Kuponyera vacuum kuli ndi mayina ena ambiri monga vacuum sealed casting, kuponyera mchenga kolakwika,V ntchito yopangandi V kuponya, chifukwa cha kukakamizidwa koyipa komwe kumagwiritsidwa ntchito popanga nkhungu yoponya. Ndikofunikira kwambiri kufufuza njira zoponyera pakhoma laling'ono kwambirifzolakwika zoponyera zitsulochifukwa njirazi zimathandiza kuchepetsa kugwiritsa ntchito mphamvu, kupulumutsa zipangizo ndi kuchepetsa kulemera kwa makina. Kuti akwaniritse zolingazi, njira zambiri zoponyera zida zapangidwa. Njira yomangira yotsekedwa ndi vacuum, V-process mwachidule, imagwiritsidwa ntchito kwambiri popanga chitsulo ndi chitsulo chokhala ndi khoma lochepa thupi, kulondola kwambiri komanso kusalala. Komabe, njira yoponya vacuum singagwiritsidwe ntchito kuthira zitsulo castingsndi makulidwe ang'onoang'ono a khoma, chifukwa zitsulo zamadzimadzi zomwe zimadzaza mu nkhungu zimadalira mutu wokhazikika wa V-process. Komanso, ndondomeko sangathe kutulutsa castings kuti amafuna mkulu kwambiri dimension kulondola chifukwa choletsedwa compressive mphamvu nkhungu.
Pofuna kupititsa patsogolo luso lodzaza zitsulo zamadzimadzi zosungunula ndikuwonjezera mphamvu ya nkhungu, tapanga njira yatsopano yoponyera yomwe imatchedwa vacuum-sealed mold casting. Ngakhale kuti kuponyedwa kumeneku kumachokera ku V-process, ndi yosiyana chifukwa panthawiyi zitsulo zamadzimadzi zimadzaza ndi kulimba mu nkhungu yosindikizidwa ndi vacuum pansi pa kuthamanga kwakukulu. Pogwiritsa ntchito njirayi, zitsulo zopangidwa ndi zitsulo zokhala ndi makoma owonda, osalala pamwamba ndi miyeso yolondola zapangidwa bwino.
Chikombolecho chinagwiritsa ntchito chatsopanochindondomeko ya vacuumndizofanana ndi zomwe zimagwiritsidwa ntchito pa V-process wamba. Pambuyo popanga nkhungu, imayikidwa m'chotengera. Pochotsa mpweya kudzera mutopi yotopetsa, mlingo wa vacuum mu nkhungu ukhoza kusungidwa pamtengo wokhazikika. Chitsulo chamadzimadzi chimatsanuliridwa mu ladle mkati mwa chotengera. Ndiye chotengeracho chimasindikizidwa; ndipo kuthamanga kwa mpweya m'chombo kumawonjezeka kufika pamtengo wosankhidwa mwa kupopera mpweya kudzera mumsewu. Pambuyo pake, zitsulo zamadzimadzi zimatsanuliridwa mu nkhungu potembenuza mkono wa rocker. Panthawi yodzaza ndi kulimbitsa, mpweya mkati mwa nkhungu umatuluka mosalekeza kudzera m'mapaipi ndipo nkhunguyo imasungidwa pamalo opanda kanthu. Pambuyo pake, zitsulo zamadzimadzi zimadzaza ndi kulimba pansi pa kuthamanga kwakukulu.
Nthawi zambiri, nkhungu imatha kupangidwa ndikusungidwa kuti isagwe pomwe kuthamanga kwapakati kupitilira 50 kPa. Ntchito ya chinsalu chotsegulira cholumikizira nkhungu ndi chakale ndikulimbikitsa zitsulo zamadzimadzi zomwe zimalowa mu nkhungu pokoka mpweya kapena mpweya kuchokera ku nkhungu kudutsa mchenga wouma mu nkhungu. Pakakhala chotchinga choterechi, kupanikizika kumachepa pakuthira; koma ndipamwamba kwambiri kuposa 150 kPa, yokulirapo kwambiri kuposa 50 kPa. Chifukwa chake, chophimba chotsegulira sichimawononga ntchito ya filimu yapulasitiki pa nkhungu ya cope.
Choncho PV ndondomeko angagwiritsidwe ntchito kupanga woonda khoma kuponyedwa chitsulo castings ndizida zachitsulomwatsatanetsatane kwambiri. Pochita kupanga popanga njira zina zomwe zimagwiritsidwa ntchito nthawi zambiri zimagwiritsidwa ntchito popititsa patsogolo kudzaza kwachitsulo chamadzimadzi, kuphatikiza kukweza mutu wachitsulo chamadzimadzi, kuonjezera kutentha kwa nkhungu ndikuwonjezera kudzaza. Kuchepetsa kupanikizika m'mitsempha yakale ndi njira yabwino yowonjezerera kudzaza.
Mphamvu yopondereza ya nkhungu mu mtundu watsopano wa vacuum kuponyera imachokera ku kusiyana kwapakati ndi kunja kwa nkhungu. Kuchulukirachulukira kwa kusiyana kwa kuthamanga, kukangana kwakukulu pakati pa njere zamchenga, ndizovuta kwambiri kuyenda kwa mchenga kutsutsana wina ndi mzake, zomwe zimapangitsa kuti nkhungu ikhale yolimba kwambiri. Kuphatikizika kwakukulu kumapindulitsa popanga ma castings olondola kwambiri komanso zolakwika zochepa kapena zopanda kuponyera.
Ngakhale njira monga kuchulukitsa zomangira zomangira, kuphika nkhungu zobiriwira ndikugwiritsa ntchito mchenga womata utomoni zitha kupititsa patsogolo mphamvu ya nkhungu, zidzakulitsanso mtengo wopangira kwambiri. Pansi kutentha filimu pulasitiki pamwamba pa nkhungu patsekeke Chimafewetsa ndi kusungunula, ndiye filimu amasanduka nthunzi ndi diffuses mu nkhungu mchenga pansi pa zotsatira za kuthamanga kusiyana, ndi m`kati nkhungu amataya airproof mphamvu pang`onopang`ono. Zoterezi zimatchedwa njira yoyaka moto ya filimu ya pulasitiki. Zinthu zambiri zimakhudza kuthamanga kwa moto-kutayika kwa filimu ya pulasitiki, monga mtundu ndi makulidwe a filimu ya pulasitiki, kukula kwa kuponyera, kusiyana pakati pa mkati ndi kunja kwa nkhungu, kutentha kwachitsulo chosungunuka chamadzimadzi komanso ngati pali zokutira. wosanjikiza pa filimu ya pulasitiki. Komabe, pamene nsanjiri yokutira imapopera pa filimuyo, kuthamanga kwa kuwotcha-kutaya kumachepetsa kwambiri ndipo nkhungu imakhala ndi katundu wabwino wotsimikizira mpweya.
Nthawi yotumiza: Jan-24-2021