Hnab xawsyog cov txheej txheem ntawm cov khoom ntim yas hloov tau yooj yim thiab ua tiav. Yog tias lub hnab xaws zoo tsis tsim nyog lossis kev noj ntau dhau, ces cov txheej txheem yav dhau los yuav raug pov tseg rau qhov zoo tshaj plaws, thiab cov neeg siv khoom hauv qab yuav thov cov nyiaj them poob haujlwm thiab muaj kev cuam tshuam loj rau kev tsim khoom thiab kev ua haujlwm ntawm lub tuam txhab.
Thaum tshav kub kub sealing yog qhov tshwm sim ntawm kev sib xyaw ua ke ntawm cov cua sov thiab lub zog. Ntawm qhov tod tes, ntawm qhov chaw sealing nyob rau hauv lub xeev molten, macromolecules diffuse, nkag mus thiab entangle nrog ib leeg kom ua tiav lub foob kaw; Ntawm qhov tod tes, polymer molecules nyob rau hauv lub xeev molten siv lub siab ntawm lub tshav kub sealing cuab yeej ua rau lub sab sauv thiab qis txheej ntawm zaj duab xis fuse rau hauv ib tug, thiab muaj peev xwm tuav ib tug tej lub zog tom qab txias thiab shaping.
Lub hnab xaws zoo thiab kub sealing zoo ntawm cov hnab ntim khoom sib xyaw muaj kev cuam tshuam zoo rau cov txheej txheem ntim khoom, kev thauj mus los, kev khaws cia cov ntsiab lus thiab kev faib khoom. Cov hauv qab no yog cov teeb meem thiab cov kev daws teeb meem uas yooj yim tshwm sim hauv cov txheej txheem ua lub hnab.
1. Tsis tiav thaum tshav kub kub sealing ua rau to los yog deterioration ntawm cov ntsiab lus.
Yog vim li cas: Cov yeeb yaj kiab muaj cov khoom tsis zoo los tiv thaiv kev ua qias tuaj thaum tshav kub kub sealing, feem ntau vim hais tias cov resin siv nyob rau hauv lub sealing txheej yog tsis haum.
Countermeasure: Siv cov yeeb yaj kiab uas muaj qhov zoo tiv thaiv kev ua qias tuaj thaum tshav kub kub sealing. Feem ntau hais lus, LDPE muaj qhov nruab nrab los tiv thaiv kev ua qias tuaj thaum tshav kub kub sealing zog, EVA muaj kev tiv thaiv kev ua qias tuaj thaum tshav kub kub sealing zog thaum VA cov ntsiab lus siab, LDPE kuj muaj cov khoom zoo tiv thaiv kev ua qias tuaj, thiab ionic resins thiab metallocene polymers muaj kev tiv thaiv zoo. pollution kub sealing zog.
2. Lub foob yog nkig thiab nkig.
Yog vim li cas:
(1) Lub tshav kub sealing kub yog siab dhau.
(2) Lub siab yog siab dhau.
(3) Lub sij hawm sib khi thaum tshav kub kub yog ntev heev.
(4) Lub ntug ntawm lub sealer sab sauv yog ntse dhau los yog cov txheej txheem polytetrafluoroethylene puas lawm.
(5) Cov roj hmab silicone ntawm lub foob hauv qab yog qhov nyuaj heev.
(6) Thaum lub sij hawm compounding thiab aging txheej txheem, ib feem ntawm cov nplaum nkag mus rau hauv zaj duab xis. Vim qhov nkag mus ntawm cov nplaum, qhov toughness (kev cuam tshuam tsis kam) ntawm cov substrate txo qis thiab cov brittleness nce.
(7) Tom qab txias thiab muab tso rau, lub tshav kub sealing lub zog ntawm lub hnab yas composite ntim nce, thiab nws kuj yuav ua nkig.
Kev tiv thaiv:
(1) Raws li cov yam ntxwv ntawm lub tshav kub sealing ntawm cov khoom ntawm lub puab sealing txheej, xaiv qhov tsim nyog ua kub, siab thiab kub sealing lub sij hawm.
(2) Txhim kho qhov chaw saum npoo ntawm cov cua sov sealing riam kom lub ntsej muag ntawm lub sealer du.
(3) qhwv nws nrog polytetrafluoroethylene daim ntaub.
(4) Xaiv lub silicone roj hmab ncoo uas tsim nyog hardness.
3. Sab nrauv contour ntawm lub tshav kub sealing nto yog tsis meej.(Lub riam qauv tsis meej)
Yog vim li cas:
(1) Lub sijhawm txias txias.
(2) Kev sib cuag tsis zoo ntawm lub phaj txias.
(3) Vim lub cua sov ntawm silicone ncoo, ntug yog ib nrab yaj.
(4) Lub longitudinal tshav kub sealing quab yuam yog tsis sib xws.
(5) Lub ntug ntawm lub tshav kub sealing riam yog tsis sib xws thiab blunt.
Kev tiv thaiv:
(1) Kho lub sijhawm txias.
(2) Kho lub phaj txias.
(3) Hloov los yog kho lub tshav kub sealing riam.
(4) Tiv thaiv ntug ntawm silicone ncoo los ntawm melting vim overheating.
4. Lub hnab warps tom qab tshav kub sealing.
Ua rau:
(1) Lub thickness ntawm cov zaj duab xis composite yog inconsistent.
(2) Lub tshav kub sealing kub yog siab dhau los yog lub sijhawm kub sealing ntev dhau lawm.
(3) Nyob rau hauv lub longitudinal tshav kub sealing riam ib feem, khiav khiav ntawm cov zaj duab xis composite tsis ncaj.
(4) Cov cua txias tsis txaus.
(5) Lub sijhawm laus tsis txaus.
(6) Cov zaj duab xis saum npoo av muaj cov cua sov tsis zoo.
(7) Kev tswj tsis raug ntawm qhov sib txuam ntawm qhov sib xyaw ua ke ntawm cov txheej txheem sib xyaw ua ke ua rau muaj kev ntxhov siab tom qab kev laus thiab ua kom zoo, tshwj xeeb tshaj yog thaum lub thickness ntawm cov zaj duab xis sib xyaw yog nyias. Qhov kev ua tsis tiav no yuav tshwm sim ntau dua.
Kev tiv thaiv:
(1) Kho qhov nro ntawm cov menyuam ntab.
(2) Xaiv lub sealing sab hauv substrate nrog qis-kub kub sealing zog.
(3) Kho cov cua sov sealing kub kom haum rau qhov kub thiab txias.
(4) Txias txaus.
(5) Kev laus txaus.
(6) Reselect lub nto substrate zaj duab xis.
Kho qhov nro ntawm txhua qhov ntawm cov khoom siv ua cov khoom sib xyaw kom sim ua kom lub shrinkage tus nqi ntawm ob qho sib xyaw substrates sib npaug.
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