High-Frequency Switching Power Supply Electroplating Oxidation Line with RO Wastewater Reuse

Equipment Description:

1. Process flow

Feeding → Pre-degreasing (40-60℃ alkaline solution) → Alkaline etching (50-60℃ NaOH) → Neutralization (nitric acid solution) → Anodizing (H₂SO₄ electrolyte) → Dyeing → Sealing → Drying (60-80℃ hot air) → Unloading.

2. Auxiliary system

1. Circulation filtration system

Magnetic pump + PP filter element (precision 5μm), plating solution recycling rate ≥ 95%, reduce impurity deposition.
2. Environmental protection treatment system

Acid mist purification: closed tank + alkali solution spray tower, acid mist purification efficiency ≥ 90%, in line with RoHS standards.

Wastewater reuse: RO reverse osmosis system, wastewater reuse rate ≥ 80%, COD value ≤ 50mg/L.
‌3. Power supply system‌
High-frequency switching power supply (output accuracy ±0.1A/dm²), hard oxidation requires pulse power supply (duty cycle 10%-30%) to reduce internal stress.

3. Control system‌
‌PLC+touch screen‌: preset multiple sets of process parameters (oxidation time 10-60 minutes, temperature -5~30℃), support fault alarm, slot switching operation and process data recording.
‌Intelligent monitoring‌: real-time collection of current density, temperature, pH value and other parameters, process fluctuation rate <1%.

4. Technical parameters‌

5. Equipment selection recommendations
Small parts/multiple varieties: Prioritize the gantry single hook production line, which supports fast model change (slot change time ≤ 15 minutes).
Large batch/high hardness: Use a dedicated hard anodizing line, equipped with an independent refrigeration unit (-5℃ low temperature control) and a pulse power supply.

Main structures and components:

‌I. Core structure and composition‌
‌1. Pretreatment unit‌
‌Degreasing tank‌: Use alkaline solution (NaOH concentration 40-60g/L) to remove grease on the aluminum surface through ultrasonic or air stirring to ensure the uniformity of the subsequent oxide film.
‌Alkali etching tank‌: Equipped with a constant temperature system (50-60℃), high-concentration NaOH solution (50-100g/L) dissolves the surface oxide layer and impurities of the aluminum material to control the surface roughness ≤Ra 0.8μm.
‌Neutralization tank‌: Nitric acid or sulfuric acid solution neutralizes the residual alkali solution to prevent secondary contamination of the oxidation tank.
‌2. Anodic oxidation unit‌
‌Oxidation tank‌: Sulfuric acid electrolyte (H₂SO₄ concentration 150-200g/L), titanium alloy cathode plate and aluminum anode form an electrolytic circuit, the current density is 100-200A/m², and supports the formation of an oxide film with a film thickness of 5-50μm.
Hard oxidation requires a low temperature environment (-5~10℃), equipped with titanium heating tubes and plate heat exchangers, and temperature fluctuations ≤±1℃.
‌Power supply system‌: high-frequency DC or pulse power supply (output accuracy ±0.1A/dm²), hard oxidation requires pulse mode (duty cycle 10%-30%) to reduce the internal stress of the film layer.
‌3. Post-processing unit‌
‌Dyeing tank‌: organic/inorganic dyes are used, and the circulating filtration system (5μm filter element) ensures dyeing uniformity (error ≤±5%).
‌Sealing tank‌: nickel salt sealing (temperature 95-100℃) or boiling water sealing process to improve the corrosion resistance of the oxide film (CASS test ≥48 hours).
‌4. Transmission and positioning system‌
‌Gantry crane‌: frequency conversion speed regulation motor drive, horizontal speed 4-40m/min, single hook load ≤500kg, support vertical lifting and swinging movements.
‌Positioning device‌: Photoelectric sensor cooperates with RFID identification system, and the positioning accuracy of the hanger is ≤±0.5mm to ensure the synchronization of the process.
‌5. Control system‌ ‌PLC control module‌: Preset multiple sets of process parameters (oxidation time 10-60 minutes, temperature -5~30℃), support fault alarm and process data recording.
‌Real-time monitoring‌: Collect parameters such as current density, temperature, pH value, and process fluctuation rate <1%.

‌II. Auxiliary system‌ ‌

1. Circulation filtration system‌ Magnetic pump + PP filter element (precision 5μm), plating solution recycling rate ≥95%, reduce impurity deposition.
‌2. Environmental protection treatment system‌ ‌Acid mist purification‌: Closed tank + alkali solution spray tower, acid mist purification efficiency ≥90%, in line with RoHS standards.
‌Wastewater reuse‌: RO reverse osmosis system achieves wastewater reuse rate ≥80%, COD value ≤50mg/L.

Features:

1.High cost performance: Based on the customer's product positioning and development strategy, and with economic affordability as the foundation, we achieve the best cost performance.
2.The advanced and meticulous design concept of the equipment, along with the highly automated industrial equipment, showcases the image of a modern and advanced enterprise.
3. It has high adaptability, meeting the current production requirements and reserving room for development, taking into account the needs of increased production and improved quality in the future.
4.Quality compliance strictly adheres to the ISO900 quality management system, with every minute detail of the entire equipment installation being strictly controlled.