Aluminum alloy die casting surface treatment are what

- Apr 29, 2019-

Aluminum alloy die casting has incomparable advantage over other castings, such as beautiful, light quality, corrosion resistance and other advantages, make it popular with the public, especially in the automotive lightweight, aluminum alloy castings has been widely used in the automotive industry, especially after surface treatment is more beautiful, more popular among consumers.

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A, powder spraying (powder spray) : powder spraying equipment is used to spray powder coating to the surface of the workpiece, in the electrostatic effect, the powder will be evenly adsorbed on the surface of the workpiece, forming a powder coating. Powder coating after high temperature baking leveling curing, into powder coating of different kinds of effects of the final coating; Powder spraying is superior to painting technology in mechanical strength, adhesion, corrosion resistance, aging resistance and other aspects, and the cost is also under the same effect of painting. Spray powder, generally divided into outdoor powder and indoor powder. Grain can be adjusted into a variety of effects, such as smooth surface, sand grain, foaming.

Two, paint treatment: the real paint process is aluminum alloy phosphating after spraying, spraying and then baking, such a coating is not only anticorrosive and bright wear-resisting, not easy to fall off.


Surface pretreatment: oil removal, water washing, rust removal, water washing, surface adjustment, water washing, phosphating, water washing, water washing and drying.


The lacquer that bake is the purpose of the pretreatment in order to get good coating, due to the above stamping parts during the manufacturing, processing and handling, preservation grease, the oxide scale, dirt, rust and corrosion on the surface, if not remove will directly affect the performance of the coating appearance, etc., so the pretreatment occupies very important position in the coating process.


Three, oil injection processing: oil injection is the name of the surface coating processing of industrial products, oil injection processing is generally engaged in plastic oil injection, screen printing, pad printing processing; EVA, rubber and other shoe material color change, silk screen printing. Have spraying line, silk screen printing line, pad printing machine and other equipment, and according to customer requirements, the production of high temperature resistance, friction resistance, uv resistance, alcohol resistance, gasoline and other products. Processing scope: electronic products: ordinary spray paint, PU paint, rubber paint (feel paint), can be sprayed injection molding processing encountered difficult to solve problems, such as gas lines, welding seams, etc., with spray rubber paint (feel paint) experience, feel paint rework technology.


Four, oxidation treatment: aluminum alloy surface oxidation, suitable for conductive oxidation, aluminum or aluminum profile, suitable for anodic oxidation.


Aluminium alloy oxidizes color to have ecru commonly, sky blue. Anodic oxidation is carried out in the case of high-voltage, it is an electrochemical reaction process; Conductive oxidation does not need to be electrified, but only need to soak in the potion, it is a pure chemical reaction. Anodic oxidation takes a long time, often dozens of minutes, while conductive oxidation takes only a few tens of seconds.


Five. Sand blasting treatment: spray a layer of fine sand on the surface of aluminum alloy products to enhance the friction coefficient of the contact surface and enhance the reliability of the connection. Sand has different thickness and grain.


Six, electroplating treatment: electroplating is the use of electrolysis to make the metal or alloy deposition on the surface of the workpiece, in order to form a uniform, dense, good adhesion of the metal layer process, called electroplating. A simple understanding is a physical and chemical change or combination. Electroplating process we are generally used for the following purposes: anti-corrosion, protection decoration, anti-wear.


Aluminum alloy die casting surface treatment generally: spray powder (namely powder spray), paint, spray oil, oxidation, sandblasting, electroplating and so on. The thickness that handles according to the product, smooth degree is different will divide.

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