Kwa zaka zambiri, kupanga ma rabara roller kwapangitsa kuti makina ndi makina oyendetsera zinthu zikhale zovuta chifukwa cha kusakhazikika kwa zinthu komanso kusiyanasiyana kwa kukula kwake. Pakadali pano, ambiri a iwo akadali mizere yopanga mayunitsi yokhazikika yochokera pamanja. Posachedwapa, opanga ena akuluakulu ayamba kupanga mosalekeza kuyambira pa zipangizo za rabara mpaka kupanga ndi kupanga zinthu mozungulira, zomwe zawonjezera kawiri magwiridwe antchito ndikukweza kwambiri malo ogwirira ntchito komanso mphamvu ya ogwira ntchito.
M'zaka zaposachedwapa, ukadaulo wa jakisoni, kutulutsa, ndi kuzunguliza zinthu wakhala ukupangidwa mosalekeza, ndipo zida zopangira rabara ndi vulcanization zapangitsa kuti kupanga rabara ndi raba kukhale kokhazikika komanso kodziyimira pawokha. Kagwiridwe ka ntchito ka rabara kumakhudza kwambiri makina onse, ndipo ndikokhwima kwambiri pa ntchito ndi mtundu wa kupanga. Zambiri mwa zinthu zake zagawidwa m'magulu a zinthu zabwino. Pakati pawo, kusankha zipangizo za rabara ndi pulasitiki ndi kuwongolera kulondola kwa zinthu ndizofunikira kwambiri. Pamwamba pa rabara la rabara sililoledwa kukhala ndi zonyansa, matuza ndi thovu, osatchulanso zipsera, zolakwika, mipata, ming'alu ndi masiponji am'deralo ndi zochitika zosiyanasiyana zofewa ndi zolimba. Pachifukwa ichi, rabara iyenera kukhala yoyera komanso yosamala kwambiri pakupanga konse, kuti igwire ntchito yogwirizana komanso yokhazikika. Njira yophatikiza pulasitiki ya rabara ndi pakati pachitsulo, kuphatika, kupanga jakisoni, vulcanization ndi kugaya yakhala njira yapamwamba kwambiri.
Kukonzekera kwa rabala
Pa ma roller a rabara, kusakaniza kwa rabala ndiye chinthu chofunikira kwambiri. Pali mitundu yoposa 10 ya zipangizo za rabala za ma roller a rabara kuyambira rabala wachilengedwe ndi rabala wopangidwa mpaka zipangizo zapadera. Kuchuluka kwa rabala ndi 25%-85%, ndipo kuuma kwake ndi dothi (0-90) madigiri, komwe kumafalikira mosiyanasiyana. Chifukwa chake, momwe mungasakanizire mankhwala awa mofanana kwakhala vuto lalikulu. Njira yachikhalidwe ndikugwiritsa ntchito mphero yotseguka yosakaniza ndi kukonza mu mawonekedwe a magulu osiyanasiyana a master. M'zaka zaposachedwa, makampani asintha kwambiri kugwiritsa ntchito zosakaniza zamkati kuti akonze mankhwala a rabala pogwiritsa ntchito kusakaniza kogawanika.
Pambuyo poti zinthu za rabara zasakanizidwa bwino, rabala iyenera kusefedwa ndi fyuluta ya rabala kuti ichotse zinyalala mu zinthu za rabala. Kenako gwiritsani ntchito kalendala, chotulutsira, ndi makina opaka kuti mupange filimu kapena mzere wopanda thovu ndi zinyalala zopangira rolara. Musanapange, mafilimu awa ndi zingwe zomatira ziyenera kuyang'aniridwa mosamala kuti zichepetse nthawi yoyimitsa magalimoto, kusunga malo atsopano ndikuletsa kumatirira ndi kusintha kwa extrusion. Popeza ma rolara ambiri a rabala ndi zinthu zosapangidwa, zikangokhala zinyalala ndi thovu pamwamba pa rabala, matuza amatha kuwonekera pamwamba pake akaphwanyidwa pambuyo pa vulcanization, zomwe zimapangitsa kuti rolara yonse ya rabala ikonzedwe kapena kutayidwa.
Nthawi yotumizira: Julayi-07-2021
