Phenolic resin bamboo plywood manufacturing process

Abstract

The invention provides a novel and continuous phenolic resin bamboo plywood manufacturing process; the preliminary bamboo decomposition and processing as well as unit desugaring and drying and phenolic resin glue application stages are the same with those of a bamboo plywood production process of the prior art, while the pressurization, the formation, the curing, the heating and the pressure maintenance of bamboo plywood materials are carried out on different equipment, wherein the pressurization of the bamboo plywood materials is carried out on a press on which no heat source needs to be fed in; meanwhile, a special clamp is adopted to maintain the pressure; the formation and the curing of the bamboo plywood materials are carried out in a tunnel-type baker; and a roller conveying device continuously conveys the bamboo plywood during a pressure maintenance process, so that the technical practice in the hot pressing and formation and curing stages in the bamboo plywood production is changed with less investment.

Description

Technical field [0001] According to the summary of the production process of bamboo plywood by the forestry department, the production of bamboo plywood on the market is actually a process of decomposition and compounding of bamboo materials, generally divided into (1) pre-decomposition and processing of materials, (2) unit desugaring Drying and applying phenolic resin glue, (3) three technological stages of hot pressing and molding curing, wherein hot pressing and molding curing technological stage are the most important stage, the present invention relates to the 3rd technological stage in the production of bamboo plywood namely heating The innovation of the production fixture and the reform of the production process in the pressing and forming solidification stage. Background technique [0002] At present, the equipment used in the production process stage of known bamboo plywood hot pressing and forming solidification is a high-tonnage hot press, which is characterized i...

AI Technical Summary

Problems solved by technology

The existing defect of this known general process stage is: the serpentine communicating pipe that has in the hot press steel plate is closed with the outside world, and they adopt deep-hole drilling machine to process out, and machining difficulty is bigger; In production use, The serpentine connecting pipe is frequently subjected to high pressure, high temperature and cooling water, which is prone to deformation and cracks, resulting in steam or oil leakage failures, requiring frequent shutdowns and repairs; in addition, the pressure and heating of bamboo plywood materials are done in one It is carried out on the press at the same time, and the pressure holding process after forming and curing is also carried out on the same press, which takes a long time. This discontinuous and intermittent production process reduces the effective utilization of the hot press ;In order to increase the output, this high-tonnage hot press is usually designed as a multi-layer steel plate type, up to 18 layers, so its hydraulic cylinder needs to be very large, and the stroke of the plunger must also be designed to be very long , which will consume a large amount of hydraulic oil and heat, the production cost is very high, and the equipment manufacturing cost and investment cost are also very huge

However, this known production process of bamboo plywood has formed a practice and has been adopted by equipment manufacturers and bamboo plywood manufacturers for a long time. Since this century, in order to increase production and change this discontinuous production situation, engineers have designed A high-pressure multi-roller press has been developed. High-temperature steam or high-temperature oil is fed into the disc-shaped pipes distributed in the rollers, and the rollers simultaneously transfer pressure and heat to the bamboo rubber sheet material continuously input therebetween, making it Uninterrupted hot pressing, forming and curing in order to continuously produce bamboo plywood. Internationally, this equipment and production process was first adopted and used in Germany, and has been imitated and used in my country in recent years, but it can only manufacture The thinner bamboo plywood or other artificial boards below 10mm, and in order to increase the heat and pressure area of ​​the board material, the diameter of the roller should be designed to be very large, almost as high as a layer and a half. There are as many as 3-4 groups, which will undoubtedly greatly increase the equipment manufacturing cost and investment cost, and its maintenance cost will also increase at the same time.

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