20.500.12556/DKUM-36487 VPLIV TEMPERATURE NA TEHNOLOŠKI POSTOPEK ODLIVANJA SKOZNJIKOV IZ EPOKSIDNE SMOLE THE INFLUENCE OF TEMPERATURE ON TECHONOLOGICAL PROCESS OF BUSHING INSULATORS MADE FROM EPOXY RESINE V diplomskem delu opisujemo eksperimentalni postopek določanja optimalnih procesnih pogojev odlivanja skoznjikov iz epoksidne smole. Najpomembnejši parameter v postopkih želiranja, utrjevanja in ohlajanja skoznjikov je temperatura, ki vpliva na skrčke livne mase in raztezke vgradnih komponent. Omenjene postopke smo preučevali pri različnih temperaturah (90, 120 in 140) °C. Izmerili smo tudi temperaturo eksotermne reakcije pri utrjevanju livne mase in prikazali teoretični izračun raztezkov vgradnih komponent pri tej temperaturi. Z grafičnim prikazom skrčkov livne mase in raztezkov vgradnih komponent pri posamezni temperaturi, smo prikazali krivulje gibanja omenjenih materialov. Ugotovili smo, da to gibanje poteka v različnih smereh (livna masa se krči, vgradne komponente se raztezajo). Z višanjem temperature je razhajanje večje. Za povečanje elastičnosti livne mase in s tem zmanjšanja možnosti nastanka razpok, smo v livno maso dodali fleksibilizator. Pri izbiri pravilne procesne temperature smo upoštevali tudi temperaturo steklastega prehoda, ki je pomembna pri procesu utrjevanja. Tako smo določili optimalne procesne pogoje za odlivanje skoznjikov in drugih izolatorjev iz epoksidne smole z vgrajenimi kovinskimi komponentami in jih uspešno prenesli v proizvodni proces. The graduation thesis presents the experimental procedure to determine optimal process conditions for casting epoxy resin bushings. The most important parameter for gelling, curing and cooling the bushings is temperature, which affects the shrinkage of casting resin and the elongation of built-in components. The above processes have been examined at different temperatures (90, 120 and 140) °C. The temperature of exothermic reaction in the curing of casting resin has been measured, and a theoretical calculation of built-in components elongation at such temperature is provided. Graphic presentations of casting resin shrinkage and built-in components elongation at different temperatures indicate that the above materials move in different directions (casting resin shrinks, while built-in components grow longer). Such discrepancy further increases with the rise of temperature. In order to make casting resin more elastic and reduce the possible occurrence of cracks, flexibilizer was added into the casting resin system. The selection of the right process temperature took account of the glass transition temperature which is important for curing. Thus, optimal process conditions for casting bushings and other epoxy resin insulators with built-in components were determined and successfully transposed in the production process. skoznjiki epoksidna smola livna masa vgradne komponente bushings epoxy resin casting resin system built-in components true true false [V. Tobias Osojnik] Slovenski jezik Angleški jezik Diplomsko delo 2012-06-10 19:26:59 2012-06-21 13:42:28 2022-04-20 08:46:38 2021-04-15 03:39:40 2012 0 Maribor 0 0000-00-00 NiDoloceno NiDoloceno NiDoloceno 0000-00-00 0000-00-00 0000-00-00 543.632.542(043.2) 16697878 URN:SI:UM:DK:MUBHKS2P VS_Tobias_Osojnik_Valerija_2012.pdf VS_Tobias_Osojnik_Valerija_2012.pdf 1 DA4C800AFC612BCDE526917EBE10D4A4 920c89a4a707ead6c6d72d04a63c82a921b1e69807401187e70f0ecf1703bd51 0f894083-7c08-11eb-bb7a-00155d0001ca 20.500.12556/dkum/c83ce143-92f3-4df5-a75b-11499865cdae https://dk.um.si/Dokument.php?lang=slv&id=47596 Fakulteta za kemijo in kemijsko tehnologijo 0 0 0