600T/M Fully Automatic Anodizing Production Line for Kitchen & Bath Fittings
Price:
Customized Price
MOQ:
1set
Delivery Time:
60-90days
Brand:
MEL-AL
Product Description
600T/M Fully Automatic Anodizing Line for Kitchen & Bath Fittings
High-throughput anodizing system engineered for humid environments. Delivers electrolytic coloring in Brushed Silver, Gun Black, and Champagne with medium-temperature nickel salt sealing.
Overview
This fully automatic anodizing line is designed for manufacturers supplying kitchen and bathroom hardware into high-humidity environments. With a monthly capacity of 600 metric tons, it integrates pre-treatment, electrolytic coloring, and medium-temperature nickel salt sealing into a single automated workflow.
The system ensures consistent film thickness, uniform color distribution, and UV-fade resistance—critical for faucet handles, shower rails, towel racks, and cabinet pulls exposed to daily moisture and cleaning chemicals.
Technical Specifications
| Parameter | Specification |
|---|---|
| Monthly Capacity | 600 T/M |
| Operation Mode | Fully Automatic (Gantry Type) |
| Workpiece Type | Kitchen & bath fittings (faucets, handles, rails, brackets) |
| Base Material | Aluminum alloy 6061 / 6063 / die-cast ADC12 |
| Anodizing Type | Sulfuric acid anodizing (Type II, decorative) |
| Film Thickness | 8 – 15 μm (standard); up to 25 μm on request |
| Coloring Method | Electrolytic coloring (AC electrolysis) |
| Available Colors | Brushed Silver, Gun Black, Champagne |
| Sealing Method | Medium-temperature nickel salt sealing (60 – 70°C) |
| Sealing Quality | ≥ 300 mg/dm² weight loss per ISO 3210 |
| Corrosion Resistance | ≥ 500 hours CASS test (humid environment rated) |
| UV Fade Resistance | ≥ Grade 4 per ISO 105-A02 (electrolytic pigment locked in pores) |
| Water Rinse Stages | 3-stage cascading rinse + 1 DI rinse |
| Wastewater Treatment | Integrated neutralization + heavy metal precipitation |
| Control System | PLC + HMI touch panel; recipe storage for 99 products |
| Energy Consumption | ~180 – 220 kWh/ton (variable by load) |
Process Flow
- Loading — Jigs loaded onto overhead conveyor; barcode scan initiates recipe
- Degreasing — Alkaline soak at 55°C to remove machining oils and fingerprints
- Water Rinse — Overflow cascade rinse, conductivity monitored
- Pickling / Desmuting — Acid dip to remove oxide scale and smut
- Water Rinse — Second rinse to prevent cross-contamination
- Anodizing — Sulfuric acid electrolysis at 18 – 22°C; DC rectifier 15 – 18 A/dm²
- Water Rinse — Remove residual acid before coloring
- Electrolytic Coloring — AC current deposits metallic salts into porous oxide film; color locked at molecular level for UV stability
- Water Rinse — Stop coloring reaction precisely
- Nickel Salt Sealing — Medium-temperature bath (60 – 70°C) hydrates and seals pores; enhances corrosion resistance for humid environments
- Water Rinse — Remove sealing residue
- DI Water Rinse — Final deionized rinse to prevent water spots
- Hot Air Drying — 80°C circulated air; moisture eliminated before packing
- Unloading & Inspection — Film thickness, color consistency, and seal quality checked per AQL standard
Core Advantages
Built for Humidity
Medium-temperature nickel salt sealing achieves ≥500 hours CASS corrosion resistance. Ideal for bathroom and kitchen environments with constant moisture exposure.
UV-Stable Electrolytic Colors
Unlike organic dyes, electrolytic coloring deposits metallic pigments inside the oxide pores. Brushed Silver, Gun Black, and Champagne retain their appearance after prolonged UV exposure.
Fully Automatic Consistency
Gantry transfer system eliminates human error in dwell time and temperature. Batch-to-batch color deviation controlled within ΔE ≤ 1.0.
Recipe-Driven Flexibility
PLC stores 99 product recipes. Switching from Gun Black to Champagne takes <15 minutes—no manual parameter re-entry.
Integrated Wastewater Compliance
Built-in neutralization and nickel recovery module ensures discharge meets local environmental regulations without external treatment plant investment.
Supporting Equipment
| Equipment | Function |
|---|---|
| Overhead Gantry Transfer System | Automated jig movement between tanks; programmable dwell time ±2 sec accuracy |
| DC Rectifier (Anodizing) | 12V / 8000A thyristor-controlled; ripple <5% for uniform film growth |
| AC Coloring Rectifier | 18V / 3000A sinusoidal output; essential for even metallic pigment deposition |
| Medium-Temp Sealing Tank | 60 – 70°C nickel acetate/fluoride bath; PID temperature control ±1°C |
| Cascading Rinse Tanks | 3-stage counterflow; reduces water consumption by 40% vs. single-tank rinse |
| DI Water Generator | Reverse osmosis + mixed-bed ion exchange; conductivity <10 μS/cm |
| Hot Air Dryer | Circulating oven at 80°C; prevents water staining on decorative finishes |
| Wastewater Treatment Unit | Chemical precipitation + pH adjustment; handles Ni²⁺, F⁻, and Al³⁺ |
Frequently Asked Questions
Why is electrolytic coloring recommended over organic dyeing for kitchen and bath fittings?
Electrolytic coloring deposits metallic ions (Sn, Ni, Co) directly into the anodic pores. These pigments are locked within the aluminum oxide crystal structure, making them resistant to UV fading, heat, and household cleaners. Organic dyes sit on the surface and degrade faster in humid, high-UV environments.
What is the difference between medium-temperature nickel sealing and hot water sealing?
Hot water sealing (95 – 100°C) hydrates aluminum oxide into boehmite, closing pores. Medium-temperature nickel salt sealing (60 – 70°C) adds nickel ions that accelerate pore closure and improve corrosion resistance—critical for bathroom fittings exposed to chlorinated water and steam. It also reduces energy costs by ~35% compared to boiling water sealing.
Can this line handle small, irregular-shaped bathroom accessories like hinges and brackets?
Yes. The gantry system uses adjustable titanium jigs and custom racking fixtures. Parts as small as 50 mm can be secured without contact marks. We design fixtures during the DFM (Design for Manufacturing) phase based on your CAD files.
What is the lead time from deposit to commissioning?
Standard lead time is 90 – 120 days (design 15 days, fabrication 60 days, installation & commissioning 30 – 45 days). Shorter lead times available for standardized configurations.
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Get in Touch
Have questions about our products or want to discuss a custom order? Our team is ready to help you.
Company
Guangdong MEI-AL Technology Co., Ltd.
Location
No. 1, Changgang North Road, Changhongling Industrial Park, Shishan Town, Nanhai City, Foshan City
Contact Person
rainbow