MH-OSB
MINGHUNG
Function: To continuously feed pre-pressed OSB mats into the press under set temperature, pressure, and time (determined by speed) conditions. Through heating and pressing, it causes the thermosetting resin (typically MDI or PF) within the wood strands (or flakes) in the mat to cure, ultimately forming finished OSB boards with the required density, thickness, mechanical properties, and surface quality.
Objectives:
Continuous Production: Breaks the capacity bottleneck of batch-type multi-opening presses, enabling 24/7 uninterrupted production and significantly increasing output.
Uniformity: Ensures minimal thickness tolerance, uniform density distribution, and consistent physical and mechanical properties.
High Efficiency: Operates at high line speeds, achieving massive single-line capacity (up to 2000 m³/day or higher).
Automation: Highly integrated into the production line, achieving full automated control and reducing manual intervention.
High Quality: Precise control of process parameters produces high-performance OSB.
Energy Efficiency & Environmental Friendliness: Typically lower unit product energy consumption compared to multi-opening presses (especially higher thermal energy utilization).
1. Feeding: Pre-pressed OSB mats are conveyed into the entrance of the continuous press by a feeding system.
2. Clamping & Conveying: Two seamless, high-strength, high-precision endless steel belts (one top, one bottom) clamp the mat at the entrance.
3. Heating & Pressing:
Heating: A heating system (usually a thermal oil circulation system) is arranged inside (or outside) the steel belts, efficiently and uniformly transferring heat to the belts. The belts then transfer heat to the upper and lower surfaces of the mat in direct contact. Heat gradually conducts inward through the mat.
Pressing: Outside the steel belts (typically above, sometimes below), multiple groups (dozens or even hundreds) of zone-controlled hydraulic cylinders (or press frames) are arranged along the press length. These cylinders apply uniform pressure to the steel belts via press plates (or rollers), and the belts transfer this pressure to the mat. Pressure magnitude is precisely controlled per zone according to the needs of the mat at different positions (curing stages) within the press.
4. Curing & Forming: Clamped by the steel belts, the mat moves through the press length at a constant speed. During this passage, the mat undergoes stages: heating, resin melting/flow, high-pressure compaction, resin curing (cross-linking reaction), setting, and cooling (some presses have a cooling section at the end). Pressing time is determined by press length and belt speed.
5. Thickness Control: A core technology of continuous presses. Zone hydraulic systems (each zone has independent pressure sensors and control valves) and precise position sensors (measuring belt spacing/board thickness) enable real-time monitoring and dynamic adjustment of pressure per zone (sometimes even position) to compensate for mat thickness variations, moisture fluctuations, etc., ensuring minimal finished board thickness tolerance (typically ±0.15mm or better). A thickness gauge at the entrance usually provides the initial thickness setting reference.
6. Board Discharge: The cured and initially set OSB board is released by the steel belts at the press exit and conveyed out by discharge equipment to downstream processes (e.g., cutting, cooling, sanding).
1. Endless Steel Belts:
Material: Special high-strength alloy steel with high tensile strength, wear resistance, fatigue resistance, thermal conductivity, and dimensional stability.
Structure: Seamless welded or specially manufactured into an endless loop. Surface often treated (e.g., polished, coated) to reduce friction and sticking.
Function: Transfer heat, transfer pressure, form board surfaces, clamp and convey the mat. Key to continuous operation and board surface quality.
2. Belt Drive & Tensioning System:
Drive Roller: Usually at the exit end, driven by high-power motors to move the belts. Requires extremely high transmission accuracy and synchronization (top & bottom belts).
Tensioning System: Located at the entrance end (usually idler rollers), applies constant and adjustable tension to the belts via hydraulic or mechanical means. Maintains belt tautness and flatness, preventing slippage, misalignment, or wrinkling. Tension control is critical.
3. Heating System:
Heat Source: Typically high-temperature thermal oil boilers.
Circulation System: Oil pumps circulate hot oil (~240-260°C) through channels within heating plates (outside the belts) or heated rollers (supporting and heating the belts) distributed along the press frame. Heat transfers conductively to the belts, heating the mat. Requires precise temperature control.
4. Pressing System:
Main Frame: Robust steel structure bearing all pressing forces.
Zone Hydraulic Cylinders: Arranged in multiple groups (dozens to hundreds of zones) along the press length. Each zone has independent:
Cylinder: Generates pressure.
Pressure Sensor: Monitors zone pressure in real-time.
Position Sensor: (Optional, advanced) Monitors belt spacing/board thickness.
Servo/Proportional Valve: Precisely regulates oil pressure (sometimes combined with position control) per zone based on control system commands.
