Automatic Complete MDF (Medium Density Fiberboard) Production Making Machine with Continuous Flat Hot Press Machine
| Simple Introduction of MDF (Medium Density Fiberboard) |
Medium-density fiberboard (MDF) is a type of artificial board made by pressing wood fibers (or plant fibers) and synthetic (such as urea-formaldehyde resin) under high temperature and high pressure. Due to its moderate density (usually between 600 and 800 kg/m³), smooth surface and easy processing, it is widely used in furniture manufacturing, interior decoration, architectural decoration and other fields.
√ Core Features of MDF panel
| Density |
The internal structure is dense and has no wood grain directionality, making it suitable for fine processing |
| Surface smooth |
It can be directly veneered (such as PVC, wood veneer, melamine paper) or painted |
| Easy processing |
It has excellent sawing, drilling, engraving and milling performance |
| Good stability |
It is not prone to deformation or cracking and is superior to natural wood |
| Environmental protection property |
It is classified into E0, E1 and E2 grades (with different formaldehyde emission levels) |
√ Classified by density
| Panel type |
Density (kg/m3) |
Application |
| LDF (Low Density Fiberboard) |
300-600 |
Sound-absorbing boards, packaging materials |
| MDF (Medium Density Fiberboard) |
600-800 |
Furniture, door panels, decorations |
| HDF (High Density Fiberboard) |
800-1000 |
Floor base material, laminate door |
√ Application of MDF panel
- Furniture manufacturing: cabinet doors, drawers, bed frames, TV cabinets, etc.
- Interior decoration: wall panels, skirting boards, ceilings, background walls.
- Door industry: Molded doors, lacquered door core panels.
- Customized home furnishings: cabinets, wardrobes, bookshelves, etc.
- Others: Photo frames, toys, Musical Instruments (such as internal components of a piano)
| MDF Production Line /Production Step |
So what is the production step for making MDF panel? what important machines are required? let us see together.
<1> Raw Materials Preparation
√ Wood materials
- Main raw materials: Fast-growing forest wood (such as pine, eucalyptus, poplar) or wood processing residues (such as wood chips, sawdust, branches and twigs).
- The moisture content of the wood should be controlled between 40% and 60%, and it should be free of impurities such as metals and sand
√ Debarking and Wood chips
- Peeling: The bark is removed by a roller peeler (the bark contains impurities that affect the quality of gluing).
- Chipping: Use a chipper to cut the wood into small pieces of 20-30mm, which is convenient for subsequent fiber separation
<2> Fiber Preparation
√ Wood chip cleaning and screening
- Cleaning: The wood chips are washed with water or sorted by air flow to remove impurities such as sand and metal.
- Screening: Use vibrating screens to sort out wood chips that are too large or too small to ensure uniformity
√ Thermal grinding fiber separation (Defibration
- Preheating and cooking: The wood chips are sent into the cooking tank and the lignin is softened with saturated steam (160-180 ° C).
√ Hot mill (Refiner)
- Wood chips are ground into fibers by grinding discs under high temperature and high pressure.
- The fiber length is controlled within 0.5 to 3mm, which affects the strength of the board.
- Grinding disc clearance and pressure are key parameters (usually 0.1-0.3mm)
<3> Glue Applying and Drying
- Adhesive: Mainly urea-formaldehyde resin (UF) or phenolic resin (PF) (for moisture-proof MDF) is used
- Gluing method
Spray adhesive: Fibers are mixed with atomized adhesive in the pipe (commonly used).
Stirring and mixing: Fibers and glue are evenly mixed in a mixer.
- Glue content control: Usually 8%-12% (accounting for the weight of dry fibers)
√ Fiber drying
- Drying equipment: Drum dryers or air flow dryers are adopted.
- Temperature: Inlet 160-200ºC, outlet 60-80ºC.
- Target moisture content: The moisture content of the fibers after drying is 8%-12%.
<4> Mat Forming and Pre-pressing
√ Fiber paving
- Mechanical laying: Fibers are evenly distributed on the conveyor belt by the laying machine to form loose fiber felt.
- Air flow paving (more uniform) : Utilizing air flow to make the fibers settle evenly and reduce the density gradient.
- Slab thickness control: By adjusting the laying speed, the thickness before pre-pressing is usually 3 to 5 times that of the finished product
√ Pre-pressing
- Objective: To reduce the thickness of the slab, increase its density, and facilitate its entry into the hot press.
- Pressure: 1-3 MPa, compressed to 1.5-2 times the target thickness.
- Equipment: Continuous belt pre-press or intermittent plate pre-press
<5> Hot Pressing and Cooling
√ Hot pressing process
- Equipment: Multi-layer hot press (intermittent type) or continuous flat press (for large-scale production).
- Temperature: 180-220ºC (curing temperature of urea-formaldehyde resin).
- Pressure: 3-5 MPa, divided into high-pressure stage (compaction) and low-pressure stage (curing).
- Time: Adjust according to thickness, usually 0.3-0.6 minutes per mm (for example, it takes 5-11 minutes for 18mm plates)
√ Cooling
- Objective: To stabilize the internal stress of the sheet and prevent deformation.
- Method: Natural cooling or forced air cooling (cooling rack)
<6> Edge Cutting and Sanding
√ Trimming (Trimming)
- Equipment: Longitudinal and transverse edge sawing machine, for cutting irregular edges.
- Standard size: Commonly 1220×2440mm (4'×8')
√ Sanding
- Objective: To make the surface smooth and flat, facilitating veneering or painting.
- Equipment: Broadband sanding machine (coarse sanding + fine sanding).
- Sanding amount: 0.2-0.5mm on one side.
<7> Quality Control
Test and control the MDF panel quality, and packing
For Large-scale production capacity for MDF panel, OSB board or Chipboard, usually Continuous Press is popular and necessary and better.
So i want to special introduce this high technology Continuous flat hot press for you
Compare with Multi-opening Hot press, the Continuous flat press has the advantages of high efficiency, low energy consumption and stable plate quality.
The continuous flat press adopts a structure of steel belt and hot press plate. Through continuous feeding and dynamic pressure control, the fiber board blank is solidified and formed under high temperature and high pressure.
Continuous presses can be designed to satisfy different production capacity, such as per year 300,000cbm, 250,000cbm, 150,000cbm, 400,000cbm and others
It is a high technology equipment with complex production steps. in China, few suppliers can make it. We are one of these few suppliers who can manufacture for you.
| Who We Are? Why Choose Us? |
We are Shandong MINGHUNG OSB&MDF Machinery Equipment Manufacturing Co.,Ltd, one professional factory and manufacturer in China who focus on manufacturing the complete line of OSB making machine, MDF making machine and Particleboard making machine.
Our factory has a complete production and management system, from raw materials purchase to the final wooden panel, we can ensure each production step is strictly controlled and ensure it is correct. We have manufacturing these wood based panel machinery many years, with rich and mature production experience, many workers who have been working more than 15 years, professional technicians and designers, ensure we have the ability to offer you suitable and strong woodworking machinery for you.
We have the related Certificate for you import machines and do custom clearance. And related certificate and patent for inventions
| Related Wood Based Panel Machinery |
Dear friends, welcome contact us for more information of these OSB /MDF /HDF /Chipboard making machines.
We will contact you for more informations quickly
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