Ukukhishwa kwe-TPU (Thermoplastic Polyurethane)

1. Ukulungiselela Impahla

• I-TPUUkukhethwa kwe-Pellets: KhethaAmapulangwe e-TPUngobulukhuni obufanele (ukuqina kosebe, ngokuvamile okusukela ku-50A – 90D), inkomba yokugeleza kwencibilika (MFI), nezici zokusebenza (isb., ukumelana nokuhuzuka okuphezulu, ukunwebeka, nokumelana namakhemikhali) ngokuya ngezidingo zokugcina zomkhiqizo.
• Ukomisa:I-TPUi-hygroscopic, ngakho-ke kufanele yomiswe ngaphambi kokukhipha umswakama. Umswakama ungabangela amabhamuza, ukonakala kwendawo, nokuncipha kwezakhiwo zemishini emikhiqizweni ekhishwe. Ukomisa kuvame ukwenziwa ekushiseni okuphakathi kuka-80 – 100°C amahora ama-3 – 6.

2. Inqubo Yokukhipha

• Izingxenye ze-Extruder
  • Umgqomo: Umgqomo we-extruder ushiswa ezindaweni eziningi ukuze uncibilike kancane kancane ama-pellets e-TPU. Iphrofayili yokushisa isethwe ngokucophelela ukuze kuqinisekiswe ukuncibilika okufanele ngaphandle kokushisisa okungaphezulu, okungaholela ekulimazeni. Isibonelo, izinga lokushisa lendawo yokuphakelayo lingase libe ngu-160 – 180°C, indawo yokuminyanisa ibe ngu-180 – 200°C, kanye nendawo yokukala ibe ngu-200 – 220°C, kodwa lawa manani angahluka kuye ngebanga le-TPU.
  • Isikulufu: Isikulufu sizungeza ngaphakathi komgqomo, sidlulise, sicindezele, futhi sincibilikiseAmapulangwe e-TPU.Imiklamo ehlukene yesikulufu (isb., isikulufu esisodwa - isikulufu noma amawele - izikulufi ezikhipha izikulufi) zingathinta ukuxutshwa, ukuncibilika kahle, kanye nezinga lokukhiphayo lenqubo yokukhipha. Amawele - ama-screw extruder ngokuvamile ahlinzeka ngokuxuba okungcono nokuncibilika okufanayo, ikakhulukazi ukwakheka okuyinkimbinkimbi.
• Ukuncibilika Nokuxutshwa: Njengoba ama-pellets e-TPU edlula emgqonyeni, kancane kancane ayancibilika ngokuhlanganiswa kokushisa okuvela emgqonyeni kanye ne-shear okukhiqizwa ukuzungezisa isikulufu. I-TPU encibilikisiwe ixubene kahle ukuze kuqinisekiswe ukuncibilika okulinganayo.
• I-Die Design and Shaping: I-TPU encibilikisiwe ibe isiphoqelelwa ngedayizi, enquma isiphambano - ukwakheka kwesigaba somkhiqizo okhishiwe. Ama-Dies angenziwa ngendlela oyifisayo ukuze akhiqize izimo ezihlukene, ezifana nendingilizi yamashubhu, unxande wamaphrofayili, noma isicaba samashidi namafilimu. Ngemva kokudlula kufa, i-TPU ekhishiwe iyapholiswa futhi iqiniswe, ngokuvamile ngokudlula kubhavu wamanzi noma ngokusebenzisa ukupholisa umoya.

3. Thumela - Iyacubungula

• Ukulinganisa Nokulinganisa: Kweminye imikhiqizo ekhishiwe, ukulinganisa nokulinganisa kuyadingeka ukuze kuqinisekiswe ubukhulu obunembile. Lokhu kungase kuhlanganise ukusebenzisa imikhono yokulinganisa, amathangi osayizi we-vacuum, noma ezinye izisetshenziswa ukuze ulawule ububanzi bangaphandle, ukujiya, noma obunye ubukhulu bomkhiqizo.
• Ukusika noma Ukusonga: Ngokuya ngohlelo lokusebenza, umkhiqizo we-TPU okhishiwe ungasikwa ube ngobude obuthile (kumaphrofayili, amashubhu, njll.) noma ulinyazwe kuma-roll (amashidi namafilimu).