Liquid Silicone Rubber yog dab tsi?
Ua kua silicone roj hmab(LSR) tsis yog silicone roj hmab hauv cov kua dej xwb. Hloov chaw, nws yog tsim los ntawm kev kho cov pob txha ntev polysiloxane siv platinum thiab peroxide hauv silicone roj hmab. Cov catalysts tsim crosslinks uas txhawb nqa lub zog tensile thiab tsim kua muag ntawm lub elastomer.
Raws li qhov tshwm sim, LSR muaj cov luv luv polymer chains nrog qhov hnyav molecular. Tsis tas li ntawd, hom silicone roj hmab no muaj cov khoom ntws zoo dua.
LSR yog ua tiav los ntawm kev txhaj tshuaj molding kua. Ua ntej, cov khoom siv ua kua yog sib xyaw ua ke hauv qhov sib npaug ntawm ob qhov sib cais. Tom qab ntawd nws yog txhaj rau hauv pwm kub los ntawm lub tshuab khiav txias. Vim qhov tsim tau yooj yim, LSR txhaj tshuaj molding yog tsim rau kev tsim cov khoom lag luam nrog cov geometry nyuaj hauv ntau qhov ntau.
Dab tsi yog qhov txawv ntawm Liquid Silicone Rubber?
Liquid Txhaj Moulding (LIM)
Liquid txhaj molding LSR yog tsim los siv cov txheej txheem ua kua. Cov txheej txheem tsim cov khoom siv roj hmab zoo nrog cov qauv tsim thiab sib txawv.Tsis tas li ntawd, LIM LSR yog biocompatible, zoo ib yam, thiab meej.Kev tsim qauv yooj yim ntawm cov elastomer no ua rau nws zoo tagnrho rau kev tsim cov khoom ntawm ntau cov duab thiab ntau thiab tsawg.
Chav Kub Vulcanizing (RTV)
Chav kub vulcanizing LSR yog ib hom LSR uas kho nyob rau hauv chav tsev kub tsis tas yuav tsum tau cua sov ntxiv. Feem ntau, thaum lub sij hawm tsim khoom ntawm RTV LSR, platinum catalyst yog siv los ua cov roj hmab tawv.
Yog li ntawd, RTV LSR yog qhov tsim nyog rau cov ntawv thov uas tsis xav tau cua sov. Cov khoom ntawm LSR no suav nrog cov txheej txheem qis qis, tshuaj lom neeg tsis kam, hluav taws xob rwb thaiv tsev, thiab siab thermal stability.
Fluorosilicon Roj Hmab (FSR)
Cov qauv molecular ntawm fluorosilicone LSR muaj fluorine. Fluorine txhawb nqa cov khoom ntawm LSR, txhim kho nws cov tshuaj, roj, thiab roj kuj. Tsis tas li ntawd, hom LSR no tuaj yeem tiv taus qhov kub thiab txias thiab muaj lub cev zoo xws li kev yooj yim thiab lub zog tsim kua muag.
Vim tias fluorosilicone LSR tuaj yeem tiv taus qhov kub thiab txias, nws yog siv rau hauv sealing thiab gasket daim ntawv thov nrog huab cua kev ua haujlwm.
Self-Boding LSR
Self-bonding LSR tuaj yeem ua raws li lwm cov substrates yam tsis xav tau tus neeg sawv cev sib txuas. Hom LSR no muaj cov khoom siv silicone reactive uas txhim kho adhesion rau ntau lub substrates, suav nrog iav, hlau, thiab yas.
Tsis tas li ntawd, hom LSR no kho tau sai thiab muaj qhov yoog raws thiab tshuaj lom neeg.Self-bonding LSR yog tshwj xeeb tshaj yog haum rau ntau tshaj-moulding daim ntaub ntawv thiab daim ntaub ntawv uas yuav tsum tau sib txuas ob yam khoom sib txawv, nrog rau silicone roj hmab.
Qib Kho Mob LSR
Cov txheej txheem tsim khoom rau qib kho mob LSR ua raws cov cai nruj kom ntseeg tau tias nws tsim nyog rau kev siv kho mob. Hom LSR no yog biocompatible, tsis muaj tshuaj lom, thiab nws tsis muaj menyuam.
