Kusanthula Kwathunthu kwaPellet ya TPUKuuma: Magawo, Mapulogalamu ndi Machenjezo Ogwiritsira Ntchito
TPU (Thermoplastic Polyurethane)Monga chinthu cha elastomer chogwira ntchito bwino, kuuma kwa ma pellets ake ndi chinthu chofunikira chomwe chimatsimikizira momwe zinthuzo zimagwirira ntchito komanso momwe zimagwiritsidwira ntchito. Kuuma kwa ma pellets a TPU ndi kwakukulu kwambiri, nthawi zambiri kuyambira 60A yofewa kwambiri mpaka 70D yolimba kwambiri, ndipo mitundu yosiyanasiyana ya kuuma imagwirizana ndi mawonekedwe osiyanasiyana akuthupi.Kulimba kwake kukakhala kwakukulu, kulimba kwake komanso kukana kwake kusintha kwa zinthuzo kumakhala kolimba, koma kusinthasintha kwake ndi kusinthasintha kwake kudzachepa moyenerera.M'malo mwake, TPU yolimba pang'ono imayang'ana kwambiri kufewa ndi kuchira kwa elasticity.
Ponena za kuyeza kuuma, ma durometer a Shore amagwiritsidwa ntchito kwambiri mumakampani poyesa. Pakati pawo, ma durometer a Shore A ndi oyenera kuuma kwapakati ndi kotsika kwa 60A-95A, pomwe ma durometer a Shore D amagwiritsidwa ntchito kwambiri pa TPU yolimba kwambiri kuposa 95A. Tsatirani mosamala njira zodziwika bwino poyesa: choyamba, ikani ma pellets a TPU m'zidutswa zoyesera zathyathyathya zosachepera 6mm, ndikuwonetsetsa kuti pamwamba pake palibe zolakwika monga thovu ndi mikwingwirima; kenako lolani zidutswa zoyesera ziyime pamalo otentha a 23℃±2℃ ndi chinyezi cha 50%±5% kwa maola 24. Zidutswa zoyesera zikakhazikika, kanikizani indenter ya durometer molunjika pamwamba pa chidutswa choyesera, chisungeni kwa masekondi atatu kenako werengani mtengo wake. Pa gulu lililonse la zitsanzo, yezani mfundo zosachepera 5 ndikupeza avareji kuti muchepetse zolakwika.
Yantai Linghua New Material CO., LTD.Ili ndi mzere wathunthu wazinthu zomwe zimakwaniritsa zosowa za kuuma kosiyanasiyana. Ma pellet a TPU okhala ndi kuuma kosiyanasiyana ali ndi magawo omveka bwino a ntchito m'magawo ogwiritsira ntchito:
- Pansi pa 60A (yofewa kwambiri): Chifukwa cha kukhudza kwawo bwino komanso kusinthasintha, nthawi zambiri amagwiritsidwa ntchito pazinthu zomwe zimafunikira kwambiri kuti zikhale zofewa monga zoseweretsa za ana, mipira yochepetsera kupsinjika, ndi zophimba zamkati;
- 60A-70A (yofewa): Kulinganiza kusinthasintha ndi kukana kuvala, ndi chinthu choyenera kwambiri pa nsapato zamasewera, mphete zotsekera zosalowa madzi, machubu olowetsera ndi zinthu zina;
- 70A-80A (yofewa pang'ono): Ndi magwiridwe antchito oyenera, imagwiritsidwa ntchito kwambiri pazochitika monga zingwe zolumikizira, zophimba chiwongolero cha galimoto, ndi maulendo azachipatala;
- 80A-95A (yapakatikati-yolimba mpaka yolimba): Kulinganiza kulimba ndi kulimba, ndikoyenera zinthu zomwe zimafuna mphamvu yothandizira monga ma printer rollers, mabatani owongolera masewera, ndi zikwama za foni yam'manja;
- Pamwamba pa 95A (yolimba kwambiri): Ndi mphamvu zambiri komanso kukana kugunda, yakhala chinthu chomwe chimakonda kwambiri pa zida zamafakitale, zishango zamakanika, ndi zida zolemera zotenthetsera.
Mukagwiritsa ntchitoMapiritsi a TPU,mfundo zotsatirazi ziyenera kukumbukiridwa:
- Kugwirizana kwa mankhwala: TPU imakhudzidwa ndi zinthu zosungunulira za polar (monga mowa, acetone) ndi ma acid amphamvu ndi alkali. Kukhudzana nazo kungayambitse kutupa kapena ming'alu mosavuta, choncho kuyenera kupewedwa m'malo otere;
- Kulamulira kutentha: Kutentha komwe kumagwiritsidwa ntchito kwa nthawi yayitali sikuyenera kupitirira 80℃. Kutentha kwambiri kudzapangitsa kuti zinthuzo zikalamba msanga. Ngati zigwiritsidwa ntchito pa kutentha kwambiri, zowonjezera zotsutsana ndi kutentha ziyenera kugwiritsidwa ntchito;
- Malo osungiramo zinthu: Zinthuzo ndi zopyapyala kwambiri ndipo ziyenera kusungidwa pamalo otsekedwa, ouma komanso opumira mpweya ndipo chinyezi chake chiziwongoleredwa pa 40%-60%. Musanagwiritse ntchito, ziyenera kuumitsidwa mu uvuni wa 80℃ kwa maola 4-6 kuti zisawonongeke thovu panthawi yokonza;
- Kusintha kwa njira zogwirira ntchito: TPU yolimba mosiyanasiyana iyenera kufanana ndi magawo enaake a njira. Mwachitsanzo, TPU yolimba kwambiri iyenera kuwonjezera kutentha kwa mbiya kufika pa 210-230℃ panthawi yopangira jakisoni, pomwe TPU yofewa iyenera kuchepetsa kupanikizika kuti isawonongeke.
Nthawi yotumizira: Ogasiti-06-2025