Abstract
Air pollution by wood dust in furniture production sites is an important hygiene issue. The dust is created by all types of wood and wood-based material machining, and its concentration in the working zone surrounding the machining stand depends on the effectiveness of the dust exhaust system. In present research, three setups of the dust extraction system for a conventional table sawing machine are considered while machining particleboards. The results showed a high impact of the exhaust system connection setup on the dust concentration in the air surrounding the sawing machine work stand. The use of both main and auxiliary sawdust extraction connectors together ensured the highest clearness of the air, with only 0.5 mg/m3 of dust concentration. Closing the upper hood leads to a concentration five times higher, while disconnecting it results in a ten times higher dust content. The finest dust particles (<1 µm), however, are the most numerous in the case of closing the hood.
Highlights
Air dustiness in furniture production is the result of the creation of fine waste in the form of dust particles during woodworking
·ρ, m3 where ni is the average number concentration of dust particles measured on the i-channel of the counter, di is the average particle size of the i-channel, and ρ is the density of the wood substance
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Summary
Air dustiness in furniture production is the result of the creation of fine waste in the form of dust particles during woodworking. The amount of dust depends on the type of processed material, the method of processing, and the parameters used in processing. The machining of all wood materials used, including solid wood, wood materials, and thermally modified wood, is a source of air dustiness. Palmqvist and Gustafsson [1] concluded that different species of wood generate different levels of dust. Their experiments showed that the MDF (medium-density fibreboard) planing and milling creates up to six times as much dust as pine wood machining.
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