Dab tsi yog Qhov Zoo ntawm Liquid Silicone Rubber?
Lub cev muaj zog:kua silicone roj hmab muaj lub cev zoo heev uas paub qhov txawv ntawm lwm cov elastomers. Cov khoom no yog hloov tau thiab tuaj yeem ua rau ntau qhov duab thiab ntau thiab tsawg. Tsis tas li ntawd, cov kua roj hmab silicone yog siv rau ntau daim ntawv thov kev lag luam kub vim nws cov kav ntev thiab kub ua haujlwm.
Biocompatibility:LSR yog biocompatible thiab inert. Cov elastomer no tsis hnov mob nrog cov kua hauv lub cev lossis ua rau muaj kev tsis haum tshuaj. Ntxiv nrog rau nws cov biocompatibility, LSR tuaj yeem ua kom tsis muaj menyuam yam tsis hloov nws lub cev lossis tshuaj lom neeg. Cov elastomer no yog siv rau hauv kev lag luam kho mob los tsim ntau yam khoom siv kho mob, suav nrog kev cog hniav, ua pa, kho hniav, thiab cov khoom siv orthopedic. Cov cuab yeej no txhim kho lub neej zoo, nplij cov neeg mob thiab txo qhov kev pheej hmoo ntawm kev tsis haum tshuaj.
Chemical Resistance:LSR muaj cov tshuaj tiv thaiv zoo heev, ua rau nws zoo tagnrho rau kev siv tshuaj lom neeg. Cov tshuaj tiv thaiv ntawm LSR yog vim nws cov qauv molecular hloov tau yooj yim thiab nws cov elongation siab thaum tawg. Cov elastomer no yog siv nyob rau hauv aerospace, electronics, thiab automotive industries.Tsis tas li ntawd, nws yog siv los tsim cov khoom lag luam, suav nrog cov ntsaws ruaj ruaj, o-rings, thiab gaskets rau qhov chaw hnyav.
Tsim Flexibility:LSR yog hloov tau thiab tuaj yeem ua rau cov duab sib txawv thiab ntau thiab tsawg. Qhov no elastomer muaj ib tug tsawg viscosity thiab siab precision. Yog li ntawd, nws puv pwm los tsim intricate designs nrog zoo ib yam. Kev tsim qauv yooj yim ntawm LSR feem ntau yog siv hauv kev kho mob, cov khoom siv, thiab kev lag luam tsheb.
Dab tsi yog Cov Kev Siv Feem Ntau ntawm Liquid Silicone Rubber?
Raws li tau tham dhau los, cov khoom ntawm LSR ua rau nws zoo tagnrho rau ntau yam kev siv. Cov kev lag luam sib txawv uas siv cov elastomer no suav nrog:
Automotive: Automotive seals thiab gaskets yog tsim los ntawm LSR. Qhov elastomer no kuj tseem siv los tsim cov khoom vibration-damping thiab cov khoom sib txuas.
Aerospace:LSR yog siv los tsim tubings, ntsaws ruaj ruaj, thiab gaskets rau kev siv dav hlau.
Electronics: Cov khoom siv hluav taws xob xws li cov ntsaws ruaj ruaj, cov khoom sib txuas, thiab cov keypads yog tsim los ntawm cov ntaub ntawv LSR
Cov khoom siv: LSR yog siv rau hauv kev lag luam cov khoom siv los tsim cov khoom siv hauv chav ua noj, cov khoom ua si, cov khoom me me
Kev kho mob: Cov cuab yeej phais, catheters, qhov ncauj qhov ntswg, cov twj tso kua mis, cov raj kho mob, thiab cov koob txhaj tshuaj yog qee cov khoom siv kho mob LSR tsim los ntawm cov kua roj hmab silicone.
Yuav Ua Li Cas Liquid Silicone Rubber Khoom?
Cov kua roj hmab silicone yog hloov tau thiab tuaj yeem ua rau cov khoom sib txawv siv ntau yam txheej txheem. Cov txheej txheem ntawm kev tsim LSR suav nrog kev txhaj tshuaj, compression, thiab hloov molding.
