Izindlela ezikhethekile zokubumba umjovo wepulasitiki ziyachazwa kusukela kulesi sifundo. Okokuqala, kulesi sifundo sichaza indlela yokubumba umjovo wemibala emibili.
Indlela yokubumba umjovo wemibala emibili iyindlela yokubumba esanda kubizwa ngokuthi "indlela yokubumba umjovo wezinto ezimbili" noma "indlela yokubumba umjovo wezinto ezihlukile", njll. Izinhlobo ezimbili zenhlaka ye-thermoplastic zijova ngokulandelana esikhunjini ngokuhluka ngokulandelana kwazo. amasilinda omjovo, ngaleyo ndlela akhiqize umkhiqizo onezinhlobo ezimbili zemibala.
Lobu ubuchwepheshe bokubumba obusetshenziswa kabanzi ekulungiseni iziqongo eziyisihluthulelo zamakhompiyutha edeskithophu aphezulu, noma izinkinobho ezikhanyisiwe zamayunithi okuzulazula emoto, njll.
Ngokuvamile, kubonakala sengathi imvamisa kusetshenziswa inhlaka yepulasitiki emibili yohlobo olufanayo njengepulasitiki ye-PS noma ipulasitiki ye-ABS. Lokhu kungenxa yokuthi kukhona ukunamathela okuhle kakhulu phakathi kwezinto ezimbili ezibunjiwe. Nakuba kungenzeka ukukhiqiza imikhiqizo ebunjiwe evela ezinhlotsheni ezimbili ezihlukene ze-plastiki resin njenge-ABS ne-POM, ukunamathela phakathi kwabo akulungile ngempela. (Kunezinhlelo zokusebenza ezihlukene lapho ukunamathela kuhle futhi lapho ukunamathela kungalungile.)
Ngaphezu kwalokho, muva nje kunezinhlanganisela eziyingqayizivele eziye zabonakala njengenhlanganisela yezinto zepulasitiki ezishisayo ne-thermoplastic elastomer (i-raber-like plastic resin). (Izimpahla zezemidlalo, njll.)
Ukuze usebenzise indlela yokubumba umjovo wemibala emibili, imvamisa, umshini wokubumba okhethekile uzodingeka. Imishini enjalo yenziwa abakhiqizi bemishini yokubumba imijovo eJapane nasemazweni anjengeSwitzerland neJalimane. Umshini wokubumba umjovo ufakwe amayunithi amabili omjovo, ngokulandelana kwawo athululela into encibilikisiwe ngaphakathi kwembobo yesikhunta ngokusebenzisa ama-sprues awo.
Esikhunjeni, ingxenye yesifazane ye-cavity yakheka ohlangothini olungaguquki lwempahla yepulasitiki efanele.
Ngakolunye uhlangothi, ama-cores amabili abesilisa asesimweni esifanayo akhiwa engxenyeni ehambayo, futhi isikhala phakathi kwezingxenye zesilisa singanyakaziswa umshini ojikelezayo noma umshini wokushelela. (Kunezinhlobo eziningana zamaphethini alesi sakhiwo.)
Ngendlela emibili yokubumba umjovo wombala, njengoba umkhiqizo omuhle owenziwe ngezinto eziningi ungakhiqizwa ngesinyathelo esisodwa, kungenzeka ukukhiqiza into ebunjiwe enenani eliphakeme. Kungenzeka futhi ukuba nemigodi eminingi ekudutshulweni okukodwa esimweni sezinto ezibunjiwe ezinosayizi omncane.
Kodwa-ke, ukuklama kwesikhunta kudinga ulwazi mayelana nokuklanywa kobukhulu bodonga kanye nolwazi mayelana nokuhlangana phakathi kwezinto ezihlukahlukene zepulasitiki. Amanye amasu azodingeka mayelana nokulawulwa kwezinga lokushisa kwesikhunta futhi.
Isikhathi sokuthumela: Jul-14-2022
