1. Umkhuba Wesici**
Phakathi nenqubo yokubumba umjovo, izifunda ezithile ze-mold cavity zingase zingabi nengcindezi eyanele.Njengoba ipulasitiki encibilikisiwe iqala ukuphola, izindawo ezinodonga olukhudlwana ziyancipha, zibangele ukucindezeleka okuqinile.Uma ukuqina kobuso bomkhiqizo obunjiwe kunganele futhi kungangezwe ngezinto ezincibilikisiwe ezanele, kuvela izimpawu zokucwila phezulu.Lesi simo sibizwa ngokuthi "ama-sink marks."Lokhu kuvame ukubonakala ezifundeni lapho ipulasitiki encibilikisiwe inqwabelana emgodini wesikhunta nasezigabeni eziwugqinsi zomkhiqizo, njengasezimbanjeni eziqinisayo, amakholomu asekelayo, kanye nokuphambana kwawo nendawo yomkhiqizo.
2. Izimbangela Nezisombululo ZamaSink Marks
Ukubonakala kwezimpawu zikasinki ezingxenyeni ezibunjwe ngomjovo akugcini nje ngokuwohloka ukukhanga kobuhle kodwa futhi kulimaza amandla azo okusebenza.Lesi simo sihlotshaniswa eduze nezinto zepulasitiki ezisetshenziswayo, inqubo yokubumba umjovo, kanye nokwakheka kwakho kokubili komkhiqizo kanye nesikhunta.
(i) Mayelana Nezinto Zepulasitiki
Amapulasitiki ahlukene anamazinga ahlukene okushwabana.Amapulasitiki e-crystalline, afana nenayiloni ne-polypropylene, asengozini yokucwila amamaki.Enqubweni yokubumba, lawa mapulasitiki, lapho eshisiwe, ashintshela esimweni esigelezayo esinama-molecule ahlelwe ngokungahleliwe.Lapho ejova endaweni yokubunjwa ebandayo, la ma-molecule aqhubeka aqondana ukuze akhe amakristalu, okuholela ekwehleni okukhulu kwevolumu.Lokhu kubangela ubukhulu obuncane kunalokho okushiwo, ngaleyo ndlela kubangele "izimpawu zokucwila."
(I-2) Kusukela ku-Injection Molding Process Perspective
Mayelana nenqubo yokubumba umjovo, izimbangela zamamaki wokucwila zihlanganisa ukucindezela okunganele kokubamba, isivinini somjovo esinensayo, isikhunta esiphansi kakhulu noma izinga lokushisa lempahla, kanye nesikhathi esinganele sokubamba.Ngakho-ke, lapho usetha amapharamitha enqubo yokubumba, kubalulekile ukuqinisekisa izimo ezifanele zokubumba kanye nengcindezi yokubamba eyanele ukuze unciphise izimpawu zokucwila.Ngokuvamile, ukwelula isikhathi sokubamba kuqinisekisa ukuthi umkhiqizo unesikhathi esanele sokupholisa kanye nokwengezwa kwezinto ezincibilikisiwe.
(iii) Okuhlobene Nomkhiqizo kanye Nokwakheka Kwesikhunta
Isizathu esiyisisekelo samamaki osinki ukushuba kodonga olungalingani lomkhiqizo wepulasitiki.Izibonelo zakudala zifaka phakathi ukwakheka kwamamaki kasinki azungeze izimbambo eziqinisayo namakholomu asekelayo.Ngaphezu kwalokho, izici zokuklama isikhunta njengedizayini yesistimu yomgijimi, usayizi wesango, nokusebenza kahle kokupholisa kunomthelela omkhulu kumkhiqizo.Ngenxa yokushisa okuphansi kwamapulasitiki, izifunda ezikude nezindonga zesikhunta zipholile kancane.Ngakho-ke, kufanele kube nezinto ezincibilikisiwe ezanele zokugcwalisa lezi zifunda, ezidinga isikulufu somshini wokubumba umjovo ukuze kugcinwe ingcindezi ngesikhathi sokujova noma ukubamba, ukuvimbela ukugeleza okubuyela emuva.Ngokuphambene, uma abagijimi besikhunta bezacile kakhulu, bende kakhulu, noma isango lincane kakhulu futhi liphola ngokushesha, ipulasitiki eqinile ingase ivimbe umgijimi noma isango, okuholela ekwehleni kwengcindezi emgodini wokukhunta, kugcine ngokucwila komkhiqizo. amamaki.
Kafushane, izimbangela zezimpawu zokucwila zihlanganisa ukugcwaliswa kwesikhunta okunganele, ipulasitiki encibilikisiwe eyanele, ukucindezelwa komjovo okunganele, ukubamba okunganele, ukushintshela kumfutho wokubamba ngaphambi kwesikhathi, isikhathi somjovo esifushane kakhulu, isivinini sokujova esinensa kakhulu noma esisheshayo (okuholela emoyeni ovaleleke), esingaphansi noma esingalingani. amasango (esikhunjeni esinezimbotshana eziningi), ukuvinjwa kwemibhobho noma amabhande okufudumeza angasebenzi kahle, izinga lokushisa elingafaneleki lokuncibilika, izinga lokushisa elingaphansi kwesikhunta (okuholela ekushintshashintsheni ezimbanjeni noma ezinsikeni), ukungangeni kahle kokuphuma kwamanzi ezindaweni zomaka usinki, izindonga eziwugqinsi ezimbanjeni noma ezinsikeni, ezingagqokwanga. -buyisela ama-valve aholela ekugelezeni okudlulele emuva, ukuma kwesango okungafanele noma izindlela zokugeleza ezinde ngokweqile, kanye nabagijimi abancane kakhulu noma abade.
Ukuze unciphise izimpawu zokucwila, amakhambi alandelayo angasetshenziswa: ukukhulisa umthamo womjovo oncibilikayo, ukwandisa ukuncibilika kokulinganisa kwemitha, ukukhulisa ingcindezi yomjovo, ukuphakamisa ingcindezi yokubamba noma ukwelula ubude bayo, ukwelula isikhathi somjovo (usebenzisa umsebenzi wokukhipha ngaphambili), ukulungisa umjovo. isivinini, ukukhulisa usayizi wesango noma ukuqinisekisa ukugeleza okulinganayo ekubunjweni okunezimbotshana eziningi, ukuhlanza umlomo wanoma yiziphi izinto zangaphandle noma ukufaka amabhande okushisa angasebenzi kahle, ukulungisa umlomo wombhobho nokuwuvikela kahle noma ukwehlisa umfutho ongemuva, ukwandisa izinga lokushisa elincibilikayo, ukulungisa izinga lokushisa lesikhunta, uma ucabangela izikhathi zokupholisa ezandisiwe, yethula imigudu yokukhipha umoya ezindaweni eziwuphawu lukasinki, iqinisekisa ukujiya kodonga (usebenzisa ukubumba komjovo osizwa ngegesi uma kunesidingo), esikhundleni samavalvu angabuyi agugile, ukubeka isango ezindaweni eziwugqinsi noma ukwandisa inani lamasango, nokulungisa umgijimi. izilinganiso nobude.
Indawo: Ningbo Chenshen Plastic Industry, Yuyao, Ningbo, Zhejiang Province, China
Idethi: 24/10/2023
Isikhathi sokuthumela: Oct-30-2023