Can aluminum coil be painted?

Why coat metal?

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Aluminum coils or galvanized steel strip is painted and baked twice in coating lines to ensure high resistance and an appealing appearance. For exterior grade panels, it is painted with PVDF Kynar 500 fluorocarbon coating. For interior grade panels, it is painted with polyester coating.

Benefits

• Utilize high precision rolling coater with excellent quality of coating layer.
• It is suitable for coating with Acrylic, Polyester, Polyvinylidene and Fluoride (PVDF).
• Designed to fit the area of customer's factory.
• A fine coating layer meets international standard.
• Easy to operate and control, and provide online operation training.
• Coater consists of PU and Chromate coating rollers with advantages as

PU roller

Available for a full coat. Matted surface effect. Adapt to the wooden granite pattern effect. Coating thickness can be thin or thick. Minor impurities won&#;t easily cause surface defects.

Chromate roller

Applicable for thinner coils.&#;The coated surface is high gloss and delicate. Coating thickness can be thicker. The roller is abrasion resistant and sustainable. Lower maintenance costs.

Aluminum Coil Coating Line Process Flow in Production Line

Two Coat Two Bake Lines Process Flow in Production Line

Aluminum Coil Coating Line Specification

Item & Type CCL--AL25 CCL--AL40   GAS ELECTRICITY GAS ELECTRICITY Line Speed 25M/min 25M/min 40M/min 40M/min &#; Strip Width 1,000&#;1,600 mm / 1,000&#;2,000 mm 1,000&#;1,600 mm / 1,000&#;2,000 mm 1,000&#;1,600 mm / 1,000&#;2,000 mm 1,000&#;1,600 mm / 1,000&#;2,000 mm Strip Thickness 0.12 &#; 0.7 mm 0.12 &#; 0.7 mm 0.15 &#; 0.8 mm 0.15 &#; 0.8 mm Coil O/D 1,200 mm 1,200 mm 1,200 mm / 1,300 mm 1,200 mm / 1,300 mm Coil I/D Ø405 mm&#;Ø508 mm Ø405 mm&#;Ø508 mm Ø405 mm&#;Ø508 mm Ø405 mm&#;Ø508 mm Coil Weight 3,000 kgs / 5,000 kgs 3,000 kgs / 5,000 kgs 3,000 kgs / 5,000 kgs 3,000 kgs / 5,000 kgs Paint Type Polyester, PVDF, SMP, Epoxy, Acrylics Urethanes Polyester, PVDF, SMP, Epoxy, Acrylics Urethanes Polyester, PVDF, SMP, Epoxy, Acrylics Urethanes Polyester, PVDF, SMP, Epoxy, Acrylics Urethanes Line Space Dimension 52,000L x 8,000W x 5,500H mm 52,000L x 8,000W x 5,500H mm 60,000L x 8,000W x 5,500H mm 60,000L x 8,000W x 5,500H mm Line Weight 42,000kgs (approx.) 44,000kgs (approx.) 48,000kgs (approx.) 50,000kgs (approx.) Line Power 125HP / 60KW 125HP / 800KW 178HP / 60KW 178HP / 1,280KW Water Consumption (Soft Water) 300 ~ 600 L/min for cooling tower recirculation used 300 ~ 600 L/min for cooling tower recirculation used 300 ~ 600 L/min for cooling tower recirculation used 300 ~ 600 L/min for cooling tower recirculation used Compressed Air Consumption 0.8 ~ 1.5 M³/hr 0.8 ~ 1.5 M³/hr 0.8 ~ 1.5 M³/hr 0.8 ~ 1.5 M³/hr

 

• The above specification is for reference only.
• ALUMAX has the right to make any change.

Two Coat Two Bake Lines Specification

Item & Type CCL--AL30 (2C2B) CCL--AL45 (2C2B) CCL--AL60 (2C2B) Coating paints Polyester, SMP, PVDF, Epoxy, Acrylics Urethanes Polyester, SMP, PVDF, Epoxy, Acrylics Urethanes Polyester, SMP, PVDF, Epoxy, Acrylics Urethanes Production speed 30 M/min.(Max.) 45 M/min.(Max.) 60 M/min.(Max.) Oven Heating NG / Electricity NG / Electricity NG / Electricity Material Aluminum Coil Aluminum Coil Aluminum Coil & Galvanized Steel Product Thickness 0.2-1.0 mm 0.2-1.0 mm 0.2-1.0 mm Product Width 1,000- mm 1,000- mm 1,000- mm Coil O/D Ø1,400 mm Ø1,500 mm Ø1,800 mm Coil I/D Ø405 mm&#;Ø508 mm Ø405 mm&#;Ø508 mm Ø405 mm&#;Ø508 mm Coil Weight 5,000 kgs(max.) 7,000 Kgs(max.) 10,000 Kgs(max.) Compressed Air Consumption 0.2~1.2 m³/min @ 0.7MPa Clean & Dry 0.2~1.2 m³/min @ 0.7MPa Clean & Dry 0.2~1.2 m³/min @ 0.7MPa Clean & Dry

