Mfundo yopangira jekeseni wa nkhungu ya simenti ya carbide Mu nkhunguyo muli mbowo yodyetsera, yomwe imalumikizidwa ndi nkhungu yotsekedwa ndi jekeseni kudzera mu njira yolowera mkati. Mukamagwira ntchito, muyenera kuyika kaye zinthu zolimba zomangira m'malo odyetsera ndikuwotcha kuti zisinthe kukhala mawonekedwe a viscous. Kenako gwiritsani ntchito plunger yapadera kukakamiza pulasitiki kusungunula m'bowo la chakudya muzosindikiza, kuti sungunulolo lidutse mu nkhungu. The kuthira dongosolo amalowa chatsekedwa nkhungu patsekeke ndi kuchita otaya kudzaza. Pamene kusungunula kudzaza nkhungu, ndipo pambuyo pa kukakamiza koyenera ndi kulimbitsa, nkhungu imatha kutsegulidwa kuti ichotse mankhwala. Pakadali pano, kuumba jekeseni kumagwiritsidwa ntchito kwambiri pazinthu zapulasitiki za thermoset.
Poyerekeza ndi psinjika akamaumba, simenti carbide nkhungu jekeseni akamaumba ali pulasitiki pulasitiki asanalowe patsekeke, kotero mkombero akamaumba ndi lalifupi, dzuwa kupanga ndi mkulu, mbali pulasitiki ndi mkulu dimensional molondola, zabwino pamwamba khalidwe, ndipo palibe kung'anima. Woonda kwambiri; amatha kuumba zigawo za pulasitiki ndi zoyikapo zing'onozing'ono, mabowo akuya akuya ndi zigawo zapulasitiki zovuta; amadya kwambiri zopangira; shrinkage mlingo wa jekeseni akamaumba ndi waukulu kuposa shrinkage mlingo wa psinjika akamaumba, zomwe zingakhudze kulondola kwa mbali za pulasitiki, koma ufa Mbali za pulasitiki zodzazidwa ndi mawonekedwe fillers alibe zotsatira; kamangidwe ka simenti carbide jekeseni nkhungu ndi zovuta kwambiri kuposa psinjika nkhungu, akamaumba kuthamanga ndi apamwamba, ndi akamaumba ntchito yovuta kwambiri. Jekeseni akamaumba ntchito kokha pamene psinjika akamaumba sangathe kukwaniritsa zofunika kupanga. Jekeseni akamaumba ndi oyenera akamaumba mbali thermosetting pulasitiki akalumikidzidwa ndi amaika ambiri.
Waukulu ndondomeko magawo cemented carbide nkhungu jekeseni akamaumba ngati akamaumba kuthamanga, akamaumba kutentha ndi akamaumba mkombero, etc. Iwo onse okhudzana ndi zinthu monga pulasitiki mtundu, kapangidwe nkhungu, ndi zinthu mankhwala.
(1) Kukakamiza kuumba kumatanthauza kukakamizidwa ndi atolankhani pa kusungunula m'chipinda chodyera kudzera pamzere wokakamiza kapena plunger. Popeza pali kupsinjika kwamphamvu pamene kusungunula kumadutsa pazitseko, kukakamiza kowumbidwa panthawi ya jekeseni wamagetsi nthawi zambiri kumakhala 2 mpaka 3 kuposa pakumangirira. Kuponderezedwa kwa pulasitiki ya phenolic ufa ndi amino pulasitiki ufa nthawi zambiri ndi 50 ~ 80MPa, ndipo kuthamanga kwapamwamba kumatha kufika 100 ~ 200MPa; mapulasitiki okhala ndi fiber filler ndi 80 ~ 160MPa; mapulasitiki opaka otsika kwambiri monga epoxy resin ndi silikoni ndi 2 ~ 10MPa.
(2) Kutentha kwapangidwe kwa nkhungu ya simenti ya carbide kumaphatikizapo kutentha kwa zinthu zomwe zili m'chipinda chodyera ndi kutentha kwa nkhungu yokha. Pofuna kuonetsetsa kuti zinthuzo zili ndi madzi abwino, kutentha kwa zinthu kuyenera kukhala kochepa kwambiri kusiyana ndi kutentha kwapakati pa 10 ~ 20 ° C. Popeza pulasitiki imatha kupeza gawo la kutentha kwachitsulo pamene ikudutsa muzitsulo zothira, kutentha kwa chipinda chodyera ndi nkhungu kungakhale kochepa. Kutentha kwa nkhungu kuumba jekeseni nthawi zambiri kumakhala 15 ~ 30 ℃ kutsika kuposa kupangira psinjika, nthawi zambiri 130 ~ 190 ℃.
(3) Kuzungulira kwa jekeseni wa nkhungu zomangika za carbide kumaphatikizapo nthawi yodyetsa, nthawi yodzaza nkhungu, nthawi yolumikizirana ndi kuchiritsa, nthawi yochotsa ziwalo zapulasitiki, ndi nthawi yochotsa nkhungu. Nthawi yodzaza jekeseni nthawi zambiri imakhala 5 mpaka 50 masekondi, pamene nthawi yochiritsa imadalira mtundu wa pulasitiki, kukula kwake, mawonekedwe, makulidwe a khoma, kutentha kwa preheating ndi mawonekedwe a nkhungu ya gawo la pulasitiki, ndipo nthawi zambiri amakhala 30 mpaka 180 masekondi. Kupanga jekeseni kumafuna kuti pulasitiki ikhale ndi madzi ambiri asanafike kutentha kowumitsa, ndipo ikafika kutentha kowumitsa, iyenera kukhala ndi liwiro lolimba kwambiri. Zomwe zimagwiritsidwa ntchito popanga jekeseni zimaphatikizapo: mapulasitiki a phenolic, melamine, epoxy resin ndi mapulasitiki ena.
Nthawi yotumiza: Sep-18-2024
