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Enamel powder coating process
Electrostatic enamel powder coating lines
We supply complete systems for enamel powder coating
Enamel is a coating based on glass. The technique of enameling has been known for centuries.
Glass ground into enamel powder (frit) and a mixture of alumina, quartz sand and feldspar are slurried with water. The resulting aqueous solution (slurry) is applied to the components by dipping, spraying or pouring, dried and then fired at approx. 800 °C in an oven. Glass powder melts to form the enamel surface.
Enameled metal combines the advantages of glass (hardness, resistance to chemical influences, shine and a neat appearance) with the strength of metal.
The metal-enamel composite is manufactured using environmentally friendly production processes and natural raw materials. Only water is used as a solvent and cleaning agent.
Dirt cannot adhere to the glass-smooth enamel surface. They can simply be wiped away - without polishing. Enamel does not require any special care products.
Enameled products are particularly durable and have a particularly long service life. The surface can only be destroyed by rough force.
Advantages
- Very easy to clean
- Durable and robust
- hygienic
- abrasion-resistant
We supply complete systems for enamel powder coating
- No pre-treatment necessary for oily workpieces
- Up to 5m/minute speed
- Special plastic booth
- Special spray guns
- Turnkey delivery - Ask us for references!
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Automated Enamel powder coating
An enamel powder coating line is an industrial setup used to apply dry powder coatings to metal surfaces.
Here’s how it works:
1. Application: Enamel powder coatings are electrostatically applied to metal parts using a powder feed system and a charged spray gun. The powder adheres to the surface.
2. Curing Process: The coated parts are then heated in a high temperature curing oven. During this process, a chemical cross-linking reaction occurs, resulting in a hard, durable finish.
3. Components:
* Spray Booth: A sealed enclosure where the powder coating is applied.
* Powder Coating Gun: Electrostatically charges and sprays the powder onto the metal.
* Curing Oven: Heated chamber for curing the powder coating.
* Other components may include a pretreatment system, conveyor, and powder recovery system.
4. Advantages:
* Durability: Enamel powder coatings withstand extreme temperatures, UV radiation, and chemicals.
* Environmentally Friendly: No solvents used.
* Better Quality: Provides a durable, high-quality finish.
Enamel powder coating lines are commonly used in automotive, aerospace, appliance, and construction industries
The electrostatic dry powder coating method indeed offers several advantages, making it a popular choice for surface finishing. Let's delve into the details:
1. High Adhesion Rate:
- Electrostatic dry powder coating relies on the principle that parts with opposite electrical charges attract each other.
- Powder particles are evenly sprayed onto the object's surface using an electrostatic gun.
- The charged particles adhere to the surface, forming a dense and uniform porcelain layer.
- This high adhesion improves the coating's durability, corrosion resistance, and overall quality.
2. High Utilization Rate:
- Traditional enameling methods often result in wasted paint due to overspray.
- Electrostatic dry powder coating minimizes waste by directly applying the enamel powder to the object.
- The efficient utilization of enamel powder reduces environmental impact and resource consumption.
3. Improved Appearance and Quality:
- The even distribution of powder particles creates a smooth and uniform coating.
- Bubbles and sags are minimized, resulting in an aesthetically pleasing finish.
- The luster and acid resistance of the porcelain layer are enhanced.
4. Environmental Benefits:
- The powder used in this process can be recycled, reducing paint waste.
- Electrostatic dry powder coating aligns with environmental protection requirements.
5. Application and Considerations:
- Electrostatic dry powder coating is commonly used for metal objects, such as household appliances, office furniture and automobile accessories.
- Enamel manufacturers transitioning to this method need specialized equipment (e.g., electrostatic spray guns, powder supply systems) and trained staff.