Khamu la pulasitiki extruder ndi extruder, yomwe ili ndi dongosolo extrusion, dongosolo kufala ndi Kutentha ndi kuzirala dongosolo.
1.extrusion system
Dongosolo la extrusion limaphatikizapo wononga, mbiya, hopper, mutu, ndi nkhungu.Pulasitiki ndi plasticized mu yunifolomu kusungunula kudzera dongosolo extrusion, ndipo mosalekeza extruded ndi wononga pansi pa kupsyinjika anakhazikitsa ndondomekoyi.
⑴Screw: Ndilo gawo lofunikira kwambiri la extruder, lomwe limagwirizana mwachindunji ndi kuchuluka kwa ntchito ndi kutulutsa kwachotulutsa, ndipo limapangidwa ndi chitsulo champhamvu kwambiri komanso chosawononga dzimbiri.
⑵Silinda: Ndi silinda yachitsulo, yomwe nthawi zambiri imakhala yosagwira kutentha, mphamvu yopondereza kwambiri, yosamva kuvala, chitsulo chosapanga dzimbiri kapena chitoliro chachitsulo chophatikizidwa ndi chitsulo cha alloy.Mgolo umagwirizana ndi wononga kuti uzindikire kuphwanyidwa, kufewetsa, kusungunuka, kupanga pulasitiki, kutopa ndi kuphatikizika kwa pulasitiki, ndikunyamula mphira mosalekeza kupita kumalo owumba.Nthawi zambiri, kutalika kwa mbiya ndi 15 mpaka 30 m'mimba mwake, kotero kuti pulasitiki imatha kutenthedwa bwino ndikuyika pulasitiki ngati mfundo.
(3) Hopper: Chipangizo chodulidwa chimayikidwa pansi pa hopper kuti chisinthe ndikudula kutuluka kwa zinthu.Mbali ya hopper ili ndi dzenje lowonera ndi chipangizo choyezera metering.
⑷ Mutu wamakina ndi nkhungu: Mutu wamakina umapangidwa ndi manja amkati achitsulo chachitsulo ndi manja akunja achitsulo.Pali kupanga nkhungu mkati mwa mutu wa makina.Khazikitsani, ndipo perekani pulasitiki mphamvu yopangira yofunikira.Pulasitiki imapangidwa ndi pulasitiki ndikuphatikizidwa mu mbiya yamakina, ndipo imalowa mu nkhungu ya mutu wa makina kudzera mu mbale ya porous fyuluta pamodzi ndi njira ina yotuluka pakhosi la mutu wa makina.Chophimba chokhazikika cha tubular chimapangidwa mozungulira waya wapakati.Pofuna kuonetsetsa kuti njira yoyendetsera pulasitiki pamutu wa makina ndi yomveka ndikuchotsa mbali yakufa ya pulasitiki yosonkhanitsidwa, malaya a shunt nthawi zambiri amaikidwa.Pofuna kuthetsa kusinthasintha kwa kuthamanga panthawi ya pulasitiki extrusion, mphete yofanana ndi kuthamanga imayikidwanso.Palinso chipangizo chowongolera nkhungu ndi chosinthira pamutu wamakina, chomwe chimakhala chosavuta kusintha ndikuwongolera kukhazikika kwa pachimake cha nkhungu ndi manja a nkhungu.
Malingana ndi ngodya yomwe ili pakati pa kayendetsedwe ka kayendetsedwe ka mutu ndi mzere wapakati wa screw, extruder imagawa mutu kukhala mutu wopindika (120o kuphatikizapo ngodya) ndi mutu wamanja.Chigoba cha mutu wamakina chimakhazikika pa thupi la makina okhala ndi mabawuti.Chikombole mkati mwa mutu wa makina chimakhala ndi mpando wapakati ndipo chimakhazikika pa doko lolowera la mutu wa makina ndi nati.Pamaso pa mpando pachimake okonzeka ndi pachimake, pachimake ndi pachimake mpando Pali dzenje pakati pa mawaya pachimake, ndi kuthamanga equalizing mphete waikidwa kutsogolo kwa mutu wa makina kuti agwirizane kupanikizika.Mbali yopangira extrusion imapangidwa ndi mpando wa manja ndi malaya ofera.Malo a mkono wakufa amatha kusinthidwa ndi bolt kudzera pa chithandizo., kusintha malo achibale a manja a nkhungu pakatikati pa nkhungu, kuti asinthe kufanana kwa makulidwe a cladding extruded, ndipo kunja kwa mutu kuli ndi chipangizo chotenthetsera ndi chipangizo choyezera kutentha.
