Radial bamboo-wood composite mirror surface formwork and its production method

Abstract

The present invention discloses a radial bamboo-wood laminated mirror surface formwork and a production method of the formwork. The radial bamboo-wood laminated mirror surface formwork is produced by bamboo-wood lamination and hot pressing, with thin bamboo strips laid in radial direction as intermediate layers. The producing procedures include: dip glue film paper, apply glue on wood boards, prepare glued radial thin bamboo strips, lay wood board and thin bamboo strips, and then hot press. The wood-bamboo laminated board has higher strength than bamboo laminated boards, and the surface is more smooth than the surface of plywood boards; the utilization rate of bamboo is increased from 55% to 90%, and the cost is reduced by 40% or more; the novel formwork produced with radial thin bamboo strips has higher cost-performance ratio than conventional bamboo laminated boards.

Description

technical field [0001] The invention relates to the wood processing industry, and is a concrete formwork, in particular a radial bamboo-wood composite mirror formwork, and also relates to a production method of the formwork. Background technique [0002] Mirror formwork is mainly used in the concrete construction of high-rise buildings, viaduct decks, water conservancy and other projects that require high appearance quality. The traditional products are wood plywood and bamboo plywood. Among these traditional products, the cost performance is very low, and some performance Although good, the cost is high and the forest resource consumption is large; although some cost is low, but the performance is also poor. Specifically, there are the following shortcomings at present: [0003] 1. Wood plywood has low strength, high water expansion rate, poor impact resistance, and few times of repeated use. It must be made of large-diameter wood, which consumes a lot of forest resources. ...

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Problems solved by technology

[0003] 1. Wood plywood has low strength, high water expansion rate, poor impact resistance, and less repeated use. It must be made of large-diameter wood, which consumes a lot of forest resources.

Therefore, it can only be used in some engineering projects where the concrete volume is not large and the formwork is not reused many times.

[0004] 2. Although the strength of bamboo plywood is higher than that of wood plywood, the surface of bamboo mat has weaving lines, and the surface of the poured concrete has traces of bamboo mat weaving. If these construction defects are to be removed, a painting process must be added

This is not allowed in many municipal engineering constructions, so it can only be used in the construction of low-quality engineering appearance, and cannot be used as a mirror clear water formwork

[0005] Bamboo curtains, bamboo mats, bamboo slices and other bamboo materials used in traditional bamboo plywood are all chord-wise cut strips, which require a large diameter class of bamboo, and must not have defects such as bending and branch grooves. are unusable and become processing waste

In particular, after bamboo is chord-wise cut, the bamboo green and inner yellow are distributed in flakes, and the material is smooth and dense. It cannot be glued in the gluing process, so it has to be treated as waste, so the utilization rate of bamboo only reaches 55%.

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