According to use

1. Building aluminum profiles (divided into doors, windows and curtain walls)

2. Aluminum profile of radiator.

3. General industrial aluminum profiles: mainly used in industrial production and manufacturing, such as automatic machinery and equipment, the skeleton of enclosure, and mold opening customized by companies according to their own mechanical equipment requirements, such as assembly line conveyor belt, elevator, glue dispenser, testing equipment, shelves, etc., and are mostly used in electronic machinery industry and clean room.

4. Aluminum alloy profile of rail vehicle structure: mainly used for manufacturing rail vehicle body.

5. Mount aluminum profiles, make aluminum alloy picture frames, and mount various exhibitions and decorative paintings.

According to alloy composition

Aluminum profiles can be divided into 1024, 2011, 6063, 6061, 6082, 7075 and other alloy brands, of which 6 series is the most common. The difference between different brands lies in the different proportions of various metal components. Except for commonly used aluminum profiles for doors and windows, such as 60 series, 70 series, 80 series, 90 series and curtain wall series, there is no clear model for industrial aluminum profiles.

Surface treatment

1. Anodized aluminum

2. Electrophoretic coating of aluminum materials

3. Powder spraying aluminum material

4. Wood grain transfer aluminum

5. Fluorocarbon sprayed aluminum material

6. Polishing aluminum (divided into mechanical polishing and chemical polishing, of which chemical polishing is more expensive and expensive)

What are the classifications of aluminum alloy profiles according to surface treatment forms?

1. Anodized aluminum alloy profiles for buildings

Silver white, white, bronze, titanium gold, black gold, mirror polishing and sand polishing (Poly Shun) series.

2. Electrophoretic coating of building aluminum alloy profiles

Silver-white electrophoresis, bronze electrophoresis, titanium gold electrophoresis, scrub electrophoresis.

3. Powder spraying aluminum alloy profiles for buildings

Ultra-weather-resistant powder spraying refers to spraying a layer of powder coating on the surface of aluminum alloy matrix through electrostatic adsorption. The coating has strong weather resistance and ultraviolet resistance, and has various color series.

4. Fluorocarbon spraying aluminum alloy profiles for buildings

Fluorocarbon spraying refers to spraying polyvinylidene fluoride paint coating on the surface of aluminum alloy matrix by electrostatic action. Fluorocarbon coating has long-lasting color retention, corrosion resistance, aging resistance and air pollution resistance. Its fluorocarbon bond is one of the strongest molecular bonds known at present, and its color series is diverse.

This paper introduces the fluorocarbon spraying process of aluminum alloy profiles.

Aluminum alloy profile is a kind of non-ferrous metal structural material which is widely used in industry.

Pretreatment process: degreasing and decontamination of aluminum → water washing → alkaline washing (degreasing) → water washing → acid washing → water washing → chromizing → water washing → pure water washing.

Spraying process: spraying primer → topcoat → finishing paint → baking (180-250℃)→ quality inspection.

The multi-layer spraying process consists of three spraying (referred to as three spraying for short), primer, topcoat and topcoat and secondary spraying (primer and topcoat).

1, the purpose of pretreatment

Before spraying aluminum alloy profiles and plates, the surface of the workpiece should be degreased, decontaminated and chemically treated to produce a chromized film, which will increase the adhesion between the coating and the metal surface and the anti-oxidation ability, which is conducive to prolonging the service life of the paint film.

2. Primer coating

As a primer coating for sealing the substrate, its function is to improve the anti-permeability of the coating, enhance the protection of the substrate, stabilize the metal surface layer, strengthen the adhesion between the top coat and the metal surface, and ensure the color uniformity of the top coat. The thickness of the paint layer is generally 5-10 microns.

3. Topcoat coating

Topcoat coating is the key layer of spray coating, which is to provide the decorative color needed by aluminum, make the appearance of aluminum meet the design requirements, and protect the metal surface from external environment, acid rain and pollution, prevent ultraviolet rays from penetrating, and greatly enhance the anti-aging ability. Topcoat coating is the thickest paint layer in spray coating, and the thickness of paint layer is generally 23-30 microns.

4, finish paint coating

The topcoat coating, also known as varnish coating, is mainly aimed at effectively enhancing the external corrosion resistance of the paint layer, protecting the topcoat layer, increasing the metallic luster of the topcoat color, and making the appearance more vivid and dazzling. The coating thickness is generally 5-10 microns, and the total thickness of the three spray coatings is generally 40-60 microns, which can be thickened if necessary.

5, curing treatment

The third spray coating generally needs secondary curing, and the aluminum material enters the curing furnace for treatment. The curing temperature is generally between 180℃ and 250℃, and the curing time is 15-25 minutes. Different fluorocarbon coating manufacturers will provide the best temperature and time according to their own coatings, and some chlorine carbon spraying plants (oil plants) also change the secondary curing to primary curing according to their own experience.

6. Quality inspection

Quality inspection should be in accordance with AAMA-605.02.90 standard, and strict quality inspection can ensure high-quality sprayed products.

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