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Title Influence of heat treatment of wood on chip size during milling Author info Martin Kučerka, Alena Očkajová, Richard Kminiak Author Kučerka Martin 1980- (34%) UMBFP07 - Katedra techniky a technológií
Co-authors Očkajová Alena 1961- (33%) UMBFP07 - Katedra techniky a technológií
Kminiak Richard (33%)
Source document Trieskové a beztrieskové obrábanie dreva : vedecký časopis. Č. 13 (2022), s. 161-168. - Zvolen : Technická univerzita vo Zvolene, 2022 ; Trieskové a beztrieskové obrábanie dreva medzinárodná vedecká konferencia Keywords termodrevo frézovanie - milling drevný prach Form. Descr. články - journal articles Language English Country Slovak Republic Annotation The aim of the paper is to determine and compare the particle size analysis of chips resulting from the milling process of natural and heat-treated oak and spruce wood at different temperatures (160 °C, 180 °C, 200 °C and 220 °C). The individual percentages were divided according to the mesh size of the sieves into a coarse fraction using a mesh size of 2 mm and 1 mm, a medium coarse fraction with a mesh size of 0.5 mm and 0.250 mm and a fine fraction with a mesh size of 0.125 mm; 0.08 mm; 0.063 mm; 0.032 mm and the bottom of the screening machine, depending on the type of wood and the treatment temperature. When milling oak, the highest proportion of fine particles was recorded at a treatment temperature of 220 °C - 13.18 %. In this way, we can state that the milling showed the effect of a decrease in the mechanical properties of wood with increasing treatment temperature, which is more brittle. The percentage of the finest particles in spruce wood increases with increasing treatment temperature, from 0.53 % in the milling of natural wood to 11.29 % in the milling of heat-treated wood at 220 °C. URL Link na zdrojový dokument Public work category AFD No. of Archival Copy 52022 Catal.org. BB301 - Univerzitná knižnica Univerzity Mateja Bela v Banskej Bystrici Database xpca - PUBLIKAČNÁ ČINNOSŤ 
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Title Sustainable manufacturing process in wood machining Author info Alena Očkajová, Martin Kučerka, Adrián Banski Author Očkajová Alena 1961- (34%) UMBFP07 - Katedra techniky a technológií
Co-authors Kučerka Martin 1980- (33%) UMBFP07 - Katedra techniky a technológií
Banski Adrián (33%)
Source document Trieskové a beztrieskové obrábanie dreva : vedecký časopis. Č. 13 (2022), s. 75-80. - Zvolen : Technická univerzita vo Zvolene, 2022 ; Trieskové a beztrieskové obrábanie dreva medzinárodná vedecká konferencia Keywords udržateľnosť - sustainability výrobné procesy - manufacturing processes pílenie pílové kotúče prachové častice Form. Descr. články - journal articles Language English Country Slovak Republic Annotation The aim of this paper is to point out the importance of sustainability also in production processes. For the process of longitudinal sawing of beech, beech with a healthy false heart and spruce, we characterized the most important inputs and outputs of the given process based on the scheme from the viewpoint of sustainability. The aim of our investigation was the use of 2 different saw blades SB1 and SB2 and their effect on the granularity of sawdust from the viewpoint of dust particles ≤ 100 μm, which are dangerous for the operating personnel, because dust from hardwoods in particular is included among carcinogens. The proportion of individual sawdust fractions was obtained by sieve analysis. When sawing with the SB2 disc, 56.76 % ÷ 76.0 9% of dust particles ≤ 100 μm are produced compared to SB1 within the selected variants. When comparing woods, the proportion of dust particles ≤ 100 μm for spruce for all variants ranged from 7.95 ÷ 15.09 %, for beech from 10.52 ÷ 24.03 %, which is quite a high percentage, since it is a carcinogen. By choosing the right tool, we can reduce the share of the dust particles ≤ 100 μm, which is dangerous for the working environment. URL Link na zdrojový dokument Public work category AFD No. of Archival Copy 52021 Catal.org. BB301 - Univerzitná knižnica Univerzity Mateja Bela v Banskej Bystrici Database xpca - PUBLIKAČNÁ ČINNOSŤ article