Electrophoretic coating is an advanced technology where the painted object, acting as an anode in anodic electrophoresis, is immersed in water-soluble paint. A cathode is placed opposite, and direct current is passed between the two poles. This current enables the paint to coat the object uniformly, thanks to the physical and chemical reactions driven by the electric field.
The typical electrophoretic coating process for a metal surface includes several meticulous steps: Pre-cleaning → On-line → Oil Removal → Washing → Rust Removal → Washing → Neutralization → Washing → Phosphating → Washing → Passivation → Electrophoretic Coating → Tank Cleaning → Ultra-filtration → Drying → Off-line. Each step ensures a pristine and high-quality finish.
Electrophoretic coating encompasses four interconnected and simultaneous processes.
1. Electrophoresis: Under the influence of a DC electric field, colloidal particles charged either positively or negatively move towards the opposite charge, a process also known as swimming.
2. Electrolysis: Redox reactions occur at the electrodes, resulting in oxidation and reduction phenomena at these respective points.
3. Electrodeposition: During electrophoresis, charged colloidal particles migrate towards the anode, releasing electrons and depositing in an insoluble state. This deposition forms a robust paint film on the surface of the template.
4. Electroosmosis: The electric field causes the liquid phase to move while the solid phase remains stationary. This action expels water from the paint film, forming a dense, low-water-content film with high resistance, making it difficult for current to pass through.
5. Iron Red Epoxy Electrophoresis Paint Example: This system utilizes modified epoxy resin, butanol, ethanol amine, talc, and iron red. Mixed with distilled water, the electrophoresis paint undergoes a series of complex physical, chemical, colloid, and electrochemical changes under a DC electric field, resulting in positively charged cations and negatively charged anions.
Electrophoretic coating boasts rapid application speed and can be fully mechanized and automated for continuous operation. This reduces labor demands and provides a uniform, strong adhesion paint film, even on areas that are difficult to coat, such as welding seams.
With a paint utilization rate of 90%-95%, electrophoretic paint is highly efficient. Using water as a solvent, it offers non-combustibility, non-toxicity, and ease of operation, making it a safe and practical choice.
The dried paint film after electrophoresis exhibits superior adhesion, rust resistance, corrosion resistance, and weather resistance, outperforming ordinary paints and traditional application methods.
Our paint spraying line is designed for automatic surface coating, adding preferred colors or decorations with precision. This system, developed by Shandong Bonita Machinery Co. Ltd, features fast spraying speed, uniform application, high efficiency, and low energy consumption. It significantly boosts output, and the up-and-down conveying system includes an automatic leveling device for materials of varying lengths, ensuring fully automated process control.
1. Fast speed, uniform spraying, high efficiency, low energy consumption, and high output, achieving 4-5 times the productivity of manual labor.
3. Our quick color change system, customizable to client requirements, minimizes gun washing time during color changes, enhancing equipment usage efficiency.
4. Centralized control system ensures easy operation and maintenance, streamlining the workflow.
5. The upper and lower conveying track system is designed to handle long and short materials efficiently. This includes an auxiliary lowering automatic leveling device, ensuring the lowering process is smooth and fully automated.
6. With years of expertise in the painting process, our painting line is meticulously designed for simplicity and efficiency, ensuring effortless operation and swift execution for workers.
7. The spray gun angle is fully adjustable to accommodate the varying sizes and shapes of products, enhancing precision and consistency.
Our powder spraying line excels in applying paint and plastic treatments to workpiece surfaces, seamlessly integrating with transportation systems such as suspension conveyors, electric rail trolleys, and ground conveyors for streamlined operations.
The core components of our powder spraying line include a powder spraying system, pretreatment equipment, painting equipment, oven, heat source system, electric control system, and suspension conveyor chain. The process flow encompasses: pre-treatment, powder coating, heating, and curing.
Advantages of Automatic Powder Spraying Equipment
1. Utilizing automatic powder spraying equipment not only reduces labor costs but more importantly, significantly enhances product quality and ensures quality stability, facilitating smooth and stable mass production, and effectively addressing enterprise productivity challenges.
2. During the spraying process, automatic spraying equipment emits no irritating odors, thereby preventing environmental pollution and safeguarding the physical and mental health of operators.
3. Automatic powder spraying equipment boasts a first-time powder utilization rate of 70%-80%, with coating thickness ranging from 60-150 microns. With recyclable powder, the overall coating utilization rate soars to 90%-98%, achieving a robust, thicker coating in a single application.
4. The powder coating applied by our automatic powder coating equipment is solvent-free, ensuring a safer and more environmentally friendly process.
5. Post-curing, the powder coating exhibits high plumpness and soft color. Its solvent-free formulation prevents pinholes and bubbles during curing and its solid state ensures no leakage or evaporation during transportation.
Q1. What are your packing terms?
A: Typically, we secure our products using robust, thicker bubble paper, and some items are additionally packed in cartons for enhanced protection.
Q2. What are your payment terms?
A: We require a 30% deposit via T/T to commence production, with the remaining 70% due before delivery. Prior to final payment, we will provide detailed photos of the products and packaging.
Q3. What are your delivery terms?
A: Our standard quotes are based on FOB Qingdao, but we can also accommodate terms such as EXW, FOB, CFR, CIF, and DDU.
Q4. What can you tell me about your delivery times?
A: Delivery times are project-dependent due to customization. For voltages different from 380V/3PH/50Hz, custom-made motors or electric components may extend delivery times.
Q5. Can you manufacture according to technical drawings?
A: Absolutely, we can produce items based on your technical drawings or specific requirements. Additionally, we offer drawing services to meet your needs.
Q6: How do you ensure long-term business relationships?
A1. We maintain superior quality and competitive pricing to benefit our customers.
A2. We treat every customer as a valued friend, conducting business with sincerity and fostering genuine relationships,
regardless of their origin.
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