Umgomo wokukhiqiza wemishini yokubumba i-hollow blowing kanye nendlela yayo yokubumba Okubizwa ngokuthi umshini wokubumba umshini ubizwa nangokuthi umshini wokubumba ongenalutho.Ipulasitiki iyancibilika futhi ikhishwe ngobuningi ku-screw extruder, bese ibunjwa ngefilimu yomlomo, bese ipholiswa ngendandatho yomoya, bese ifuthelwa esikhunjeni.Indlela yokucubungula amapulasitiki akhula ngokushesha.Ipharishi yepulasitiki eyishubhu etholwe nge-extrusion noma ngokubunjwa ngomjovo we-thermoplastic resin ifakwa esikhunjini esihlukanisayo ngenkathi kushisa (noma ishiselwa esimweni esithambile), futhi umoya ocindezelwe ungeniswa ejele ngokushesha ngemva kokuvala isikhunta ukuze kuqhunyiswe i-parison yepulasitiki. .Iyanda futhi inamathele eduze kodonga lwangaphakathi lwesikhunta, futhi ngemva kokupholisa nokudilizwa, kutholakala imikhiqizo ehlukahlukene engenalutho.
Umshini/inqubo yokubumba i-blow yaqala ukusetshenziswa ukukhiqiza izitsha ze-polyethylene ezinezinga eliphansi phakathi neMpi Yezwe II.Ngasekupheleni kwawo-1950, lapho kuzalwa i-polyethylene ephezulu kakhulu kanye nokuthuthukiswa kwemishini yokubumba i-bloom, ubuchwepheshe bemishini yokubumba i-blow yasetshenziswa kabanzi.Umthamo weziqukathi ezingenalutho ungafinyelela izinkulungwane zamalitha, futhi okunye ukukhiqizwa kuye kulawulwa ama-computer.Amapulastiki afanele ukubunjwa kokushaywa ahlanganisa i-polyethylene, i-polyvinyl chloride, i-polypropylene, i-polyester, njll., futhi iziqukathi ezingenalutho ezitholiwe zisetshenziswa kabanzi njengeziqukathi zokupakisha zezimboni.
Isingeniso sendlela yokubumba ye-hollow blow molding:
Ngenxa yomehluko wezinto ezingavuthiwe, izidingo zokucubungula, okukhiphayo kanye nezindleko, izindlela ezihlukene zokubumba igalelo zinezinzuzo ezihlukene ekucubunguleni imikhiqizo ehlukene.
Ukubunjwa kokushaywa kwemikhiqizo engenalutho kuhlanganisa izindlela ezintathu eziyinhloko:
1. I-Extrusion blow blowing: isetshenziselwa ikakhulukazi ukucubungula isonto elingasekelwe;
2. Ukubunjwa kokushaywa komjovo: ikakhulukazi esetshenziselwa ukucubungula isonto elisekelwe yinsimbi;
3. Ukubumba i-Stretch blow: kufaka phakathi ukubumba kwe-extrusion-stretch-blow, ukubumba kwe-injection-stretch-blow izindlela ezimbili, kungacubungula imikhiqizo egxile ku-biaxially, kunciphise kakhulu izindleko zokukhiqiza futhi kuthuthukise ukusebenza komkhiqizo.
Ngaphezu kwalokho, kukhona ukubunjwa kwe-multi-layer blow, ukubunjwa kwe-compression blow, ukubunjwa kwe-dip coating blow, ukubunjwa kwegwebu, ukubunjwa kwe-t-dimensional blow, njll. , futhi i-1% ingenye yokubumba igalelo;phakathi kwayo yonke imikhiqizo yokubumba igalelo, ama-75% ayingxenye yemikhiqizo egxile ku-biaxially.Izinzuzo zokubunjwa kwe-extrusion blowue ukusebenza kahle kokukhiqiza okuphezulu, izindleko zemishini ephansi, ukukhetha okubanzi kwezibunjwa nemishini, kanye nokubi izinga eliphezulu le-scrap, ukungasasebenzi kabusha nokusetshenziswa kwe-scrap, ukulawula ukushuba komkhiqizo, kanye nokuhlakazeka kwezinto ezibonakalayo.Ngemuva kwalokho, kuyadingeka ukwenza umsebenzi wokunquma.Inzuzo ye-injection blow blowing yukuthi akukho imfucuza enqubweni yokucubungula, futhi ubukhulu bodonga bomkhiqizo kanye nokuhlakazeka kwezinto kungalawulwa kahle.Okubi ukuthi imishini yokubumba iyabiza futhi ngezinga elithile ifaneleka kuphela emikhiqizweni emincane evuthwe.
Izimo zenqubo yokugoqa okungenalutho zidinga ukuthi umoya ocindezelwe ovuthela i-parison ekubunjweni kufanele uhlanzeke.Ingcindezi yomoya yokubumba igalelo lokujova yi-0.55 kuya ku-1 MPa;ingcindezi yokubumba i-extrusion blow ngu-0.2l kuya ku-0.62 MPa, futhi ingcindezi yokubumba i-stretch blow ngokuvamile idingeka ukuthi ibe phezulu njengo-4 MPa.Ekuqinisweni kwamapulasitiki, ukucindezela okuphansi kwenza ukucindezeleka kwangaphakathi komkhiqizo kube phansi, ukuhlakazeka kokucindezeleka kufana kakhulu, futhi ukucindezeleka okuphansi kungathuthukisa ukushuba, umthelela, ukugoba nezinye izakhiwo zomkhiqizo.
Isikhathi sokuthumela: Nov-21-2023