Method for drying fraxinus mandshurica wood floor base material

Abstract

The invention provides a method for drying a fraxinus mandshurica wood floor base material, which comprises the following steps of placing the fraxinus mandshurica wood floor base material in a drying kiln, enabling the temperature to rise to 50-56 DEG C at the speed of 0.8-1.6 DEG C per hour, and keeping the temperature for 7.5-8 hours; spraying steam at the temperature of 120-180 DEG C into the drying kiln, enabling air velocity of the steam to be 6-12m / s, enabling the temperature to rise to 60 DEG C, and enabling the relative humidify to rise to 60%-65%; keeping the temperature of 60 DEG C in the drying kiln to be stable, removing moisture for 6-7days and evenly reducing the relative humidify by 3-10%; detecting the water content of the fraxinus mandshurica wood floor base material, adding the steam into the drying kiln until the relative humidify rises to 60%-65% when the water content stops reducing, and then keeping the temperature and the relative humidity for 3-4 days; and repeating the former two steps until the water content of the fraxinus mandshurica wood floor base material reaches to an acceptance line. The method has good drying effects, high rate of finished products and low defective percentage.

Description

technical field [0001] The invention relates to the field of wood drying, in particular to a method for drying ash wood floor substrates. Background technique [0002] Wood drying can be divided into two categories: natural drying and artificial drying. Natural drying Through natural ventilation or forced ventilation, the wood absorbs the heat in the atmosphere and evaporates the moisture in the wood to achieve the purpose of drying. The main disadvantages of natural drying are that it occupies a large area, the final moisture content is high, and the drying time is long. At present, the commonly used artificial drying methods include conventional drying, high temperature drying, dehumidification drying, solar drying, vacuum drying, microwave and high frequency drying, and flue gas drying. Among all artificial drying methods, conventional drying has the advantages of long history, mature technology, fault drying quality, and easy realization of large-scale industrial dryin...

AI Technical Summary

Problems solved by technology

[0003] Manchurian ash wood flooring mainly includes drying, groove and varnish processes. Due to the high density of Mandshurica ash, the drying process is particularly important in the production process. If the drying time is too long, although the yield is high, it often leads to production The decline in efficiency, the drying time is too short, and the process requirements for making wooden floors are met. Often due to the difference in water content between the inner and outer surfaces of Fraxinus mandshurica, the rate of defective products increases and great waste is caused.

The existing wooden floor, especially the drying process using Mandshurica mandshurica as the base material of the wooden floor, generally produces a defective rate of 3-6%, which greatly increases the production cost during the production process