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Wood and wood-based materials industry

Chipboard, fibreboard (MDF, HDF, OSB) production

Fibreboard production (MDF, HDF, OSB) is an energy-intensive manufacturing process.
In addition to steam for the cooking (defibration) and refining process, hot gas is required for drying and thermal oil for the continuous press. INTEC offers customised energy solutions that use a variety of type- and site-specific process fuels.

MDF process line

Gluing:  

  • During gluing, a precisely dosed quantity of adhesive is added to the chips, fibres or strands and evenly distributed.                                                

Checking the raw density profile using the basis weight scale

  • Immediately before the press infeed, the raw density profile in the mat is continuously measured using a weight per unit area scale.

Liquid application

  • Various liquids are often applied before the press infeed: the mat is sprayed with water or additives.

Formatting | Seasoning

  • The finished raw panels are cut into smaller commercial formats in a cutting system.

Calibrating

  • Calibrating the raw panels is a surface refinement process and is an important quality factor in panel material production. In a calibrating sanding machine, also known as a sanding line, the raw panels are simultaneously sanded from the top and bottom so that smooth surfaces are created and the panel has precisely the desired thickness.

Conditioning to storage temperature

  • The boards are still at a high temperature after pressing. Before further processing, they must therefore be cooled until a temperature is reached at which the boards can be stacked and stored - the storage temperature.

Pressing

  • To ensure high board quality, pre-pressing usually takes place before the actual pressing. The mat of chips, fibres or strands is pre-pressed before being transferred to the press

Spreading the chips, fibres or strands

  • In the production of fibreboards (MDF/HDF), the glued fibres are spread evenly on a continuously running conveyor belt. In the production of chipboard and OSB boards, the properties of the finished board are determined by the orientation of the chips and strands and by a multi-layer structure of particles of different sizes.

Drying

  • The chips (for chipboard) or strands (for OSB boards) are continuously fed into the dryer.
  • The drying process is usually convection drying in a drum dryer.Machining - producing the chips and strandsThe geometry of the chips (for particleboard) and strands (for OSB boards) plays a major role in the properties of the finished board. In order to achieve high quality, the chips and strands should have only slight variations in thickness, length, width and fines content.

Machining - producing the chips and strands

  • The geometry of the chips (for particleboard) and strands (for OSB boards) plays a major role in the properties of the finished board. In order to achieve high quality, the chips and strands should have only slight variations in thickness, length, width and fines content.