1,800 Tons/Month Capacity Automatic Hard Anodizing Production Line with 6500mm Max Profile Length for Type III Hard Anodizing

This automatic hard anodizing production line is engineered for manufacturers requiring consistent Type III anodizing of aluminum die castings and extruded profiles. The integrated system encompasses a complete process chain—from pre-treatment through anodizing to sealing—all managed within a PLC-controlled automated framework.

The system supports hard anodizing (MIL-PRF-8625 Type III) for applications demanding superior wear resistance and corrosion protection. It accommodates various aluminum alloys, including die-cast Al-Si-Cu grades and 6xxx/7xxx series extrusions, with adjustable process parameters based on workpiece geometry and alloy composition.

Key design features include closed-loop temperature control, automated chemical dosing, and rectifier output regulation, ensuring consistent batch-to-batch process repeatability. Production capacity is optimized according to specific workpiece mix, surface area per ton, and cycle time requirements.

The production line follows a sequential multi-stage process:

Loading → Degreasing → Rinsing → Alkaline Etching → Rinsing → Neutralizing → Rinsing → Hard Anodizing → Rinsing → (Coloring) → Sealing → Rinsing → Drying → Unloading

Each stage is controlled by the central PLC system with automated transfer between tanks. Rinse stages incorporate cascading counter-flow to minimize water consumption. The anodizing stage utilizes a rectifier with pulse capability, while electrolyte temperature is maintained within tight tolerances by an industrial chiller system.

A typical line layout includes the following major equipment:

• Overhead Crane System: 2–4 automated hoist units for rack transfer between tanks
• Process Tanks: Degreasing, etching, desmutting, anodizing, rinsing (multi-stage), coloring (optional), sealing
• Rectifier: High-power DC or pulse rectifier (current output matched to tank volume and workload)
• Chiller System: Industrial chiller with titanium or stainless steel heat exchanger for electrolyte temperature control
• Exhaust & Scrubber System: PP or FRP fume hoods with acid mist scrubber
• Chemical Dosing Station: Automated dosing pumps with pH/conductivity controllers
• PLC Control Cabinet: Central control with touchscreen HMI, recipe management, and data logging
• Drying System: Hot air dryer or centrifugal dryer

The line footprint and tank dimensions are customized based on maximum workpiece size and required throughput.

Every production scenario differs in workpiece geometry, alloy mix, and throughput target. We provide customized line layouts and process solutions based on your specific requirements—including tank sizing, crane configuration, rectifier capacity, and treatment cycle design.

To receive a tailored proposal, please share:

• Workpiece drawings or samples (material, dimensions, surface area)
• Target film thickness and performance requirements
• Required monthly throughput (tons or pieces)
• Available factory space and utilities (power, water, drainage)

Our engineering team will respond with a proposed line layout, equipment list, and estimated process cycle time.