Method for producing medium density fiberboard from wood waste
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A wood waste, medium-density technology, applied in wood processing appliances, applications, household components, etc., can solve problems such as waste, and achieve the effect of improving utilization, high yield, and avoiding mildew
Inactive Publication Date: 2019-02-12
广西横州丽冠环保材料有限公司
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Description
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Problems solved by technology
Traditional timber factories use these wastes as boiler fuel, causing a lot of waste
Method used
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Embodiment l
[0048] Production of MDF from wood waste can be accomplished using the following steps:
[0049] (1) Cut wood waste into pieces with a length less than 5 cm and a width less than 1 cm.
[0050] (2) Sieve the wood fragments obtained above to remove silt and debris with a particle size of less than 0.2 cm.
[0051] (3) Transport the screened wood chips to the cooking tank, and iron removal treatment is required during the transport process.
[0052] (4) After transporting the wood fragments into the cooking tank, add an appropriate amount of water to soak for 10-30 minutes; and inject steam from the top or upper part of the cooking tank, the pressure in the cooking tank is 0.16-0.2Mpa, and cook for 1-4 minutes to ensure The water content of the cork chips obtained after cooking is 70-85%.
[0053] (5) The cork chips obtained by cooking are transported to a disc refiner for grinding until the fiber length is less than 0.8 cm.
[0054] (6) Add modified paraffin and glue to the ...
Embodiment 2
[0059] Production of MDF from wood waste can be accomplished using the following steps:
[0060] (1) Cut wood waste into pieces with a length less than 5 cm and a width less than 1 cm.
[0061] (2) Sieve the wood fragments obtained above to remove silt and debris with a particle size of less than 0.2 cm.
[0062] (3) Transport the screened wood chips to the cooking tank, and iron removal treatment is required during the transport process.
[0063](4) After transporting the wood fragments into the cooking tank, add an appropriate amount of water to soak for 10-30 minutes; and inject steam from the top or upper part of the cooking tank, the pressure in the cooking tank is 0.16-0.2Mpa, and cook for 1-4 minutes to ensure The water content of the cork chips obtained after cooking is 70-85%.
[0064] (5) The cork chips obtained by cooking are transported to a disc refiner for grinding until the fiber length is less than 0.8 cm.
[0065] (6) Add modified paraffin and glue to the g...
the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
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Abstract
The invention discloses a method for producing a medium density fiberboard from wood waste. The method comprises the production steps that 1, the wood waste is cut into fragments; 2, the wood fragments are screened, and sediment and scraps are removed; 3, the wood fragments are conveyed into a cooking pot after iron is removed; 4, the wood fragments are cooked through steam after being conveyed into the cooking pot; 5, the wood fragments are ground by a grinding machine till the fiber length is smaller than 0.8cm; 6, modified paraffin and resin adhesive are added into the ground fiber for mixing, the mixture is sprayed into a drying pipeline and dried through hot air, and fiber with the water content being 7-10% is obtained; 7, the fiber is laid through a laying machine to be a continuousloose board blank belt; the board blank belt is leveled through a leveling roller and prepressed, and the prepressed board blank is trimmed and cut off and then is fed into a hot press to be pressed to obtain a blank board; 8, the blank board is subjected to time ageing of 48 h or longer and subjected to two-face polishing, edge saw cutting is carried out, a finished board is obtained, inspectionand classification are carried out, and the medium density fiberboard is obtained. The fiberboard obtained through the method is high in density, good in waterproof performance and high in strength.
Description
technical field [0001] The invention belongs to the technical field of wood-based panels, in particular to a method for producing medium-density fiberboards by using wood waste. Background technique [0002] Wood-based panels (( wood based panel ), boards or molded products made of wood or other non-wood plants as raw materials, separated into various unit materials by certain mechanical processing, and glued with or without adhesives and other additives. It mainly includes three major categories of products: plywood, shaving (particle) board and fiberboard, with hundreds of extended products and deep-processed products. Density board, also known as fiberboard, is a man-made board made of wood fiber or other plant fiber and applied with urea-formaldehyde resin or other suitable adhesives. According to its density, it can be divided into high-density board, medium-density board and low-density board. [0003] In 2008, my country's wood-based panel output was nearly 90 mill...
Claims
the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
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Application Information
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