MH-PB-PM
MINGHUNG
 | Working Principle |
The working principle of the high-precision OSB directional spreading and forming machine is based on mechanical orientation combined with gravity settling technology.
The core concept is to align long wood strands in a specified direction (usually the length or width direction of the panel) during the spreading process, thereby forming a mat with directional structure.
The detailed working process is as follows:
1. Dispersed Feeding
Dried and classified strands are evenly fed into the spreading system by a metering device, ensuring a loose, continuous, and stable material flow.
2. Directional Alignment
Strands drop onto high-speed rotating multi-stage orienting roller sets. The rollers have specially designed grooves or tooth profiles. Through shear and friction between the rollers, the strands rotate and align along the roller axis (the target orientation direction of the panel), finally falling in a roughly parallel orientation.
3. Airflow Assistance (Optional)
In some models, an airflow field is arranged below the orienting rollers. Negative or positive pressure airflows adjust the falling posture of strands, further improving the orientation rate and reducing overlapping or bridging.
4. Uniform Spreading & Mat Forming
Oriented strands fall freely onto a continuously running forming conveyor belt, creating a mat with a certain thickness and density. A leveling roller or thickness-adjusting plate is installed above the conveyor belt, working with a real-time weighing system to provide closed-loop control of spreading volume, ensuring uniform mat density across width.
5. Mat Output
The formed oriented mat is conveyed to the next process stage (e.g., pre-pressing, hot pressing) for subsequent compressing operations.
Throughout the process, by precisely controlling the falling trajectory and alignment of strands, the equipment enables the final OSB panel to achieve higher bending strength and dimensional stability in specific directions.
| Main Components |
Component Name | Function Description |
1. Metering Feeding System | Composed of a hopper, metering belt or screw feeder; delivers strands at a constant flow rate to the spreading head to ensure uniform and continuous feeding. |
2. Directional Spreading Head | Core component containing multiple sets of orienting rollers. Roller surfaces have grooves, teeth, or elastic structures to force strands to align in the specified direction. |
3. Orienting Roller Sets | Typically 3–6 pairs of counter-rotating rollers, speed independently adjustable. Strand posture is controlled by gap and tension between rollers. |
4. Airflow Assistance System (Optional) | Includes fan, air ducts, and air distribution devices; improves the falling posture of strands and reduces non-oriented arrangement. |
5. Forming Conveyor Belt | High-strength anti-slip belt supporting continuous mat movement. Speed is matched to production output, usually with VFD control. |
6. Thickness/Weight Control System | Consists of online weighing sensors, thickness detection roller, and adjustment mechanisms; provides real-time feedback control of the mat. |
7. Leveling & Shaping Device | Located above the conveyor belt; used to smooth the mat surface thickness and remove excess material. |
8. Electrical Control System | PLC + HMI touchscreen; enables recipe management, process monitoring, parameter adjustment, and fault alarms. |
9. Frame & Safety Guards | Integrated steel structure frame, equipped with safety doors and maintenance platforms for easy service and operation. |
| Technical Parameters |
Spreading Width: 1220–2800 mm
Spreading Speed: ≤30 m/min
Spreading Accuracy (weight deviation): ≤±1.5%
Orientation Rate: ≥90%
Installed Power: 45–110 kW
This equipment is widely used in new OSB, FOSB, and high-performance oriented structural board production lines as well as retrofit projects. It is a key machine for improving the mechanical performance and product uniformity of OSB panels.
| About Us |
We are China professional factory and supplier of OSB board making machine, MDF/HDF making machine and Flakeboard/Particleboard making machine. Whatever which size, thickness, capacity you want to make, and whatever what kinds of raw materials do you use, our professional team can offer a suitable and good solution for you.
Whatsapp: +8618769900191 +8615589105786 +8618954906501
Email: osbmdfmachinery@gmail.com
