Aluminum alloy profile production process

The production process of aluminum alloy profiles mainly includes the following key steps:

1. Mold making

Machining: Processing mold steel blanks on lathes and machining centers, including welding chambers and diversion holes.

Heat treatment: Perform heat treatment in a vacuum quenching furnace to enhance mold hardness.

Wire cutting: Machining the mold hole size through wire cutting.、

Electrical discharge: Perform electrical discharge machining to form the mold working area.

Polishing: Perform polishing treatment on the entire mold to ensure a smooth working surface, facilitating subsequent extrusion and inspection.

Nitrogenization: Strengthen the working belt strength of the mold to reach 53-54 degrees, improving durability.

2. Casting

Charge materials into the furnace: Prepare raw materials such as aluminum ingots and intermediate alloys in the corresponding proportions, and then place the aluminum ingots into the smelting furnace.

Melting: Using natural gas combustion to melt aluminum ingots, stirring to make its composition and temperature more uniform, and raising the temperature of the molten aluminum in preparation for adjusting its composition and refining.

Adjust the aluminum liquid composition ratio according to the alloy requirements.

Refining and slag removal: Removing slag and gas from the aluminum liquid to improve the quality of the aluminum liquid.

Let stand: used for precision filtering.

Casting: Continuous casting, producing aluminum bars of various specifications.

Homogenization: Aluminum rods are placed in a homogenization furnace for compositional uniformity treatment to eliminate residual stress in the ingots, improve processing performance, increase extrusion speed, and ultimately complete the production of aluminum rods.

3. Squeeze

Aluminum rod heating: control between 410 and 500 degrees.

Extrusion: Extrude profiles according to the principle of 'high temperature low speed and low temperature high speed'.

Straightening: By cold bending correction, straighten the profile to eliminate defects such as bending and twisting, while avoiding the formation of orange peel and surface unevenness.

Artificial aging: Strictly carry out aging treatment according to the aging process system to improve alloy strength.

Packaging into storage: Aluminum profiles that do not require surface treatment are packaged into storage after measurements of length, strength, and other series.

4. Surface treatment

Surface fluorocarbon treatment: Through electrostatic action, difluoroethylene is sprayed onto the aluminum alloy and its surface, resulting in a uniform color, excellent fade resistance, and superior stain resistance.

Powder coating: A powder coating is applied to aluminum alloy surfaces through electrostatic action, featuring strong adhesion, wear resistance, peel resistance, and UV resistance.

Oxidation: During the anodization process, aluminum alloys form an aluminum oxide film on the surface through electrolysis. Oxidized aluminum alloys can be electrolytically dyed to produce various colors.

Electrophoresis: Based on oxidation, a layer of water-soluble acrylic paint film is covered on the oxide film through electrophoresis, which will give the profile stronger water resistance, wear resistance, scratch resistance, and a smoother and more aesthetically pleasing surface.