The 180-500m³/day MDF/HDF production line uses raw material through chips preparation, fiber manufacturing, glue dosing system, forming and hot pressing, cooling &trimming and sanding section to make MDF/HDF board. The final size can be 4 x 8, 6 x 8, 6 x 9, 4 x 12, 6 x 12, 6 x 18. The MDF/HDF board has homogeneous structure, smooth surface, good machining specification and manufacture performance. It is the ideal substitute of nature wood.
(500m³/d MDF Production Line Flow chart)
- Chips Preparation Section: The raw material is reduced into sized wood-chip, then the wood-chip is conveyed into a chip silo for temporary storing, via swinging screen to remove small particles, mud and sand.
- Fiber Preparation Section: Wood-chip out-feeding from pre-heat silo, entering digester vessel via plug-screw feeder to cook and soften the wood-chips, the cooked wood chip is reduced into fiber by the function of heat and mechanical movement. Then the wet fiber is conveyed by high-speed & high-pressure wind via cyclone &rotary discharge fall to the forward-backward belt conveyor, then sent to forming metering silo.
- Glue Dosing System: Our technique is glue dosing before drying. Melt paraffin is sent to the de-fiberator, mixed homogeneous with the fiber. The glue mist adheres to the surface of fiber by the high-speed wind-flow in the drying pipe.
- Forming and Hot-Pressing Section: Dry fiber is sent into the metering silo by wind-conveying system. There is vacuum box under the mesh belt. Fiber is adhered on the mesh belt, thus forming a mat. Pressed by the pre-press, the mat becomes into a relatively density mat, then cut into sized mat by mat-transversal-longitudinal saw. Transported by synchronous-belt-conveyor, acceleration-belt-conveyor, storing-belt-conveyor, etc. The mat is carried to board loader. The caul-less belt-tray of the loader transports the mats into hot press, meanwhile, the pressed rough board is pushed out on the un-loader. The mat stays on the press-platen of a hot press, then it is pressed into a certain thickness under the function of high-pressure and high temperature. The un-loader discharges the board one by one.
- Cooling &Trimming, Sanding section: The board after hot pressing, passing a board-turning-cooling machine, roller-conveyor, then entering transversal-longitudinal saw, is cut into size medium density fiberboard. After sanding, checking, rating, stacking, packing, finally the board is sent into ware-house for storage.
(285 m³/d MDF Production Line Flow chart)
- Adopts reliable, steady running de-fiberator made under latest-tech, which can control the fiber quality and meet the productive capacity requirement, greatly reduce the consumption of electricity and heat.
- The pre-press adopts mesh belt, upper and lower belt are driven separately, to avoid the influence on the mat quality caused by speed-difference of the two belts and wind discharge problem.
- Mat conveying line is composed by flexible belt conveyer and saw acceleration belt conveyer, lest the mat distort during accelerating and departing.
- Hot pressing adopts the technical-process-curve of all position control, to ensure the board section-structure-density and stable quality.
- The wide-belt-sander improves the board finish quality, lowers the running cost.
- The electric control system adopts the world-advanced PLC control system, with on-site communication BUS control, the customer can set the technical-process-data, operate and monitor the machine on line, record the mal-function during the production. The computer -control is more reliable, and the line can work stably.
Economic and technical data
| Item |
Unit |
Specification |
Remarks |
| Capacity |
m³/d |
180 |
270 |
400 |
500 |
Based on 15mm, density 750kg/m³ |
| Hot press board |
|
Single board |
Single board |
Double board |
Double board |
|
| Final board size |
mm |
1220x2440x(10~25) |
1220x2440x(8~15) |
1220x2440x(8~20) |
1220x2440x(8~20) |
|
| Annual working time |
d |
300 |
300 |
300 |
300 |
|
| Daily working time |
hours |
22.5 |
22.5 |
22.5 |
22.5 |
|
| Wood material consumption |
t/a |
4.32x104 |
6.5x104 |
9.6x104 |
1.2x105 |
Boney dry |
| Resin consumption |
t/a |
4536 |
6700 |
~10800 |
~13200 |
Solid content is 100% |
| Paraffin consumption |
t/a |
430 |
650 |
~1500 |
~1800 |
Solid paraffin |
| Ammonium chloride consumption |
t/a |
~45 |
~67 |
~160 |
~200 |
Purity97% |
| Process water consumption |
m³/h |
6 |
8 |
12 |
15 |
Exclude boiler, glue making,etc |
| Heat energy consumption |
Gcal/h |
~12 |
~15 |
18 |
22 |
Exclude heating,glue making,etc |
| eletric power installation |
kW |
~3800 |
4400 |
~6100 |
~7800 |
Exclude boiler,glue making,etc |
| Persons in works |
person |
90 |
90 |
108 |
108 |
Subject local condition |
| workers on production line |
person |
51 |
51 |
51 |
51 |
|
| Auxiliary worker |
person |
42 |
42 |
42 |
42 |
|
| Managers |
person |
6 |
6 |
6 |
6 |
|
| Mechanic |
person |
9 |
9 |
9 |
9 |
|
| Works area |
m³ |
6000 |
6500 |
~7000 |
~7000 |
|
| Note:the above data are subject to change according to production process and raw material. |
Drum chipper
Refiner
Forming line
Hot press
Sanding machine
Audited Supplier 
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