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Energy-saving OSB Continuous Press Machine That Saves 25% of Electricity

The energy-saving advantages of continuous flat-pressing hot presses are revolutionary. They achieve this by:completely eliminating heat loss caused by intermittent opening/closing (Core), enabling dynamic, zoned precise temperature control,drastically reducing drive/hydraulic energy consumption,achieving ultra-high production efficiency,perfectly integrating with high-efficiency heat recovery systems.
These factors combine to make continuous presses the indispensable core energy-saving equipment in modern panel production lines. Investing in a continuous press is not only an upgrade in capacity and quality but is also a key choice for achieving significant cost reduction, efficiency gains, and green, low-carbon production in the context of high energy prices.
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Energy-saving OSB Continuous Press Machine That Saves 25% of Electricity


Continuous flat hot press for PB MDF OSB production


Continuous flat-pressing hot presses (Continuous Press, CP) offer significant and multi-dimensional energy-saving advantages over traditional intermittent multi-daylight hot presses (Multi-Daylight Press, MDP) or single-opening presses. These advantages stem from their continuous production mode, structural design, and advanced control systems.


















Continuous Flat Press is a key equipment in woodworking machinery used in the production of man-made boards (such as particleboard, fiberboard, oriented strand board, etc.). It uses a continuous hot pressing process to press the slabs mixed with wood fibers or scraps and adhesives into high-strength, high-density boards.



Ⅰ.Working Principle

The core of the continuous flat hot press is to continuously press the slab through high temperature and high pressure. Its working process is as follows:

1.Feeding: The slab after paving and forming is sent to the entrance of the hot press through a conveyor belt.

2.Preheating and pre-pressing: Before the slab enters the main pressing area, the adhesive is softened by a preheating device and the air is expelled by pre-pressing.

3.Main pressing: The slab enters the pressing area composed of multiple layers of hot pressing plates, and is continuously pressed under high temperature (usually 180-250℃) and high pressure (2-5 MPa) to solidify the adhesive and tightly combine the fibers.

4.Cooling and board discharge: The pressed board is cooled and shaped in the cooling section, and then cut into standard sizes.


Ⅱ.Core Structure and Composition

Hot press plate system: Composed of multiple heating plates, the interior is heated by heat transfer oil or steam to provide uniform temperature.


Steel Belt for Continuous Belt Pressing Machine

heating plate for continuous press

Steel Belt for Continuous Belt Press

continous belt press


Steel belt system: Two circulating steel belts (upper and lower) hold the slabs and run continuously to ensure uniform pressure transmission.



MINGHUNG MDF PB Continuous Calendering Press Production Line

Two circulating steel belts

Continuous Belt Press Accessories

steel belts


Hydraulic system: Pressure is applied through hydraulic cylinders, and the pressing force in different areas can be adjusted in sections.



MINGHUNG Continuous Belt Pressing for Particleboard Production Line

hydraulic cylinders for PB/OSB/MDF production line

Cylinder for Continuous Belt Pressing for Particleboard Production Line

hydraulic system



Control system: PLC or computer control, real-time monitoring of parameters such as temperature, pressure and speed.



Siemens PLC for MDF PB OSB production line

siemens PCL 

MINGHUNG Continuous hot pressing production line For OSB Production

HMI


Auxiliary equipment: includes paving machines, pre-pressing machines, cooling sections, sawing systems, etc.


Chipboard Forming Machine Line

paving machine

Continuous Belt Hot Press Machine for PB MDF OSB Production Line

pre-pressing machine

Oriented Strand Board Hot Press Machine Line

cooling section




Energy Saving Advantages of Continuous Flat-Pressing Hot Presses vs. Traditional Hot Presses



1. Elimination of Idle Heat Loss (Core Advantage)


Problem with Traditional Presses

Continuous Flat-Press 

Solution/Advantage

Energy Saving Effect

(1)Intermittent production requires the press to repeatedly open and close (each cycle includes: loading → closing/pressurizing → holding/heating → depressurizing/opening → unloading).

(2)During opening, loading, and unloading, the high-temperature (200~230°C) press platens are directly exposed to air, losing significant heat through thermal radiation and convection.

(3)Massive steel platens and frames continuously dissipate heat during non-pressing periods, requiring extra energy to maintain temperature.

(1)Continuous operation: The mat continuously enters and moves at constant speed between closed press platens, which are always in the closed and pressurized state.

(2)No opening/closing action: Completely eliminates the time window where platens are exposed and lose heat.

(1)Heat loss reduced by 30%~50% or more (This is the most significant saving).

(2)Eliminates the need for frequent reheating to compensate for temperature drops during opening/closing cycles, drastically reducing the energy required to maintain temperature.



2. More Precise, Efficient Temperature Control & Heat Utilization


Problem with Traditional Presses

Continuous Flat-Press 

Solution/Advantage

Energy Saving Effect

(1)Temperature distribution across large, single platens can be uneven (especially at edges).

