Umshini wokufutha ibhodlela umshini ongaqhumisa ama-preforms aphelile emabhodleleni ngokusebenzisa izindlela ezithile zobuchwepheshe. Njengamanje, imishini eminingi yokubumba i- blowing isebenzisa indlela yokuphefumula enezinyathelo ezimbili, okungukuthi, ukushisa kuqala - ukubunjwa kwe-blow.
1. Ukushisa kuqala
I-preform ikhishwa ngesibani sokushisa esiphezulu ukushisa futhi ithambisa umzimba we-preform. Ukuze ugcine ukuma komlomo webhodlela, umlomo we-preform awudingi ukushiswa, ngakho-ke idivayisi ethile yokupholisa iyadingeka ukuze upholise.
2. Vuthela ukubumba
Lesi sigaba siwukubeka i-preheated preform esikhunjini esilungisiwe, usifake ngomfutho ophezulu, bese ushaya i-preform ebhodleleni oyifunayo.
Inqubo yokubumba i-blow iyindlela yokwelula enezindlela ezimbili, lapho amaketanga e-PET enwetshwa, aqondiswe futhi aqondaniswe kuzo zombili izinkomba, ngaleyo ndlela kwandise izakhiwo zemishini yodonga lwamabhodlela, kuthuthukiswe ukushuba, ukuqina, namandla okuthinta, futhi ukusebenza okuphezulu kakhulu. Ukuqina komoya okuhle. Nakuba ukwelula kusiza ukuthuthukisa amandla, akufanele kwelulwe kakhulu. I-stretch-blow ratio kufanele ilawulwe kahle: isiqondiso se-radial akufanele sidlule i-3.5 kuya ku-4.2, futhi isiqondiso se-axial akufanele sidlule i-2.8 kuya ku-3.1. Ubukhulu bodonga lwe-preform akufanele budlule u-4.5mm.
Ukuvuthela kwenziwa phakathi kwezinga lokushisa lokushintsha kwengilazi kanye nezinga lokushisa le-crystallization, ngokuvamile elilawulwa phakathi kuka-90 no-120 degrees. Kulolu hlu, i-PET ikhombisa ukunwebeka okuphezulu, futhi iba ibhodlela elisobala ngemuva kokubunjwa kokushaywa ngokushesha, ukupholisa nokusetha. Ngendlela yesinyathelo esisodwa, lokhu kushisa kunqunywa isikhathi sokupholisa enqubweni yokubumba umjovo (njengomshini wokubumba i-Aoki blow), ngakho ubudlelwano phakathi komjovo neziteshi zokufutha kufanele buxhumeke kahle.
Enqubweni yokubumba igalelo, kukhona: ukwelula—igalelo elilodwa—amagalelo amabili. Izenzo ezintathu zithatha isikhathi esifushane kakhulu, kodwa kufanele zihlanganiswe kahle, ikakhulukazi izinyathelo ezimbili zokuqala zinquma ukusatshalaliswa okuphelele kwempahla kanye nekhwalithi yokufutha. Ngakho-ke, kuyadingeka ukulungisa: isikhathi sokuqala sokwelula, isivinini sokwelula, isikhathi sokuqala nesiphetho sokushaywa kwangaphambili, ukucindezela kwangaphambili, izinga lokugeleza kwangaphambili, njll. Uma kungenzeka, ukusatshalaliswa kwezinga lokushisa jikelele. ye-preform ingalawulwa. I-gradient yezinga lokushisa lodonga lwangaphandle. Enqubweni yokubumba igalelo elisheshayo kanye nokupholisa, ukucindezeleka okwenziwe kukhiqizwa odongeni lwamabhodlela. Emabhodleleni esiphuzo se-carbonated, angakwazi ukumelana nokucindezela kwangaphakathi, okuhle, kodwa amabhodlela okugcwalisa okushisayo, kuyadingeka ukuqinisekisa ukuthi akhishwe ngokugcwele ngaphezu kwezinga lokushisa lokuguqulwa kwengilazi.
Isikhathi sokuthumela: Aug-02-2022