Vetical Anodizing Production Line Engineered for Space Saving and High Capacity

1. Turnkey Intelligent Automation Solutions — Engineered for Precision, Efficiency, and Space-Saving Performance

Guangdong Mei-Al Technology Co., Ltd. is a leading anodizing equipment manufacturer specializing in the design, engineering, and commissioning of fully automated vertical anodizing production lines. Headquartered in Foshan — China's largest aluminum extrusion hub — we deliver complete turnkey solutions that integrate intelligent flexible automation control, high-power SCR rectification, and advanced environmental treatment systems. Our vertical hanging architecture is purpose-built to maximize floor space utilization, ensure superior solution drainage, and deliver consistent, uniform coating quality across every profile.

2. Why Choose a Vertical Anodizing Line?

Vertical anodizing represents the gold standard for high-capacity aluminum surface treatment operations. Our vertical configuration delivers measurable advantages that directly impact your bottom line:

• ①Maximized Space Efficiency

  By suspending profiles vertically, our lines dramatically reduce your production footprint. More tanks, more processes, and higher throughput — all within the same factory area. Ideal for both architectural and industrial aluminum finishing operations where real estate comes at a premium.

• ②Uniform Coating Thickness

  Gravity-assisted drainage ensures complete and consistent solution runoff from every profile surface. This eliminates pooling, streaking, and edge-thickness variations commonly seen in horizontal setups, resulting in a more uniform anodic oxide layer across the entire workpiece.

• ③Reduced Solution Drag-Out & Cross-Contamination

  Vertical hanging minimizes chemical carryover between process tanks. Less drag-out means lower chemical consumption, reduced wastewater treatment load, and tighter control over bath chemistry — protecting your process integrity while cutting operational costs.

• ④Intelligent Flexible Automation Control System

  Every MEL-Al vertical line comes equipped with our proprietary PLC-based Intelligent Flexible Automation Control System, featuring:

  • Automatic hoist collision avoidance — multi-crane scheduling with real-time position tracking
  • Precision process timing — digitally controlled immersion cycles for repeatable quality
  • Comprehensive data logging — production reports, parameter history, and traceability
  • Remote fault diagnosis — fast troubleshooting minimizes downtime
  • Automatic current & runtime calculation — optimized energy delivery per load

3. Core Equipment Highlights

• ①High-Power IGBT Rectifier — Precision Power for Consistent Anodizing

  At the heart of every vertical line is our ML-YH Series High-Power Silicon Controlled Rectifier (IGBT) Power Supply, engineered specifically for aluminum anodizing applications.

  • Current Range: 1KA to 25KA — scalable to match your production capacity
  • Output Voltage: 0–24V DC, continuously adjustable
  • Stability Accuracy: <1% voltage and current ripple — ensures uniform film formation
  • Dual-Mode Regulation: Both constant-voltage and constant-current operation
  • Comprehensive Protection: Over-temperature, under-voltage, phase-loss, and over-current safeguards
  • Air-Cooled Design: Engineered for sustained full-load operation without downtime
  • PC Interface Ready: Seamless integration with central control systems for full automation
• ②High-Frequency Switching Power Supply — Energy-Efficient Performance

  For operations prioritizing energy efficiency, our ML-GPY Series High-Frequency Switching Power Supply delivers:

  • High-frequency PWM technology for superior power conversion efficiency
  • Water-cooled configuration for thermal stability in demanding environments
  • Compact footprint with high power density
  • PLC-compatible control for automated process integration
• ③Automatic Overhead Crane System — Reliable, Precise Material Handling

  Our CDEY Series Special Profile Cranes are purpose-built for anodizing line duty :

  • Dual-beam lightweight structure optimized for profile handling
  • Span: Up to 15,000mm (H-type)
  • Travel Speed: 0–30m/min, variable frequency controlled
  • Lifting Speed: 10m/min for smooth, precise immersion
  • Dual-Crane Configuration: Large and small cranes for coordinated tank-to-tank transfer
  • Fully Automatic Mode: PLC-controlled positioning with millimeter accuracy
  • Low-power motors for energy-efficient operation (1.5kW travel / 3.7kW lifting)
• ④Auxiliary Systems — Engineered for Process Stability

  Chilling System with Plate Heat Exchangers

  Maintain precise bath temperatures with our integrated chilling solutions, featuring high-efficiency plate heat exchangers and a choice of air-cooled box chillers or flooded water-cooled screw chillers. Tight temperature control is essential for consistent anodic film quality and color uniformity.

