Inqubo yokubumba yomjovo yezingxenye zepulasitiki ikakhulukazi ifaka izigaba ezine, njengokugcwalisa - ingcindezi - ukupholisa - ukudiliza - okukuthola ngokuqondile ikhwalithi yokubumba yomkhiqizo, futhi lezi zigaba ezine ziyinqubo ephelele eqhubekayo.
1.Ukugcwaliswa kwesiteji kuyisinyathelo sokuqala kwinqubo yonke yomjovo womjovo, isikhathi sibalwa kusuka ekuvaleni isikhunta esiya ku-mold cavity ukugcwalisa cishe ama-95%. Emthiyori, okufushane isikhathi sokugcwalisa, ukukhuphuka kahle kokubumba, kepha ekusebenzeni, isikhathi sokubumba noma isivinini sokuhlobisa silinganiselwe ngezimo eziningi. Izinga le-Shear liphezulu ngesikhathi sokugcwaliswa ngejubane eliphezulu kanye nokugcwaliswa ngejubane eliphezulu, kanye nokubonakaliswa kwepulasitiki kuyancipha ngenxa yomphumela wokuncipha kokugeleza, okunciphisa ukuhanjiswa okuphelele kokugeleza; Imiphumela yokushisa ye-viscous yasendaweni nayo ingancipha ubukhulu besendlalelo eselekele. Ngakho-ke, ngesikhathi sesigaba sokulawula ukugeleza, isimilo sokugcwalisa kwesinye isikhathi sincike ngosayizi wevolumu elizogcwaliswa. Okusho ukuthi, esigabeni sokuLawula Ukugeleza, ngenxa yokugcwaliswa ngejubane eliphezulu, umphumela wokuncipha we-shear wokuncibilika uvame ukuba mkhulu, ngenkathi umphumela opholile wodonga oluncane awubonakali, ngakho-ke ukusetshenziswa kwezinga elithambile akubonakali. Ukulawulwa kokushisa okusheshayo okusheshayo lapho ukugcwaliswa kwejubane eliphansi kulawulwa, izinga le-shear liphansi, ukubonakala kwendawo kuphakeme, futhi ukumelana nokugeleza kukhulu. Ngenxa yezinga lokugcwaliswa kabusha okuhamba kancane kanye nokugeleza okuhamba kancane kwama-thermoplastics, umphumela wokushisa okushisa kusobala, futhi ukushisa kuyasuswa ngokushesha ngodonga lwamakhaza. Kuhlanganiswe nenani elincane lokushisa kwe-viscous, ubukhulu besendlalelo eselekelekile bukhulu, okubuye kwandise ukumelana nokugeleza ezindongeni ezincanyana. Ngenxa yokugeleza komthombo, i-polymer chain yepulasitiki phambi kwegagasi lokugeleza lihlelwe phambi kwegagasi elicishe libe lifana. Ngakho-ke, lapho imicu emibili yepulasitiki incibilika ihlangana, amaketanga e-polymer endaweni yokuxhumana ayafana omunye nomunye; Ngaphezu kwalokho, imichilo emibili yokuncibilika inezakhiwo ezihlukile (isikhathi esihlukile sokuhlala emgodini wokudala, izinga lokushisa elihlukile nengcindezelo), okuholela ekusebenzeni okuhle kwesakhiwo endaweni yokuhlangana. Lapho izingxenye zibekwa engela elifanele ngaphansi kokukhanya futhi zibonwa ngeso elinqunu, zingatholakala ukuthi kunemigqa ehlanganyelwe ehlanganyelwe, okuyindlela yokwakheka komugqa we-welding. Umugqa we-welding awunakuthinta kuphela ukubukeka kwengxenye yepulasitiki, kepha futhi kubangela ukugxila kwengcindezelo ngenxa ye-misftructure evulekile, enciphisa amandla engxenye nokuqhekeka.
Ngokuvamile, amandla omugqa we-welding akhiqizwa endaweni ephezulu yokushisa engcono, ngoba ngaphansi kwesimo sokushisa esiphakeme, i-polymer chain state, ngaphezu kwalokho, izindawo zokushisa zobabili zingangena ngokufanayo, futhi kwandisa amandla we-welding ndawo; Ngakolunye uhlangothi, endaweni yokushisa ephansi, amandla we-welding ampofu.