      (2)Heating systems have slow response times, making it difficult to precisely adjust temperature in real-time based on the mat's position.

      (3)Long heat transfer paths (from heating medium → platen → mat surface → mat core) result in lower efficiency.


(1)Zone temperature control: Platens are divided lengthwise into multiple independent heating/cooling zones (often dozens).

      (2)Dynamic temperature adjustment: Each zone can be independently set and precisely controlled, creating an optimized temperature profile:

    Infeed Zone: Lower temperature preheats the mat, driving off some moisture/VOCs, reducing steam explosion risk.

    Main Curing Zone: High temperature/pressure ensures rapid resin curing.

    Outfeed Zone: Gradual cooling sets the board shape, reducing internal stresses and lowering exit temperature.

    Direct contact heating: High-temperature steel belts/cauls directly contact the mat surfaces, enabling highly efficient heat conduction.


(1)Reduces over-heating: Heat is applied only where and when needed, avoiding energy waste.

     (2) Increases curing efficiency: Optimized temperature profile allows resins to cure fully in less effective time.

     (3) Lowers exit board temperature: Reduces subsequent cooling energy consumption



3. Lower Drive & Hydraulic System Energy Consumption


Problem with Traditional Presses

Continuous Flat-Press 

Solution/Advantage

Energy Saving Effect

(1)Each cycle requires driving massive press frames to perform high-frequency, long-stroke opening/closing movements (hydraulic cylinders).

      (2)Each closure requires instantaneous build-up of extremely high pressure (>100 bar), subjecting hydraulic systems to severe shock loads.

      (3)High-pressure oil pumps must be sized for peak power, operating inefficiently at partial load most of the time.


(1)Continuous, uniform motion: Main drive only needs to overcome friction from belts/mats moving between platens.

      (2)Gradual pressure build-up: Pressure is applied progressively and maintained constantly via cylinders/pads in zones, avoiding severe shocks.

      (3)VFD/Servo Control: Drive motors and pumps can use efficient VFD control, adjusting power based on actual load.


(1)Drive/hydraulic system electricity consumption reduced by 50%~70% (compared to intermittent presses of equivalent capacity).

      (2)Smoother equipment operation lowers maintenance costs.



4. Higher Production Efficiency & Lower Energy Consumption per Unit


Problem with Traditional Presses

Continuous Flat-Press 

Solution/Advantage

Energy Saving Effect

(1)Limited by opening/closing and loading/unloading times, effective pressing time is low (typically <50%).

      (2)Increasing layers (multi-daylight presses) to boost output results in larger, more energy-intensive equipment.


(1)24/7 continuous production: No loading/unloading pauses, equipment utilization can exceed 95%.

      (2)High line speed: Can reach over 1000 mm/s (depending on board thickness).

      (3)Massive single-line capacity: One continuous press line can exceed 500,000 m³/year, far surpassing multi-daylight presses.


(1)Significantly lower energy per tonne of board: Fixed heat losses and auxiliary equipment energy consumption per m³ of product are drastically reduced.

      (2)Economies of scale: High capacity dilutes unit product energy consumption.


5. Perfect Synergy with Heat Recovery Systems (Amplifies Savings)


Problem with Traditional Presses

Continuous Flat-Press 

Solution/Advantage

Energy Saving Effect

(1)Exhaust emissions are intermittent and pulsating, complicating heat recovery system design and reducing efficiency.

      (2)Condensate recovery systems must also adapt to cyclic operation.


(1)Generate a stable, continuous flow of high-temperature exhaust gas (relatively constant temperature and flow rate).

      (2)Generate a stable, continuous flow of high-temperature, high-pressure condensate.


(1)Enables heat recovery systems (exhaust heat exchange + flash steam recovery) to be designed and operated at maximum efficiency (as described earlier, recovering 60%~80% of waste heat).

      (2)Recovered thermal energy (hot air, flash steam) can be stably and efficiently supplied to the drying system, maximizing the displacement of primary energy.




Summary of Energy Saving 

  1.Overall Energy Reduction: Total energy consumption per unit product (per m³ of OSB/particleboard/MDF) (steam + electricity) reduced by 30%~50%.

  2.Steam Consumption Reduction:

      (1)Steam consumption of the press itself reduced: 30%~40% (mainly from eliminating idle loss and precise temp control).

      (2)With integrated heat recovery, total plant steam consumption reduced: 40%~60% (recovered heat used in drying).

  3.Electricity Consumption Reduction:

      (1)Press main drive/hydraulic system: Reduced by 50%~70%.

      (2)Auxiliary equipment (e.g., fans): Significant savings also due to superior VFD control.

  4.Capacity Increase: For comparable equipment size, continuous press output is typically 2~3 times higher or more than multi-daylight presses, offering a massive advantage in energy per unit.





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