20.500.12556/RUL-177 Vpliv gostotnega profila in sorpcijskih karakteristik na krivljenje MDF plošč diplomsko delo (visokošolski strokovni študij) Influence of vertical density profile and sorption characteristics on warp in medium density fibreboard graduation thesis (higher professional studies) Ugotavljali smo kako in v kolikšni meri vplivajo na krivljenje plošč vlažnostni profil, gostotni profil, dimenzijska stabilnost in mehanske lastnosti posameznih slojev, če z enostranskim odvzemom materiala porušimo simetrijo plošče. MDF ploščo debeline 30mm smo testirali kot celoto ter po posameznih slojih; v ta namen smo jo na tračni žagi razrezali na 5 enako debelih slojev. Ugotovili smo, da vse testirane lastnosti variirajo po debelini plošče. Gostota zunanjih slojev je višja od gostote v srednjem, vlažnost na površini plošče nižja kot v sredini, mehanske lastnosti v zunanjih slojih pa znatno boljše od lastnosti srednjega. Ugotovili smo močno korelacijo med vsemi testiranimi lastnostmi; iz tega lahko sklepamo, da le-te vzajemno vplivajo na krivljenje, v kolikor porušimo simetrijo plošče. The influences of moisture content profile, density profile, dimensional stability and mechanical properties of individual layers in MDF board were defined, if the symmetry of the board was ruined due to one-sided cutting. 30mm MDF board was used and tested as a whole board, as well as sawn into 5 equally thick layers. It was found out that all the tested parameters vary along the board thickness. The density of the outer layers of the board is higher than that in its core, humidity of the outer layers lower than in its core, and the mechanical properties of the outer layers significantly better than those of the core. A strong correlation among all the tested properties was established. As regard that correlation it is safe to say that bending of the board is a consequence of all the tested parameters combined, if the symmetry of the board is ruined due to one-sided cutting. MDF plošča porazdelitev gostote porazdelitev vlažnosti dimenzijska stabilnost natezna trdnost MDF board density distribution moisture distribution dimensional stability tensile strength true false false [J.Benedičič] Slovenski jezik Angleški jezik Diplomsko delo 2014-07-11 12:24:28 2014-07-11 12:24:28 2022-07-11 10:08:31 0000-00-00 00:00:00 2007 0 Ljubljana 0 XI, 34 f., 10 f. pril.] 0000-00-00 NiDoloceno NiDoloceno NiDoloceno 0000-00-00 0000-00-00 0000-00-00 630*862.3 1477513 vs_benedicic_janez.pdf vs_benedicic_janez.pdf 1 06DBBF86C6D9C34A5C49387B0FA25E6C ca3be28622a3085215c78368fae336a80db529e4cb58cf7be310079ea19f1d85 574f3e49-a1b9-11eb-a523-00155dcfd717 20.500.12556/rul/fa952bf3-cc8c-475d-bdd6-5aa7dab6c131 https://repozitorij.uni-lj.si/Dokument.php?lang=slv&id=132218 Biotehniška fakulteta 0 0 0