Hollow recombined bamboo and its manufacturing method

Abstract

The invention provides a hollow recombined bamboo and manufacturing method thereof. The hollow recombined bamboo is formed through forming holes in the longitudinal direction inside a plate pasted and connected by bamboo bunches, bamboo filaments or tiny bamboo splits. The manufacturing method includes the steps: splitting the original bamboo into bamboo bunches, bamboo filaments or tiny bamboo splits in the longitudinal direction; softening after thermal treatment, and then drying and gum dipping; paving bamboo units in a mould pressing groove by different levels uniformly; paving a moulded rod in the direction parallel to the longitudinal direction of the bamboo bunches, bamboo filaments or tiny bamboo splits as per the requirements of hollow rate; gluing slabs in the mould pressing groove through high-frequency hot pressing or cold pressing pressure maintaining and baking, demoulding, removing the mould pressing groove or a high-pressure inflating device, or adopting permanently filling; and then forming the hollow recombined bamboo finished product through follow-up machining. The hollow recombined bamboo and the manufacturing method thereof can be applied in the field of building beam columns, structural members, furniture and decorating materials.

Description

technical field [0001] The invention belongs to the field of resource-saving and environment-friendly structural materials, and relates to a hollow recombined bamboo and a manufacturing method thereof. Background technique [0002] my country is the country with the most abundant bamboo resources in the world. In recent years, with the shortage of timber resources in the world, it is becoming more and more important to use timber and bamboo resources rationally and effectively. [0003] In the existing technology, the main recombined bamboo technologies used in the fields of construction and decoration are: (1) Bamboo raft recombination technology: bamboo materials are processed into thick bamboo slabs, alone, or combined with combed wood bundles, Appropriate amount of veneer strips, dried to a moisture content of 8-15%, glued together with phenolic resin. (2) Bamboo fiber-reinforced composite material manufacturing technology: The bamboo material is decomposed into loose ...

AI Technical Summary

Problems solved by technology

[0005] With the widespread use of recombined bamboo in the fields of construction, furniture, decoration, flooring, etc., its shortcomings have become increasingly prominent. Since recombined bamboo is densely pressed with loose bamboo bundles or bamboo fibers with a certain shape, the product’s The density is high, the product is heavy, the consumption of bamboo is large, and the amount of adhesive is large

[0006] At present, there are hollow particleboards produced by extrusion on the market, but the output is small and the scope of use is small. Hollow particleboards have the following disadvantages: 1) Using scraps or fine shavings as raw materials, the longitudinal direction is small, and cannot be used for construction. Structural materials such as beams and columns; 2) Extrusion is often used for production, which has low production efficiency and low longitudinal static bending strength; 3) The product has high wet swelling performance and poor stability

Due to the high density of bamboo itself, after pressing, the weight of recombined bamboo products is relatively large, so it is not suitable for construction

At the same time, bamboo units are generally recombined into larger-sized or larger-format recombined materials, resulting in the recombined bamboo is prone to internal stress during use, making the recombined bamboo prone to defects such as cracking, which affects product performance. In addition, because bamboo passes through The debonding unit is densely pressed as a whole, so more bamboo raw materials are required, and the adhesive is larger, which leads to the increase of the cost of recombined bamboo, which is not easy to process, and is not conducive to environmental protection.

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