Press Plates/Press Beams/Press Rolls: Transfer cylinder pressure uniformly to the belts. Common forms:
Flat Platen Type: Large contact area, more uniform pressure distribution, suitable for high-quality requirements.
Roller Type: Multiple small-diameter rollers arranged; lower friction/resistance, lower drive energy consumption, relatively easier maintenance; also common in OSB production.
5. Thickness Control System:
Core: Closed-loop control based on the zone hydraulic system.
Inputs:
Pre-set target thickness profile (pressure typically high at entrance, highest in middle, lower at exit).
Real-time pressure feedback per zone.
(Optional) Real-time position/thickness feedback per zone (usually from laser distance sensors).
Entrance thickness gauge measurement.
Control Logic: The control system (high-performance PLC or DCS) compares set values with feedback, dynamically adjusting cylinder pressure (or target position) per zone to ensure board thickness remains stable at the set value, compensating for raw material variations. This is the core of achieving high thickness precision.
6. Belt Guiding & Lubrication System:
Guiding Devices: Ensure the belts run precisely centered, preventing misalignment ("running off").
Lubrication System: Sprays special high-temperature lubricating oil (often food-grade vegetable oil) between the belts and supporting components (rollers, sliding plates) to form an oil film. This drastically reduces friction, protects belts and supports, and lowers drive power. Oil spray volume, location, and recovery are key.
7. Entrance/Exit Devices:
Entrance: Precisely guides the mat into the press, ensuring smooth clamping by the belts. May include feed rolls, scrapers, etc.
Exit: Receives and conveys pressed boards. May include stripping devices (to prevent sticking), transfer tables, etc.
8. Automated Control System:
Core: High-performance PLC system.
Functions:
Coordinated control of all drives (belts, oil pumps, fans, etc.).
Precise control of temperature (per heating zone), pressure (per hydraulic zone), belt speed (determines pressing time), belt tension.
Implementation of complex thickness control algorithms.
Monitoring equipment status (temp, pressure, speed, position, vibration, lubrication status, etc.), fault diagnosis, and alarms.
Data logging, storage, and analysis (process optimization, quality traceability).
Communication and coordinated control with other line equipment (mat former, pre-press, finishing line).
Temperature: Platen temperature typically ranges from 200-240°C (depends on resin type and board thickness).
Pressure: Maximum pressure can reach 3-5 MPa (30-50 bar) or higher, depending on board thickness, density requirements, and equipment design. The pressure distribution profile along the press length is a core process curve.
Time: Determined by belt speed (m/min) and effective press length (m). Typical pressing time is 3-8 minutes (depends on board thickness and resin cure characteristics). Speed = Press Length / Pressing Time.
Belt Tension: Precisely set and maintained, typically around 30%-50% of the belt material's yield strength.
1. Continuous Production: Ultra-high capacity, suitable for large-scale industrial production.
2. Excellent Product Quality:
Minimal Thickness Tolerance: Zone control technology ensures far superior thickness uniformity compared to multi-opening presses.
Uniform Density Distribution: Continuous pressure application and precise control result in core density closer to surface density, yielding a more stable board structure and better mechanical properties.
Good Surface Quality: Steel belts produce smooth, flat surfaces.
High Consistency: Stable and controllable process parameters.
3. High Automation: Reduces reliance on labor, improves production stability and safety.
4. High Production Efficiency: No time lost to opening/closing cycles, operates at high line speeds.
5. Relatively Low Energy Consumption: High thermal energy utilization (continuous in/outfeed reduces thermal inertia losses), typically lower unit energy consumption than multi-opening presses.
6. Flexibility: By adjusting speed, pressure profile, temperature, etc., it can produce OSB boards of various thicknesses (e.g., 6mm - 40mm+) and densities (standard boards, structural panels, flooring substrates, etc.) within a wide range.
The Fully Automated Steel Belt Continuous Press for OSB is the cornerstone of industrial-scale OSB production. It clamps the mat between two precision endless steel belts, conveying it continuously through a long zone of high temperature and pressure. Combined with advanced zone hydraulic control and thickness control technology, it achieves efficient, stable, and high-quality continuous production of OSB boards. Its core technologies lie in the steel belt system, zone pressing and thickness control, and highly integrated automation. It represents the direction of OSB production technology development, significantly enhancing production efficiency, product quality, and economic benefits.
Claim Your Free OSB Line Layout! Get end-to-end plant design from strand preparation to sanding. Receive 3D factory plan within 30 days.