2.Umsebenzi wesiteji sokubamba ukuqhubeka usebenzise ingcindezi, uhlanganise ukuncibilika, futhi wandise ukuncipha (ukucaciswa) kwepulasitiki ukunxephezela ngokuziphatha kwepulasitiki. Ngesikhathi senqubo yokubamba, ingcindezi engemuva iphakeme ngoba i-cavetha yokubumba isivele igcwele ngopulasitiki. Enqubweni yokubamba iqhaza, isikulufa somshini wokuhlanganisa umjovo singaqhubekela phambili kancane kancane kancane, futhi ijubane lokugeleza kwepulasitiki futhi lihamba kancane, futhi ukugeleza ngalesi sikhathi kubizwa ngokuthi ukugeleza okugcwele. Njengoba ipulasitiki selipholile futhi laphulukiswa ngokushesha ngodonga lokubumba ngesikhathi sokubamba, futhi i-viscosity encibilikayo inyuka ngokushesha, ukumelana nomgodi wokudala kukhulu kakhulu. Esigabeni sakamuva sokupakisha, ukuqina kwezinto ezibonakalayo kuyaqhubeka ukwanda, kancane kancane izingxenye zepulasitiki zakhiwa kancane kancane, futhi indawo ebambekayo iyaqhubeka kuze kube yilapho isango licindezelwa futhi livaliwe, ngaleso sikhathi umfutho we-mold cavity esigabeni esiphakeme.
Esigabeni sokupakisha, imibukiso epulasitiki ekhombisa izakhiwo ezixakile ngenxa yokucindezela okukhulu. Ezindaweni ezinezingcindezi eziphakeme, amapulasitiki angama-denser kanye naxer; Ezindaweni ezinezingcindezi eziphansi, amapulasitiki ayakhululeka futhi aminyene, okwenza ukusatshalaliswa kobunzima kushintshe nendawo nesikhathi. Izinga lokugeleza kwepulasitiki ngesikhathi sokubamba liphansi kakhulu, futhi ukugeleza akusekho kudlala indima enkulu; Ingcindezi isici esiyinhloko esithinta inqubo yokubamba. Ngesikhathi senqubo yokubamba, ipulasitiki igcwalise umthambo wobumba, futhi ukuncibilika kancane kancane kusebenza njengendlela yokuhambisa ingcindezi. Ingcindezi engxenyeni ye-mold idluliselwa ebusweni bodonga lokubumba ngosizo lwepulasitiki, oluthambisa ukuvula isikhunta, ngakho-ke amandla afanele asondelana adingekayo ukuze aqalene. Ngaphansi kwezimo ezijwayelekile, amandla okwandisa isikhunta azokwelula kancane isikhunta, esisiza ekuqedeni isikhunta; Kodwa-ke, uma amandla okwandisa isikhunta makhulu kakhulu, kulula ukudala i-burr yomkhiqizo obunjiwe, ukuchichima, futhi uvule isibungu.
Ngakho-ke, lapho ukhetha umshini wokubumba umjovo, umshini wokubumba umjovo onamandla amakhulu ancenganela amabutho kufanele akhethwe ukuvikela ukwanda kwami futhi alondoloze ngempumelelo ingcindezi.
3.Isiteji sokupholisa emjovo wokubumba isikhunta, ukwakheka kohlelo lokupholisa kubaluleke kakhulu. Lokhu kungenxa yokuthi imikhiqizo epulasitiki ebunjiwe ingaphola kuphela futhi yelapheke ekuqinisekeni okuthile, nangemva kokuhlubuka, imikhiqizo yepulasitiki ingagwenywa ekuguqukeni ngenxa yamabutho angaphandle. Njengoba isikhathi sokupholisa sibalwa cishe ama-70% ~ 80% omjikelezo wonke wokubumba, uhlelo lokupholisa oluklanywe kahle lunganciphisa kakhulu isikhathi sokubumba, sithuthukise umkhiqizo wokubumba, futhi unciphise izindleko. Uhlelo oluklanywe ngokungafanele luzokhulisa isikhathi sokubumba futhi sandise izindleko; Ukupholisa okungalingani kuzobe kudala ukwehla kanye nokuguqulwa kwemikhiqizo yepulasitiki. Ngokokuhlola, ukushisa okufaka isikhunta kusuka kuncibilike kuhlukaniswe ngezingxenye ezimbili, ingxenye eyodwa idluliselwe ku-5%, kanti ama-95% asele aqhutshwa ekubumbeni. Ngenxa yeqhaza lepayipi lamanzi elipholile esikhunjini, ukushisa kudluliswa kusuka epulasitiki kupayipi elibunjiwe kuya epayipi lamanzi elipholile ngokusebenzisa isisekelo sokushisa, bese kususwa yi-coolant nge-convection yokushisa. Inani elincane lokushisa elingathathwa ngamanzi apholile liyaqhubeka nokuqhutshwa kulokhu kuze kube yilapho lihlangana nomhlaba wangaphandle futhi lihlakazeka emoyeni.
Umjikelezo wokubumba wokuhlanganiswa kokubumba uqukethe isikhathi sokubamba isikhunta, isikhathi sokugcwalisa, isikhathi sokubamba, isikhathi sokupholisa nesikhathi sokukhulula. Phakathi kwazo, ingxenye yesikhathi sokupholisa inkulu kakhulu kunazo zonke, cishe ngo-70% ~ 80%. Ngakho-ke, isikhathi esipholile sizothinta ngqo ubude bomjikelezo wokubumba kanye nokukhishwa kwemikhiqizo yepulasitiki. Izinga lokushisa lemikhiqizo yepulasitiki esigabeni sokudumala kufanele liphonswe ngaphansi kwezinga lokushisa eliphansi kunamazinga okushisa okushisa okushisa imikhiqizo yepulasitiki ukuvikela ukucindezelwa kwesakhiwo okubangelwa ukucindezelwa kwensalela noma ukwehla kwangaphandle okubangelwa yimikhiqizo yepulasitiki.
