MDF production line

Production process

1.Material preparation section

After the raw materials are sawed to wood pieces in certain sizes by wood chipper and stored in material warehouse, clean up tothe impurities, such as fines, earth and sands, in the wood pieces through screening.

2.Fiber preparation section

Feeding the wood pieces into the boiling apparatus evenly to cook and sofen through sequeezing and dewatering aftertransfering them into the defiberator pre-heating bins/humidifying bins by the transfering equipment in order to separate thefibers easily. The cooked wood pieces will be seperated to fibers under the forces of heat and machine. Then mix the wet fibersand heated dry medias, and keep the fibers suspending in the drying medias under the high speed force of the high-pressure airflow, and the moisture in the fibers will be taken away by the dry media. Afterwards, the fiber will drop the force of cycloneseparator onto the reversible belt conveyor to be transferred to the pavement bins for temporary storing.

3.Forming and hot pressing section

The dried fibers are transferred into the paver metering bin by the pneumatic system, and the paving rolls of the mechanicvacuum paver paves the fibers onto the circular conveyor. And the air will be sucked away by the mesh belts, under which thereis vacuum case forming negative pressure, as while, the fibers are sucked on the mesh belt and form slabs gradualy. In the nextmoment, the fluffy slabs will be compacted by the pre-press machine, and be sawed vertically and longitudinally to lengthsrequired, and then the slabs will be transferred to the loader by the synchronous conveyor, speed-up conveyor, storing-boardconveyor and extensible conveyor succecssively. After being loaded by the loader, the small machine in the loader will transferthe slabs together with the cantilever belt into the hot press machine. During the tranfering process, the shovel at the front ofthe conveyor belt push the compacted slabs out, and the rough boards will enter the unloader as well as slabs get to the presetposition when the small machine arrives at the termination. Then the small machine draws back as the belt revolve forward. Therevolving speed of the belt is equal to the back speed of the small machine, so that the slabs are relatively static and stay on thehot press. The slabs will be formed to specified thickness under the temperature and pressure of the thermal compressor, and theinside glues will solidify. At last boards of certain strength will be made. Then the boards will be unloaded onto the carrier bythe unloader, and unloaded and transferred to the next process by the discharge machine gradually when the suspension coopgoes down layer by layer.

4.Finishing and sanding section

The thermal-compressed slabs will be cooled through tuning over and transferred to the vertical and horizontal sawingmachine by the roller conveyor to be sawed into medium density fiberboard in required sizes, and at last, to be separated,stacked, packed and transferred to the warehouse after sanding.