The invention belongs to the field of a vacuum coating process for a metal product, in particular to a vacuum coating process for an aluminum alloy hub. The vacuum coating process comprises the following steps: (1) pre-treating an aluminum alloy hub blank; (2) spraying and drying bottom powder which comprises epoxy resin and is sprayed in an electrostatic spraying way; (3); polishing and washing the bottom powder body; (4) spraying and drying medium powder which comprises novolac epoxy resin and is sprayed in the electrostatic spraying way; (5) performing vacuum coating, namely performing vacuum coating in a vacuum magnetron sputtering coating way; (6) spraying a finishing varnish; (7) obtaining a finished product and inspecting and packaging the finished product. The vacuum coating process disclosed by the invention has the advantages of being simple and convenient to operate, high in coating efficiency, free of pollution of three wastes and high in combination degree, flatness, glossiness, hardness and corrosion resistance of a coating layer.

Vacuum coating process for aluminum alloy hub

The invention provides a spraying surface treatment process for an aluminum product. Waxing grinding, wiping and electrostatic dust removal are carried out on the aluminum product; the bottom layer spray coating is carried out on the aluminum product, the primary baking is carried out at 50 to 58 DEG C, and the baking time is 26 to 30 minutes; adhesive tapes are pasted after the baking, then, the waxing grinding, the wiping and the electrostatic dust removal are carried out, next, the secondary spray coating is carried out, the secondary baking is carried out at 45 to 50 DEG C, an the baking time is 40 to 44 minutes; the adhesive tapes are torn, the dust is removed, then, the printing and the baking are carried out, and materials are collected; and finally, the package is carried out. The protection performance is good, the service life of workpieces can be prolonged, secondly, the decoration effect is realized, the attractive appearance and the delightful function are reached, the surface quality is extremely high, the paint film thickness is uniform, and the paint transfer efficiency is extremely high and can reach higher than 85 percent.

Spraying surface treatment process for aluminum product

The invention discloses a metal alloy imitation hexavalent chromium color high-corrosion-resistant dry surface processing method, which relates to a metal alloy dry surface processing method. The processing method comprises the following steps of: carrying out physical paraffin removal and oil removal processing on a metal alloy blank; then carrying out organic matter sealing processing, and drying; spraying ultraviolet (UV) primer, leveling and carrying out UV curing by placing the metal alloy blank on a UV painting line; after the metal alloy blank is hung in a physical vapor deposition (PVD) furnace to be subjected to plasma processing, carrying out PVD film coating processing so as to satisfy various requirements on functions and colors, and carrying out the multi-layer PVD film layer film coating technology to improve the corrosion resistance of the PVD coated film; spraying UV intermediate paint, leveling and carrying out UV curing again by placing the metal alloy blank on the UV painting line; spraying transparent UV finish paint, leveling and carrying out UV curing; and blending the color of electroplated hexavalent chromium metal in the intermediate paint to obtain the metal alloy subjected to the imitation hexavalent chromium color high-corrosion-resistant dry surface processing.

Metal alloy imitation hexavalent chromium color high-corrosion-resistant dry surface processing method

A full-automatic coating production line relates to the technical field of coating devices and comprises a coating pretreatment device (1), a dedusting device (2), an automatic spraying system (3), a drying cooling device (4), an ultraviolet (UV) solidifying device (5), a dustless purifying device (6) and a waste gas treatment device (7) which are sequentially connected, and a high-voltage electrostatic generator is adopted for the dedusting device (2) to remove dust The full-automatic coating production line can perform continuous production, is high in yield and even in coating surfaces, leaves no dead angles in desuting, and is high in production efficiency, clean, energy-saving and free of pollution

Full-automatic coating production line

The invention relates to an automobile lamp coating technology. The automobile lamp coating technology comprises the following steps that S1, pretreatment is conducted; S2, the bottom layer is subjected to leveling treatment; S3, electrostatic dust collection is conducted; S4, aluminum film coating is conducted; and S5, protective film coating is conducted. The automobile lamp coating technology provided by the invention can effectively avoid the phenomenon that the adhesive force of a film layer is reduced due to impurities existing on the surface of a workpiece, meanwhile, the reflectivity of an automobile lamp is ensured, and the coating quality of the automobile lamp is ensured.

Automobile lamp coating technology

The invention discloses an aluminum alloy wheel hub film-coating process. The aluminum alloy wheel hub film-coating process comprises the steps of oil removing, cleaning and drying, pre-treating, epoxy polyester powder spraying and solidifying, grinding I, methyl methacrylate-acrylate copolymer paint spraying and solidifying, grinding II, polybutadiene high temperature-resistant insulating film-coating spraying and solidifying, vacuum cathode arc ion chromium plating and magnetism control sputtering aluminum plating, and polyurethane methacrylate light solidifying paint spraying and solidifying sequentially. The invention adopts dry electric plating to replace the traditional wet electric plating, the plating layer surface quality and the physical and chemical properties are approximatelyequivalent to that of the wet electric plated aluminum alloy wheel hub, the chromium consumption is reduced to about one fifth of the wet electric plating, the water consumption is reduced to about one seventh of the wet electric plating, precious nickel and copper are not utilized, the poisonous metal substance such as hexavalent chromium is not contained, the pollution to the environment is reduced, the energy, water and precious metal consumption is remarkably reduced, the technological flow is simplified, the production efficiency is enhanced, the heavy polishing working sequence is omitted, the working condition is remarkably improved, and the cost is reduced.

Film coating process for aluminium alloy wheel hub

The utility model discloses an aluminum alloy wheel hub, which comprises an aluminum alloy base body, and a prime coat, a vacuum filming layer and a top coat are coated on the aluminum alloy base body in sequence from bottom to top. The utility model adopts a dry coating method to replace a traditional wet electroplating method, the quality on the surface of the coating layer and the physical chemical property are basically corresponding to the wet electroplating aluminum alloy wheel hub, the dosage of chromium is about one fifth of original dosage, more precious nickel and copper are not used, the hexavalent chrome and other poisonous metal matters are not contained, the pollution to environment is reduced, the energy consumption is about one second to one third of the energy consumption of the wet electroplating, the water consumption is about one seventh of the water consumption of the wet electroplating, the laborious polishing working procedure is omitted, the labor condition is obviously improved, and the whole production cost is about one second of wet electroplating cost.

Xiaoyun Wu

Papers

Film coating process for aluminium alloy wheel hub

Aluminium alloy wheel hub