Izici ezithinta izinga lokupholisa lemikhiqizo yile: Design Product Design.
Ikakhulukazi ubukhulu bepulasitiki. Uma kukhulu ubukhulu bomkhiqizo, isikhathi eside isikhathi esipholile. Ngokuvamile, isikhathi sokupholisa cishe silingana nesikwele sobukhulu bemikhiqizo yepulasitiki, noma amandla we-1.6 we-runner enkulu. Okungukuthi, ubukhulu bemikhiqizo yepulasitiki buphindwe kabili kabili, futhi isikhathi sokupholisa sikhuphuka ngamahlandla ama-4.
Indwangu yokubumba nendlela yayo yokupholisa.Izinto zokwakha, kubandakanya isikhunta, impahla ye-cavity, kanye nezinto zokwakha isisekelo, zinethonya elikhulu kumanani apholile. Lapho kuphakama okuvuselelwayo kwento yokubumba, okungcono ukudluliswa kokushisa kusuka epulasitiki ngesikhathi esisodwa se-unit kanye nesikhathi esifushane. Ukulungiswa kwamapayipi amanzi okupholisa.Ipayipi lamanzi elipholile liya emgodini womuntu, likhudlwana ububanzi bepayipi futhi likhule inani lenombolo, lingcono umphumela wokupholisa kanye nemfushane isikhathi sokupholisa. Ukugeleza okupholile.Uma kukhula izinga lokugeleza kwamanzi elipholile (ngokuvamile kungcono ukufezekisa isiphithiphithi), okungcono amanzi apholile asusa ukushisa ngokushisa okushisa. Uhlobo lokuphola. I-viscosity kanye nokuvuselelwa okushisayo kwe-coolount kuthinta nomphumela wokudlulisa ukushisa kwesikhunta. Ukwehlisa ukubonakala okupholile, kukhuphuka kakhulu ukuqina okushisayo, kwehlise izinga lokushisa, futhi kube ngcono umphumela wokupholisa. Ukukhetha kwepulasitiki.Ipulasitiki isho isilinganiso esithile sejubane lapho kusebenza khona ipulasitiki endaweni eshisayo eya endaweni ebandayo. Lapho kukhuphuka kakhulu amapulasitiki, okungcono komphumela wokushisa okushisa, noma ukushisa okuthile kwamapulasitiki kuphansi, futhi okushisa kulula ukukuphunyuka, ngakho-ke ukushisa kulula ukuphunyula, futhi umphumela wokushisa wokushisa ungcono, futhi isikhathi esipholile esidingekayo simfushane. Ukucubungula ukuhlelwa kwepharamitha. Ukushisa okuphezulu kokudla, ukukhuphuka kokushisa okubumba, okunciphisa izinga lokushisa le-Ejection, futhi isikhathi eside lapho kudingeka isikhathi esipholile. Imithetho Design yezinhlelo zokupholisa:Isiteshi esipholile kufanele senzelwe ukuqinisekisa ukuthi umphumela wokupholisa umfaniswano futhi ushesha. Uhlelo lokupholisa lwenzelwe ukugcina ukupholisa okufanelekile nokusebenzayo kwesikhunta. Izimbobo ezipholile kufanele zibe ngosayizi ojwayelekile ukwenza lula ukucubungula kanye noMkhandlu. Lapho uklama uhlelo lokupholisa, umklami oyindi wolwazi kufanele anqume amapharamitha alandelayo ngokwakhiwa kodonga kanye nevolumu yomgodi weplastiki, ubude bomgodi, uhlobo lokushisa kanye nokushisa okushisayo kanye nokushisa okushisayo kwezakhiwo ze-coolant.
4.Dolding Inst Funding isixhumanisi sokugcina kumjikelezo wokubumba umjovo. Yize lo mkhiqizo ubelokhu ebekiwe, kepha ukubanjwa kwabantu kuseba nomthelela obaluleke kakhulu kwikhwalithi yomkhiqizo, indlela engafanele yokudumba amandla kungaholela ekuthini ungalingani umkhiqizo ngesikhathi sokudilizwa, futhi kubangele ukuguquguquka komkhiqizo nezinye izikhali lapho ukhipha. Kunezindlela ezimbili eziyinhloko zokudilizwa: I-Ejector Bar Demoulding kanye nokukhipha ipuleti yepuleti. Lapho uklama isikhunta, kuyadingeka ukuthi ukhethe indlela efanelekile yokumbamba ngokuya ngezimpawu zokwakheka komkhiqizo ukuze uqinisekise ikhwalithi yomkhiqizo.
Isikhathi sePosi: Jan-30-2023