V. Continuous Pressing Process Core
1. Dynamic Steel Belt Conveyance
Two heat-resistant steel belts (1.5-2mm thick) move synchronously at 0.5-2.5m/min.
Thin boards (0.5-3mm): High-speed pressing (≥1.8m/min)
Thick boards (50-80mm): Low-speed deep penetration (≤0.8m/min)
2. Zoned Temperature Control
12-24 independent thermal zones (150-250℃ adjustable):
Infeed zone: Rapid heating (200-250℃) for adhesive activation
Middle zone: Constant curing (180-200℃)
Outfeed zone: Graded cooling (150-170℃) to suppress spring-back
3. Pressure Profile Matching
Thin boards: High-pressure short-cycle (≥5MPa peak, 10-30s duration)
Thick boards: Stepwise pressure ramping (0→2MPa preheat→4MPa core penetration→5MPa surface compaction)
Ⅵ. Servo-Hydraulic System Key Technologies
1. Multi-Cylinder Coordination
200-400 independent hydraulic cylinders (80-120mm bore), each equipped with:
High-frequency servo valve (response time ≤10ms)
Precision displacement sensor (0.001mm resolution)
Pressure transducer (±0.05bar error)
2. Real-Time Closed-Loop Control
Dual pressure-position feedback:
Thin boards: Position-priority control (±0.05mm tolerance)
Thick boards: Pressure-balance priority (inter-zone variation ＜0.3bar)
Dynamic cylinder stroke adjustment every 50ms to compensate for thermal/elastic deformation
3. Energy Efficiency Optimization
40% energy savings vs conventional pumps via variable-frequency servo pumps
Energy consumption for 80mm boards: ≤85kWh/m³
Ⅶ. 0-80mm Thickness Range Implementation
Thickness Range | Technical Challenge | Solution |
0.5-3mm | Surface crushing, density variation＞8% | Micron-level position control + surface temperature surge (230℃→5s) |
8-30mm | Incomplete core curing | Medium-temperature penetration (180℃≥90s) + pressure-holding compensation |
50-80mm | Insufficient heat penetration | Graded pressurization (0-30min:2MPa → 30-40min:4MPa) |
