I-Polypropylene (PP) "i-polymer yokwengeza" ye-thermoplastic eyenziwe ngenhlanganisela yama-propylene monomers. Isetshenziswa ezinhlelweni ezahlukahlukene zokufaka phakathi ukupakishwa kwemikhiqizo yabathengi, izingxenye zepulasitiki zezimboni ezahlukahlukene kufaka phakathi imboni yezimoto, izinto ezikhethekile ezinjengamahinge aphilayo, nezindwangu.
1. Ukwelashwa kwamapulasitiki.
I-PP ehlanzekile inombala omhlophe wezinyo lendlovu futhi ingadaywa ngemibala ehlukahlukene. Ngokudaya kwe-PP, i-masterbatch yombala kuphela engasetshenziswa ngokujwayelekileukubumba umjovoimishini. Imikhiqizo esetshenziswa ngaphandle ivamise ukugcwaliswa ngama-UV stabilizer kanye ne-carbon black. Isilinganiso sokusetshenziswa kwezinto ezigaywe kabusha akufanele seqe u-15%, ngaphandle kwalokho kuzodala ukwehla kwamandla nokubola kanye nokuguquka kombala.
2. Ukukhethwa komshini wokubumba umjovo
Ngoba i-PP ine-crystallinity ephezulu. Kudingeka umshini wokubumba umjovo wekhompyutha onengcindezi ephezulu yomjovo kanye nokulawula okunezigaba eziningi. Amandla okubamba ngokuvamile anqunywa ku-3800t/m2, futhi umthamo womjovo ungama-20% -85%.
3. Isikhunta kanye nomklamo wesango
Izinga lokushisa lesikhunta lingu-50-90 ℃, futhi izinga lokushisa eliphezulu lesikhunta lisetshenziselwa izidingo zosayizi ophezulu. Izinga lokushisa eliyisisekelo lingaphezu kuka-5 ℃ ngaphansi kwezinga lokushisa lomgodi, ububanzi bomgijimi bungu-4-7mm, ubude besango lenaliti bungu-1-1.5mm, kanti ububanzi bungaba buncane njengo-0.7mm. Ubude besango elinqenqemeni bufushane ngangokunokwenzeka, cishe ngo-0.7mm, ukujula kuyingxenye yobukhulu bodonga, futhi ububanzi buphindwe kabili kodonga, futhi buzokhula kancane kancane nobude bokugeleza kokuncibilika emgodini. Isikhunta kufanele sibe nomoya omuhle. Imbobo yokukhipha umoya ingu-0.025mm-0.038mm ukujula nobukhulu obungu-1.5mm. Ukuze ugweme ama-shrinkage marks, sebenzisa i-nozzle enkulu futhi eyindilinga kanye nomgijimi oyindilinga, futhi ubukhulu bezimbambo kufanele bube buncane. Ubukhulu bemikhiqizo eyenziwe nge-homopolymer PP abukwazi ukudlula u-3mm, ngaphandle kwalokho kuzoba namabhamuza.
4. Izinga lokushisa elincibilikayo
Iphuzu elincibilikayo le-PP liyi-160-175 ° C, futhi izinga lokushisa lokubola liyi-350 ° C, kodwa ukulungiselelwa kwezinga lokushisa akukwazi ukudlula i-275 ° C ngesikhathi sokucubungula umjovo. Izinga lokushisa lendawo encibilikayo lingcono kakhulu libe ngu-240°C.
5. Isivinini sokujova
Ukuze kuncishiswe ukucindezeleka kwangaphakathi kanye nokuguqulwa, umjovo wejubane eliphezulu kufanele ukhethwe, kodwa amanye amamaki e-PP kanye nokubunjwa akufanelekile. Uma indawo enephethini ibonakala inemigqa ekhanyayo nemnyama ehlakazwe yisango, umjovo wejubane eliphansi kanye nezinga lokushisa eliphakeme lokukhunta kufanele lisetshenziswe.
6. Ncibilikisa i-adhesive back pressure
I-5bar melt adhesive back pressure ingasetshenziswa, futhi ingcindezi yangemuva yezinto ze-toner ingalungiswa ngendlela efanele.
7. Ukugcina umjovo nokucindezela
Sebenzisa ingcindezi yomjovo ephezulu (1500-1800bar) nokubamba ingcindezi (cishe ama-80% womjovo). Shintshela ekubambeni ingcindezi cishe ku-95% we-stroke egcwele, futhi usebenzise isikhathi eside sokubamba.
8. Ngemuva kokucubungula imikhiqizo
Ukuze uvimbele ukuncipha kanye nokuguqulwa okubangelwa i-post-crystallization, imikhiqizo ngokuvamile idinga ukucwiliswa.d emanzini ashisayo.
Isikhathi sokuthumela: Feb-25-2022
