Influence of Feed Speed on the Content of Fine Dust during Cutting of Two-Side-Laminated Particleboards

Hlásková, Luďka; Rogoziński, Tomasz; Kopecký, Zdeněk

doi:10.5552/drind.2016.1417

Cited by 14 publications

(13 citation statements)

References 9 publications

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“…Feed rate did not have any clear effect on airborne dust emissions in the process of peripheral milling using standard NC(numerical control)-machines [62]. The same conclusions were confirmed by other authors [63]. An increase in feed rate with open cuts (planing, milling) affects a decrease in percentage of particles up to 100 μm The findings are consistent with other authors who mentioned the ambiguous effect of feed rate on granularity of formed particles in the case of native wood.…”

Section: Feed Ratesupporting

confidence: 70%

Occupational Exposure to Dust Produced when Milling Thermally Modified Wood

Očkajová

Kučerka

Kminiak

et al. 2020

IJERPH

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During production, thermally modified wood is processed using the same machining operations as unmodified wood. Machining wood is always accompanied with the creation of dust particles. The smaller they become, the more hazardous they are. Employees are exposed to a greater health hazard when machining thermally modified wood because a considerable amount of fine dust is produced under the same processing conditions than in the case of unmodified wood. The International Agency for Research on Cancer (IARC) states that wood dust causes cancer of the nasal cavity and paranasal sinuses and of the nasopharynx. Wood dust is also associated with toxic effects, irritation of the eyes, nose and throat, dermatitis, and respiratory system effects which include decreased lung capacity, chronic obstructive pulmonary disease, asthma and allergic reactions. In our research, granular composition of particles resulting from the process of longitudinal milling of heat-treated oak and spruce wood under variable conditions (i.e., the temperature of modification of 160, 180, 200 and 220 °C and feed rate of 6, 10 and 15 m.min−1) are presented in the paper. Sieve analysis was used to determine the granular composition of particles. An increase in fine particle fraction when the temperature of modification rises was confirmed by the research. This can be due to the lower strength of thermally modified wood. Moreover, a different effect of the temperature modification on granularity due to the tree species was observed. In the case of oak wood, changes occurred at a temperature of 160 °C and in the case of spruce wood, changes occurred at the temperatures of 200 and 220 °C. At the temperatures of modification of 200 and 220 °C, the dust fraction (i.e., that occurred in the mesh sieves, particles with the size ≤ 0.08 mm) ranged from 2.99% (oak wood, feed rate of 10 m.min−1) to 8.07% (spruce wood, feed rate of 6 m.min−1). Such particles might have a harmful effect on employee health in wood-processing facilities.

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Section: Feed Ratesupporting

confidence: 70%

Occupational Exposure to Dust Produced when Milling Thermally Modified Wood

Očkajová

Kučerka

Kminiak

et al. 2020

IJERPH

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“…Particle size measurement of the dust taken from milling to determine the content of the smallest particles could not be done by laser particle sizers because there were too many particles whose dimensions were too large and out of range of the laser particle sizers. Therefore, the dust below the sieve of 0.063 mm collected in a bottom holder was taken for measurement and the mass of this dust fraction was considered in the calculations . A set of sieves was used for sieving chips from the plane milling.…”

Section: Methodsmentioning

confidence: 99%

“…In addition to effective extraction systems, dust control in the wood industry should be done using a proper determination of the technological characteristics of the sources of dust creation, in such a way that the fractions of inhalable dust created are kept to the smallest possible amount. It is possible to carry out processing at different parameters—cutting depth, speed of cutting, and feed speed, but it should not adversely affect the quality of the wooden parts produced …”

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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“…The formed chip is a polydispersive bulk mass consisting of coarse, medium coarse, and dust fractions. 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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Influence of Feed Speed on the Content of Fine Dust during Cutting of Two-Side-Laminated Particleboards

Abstract: • This paper deals with the problems of wood dust production during the sawing of two-side-laminated particleboards. It points out the dangerous impact of wood dust particles on people´s health and other

Cited by 14 publications

References 9 publications

Occupational Exposure to Dust Produced when Milling Thermally Modified Wood

Occupational Exposure to Dust Produced when Milling Thermally Modified Wood

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

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