MH-CHP
MINGHUNG
| 1. | Continuous Flat-Pressing |
| - Unlike intermittent multi-daylight presses that process limited batches, continuous presses operate with two circulating steel belts. - The mat enters between the upper and lower steel belts. - It moves continuously through a heating platen channel (up to tens of meters long) under uniform heat and pressure. - Cured panels exit continuously at the opposite end. |
| 2. | Segmented Pressure Control: |
- The essence of 12-stage presses: The heating channel is divided into 12 independent pressure zones along its length. - Each zone has dedicated hydraulic cylinders (or servo-driven mechanisms), pressure/position sensors, and independent control systems. - Core concept: Apply optimized pressure profiles tailored to the mat’s physicochemical changes at each stage (e.g., moisture vaporization, resin curing, stress relaxation). |
1. Feeding System: Precisely conveys formed mats into the press.
2. Steel Belt System:
- Two high-strength, heat-resistant, precision-ground steel belts.
- Drive/driven rolls for continuous motion.
- Tensioning rolls to maintain belt stability.
- Support rolls/plates to withstand pressing forces.
3. Hot-Pressing System (Core):
- Heating Platens: Positioned outside the belts; divided into temperature zones (thermal oil/steam heated).
- Pressure Frame: Robust structure to endure high forces.
- 12-Stage Hydraulic Cylinder Groups:
- Independent cylinder sets per zone (upper/lower).
- Independently control pressure and belt gap/panel thickness.
- Servo/proportional valves for precision.
- Sensors: High-accuracy pressure/position sensors per zone for closed-loop control.
4. Main Drive System: Adjustable-speed belt propulsion.
5. Discharge System: Cools and cuts panels to length.
6. Control System :
- Central PLC/DCS.
- 12 independent control loops (PID/advanced MPC algorithms).
- HMI for setting/monitoring pressure curves, temperatures, and gap values.
- Data logging for traceability/optimization.
- Automated pressure-curve calculation based on mat properties.
1. Optimized Density Profile:
- Entry zone: High pressure for rapid compression and thermal contact.
- Mid-zone: Adjusted pressure for core curing.
- Exit zone: Graded decompression (±3–4 stages) minimizes rebound and ensures thickness precision (±0.15 mm).
2. Enhanced Product Quality:
- Uniform density → Higher MOR/MOE, internal bond (IB) strength, surface hardness.
- Thinner pre-cured layers → Reduced sanding loss.
- Suppressed delamination/blistering.
3. Production Flexibility & Efficiency:
- Quick product changeovers via preset pressure profiles.
- Adaptability to raw material variations.
- Potential for higher line speeds.
4. Cost Reduction:
- 10–15% lower sanding loss → Material savings.
- Improved heat transfer → Energy efficiency.
- Higher yield from fewer defects.
The hot pressing stage is mainly divided into four functional zones (Pre-pressing, Main Curing, Setting, Decompression). 12 stages non-uniformly allocated, with decompression prioritized (final 2–4 stages).
Technical essence: Enables optimized density distribution (especially through-thickness) and thickness precision—core to high-quality panel production.
- MDF, particleboard, OSB, LVL production lines.
- High-performance/specialty boards (e.g., fire-retardant, moisture-resistant).
particleboard
OSB
MDF
The 12-stage continuous flat-press is the crowning achievement of modern panel technology. By enabling unprecedented control over pressure distribution—especially through precision decompression—it delivers superior product quality, thickness accuracy, and operational efficiency. Despite its complexity and cost, it remains indispensable for high-end, large-scale wood-based panel manufacturing.
> ✅ Transform Your Production Now!
> Request Your Customized Quote & Technical Proposal:
>Whatsapp: +8618769900191 +8615589105786 +8618954906501
Email: osbmdfmachinery@gmail.com
> Get a productivity upgrade plan within 24h
| 1. | Continuous Flat-Pressing |
| - Unlike intermittent multi-daylight presses that process limited batches, continuous presses operate with two circulating steel belts. - The mat enters between the upper and lower steel belts. - It moves continuously through a heating platen channel (up to tens of meters long) under uniform heat and pressure. - Cured panels exit continuously at the opposite end. |
| 2. | Segmented Pressure Control: |
- The essence of 12-stage presses: The heating channel is divided into 12 independent pressure zones along its length. - Each zone has dedicated hydraulic cylinders (or servo-driven mechanisms), pressure/position sensors, and independent control systems. - Core concept: Apply optimized pressure profiles tailored to the mat’s physicochemical changes at each stage (e.g., moisture vaporization, resin curing, stress relaxation). |
1. Feeding System: Precisely conveys formed mats into the press.
2. Steel Belt System:
- Two high-strength, heat-resistant, precision-ground steel belts.
- Drive/driven rolls for continuous motion.
- Tensioning rolls to maintain belt stability.
- Support rolls/plates to withstand pressing forces.
3. Hot-Pressing System (Core):
- Heating Platens: Positioned outside the belts; divided into temperature zones (thermal oil/steam heated).
- Pressure Frame: Robust structure to endure high forces.
- 12-Stage Hydraulic Cylinder Groups:
- Independent cylinder sets per zone (upper/lower).
- Independently control pressure and belt gap/panel thickness.
- Servo/proportional valves for precision.
- Sensors: High-accuracy pressure/position sensors per zone for closed-loop control.
4. Main Drive System: Adjustable-speed belt propulsion.
5. Discharge System: Cools and cuts panels to length.
6. Control System :
- Central PLC/DCS.
- 12 independent control loops (PID/advanced MPC algorithms).
- HMI for setting/monitoring pressure curves, temperatures, and gap values.
- Data logging for traceability/optimization.
- Automated pressure-curve calculation based on mat properties.
1. Optimized Density Profile:
- Entry zone: High pressure for rapid compression and thermal contact.
- Mid-zone: Adjusted pressure for core curing.
- Exit zone: Graded decompression (±3–4 stages) minimizes rebound and ensures thickness precision (±0.15 mm).
2. Enhanced Product Quality:
- Uniform density → Higher MOR/MOE, internal bond (IB) strength, surface hardness.
- Thinner pre-cured layers → Reduced sanding loss.
- Suppressed delamination/blistering.
3. Production Flexibility & Efficiency:
- Quick product changeovers via preset pressure profiles.
- Adaptability to raw material variations.
- Potential for higher line speeds.
4. Cost Reduction:
- 10–15% lower sanding loss → Material savings.
- Improved heat transfer → Energy efficiency.
- Higher yield from fewer defects.
The hot pressing stage is mainly divided into four functional zones (Pre-pressing, Main Curing, Setting, Decompression). 12 stages non-uniformly allocated, with decompression prioritized (final 2–4 stages).
Technical essence: Enables optimized density distribution (especially through-thickness) and thickness precision—core to high-quality panel production.
- MDF, particleboard, OSB, LVL production lines.
- High-performance/specialty boards (e.g., fire-retardant, moisture-resistant).
particleboard
OSB
MDF
The 12-stage continuous flat-press is the crowning achievement of modern panel technology. By enabling unprecedented control over pressure distribution—especially through precision decompression—it delivers superior product quality, thickness accuracy, and operational efficiency. Despite its complexity and cost, it remains indispensable for high-end, large-scale wood-based panel manufacturing.
> ✅ Transform Your Production Now!
> Request Your Customized Quote & Technical Proposal:
>Whatsapp: +8618769900191 +8615589105786 +8618954906501
Email: osbmdfmachinery@gmail.com
> Get a productivity upgrade plan within 24h
steel frame
