Umshini okhiqiza amagwebu we-Polyurethane iyithuluzi elikhethekile lokufaka nokukhipha amagwebu e-polyurethane foam.Uma nje ingxenye ye-polyurethane izinto zokusetshenziswa (ingxenye ye-isocyanate nengxenye ye-polyether polyol) izinkomba zokusebenza zihlangabezana nezidingo zefomula.Imikhiqizo yegwebu elinganayo futhi efanelekayo ingakhiqizwa ngomshini we-polyurethane ophezulu nophansi wengcindezi.Yenziwe ngepulasitiki enegwebu ngamakhemikhali aphuma amagwebu e-polyether polyol kanye ne-polyisocyanate phambi kwezithasiselo zamakhemikhali ezihlukahlukene njenge-ejenti egwetshwayo, i-catalyst kanye ne-emulsifier.
Izinyathelo zokuqapha ukusebenza kweumshini wokugcwalisa i-polyurethane
1. Iumshini wokugcwalisa i-polyurethanekumele bagqoke izibuko zokuzivikela, izingubo zokusebenza namakepisi okusebenza, namagilavu enjoloba lapho besebenzisa inhlanganisela ye-polyurethane A no-B.Indawo okusetshenzwa kuyo kumele ingene umoya futhi ihlanzeke.Lapho izinga lokushisa lendawo liphezulu, i-agent egwebuzelayo ku-polyurethane A izonyakaza kancane futhi ikhiqize ukucindezela, ngakho-ke ikhava yokukhipha umoya kufanele ivulwe kuqala ukuze kukhululwe ingcindezi yegesi, bese kuvulwa isembozo somphongolo.
2. Lapho umshini okhihliza amagwebu we-polyurethane unezidingo zokunqanda amalangabi egwebu, umshini onamagwebu we-polyurethane ungasebenzisa i-additive flame retardant.Inani elingeziwe le-flame retardant evamile liyi-15-20% yesisindo sezinto ezimhlophe, futhi i-flame retardant yengezwe ku-polyurethane A impahla.Kumele inyakaziswe ngokulinganayo ngaphambi kokuba igwebu.
3. Ngesikhathi sokusebenza kwe-foaming manual yomshini we-polyurethane we-foaming, kala ngokunembile izinto ezihlanganisiwe ze-polyurethane A no-B ngesilinganiso bese uzithela esitsheni ngesikhathi esifanayo.Ngemuva kokugqugquzela imizuzwana engu-8 kuya kwezingu-10 nge-stirrer engaphezu kuka-2000 rpm, uthele esikhunjini kanye negwebu.Isikhathi sokudiliza sincike ezidingweni zomkhiqizo, ukushuba kwegwebu, njll.
4. Lapho isikhumba sihlangana nezinto ezihlanganisiwe ze-polyurethane A, kufanele zigezwe ngensipho namanzi.Lapho umshini okhipha amagwebu we-polyurethane usebenzisa i-polyurethane B (kukhona ukucasuka okuthile), ungawuhoxisi umusi wawo futhi ungawufafazi esikhumbeni nasemasweni.Uma kuziwa esikhumbeni nasemasweni, kufanele kusulwe ngekotini yezokwelapha ngokushesha, bese kuhlanzwa ngamanzi amaningi imizuzu engu-15, bese kuhlanjululwa ngensipho noma utshwala.
Amakhono okuthenga omshini we-polyurethane foaming
1. Qonda ngokugcwele uhlobo lomshini okhihliza amagwebu
Umgomo oyisisekelo womshini okhihliza amagwebu we-polyurethane ukwethula igesi kwikhambi le-aqueous le-ejenti ekhihlizayo, kodwa izinhlobo ezahlukene zemishini egwazayo zingenisa igesi ngezindlela ezihlukene.Isibonelo, uhlobo olunyakazayo olunesivinini esiphansi luncike kumablade ajikelezayo anesivinini esincane ukwethula igesi, okuholela ekukhiqizweni kwamabhamuza amancane kanye nokusebenza kahle kwamagwebu;uhlobo lwe-impeller olunesivinini esiphezulu luncike ku-impeller ejikelezayo ngesivinini esikhulu emoyeni wokukhipha igazi, ubukhulu bama-bubbles abukwazi ukulawulwa, futhi i-foam ayilingani;high-pressure kanye ne-medium-low ingcindezi izinhlobo zikhiqiza igwebu Isivinini esiphezulu, ukusebenza kahle okuphezulu, umfaniswano namabhamuza amancane.
2. Imingcele eyisisekelo yomshini we-polyurethane foaming:
1) Isivuno: Isivuno inani legwebu elikhiqizwayo, okufanele libe phezulu kancane kunenani elidingekayo legwebu ngo-20%.Ukuze ushiye indawo yenani le-foam elikhiqizwayo, umkhawulo ophansi kufanele usetshenziswe njengesisekelo sokubala nokubala, futhi umkhawulo ophezulu awukwazi ukusetshenziswa.
I-2) Umthamo ofakiwe womshini we-polyurethane foaming: umthamo ofakiwe ungamandla afakiwe aphelele.Le parameter ibaluleke kakhulu ekubaleni ukuguquguquka kwesekethe kagesi ekusetshenzisweni kwamandla okuphelele.
3) Usayizi nobubanzi ububanzi bomshini we-polyurethane foaming.
Isikhathi sokuthumela: Jul-27-2022