Txhaj Molding
Kev txhaj tshuaj molding txheej txheem txhaj LSR sib xyaw rau hauv pwm kab noj hniav. Qhov molding no feem ntau yog nyob rau hauv cov duab ntawm cov khoom xav tau. Thaum lub elastomer puv cov pwm, nws pib kho thiab solidify. Nyob ntawm seb hom LSR siv, kho lub sijhawm sib txawv. Tom qab LSR kho, nws raug tso cai kom txias thiab ua kom khov ntxiv.
Cov khoom siv roj hmab txhaj tshuaj yog tom qab ntawd tshem tawm cov pwm thiab ua tiav. Kev ua tiav cov khoom siv roj hmab yuav suav nrog kev siv cov txheej txheem los yog txiav tawm cov khoom siv ntau dhau.
Txhaj tshuaj molding yog ib txoj hauv kev siv roj hmab uas tsim cov khoom lag luam zoo nrog rau kev ua siab ntev thiab cov khoom pov tseg tsawg. Cov txheej txheem yog qhov ua tau zoo thiab raug, ua rau nws yog qhov tsim nyog rau kev tsim khoom loj. Txawm hais tias nws qhov zoo, kev txhaj tshuaj molding muaj qee qhov kev txwv xws li cov nqi siab ua ntej, lub sijhawm ua haujlwm ntev dua, thiab cov khoom siv tsawg.
Compression Moulding
Hauv compression molding, LSR sib tov tsis yog txhaj rau hauv pwm. Hloov chaw, nws yog ua ua ntej muab tso rau hauv ib lub pwm kab noj hniav. Tom qab kaw lub pwm kab noj hniav, cov khoom siv tau txais kev kub siab thiab kub siv los ntawm hydraulic xovxwm.
Cov txheej txheem no ces kho thiab solidifies cov khoom. Tom qab solidification thiab txias, cov khoom siv roj hmab tiav raug tshem tawm.
Tsis zoo li kev txhaj tshuaj molding, compression molding muaj tus nqi qis dua. Cov txheej txheem kuj tsim cov khoom pov tseg tsawg, thiab cov khoom tiav muaj zog tensile siab. Txawm li cas los xij, compression molding muaj lub sij hawm txhuas ntev dua li kev txhaj tshuaj molding, thiab cov txheej txheem tsis tshua muaj tseeb.
Hloov Molding
Nyob rau hauv cov txheej txheem molding, LSR yog tov nrog pigments thiab curing agents ua ntej nws rhuab. Tom qab ntawd cov khoom yog loaded nyob rau hauv ib tug hloov lub lauj kaub thiab muab tso rau hauv ib tug xovxwm.
Tom qab siv lub zog rau lub lauj kaub hloov, ib qho sprue yuam cov khoom LSR rau hauv pwm kab noj hniav. Tom qab ntawd cov pwm yog rhuab mus kho thiab solidify lub elastomer. Tom qab kho, cov khoom kawg raug tshem tawm.
Hloov molding yog tsim rau kev tsim cov duab ntawm lub zog siab. Tsis tas li ntawd, cov txheej txheem muaj siab precision thiab zoo ib yam. Txawm li cas los xij, qhov tsis zoo ntawm kev hloov molding yog tias nws tsuas yog tsim nyog rau kev tsim khoom me me thiab muaj peev txheej pib siab.
Cov lus hauv qab no qhia txog qhov sib txawv ntawm kev txhaj tshuaj molding, compression molding, thiab hloov molding
| Txoj kev | Qhov zoo | Qhov tsis zoo |
| Txhaj Molding | Tus nqi ntau lawm Precise tswj cov khoom ntws Tsawg kawg nkaus |
Complex thiab kim machinery Kev xaiv cov khoom siv tsawg |
| Compression Moulding | Siab ntim ntau lawm Kev siv cov khoom siv zoo Kev siv hluav taws xob tsawg |
Tsawg qhov tseeb qhov tseeb Lub sijhawm ua haujlwm ntev dua Kev xaiv cov khoom siv tsawg |
| