Ekulungiseni kwethu umshini, sivame ukusebenzisa umjovo wezigaba eziningi.Isango lokulawula umjovo lezinga lokuqala, izinga lesibili lokulawula umjovo umzimba omkhulu, kanye nomjovo wezinga lesithathu ligcwalisa u-95% womkhiqizo, bese liqala ukugcina ingcindezi yokukhiqiza umkhiqizo ophelele.Phakathi kwabo, isivinini somjovo silawula izinga lokugcwalisa ukuncibilika, ingcindezi yomjovo iyisiqinisekiso sezinga lokugcwalisa, indawo yomjovo ilawula indawo yokuncibilika kokugeleza, futhi ingcindezi yokugcina ingcindezi isetshenziselwa ukulungisa isisindo somkhiqizo, usayizi, ukuguqulwa, kanye ukuncipha.
>> Ukunqunywa kokuqala kokucindezela komjovo ngesikhathi sokuqaliswa komkhiqizo nokusetshenziswa:
Ngesikhathi siqala umshini wokulungisa ipharamitha, ingcindezi yomjovo izoba phezulu kunevelu ebekiwe yangempela.
Ngoba ingcindezi umjovo iphansi kakhulu, theumjovo isikhunta(izinga lokushisa) libanda kakhulu, futhi ibala likawoyela elingaphezulu kwesikhunta kuzodala ukumelana okukhulu.Kunzima ukujova ukuncibilika emgodini wesikhunta, futhi kungase kungakhiwe ngenxa yokucindezela okunganele (ukunamathela isikhunta sangaphambili, ukuxhuma isango);Uma ukucindezela komjovo kuphezulu kakhulu, umkhiqizo uzoba nokucindezeleka okukhulu kwangaphakathi, okulula ukubangela ama-burrs futhi unciphise impilo yesevisi yesikhunta.Kungase futhi kuholele endaweni yokuxhuma yomkhiqizo, ubunzima bokudiliza, ukuklwebheka endaweni yomkhiqizo, ngisho nesikhunta sizonwetshwa ezimweni ezimbi kakhulu.Ngakho-ke, ingcindezi yomjovo kufanele isethwe ngokuya ngamaphuzu alandelayo ngesikhathi sokuqalisa nokuthunywa.
1. Isakhiwo somkhiqizo kanye nesimo.
2. Usayizi womkhiqizo (ubude bokuncibilika kokuncibilika).
3. Ukujiya komkhiqizo.
4. Izinto ezisetshenziswayo.
5. Uhlobo lwesango lokubunjwa.
6. Ukushisa kwesikulufa somshini wokubumba umjovo.
7. Izinga lokushisa lesikhunta (kuhlanganise nokushisa kokushisa kwesikhunta).
>> Ukukhubazeka okuvamile okubangelwa ukucindezela komjovo ekukhiqizeni
Ukucindezela komjovo kusetshenziselwa ikakhulukazi ukugcwalisa kanye nokudla kokuncibilika emgodini wesikhunta.
Ekugcwalisweni kokubumba umjovo, ingcindezi yomjovo ikhona ukuze inqobe ukumelana nokugcwalisa.Lapho ukuncibilika kujovwa, kudinga ukunqoba ukumelana nesango lomgijimi we-nozzle ukuze kukhishwe umkhiqizo.Lapho ingcindezi yomjovo idlula ukumelana nokugeleza, ukuncibilika kuzogeleza.Ayinembile njengejubane lomjovo nendawo yomjovo.Ngokuvamile, silungisa umkhiqizo ngesivinini njengesithenjwa.Ukwanda kokucindezela komjovo kungagcina izinga lokushisa eliphakeme lokuncibilika futhi kunciphise ukulahlekelwa kokumelana kwesiteshi, Ingxenye engaphakathi yomkhiqizo iqinile futhi iminyene.
>> Zinzisa imingcele yenqubo ngemuva kokugunyazwa komkhiqizo
Izici ezithinta ngqo ukucindezela komjovo: ukugeleza kwesisombululo, i-viscosity yezinto kanye nezinga lokushisa lesikhunta.
Esimeni esifanele, yisayensi kakhulu ukuthi ingcindezi yomjovo ilingana nokucindezela kwe-mold cavity, kodwa ukucindezela kwangempela kwe-mold cavity ayikwazi ukubalwa.Uma ukugcwaliswa kwesikhunta kunzima kakhulu, ingcindezi yomjovo inkulu, futhi ubude bokuncibilika buba kude.Ingcindezi yomjovo iyancipha ngokukhula kokumelana nokugcwalisa.Ngakho-ke, umjovo we-multistage wethulwa.Ingcindezi yomjovo we-front melt iphansi, ingcindezi yomjovo we-middle melt iphezulu, futhi ingcindezi yomjovo wengxenye yokugcina iphansi.Indawo esheshayo iyashesha futhi indawo enensa ihamba kancane, futhi imingcele yenqubo idinga ukuthuthukiswa ngemva kokukhiqiza okuzinzile.
>> Izinyathelo zokuphepha zokukhetha ingcindezi yomjovo:
1. Ngesikhathi sokulungiswa kwepharamitha, lapho izinga lokushisa lesikhunta noma izinga lokushisa lokugcina liyancipha, kuyadingeka ukusetha ukucindezela okukhulu komjovo.
2. Ukuze uthole izinto ezinoketshezi oluhle, ukucindezela komjovo ophansi kufanele kusetshenziswe;Ngezinto ezingilazi neziphezulu ze-viscosity, kungcono ukusebenzisa ingcindezi enkulu yomjovo.
3. Uma umkhiqizo uba mncane, inqubo iba yinde, futhi uma ukwakheka kuyinkimbinkimbi, kukhulu ukucindezela komjovo osetshenziswayo, okuvumela ukugcwalisa nokubumba.
4. Izinga le-scrap lomkhiqizo lihlobene ngokuqondile nokuthi ingcindezi yomjovo isethwe ngokufanelekile yini.Isisekelo sokuzinza siwukuthi izinto zokubumba ziqinile futhi azinawo amaphutha afihliwe.
Isikhathi sokuthumela: Dec-09-2022