Method for manufacturing medium-density fiberboards

A production method and fiberboard technology, applied in the production field of medium density fiberboard, can solve the problems of environmental pollution, poor moisture resistance, rising production costs, etc., and achieve the effects of good physical and mechanical properties, lower production costs, and stable internal structure.

Inactive Publication Date: 2013-07-10
FOJON GRP
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

Due to the variations in anatomical properties and basic densities of roots and branches with different diameters, the boards produced by mixing the two raw materials with different proportions are different. For example, the moisture resistance of fiberboard is poor, and it expands after absorbing water. The coefficient is large, the nail holding power is poor, and the screws are easy to loosen after tightening, and the sanding dust generated during the fiberboard production process and the edge strips generated by the blank board cutting are all discarded as waste. to cause environmental pollution, and secondly, it led to the increase of production costs, and also caused the waste of limited forest resources

Method used

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  • Method for manufacturing medium-density fiberboards

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Embodiment Construction

[0031] 1) Cutting: first cut the root and branch wood into 60×30×5mm wood chips according to the ratio, and at the same time take the screened sanding powder and the sawdust-like edge scraps according to the ratio for later use ;

[0032] 2) Cleaning: Wash the wood chips prepared from root and branch wood with water to remove the soil and other impurities attached to the surface of the wood chips, so as to ensure that the clean wood chips are transported to the next process;

[0033] 3) Cooking: Put the cleaned wood chips into the pre-cooking tank for preliminary softening, and then put them into the cooking tank for cooking to further soften them. The steam pressure in the cooking tank is 0.6-0.75 MPa, and the temperature is 145 —155°C, the cooking time of wood chips is 1-4 minutes; (In the actual production process, due to the changes of wood chip species, the change of loose and impurity ratio, and the change of product specifications, the cooking time, temperature and pres...

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Abstract

The invention relates to a method for manufacturing medium-density fiberboards, and belongs to the technical field of manufacture of fiberboards. The method includes proportionally cutting root-wood and brushwood to obtain 60X30X5mm wood chips; carrying out cleaning, cooking, hot-grinding and drying procedures for the wood chips to obtain fibers; proportionally and sufficiently mixing the fibers with sanding powder and sawdust-shaped edge strip and corner materials to obtain mixtures; and carrying out gluing, paving and hot-pressing procedures for the mixtures to manufacture finished medium-density fiberboard products. The method has the advantages that the manufacturing cost of the medium-density fiberboards is reduced to a certain extent; problems that sanding dust which is generated in existing fiberboard manufacturing procedures and edge strip and corner materials which are generated during blank plate cutting are discarded as rejected materials, environments are polluted, the manufacturing cost is increased and limited forest resources are wasted are solved; and the fiberboards manufactured by the method are stable in internal structure, low in deformation and good in physical and mechanical performance.

Description

technical field [0001] The invention relates to a production method of medium density fiberboard, belonging to the technical field of fiberboard production. Background technique [0002] Fiberboard, also known as density board, is one of the main types of wood-based panels. It is made of wood fiber or other plant fibers. After crushing, fiber separation, drying, adding suitable adhesives, and then hot pressing and sanding The finished board can be divided into high-density board, medium-density board and low-density board according to its density. The raw materials for the production of MDF come from a wide range of sources, especially with the increasing protection of forestry resources in our country and the continuous scarcity of forest resources, it is the main way to effectively and rationally use limited forest resources. At present, the main raw materials for the production of MDF in my country are branch wood and root wood, that is, branches, branches and roots of t...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B27N3/04B27N3/18
Inventor 陈东山杨华峰
Owner FOJON GRP
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