Difference in mass concentration of airborne dust during circular sawing of five wood-based materials

Fujimoto, Kiyohiko; Takano, Tsutomu; Okumura, Shogo

doi:10.1007/s10086-010-1145-y

Cited by 16 publications

(8 citation statements)

References 5 publications

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“…The machining of wood is always accompanied by the formation of the fine dust particles, which, after being dispersed in the air, can be an inhalable fraction . The mass fraction of the fine particles which penetrate beyond the larynx is known as the thoracic fraction.…”

Section: Introductionmentioning

confidence: 99%

The influence of the thermal modification of pine (Pinus sylvestris L.) wood on the creation of fine dust particles in plane milling

Piernik

Rogoziński

Krauss

et al. 2019

Journal of Occupational Health

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Objectives The aim of the study was to determine the effect of parameters of the thermal modification process and machining on the size distribution of dust particles of Scots pine (Pinus sylvestris L.) generated during lengthwise milling. Method Unmodified wood and thermally modified wood at temperatures of 130, 160, 190, and 220°C were milled lengthwise at cutting depths of 0.5 and 2 mm. Particle size analysis was done using the sieving method. The content of the finest particles was measured using the laser diffraction method. Results The results indicate that at smaller cutting depths, more smaller particles were formed regardless of the wood modification temperature. Thermal treatment of wood does not cause significant differences in the general particle size distribution of dust. However, the content of the finest dust particles depends on the temperature of wood modification. When machined, wood thermally modified at higher temperatures results in the formation of more dust particles that may pose health risks to employees. This is particularly noticeable at a smaller cutting depth. Conclusion With the increase of the temperature of the modification, the share of the finest dust particles, which are a potential threat to the health of employees, increases. To reduce dust emissions during milling of thermally modified wood, the highest possible cutting depth should be used.

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Section: Introductionmentioning

confidence: 99%

The influence of the thermal modification of pine (Pinus sylvestris L.) wood on the creation of fine dust particles in plane milling

Piernik

Rogoziński

Krauss

et al. 2019

Journal of Occupational Health

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“…Wood dust with a grain size in interval 1-500 µm [19][20][21][22][23][24][25][26] is a hygroscopic, low abrasive, explosive bulk mass. The ratio of dust particles depends on the characteristics of the processed material, the parameters of the tool, as well as the technical and technological parameters of the machining process [27][28][29][30][31][32][33].…”

Section: Introductionmentioning

confidence: 99%

Impact of Sycamore Maple Thermal Treatment on a Granulometric Composition of Chips Obtained due to Processing on a CNC Machining Mentre

Kminiak

Dzurenda

2019

Sustainability

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This article deals with a granulometric composition of chips from the milling process of native and thermal treatment maple cuttings on a 5-axial Computer numerical control (CNC) machining center SCM Tech Z5. The aim of this article was to determine the changes in the granulometric composition of chips due to the thermal treatment of wood and to assess the potential risk of the creation of harmful dust fractions. Cuttings were milled with a shank cutter with exchangeable razor blades at feed speed vf = 1 ÷ 5 m·min−1 and material removal e = 3 mm. The thermal treatment in order to modify the color of the maple wood was done with water vapour at temperatures of tI = 112.5 ± 2.5 °C for a period of τ = 5.5 h (Mode I), tII = 127.5 ± 2.5 °C for a period of τ = 6.5 h (Mode II), and tIII = 137.5 ± 2.5 °C for a period of τ = 7.5 h (Mode III). The granulometric composition of the chips was detected by sifting. A granulometric analysis of the chips provided that more than 2/3 of the produced chips are a coarse fraction consisting of flat chips with dimensions over 1 mm. Dust fractions smaller than 500 μm form isometric grains, i.e., chips having approximately the same size in all three dimensions. Inhalable dust particles, smaller than 125 μm, do not exceed a 2.5% share. The granulometric analysis of chips shows that the thermal treatment of maple wood does not create respirable fractions, and therefore, the thermal treatment of the wood does not have a negative impact on the living and working environments.

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“…Despite the significant differences in this respect between individual setups, the dust concentration values were below 0.5 mg/m 3 . Fujimoto et al [2] observed significantly higher levels of air dust when sawing particleboard. They achieved 1.13 and 2.84 mg/m 3 for rotational speeds of the saw of 2000 and 3000 rpm, respectively, with feed per tooth at 0.05 mm.…”

Section: Resultsmentioning

confidence: 98%

“…Beech wood is a source about 50% more dust than pine. In a study on sawing wood and wood-based materials, Fujimoto et al [2] states that the mass concentration of respirable dust from particleboard and tropical hardwood plywood was higher than from sogi wood (Cryptomeria japonica), softwood plywood, and MDF. In case of thermally modified wood, the modification temperature has an influence on fine dust created during machining [3,4].…”

Section: Introductionmentioning

confidence: 99%

Influence of Exhaust System Setup on Working Zone Pollution by Dust during Sawing of Particleboards

Pałubicki

Hlásková

Rogoziński

2020

IJERPH

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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.

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Difference in mass concentration of airborne dust during circular sawing of five wood-based materials

Cited by 16 publications

References 5 publications

The influence of the thermal modification of pine (Pinus sylvestris L.) wood on the creation of fine dust particles in plane milling

The influence of the thermal modification of pine (Pinus sylvestris L.) wood on the creation of fine dust particles in plane milling

Impact of Sycamore Maple Thermal Treatment on a Granulometric Composition of Chips Obtained due to Processing on a CNC Machining Mentre

Influence of Exhaust System Setup on Working Zone Pollution by Dust during Sawing of Particleboards

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