax:86-512-63370558
 E-mail:szxsjm@sohu.com
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