Poliyuritani pibilikiw, i n’a fɔ polimɛri fɛn min bɛ baara kɛ kosɛbɛ, o bɛ kɛ kosɛbɛ petoroli, mobili, sow jibɔ ni jibɔ, ani furakɛli minɛnw baarakɛyɔrɔw la, k’a sababu kɛ u ka sɛgɛnbaliya ɲuman ye, u tɛ se ka tulu kɛlɛ, u tɛ se ka sɔgɔli kɛ kemikɛli la, ani u bɛ se ka fɛn caman sɛgɛsɛgɛ.A dilanni kɛcogo ɲuman bɛ nɔ bila tigitigi fɛn dilannen ka masin cogoyaw la, a hakɛ tiɲɛni na, ani a ka baara waati la. O la, ɲinini jugu minnu kɛra poliyuritan pibilikiw dilanni taabolo kan, olu bɛ na ni nafa caman ye ɛntɛrinɛti waleyali la.
Poliyuritani pibilikiw jogo jɔnjɔnw ani u dilanni wajibiyalenw
Poliyuritani (PU) ye polimɛri fɛn ye min bɛ dilan ni poliyɔliw ni isosiyanatiw ka polimɛrizi ye. Ka da yɔrɔ nɔgɔlenw ni yɔrɔ gɛlɛnw hakɛ kan, a bɛ se ka tila ka kɛ poliyuritan thermoplastique (TPU) ani poliyuritan (CPU) ye. A ka c’a la, poliyuritani pibilikiw bɛ dilan ni bɔgɔdaga ye. Moli kɛcogo bɛ a ɲini ka fɛnɲɛnamafagalanw hakɛw kɔlɔsi kosɛbɛ, ka farikoloɲɛnajɛ funteni, fɛn dilannenw dilanni, ani baarakɛminɛnw dilanni kɔfɛ-cogow walasa ka pibiliki girinya, a fanga ani a sanfɛla dafa.
Poliyuritan pibilikiw dilanni wajibiyalenba minnu ka kan ka kɛ, olu ye:
1. Fɛnɲɛnamafagalanw furakɛli ka kɔn : Poliyoliw ni isosiyanatiw ka kan ka ɲagami ɲɔgɔn na kosɛbɛ funteni kɛrɛnkɛrɛnnen dɔ la walasa fiɲɛ tolenw kana bɔ;
2. Reaction control : Poliyuritan ka kɛnɛyali bɛ funteni caman bɔ, o bɛ kɛ sababu ye ka mɔli funteni ni a bɔn teliya lasegin walasa ka sigida funteni ni kari bali
3. Demolding ani post{1}}treatment: Pipes moulées mago bɛ post-vulcanization walima nɛnɛ bɛnnen na walasa ka dimension sabatili ɲɛ.
Poliyuritani pibilikiw dilanni taabolo kunbabaw
1. Casting Molding (Casting Molding) kɛcogo
Casting molding ye fɛn dilanni fɛɛrɛ ye min bɛ kɛ ka caya poliyuritan pipew la. A ka fɛɛrɛ jɔnjɔnw ye ninnu ye:
• Fɛnɲɛnamafagalanw ɲagamini : Prepolimɛri (isosiyanati yɔrɔ) ni cakɛda janyalan (polyol yɔrɔ) bɛ ɲagami ɲɔgɔn na hakɛ kɛrɛnkɛrɛnnen dɔ la, ani fiɲɛbɔlanw bɛ bɔ ɲagami kɛcogo la ni gazi bɔli ye ni vacuum ye.
• Nɔgɔ labɛnni : Nɔgɔ ka kan ka sumaya ka kɔn a funteni hakɛ bɛnnen na (a ka ca a la 60~80℃), ani ka fɛn dɔ kɛ a la walasa ka dɔ bɔ a nɔrɔli la.
• A sɔgɔli ni a kɛnɛyali : Fɛnɲɛnɛma ɲagaminenw bɛ pikiri kɛ bɔgɔdaga kɔnɔ ka u kɛnɛya ni degun dɔ ye (a ka c’a la, fiɲɛ walima tansiyɔn dɔgɔman). A kɛnɛyali waati bɛ bɔ pibiliki cɛmancɛ ni kogo janya la, a ka ca a la a bɛ daminɛ miniti damadɔ la ka se miniti tan ma.
• Demolding: Pipe kɛnɛyalen kɔfɛ pewu, a bɛ demolding ani ka a tigɛ.
