The ndondomeko nkhonya akamaumba ndi zovuta, ndipo pali zinthu zambiri zimakhudza khalidwe la mankhwala, amene zambiri monga mawonekedwe a mankhwala, ntchito ya zipangizo ndi magawo ndondomeko akamaumba.Ngakhale pali zinthu zambiri zomwe zimakhudza momwe zinthu zimagwirira ntchito, pamene zofunikira za mankhwala ndi ndondomeko zomwe zimagwiritsidwa ntchito zimatsimikiziridwa, ubwino wa mankhwalawo ukhoza kukonzedwa bwino mwa kusintha zinthu zomwe zimalimbikitsa, zomwe zingathe kukwaniritsa cholinga chochepetsera kugwiritsa ntchito zipangizo zopangira, kuchepetsa kupanga. nthawi ndi kukhathamiritsa ntchito ya mankhwala.
1, Mtundu wa zinthu
Katundu ndi mitundu yosiyanasiyana ya utomoni zopangira zipangitsa kuti ukadaulo wopangira ndi kuumba ndi zida zisinthe.Mlozera wosungunuka, kulemera kwa maselo ndi rheological katundu wa utomoni zopangira zidzakhudza mapangidwe a zinthu, makamaka mu gawo la extrusion la billet, kusungunuka kwamadzimadzi kumapangitsa kuti billet ikhale yosavuta kupanga sag phenomenon, idzatsogolera kukhoma. makulidwe a zinthu zoonda komanso zosagwirizana kugawa.
2, Maonekedwe a mankhwala
Pamene maonekedwe a nkhonya akamaumba mankhwala ndi zovuta kwambiri, chifukwa nkhonya akamaumba mankhwala pa malo aliwonse a chiŵerengero nkhonya kukula ndi osiyana.Mphepete mwa ma convex, chogwirira, ngodya ndi malo ena a mankhwala chifukwa cha kusintha kwa mawonekedwe ndi kwakukulu, makulidwe a khoma la mankhwalawa ayenera kukhala ochepa, kotero mukamawomba kuwombera kuonjezera mbali iyi ya billet khoma makulidwe.Maonekedwe azinthu zamafakitale ndizovuta kwambiri, zokhala ndi ngodya zambiri ndi m'mphepete mwa convex.The kuwomba chiŵerengero cha mbali zimenezi ndi lalikulu kuposa mbali zina lathyathyathya, ndipo khoma makulidwe ndi ndi woonda, kotero makulidwe kugawa za dzenje nkhonya kuumbidwa mankhwala si yunifolomu.
3, Kukula kwa nkhungu ndikuwonjezedwa koyima kwa parison
Chimodzi mwazofunikira kwambiri panjira yowumba mobowola ndikupangira ma extrusion opanda kanthu.Kukula ndi makulidwe a chopanda kanthu zimatsimikizira kukula ndi makulidwe a khoma la chinthucho.Chochitika cha kusungunula vertical extension ndi kukulitsa nkhungu zidzapangidwa popanga billet.Kuwonjezedwa kwachindunji kwa billet ndi zotsatira za mphamvu yokoka yake, yomwe imapangitsa kuti kutalika kwa billet kuchuluke ndipo makulidwe ndi m'mimba mwake zimachepa.Pamene zopangira zimatenthedwa ndikusungunuka ndi extruder, kusinthika kosasinthika kwa viscoelastic kumachitika pamene zinthuzo zimadutsa pamutu, zomwe zimapangitsa kutalika kwa billet kufupikitsa ndipo makulidwe ndi m'mimba mwake zimawonjezeka.M`kati extrusion ndi kuwomba akamaumba, zochitika ziwiri ofukula kutambasuka ndi nkhungu kukula chikoka pa nthawi yomweyo, kuonjezera vuto la nkhonya akamaumba, komanso kupanga mankhwala makulidwe kugawa si yunifolomu.