Introduction

Color-coated aluminum coil is a product obtained by coloring the surface of an aluminum coil. Because of its high-cost performance, it is widely used in aluminum ceilings, roof surfaces, scrap steel, cans, aluminum veneer curtain walls, and other industries. So in addition to the feature of the high-cost performance, does this product have other advantages?

1. Why use a coating aluminum coil?

Bright colors and strong decoration

The color-coated aluminum coil has a real sense of physical hierarchy, bringing people a sense of freshness and elegance. Moreover, different colors are not static and can be customized according to the specific development needs of enterprise customers. The performance of decorative materials is high-quality.

Contact us to discuss your requirements of Painted aluminum coil for watchtowers. Our experienced sales team can help you identify the options that best suit your needs.

The excellent technical performance and high folding resistance

The raw materials used in the production process of this product are all high-quality materials, so there is no problem with the product quality. It can be applied well under different working pressures and different ambient temperatures and humidity and is not prone to bending deformation and shell expansion with a high application effect.

2. Methods of coating aluminum coil

Aluminum coil coatings are mainly anti-corrosion. Today, we will focus on methods of aluminum coil coatings.

Brush coating of aluminum coil

Brush coating is an early, simple, and traditional manual coating method, which is easy to operate and flexible, and can be applied to objects of any shape. In addition to dry and poor leveling coatings, it can also be applied to various coatings. The brushing method can make the paint penetrate, penetrate the pores of the metal surface, and enhance the adhesion between the coating film and the metal. The disadvantages are high labor intensity, low work efficiency, and poor coating appearance.

Scratch Coating of aluminum coil

Squeegee coating is a method that cannot be used for automobile coating with a scraper. It is used for the coating of liquid coatings with high user viscosity and high solid content. The common safety problems of the coating film in the blade coating operation are cracking, falling off, rolling, etc., and the thickness of the coating film is difficult to achieve uniformity.

Scratch Coating

Dip coating of aluminum coil

Painting is also a traditional Chinese painting technique. In this method, the object to be coated can be immersed in the tank liquid containing the paint, then taken out, and the excess paint can be dripped back into the tank liquid, or the excess paint can be thrown off by various mechanical design methods. This method has a high risk of solvent loss and is easy to develop and causes environmental air quality pollution. It is not suitable for volatile coatings, and the thickness of the coating film is not easy to uniform. Generally, it is mainly used for equipment or workpieces with complex social structures.

For example: In chemical plants, some equipment, such as combined heat exchangers, can be constructed by full dip coating because the inner pipe cannot be sprayed. Dip aluminized steel pipes are mainly used for petrochemical furnace pipes, various heat exchanger pipes, fractionation tower pipes, etc.

Spray coating of aluminum coil

Flow coating is a coating process in which the paint is sprayed from the nozzle to the surface of the object to be coated, and the paint flows from top to bottom to completely cover the surface of the object to be coated and form a coating film. The equipment used in this method is simple, it is relatively easy to realize mechanized production, the operation is simple and the production efficiency is high, but the coating film is not smooth or the coverage is incomplete. The thickness of the coating film is not easy to be uniform. Flow coating consumes more solvent than dip coating and can also cause pollution problems.

Spray Coating

Spray of aluminum coil

Spraying is to use the negative pressure generated by data compressed air at the nozzle of the spray gun to carry the paint into the container. The paint in the container is sprayed from the paint through the nozzle and immediately enters the high-speed compressed air flow in China so that the paint liquid develops and spreads rapidly one by one. The mist-like particles are shot towards the object to be coated and evenly coated on the surface. This method requires that the paint to be sprayed has a relatively low viscosity. Often added as a diluent in coatings. It is suitable for various architectural coatings and various objects to be coated in enterprises, and it is a relatively systematic and extensive coating technology process.

At CHAL aluminium coil manufacturing, our most frequent orders are from the construction and manufacturing industries. This is determined by the characteristics of the aluminum coil. We also provide aluminum foil, aluminum tubes, aluminum plates. If you are also looking for aluminum alloy products, please contact us via our homepage.

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