Umshini wepulasitiki we-pelletizing uyingxenye ebalulekile yemishini embonini yokucubungula amapulasitiki

1. Isimiso sokusebenza

Ncibilikisa i-extrusion: Izinto zokusetshenziswa zepulasitiki, imvamisa ezisesimweni sama-granules, ama-flakes, noma impushana, zifakwa ku-hopper yomshini wokugaya. Ngaphakathi komshini, ngokushisa nokugunda kwesistimu ye-screw kanye ne-barrel, ipulasitiki iyancibilika. Isikulufu siyazungeza futhi sidlulisele izinto zepulasitiki phambili, kancane kancane sandise ingcindezi njengoba sihamba emgqonyeni. Izakhi zokushisa ezizungeze umgqomo zinikeza ukushisa okudingekayo ukuze kufinyelele iphuzu lokuncibilika kwepulasitiki. Isibonelo, ku-polypropylene evamile (PP), indawo yokuncibilika icishe ibe ngu-160 - 170°C.

Ukuhlunga (ongakukhetha): Kwezinye izimo, ukususa ukungcola okufana nothuli, izinhlayiya ezingancibilikisiwe, noma amajeli, isikrini sokuhlunga siyafakwa. Ipulasitiki encibilikisiwe idlula isisefo, esibamba izinto ezingafuneki futhi siqinisekise ikhwalithi yepulasitiki ukuze ifakwe i-pelletizing.

Ukwakheka kwePellet: Ngemva kokuncibilika nokuhlunga, ipulasitiki encibilikisiwe iphoqelelwa ngepuleti lokufa elinezimbobo ezincane eziningi. Njengoba ipulasitiki iphuma ngalezi zimbobo, yenza imicu emide. Le micu ibe isisikwa ibe amapellets amancane anosayizi ongaguquki nge-pelletizer, ngokuvamile equkethe iqoqo lemimese ejikelezayo. Ubukhulu bama-pellets bungalungiswa ngokuvumelana nezidingo zokucubungula okulandelayo, ngokuvamile kusukela kumamilimitha ambalwa kuya kumamilimitha angu-10 ububanzi.

2. Izinhlobo zemishini yokugcwalisa ipulasitiki

Imishini ye-Pelletizing ngaphansi kwamanzi:

Kulolu hlobo, ipuleti lokufa licwiliswa emanzini - ekamelweni eligcwele amanzi. Njengoba imicu yepulasitiki encibilikisiwe idonswa emigodini yokufa, ipholiswa ngokushesha ngamanzi, ayiqinise ngokushesha. Ama-pellets akhiwe abe esethathwa ngokugeleza kwamanzi futhi ahlukaniswe emanzini ngenqubo yokomisa. Le ndlela ifanele ukushisa - amapulasitiki azwelayo njengoba inikeza ukupholisa okusheshayo, ukunciphisa ingozi yokuwohloka kwepulasitiki ngenxa yokushisa ngokweqile. Isibonelo, ivame ukusetshenziselwa ukucubungula i-polyethylene terephthalate (PET), ipulasitiki evamile esetshenziselwa ukupakisha, ukuqinisekisa ukuthi ama-pellets anekhwalithi enhle nokungafihli.

Imishini ye-Strand pelletizing:

Lapha, imicu yepulasitiki enwetshiwe ingumoya - ipholile njengoba iphuma efashini. Ngemva kokuba sezipholile futhi zaqina ngezinga elithile, zifakwa ku-pelletizer ukuze zisikwe. Lolu hlobo lomshini lulula futhi lubiza kakhulu - lusebenza ngempumelelo. Ifanele amapulasitiki anephuzu elincibilikayo eliphansi kanye nezinga lokucwebezela kancane, njengezinye izinhlobo ze-polyethylene (PE). Kodwa-ke, kungenzeka ingasebenzi kahle njengokugaywa kwamanzi ngaphansi kokukhiqizwa kwevolumu ephezulu yokushisa - amapulasitiki azwelayo.

Imishini yokugcwalisa i-pelletizing eshisayo:

Emshinini oshisayo osikiwe we-pelletizing, ama-pellets asikwa ngenkathi ipulasitiki isesesimweni sokuncibilika. Imimese yokusika ivamise ukushiselwa ukuze ipulasitiki inganamatheli kuyo. Lolu hlobo lomshini lungakhiqiza ama-pellets anendawo ebushelelezi kanye nokunemba okuphezulu ngosayizi. Ivamise ukusetshenziselwa amapulasitiki adinga isiphetho se-pellet sekhwalithi ephezulu, njengamapulasitiki athile wobunjiniyela njenge-acrylonitrile - butadiene - styrene (ABS).

3. Izicelo

Ukugaywa kabusha: Imishini yepulasitiki yokugaya idlala indima ebalulekile ekugayweni kabusha kwamapulasitiki. Bangakwazi ukuguqula amapulasitiki angcolile njengamabhodlela epulasitiki, amafilimu okupakisha, nemikhiqizo yepulasitiki ibe ama-pellets, angasetshenziswa njengezinto zokusetshenziswa ukukhiqiza imikhiqizo emisha yepulasitiki. Isibonelo, ama-pellets e-polyethylene asetshenziswe kabusha angasetshenziswa ukwenza izikhwama zepulasitiki, futhi ama-PET pellets asetshenziselwe ukukhiqiza amabhodlela amasha.

Ukukhiqizwa kwemikhiqizo yepulasitiki: Ekukhiqizeni imikhiqizo emisha yepulasitiki, umshini we-pelletizing usetshenziselwa ukukhiqiza ama-pellets ohlobo lwepulasitiki olufunwayo kanye nekhwalithi. Lawa ma-pellets abe esesetshenziswa ekubumbeni umjovo, ekubumbeni i-extrusion, ekubumbeni igalelo, nezinye izinqubo ukwenza imikhiqizo ehlukahlukene, okuhlanganisa amathoyizi, izingxenye zezimoto, amapayipi, neziqukathi.

4. Ukucatshangelwa kwesondlo nokuphepha

Ukunakekela: Ukuhlanzwa njalo komshini kubalulekile ukuze kukhishwe noma iyiphi insalela yepulasitiki enganqwabelana ngaphakathi kombhobho, isikulufu, futhi ife. Ukugcotshwa kwezingxenye ezihambayo, njenge-screw nama-bearings, kufanele futhi kwenziwe ngokuvumelana nemiyalelo yomkhiqizi ukuze kuqinisekiswe ukusebenza kahle. Ukuhlolwa kwezinto zokushisa nezinzwa zokushisa kuyadingeka ukuze kugcinwe ukulawulwa okunembile kwezinga lokushisa ngesikhathi sokuncibilika.

Ukuphepha: Ama-opharetha kufanele aqeqeshelwe ukuphatha umshini ngendlela efanele. Amazinga okushisa aphezulu abandakanyekayo enqubweni yokuncibilika angabangela ukusha, ngakho-ke igiya elifanele lokuphepha elifana nokushisa - amagilavu ​​amelana nokushisa kanye nezibuko zokuphepha kufanele kugqokwe. Izingxenye ezijikelezayo zomshini, njengesikulufu nemimese ye-pelletizer, zibeka engcupheni yokuthandela nokulimala, ngakho onogada kufanele babe sendaweni futhi banakekelwe.