Production process for wood-plastic biological composite board

Abstract

The invention discloses a production process for a wood-plastic biological composite board. The adopted technical scheme comprises the steps of: 1, collecting and processing raw materials; 2, preparing wood shavings; 3, drying and separating; 4, mat-forming and hot-pressing; 5, processing a rough board; and 6, sanding. The invention has the advantages that: the traditional extrusion forming production method of the wood-plastic composite board is replaced by adopting a hot pressing mode, and a large-size wood-plastic composite board can be produced; by adopting the wood-plastic composite board processed by adopting a hot pressing process, the actual blank thickness as a main evaluation index is adopted in the hot pressing process, and a vaporization stage and a solidification stabilization stage are added during the hot pressing processing to ensure that the blank thickness is more accurate and the surface strength, the surface density and the core layer density of blanks are more controllable and stable, thus the rejection rate is reduced and the stability of the board quality is improved.

Description

technical field [0001] The invention relates to the technical production field of boards, in particular to a production process of wood-plastic bio-composite boards. Background technique [0002] The production and use of wood-based panels is one of the important ways to save and efficiently utilize timber resources. The wood-based panel manufacturing industry has become the core industry for the comprehensive utilization of wood and the conservation of wood resources in my country's wood industry. The contradiction between the supply and demand of timber resources and the protection of the ecological environment are of positive and important significance. [0003] Particleboard, as one of the main types of wood-based panels, has developed rapidly by virtue of its excellent characteristics, wide application fields and relatively low market price in the course of more than half a century of development since it came out in the 1940s. , has now spread to all continents of the ...

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Problems solved by technology

[0006] In the prior art, in the process of producing wood-plastic bio-shaving composite particleboard, the wood chips are mainly processed into twigs and wood processing residues instead of stumps with a high yield rate; the thermoplastic raw materials used can be new raw materials , It can also be recycled raw materials, but the recycled raw materials must be recycled and granulated before they can be used; the production of slabs is completed by extruders, and the produced wood-plastic bio-composite board products have a large format Limited by the production process, it is impossible to obtain large-format composite particleboard; in the hot-pressing process, the hot-pressing method with time as the main evaluation index is adopted. When the time is reached, the hot-pressing process is over, and the resulting composite particleboard slab The poor stability brings certain difficulties to the secondary processing of the composite particleboard, so that the subsequent wood-plastic composite board products cannot be continuously produced, which increases the production cost

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