MDF / HDF Multi-Openings Production Line with Capacity of 180~500 cbm per day
Introduction
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.
Summary of process flow
(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)
Main characteristics of MDF production line
- 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.
Main 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. |
Key equipment of particle board production line
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MDF / HDF Multi-Openings Production Line with Capacity of 180~500 m³ / Day Images
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