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 Product Description

The Particle Board Double Belt Continuous Press is a revolutionary core production equipment in the modern wood-based panel industry, representing the pinnacle of high-efficiency and high-quality continuous production technology. It has fundamentally replaced traditional discontinuous multi-opening hot presses by transforming loose particle mats into solid, uniform finished boards through a continuous, controlled process. The "Double Belt" in its name refers to its core feature – two massive, continuously circulating steel belts that clamp and convey the mat through the entire hot-pressing and forming process.

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 Core working principle

The working principle of the Double Belt Continuous Press can be summarized as follows: a loose particle mat, sandwiched between two high-temperature steel belts, passes continuously through various functional zones of the press under precisely controlled temperature, pressure, and speed, ultimately achieving complete resin curing and stable board formation.

The specific process is as follows:

1.  Mat Feeding and Pre-pressing: The loose particle mat from the forming station is first fed into the press via an infeed device. Before entering the main press section, it typically passes through a pre-press for initial compression, removing air and providing initial strength to prevent disruption at the main press entrance.

2.  Clamping and Conveying by Dual Belts: The pre-pressed mat enters the "pressure chamber" formed by the upper and lower steel belts. The mat is tightly clamped between the two belts and conveyed forward by their synchronized movement. This ensures no relative sliding or surface damage occurs during pressing and heating.

3.  Zoned Heating and Pressing (Core Section): The core of the press is a long pressing unit divided into multiple pressure zones. Each zone features independent heating platens and hydraulic control systems.

      Infeed Zone: Pressure increases rapidly to quickly compress the mat close to the target thickness.

      Main Pressing and Curing Zone: Here, the mat is subjected to the highest pressure and temperature (typically 180-220°C, transferred via heating platens circulating with thermal oil or steam). Under this heat and pressure, the wood lignin softens, and adhesives on the particle surfaces undergo cross-linking, rapidly curing and permanently bonding the loose particles together.

      Pressure Release and Calibration Zone: Pressure is released in a precise, step-wise manner. This gradual release is crucial, allowing internal steam and residual stresses within the board to escape slowly, effectively preventing "blowing" or spring-back deformation caused by sudden pressure release, thereby ensuring precise thickness and dimensional stability.

4.  Cooling and Setting: A cooling section is often integrated at the press's discharge end. Here, the board is gradually cooled, setting its structure and further enhancing its strength.

5.  Continuous Discharge: The fully cured, cooled, and set particle board is continuously discharged from the press outlet and proceeds to the cutting station to be sawn to the required dimensions.

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 Key technical features & advantages

  Extremely High Production Efficiency: The continuous process eliminates the non-productive time associated with the opening, closing, loading, and unloading cycles of discontinuous presses, resulting in significantly higher output.

  Exceptional and Consistent Product Quality:

      Uniform Thickness: Precise thickness control systems allow for micron-level adjustments, ensuring minimal thickness variation across the entire board and between production batches.

      Uniform Density: The continuous flat-pressing process results in highly consistent internal density distribution, yielding superior mechanical properties.

      Excellent Surface Quality: The smooth surface of the steel belts is imparted directly onto the board, resulting in an exceptionally flat and smooth surface finish.

  Flexible Production Adaptability: Quick changes in production parameters via the control system allow for easy production of various thicknesses and specifications of particle board, Oriented Strand Board (OSB), etc.

  Significant Energy and Resource Savings: The continuous process offers higher thermal efficiency and lower energy consumption per unit product compared to discontinuous presses. Precise thickness control also reduces raw material waste.

  High Level of Automation & Intelligence: The entire process is automatically monitored by a central control system, featuring recipe management, fault diagnosis, and data logging. This drastically reduces manual intervention, lowers labor intensity, and facilitates smart manufacturing.

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 Key components

1.  Press Frame: A robust steel structure designed to withstand all operational loads.

2.  Dual Steel Belt System: The core component, comprising two heat-resistant, high-strength alloy steel belts. Equipped with tensioning, guiding, and cleaning systems to ensure smooth and precise operation.

3.  Heating Platen System: Located inside the steel belts, arranged in zones, and circulating high-temperature thermal media to provide uniform heat to the press.

4.  Hydraulic Pressing System: Consists of pumps, valve groups, and numerous zone-controlled hydraulic cylinders that provide precise, adjustable pressure to each press zone.

5.  Drive System: Motors and main drive rollers that power the continuous movement of the steel belts.

6.  Thickness Control System: Includes online thickness gauges, sensors, and servo mechanisms for real-time monitoring and dynamic adjustment of the platen gap to ensure thickness accuracy.

7.  Central Control System (PLC): The brain of the equipment, integrating automation control, Human-Machine Interface, and data processing functions.

8.  Infeed and Discharge Devices: Ensure smooth feeding of the mat and efficient discharge of the finished board.