"I-Dent" ibangelwa ukuncipha kwangaphakathi kwendawo ngemva kokuvalwa kwesango noma ukuntuleka komjovo wezinto ezibonakalayo.Ukucindezeleka noma ukucindezeleka okuncane ebusweni beizingxenye ezibunjiwe ngomjovoinkinga endala kunqubo yokubumba umjovo.
Amazinyo ngokuvamile abangelwa ukwanda kwendawo kwezinga lokushwabana kwemikhiqizo yepulasitiki ngenxa yokwanda kodonga lwemikhiqizo yepulasitiki.Angase avele eduze namakhona acijile angaphandle noma ekushintsheni okungazelelwe kokuqina kodonga, njengangemuva kwamaqhubu, ama-stiffener noma ama-bearings, futhi ngezinye izikhathi kwezinye izingxenye ezingajwayelekile.Imbangela yamazinyo ukunwebeka okushisayo kanye nokufinyela okubandayo kwezinto, ngoba i-thermo-expansion coefficient ye-thermoplastics iphezulu kakhulu.
Izinga lokunwetshwa nokunciphisa lincike ezintweni eziningi, phakathi kwazo ukusebenza kwamapulasitiki, amazinga okushisa aphezulu kanye nobuncane kanye nokucindezela kokugcina ukucindezela kwe-mold cavity yizici ezibaluleke kakhulu.Usayizi nokuma kweizingxenye zepulasitiki, kanye nesivinini sokupholisa kanye nokufana nakho kuyizici ezinomthelela.
Inani lokunwetshwa nokuncipha kwezinto zepulasitiki enqubweni yokubumba lihlobene ne-coefficient yokwandisa ukushisa kwepulasitiki ecutshunguliwe.I-coefficient yokwandisa okushisayo enqubweni yokubumba ibizwa ngokuthi "ukuncipha kokubumba".Ngokuncipha kokupholisa kwengxenye ebunjiwe, ingxenye ebunjiwe ilahlekelwa ukuthintana eduze nendawo yokupholisa yesikhunta.Ngalesi sikhathi, ukusebenza kahle kokupholisa kuyancipha.Ngemva kokuba ingxenye ebunjiwe iqhubeka nokuphola, ingxenye ebunjiwe iyaqhubeka nokuncipha.Inani le-shrinkage lincike kumphumela ohlangene wezici ezihlukahlukene.
Amakhona acijile engxenyeni ebunjiwe apholisa ngokushesha futhi aqina ngaphambi kwesikhathi kunezinye izingxenye.Ingxenye ewugqinsi eseduze nendawo emaphakathi yengxenye ebunjiwe iqhelelene kakhulu nendawo yokupholisa yomgodi futhi iba yingxenye yokugcina yengxenye ebunjiwe ukukhulula ukushisa.Ngemva kokuba izinto ezisemakhoneni zelashiwe, ingxenye ebunjiwe izoqhubeka nokuncipha njengoba ukuncibilika eduze nendawo ephakathi kwengxenye kuphola.Indiza ephakathi kwamakhona acijile ingapholiswa kuphela ngokuhlangene, futhi amandla ayo awaphezulu njengalawo ezinto ezisemakhoneni abukhali.
Ukuncipha kokupholisa kwento yepulasitiki phakathi nendawo kudonsa indawo ebuthakathaka uma kuqhathaniswa phakathi kokuphole kancane kanye nekhona elicijile elinedigri enkulu yokupholisa ngaphakathi.Ngale ndlela, i-dent ikhiqizwa ebusweni bengxenye ebunjiwe yomjovo.
Ukuba khona kwamazinyo kubonisa ukuthi ukuncipha kokubumba lapha kuphakeme kunokuncipha kwezingxenye ezizungezile.Uma ukuncipha kwengxenye ebunjiwe endaweni eyodwa kuphakeme kunaleyo kwenye indawo, khona-ke isizathu se-warpage yengxenye ebunjiwe.Ukucindezeleka okusele ekubunjeni kuzonciphisa amandla omthelela nokumelana nokushisa kwezingxenye ezibunjiwe.
Kwezinye izimo, ukubola kungagwenywa ngokulungisa izimo zenqubo.Isibonelo, phakathi nenqubo yokugcinwa kwengcindezi yengxenye ebunjiwe, impahla yepulasitiki eyengeziwe ijovwa emgodini wesikhunta ukuze kunxeshezelwe ukuncipha kokubumba.Ezimweni eziningi, isango lincane kakhulu kunezinye izingxenye zengxenye.Lapho ingxenye ebunjiwe isashisa kakhulu futhi iqhubeka nokuncipha, isango elincane liye laphulukiswa.Ngemuva kokuphulukisa, ukugcinwa kwengcindezi akunawo umthelela engxenyeni ebunjiwe emgodini.
Isikhathi sokuthumela: Nov-15-2022