Step for flattening arc-shaped bamboo remaining bamboo outer and inner surface layer, flattening method using the same step and flattening device

Abstract

The present invention discloses process and apparatus for flattening arc bamboo sheet. During flattening arc bamboo sheet, radial force is applied while dispersed crack-preventing holes are formed in the yellow layer of the arc bamboo sheet. The process of flattening arc bamboo sheet includes the first heating to soften bamboo material, and the subsequent flattening. The apparatus for flattening arc bamboo sheet includes one or several pairs of axially parallel rolls, and each roll pair includes one smooth roll and one nailed roll with dispersed lugs in the surface. The present invention has the advantages of less reduction of the strength of bamboo material, high utilization rate of bamboo resource and no cracking caused by flattening.

Description

technical field [0001] The invention relates to the field of bamboo processing, in particular to a bamboo flattening step in the bamboo processing process and a technique for flattening the bamboo with green bamboo spring leaves by applying the flattening step and a flattening device thereof. Background technique [0002] my country is located in the center of bamboo distribution in the world, and the area of ​​bamboo forest ranks first in the world. Because of its special hollow structure, bamboo has a large difference in inner and outer diameters. Therefore, in the process of processing, especially during flattening, smooth rollers located inside and outside the bamboo are generally used for flattening. When applying force to flatten the bamboo, the inner perimeter should be pulled to be the same as the outer perimeter, and the inner surface will inevitably undergo large deformation and breakage. In the Chinese Patent Application No. 03155410.5, a flattening method is discl...

AI Technical Summary

Problems solved by technology

In this method, the expansion of the inner wall of the bamboo is actually the width of the grooves pressed by the convex teeth of the inner roller on the inner wall of the bamboo or the further deformation of the grooves, that is to say, it is the transformation of large cracks in the original bamboo. Because of the large difference between the radial and transverse fiber forces of bamboo, it is easier to crack in the radial direction, so the bamboo with small cracks destroys the overall characteristics of the bamboo, and it is easier to crack along these cracks when it is actually unfolded , resulting in cracking, while the strength of the unfolded bamboo is also greatly reduced

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