newest MDF wood panel production lines
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MDF is a kind of excellecnt substitute for natural wood pnel with wide application. Materials such as wood and other plant fiber after being added suitable urea formaldehyde resin or other adhesives forms 450- 880kg/m3 panels on hot press. MDF is characterized with tight and smooth surface,uniform core layer and good wood working performcance.
This productiong line consists of five technology process flows:
1) Chip preparation section
Wood, branches and wood residues are cut into chips of definite size. Chips from chips silo
will be screened to remove fines,soil and stones.
2) Fiber preparation section
Chips are transported to upper bin of refiner, and positively fed to digester by screw feeder for steaming. Steam chips will be distintegrated to fiber under the force of heat and mechanism.
Mix drying medium and wet fiber which is in the state of suspension with the help of high
pressure air flow,and thus exhaust moisure in fiber via drying medium to ger dry fiber. Dry fiberfalls on belt conveyor through cylone discharge valve, and then be transported to dry fiber bin
for storage.
3) Glue mixing and applying section
Process of glue applying before drying is adotpted.Feed molten paraffin and water-proof
additive to fefiner. Paraffin is mixed with fiber uniformly under the force of refiner plates. Glue
is transported to the below line of fiber discharge valve. With the help of 2830m/s high speed
air flow,glue mist meets and attachs to the surface of fiber. This section can be controlled by
PLC or computer.
4) Mat-forming and hot-pressing section
The fiber after drying is transported to the above of forming machine, and uniformly spread onthe conveying mesh belt in the way of air-flow.Vacuum box equipped below the mesh belt
provides negative pressure and air will be removed via mesh belt,fiber stays on mesh belt and
thereafter forms mats gradually. Fluffy mats will be pressed by pre-press. Pressed mats are cut
into definite length by longitudinal and transversal saw, then transproted to loader passing
through accelerating conveyor, stoage conveyor and extension conveyor. When finishing loading mats,carriage in the loader will feed conveying belt and mats into hot press,at the same time,
shovel head at the front end of conveying belt pushes out pressed board.When carriage coms to terminal,boards have been into unloader,and mats also arrives to due position.Carriage returns,
conveying belt turns forward. Mats are in relative still state and stay on the platen of press when velocity of conveying belt is the same as the returning speed of carriage. Glue in the mats cures ,thanks to temperature and pressure in hot press, and hence boards with definite intensity and
thickness form. Rough boards will be put on support via loader. Outfeeding conveyor will
unload boards one after another to next section when cage comes down.
5) Cooling, sizing and sanding section
Rough boards after air cooling are turned in to cut-to size boards via longitudinal and
transversal saw. And then cut-to-size boards are sanded, sorted, stacked and packed for sorage.
MDF Production line Pictures Show
Click on the button, to understand the production process
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