1. Raw Material Preparation Section

  Chipper (Optional Configuration): Used to cut logs or branches into wood chips that meet process specifications. This can be omitted if commercial wood chips are purchased directly.

  Chip Screen: Used to screen wood chips, separating oversized chips (returned for re-chipping) and fine particles, ensuring uniform chip size for the next process.

  Chip Bin/Silo: Used for the storage and buffering of wood chips, ensuring continuous and stable feeding to the fiber preparation section.

chipper

vibrating screen

2. Fiber Preparation Section (Core Section)

  Refiner: The core equipment of this section. Separates wood chips into high-quality wood fibers under high temperature and pressure.

  Resin Blending System:

      Resin Preparation System: For the storage, preparation, and supply of adhesives like Urea-Formaldehyde resin.

      Wax System: Provides and meters the waterproofing agent (wax).

      Resin Application Unit (Blowline Blender): Located in the discharge pipeline of the refiner, it precisely and uniformly sprays resin and wax onto the fibers.

 Fiber Dryer: Typically a pneumatic (flash) tube dryer, which uses high-temperature air flow to rapidly dry the moist fibers to a suitable moisture content during suspension transport.

refiner

glue mixer

dryer

3. Forming and Hot Pressing Section (Core Section)

  Forming Station (Former): Employs a mechanical forming station to evenly distribute the resinated and dried fibers into a continuous, loose mat.

  Pre-press: Initially compacts the fluffy mat to increase its strength and density, forming a coherent "mat blanket".

  Multi-Opening Hot Press: A key piece of equipment for the entire production line. It cures the pre-pressed mat under high temperature and pressure to form solid panels. This is a typical configuration for compact lines to control investment costs.

  Loading/Unloading System: Fully automatic equipment for feeding the mats into the multi-opening hot press and removing the pressed panels.

mat forming machine

pre press

hot press

4. Finishing Section

  Cooling and Turnover Device: Cools the hot pressed panels by forced air and turns them over to ensure uniform cooling and setting, preventing warpage.

  Panel Sizing Saws (Cross-Cut & Rip Saws): Automatically cuts the cooled continuous board ribbon into market-required dimensions.

  Sanding Line: Usually a 4-head wide-belt sander, which calibrates the panels to precise thickness and finishes the surface to ensure thickness tolerance and surface smoothness.

  Stacker: Automatically stacks the finished or sanded panels neatly.

  Packaging System: Performs automatic or semi-automatic packaging (e.g., wrapping, strapping) of the panel stacks.

dryer rack

cross-cut saw

sander

5. Central Control System

  PLC (Programmable Logic Controller) Control System: Provides automated control and interlocking for the core equipment of the entire line, ensuring stable, efficient, and safe production processes.

A compact Medium-Density Fiberboard production line with an annual output of 50,000 to 80,000 cubic meters is typically designed to be efficient, flexible, and relatively space-saving. Its core production process is similar to larger lines but on a more integrated scale.

1.  Raw Material Preparation:

      Wood processing residues (such as planer shavings, sawdust) or small-diameter wood are used as the primary raw materials.

      The raw materials are processed into uniformly sized wood chips using a chipper.

      The wood chips are screened; qualified chips are sent to storage silos, while non-conforming chips are re-crushed or removed.

2.  Fiber Preparation:

      Qualified wood chips are fed into a pre-heating and steaming bin for softening and pre-heating.

      Subsequently, the chips enter a defibrator (refiner). Under high temperature and pressure, the chips are separated into wood fibers.

      Simultaneously during refining, adhesive (usually urea-formaldehyde resin or melamine-modified urea-formaldehyde resin), waterproofing agent (paraffin wax), and other necessary additives are applied. This process is called "resin application" or "blending."

3.  Mat Forming and Pre-pressing:

      The resinated fibers are evenly formed into a continuous, consistent-thickness "fiber mat" on a conveyor belt using an air-forming or mechanical forming machine.

      The formed fiber mat then enters a pre-press for initial cold pressing to remove air, increase compactness, and form a mat with sufficient strength for handling and transport.

4.  Hot Pressing:

      The pre-pressed mat is fed into a multi-opening hot press or a continuous press. Under high temperature and high pressure, the adhesive in the mat cures rapidly, bonding the wood fibers firmly together to form a solid panel.

      For compact MDF, the hot pressing parameters (temperature, pressure, time) are precisely controlled to achieve the target density and physico-mechanical properties.

5.  Cooling and Trimming:

      The panels exiting the hot press are at a high temperature and need to enter a star cooler or similar cooling system to stabilize internal stresses and prevent deformation.

      The cooled continuous board is cross-cut and trimmed by saws to the required specification sizes according to orders.

6.  Sanding and Inspection:

      The trimmed rough panels are sent to a sander for surface finishing. Sanding ensures uniform panel thickness and a smooth, flat surface suitable for subsequent further processing or direct use.

      Finally, the finished panels undergo quality inspection. Qualified products are packaged, stacked, and stored in the warehouse.

The compact MDF production line, through optimized design, achieves efficient, continuous, and automated production from raw materials to finished products within a relatively small footprint. The process is interlinked, with the core focus being on fiber preparation, uniform resin application and mat forming, and precise hot pressing control to ensure the final product meets the predetermined quality and performance standards.

  Compact & Efficient Design: The production line features a scientifically compact layout, achieving high output within limited factory space and effectively saving civil construction costs.

 Excellent Cost-Effectiveness: Configured and optimized for medium output, it offers the best balance between investment cost, production efficiency, and product quality, ensuring a high return on investment.

  High Automation Level: Equipped with an advanced automatic control system for coordinated operation of key processes, significantly reducing manual intervention and ensuring stable and safe production.

  Strong Adaptability: Capable of utilizing various raw materials like small-diameter wood and branches, and can flexibly adjust product thickness.

 Stable & Reliable Quality: The produced MDF boards feature uniform density (typically around 0.75 g/cm³).