Kupanga
Kuumba ma roller a rabara makamaka kumamatira rabala wokutira pakati pa chitsulo, kuphatikizapo njira yokulungira, njira yotulutsira, njira yopangira, njira yopanikizira jakisoni ndi njira yopangira jakisoni. Pakadali pano, zinthu zazikulu zapakhomo ndi zomangira ndi kupanga makina kapena pamanja, ndipo mayiko ambiri akunja apanga makina odzipangira okha. Ma roller a rabala akuluakulu ndi apakatikati amapangidwa makamaka popangira ma profiling extrusion, kupangira mosalekeza ndi filimu yotulutsira kapena kupangira kosalekeza ndi tepi yotulutsira. Nthawi yomweyo, mu ndondomeko yopangira, kufotokozera, miyeso ndi mawonekedwe amawongoleredwa okha ndi microcomputer, ndipo zina zimatha kupangidwanso ndi njira yotulutsira mbali yakumanja ndi kutulutsa mawonekedwe apadera.
Njira yopangira zinthu yomwe yatchulidwa pamwambapa singochepetsa mphamvu ya ntchito yokha, komanso kuchotsa thovu lomwe lingakhalepo. Pofuna kupewa kuti roller ya rabara isawonongeke panthawi yopangira zinthu komanso kuti thovu ndi masiponji zisapangidwe, makamaka pa roller ya rabala yomwe yapangidwa ndi njira yokulunga, njira yosinthasintha yokakamiza iyenera kugwiritsidwa ntchito panja. Nthawi zambiri, pamwamba pa roller ya rabala imakulungidwa ndikukulungidwa ndi nsalu zingapo za thonje kapena nsalu ya nayiloni, kenako imakhazikika ndikukakamizidwa ndi waya wachitsulo kapena chingwe cha ulusi. Ngakhale kuti njirayi yapangidwa kale ndi makina, kuvala kuyenera kuchotsedwa pambuyo pa vulcanization kuti pakhale njira ya "cecal", yomwe imavuta njira yopangira. Kuphatikiza apo, kugwiritsa ntchito nsalu yopangira zinthu ndi chingwe chozungulira ndi kochepa kwambiri ndipo kugwiritsa ntchito kwake ndi kwakukulu.
Pa ma roller ang'onoang'ono ndi ang'onoang'ono a rabara, njira zosiyanasiyana zopangira zingagwiritsidwe ntchito, monga kukonza ndi manja, kuchotsa ma nesting, kukakamiza jakisoni, kulowetsa ndi kuthira. Pofuna kukonza bwino ntchito yopanga, njira zambiri zopangira zikugwiritsidwa ntchito tsopano, ndipo kulondola kwake ndi kwakukulu kwambiri kuposa njira yosapangira. Kupanikizika kwa jakisoni, kulowetsa mphira wolimba ndi kuthira mphira wamadzimadzi kwakhala njira zofunika kwambiri zopangira.
Kuphulika kwa mlengalenga
Pakadali pano, njira yogwiritsira ntchito ma vulcanization a rabara akuluakulu ndi apakatikati ndiyo vulcanization ya thanki ya vulcanization. Ngakhale kuti njira yosinthasintha yogwiritsira ntchito pressurization yasinthidwa, sikuchokabe ku ntchito yolemetsa yonyamula, kunyamula ndi kutsitsa. Gwero la kutentha kwa vulcanization lili ndi njira zitatu zotenthetsera: nthunzi, mpweya wotentha ndi madzi otentha, ndipo njira yayikulu ndi nthunzi. Ma rollers a rabara omwe ali ndi zofunikira zapadera chifukwa cha kukhudzana kwa chitsulo ndi nthunzi ya madzi amagwiritsa ntchito vulcanization ya nthunzi yosalunjika, ndipo nthawiyo idzakulitsidwa ndi nthawi 1 mpaka 2. Nthawi zambiri amagwiritsidwa ntchito pa ma rollers a rabara okhala ndi chitsulo chopanda kanthu. Pa ma rollers apadera a rabara omwe sangasinthidwe ndi thanki ya vulcanization, nthawi zina madzi otentha amagwiritsidwa ntchito pochotsa vulcanization, koma chithandizo cha kuipitsidwa kwa madzi chiyenera kuthetsedwa.
