Polyethylene (PE) imagwiritsidwa ntchito kwambiri popangakutchinjiriza ndi kutsekera kwa zingwe zamagetsi ndi zingwe zama telecommunicationchifukwa cha mphamvu zake zamakina, kulimba, kukana kutentha, kutchinjiriza, komanso kukhazikika kwamankhwala. Komabe, chifukwa cha mawonekedwe a PE palokha, kukana kwake kupsinjika kwa chilengedwe ndikocheperako. Nkhaniyi imakhala yodziwika kwambiri pamene PE imagwiritsidwa ntchito ngati chingwe chakunja cha zingwe zazikulu zankhondo.
1. Njira ya PE Sheath Cracking
Kusweka kwa PE sheath kumachitika muzochitika ziwiri:
a. Environmental Stress Cracking: Izi zimatanthawuza chochitika chomwe sheath imakumana ndi brittle kusweka kuchokera pamwamba chifukwa cha kupsinjika kophatikizana kapena kukhudzana ndi zowulutsa zachilengedwe pambuyo poyika chingwe ndikugwiritsa ntchito. Zimayamba chifukwa cha kupsinjika kwamkati mkati mwa sheath komanso kukhudzana kwanthawi yayitali ndi zakumwa za polar. Kufufuza kwakukulu pakusintha kwazinthu kwathetsa kwambiri kusweka kwamtunduwu.
b. Mechanical Stress Cracking: Izi zimachitika chifukwa cha kusokonekera kwachingwe kapena njira zosayenera za sheath extrusion, zomwe zimapangitsa kuti pakhale kupsinjika kwakukulu komanso kusweka kochititsa chidwi pakuyika chingwe. Kusweka kotereku kumawonekera kwambiri m'matumba akunja a zingwe zazikulu zazitsulo zokhala ndi tepi.
2. Zomwe Zimayambitsa PE Sheath Craking ndi Njira Zowonjezereka
2.1 Mphamvu ya ChingweTepi yachitsuloKapangidwe
M'zingwe zokhala ndi mainchesi akulu akunja, wosanjikiza wankhondo nthawi zambiri amakhala ndi zitsulo zosanjikiza ziwiri. Kutengera kukula kwa chingwe chakunja, makulidwe a tepi yachitsulo amasiyanasiyana (0.2mm, 0.5mm, ndi 0.8mm). Matepi achitsulo okhuthala okhala ndi zida amakhala olimba kwambiri komanso pulasitiki yocheperako, zomwe zimapangitsa kuti pakhale kusiyana kwakukulu pakati pa zigawo zapamwamba ndi zapansi. Pa extrusion, izi zimayambitsa kusiyana kwakukulu kwa makulidwe a sheath pakati pa zigawo zapamwamba ndi zapansi za pamwamba pa zida zankhondo. Madera ocheperako omwe ali m'mphepete mwa tepi yakunja yachitsulo amakhala ndi nkhawa kwambiri ndipo ndi malo oyamba kumene kusweka kwamtsogolo kumachitika.
Kuti muchepetse mphamvu ya tepi yachitsulo yokhala ndi zida zankhondo pachimake chakunja, chotchinga cha makulidwe ena chimakutidwa kapena kutulutsa pakati pa tepi yachitsulo ndi sheath ya PE. Chosanjikiza ichi chiyenera kukhala chowundana mofanana, popanda makwinya kapena ma protrusions. Kuwonjezera kwa buffering wosanjikiza kumapangitsa kusalala pakati pa zigawo ziwiri za tepi yachitsulo, kuonetsetsa kuti makulidwe a PE sheath yunifolomu, ndipo, kuphatikizapo kudulidwa kwa PE sheath, kumachepetsa kupsinjika kwamkati.
ONEWORLD imapereka ogwiritsa ntchito makulidwe osiyanasiyana akanasonkhezereka zitsulo tepi zida zidakukwaniritsa zosowa zosiyanasiyana.