4, Kutentha kwa processing
HDPE processing kutentha zambiri 160 ~ 210 ℃.Processing kutentha kwambiri, adzapanga mtundu wa billet sag chodabwitsa n'zoonekeratu, khoma makulidwe kugawa si yunifolomu, koma pamwamba pa mankhwala adzakhala yosalala;Kutentha kwa mutu wa imfa kuyenera kukhala pafupi kwambiri ndi kutentha kwa gawo lotentha.Kutentha kwa pakamwa pa kapu kuyenera kukhala kochepa kwambiri kusiyana ndi mutu wa imfa, zomwe zingachepetse mphamvu ya kukula kwa nkhungu ya parison.
5, Mlingo wa extrusion
Ndi kuwonjezeka kwa liwiro la extrusion, kukula kwa nkhungu kukulirakulira kwa billet, makulidwe a billet adzawonjezeka.Ngati liwiro la extrusion liri lochedwa kwambiri, billet nthawi yayitali imakhudzidwa ndi kulemera kwake, momwe zimakhalira zovuta kwambiri za billet.Kuthamanga kwa Extrusion ndikothamanga kwambiri, kudzachititsa mtundu wa billet shark khungu chodabwitsa, chachikulu chidzatsogolera ku mtundu wa billet kupasuka.Kuthamanga kwa extrusion kudzakhudzidwa ndi nthawi yowomba, kuthamanga kwambiri kudzachepetsa nthawi yowomba, kungapangitse kuti mankhwalawa asapangidwe.Kuthamanga kwa extrusion kudzakhudza makulidwe a pamwamba ndi khoma la mankhwala, kotero kuti liwiro la extrusion liyenera kusinthidwa nthawi zonse.
6, Chiŵerengero cha kuwomba ndi kukulitsa
Kusungunuka kwa mkati ndi kunja kwa malo opanda kanthu kudzawombedwa ndikufalikira mofulumira mu nkhungu ndi pafupi ndi pamwamba pa nkhungu mpaka itakhazikika ndikupangidwa.Chopanda kanthu chokhala ndi mainchesi okulirapo mkati mwa nkhungu chidzakumana ndi kupsinjika kwakukulu (chiŵerengero cha pakati pa nkhungu ndi kukula kwake ndi kukula kwa chopanda kanthu panthawiyi ndi chiŵerengero chowombera).Kutuluka kwa mpweya kumakhala kosavuta kuchitika panthawi yowombera ndi kutupa kwa mawonekedwe akuluakulu a botolo, zomwe zimabweretsa kulephera kwa kuwomba ndi kupanga.Maonekedwe a mankhwala amakhudza kwambiri chiŵerengero cha blowout panthawi yowumba.Powombera mankhwala ndi mawonekedwe osagwirizana, chiŵerengero chowombera sichiyenera kukhala chachikulu, mwinamwake n'zosavuta kutsogolera kusungunuka.
7, Kuwomba kuthamanga ndi nthawi
Popanga nkhonya, mpweya woponderezedwa ukhoza kupanga billet kuwomba ndi kupanga ndikumamatira mkati mwa nkhungu.Kuthamanga kwa billet kumatsimikiziridwa ndi kuthamanga kwa mpweya.Pamene kupanikizika kwa mpweya kuli kwakukulu kwambiri, kuthamanga kwapang'onopang'ono kwa chopanda kanthu kumakhala mofulumira, zomwe zidzapangitse ndege kukhala gawo lopanda kanthu mwamsanga pafupi ndi mkati mwa nkhungu, kotero kuti kutentha kwa chopandacho kumachepetsedwa mothandizidwa ndi nkhungu. , ndipo chopanda kanthu chimapangidwa pang'onopang'ono, chomwe sichingapitirize kupunduka.Panthawiyi, chifukwa cha kusiyana kwakukulu kwa mawonekedwe, mbali ya ngodya ya billet siinagwirizane ndi nkhungu, ndipo kusinthika kumapitirirabe, zomwe zimapangitsa kuti pakhale kugawidwa kosiyana kwa khoma la mankhwala.Pamene kupanikizika kwa gasi kumakhala kochepa kwambiri, kuumba kwa mankhwalawa kumakhala kovuta, ndipo chifukwa chakuti kupanikizika kumagwira ntchito kumakhala kochepa kwambiri, billet idzachepa ndipo sichikhoza kupeza zinthu zabwino, choncho m'pofunika kulamulira mpweya wabwino pamene mukuwomba.Kuwomba kwazinthu zopanda kanthu nthawi zambiri kumayendetsedwa mu 0.2 ~ 1 MPa.Kuwombera nthawi kumatsimikiziridwa ndi nthawi yowomba, kukakamiza kugwira nthawi ndi nthawi yozizira ya mankhwala.Ngati nthawi yowombayo ndi yochepa kwambiri, imapangitsa kuti nthawi yopangira mankhwala ikhale yochepa, palibe nthawi yokwanira yogwira ntchito komanso nthawi yozizira, billet idzakhala ikucheperachepera mkati, pamwamba imakhala yovuta, imakhudza maonekedwe a mankhwala, ngakhale sangathe. kupangidwa;Ngati nthawi yowomberayo ndi yayitali kwambiri, mankhwalawa amatha kukhala ndi mawonekedwe abwino, koma amatalikitsa nthawi yopanga.
