Ten minutes for you to read and understand the aluminum extrusion primer

First of all, to understand the formation of aluminum profiles, that is, aluminum ingots or bars through the three processes of melting and casting, extrusion and surface treatment. This results in aluminum profiles with different cross-section shapes. Aluminum ingot, aluminum bar, is the most primitive material of all aluminum profiles, the length of 8-12 meters, with a diameter of D90mm, D105mm, D120mm, D178mm the four kinds, the domestic conventional is 6063 material.

1, casting is the first process of aluminum production, the main process for the ingredients, melting, casting.

2、Extrusion is the means of profile molding, first through the sectional design to create a mold, and then use the extruder to extrude the heated round cast bar from the mold to form.

3、Surface treatment is the treatment of the profile surface, generally commonly used is anodized aluminum, to present a sand surface, bright white and oxidation coloring of the surface visual effects.

Finished aluminum profiles can be divided into two categories, one is the architectural aluminum profiles, mainly used in our daily life, such as aluminum doors and windows, aluminum curtain wall in our lives can be seen everywhere; the other is the industrial aluminum profiles, mainly used in industrial production and manufacturing, such as automated machinery and equipment, the skeleton of the protective cover, as well as companies according to their own machinery and equipment requirements of the custom mold, such as the assembly line Conveyor belts, elevators, dispensing machines, testing equipment, shelves and so on, electronic machinery industry and clean room with the majority.

Aluminum profile production process in brief：

Melting and casting

Melting and casting is the first process of aluminum production, the main process is:

(1) Ingredients: According to the specific H*** number that needs to be produced, calculate the amount of various alloy components to be added, and reasonably match the various raw materials.

(2) melting: the raw materials will be matched according to the process requirements to join the melting furnace melting, and through the de-gassing, de-slagging refining means of the melt within the slag, gas effectively removed.

(3) Casting: The molten aluminum liquid is cooled and cast into various specifications of round casting rods through deep well casting system under certain casting process conditions.

Squeezes

Extrusion is the means of profile molding. First according to the profile product cross-section design, manufacturing out of the mold, the use of extruder will be heated round cast bar from the mold extrusion forming. Commonly used grade 6063 alloy, in the extrusion also use an air-cooled quenching process and its subsequent artificial aging process, in order to complete the heat treatment strengthening. Different grades of heat treatable reinforced alloys have different heat treatment regimes.

Coloring (we'll focus on the oxidation process here first)

Oxidation: Extruded aluminum alloy profile, its surface corrosion resistance is not strong, must be through the anodic oxidation surface treatment to increase the corrosion resistance, abrasion resistance and the appearance of the aluminum aesthetics.

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Its main processes are:

(1) Surface pretreatment: chemical or physical methods of cleaning the surface of the profile, bare pure matrix, in order to facilitate the acquisition of a complete, dense artificial oxide film. Can also be obtained by mechanical means mirror or no light (matte) surface.

(2) Anodic oxidation: After the surface pretreatment of the profile, under certain process conditions, the substrate surface anodic oxidation occurs, generating a layer of dense, porous, strong adsorption of Al2O3 film layer.

(3) Pore sealing: the porous membrane pores of the porous oxide film generated after anodic oxidation are closed, so that the oxide film is anti-pollution, corrosion-resistant and wear-resistant performance is enhanced. The oxide film is colorless and transparent, using the strong adsorption of the oxide film before sealing the holes, adsorption and deposition of some metal salts in the membrane holes, which can make the appearance of the profile to show the color (silver-white) other than the color of many colors, such as: black, bronze, gold and stainless steel color.