Pofuna kupewa kuti mphira ndi pakati pa chitsulo zisachotsedwe chifukwa cha kusiyana kosiyana kwa kutentha pakati pa chopukutira cha rabara ndi pakati pa rabara, chopukutira nthawi zambiri chimagwiritsa ntchito njira yotenthetsera pang'onopang'ono komanso yowonjezera mphamvu, ndipo nthawi yopukutira imakhala yayitali kwambiri kuposa nthawi yopukutira yomwe imafunika ndi mphira yokha. . Kuti chipukutiro chikhale chofanana mkati ndi kunja, komanso kuti kutentha kwa pakati pa chitsulo ndi mphira kufanane, chopukutira chachikulu cha rabara chimakhala mu thanki kwa maola 24 mpaka 48, zomwe ndi pafupifupi nthawi 30 mpaka 50 kuposa nthawi yodziwika bwino ya chopukutira cha rabara.
Ma roller ang'onoang'ono ndi ang'onoang'ono a rabara tsopano asinthidwa kukhala plate vulcanizing press molding vulcanization, zomwe zasintha kwathunthu njira yachikhalidwe ya vulcanization ya ma roller a rabara. M'zaka zaposachedwa, makina opangira jakisoni akhala akugwiritsidwa ntchito kukhazikitsa ma mold ndi vacuum vulcanization, ndipo ma mold amatha kutsegulidwa ndikutsekedwa okha. Mlingo wa makina ndi automation wakula kwambiri, ndipo nthawi ya vulcanization ndi yochepa, magwiridwe antchito opanga ndi apamwamba, ndipo mtundu wa malonda ndi wabwino. Makamaka pogwiritsa ntchito makina opangira jakisoni a rabara, njira ziwiri zopangira ndi vulcanization zimaphatikizidwa kukhala chimodzi, ndipo nthawi imatha kufupikitsidwa kukhala mphindi 2 mpaka 4, zomwe zakhala njira yofunika kwambiri pakukula kwa kupanga ma roller a rabara.
Pakadali pano, rabara yamadzimadzi yomwe imayimiridwa ndi polyurethane elastomer (PUR) yakula mofulumira popanga ma roller a rabara, ndipo yatsegula njira yatsopano yopangira zinthu ndi njira. Imagwiritsa ntchito njira yothira kuti ichotse ntchito zovuta zoumba ndi zida zazikulu zovulcanization, zomwe zimapangitsa kuti njira yopangira ma roller a rabara ikhale yosavuta. Komabe, vuto lalikulu ndilakuti nkhungu ziyenera kugwiritsidwa ntchito. Pa ma roller akuluakulu a rabara, makamaka pazinthu zosiyanasiyana, mtengo wopangira umakwera kwambiri, zomwe zimabweretsa zovuta zazikulu pakukweza ndi kugwiritsa ntchito.
Pofuna kuthetsa vutoli, njira yatsopano yopangira rabara ya PUR popanda kupanga nkhungu yawonekera m'zaka zaposachedwa. Imagwiritsa ntchito polyoxypropylene ether polyol (TDIOL), polytetrahydrofuran ether polyol (PIMG) ndi diphenylmethane diisocyanate (MDl) ngati zopangira. Imachitapo kanthu mwachangu ikasakaniza ndikusakaniza, ndipo imathiridwa mochuluka pamaziko achitsulo cha rabara chomwe chimazungulira pang'onopang'ono. , Imachitika pang'onopang'ono pamene ikutsanulira ndikupukuta, ndipo pamapeto pake rabara imapangidwa. Njirayi sikuti ndi yochepa chabe, imakhala ndi makina ambiri komanso automation, komanso imachotsa kufunikira kwa nkhungu zazikulu. Imatha kupanga ma roller a rabara amitundu yosiyanasiyana ndi kukula kwake nthawi iliyonse, zomwe zimachepetsa kwambiri mtengo. Yakhala njira yayikulu yopangira ma roller a rabara a PUR.
Kuphatikiza apo, ma roller a rabara ang'onoang'ono omwe amagwiritsidwa ntchito popanga zida zodziyimira pawokha zamaofesi ndi rabara ya silicone yamadzimadzi akukula mofulumira padziko lonse lapansi. Amagawidwa m'magulu awiri: heating curing (LTV) ndi room temperature curing (RTV). Zipangizo zomwe zimagwiritsidwa ntchito ndizosiyana ndi PUR yomwe ili pamwambapa, ndikupanga mtundu wina wa casting. Apa, nkhani yofunika kwambiri ndi momwe mungayang'anire ndikuchepetsa kukhuthala kwa rabara kuti ikhale ndi mphamvu yothamanga komanso liwiro lotulutsa.
Nthawi yotumizira: Julayi-07-2021
