Mu njira zotulutsira pulasitiki — kaya kupanga mapaipi, ma profiles, ma pellets, kapena zokutira chingwe — kukwaniritsa khalidwe logwirizana la chinthu kumafuna zambiri osati kutentha koyenera ndi kapangidwe ka zomangira. Chinthu chimodzi chomwe nthawi zambiri chimanyalanyazidwa koma chofunikira kwambiri ndi pampu ya vacuum.
Pa nthawi yotulutsa mpweya, zipangizo zopangira pulasitiki zimatenthedwa mpaka zitasungunuka. Njirayi imatulutsa chinyezi, mpweya wotsekeredwa, ma monomers, ma oligomers, ndi zinthu zina zosinthasintha. Ngati mpweya uwu ukhalabe mu kusungunuka, umapanga thovu, zolakwika pamwamba (nthawi zambiri zimatchedwa "silver streaks"), ndi ma voids amkati. Zotsatira zake zimakhala chinthu chofooka, chosawoneka bwino chomwe chimalephera miyezo yabwino. Pampu ya vacuum imathetsa izi mwa kupanga kupanikizika koyipa m'dera lochotsa mpweya wa extruder, ndikuchotsa mosalekeza zinthu zosokoneza ndikuwonetsetsa kuti kusungunuka kofanana.
Komabe, mpweya wotuluka m'madzi suli woyera kwenikweni. Nthawi zambiri umakhala ndi fumbi la pulasitiki, tinthu ta kaboni towonongeka, mafuta oundana, komanso zotsalira zomata kuchokera ku kutentha. Ngati zinthu zodetsedwazi zikokedwa mwachindunji mu pampu ya vacuum, zotsatira zake zimakhala zoopsa kwambiri. Mapampu a rotary vane amavutika ndi makina amafuta otsekeka komanso ma vane ogwidwa. Mapampu owuma okhala ndi zomangira amawonongeka ndi kuwonongeka kwa rotor. Mulimonsemo, magwiridwe antchito a pampu amawonongeka mwachangu, nthawi zambiri mkati mwa milungu kapena masiku.
Apa ndi pomwe pampu ya vacuum yapamwamba kwambirifyulutaimakhala yofunika kwambiri. Ikayikidwa pakati pa chotulutsira mpweya ndi pampu, fyulutayo imagwira tinthu tolimba ndi ma aerosol asanayambe kuwonongeka mkati. Dongosolo losefera lopangidwa bwino limateteza ziwalo zoyenda za pampu, limasunga kuchuluka kwa vacuum kokhazikika, komanso limawonjezera nthawi ya ntchito.
Kwa ogwiritsa ntchito chingwe chotulutsira madzi, chisankhocho ndi chosavuta: gwiritsani ntchito chingwecho mosadziteteza ndipo nthawi zambiri pampu imalephera kugwira ntchito, kapena yika ndalama mukusefa koyenerandipo amasangalala ndi kupanga kodalirika komanso kosalekeza. Fyulutayo imadula pang'ono poyerekeza ndi pampu yomwe imateteza — komabe imapanga kusiyana kwakukulu pakati pa mzere womwe umavutika ndi womwe umagwira ntchito bwino. Kupatula apo, kutulutsa kodalirika kumayamba ndi vacuum yoyera.
Nthawi yotumizira: Meyi-05-2026
