Spraying

What's Spraying?

Spraying is an extremely common surface treatment process for parts. It mainly involves using a spray gun or a disc atomizer, utilizing pressure or centrifugal force to disperse the coating into uniform and fine droplets, which are then applied to the surface of the object being coated. The spraying surface treatment process is suitable for different materials such as metal and plastic.

Spraying is a general term for a surface treatment process. It further subdivides into various types.

Paint Spraying

Powder Coating

Thermal Spraying

Thermoplastic Spraying

Ultrasonic Spraying

Spray Coating Cases

Affected by the thickness of Spraying

Color Quality

The quality of the color is affected, with different thicknesses resulting in variations in surface color.

Abrasion Resistance

The thickness of the coating affects abrasion resistance and adhesion.

Structural Impact

In areas where components fit together, such as buttons, an overly thick coating can hinder assembly, while an overly thin coating can wear off easily.

Cost Efficiency

An overly thick coating increases the amount of paint used, thus raising costs. Additionally, a thicker coating can affect spraying time, indirectly increasing production costs.

Reference for Inspection Standards of Spray-coated Parts

Test Item	Inspection Standard
Appearance	Color must match the color card and be glossy (within sample limits). No scratches or fingerprints. No uneven color, dirt, particles, or uneven spraying. No rust. Cut edges must not have sharp burrs or edges.
Salt Spray Test	No bubbles or rust should occur. 5% saltwater at 35°C, continuous spray time as per customer requirements.
Coating Hardness	Pencil hardness should be above H, with no damage or scratches on the paint surface. Sharpen the pencil tip to a right angle and, applying a force of 1KG, draw an 8CM straight line on the paint surface at a 45-degree angle.
Cross-cut Test	No more than 5% paint should peel off the tested surface.
Paint Compliance	The paint used must be accompanied by a corresponding report and comply with ROHS regulations.

Spraying FAQs

What should I do if I'm not sure which type of surface treatment my product needs?

If you’re unsure about the type of surface treatment needed for your product, you can provide our sales representative with a picture of a similar surface treatment. We will be happy to assist you and provide the necessary guidance.

What types of materials can be spray-coated?

Spray-coating can be applied to a wide range of materials including metals, plastics, wood, glass, and ceramics. If you have a specific material in mind, please consult with our experts to determine the best type of coating for your application.

How long does the spray-coating process take?

The duration of the spray-coating process depends on several factors, including the type of coating, the complexity of the product, and the curing time. Typically, the process can take anywhere from a few hours to several days. We can provide a more accurate timeline based on your specific project.

What are the benefits of spray-coating over other surface treatments?

Spray-coating offers several advantages including a uniform and smooth finish, high efficiency, and the ability to apply coatings to complex shapes and hard-to-reach areas. It also provides excellent adhesion, durability, and resistance to corrosion and wear.

Can you match a specific color or finish for my product?

Yes, we can match a wide variety of colors and finishes. Please provide us with a color sample or a specific color code, and we will do our best to match it. Custom finishes such as matte, glossy, metallic, and textured are also available.

Is spray-coating environmentally friendly?

We offer eco-friendly spray-coating options that comply with environmental regulations. These coatings are low in volatile organic compounds (VOCs) and free from harmful substances. Please let us know if you require environmentally friendly solutions for your project.

What is the difference between powder coating and spray painting?

Powder coating involves applying a dry powder to the surface, which is then cured under heat to form a solid layer. It is highly durable and environmentally friendly. Spray painting involves applying liquid paint with a spray gun. Both methods have their advantages, and the choice depends on the specific requirements of your project.

Can you provide a sample of the spray-coating before starting the full project?

Yes, we can provide a sample of the spray-coating to ensure it meets your expectations before proceeding with the full project. This helps in finalizing the color, texture, and finish to your satisfaction. Please contact our sales team to arrange for a sample.

Can spray-coating be applied to large and small parts alike?

Yes, spray-coating is versatile and can be applied to both large and small parts. Our equipment and expertise allow us to handle a wide range of sizes and shapes, ensuring a high-quality finish regardless of the part’s dimensions.