Whatsapp: +8618769900191 +8615589105786 +8618954906501
Email: osbmdfmachinery@gmail.com
Function: To continuously feed pre-pressed OSB mats into the press under set temperature, pressure, and time (determined by speed) conditions. Through heating and pressing, it causes the thermosetting resin (typically MDI or PF) within the wood strands (or flakes) in the mat to cure, ultimately forming finished OSB boards with the required density, thickness, mechanical properties, and surface quality.
Objectives:
Continuous Production: Breaks the capacity bottleneck of batch-type multi-opening presses, enabling 24/7 uninterrupted production and significantly increasing output.
Uniformity: Ensures minimal thickness tolerance, uniform density distribution, and consistent physical and mechanical properties.
High Efficiency: Operates at high line speeds, achieving massive single-line capacity (up to 2000 m³/day or higher).
Automation: Highly integrated into the production line, achieving full automated control and reducing manual intervention.
High Quality: Precise control of process parameters produces high-performance OSB.
Energy Efficiency & Environmental Friendliness: Typically lower unit product energy consumption compared to multi-opening presses (especially higher thermal energy utilization).
1. Feeding: Pre-pressed OSB mats are conveyed into the entrance of the continuous press by a feeding system.
2. Clamping & Conveying: Two seamless, high-strength, high-precision endless steel belts (one top, one bottom) clamp the mat at the entrance.
3. Heating & Pressing:
Heating: A heating system (usually a thermal oil circulation system) is arranged inside (or outside) the steel belts, efficiently and uniformly transferring heat to the belts. The belts then transfer heat to the upper and lower surfaces of the mat in direct contact. Heat gradually conducts inward through the mat.
Pressing: Outside the steel belts (typically above, sometimes below), multiple groups (dozens or even hundreds) of zone-controlled hydraulic cylinders (or press frames) are arranged along the press length. These cylinders apply uniform pressure to the steel belts via press plates (or rollers), and the belts transfer this pressure to the mat. Pressure magnitude is precisely controlled per zone according to the needs of the mat at different positions (curing stages) within the press.
4. Curing & Forming: Clamped by the steel belts, the mat moves through the press length at a constant speed. During this passage, the mat undergoes stages: heating, resin melting/flow, high-pressure compaction, resin curing (cross-linking reaction), setting, and cooling (some presses have a cooling section at the end). Pressing time is determined by press length and belt speed.
5. Thickness Control: A core technology of continuous presses. Zone hydraulic systems (each zone has independent pressure sensors and control valves) and precise position sensors (measuring belt spacing/board thickness) enable real-time monitoring and dynamic adjustment of pressure per zone (sometimes even position) to compensate for mat thickness variations, moisture fluctuations, etc., ensuring minimal finished board thickness tolerance (typically ±0.15mm or better). A thickness gauge at the entrance usually provides the initial thickness setting reference.
6. Board Discharge: The cured and initially set OSB board is released by the steel belts at the press exit and conveyed out by discharge equipment to downstream processes (e.g., cutting, cooling, sanding).
1. Endless Steel Belts:
Material: Special high-strength alloy steel with high tensile strength, wear resistance, fatigue resistance, thermal conductivity, and dimensional stability.
Structure: Seamless welded or specially manufactured into an endless loop. Surface often treated (e.g., polished, coated) to reduce friction and sticking.
Function: Transfer heat, transfer pressure, form board surfaces, clamp and convey the mat. Key to continuous operation and board surface quality.
2. Belt Drive & Tensioning System:
Drive Roller: Usually at the exit end, driven by high-power motors to move the belts. Requires extremely high transmission accuracy and synchronization (top & bottom belts).
Tensioning System: Located at the entrance end (usually idler rollers), applies constant and adjustable tension to the belts via hydraulic or mechanical means. Maintains belt tautness and flatness, preventing slippage, misalignment, or wrinkling. Tension control is critical.
3. Heating System:
Heat Source: Typically high-temperature thermal oil boilers.
Circulation System: Oil pumps circulate hot oil (~240-260°C) through channels within heating plates (outside the belts) or heated rollers (supporting and heating the belts) distributed along the press frame. Heat transfers conductively to the belts, heating the mat. Requires precise temperature control.
4. Pressing System:
Main Frame: Robust steel structure bearing all pressing forces.
Zone Hydraulic Cylinders: Arranged in multiple groups (dozens to hundreds of zones) along the press length. Each zone has independent:
Cylinder: Generates pressure.
Pressure Sensor: Monitors zone pressure in real-time.
Position Sensor: (Optional, advanced) Monitors belt spacing/board thickness.
Servo/Proportional Valve: Precisely regulates oil pressure (sometimes combined with position control) per zone based on control system commands.
