ДОСЛІДЖЕННЯ ВПЛИВУ РЕЖИМНИХ ПАРАМЕТРІВ ПРОЦЕСУ ТЕР-МІЧНОЇ ОБРОБКИ ДЕРЕВИНИ ЯСЕНА НА ФОРМОСТІЙКІСТЬ КОМБІНОВАНИХ МЕБЛЕВИХ ЩИТІВ

Abstract

It has been established that the process of thermal modification of wood is an environmentally friendly way of protecting wood. Thermal modification of wood also makes it possible to significantly improve the appearance of wood of low-grade species by changing their color. Method and the results of experimental research of form stability of the combined furniture boards. The influence of mode parameters of the process of heat treatment of wood on the shape resistance of the received boards is determined. The mathematical and graphical dependence of the form stability of the combined furniture boards on the operating parameters of the process of heat treatment of the wood of ash were obtained. It is substantiated that the flatness of furniture panels is greatly influenced by the technological accuracy of the equipment used in the final calibration of finished panels. It has been investigated that the temperature of the thermal modification process is more influenced by the plane of the combined furniture panel than its duration. It is established that the results of experimental studies of the flatness of combined furniture boards, almost all of them do not meet the requirements of the standard. Only combination furniture panels made from a combination of ash wood sections obtained at a modification temperature of 190 ° C and treatment times of 4 and 10 hours with sections of untreated wood meet the requirements of the standard. The deviations from the flatness of the experimental shield data are 0.29 and 0.34 mm, respectively. The justification is made that the unsatisfactory results can be explained by the fact that the individual parts of which the combined shield consists of react differently with the humidity of the environment. It has been found that the combined furniture panels, the sections of which are treated with temperature t = 220 ° C, have the ability to retain their geometric dimensions and shape better than when treated with temperature t = 160 ° C or without treatment. It is recommended to use the results obtained during student preparation and in production conditions to obtain quality products that meet the requirements of the standards.