Electrophoretic coating is a cutting-edge technology where the painted object, treated as an anode in anodic electrophoresis, is immersed in a water-soluble paint. A corresponding cathode is set up, and by passing a direct current between the two poles, the paint is evenly coated on the object through the combined physical and chemical actions of the current.
The detailed process flow for electrophoretic coating on general metal surfaces is as follows: Pre-cleaning → On-line → Oil removal → Washing → Rust removal → Washing → Neutralization → Washing → Phosphating → Washing → Passivation → Electrophoretic coating → Cleaning on the tank → Ultra-filtration → Drying → Off-line.
Electrophoretic coating typically includes four concurrent processes.
1. Electrophoresis: Under the influence of a DC electric field, charged colloidal particles move towards the opposite charge; this movement is also referred to as 'swimming.'
2. Electrolysis: Redox reactions take place at the electrodes, leading to oxidation and reduction phenomena.
3. Electrodeposition: Due to electrophoresis, charged colloidal particles move near the anode on the template surface, releasing electrons. This results in insoluble deposition and precipitation, forming a paint film.
4. Electroosmosis: In an electric field, the liquid phase moves while the solid phase remains stationary. Electroosmosis expels water from the paint film, eventually forming a dense paint film with very low water content and high resistance, even to current flow.
For instance, iron red epoxy electrophoresis paint consists of a modified epoxy resin system with butanol, ethanolamine, talc, and iron red substances. Mixed with distilled water, the paint separates into positively charged cations and negatively charged anions under a DC electric field. This initiates a series of complex physical, chemical, colloid chemical, and electrochemical transformations.
Electrophoretic coating offers rapid construction speeds and enables mechanized and automatic continuous operation, significantly reducing labor intensity. The resulting paint film is uniform with strong adhesion, and can even coat challenging areas like the weld seams of fascia plates smoothly and evenly, which are typically difficult to coat with conventional methods.
The paint utilization rate in electrophoretic coating is impressively high at 90%-95%. Additionally, using water as a solvent confers non-combustibility, non-toxicity, and ease of operation.
The dried paint film post-electrophoresis boasts excellent adhesion, with superior rust resistance, corrosion resistance, and weather resistance compared to ordinary paints and conventional application methods.
Our paint spraying line is designed to automate the application of paint to product surfaces, allowing for custom colors or decorations while minimizing labor. Developed by Shandong Bonita Machinery Co. Ltd, our system offers fast spraying speed, uniform application, high efficiency, and low energy consumption, thereby increasing output. The upper and lower conveying system includes an auxiliary automatic leveling device for different material lengths, ensuring fully automatic process control.
1. High speed, uniform spraying, high efficiency, low energy consumption, and high output, achieving 4-5 times the productivity of manual labor.
3. A quick color change system can be tailored to customer requirements, significantly reducing gun washing time during color changes and improving equipment utilization.
4. Centralized control is adopted for ease of operation and maintenance.
5. The upper and lower conveying track system is developed to accommodate variations in material lengths, with an auxiliary automatic leveling device ensuring easy and comfortable lowering. The entire process is fully automated for optimal efficiency.
6. With a wealth of experience in the painting process, our entire painting line is meticulously crafted to be intuitive and seamless. The operation procedures are straightforward, allowing for rapid and efficient performance by workers.
7. The spray gun angle can be automatically adjusted based on the size and shape of the product, ensuring precision and adaptability in every spray session.
Our powder spraying line is expertly designed for applying paint and plastic treatments to the surface of workpieces. It seamlessly integrates with various delivery mechanisms such as suspension conveyors, electric rail trolleys, and ground conveyors to form a cohesive transportation operation.
Key components of the powder spraying line include a powder spraying system, pretreatment equipment, painting equipment, oven, heat source system, electric control system, and a suspension conveyor chain. The process flow is categorized into: pretreatment, powder coating, and heating and curing.
Advantages of Automatic Powder Spraying Equipment.
1. Utilizing automatic powder spraying equipment not only drastically reduces labor costs but also significantly enhances product quality. This ensures consistent and stable production, enabling large-scale manufacturing and effectively addressing productivity challenges faced by enterprises.
2. During the spraying construction process, automatic spraying equipment does not emit irritating odors, thus preventing environmental pollution and safeguarding the physical and mental well-being of operators.
3. The first-time utilization rate of powder spraying with automatic equipment can reach an impressive 70%-80%. Coating thicknesses range from 60-150 microns, and the powder coatings are recyclable, pushing the utilization rate to an outstanding 90%-98%. A single coating application achieves a remarkably thick layer.
4. The powder coatings used in our automatic powder coating equipment are solvent-free,
5. After curing, the powder coating boasts high plumpness and soft, vibrant colors. The absence of solvents in the powder coating prevents the formation of pinholes and bubbles during the curing process. As a solid coating, it is resistant to leaks and evaporation during transportation.
Q1. What are your terms of packing?
A: Generally, we ensure the utmost safety by packing our goods with thicker bubble paper. Some items are additionally secured with cartons to guarantee protection.
Q2. What are your terms of payment?
A: We accept payment via T/T, with 30% as a deposit for production and the remaining 70% balance required before delivery. Prior to the final payment, we will provide you with photographs of the products and their packaging.
Q3. What are your terms of delivery?
A: Typically, our quoted prices are based on FOB Qingdao. However, we also accept various delivery terms including EXW, FOB, CFR, CIF, and DDU.
Q4. How about your delivery time?
A: Delivery time varies based on the specific project requirements, particularly for customized orders. If your voltage specification differs from 380V/3PH/50Hz, the delivery time may extend due to the need for custom-made motors or electric components.
Q5. Can you produce according to the technical drawings?
A: Absolutely, we can manufacture products based on your technical drawings or specific requirements. Additionally, we can create custom drawings for you.
Q6: How do you establish and maintain long-term, positive business relationships?
A1. We ensure long-term partnerships by maintaining high-quality standards and offering competitive pricing to maximize customer benefits.
A2. We treat each customer with the utmost respect, considering them as friends. We are dedicated to conducting business sincerely and fostering friendships, irrespective of their origin.
no matter where they come from.
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