  RO Pure Water System

  Ensure spot-free sealing and superior surface finish with our reverse osmosis (RO) pure water treatment system:

  • Multi-stage pre-filtration: quartz sand, activated carbon, and 5μm precision filters
  • RO membrane technology (Dow Filmtec / Toray) for high-purity process water
  • Mixed-bed ion exchange polishing for critical applications
  • Fully automatic operation with minimal maintenance

  Exhaust Gas Treatment — Acid Mist Scrubbers

  Our Three-Acid Acid Mist Treatment System protects your workforce and complies with environmental regulations:

  • Two-stage packed-tower spray absorption
  • Modified ball-type bubble contact technology for enhanced absorption efficiency
  • Sodium hydroxide + alkaline circulation chemistry
  • Gravity mist eliminator with high-stack discharge
  • UPVC construction for long-term corrosion resistance
• ⑤Electrophoresis Coating Line Option — Expand Your Finishing Capabilities

  Add an Electrophoresis Coating Line to your vertical anodizing system for premium corrosion protection and decorative finishes:

  • Electrophoresis Curing Furnace: Skeleton structure with thermal insulation, stainless steel interior, and imported burners with hot-air recirculation. Temperature uniformity within ±5°C for consistent cure quality.
  • Paint Recycling System: Ultrafiltration-based recovery with ≥98% permeate recovery rate, reducing paint consumption and wastewater load.
  • Varnish Rectification Device: Resin-based polishing system that removes impurity ions, stabilizes conductivity and pH, and ensures premium coating surface quality.
  • Aluminum Ion Stabilizer: Continuously removes aluminum ions from the anodizing bath while recovering ≥90% of the acid — stabilizing bath chemistry and reducing power consumption.

4. Standard Vertical Anodizing Process Flow

Our vertical lines support a fully configurable process sequence tailored to your product specifications. A typical architectural profile line includes:

1. Loading — Manual or automatic loading station with profile racking, ensuring uniform current distribution and scratch-free handling throughout the cycle
2. Degreasing — Alkaline cleaning to remove rolling oils, lubricants and surface contaminants, delivering a clean base for consistent subsequent treatment
3. Alkali Etching — Sodium hydroxide bath that dissolves the native oxide layer and smooths extrusion die lines, producing a uniform matte finish with precisely controlled etching depth
4. Desmutting — Acid pickling to remove residual black intermetallic smut after etching, leaving an activated, contaminant-free aluminum surface ready for oxide formation
5. Anodizing — Electrochemical formation of the protective porous oxide layer in sulfuric acid electrolyte, with film thickness regulated by current density and dwell time
6. Coloring (Optional) — Electrolytic coloring (single-salt, two-salt, tin-salt) for durable, lightfast finishes ranging from champagne and bronze to black and stainless tones
7. Sealing — Hot water or nickel-fluoride sealing that closes the porous oxide structure, improving corrosion resistance, weatherability and color retention
8. Unloading — Final rinse and unloading station for finished profile inspection and discharge preparation

Each stage is digitally timed and controlled through our central automation system, ensuring repeatable results batch after batch.

5. Environmental Compliance & Workplace Safety

At Guangdong MEL-Al Technology, we engineer environmental responsibility into every line we build. Our integrated environmental systems ensure your operation meets the strictest global emission and wastewater standards.

• ①Three-Acid Acid Mist Treatment

  Our two-stage scrubber system effectively captures and neutralizes sulfuric, nitric, and phosphoric acid mists, ensuring clean discharge and a safe working environment for your team.

• ②Comprehensive Wastewater Treatment

  We design and integrate complete wastewater treatment systems tailored to your effluent profile:

  • Nickel-containing wastewater — dedicated reduction, precipitation, and filtration
  • Acidic & alkaline wastewater — neutralization, coagulation, and sedimentation
  • Filter press dewatering — dry sludge for compliant disposal
  • Sludge concentration — reduced volume for lower disposal costs
• ③Operator Safety

  All equipment features comprehensive safety interlocks, emergency stop systems, and corrosion-resistant construction. Our automated material handling systems reduce manual lifting and chemical exposure, protecting your most valuable asset — your workforce.