Influence of drying mode and feed per tooth rate on the fine dust creation in pine and beech sawing on a mini sash gang saw

Rogoziński, Tomasz; Chuchała, Daniel; Pędzik, Marta; Orłowski, Kazimierz A.; Dzurenda, Ladislav; Muzinski, T

doi:10.1007/s00107-020-01608-8

Cited by 13 publications

(4 citation statements)

References 21 publications

(16 reference statements)

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“…Dust particle size analyses of beech wood studied by Rogoziński et al 2021 [ 26 ] showed that sawing beech wood dried with a mixture of warm air and steam at 105 °C results in an increase in the content of fine dust particles compared to air-dried wood, especially at low feed rate. Admittedly, this is not thermally treated but dried wood; however, the cited previous study points out a similar relationship to the results described in this work regarding wood species and feed speed [ 26 ].…”

Section: Resultsmentioning

confidence: 99%

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Effect of Low-Thermal Treatment on the Particle Size Distribution in Wood Dust after Milling

et al. 2023

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The thermal treatment of wood can improve the appearance of the wood product’s surface, its dimensional stability, and resistance to fungal attacks. However, the heat treatment changes the technological properties of wood, making it a new engineering material. This work investigates the effect of the low-thermal treatment of birch wood (Betula pendula Roth.), European beech wood (Fagus sylvatica L.), and alder wood (Alnus glutinosa L.) on the fine dust particles creation during woodworking. The samples of thermally treated wood with temperatures commonly used for the change of wood colour (105, 125, and 135 °C) were compared with reference samples made of natural wood. All 12 variants of the tested woods were milled using the 5-axis CNC machining center (20 mm diamond cutter, rotational speed 18,000 rev·min−1, the depth of cut 3 mm, feed rates of 2, 4 and 6 m∙min−1). A sieving analysis method allowed measuring the dust particle size distributions in all dust samples. The experiment’s result analysis points out that wood type, thermal treatment, and feed rate meaningfully affect the size distribution of dust particles. Compared to birch wood and beech wood, the milling of alder wood samples created a much higher content of the finest dust particles, with particle sizes smaller than 0.032 mm. Increased temperatures in thermal treatment increase the share of fine dust particles with sizes smaller than 0.125 mm, compared to wood in its natural state. Milling with a lower feed rate (2 m·min−1) creates finer dust than processing with higher feed rates (4 and 6 m·min−1). Generally, the milling of alder in a natural or thermally treated state is a source of fine dust particles, particularly at low feed speed-rate milling, compared to birch and beech wood. In general, these results indicate that the low temperature thermal treatment parameters attribute new technological properties to all thermally modified types of wood tested.

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Section: Resultsmentioning

confidence: 99%

“…Wood dust consists of small wood chips. The wood chips’ size depends mainly on the machining process, including the state of the tool cutting edges and the cutting process’s technical conditions and technological parameters [ 24 , 25 , 26 ]. The finest particles’ content also depends on the processed wood material [ 27 ].…”

Section: Introductionmentioning

confidence: 99%

Effect of Low-Thermal Treatment on the Particle Size Distribution in Wood Dust after Milling

et al. 2023

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“…The laser diffraction method overestimates the results of the particle size measurement of wood dust due to the non-spherical shape of particles. Long and thin particles can be recognized as spheres with a diameter equal to the particle length [61,71]. Therefore, in order to avoid this error, many complementary measuring methods should be used.…”

Section: Resultsmentioning

confidence: 99%

Fine Dust Creation during Hardwood Machine Sanding

et al. 2021

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Wood dust generated during woodworking—particularly from hardwood species during sanding—poses a health and safety hazard to workers in the wood industry. This study aimed to determine the particle-size distribution of selected hardwood species and the content of fine particles in dust created during machine sanding, which pose the highest health and safety hazards in the woodworking industry. Six hardwood species were studied: black alder, European ash, common walnut, pedunculate oak, hornbeam, and European beech. The sieve analysis method was used to determine the particle-size distribution and article mean arithmetic particle diameter, and laser diffraction analysis was used to determine the finest particle content. Two size ranges were assumed: <2.5 μm and <10 μm. Beech dust had the smallest mean particle diameter. Dust from wood species used in the test had similar contents of fine fractions of particles. The average content of particles smaller than 2.5 µm in wood dust from the tested hardwood species did not exceed 1.9%. In terms of occupational exposure to wood dust, machine sanding conditions of hardwoods should be properly adjusted to limit the formation of large amounts of dust.

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“…Color changes were more noticeable in sapwood than in red heartwood, and measurements corroborated this observation In [12], where the combination of hot-air drying and high-temperature drying of birch timber was used, the color change of wood during the high-temperature drying of birch timber could be effectively reduced using hot-air drying during the early phase of the drying process. Drying conditions and methods can affect the intensity of color change [13], but so can conditions during the cutting process, such as cutting forces [14,15] sawdust granularity [16,17], and physical properties [18][19][20].…”

Section: Introductionmentioning

confidence: 99%

The Influence of Drying Temperature on Color Change of Hornbeam and Maple Wood Used as Surface and Inner Layers of Wood Composites

et al. 2021

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The thermal treatment of wood changes its structure due to the degradation of wood polymers (cellulose, hemicellulose and lignin), so the physical properties of wood are either improved or degraded. Color changes apply not only to natural wood, but also to such wood composites for which some amount of glue is used in their construction (e.g., plywood, blockboard or laminboard). This article is focused on the analysis of hornbeam and field maple wood color changes influenced by drying temperature. Two types of drying modes were used: hot-air mode where the temperature of the drying environment was 60 °C, and high-temperature mode with a drying temperature of 120 °C. The drying mode was divided into two phases depending on the moisture content of the wood. The compared woods had similar values of color coordinates at the beginning of drying. During hot-air drying, the largest changes in color coordinates occurred during the first 24 h. The total color difference between the color at the end and the beginning of drying was 7.3 for hornbeam and 11.1 for maple. The overall color difference between the compared woods was minimal. During high-temperature drying (120 °C), the color changes of the dried woods were more pronounced. In the case of maple wood, there was a very significant change in color and the value of ΔE* was twice as high as for hornbeam. The total color difference between the color at the end and at the beginning of drying was 8.7 for hornbeam and 18.9 for maple.

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Influence of drying mode and feed per tooth rate on the fine dust creation in pine and beech sawing on a mini sash gang saw

Cited by 13 publications

References 21 publications

Effect of Low-Thermal Treatment on the Particle Size Distribution in Wood Dust after Milling

Effect of Low-Thermal Treatment on the Particle Size Distribution in Wood Dust after Milling

Fine Dust Creation during Hardwood Machine Sanding

The Influence of Drying Temperature on Color Change of Hornbeam and Maple Wood Used as Surface and Inner Layers of Wood Composites

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