Powomba kukonza nkhungu, ndi zinthu ziti zazikulu zomwe zingakhudze mankhwalawa?

M'kati mwa kuwomba kukonza nkhungu, zinthu zomwe zingakhudze mankhwalawa makamaka zikuphatikizapo kuthamanga kwa mpweya, kuthamanga kwa mphepo, kuwomba chiŵerengero ndi kuwomba kutentha kwa nkhungu.

Kuwomba akamaumba nkhungu processing

1. Pakuwomba, mpweya woponderezedwa uli ndi ntchito ziwiri: imodzi ndiyo kugwiritsa ntchito mphamvu ya mpweya woponderezedwa kuti apange semi-molten chubu billet kuwomba ndikumamatira ku khoma la nkhungu kuti apange mawonekedwe omwe akufuna;Chachiwiri, imakhala ndi gawo loziziritsa muzinthu zowumba za Dongguan.Kuthamanga kwa mpweya kumadalira mtundu wa pulasitiki ndi kutentha kwa billet, komwe kumayendetsedwa mu 0.2 ~ 1.0mpa.Kwa mapulasitiki okhala ndi viscosity yotsika yosungunuka komanso kusinthika kosavuta (monga PA ndi HDPE), tengani mtengo wotsika;Kwa mapulasitiki okhala ndi viscosity yosungunuka kwambiri (monga PC), zikhalidwe zapamwamba zimatengedwa, komanso makulidwe a khoma la billet.Kuwomba kuthamanga kumagwirizananso ndi kuchuluka kwa zinthu, zinthu zazikuluzikulu zimayenera kugwiritsa ntchito mphamvu yowomba kwambiri, zinthu zazing'onoting'ono zimayenera kugwiritsa ntchito mphamvu yakuwomba yaying'ono.Kuwomba koyenera kwambiri kuyenera kupangitsa mawonekedwe ndi mawonekedwe a chinthucho kukhala chomveka pambuyo popanga.

2, kuwomba liwiro kuti kufupikitsa nthawi kuwomba, kotero kuti n'zogwirizana ndi mankhwala kupeza makulidwe yunifolomu ndi maonekedwe bwino, zofunika za otsika liwiro otaya mu lalikulu otaya mpweya, kuonetsetsa kuti billet mu nkhungu patsekeke akhoza kukhala yunifolomu, mofulumira kukula, kufupikitsa kuzirala nthawi mu nkhungu patsekeke, ndi abwino kupititsa patsogolo ntchito mankhwala.Kuthamanga kwapansi kwa mpweya kungathenso kupewa mtundu wa Venduri mu billet ndi mapangidwe a vacuum wamba, kotero kuti billet deflated chodabwitsa.Izi zitha kutsimikiziridwa pogwiritsa ntchito chitoliro chokulirapo.

3, chiŵerengero cha kuwomba pamene kukula ndi khalidwe la billet ndi lotsimikizika, kukula kwake kwa mankhwala, kukulirakulira kwa chiŵerengero cha billet, koma kumachepetsa makulidwe a mankhwala.Kawirikawiri molingana ndi mtundu wa pulasitiki, chilengedwe, mawonekedwe ndi kukula kwa mankhwala, ndi kukula kwa billet kudziwa kukula kwa chiŵerengero chowomba.Ndi kuwonjezeka kwa chiŵerengero chowomba, makulidwe a mankhwalawa amakhala ochepa kwambiri, ndipo mphamvu ndi kuuma kumachepa.Zimakhalanso zovuta kupanga.Kawirikawiri, chiŵerengero cha kuwomba chimayendetsedwa mu l2-4) kapena apo.

4. Kutentha kwa nkhungu yowuma nkhonya kumakhudza kwambiri ubwino wa mankhwala (makamaka maonekedwe abwino).Kawirikawiri nkhungu kutentha yogawa ayenera kukhala yunifolomu, mmene ndingathere kuti mankhwala yunifolomu kuzirala.Kutentha kwa nkhungu kumagwirizana ndi mtundu wa pulasitiki, makulidwe ndi kukula kwa zinthu.Kwa mitundu yosiyanasiyana ya pulasitiki, pali mapulasitiki ochepa (botolo lopangira ma PC) kutentha kwa nkhungu kuyenera kuyendetsedwa m'magawo.

Kupanga mchitidwe watsimikizira kuti nkhungu kutentha ndi otsika kwambiri, ndiye elongation wa pulasitiki pa kopanira yafupika, si kophweka kuwomba, kotero kuti mankhwala unakhuthala mu gawo ili, ndipo n'zovuta kupanga, ndi contour ndi chitsanzo cha mankhwala pamwamba si bwino;Kutentha kwa nkhungu ndikwambiri, nthawi yozizira imatalika, nthawi yopangira imachulukira, ndipo zokolola zimachepa.Panthawi imeneyi, ngati kuzirala sikokwanira, kungayambitsenso kusokoneza kwa mankhwala, kutsika kwa shrinkage kumawonjezeka, ndipo kuwala kwapamwamba kumakhala koipitsitsa.Nthawi zambiri mapulasitiki okhala ndi unyolo wokulirapo wa maselo, kutentha kwa nkhungu kuyenera kukhala kwakukulu;Kwa mapulasitiki okhala ndi maunyolo akuluakulu osinthika a maselo, kutentha kwa nkhungu kuyenera kuchepetsedwa.

Hollow kuwomba akamaumba mankhwala mu nkhungu yozizira nthawi yaitali, cholinga ndi kuonetsetsa kuti mankhwala mokwanira utakhazikika, demoulding popanda mapindikidwe.Nthawi yozizira nthawi zambiri imadalira makulidwe, kukula ndi mawonekedwe a pulasitiki, komanso mtundu wa pulasitiki.Kuchuluka kwa khoma, kumakhalanso nthawi yayitali yozizirira.Nthawi yozizira ya zinthu za 61PE zokhala ndi kutentha kwakukulu kwapadera ndizotalikirapo kuposa za PP zokhala ndi mphamvu yaying'ono yotentha yofanana ndi makulidwe a khoma lomwelo.

5. Kuumba kuzungulira Kuwomba akamaumba kupanga mkombero kumaphatikizapo extrusion billet, kufa kutseka, kudula billet, kuwomba, deflating, kutsegula nkhungu, kutulutsa katundu ndi njira zina.Mfundo ya kusankha kozungulira uku ndikufupikitsa momwe mungathere poonetsetsa kuti chinthucho chikhoza kupangidwa popanda deformation, kuti apititse patsogolo kupanga bwino.