Carbonization wood finger-joint glued-laminated timber and its manufacturing method

Abstract

The invention relates to a carbonized figure jointed glulam lumber and a manufacturing method. The carbonized figure jointed glulam lumber is a one-layer integrated board, or one or several layers of lateral battens laying in the sandwich layer and the integrated board with more than two layers is glued in parallel in the direction of thickness. Each layer of the integrated board is made of standard battens formed by gluing many short battens through finger-jointing and tenoning, and then the standard width is formed by gelatinizing on the side of the batten and gluing and joining in parallel. The process of the method includes: log truncation, sawing, carbonization, chopping, finger-jointing, repairing, sanding and repairing; second glue jointing: gelatinizing; testing, warehousing. The advantages are that part of the chemical and physical properties of wood are changed permanently; hydrophilic property of the lumber is reduced and the inner stress is eliminated completely; the color of the wood is darkened and the wood texture is clear; the contained resin inside the wood is removed so that the wood can be glued and finished; the drying operation is substituted by the high temperature carbonization technique; the carbonized figure jointed glulam lumber is of stable size and shape, of no craze and resin and of clear texture and good durability.

Description

technical field [0001] The invention relates to a method for manufacturing carbonized wood finger-joined glulam, which belongs to the technical field of wood processing. Background technique [0002] Glued-Laminated Timber, also known as glued wood, is a kind of wood that is sawed into planks or strips, dried to the required moisture content, and various defects (such as dead knots, holes, insect eyes, decay, etc.) etc.), and then joined into a certain length by finger-joining, and parallel to the direction of the fiber, it is a plate or square material that is glued along its length, width or thickness direction with an adhesive. Glulam is not only used for building structural materials, but also gradually applied in indoor furniture and decoration. Glulam has the following characteristics: Glulam is a material made of short and small materials glued together, so it can make oversized materials use less, inferior materials can be better used, and improve the utilization ra...

AI Technical Summary

Problems solved by technology

However, the existing glulam is still a naturally grown biomass material, which has disadvantages such as anisotropy, moisture absorption and desorption due to hydrophilic hydroxyl groups, easy deformation and dimensional instability during use.

Especially the glulam made of artificial forest wood, due to the large proportion of early wood in the wood, large growth stress, and poor material quality, it will be affected by shrinkage and swelling during manufacture and use, and its size will be unstable; it is not completed in the production process. Elimination of internal stress leads to large deformation of the product; rich in nutrients and extracts are prone to discoloration, decay, and insects, which affect its furniture manufacturing, interior decoration, and corrosion resistance that require high material and dimensional stability. Applications in demanding outdoor materials and other fields

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