2.2 Zotsatira za Njira Yopangira Chingwe
Zofunikira zazikulu ndi njira yotulutsira zingwe zazikulu zakunja zokhala ndi zida zakunja ndizozizira bwino, kukonzekera molakwika nkhungu, komanso kutambasula mochulukira, zomwe zimapangitsa kupsinjika kwamkati mkati mwa sheath. Zingwe zazikuluzikulu, chifukwa cha makulidwe awo okhuthala komanso otakata, nthawi zambiri zimakumana ndi malire muutali ndi kuchuluka kwa zotengera zamadzi pamizere yopangira ma extrusion. Kuzizira kuchokera pa madigiri 200 Celsius panthawi ya extrusion mpaka kutentha kumabweretsa zovuta. Kuzizira kosakwanira kumabweretsa chiwombankhanga chofewa pafupi ndi zida zankhondo, zomwe zimayambitsa kukanda pamwamba pa sheath pamene chingwecho chimakulungidwa, zomwe zimapangitsa kuti pakhale ming'alu ndi kusweka panthawi yoyika chingwe chifukwa cha mphamvu zakunja. Kuphatikiza apo, kuzizira kosakwanira kumathandizira kuti mphamvu zamkati ziwonjezeke pambuyo pozungulira, zomwe zimakulitsa chiwopsezo cha kusweka kwa sheath ndi mphamvu zakunja. Kuonetsetsa kuti kuziziritsa kokwanira, kuonjezera kutalika kapena kuchuluka kwa zotengera zamadzi ndikulimbikitsidwa. Kutsitsa kuthamanga kwa extrusion ndikusunga mapulasitiki oyenera komanso kulola nthawi yokwanira yoziziritsa panthawi yopindika ndikofunikira. Kuonjezera apo, poganizira polyethylene ngati crystalline polima, njira yochepetsera kutentha yochepetsera kutentha, kuchokera ku 70-75 ° C mpaka 50-55 ° C, ndipo potsiriza kutentha kwa chipinda, kumathandiza kuchepetsa kupsinjika kwa mkati panthawi yozizira.
2.3 Mphamvu ya Coiling Radius pa Coiling Coiling Radius
Panthawi yopangira chingwe, opanga amatsatira miyezo yamakampani posankha ma reel oyenera operekera. Komabe, kukhala ndi nthawi yayitali yotumizira zingwe zazikulu zakunja kumabweretsa zovuta pakusankha ma reel oyenera. Kuti akwaniritse kutalika kwake komwe kumaperekedwa, opanga ena amachepetsa mipiringidzo ya reel, zomwe zimapangitsa kuti chingwecho chisakwane. Kupindika kwambiri kumabweretsa kusamuka kwa zida zankhondo, zomwe zimapangitsa kuti pakhale mphamvu zometa pa sheath. Zikavuta kwambiri, mikwingwirima ya zitsulo zokhala ndi zida zonyamula zida imatha kuboola pansanjika, ndikulowa mu sheath ndikupangitsa ming'alu kapena kung'ambika m'mphepete mwa chitsulocho. Panthawi yoyika chingwe, mphamvu yopindika ndi kukoka imapangitsa kuti chipolopolocho chiphwanyike pazing'onozi, makamaka zingwe zomwe zili pafupi ndi zigawo zamkati za reel, zomwe zimapangitsa kuti zikhale zosavuta kusweka.
2.4 Zokhudza Kumanga Pamalo ndi Kuyika Malo
Kuti mukhazikitse kamangidwe ka chingwe, ndikulangizidwa kuti muchepetse kuthamanga kwa chingwe, kupewa kuthamanga kwambiri, kupindika, kukoka mphamvu, ndi kugundana pamwamba, ndikuwonetsetsa kuti malo omanga atukuka. Makamaka, musanayambe kuyika chingwe, lolani chingwecho kuti chipume pa 50-60 ° C kuti mutulutse kupsinjika kwamkati kuchokera ku sheath. Pewani kuyang'ana kwanthawi yayitali kwa zingwe kuti ziwongolere kuwala kwa dzuwa, chifukwa kutentha kwa mbali zosiyanasiyana za chingwe kungayambitse kupsinjika, kukulitsa chiwopsezo cha kusweka kwa sheath pakuyika chingwe.
Nthawi yotumiza: Dec-18-2023