Uncover the mystery of the customized production process of extruded aluminum street sign blanks.
The production of extruded aluminum street sign blanks includes three main processes: casting, extrusion and oxidation:
Mysterious treatment of the production process of aluminum profile signs, extruded aluminum street sign blanks custom production process to understand:
1. Casting is the first process of aluminum profile production
The main process is:
(1) Composition: According to the specific alloy grade to be produced, the addition amount of various alloy components is calculated to reasonably match various raw materials.
(2) Smelting: The prepared raw materials are added to the smelting furnace for smelting according to process requirements.
(3) Casting: Under certain casting process conditions, the molten aluminum liquid is cooled and then cast into round casting rods of various specifications through a deep well casting system.
Demystifying the production process of aluminum profile signs
2. Squeeze
Extrusion is a way of contouring. Aluminum designs and manufactures molds based on the cross-section of the profile products, and uses an extruder to extrude the heated round cast rods from the mold.
6063 This alloy is a commonly used alloy. In the extrusion process, an air-cooling quenching process and subsequent artificial aging process are also used to complete the heat treatment strengthening. Different heat treatment strengthened alloys have different heat treatment systems.
3. Oxidation: The surface corrosion resistance of the extruded aluminum alloy profile is poor, and the surface treatment must be performed by anodizing to improve the corrosion resistance, wear resistance and appearance of the aluminum material.
The main process is:
(1) Surface pretreatment: Clean the surface of the profile by chemical or physical methods, and expose the pure substrate, which is conducive to obtaining a complete and dense artificial oxide film.
It is also possible to mechanically obtain a mirror or matte (matte) surface.
(2) Anodizing: Under certain process conditions, the surface of the contoured substrate subjected to pretreatment on the surface undergoes anodizing to form a dense, porous, strongly adsorbed AL203 film.
(3) Pore sealing: The pores of the porous oxide film formed after anodizing are closed to enhance the anti-pollution, corrosion resistance and wear resistance of the oxide film.
The oxide film is colorless and transparent. Before the sealing, the strong adsorption of the oxide film is used, and some metal salts are adsorbed and deposited in the pores of the film, which can make the outline appearance show many colors other than the original color (silver white), such as black and bronze.
The extruded aluminum street sign blanks are cast, extruded and oxidized in three steps to obtain a perfect surface and achieve perfect advertising and indication effects.
