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 Core Technology Principles

1.  Heat Conduction & Curing

    Heat from the precision-heated platens (working temperature 170°C - 210°C) penetrates the mat, causing the PMDI or Phenolic resin to cross-link and achieve rapid curing .

2.  Multi-Stage Pressure Gradient Control

    Addressing the characteristics of long, fluffy OSB strands with high internal stress, the press is divided into multiple pressure zones along its length:

        Inlet High-Pressure Zone: Rapidly compresses the mat and expels air (Pressure: 8-12 MPa).

        Mid-Zone Holding Pressure: Maintains pressure to ensure adequate resin flow in the core (Pressure: 4-6 MPa).

        Outlet Low-Pressure Zone: Gradually releases internal stress to prevent blistering or warping (Pressure: 1-3 MPa) .

3.  Orientation Preservation

    Utilizes a high-precision, synchronously driven steel belt system. This ensures that the long surface strands and the cross-oriented core strands do not shift during entry and throughout the pressing process, perfectly preserving the "longitudinal-transverse-longitudinal" three-layer oriented structure .

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 Working Process

The production process of this continuous press is a highly automated, continuous assembly line operation, mainly consisting of the following core steps:

1.  Mat Feeding

    The oriented strand mat from the preceding process (forming station) is fed into the press infeed via an accelerating conveyor. During transport, the mat passes through metal detectors and thickness gauges to ensure it is free of impurities and has uniform thickness.

2.  Pre-compression and Deaeration

    Before entering the main pressing zone, the mat passes through a set of pre-press rollers or a pre-compression belt. This step applies low pressure (approx. 2-4 MPa) to perform initial compression on the fluffy mat, expelling a large amount of air from within the mat. This prevents blistering or delamination caused by rapid air expansion during subsequent hot pressing.

3.  Continuous Hot Pressing and Curing

    The mat enters the main heating zone clamped between the steel belt and roller table. According to the preset process recipe, the press is divided into multiple pressure and temperature zones along its length:

        High-Pressure Shaping Zone: Maximum pressure (8-12 MPa) is applied at the inlet to quickly compress the mat to the target thickness, while high temperature rapidly cures the adhesive in the surface strands.

        Holding Pressure Curing Zone: Pressure is appropriately reduced (4-6 MPa) to maintain constant mat thickness, allowing heat to transfer fully to the core layer and ensure complete curing of the core adhesive.

        Stress Relief Zone: Pressure gradually decreases (1-3 MPa) at the outlet to slowly release internal stress within the board, preventing warping and deformation after exit.

4.  Thickness Calibration and Board Exit

    At the press outlet, a precision thickness gauge continuously monitors the board thickness and provides feedback to the press control system for fine adjustment. The cured continuous board is conveyed out by the exit conveyor to subsequent cutting, cooling, and stacking processes.

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 Work Video

MINGHUN  Chipboard Continuous Press Production Line.mp4

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 Main Components

This continuous press consists of the following key components, working together to accomplish efficient and stable pressing tasks:

1.  Heavy-Duty Frame System

    Constructed with an integrally welded frame structure made from high-strength steel plates. The frame undergoes aging treatment and precision machining to ensure extremely high rigidity and dimensional stability under enormous working pressures (up to thousands of tons), serving as the fundamental guarantee for the machine's precision.

2.  Heating Platen System

    Forged from high-quality alloy steel with internal dual-spiral circulation oil channels to ensure uniform temperature distribution across the platen surface (temperature deviation ≤ ±1.5°C). The surface is precision-ground and hard chrome-plated, providing high surface finish and strong wear resistance, effectively extending service life and ensuring board surface quality.

3.  Hydraulic System

    Includes main hydraulic cylinders, accumulator stations, servo-proportional valves, and high-precision pumps. Utilizing closed-loop pressure control, it enables rapid response and precise pressure adjustment in each pressure zone according to board thickness and process requirements, with short response times and high control accuracy.

