Uyini umehluko phakathi kokubumba umjovo kanye nokubumba igalelo?

Uyini umehluko phakathi kokubumba umjovo kanye nokubumba igalelo?

1. Inqubo yokubumba umjovo kanye nokubunjwa kokushaywa ihlukile.Ukubumba ukuvuthela kungukujova + ukuvunguza;ukubumba umjovo umjovo + ukucindezela;ukubumba igalelo kufanele kube nekhanda elishiywe yipayipi elivuthelayo, futhi ukubumba komjovo kufanele kube nesigaba seSango

2. Ngokuvamile, ukubumba umjovo kuwumgogodla oqinile, ukubunjwa kwe-blower kuwumgogodla ongenalutho, futhi ukubonakala kokubunjwa kokushaywa akulingani.I-Blow molding inembobo ephephezelayo.

3. Ukubunjwa komjovo, okungukuthi, ukubumba komjovo we-thermoplastic, lapho izinto zepulasitiki zincibilika bese zijova emgodini wefilimu.Uma ipulasitiki encibilikisiwe ingena esikhunjeni, ipholiswa ibe yisimo esifana nesigxobo.Umumo owumphumela uvame ukuba umkhiqizo wokugcina futhi akukho ukucubungula okwengeziwe okudingekayo ngaphambi kwempahla noma ukusetshenziswa njengomkhiqizo wokugcina.Imininingwane eminingi, njengabaphathi, izimbambo, nemicu, ingakhiwa emsebenzini wokubumba umjovo owodwa.Umshini wokubumba umjovo unezingxenye ezimbili eziyisisekelo: ithuluzi lomjovo elincibilikisa futhi liphakele ipulasitiki esikhunjeni, kanye nedivaysi yokubopha.Umthelela wemishini yokubumba yile:

I-1) Isikhunta sivaliwe ngaphansi kwesimo sokuthola ingcindezi yomjovo;

2) Khipha umkhiqizo emshinini womjovo ukuze uncibilikise ipulasitiki ngaphambi kokuba ifakwe esikhunjeni, bese ulawula ukucindezela kanye nesivinini sokujova ukuncibilika esikhunjini.Kunezinhlobo ezimbili zemishini yomjovo esetshenziswa namuhla: isikulufa sangaphambi kwepulasitiki noma isisetshenziswa esinezigaba ezimbili, nesikulufu esiphindaphindayo.Ama-screw pre-plasticizers asebenzisa isikulufu sangaphambi kwepulasitiki (isigaba sokuqala) ukujova ipulasitiki encibilikisiwe entweni yomjovo (isigaba sesibili).Izinzuzo ze-screw pre-plasticizer yikhwalithi yokuncibilika okuzinzile, ukucindezela okuphezulu nesivinini esikhulu, kanye nokulawulwa kwevolumu yomjovo okunembile (usebenzisa amadivaysi omshini wokuphonswa kuzo zombili iziphetho ze-piston stroke).

Lezi zinzuzo ziyadingeka emikhiqizweni ecacile, enezindonga ezincane kanye namazinga aphezulu okukhiqiza.Ukungalungi kuhlanganisa isikhathi sokuhlala esingalingani (okuholela ekulimaleni kwezinto ezibonakalayo), izindleko eziphezulu zemishini kanye nezindleko zokuyilungisa.Imishini yokujova isikulufu esetshenziswa kaningi ayidingi i-plunger ukuze incibilike futhi ijove ipulasitiki.

I-Blow molding: eyaziwa nangokuthi i-hollow blow molding, i-blow molding, indlela yokucubungula ipulasitiki ethuthukayo.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.Inqubo yokukhiqiza ifilimu eshaywayo ifana kakhulu nomgomo wokuvuthela ukubunjwa kwemikhiqizo engenalutho, kodwa ayisebenzisi isikhunta.Ngokombono wokuhlukaniswa kobuchwepheshe bokucutshungulwa kwepulasitiki, inqubo yokubumba yefilimu eshaywayo ivame ukufakwa ku-extrusion.Inqubo yokubumba i-blow yaqala ukusetshenziselwa ukukhiqiza izitsha ze-polyethylene ezinezinga eliphansi phakathi neMpi Yezwe II.Ngasekupheleni kwawo-1950, lapho kuzalwa i-polyethylene ephezulu kakhulu kanye nokuthuthukiswa kwemishini yokubumba, amakhono okubumba asetshenziswa kabanzi.Umthamo weziqukathi ezingenalutho ungafinyelela ezinkulungwaneni zamalitha, futhi ukukhiqizwa okuthile kusebenzisa ukulawula kwekhompyutha.Amapulastiki afanele ukubunjwa kokushaywa ahlanganisa i-polyethylene, i-polyvinyl chloride, i-polypropylene, i-polyester, njll., futhi iziqukathi ezingenalutho ezitholiwe zisetshenziswa kabanzi njengeziqukathi zokupakisha zezimboni.