8, Kutentha kwa nkhungu ndi nthawi yozizira
Kudulidwa kwa kufa nthawi zambiri kumapangidwa ndi zitsulo zolimba kwambiri, motero zimafunika kuziziritsa kwambiri.Kutentha kwa nkhungu ndikotsika kwambiri kumapangitsa nkhungu kudula kuzirala mwachangu, palibe ductility;Kutentha kwakukulu kumapangitsa billet kuzirala sikokwanira, kudula nkhungu kudzakhala kochepa kwambiri, chinthu chodziwika bwino cha shrinkage chimakhala chodziwikiratu pamene kuzizira, kumapangitsa kuti mankhwalawa awonongeke kwambiri.Nthawi yozizira imakhala yayitali, chikoka cha kutentha kwa nkhungu pa mankhwalawa ndi chaching'ono, kuchepa sikuwonekera;Nthawi yozizira ndi yochepa kwambiri, billet idzakhala ndi chodabwitsa chodziwika bwino cha shrinkage, mankhwalawo adzakhala ovuta, choncho m'pofunika kuwongolera kutentha kwa nkhungu ndi nthawi yozizira.
9, Kuthamanga kwa screw
Kuthamanga kwa screw kudzakhudza ubwino wa billet ndi mphamvu ya extruder.Kukula kwa liwiro la screw ndi malire ndi zopangira, mawonekedwe a mankhwala, kukula ndi mawonekedwe a screw.Pamene liwiro lozungulira liri lochepa kwambiri, mphamvu yogwira ntchito ya extruder mwachiwonekere imachepetsedwa, ndipo nthawi yotambasula yowongoka ya billet ndi yaitali, yomwe imayambitsa kugawidwa kosagwirizana kwa khoma lazitsulo.Kuonjezera liwiro lozungulira kumachepetsa nthawi yogwiritsira ntchito ndikuwonjezera mphamvu yogwiritsira ntchito mphamvu.Nthawi yomweyo, kuwonjezereka kwa screw liwiro kumatha kukulitsa kumeta ubweya wa screw kuzinthu zopangira ndikuwongolera mawonekedwe a chinthucho.Koma liwiro la screw sikuyenera kukhala lalitali kwambiri, chifukwa liwiro limakhala lalitali kwambiri limapangitsa kuti zopangira m'mutu ndi pakamwa pa kapu zikhale zazifupi, kugawa kutentha sikuli yunifolomu, makulidwe a khoma la billet amakhudzidwa, ndiyeno zimakhudza maonekedwe a mankhwala.Kwambiri kasinthasintha liwiro komanso kuonjezera mikangano mphamvu, kupanga kwambiri kutentha zingachititse kuwonongeka kwa zipangizo, angaoneke Sungunulani chophukacho chodabwitsa.
Nthawi yotumiza: Nov-19-2022