Manufacturing method for impregnated paper veneer bamboo plywood

Abstract

The invention relates to a manufacturing method for impregnated paper veneer bamboo plywood, which belongs to the field of manufacturing the bamboo plywood of artificial boards. The manufacturing method comprises the following steps: taking a bamboo shade, a bamboo mat and a wood veneer which are applied with a phenolic-resin adhesive and are dried as base materials; using the bamboo shade as a core layer, the bamboo mat as an inner layer and the wood veneer as a surface layer to assemble two base material plate blanks including a bamboo plywood formwork and a composite bamboo floor respectively; arranging metal liner plates on the upper and lower surfaces of the two base material plate blanks; gluing the two base material plate blanks into two base materials in a multilayer thermal pressby adopting a 'hot-hot' process; performing close piling pressure treatment on the two base materials, placing 1 to 2 pieces of impregnated paper on two sides of the base material of the bamboo plywood formwork and one side of the base material of the composite bamboo floor respectively after thick processing of longitudinal and transverse edge cuttings, double-sided sanding and the like, then configuring the two base materials with other apparatuses, putting the materials into the multilayer thermal press respectively, and gluing the materials into two types of impregnated paper veneer bambooplywood through the 'hot-hot' process; and finally, processing the two types of the impregnated paper veneer bamboo plywood into a panel with a steel frame plywood formwork and a composite bamboo floor for outdoor use respectively through different post productions.

Description

technical field [0001] The invention belongs to the field of bamboo plywood manufacturing of wood-based panels Background technique [0002] At present, bamboo plywood in China is mainly used as concrete formwork, and its manufacturing method has been using phenolic resin glue as the adhesive for many years, impregnated paper as the surface layer, impregnated bamboo mat as the inner layer, and impregnated bamboo curtain as the core layer to form a symmetrical structure. The slabs are then glued together in a multi-layer hot press using a "cold-hot-cold" process. There are four major disadvantages in this manufacturing method: First, due to the large thickness deviation of the bamboo curtain, the thickness deviation of the board made of multi-layer bamboo curtain as the main material is often more than 1 to 2 mm, and the board is formed by one-time plastic hot pressing. The thickness of the board cannot be reprocessed, which seriously affects the quality of the bamboo plywoo...

AI Technical Summary

Problems solved by technology

There are four major disadvantages in this manufacturing method: First, due to the large thickness deviation of the bamboo curtain, the thickness deviation of the board made of multi-layer bamboo curtain as the main material is often more than 1 to 2 mm, and the board is formed by one-time plastic hot pressing. The thickness of the board cannot be reprocessed, which seriously affects the quality of the bamboo plywood when pouring concrete; second, due to the unevenness of the surface of the bamboo mat, the degree of plasticization of the board surface is different during hot pressing, resulting in a large difference in the color of the board surface. It has seriously affected the appearance of bamboo plywood and the repeated use times of the formwork; the third is that the hot pressing cycle of the "cold-hot-cold" process is long and the output is low, especially the consumption of heat energy and cooling water is large, and the production cost is high; the fourth is Due to the large thickness deviation of bamboo plywood and the large color difference of the board surface, the product grade is a low-grade concrete formwork, which can only be used for bulk and dismantled concrete pouring construction, and cannot be used as a modern formwork for concrete pouring in the construction industry—steel frame plywood template panel

The above four shortcomings of the bamboo plywood produced by the existing manufacturing method have seriously restricted the application of the product and the development of the industry

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