Press Plates/Press Beams/Press Rolls: Transfer cylinder pressure uniformly to the belts. Common forms:
Flat Platen Type: Large contact area, more uniform pressure distribution, suitable for high-quality requirements.
Roller Type: Multiple small-diameter rollers arranged; lower friction/resistance, lower drive energy consumption, relatively easier maintenance; also common in OSB production.
5. Thickness Control System:
Core: Closed-loop control based on the zone hydraulic system.
Inputs:
Pre-set target thickness profile (pressure typically high at entrance, highest in middle, lower at exit).
Real-time pressure feedback per zone.
(Optional) Real-time position/thickness feedback per zone (usually from laser distance sensors).
Entrance thickness gauge measurement.
Control Logic: The control system (high-performance PLC or DCS) compares set values with feedback, dynamically adjusting cylinder pressure (or target position) per zone to ensure board thickness remains stable at the set value, compensating for raw material variations. This is the core of achieving high thickness precision.
6. Belt Guiding & Lubrication System:
Guiding Devices: Ensure the belts run precisely centered, preventing misalignment ("running off").
Lubrication System: Sprays special high-temperature lubricating oil (often food-grade vegetable oil) between the belts and supporting components (rollers, sliding plates) to form an oil film. This drastically reduces friction, protects belts and supports, and lowers drive power. Oil spray volume, location, and recovery are key.
7. Entrance/Exit Devices:
Entrance: Precisely guides the mat into the press, ensuring smooth clamping by the belts. May include feed rolls, scrapers, etc.
Exit: Receives and conveys pressed boards. May include stripping devices (to prevent sticking), transfer tables, etc.
8. Automated Control System:
Core: High-performance PLC system.
Functions:
Coordinated control of all drives (belts, oil pumps, fans, etc.).
Precise control of temperature (per heating zone), pressure (per hydraulic zone), belt speed (determines pressing time), belt tension.
Implementation of complex thickness control algorithms.
Monitoring equipment status (temp, pressure, speed, position, vibration, lubrication status, etc.), fault diagnosis, and alarms.
Data logging, storage, and analysis (process optimization, quality traceability).
Communication and coordinated control with other line equipment (mat former, pre-press, finishing line).
Temperature: Platen temperature typically ranges from 200-240°C (depends on resin type and board thickness).
Pressure: Maximum pressure can reach 3-5 MPa (30-50 bar) or higher, depending on board thickness, density requirements, and equipment design. The pressure distribution profile along the press length is a core process curve.
Time: Determined by belt speed (m/min) and effective press length (m). Typical pressing time is 3-8 minutes (depends on board thickness and resin cure characteristics). Speed = Press Length / Pressing Time.
Belt Tension: Precisely set and maintained, typically around 30%-50% of the belt material's yield strength.
1. Continuous Production: Ultra-high capacity, suitable for large-scale industrial production.
2. Excellent Product Quality:
Minimal Thickness Tolerance: Zone control technology ensures far superior thickness uniformity compared to multi-opening presses.
Uniform Density Distribution: Continuous pressure application and precise control result in core density closer to surface density, yielding a more stable board structure and better mechanical properties.
Good Surface Quality: Steel belts produce smooth, flat surfaces.
High Consistency: Stable and controllable process parameters.
3. High Automation: Reduces reliance on labor, improves production stability and safety.
4. High Production Efficiency: No time lost to opening/closing cycles, operates at high line speeds.
5. Relatively Low Energy Consumption: High thermal energy utilization (continuous in/outfeed reduces thermal inertia losses), typically lower unit energy consumption than multi-opening presses.
6. Flexibility: By adjusting speed, pressure profile, temperature, etc., it can produce OSB boards of various thicknesses (e.g., 6mm - 40mm+) and densities (standard boards, structural panels, flooring substrates, etc.) within a wide range.
The Fully Automated Steel Belt Continuous Press for OSB is the cornerstone of industrial-scale OSB production. It clamps the mat between two precision endless steel belts, conveying it continuously through a long zone of high temperature and pressure. Combined with advanced zone hydraulic control and thickness control technology, it achieves efficient, stable, and high-quality continuous production of OSB boards. Its core technologies lie in the steel belt system, zone pressing and thickness control, and highly integrated automation. It represents the direction of OSB production technology development, significantly enhancing production efficiency, product quality, and economic benefits.
Claim Your Free OSB Line Layout! Get end-to-end plant design from strand preparation to sanding. Receive 3D factory plan within 30 days.
Whatsapp: +8618769900191 +8615589105786 +8618954906501
Email: osbmdfmachinery@gmail.com
