Ukukhutshwa kwe TPU (Thermoplastic Polyurethane)

1. Ukulungiselela Izinto

• TPUUkhetho lweePellet: KhethaIipilisi zeTPUngobulukhuni obufanelekileyo (ubunzima bonxweme, ngokuqhelekileyo ukusuka kwi-50A - 90D), isalathisi sokuhamba kwe-nyibilika (i-MFI), kunye neempawu zokusebenza (umzekelo, ukuxhathisa okuphezulu kwe-abrasion, ukuqina, kunye nokuchasana kweekhemikhali) ngokweemfuno zokugqibela zemveliso.
• Ukomisa:TPUi-hygroscopic, ngoko ke kufuneka yomiswe kwangaphambili ngaphambi kokuba i-extrusion isuse ukufuma. Ubumanzi bunokubangela amaqamza, iziphene zomhlaba, kunye nokunciphisa iimpawu zomatshini kwiimveliso ezikhutshiweyo. Ukomisa ngokuqhelekileyo kuqhutyelwa kwiqondo lokushisa phakathi kwe-80 - 100 ° C kwiiyure ezi-3 - 6.

2. Inkqubo ye-Extrusion

• Extruder Components
  • Umgqomo: Umbhobho we-extruder ufudunyezwa kwiindawo ezininzi ukuze unyibilike ngokuthe ngcembe iipellets zeTPU. Iprofayili yeqondo lokushisa ibekwe ngokucophelela ukuqinisekisa ukunyibilika okufanelekileyo ngaphandle kokugqithiswa - ukufudumeza izinto eziphathekayo, ezinokubangela ukuthotywa. Umzekelo, ubushushu bommandla wesondlo bunokuba malunga ne-160 - 180 ° C, indawo yoxinzelelo malunga ne-180 - 200 ° C, kunye nendawo yokulinganisa i-200 - 220 ° C, kodwa la maxabiso anokwahluka ngokuxhomekeke kwibakala le-TPU.
  • Screw: Isikrufu sijikeleza ngaphakathi kombhobho, sihambisa, sicinezela, kwaye sinyibilikaIipilisi zeTPU.Uyilo olwahlukileyo lwezikrufu (umzekelo, esinye - isikrufu okanye iwele - i-screw extruders) inokuchaphazela ukuxuba, ukusebenza kakuhle kokunyibilika, kunye nesantya semveliso yenkqubo ye-extrusion. I-Twin - screw extruders ngokubanzi zibonelela ngokuxutywa okungcono kunye nokunyibilika okufanayo, ngakumbi kwimixube entsonkothileyo.
• Ukunyibilika kunye nokuxuba: Njengoko iipellets ze-TPU zihamba emgqomeni, ziyancibilika ngokuthe ngcembe ngokudityaniswa kobushushu obuvela kwi-barrel kunye ne-shear eyenziwa yi-screw rotation. I-TPU etyhidiweyo ixutywe ngokucokisekileyo ukuqinisekisa ukunyibilika okulinganayo.
• Die Design and Shaping: I-TPU etyhidiweyo iye yanyanzeliswa ngokufa, emisela umnqamlezo - imilo yecandelo lemveliso ekhutshiweyo. Ukufa kungenziwa ngokwezifiso ukuvelisa iimilo ezahlukeneyo, ezinjengendawo engqukuva yeityhubhu, uxande lweeprofayili, okanye umcaba wamaphepha kunye neefilimu. Emva kokudlula kwi-die, i-TPU ekhutshiweyo ipholile kwaye iqiniswe, ngokuqhelekileyo ngokudlula kwindawo yokuhlambela amanzi okanye ukusebenzisa ukupholisa umoya.

3. Isithuba – Ukusetyenzwa

• Ulungelelwaniso kunye nobungakanani: Kwiimveliso ezithile ezikhutshiweyo, ukulinganisa kunye nokusebenza kweesayizi kuyafuneka ukuze kuqinisekiswe imilinganiselo echanekileyo. Oku kunokubandakanya ukusebenzisa imikhono yokulinganisa, iitanki zokufunxa, okanye ezinye izixhobo zokulawula idiamitha yangaphandle, ubungqingqwa, okanye eminye imilinganiselo ebalulekileyo yemveliso.
• Ukusika okanye ukuPhelisa: Ngokuxhomekeke kwisicelo, imveliso ye-TPU ekhutshiweyo inokunqunyulwa ubude obuthile (kwiiprofayili, iibhubhu, njl.) okanye inxeba kwi-rolls (yamaphepha kunye neefilimu).