Bending method of bamboos in high-temperature and high-pressure steam tank

Abstract

The invention discloses a bending method of bamboos in a high-temperature and high-pressure steam tank. The bending method comprises the following steps: after inner sections of round bamboo poles needing to be bent are got through for filling of clean sand, the two ends of the round bamboo poles are sealed, and cross sections of bamboo walls are not sealed; the treated round bamboo poles are placed on a special bending mold frame with rollers for fixation, and are pushed into a steam tank with a rail through the rail for closing; high-temperature and high-pressure steam is opened for softening the bamboo poles, and at the same time, the bamboo poles are bent by using weight round iron bars on the bending mold frame; spraying evaporation is stopped; the steam tank is opened to take out themold frame with the bent bamboo poles; the bent bamboo poles are locked, fixed and shaped; and aftertreatment is performed on the bent bamboo poles. Semi-celluloses with high moisture absorptivity inthe bamboos and amorphous region parts in the celluloses are degraded, so that the moisture absorptivity of the bamboos is reduced, the size stability of the bamboos is improved, and the cracking deformation possibility of the bamboos is reduced.

Description

technical field [0001] The invention relates to the technical field of material preparation and processing, in particular to a method for bending bamboo in a high-temperature and high-pressure steam tank. Background technique [0002] As an alternative supplementary material to energy-intensive steel, concrete, etc., wood material is an environmentally friendly and sustainable biomass material. Bamboo is one of the fastest growing plants on the earth. It is widely distributed in China, and bamboo resources are very rich. China's bamboo industry has always been at the forefront in the world. How to use bamboo resources more efficiently and reasonably is our never-ending pursuit. [0003] In many bamboo products, curved members are often used, especially in round bamboo furniture. Some are spliced, but this method is not beautiful, so the round bamboo is usually bent directly, and the components obtained in this way can greatly enhance the visual effect and value of the pro...

AI Technical Summary

Problems solved by technology

However, the most commonly used bending method in the world is to use fire to bend manually. This method has many disadvantages: (1) low efficiency; (2) due to manual bending, it is difficult to achieve uniform bending components; (3) fire is difficult Make the bent parts of the bamboo heated evenly and cause damage when bent; (4) Skilled workers are required to operate; (5) Fire roasting will change the color of some parts, usually the local color will become darker, making the color of the whole bent parts inconsistent, affecting the appearance

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