4.  Steel Belt with Drive and Tensioning System

    High-Strength Steel Belt: Made of special alloy steel resistant to high temperatures and fatigue, serving as the carrier for transferring pressure and heat.

    Drive Drums: Large-diameter drive drums covered with wear-resistant rubber provide powerful and smooth driving force.

    Hydraulic Tensioning Device: Automatically maintains constant tension on the steel belt and compensates for thermal expansion, preventing belt deviation and slipping.

5.  Roller Table and Thermal Barrier System

    High-Temperature Roller Tables: Arranged above and below inside the press, supporting the steel belt and transmitting pressure. They feature high-temperature bearings and self-lubricating designs to reduce frictional resistance.

    Thermal Barriers: Located at the press infeed and outfeed, effectively isolating the radiation of internal high temperatures to the frame and external environment, reducing energy consumption and ensuring operator safety.

6.  Lubrication System

    A centralized automatic lubrication system supplies high-temperature grease to moving parts such as roller table bearings and chains at timed intervals and in measured quantities, ensuring long-term stable operation and reducing maintenance workload.

7.  Electrical Control System

    Based on high-performance PLC and industrial computer, integrated with an HMI touch screen interface. The system features process parameter storage, historical data query, fault self-diagnosis, remote monitoring and maintenance capabilities, enabling fully automated unmanned operation.

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 Performance Advantages

High Production Efficiency: Continuous pressing eliminates auxiliary time, increasing output by over 50% compared to traditional multi-opening presses .

High Material Utilization: Precise thickness control and zoned pressure reduce strand usage and adhesive consumption (resin usage can be lowered to 9-10%), saving production costs .

Superior Board Quality: Achieves thickness tolerances within ±0.15mm, resulting in flat panels with high internal bond strength and low water absorption.

Intelligent Control: Integrated with MES system interfaces, supports remote diagnostics, and can store pressing recipes for various wood species, enabling one-click product changeover .

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 Applications

Construction & Structural: Roof sheathing, wall sheathing, floor underlayment.

Packaging & Transport: High-strength, heat-treatment-free export crates and pallets.

Furniture & Decoration: Cabinet frames, door core stock, base material for interior wall panels.

Certifications

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 Deliver goods

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 Frequently Asked Questions (FAQ)

Q1: What types of OSB is this continuous press mainly suitable for producing?

A1: This equipment is specifically designed for producing high-quality OSB, particularly suitable for high-strength structural OSB such as OSB/2, OSB/3, and OSB/4 grades. It can produce a wide thickness range (6-40mm) and easily handle oriented strand mats with extra-long strands (up to 150mm in length).

Q2: What are the equipment installation period and commissioning time?

A2: Typically, on-site installation takes approximately 2-3 months (depending on site preparation). After installation, our experienced team of engineers will conduct system commissioning and process optimization for about 4-6 weeks until qualified boards are produced, while providing comprehensive training to the operators.

Q3: How can I get technical support in case of a malfunction?

A3: We provide global technical support services. You can submit a service request via phone, email, or our online customer portal. For emergencies, we can dispatch engineers to the site. Furthermore, our control system supports remote diagnostic functions, allowing engineers to connect remotely to analyze fault causes and guide troubleshooting.

Q4: What is the energy consumption level of this press?

A4: We have incorporated several energy-saving technologies, such as optimized thermal oil circulation circuits to minimize heat loss, efficient insulation layer designs, and variable frequency drives for hydraulic pump stations. Compared to traditional equipment, energy consumption per unit of product can be reduced by approximately 15-20%. Specific consumption depends on the thickness and wood species of the boards being produced.

Q5: What is the service life of the steel belt and how is it maintained?

A5: Under normal operation and good maintenance, the service life of our high-strength alloy steel belt typically reaches 5-8 years. Daily maintenance mainly includes: regularly inspecting the belt surface for scratches or cracks; using automatic cleaning devices to remove surface residues; ensuring the tensioning system functions correctly to prevent deviation.