I. Cleaning Challenges Analysis

Automotive die castings (particularly aluminum alloy integrated die castings) face the following core cleaning challenges:

1. Complex Structure Cleaning: Burrs, chips, particles, and oils in internal cavities, through-holes, cross-holes, blind holes, threaded holes, and deep holes are inaccessible to traditional tools

2. Material Characteristics: Aluminum alloys are soft and prone to scratching and deformation; excessive grinding affects assembly precision

3. Release Agent Residue: Silicone-based release agents used in die casting are difficult to remove, and strong acid/alkali treatments can cause corrosion and environmental issues

4. High Cleanliness Requirements: New energy vehicle die castings demand high cleanliness, specific oil residue levels, and high-takt production

5. Consistency Issues: Random burr distribution makes it difficult for traditional automated equipment with fixed parameters to handle batch processing consistently

II. Mainstream Cleaning Technologies

1. Ultrasonic Cleaning

• Applications: Small-to-medium die castings with simple shapes requiring internal/external cleaning

• Advantages: Highly efficient and precise; removes oils, release agents, metal debris, and oxide layers

• Technical Points: Use low-foam cleaning agents; optimize frequency and power parameters

2. High-Pressure Spray Cleaning

• Applications: Large die castings with complex structures, automotive transmission housing oil passages

• Advantages: Ensures thorough cleaning through special nozzles and high-pressure guns; effectively removes internal burrs

• Technical Parameters: Pressure typically 0.3-0.8 MPa

3. Vacuum Cleaning Technology

• Applications: Porosity-rich, structurally complex die castings

• Advantages: Reduced liquid boiling point in vacuum environment enables efficient drying

4. Turbulent Surge Cleaning

• Features: Combines high pressure, ultrasonic, and fluid dynamics to enhance cleaning fluid penetration

5. Robotic Automated Cleaning

• Trend: Visual recognition and flexible control adapt to random burr distribution, improving batch consistency

Sinobakr Industrial Cleaning

• Industry Experience: 25 years of specialized expertise in automotive integrated die casting cleaning

• Core Technologies: Ultrasonic cleaning, high-pressure water cleaning, robotic automated cleaning

Cost & Efficiency Considerations

• Investment Optimization: Tesla, Xiaomi, etc., use CNC minimal-lubrication cleaning-free processes to save investment and energy consumption

• Batch Production: Automated equipment meets high-takt requirements; manual riveting processes ensure flexibility

VI. Quality Control Key Points

1. Cleanliness Standards: Particle contamination size and quantity measurement

2. Process Parameter Monitoring: Regularly check cleaning solution concentration, pH, and free acid concentration (titration every 4 hours)

3. Environmental Compliance: Wastewater COD below 300mg/L, no fluoride volatilization

4. Safety Protection: Acidic systems require acid/alkali-resistant gloves and goggles; neutralize waste liquid to pH 6-9 before discharge

Summary: Modern automotive die casting cleaning is evolving toward intelligence, eco-friendliness, and integration. It is recommended to select ultrasonic or high-pressure cleaning technology based on casting structural complexity, use new eco-friendly cleaning agents, and consider automated equipment to improve consistency and efficiency.