Pre-cleaning spray equipment for mobile phone shell and middle frame
—— Precision pretreatment solutions for complex surfaces
Product positioning
The pre-cleaning equipment specially designed for mobile phone shells (glass/ceramic/plastic) and middle frames (aluminum alloy/stainless steel/magnesium alloy) integrates two core modules, high-pressure targeted spray flushing and intelligent air knife dehydration, and achieves a 99.5% surface impurity removal rate and 0.05mm crevice-free residue for CNC machining residual cutting fluid, stamping and drawing oil, dust burrs (≥5μm) and other pollutants. The equipment adopts through-type mesh belt transmission (speed 0.5-3m/min adjustable), suitable for small batch trial production and large-scale mass production, to meet the high-precision cleaning needs before electroplating, anodizing, and nano coating, and the surface tension of the workpiece after cleaning is ≥ 72mN/m, which effectively improves the yield of subsequent processes (such as a 40% reduction in the spraying defect rate).
Core technical advantages
1. High-pressure targeted spray flushing system
1. Full-surface cover cleaning technology
Multi-dimensional spray matrix
▶ 0.8-2.0MPa Adjustable Pressure:
Scalloped nozzle (30°/60° optional): covers a flat shell (e.g. glass cover) and a large arc middle frame (R-angle≥3mm), and works with a ±45° swing spray arm to achieve 360° flushing without dead angles
Needle-shaped fine nozzle (aperture 0.2mm): deep into the threaded hole of the middle frame (M1-M3), camera hole and other fine structures, pulse spray (80ms interval) to remove residual particles in the blind hole (removal rate>99%)
▶ Precise water quality control:
RO pure water (conductivity≤10μS/cm) three-stage filtration (5μm filter cartridge, activated carbon, softening resin) is used to prevent Ca²/Mg² ion residue from affecting the adhesion of the coating
Real-time monitoring by conductivity sensor with automatic switching of pure water/detergent ratio (adjustment accuracy ±2%)
Material protection design
✔ The spray line is coated with 316L stainless steel Teflon, which is resistant to hydrofluoric acid (glass etching solution) and neutral cleaning agent (pH 6-8)
✔ For aluminum alloy frames: spray pressure ≤ 1.5MPa, combined with corrosion inhibitor (concentration 0.3%), salt spray test time extended to 200 hours (ASTM B117 standard)
2. Intelligent workpiece recognition system
Visual scanning positioning:
▶ Industrial camera (12 million pixels resolution) automatically recognizes the workpiece type (e.g. iPhone middle frame / AirPods case) and matches the corresponding spray angle and pressure parameters (storage recipe≥ 200 sets)
▶ Weight sensor (accuracy ±0.1g) real-time load monitoring and automatic adjustment of transmission speed when overrun (adjustment accuracy ±5%)