Ngohlelo lweimishinikanye nokukhiqizwa kokubumba umjovo, kuwuhlelo oludidiyelwe, olungenakuhlukaniswa.
Ekubumbeni umjovo, isistimu yokugenca ibhekisela engxenyeni yomgijimi ngaphambi kokuba ipulasitiki ingene emgodini isuka emlonyeni, okuhlanganisa umgijimi oyinhloko, umgodi wezinto ezibandayo, umgijimi nesango, njll.
Isistimu yokuthela nayo ibizwa ngokuthi i-runner system. Kuyisethi yamashaneli okuphakelayo ahola incibiliko yepulasitiki isuka emlonyeni womshini womjovo iye emgodini. Ngokuvamile iqukethe umgijimi oyinhloko, umgijimi, isango kanye nomgodi wezinto ezibandayo. Ihlobene ngokuqondile nekhwalithi yokubumba nokusebenza kahle kokukhiqiza kwemikhiqizo yepulasitiki.
I-Injection Mold Main Road:
Kuyiphaseji esikhunjeni esixhuma umlomo wombhobho womshini wokubumba umjovo kumgijimi noma umgodi. Ingaphezulu le-sprue li-concave ukuze lixhumane nombhobho. Ububanzi bokungena komgijimi oyinhloko kufanele bube kukhudlwana kunobubanzi bomlomo wombhobho (0.8mm) ukuze kugwenywe ukuchichima futhi kuvimbele kokubili ukuvinjwa ngenxa yokuxhumeka okungalungile. Ububanzi be-inlet buncike kusayizi womkhiqizo, ngokuvamile 4-8mm. Ububanzi bomgijimi oyinhloko kufanele bunwetshwe ngaphakathi nge-engeli engu-3° ukuya ku-5° ukuze kube lula ukudilizwa komgijimi.
I-Cold Slug:
Kuwumgodi ekugcineni komgijimi oyinhloko ukucupha into ebandayo ekhiqizwe phakathi kwemijovo emibili ekugcineni komlomo ukuvimbela ukuvaleka komgijimi noma isango. Uma izinto ezibandayo sezixubene emgodini, ukucindezeleka kwangaphakathi kungenzeka kumkhiqizo owenziwe. Ububanzi bomgodi we-slug obandayo bungaba ngu-8-10mm futhi ukujula kungu-6mm. Ukuze kube lula ukudiliza, phansi kuvame ukuthwala induku yokudiliza. Ingaphezulu lenduku yokuhlubula kufanele iklanywe ngendlela ye-hook ye-zigzag noma isethwe nge-groove ehlanganisiwe, ukuze i-sprue ikhishwe kahle ngesikhathi sokudilizwa.
Shunt:
Yisiteshi esixhuma umzila oyinhloko kanye nomgodi ngamunye kusikhunta se-slot multi-slot. Ukuze wenze ukuncibilika kugcwalise ama-cavities ngesivinini esifanayo, ukuhlelwa kwabagijimi kusikhunta kufanele kube yi-symmetrical and equidistant. Ukuma nobukhulu be-cross-section yomgijimi kunomthelela ekuhambeni kokuncibilika kwepulasitiki, ukudilizwa komkhiqizo kanye nobunzima bokukhiqiza isikhunta. Uma kusetshenziswe ukugeleza kwenani elifanayo lezinto ezibonakalayo, ukumelana kwesiteshi sokugeleza nge-circular cross-section kuncane kakhulu. Kodwa-ke, ngenxa yokuthi indawo ethile yomgijimi we-cylindrical incane, akufanelekile ukupholisa umgijimi ongasasebenzi, futhi umgijimi kufanele avulwe kuma-halves amabili esikhunta, okuwumsebenzi onzima futhi onzima ukuwuqondanisa. Ngakho-ke, abagijimi be-trapezoidal noma i-semicircular cross-section bavame ukusetshenziswa, futhi bavulwa engxenyeni yesikhunta ngenduku yokuhlubula. Indawo yomgijimi kufanele iphuculwe ukuze kuncishiswe ukumelana nokugeleza futhi inikeze isivinini sokugcwalisa ngokushesha. Ubukhulu bomgijimi buncike ohlotsheni lwepulasitiki, ubukhulu nobukhulu bomkhiqizo.
Kuma-thermoplastics amaningi, ububanzi be-cross-section of the runners abudluli u-8mm, ama-extra-large angafinyelela ku-10-12mm, kanti amancane-amancane angu-2-3mm. Esimweni sokuhlangabezana nezidingo, indawo ephambanayo kufanele incishiswe ngangokunokwenzeka ukuze kwandiswe imfucumfucu yomgijimi futhi yandise isikhathi sokupholisa.
Isikhathi sokuthumela: Sep-13-2021