Naslov
Influence of woodworking machine cutting parameters on the surrounding air dustiness

Autori
Kos, Ankica ; Beljo-Lučić, Ružica ; Šega, Krešimir ; Rapp, A.O.

Izvornik
Holz als Roh- und Werkstoff (0018-3768) 62 (2004), 3; 169-176

Vrsta, podvrsta i kategorija rada
Radovi u časopisima, članak, znanstveni

Ključne riječi
air dustiness; woodworking machines; mass concentration of total wood dust

Sažetak
From epidemiological studies experts conclude that wood workers are subjected to an increased health risk of nose and nasal cavity cancer under the influence of oak- and beech-wood dust. That is why, pursuant to Croatian regulations, the recommended limit mass concentration for oak- and beech-wood respirable dust is 1 mg/m3 and for total dust 3 mg/m3. In this study the dustiness of the air surrounding woodworking machines has been researched in two woodworking companies, furniture factory and carpentry. Sampling of respirable and total wood dust was carried out during workday by the method of personal samplers fixed on workers suit and then the daily dose of workers exposure was determined. Measured mass concentrations exceeded the Croatian limit values: in the furniture factory 16 % of samples for respirable dust and 18 % for total dust and in the carpentry 38 % for respirable dust and 65 % of all samples for total dust. Measuring results in the furniture factory and carpentry are in accordance with the German regulations TRGS-553. In both woodworking companies, dustiness is lower near the working machines with cutting parameters that have as a consequence higher values of average chip thickness. The planers produced chips of average thickness higher than 0.1 mm whereas the other woodworking machines produced chips of average thickness ranging between 3 and 20 ?m. The chip thickness can be controlled by optimum cutting parameters i.e. by choosing optimum ratio between feed speed, teeth number and rotational frequency. In the furniture factory, mass concentration of respirable particles was higher near the band sander than near the circular saw. Both woodworking machines produced more dust than the following ones ? milling machine, band saw and planer. There was no significant difference between measured mass concentrations of wood dust near the band saw, milling machine and planer. The impact of woodworking material is important but not as much as the influence of machine cutting parameters. The mass concentration of respirable wood dust is higher in sawing fiberboard with circular saw than in sawing particleboard, while the mass concentration of total wood dust is approximately the same.

Izvorni jezik
Engleski

Znanstvena područja
Javno zdravstvo i zdravstvena zaštita, Šumarstvo, Biotehnologija

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