Experimental Research of the Process of Acoustic Processing of Canvases of Super Thin Basalt Fiber

Abstract

The purpose of performing an experimental study of the process of acoustic processing of samples of canvases made from superthin basalt fiber obtained at an operating industrial plant that realizes the duplex technology of their production is to confirm the effect of reducing the content of non-fibrous inclusions in such canvases and to formulate recommendations for assigning parameters for acoustic processing. The problem of reducing the percentage of non-fibrous inclusions in canvas basalt fiber is quite urgent. Their presence reduces the quality of products, non-fibrous inclusions are capable of causing minor injuries on contact with canvases and they are subjects of environmental pollution. The causes of non-fibrous inclusions lie in the physical parameters of the technological process and the technical disadvantages of the equipment in the production of basalt fiber. However, even with the optimal adjustment of the production process, basalt fiber canvases contain a fairly large number of non-fibrous inclusions. Samples of canvases prepared for the experiment were obtained during the adjustment of equipment. Therefore, they contain substantially more non-fibrous inclusions than with the debugged technology of their production, which makes it possible to obtain a more visual effect from the impact on them by sound. A series of experiments with a large number of samples, identical in size and similar visually selected from one section of the web, made it possible to determine the rational frequency and level of the sound acting on them. The average weight of all non-fibrous inclusions dropped from each sample under the influence of a different frequency sound was determined, as well as the percentage of inclusions in the samples before and after the acoustic impact. The presented data give grounds to assert the usefulness of the effect of the acoustic field on the primary canvases already formed to reduce the content of non-fibrous inclusions therein.