Nin wale in bɛnnen don ni fɛn misɛnninw ye, minnu bɛ kɛ ni suguya caman ye, kɛrɛnkɛrɛnnenya la, poliyuritan pibilikiw dilanni na minnu jɔcogo ka gɛlɛn.
2. Extrusion Moulding (bɔli) kɛcogo
Walasa ka pibiliki tilennenw walima poliyuritan pipe nɔgɔmanw dilan jamaba la, extrusion molding bɛ se ka kɛ. O kɛcogo in dɔw ye:
• Fɛnɲɛnamafagalanw wulicogo : Poliyuritan (TPU) thermoplastique (TPU) granules bɛ sumaya ka u wuli ni fɛnɲɛnamafagalan ye min bɛ wele ko screw extruder;
• Extrusion molding : Fɛn min wulilen don, o bɛ bɔ ni die kɛrɛnkɛrɛnnen dɔ ye walasa ka kɛ tubabukan ye min bɛ to senna;
• Nɛnɛ ni a cogoya: Tubabufura min bɔra kɛnɛma, o bɛ nɛnɛ joona ni ji walima fiɲɛ nɛnɛ ye, o kɔ, a bɛ kɔrɔta ka tigɛ ka se a janya wajibiyalen ma ni samalan ye.
Extrusion bɛ baara kɛ kosɛbɛ, wa a bɛnnen don poliyuritan tubabukan na min bɛ kɛ ka kɛɲɛ ni sariya ye, nka a tɛ fɛn caman sɛgɛsɛgɛ fɛn dilannenw jɔcogo la.
3. Reaction Injection Molding (RIM) kɛcogo
Ni poliyuritan tubabukan belebelebaw walima minnu ka gɛlɛn kosɛbɛ, olu bɛ se ka kɛ ni farikoloɲɛnajɛ pikiri kɛcogo ye. O kɛcogo in ye ka poliyɔliw ni izosiyanatiw mara u dan na tansiyɔnba-silindaw kɔnɔ, k’u ɲagami teliya la tansiyɔnba kɔnɔ, ka sɔrɔ ka o ɲagaminen pikiri kɛ bɔgɔdaga dɔ kɔnɔ. O ɲagaminen bɛ ɲɔgɔn sɔrɔ ka gɛlɛya ka kɛ cogo laban ye. RIM bɛnnen don tubabukan na min ka bon-kogow la, wa a bɛ kɛ ni fɛn dilanni cycle surun ye ani a ka fɛn dilannenw fanga ka bon.
Fɛn koloma minnu bɛ nɔ bila fɛnw dilanni na
1. Materiel raw Ratio : Isosiyanate index (NCO/OH ratio) bɛ nɔ bila poliyuritan ka crosslinking density la k’a ɲɛsin a ma, o la, a bɛ nɔ bila pipe gɛlɛya ni a lasticity la.
2. Funteni kɔlɔsili: Ni nɔgɔ funteni ka bon kojugu, o bɛ se ka kɛ sababu ye ka bugun tolenw walima a yɔrɔ nafama dɔw bila, ka sɔrɔ funteni dɔgɔya kojugu bɛ kɛnɛya waati janya.
3. Nɔgɔ dilanni: Ni bolibaga dilanni ni fiɲɛbɔcogo bɛnnen bɛ se ka dɔ bɔ fiɲɛw la ani ka fɛn dilannenw kɛcogo ɲɛ.
4. Furakɛli kɔfɛ-: Poliyuritan pibiliki dɔw mago bɛ vulcanization kɔfɛ-(i n’a fɔ CPU pipew) walasa ka funteni kunbɛnni ni masinko kɛcogo ɲɛ.
Poliyuritan pibilikiw dilanni taabolo sugandili bɛ jateminɛ kɛ kosɛbɛ fɛn dilannenw baarakɛcogo wajibiyalenw na, u dilanni hakɛ, ani musakaw. Casting bɛnnen don pipew ma minnu bɛ se ka kɛ fɛn ye min ka gɛlɛn, minnu ka gɛlɛn-, extrusion bɛnnen don fɛn dilanni ma min bɛ kɛ ni sariya ye, ka sɔrɔ RIM (Reverse Molding Injection) nafa bɛ pipe belebelew dilanni na, minnu ka baara ka bon-. Don nataw la, ni poliyuritan fɛnw caman cili fɛɛrɛ yiriwali ye, fɛn dilanni taabolo bɛna ɲɛ ka taa a fɛ walasa ka izini baarakɛcogo wajibiyalenw dafa minnu ka gɛlɛn kosɛbɛ.
