Ungayivikela kanjani i-cavitationumshini wokugcwalisa i-polyurethane
1. Lawula ngokuqinile isilinganiso kanye nevolumu yomjovo wesixazululo sokuqala
Lawula isilinganiso sezinto ezimnyama, i-polyether ehlanganisiwe ne-cyclopentane.Ngaphansi kwesimo sokuthi umthamo ophelele womjovo uhlala ungashintshiwe, uma ingxenye yezinto ezimnyama zikhulu kakhulu, i-cavitation izovela, uma ingxenye yezinto ezimhlophe zikhulu kakhulu, ama-bubbles athambile azovela, uma ingxenye ye-cyclopentane inkulu kakhulu, ama-bubbles. izovela, futhi uma ingxenye incane kakhulu, i-cavitation izovela.Uma isilinganiso sezinto ezimnyama nezimhlophe zingalingani, kuzoba nokuxubana okungalingani kanye nokuncipha kwegwebu.

Inani lomjovo kufanele lisekelwe ezidingweni zenqubo.Lapho inani lomjovo liphansi kunesidingo senqubo, ukuminyana kokubumba kwegwebu kuzoba phansi, amandla azoba aphansi, futhi kwenzeka okuthile kokugcwalisa ama-vacuoles angenayo.Uma umthamo womjovo ungaphezulu kwezidingo zenqubo, kuzoba nokunwetshwa kwebhamuza nokuvuza, futhi ibhokisi (umnyango) lizokhubazeka.
2. Ukulawulwa kwezinga lokushisaumshini wokugcwalisa i-polyurethanekuyisihluthulelo sokuxazulula i-cavitation
Uma izinga lokushisa liphezulu kakhulu, ukusabela kunobudlova futhi kunzima ukulawula.Kulula ukubonakala ukuthi ukusebenza kwe-bubble liquid efakwe ebhokisini elikhulu akufani.Uketshezi lwebhamuza olujovwe ekuqaleni luye lwabhekana nokusabela kwamakhemikhali, futhi i-viscosity ikhula ngokushesha, futhi uketshezi lwebhamuza olujovwe kamuva alukasabela.Njengomphumela, uketshezi lwebhamuza olujovwe kamuva alukwazi ukusunduza uketshezi lwebhamuza olujovwe kuqala lufike ekugcineni kwenqubo yebhokisi, okuholela ku-cavitation yendawo ebhokisini.
Izinto ezimnyama nezimhlophe kufanele ziphathwe ngokushisa okungaguquki ngaphambi kogwebu, futhi izinga lokushisa elinegwebu kufanele lilawuleke ku-18 ~ 25℃.Ukushisa kwesithando somlilo esandulela ukushisa kwemishini yokugwebu kufanele kulawulwe ku-30 ​​~ 50 ℃, futhi izinga lokushisa lesikhunta esinegwebu kufanele lilawulwe phakathi kuka-35 ~ 45 ℃.
Lapho izinga lokushisa lesikhunta esinegwebu liphansi kakhulu, uketshezi lwesistimu ye-foam-liquid lumpofu, isikhathi sokuphulukisa side, ukusabela akuphelele, futhi i-cavitation iyenzeka;lapho izinga lokushisa lesikhunta esinegwebu liphezulu kakhulu, umugqa wepulasitiki wonakaliswa ukushisa, futhi uhlelo lwe-foam-liquid lusabela ngobudlova.Ngakho-ke, izinga lokushisa lesikhunta esinegwebu kanye nezinga lokushisa elizungezile lesithando somlilo kufanele lilawulwe ngokuqinile.
Ikakhulukazi ebusika, isikhunta esinegwebu, isithando somlilo esishisayo, isithando somlilo esinegwebu, ibhokisi nomnyango kufanele kushiswe ngaphambi kwemizuzu engaphezu kwengu-30 njalo ekuseni lapho kuvulwa umugqa.Ngemva kokukhihliza amagwebu isikhathi esithile ehlobo, uhlelo olunamagwebu kufanele lupholiswe phansi.

Ukulawula Ingcindezi Yomshini Wokugcwalisa I-Polyurethane Foaming
Ingcindezi yomshini okhipha amagwebu iphansi kakhulu.Izinto ezimnyama, ezimhlophe kanye ne-cyclopentane azixubene ngokufanayo, okubonakala njengobuningi obungalingani be-polyurethane foam, ama-bubbles amakhulu wendawo, ukuqhekeka kwe-foam, kanye ne-foam ethambile yendawo: imigqa emhlophe, ephuzi noma emnyama ibonakala ku-foam , i-foam yawa.Ingcindezi yomjovo womshini okhihliza amagwebu ingu-13~16MPa