Yiziphi izinyathelo zokuphepha zokucubungula izinto zokusetshenziswa ze-PC zibe yimikhiqizo eqediwe?
Yimiphi imikhiqizo ehlangabezana nezidingo zamakhasimende futhi igqamise ukuncintisana komkhiqizo wethu? Senze ucwaningo kumapulatifomu aku-inthanethi futhi sathola ukuthi imikhiqizo ecutshungulwe nge-PC idume kakhulu, njengama-sun visor, amabhodi e-basketball, izibani zezibani, izihlangu, nokunye.
Ukukhiqizwa komkhiqizo ikakhulukazi kuncike ekubumbeni. Uma nje isikhunta siklanyelwe, isitayela esifunwayo somkhiqizo sanele. Kodwa okubuhlungu kakhulu enqubweni yokukhiqiza ukuthi ukucubungula kudinga ukunakwa kwemininingwane eminingi, ngaphandle kwalokho imikhiqizo ekhiqizwayo izokhubazeka noma ingahlangabezani namazinga esiwafunayo. Ngakho-ke, yimiphi imininingwane okudingeka siyinake ohlelweni lokukhiqiza? Sifingqe izinto eziyishumi eziphezulu.
Inothi lokuqala: Izinto zokusetshenziswa ezomile
Amapulasitiki e-PC, noma evezwe emazingeni aphansi kakhulu omswakamo, angangena ku-hydrolysis ukuze aphule izibopho, ehlise isisindo samangqamuzana, futhi ehlise amandla omzimba. Ngakho-ke, ngaphambi kwenqubo yokubumba, umswakama we-polycarbonate kufanele ulawulwe ngokuqinile ukuze ube ngaphansi kuka-0.02%.
Inothi lesibili: Izinga lokushisa lomjovo
Ngokuvamile, izinga lokushisa phakathi 270 ~320 ℃ ikhethiwe ukubunjwa. Uma izinga lokushisa lempahla lidlula 340 ℃ , I-PC izobola, umbala womkhiqizo uzoba mnyama, futhi amaphutha afana nezintambo zesiliva, imigqa emnyama, amabala amnyama, namabhamuza azovela phezulu. Ngesikhathi esifanayo, izakhiwo zomzimba nezemishini nazo zizokwehla kakhulu.
Inothi lesithathu: Ingcindezi yomjovo
Izakhiwo zomzimba nezomshini, ingcindezi yangaphakathi, kanye nokuncipha kokubumba kwemikhiqizo ye-PC kunomthelela othile ekubukekeni kwayo nasezimpahleni zokubhidliza. Ukucindezela komjovo ophansi kakhulu noma okuphezulu kakhulu kungabangela ukukhubazeka okuthile emikhiqizweni. Ngokuvamile, ingcindezi yomjovo ilawulwa phakathi kuka-80-120MPa.
Inothi lesine: Ukubamba ingcindezi kanye nesikhathi sokubamba
Ubukhulu bengcindezi yokubamba kanye nobude besikhathi sokubamba kunomthelela omkhulu ekucindezelekeni kwangaphakathi kwemikhiqizo ye-PC. Uma ingcindezi iphansi kakhulu futhi umphumela wokuncipha umncane, amabhamuza evacuum noma ama-indentation angaphezulu angenzeka. Uma ingcindezi iphezulu kakhulu, ingcindezi enkulu yangaphakathi ingase yenziwe eduze kwe-sprue. Ekucubunguleni okusebenzayo, izinga lokushisa eliphezulu lezinto ezibonakalayo kanye nokucindezela okuphansi okubambayo kuvame ukusetshenziselwa ukuxazulula le nkinga.
Inothi lesihlanu: Isivinini sokujova
Awukho umthelela obalulekile ekusebenzeni kwemikhiqizo ye-PC, ngaphandle kwezindonga ezincane, isango elincane, imbobo ejulile, nemikhiqizo yenqubo ende. Ngokuvamile, kusetshenziswa ukucubungula isivinini esimaphakathi noma esinensayo, futhi umjovo wezigaba eziningi uyathandwa, ngokuvamile kusetshenziswa indlela yokujova enezigaba eziningi enensayo esheshayo.
Inothi lesithupha: Izinga lokushisa lesikhunta
85~120 ℃ , ngokuvamile ilawulwa ku-80-100 ℃ . Ngemikhiqizo enobumo obuyinkimbinkimbi, ukujiya okuncane, nezidingo eziphakeme, inganyuswa futhi ibe ngu-100-120 ℃ , kodwa ayikwazi ukudlula izinga lokushisa elishisayo le-deformation yesikhunta.
Inothi lesikhombisa: Isivinini se-screw kanye nokucindezela emuva
Ngenxa ye-viscosity ephezulu yokuncibilika kwe-PC, kuyazuzisa ukwenza ipulasitiki, ukukhipha, nokugcinwa komshini we-plasticizing ukuvimbela umthwalo omningi wezikulufu. Isidingo sejubane lesikulufa akufanele sibe phezulu kakhulu, ngokuvamile silawulwa ku-30-60r/min, futhi ukucindezela kwangemuva kufanele kulawulwe phakathi kuka-10-15% wengcindezi yomjovo.
Inothi lesishiyagalombili: Ukusetshenziswa kwezithasiselo
Ngesikhathi sokubumba umjovo we-PC, ukusetshenziswa kwama-ejenti okukhululwa kufanele kulawulwe ngokuqinile, futhi ukusetshenziswa kwezinto ezigaywe kabusha akufanele kudlule izikhathi ezintathu, ngesilinganiso sokusebenzisa cishe esingama-20%.
Inothi lesishiyagalolunye: Ukubumba komjovo we-PC kunezidingo eziphezulu zokubunjwa:
Dizayina amashaneli awugqinsi futhi amafushane ngangokunokwenzeka, anokugoba okuncane, futhi usebenzise amashaneli ayindilinga ahlukanisayo kanye nokugaya kwesiteshi nokupholishwa ukuze unciphise ukumelana nokugeleza kwento encibilikisiwe. Isango lomjovo lingasebenzisa noma yiluphi uhlobo lwesango, kodwa ububanzi bezinga lokungena kwamanzi akufanele libe ngaphansi kuka-1.5mm.
Inothi leshumi: Izidingo zemishini yepulasitiki esetshenziswa ekukhiqizeni imikhiqizo ye-PC:
Umthamo omkhulu womjovo womkhiqizo akufanele udlule u-70-80% wevolumu yomjovo ojwayelekile; Ingcindezi yokucindezela isukela ku-0.47 kuya ku-0.78 amathani ngesentimitha yesikwele yendawo ehlongoziwe yomkhiqizo oqediwe; Usayizi olungile womshini cishe u-40 kuya ku-60% womthamo womshini wokubumba umjovo ngokusekelwe esisindweni somkhiqizo ophelile. Ubude obuncane besikulufu kufanele bube ngamadayamitha angu-15 ubude, nesilinganiso se-L/D esingu-20:1 sibe esifanele.
Ukucubungula okunengqondo nokusebenzayo kuyadingeka ukuze kwandiswe ukusebenza kahle komkhiqizo ophelile. Nikeza amakhasimende ngezinketho eziningi.