Ukukhutshwa kweTPU (iThermoplastic Polyurethane)

1. Ukulungiswa kwezinto

• I-TPUUkukhetha iiPellets: KhethaIipilisi zeTPUngobunzima obufanelekileyo (ubulukhuni bonxweme, obuqhele ukuba phakathi kwe-50A ne-90D), i-melt flow index (MFI), kunye neempawu zokusebenza (umz., ukumelana nokukrala okuphezulu, ukuthamba, kunye nokumelana neekhemikhali) ngokweemfuno zemveliso yokugqibela.
• Ukomisa:I-TPUi-hygroscopic, ngoko ke kufuneka yomiswe ngaphambi kokuba ikhutshwe ukuze kususwe umswakama. Ukufuma kunokubangela amaqamza, iziphene zomphezulu, kunye nokuncipha kweempawu zoomatshini kwiimveliso ezikhutshweyo. Ukomisa kudla ngokwenziwa kubushushu obuphakathi kwama-80 ukuya kwi-100°C kangangeeyure ezi-3 ukuya kwezi-6.

2. Inkqubo yokukhupha

• Izinto ezikhupha izinto
  • Ibhareli: Ibhareli ye-extruder ifudunyezwa kwiindawo ezahlukeneyo ukuze inyibilikise kancinci ii-TPU pellets. Iprofayili yobushushu icwangciswe ngononophelo ukuqinisekisa ukunyibilika ngokufanelekileyo ngaphandle kokufudumeza kakhulu - oku kunokubangela ukuwohloka. Umzekelo, ubushushu bendawo yokutya bunokuba malunga ne-160 - 180 °C, indawo yoxinzelelo malunga ne-180 - 200 °C, kunye nendawo yokulinganisa malunga ne-200 - 220 °C, kodwa la maxabiso anokwahluka ngokuxhomekeke kudidi lwe-TPU.
  • Isikrufu: Isikrufu sijikeleza ngaphakathi kwibhareli, sithutha, sicinezela, kwaye sinyibilikisaIipilisi zeTPU.Uyilo lwee-screw ezahlukeneyo (umz., ii-screw extruders ezi-single-screw okanye ii-twin-screw extruders) zinokuchaphazela ukuxuba, ukusebenza kakuhle kokunyibilika, kunye nesantya sokuphuma kwenkqubo yokukhupha. Ii-screw extruders ezi-twin-screw ngokubanzi zibonelela ngokuxuba okungcono kunye nokunyibilika okufanayo, ngakumbi kwiifomyula ezintsonkothileyo.
• Ukunyibilika Nokuxuba: Njengoko ii-TPU pellets zihamba kwi-barrel, ziyanyibilika kancinci kancinci ngokudityaniswa kobushushu obuvela kwi-barrel kunye nokucheba okuveliswa kukujikeleza kwezikrufu. I-TPU enyibilikisiweyo ixutywe kakuhle ukuqinisekisa ukunyibilika okufanayo.
• Uyilo kunye nokuBumba iDie: I-TPU enyibilikisiweyo emva koko inyanzeliswa kwidie, emisela imilo enqamlezileyo yemveliso ekhutshweyo. Iidie zingenziwa ngokwezifiso ukuvelisa iimilo ezahlukeneyo, ezifana nesangqa seetyhubhu, uxande lweeprofayili, okanye iflethi yeeshiti kunye neefilimu. Emva kokudlula kwidie, i-TPU ekhutshweyo iyapholiswa kwaye iqine, idla ngokudlula kwibhafu yamanzi okanye ngokusebenzisa ukupholisa umoya.

3. Ukucubungula emva

• Ukulinganisa kunye nobukhulu: Kwezinye iimveliso ezikhutshiweyo, imisebenzi yokulinganisa kunye nobukhulu iyafuneka ukuqinisekisa ubungakanani obuchanekileyo. Oku kunokubandakanya ukusebenzisa imikhono yokulinganisa, iitanki zokulinganisa i-vacuum, okanye ezinye izixhobo ukulawula ububanzi bangaphandle, ubukhulu, okanye ezinye imilinganiselo ebalulekileyo yemveliso.
• Ukusika okanye ukujika: Ngokuxhomekeke kwisicelo, imveliso yeTPU ekhutshiweyo inqunyulwa ibe bubude obuthile (kwiiprofayili, iityhubhu, njl.njl.) okanye ibotshelelwe kwimiqulu (yamashiti kunye neefilimu).