Multilayer mesh belt type drying machine for plywood manufacturing

Abstract

The invention relates to the technical field of plywood manufacturing, in particular to a plywood manufacturing multilayer mesh belt type drying machine which comprises a drying shell, an air heater, a material conveying device and a material conveying device, the material conveying device comprises a conveying unit, a fixing block, a material conveying frame and an air supply unit, and the material conveying frame comprises a material conveying frame body, a bearing plate, a sliding plate, a positioning plate and a communicating pipe. According to the plywood drying device, plywood can be subjected to three-stage drying treatment, the suction force borne by the plywood is changed through the change of the water content of the plywood in the drying process, and when the suction force applied to the plywood by the material conveying device is smaller than that applied to the plywood by the material conveying device, drying of the plywood at the stage is completed; the drying time does not need to be manually controlled, the drying degree of the plywood can be accurately controlled, and the quality defects such as bubbling and local degumming of the plywood caused by excessive drying or insufficient drying are avoided.

Description

technical field [0001] The invention relates to the technical field of plywood production, in particular to a multi-layer mesh belt dryer for plywood production. Background technique [0002] Plywood is a three-layer or multi-layer board-like material that is made of wood sections that are peeled into veneers or sliced ​​into thin wood, and then glued with adhesives. Usually, odd-numbered veneers are used, and adjacent layers of veneers are used. The fiber directions are glued perpendicular to each other. Plywood needs to be dried during the production process. Currently, mesh belt dryers are commonly used when drying plywood. [0003] Mesh belt dryer is a continuous drying equipment used in mass production. It is used for drying flake, strip, granular and some paste materials with good air permeability. It has high drying rate, high evaporation intensity and good product quality. Etc. Mesh belt dryers can be divided into single-stage belt dryers, multi-stage belt dryers ...

AI Technical Summary

Problems solved by technology

[0004] There are some problems in the use of the above-mentioned belt dryers: (1) the single-stage belt dryer can only perform single-stage drying treatment on the plywood, the drying effect is poor, and the problem of incomplete drying is prone to occur; (2) The multi-stage belt dryer is actually composed of multiple single-stage belt dryers connected in series. The drying path is long, so the drying effect is significantly improved compared with the single-stage belt dryer, but it occupies a larger area. It is inconvenient to install; (3) The multi-layer belt dryer occupies less land and has a simple structure, but due to the multiple loading and unloading during the operation, the operation is more cumbersome; (4) The existing belt dryer can only The drying time is controlled, but the moisture content of the plywood cannot be controlled, which is prone to over-drying or insufficient drying, resulting in quality defects such as bubbling and partial degumming of the plywood

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