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Krivljenje enostransko profiliranih MDF plošč : diplomsko delo (visokošolski strokovni študij) = Warping of one side planed MDF boards : graduation thesis (higher professional studies)Starman, KlemenLetve in ostali elementi, izdelani iz MDF plošč, se v procesu nadaljne obdelave deformirajo oz. ukrivijo. Namen diplomske naloge je bil poiskati vzroke za krivljenje. Za izvedbo poizkusov smo ... uporabili preizkušance iz MDF plošč, nazivne debeline 25 mm. Polovico preizkušancev smo skobljali obojestransko, drugo polovico pa enostransko. Med potekom testiranja smo merili vpliv posameznih operacij na krivljenje preizkušancev. Izmerili smo dimenzijsko obstojnost dekorativnega laminata ob spremembi temperature in vertikalno porazdelitev prostorninskih mas za različno skobljanje preizkušance. Meritve so pokazale, da se preizkušanci ukrivijo takoj, ko jih poskobljamo ali oplemenitimo z dekorativnim laminatom. Pri tem smo ugotovili, da je velikost ukrivljenosti odvisna tudi od globine skobljanja, saj so se neskobljeni preizkušanci ukrivili minimalno. Z meritvami vertikalne porazdelitve prostorninskih mas smo potrdili domnevo, da je zaradi enostranskega skobljanja nastala asimetrija, kar je vplivalo na krivljenje. Pri meritvah dimenzijske obstojnosti dekorativnega laminata pa smo opazili, dase le-ta zaradi izpostavitve visoki temperaturi skrči, vendar pride po klimatiziranju do skoraj popolnega raztezka. Sklepamo, da ima dekorativni laminat vpliv samo na začasno, na trajno ukrivljenost pa je skoraj nima. Ugotovili smo, da enostransko skobljanje povzroči asimetričnost MDF plošče po prerezu, posledica tega pa je njeno krivljenje. Krivljenje je odvisno tudi od debeline odvzetega materiala, saj z večanjem odvzema narašča simetričnost in s tem velikost ukrivljenosti. Da bi se v prihodnje izognili krivljenju pri izdelkih, izdelanih iz MDF plošč, priporočamo izogibanje večjim globinam skobljanja in obojestransko skobljanje.Type of material - undergraduate thesis ; adult, seriousPublication and manufacture - Ljubljana : [K. Starman], 2002Language - slovenianCOBISS.SI-ID - 839049
Author
Starman, Klemen
Other authors
Medved, Sergej |
Resnik, Jože, 1942-
Topics
MDF |
krivljenje |
asimetrija |
vertikalna porazdelitev prostorninskih mas |
MDF |
warping |
asymmetry |
vertical density distribution
Library/institution |
City | Acronym | For loan | Other holdings |
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BF, Department of Wood Science and Technology, Lj. | Ljubljana | BFLES |
reading room 1 cop.
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Database name | Field | Year |
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Links to authors' personal bibliographies | Links to information on researchers in the SICRIS system |
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Medved, Sergej | 15410 |
Resnik, Jože, 1942- | 06324 |
Source: Personal bibliographies
and: SICRIS
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