2.transmission system
Ntchito ya makina opatsirana ndikuyendetsa screw ndi kupereka torque ndi liwiro lofunika ndi screw panthawi ya extrusion.Nthawi zambiri amapangidwa ndi mota, chochepetsera komanso chonyamula.
Poganizira kuti kapangidwe kake ndi kofanana, mtengo wopangira chochepetsera umakhala wolingana ndi kukula kwake ndi kulemera kwake.Chifukwa mawonekedwe ndi kulemera kwa chochepetsera ndi chachikulu, zikutanthauza kuti zipangizo zambiri zimadyedwa panthawi yopanga, ndipo zitsulo zomwe zimagwiritsidwa ntchito zimakhalanso zazikulu, zomwe zimawonjezera mtengo wopangira.
Pakuti extruders ndi yemweyo wononga m'mimba mwake, mkulu-liwiro ndi mkulu-mwachangu extruders amadya mphamvu kuposa extruders ochiritsira, mphamvu ya galimoto ndi kuwirikiza, ndi chimango kukula kwa reducer ndi lofanana kuchuluka.Koma kuthamanga kwa screw kumatanthauza kuchepetsa kuchepa.Kwa chochepetsera kukula komweko, ma gear modulus ocheperako ndi okulirapo kuposa kuchuluka kwakukulu kochepetsera, ndipo mphamvu yonyamula katundu yochepetsera imachulukitsidwanso.Chifukwa chake, kuchuluka kwa voliyumu ndi kulemera kwa chochepetsera sikuli kofanana ndi kuchuluka kwa mphamvu zamagalimoto.Ngati voliyumu ya extrusion imagwiritsidwa ntchito ngati denominator ndikugawanika ndi kulemera kwa chochepetsera, chiwerengero cha othamanga kwambiri komanso othamanga kwambiri ndi ochepa, ndipo chiwerengero cha extruders wamba ndi chachikulu.
Pankhani ya kutulutsa kwa unit, mphamvu yamagalimoto ya extruder yothamanga kwambiri komanso yogwira ntchito kwambiri ndi yaying'ono ndipo kulemera kwa chochepetsera kumakhala kochepa, zomwe zikutanthauza kuti mtengo wopangira ma unit of extruder yothamanga kwambiri ndi yotsika kwambiri ndi yotsika kuposa za extruders wamba.
3.kutentha ndi kuzizira chipangizo
Kutentha ndi kuziziritsa ndi zinthu zofunika kuti pulasitiki extrusion ndondomeko kugwira ntchito.
⑴Otulutsa nthawi zambiri amagwiritsa ntchito kutentha kwamagetsi, komwe kumagawika kutenthetsa kukana ndi kutentha kwa induction.Tsamba lotenthetsera limayikidwa mu gawo lililonse la fuselage, khosi la makina ndi mutu wamakina.Chipangizo chotenthetsera chimatenthetsa pulasitiki mu silinda kunja kuti itenthe mpaka kutentha komwe kumafunikira kuti ntchitoyi ichitike.
(2) Chipangizo chozizira chimakhazikitsidwa kuti chiwonetsetse kuti pulasitiki ili mu kutentha komwe kumafunika ndi ndondomekoyi.Makamaka, ndikuchotsa kutentha kochulukirapo komwe kumapangidwa ndi kukameta ubweya wa scrow kuzungulira, kuti mupewe kuwonongeka kwa pulasitiki, kuyaka kapena kuvutikira popanga chifukwa cha kutentha kwambiri.Pali mitundu iwiri ya kuziziritsa migolo: kuziziritsa madzi ndi kuziziritsa mpweya.Nthawi zambiri, kuzirala kwa mpweya kumakhala koyenera kwa ma extruders ang'onoang'ono ndi apakatikati, ndipo kuziziritsa kwamadzi kapena kuphatikiza kwa mitundu iwiri ya kuziziritsa nthawi zambiri kumagwiritsidwa ntchito popanga ma extruders akulu.Kuziziritsa kwa screw nthawi zambiri kumagwiritsa ntchito kuziziritsa kwamadzi kwapakati kuti kuwonjezere kuchuluka kwazinthu zoperekera zinthu., kukhazikika kwa guluu, ndikusintha mtundu wazinthu nthawi yomweyo;koma kuziziritsa pa hopper ndikulimbitsa mphamvu yotumizira zinthu zolimba ndikuletsa tinthu tating'onoting'ono tapulasitiki kuti tisamamatire chifukwa cha kukwera kwa kutentha ndikutchinga doko la chakudya, ndipo chachiwiri ndikuwonetsetsa kuti gawo lotumizira likuyenda bwino.
Nthawi yotumiza: Apr-20-2023
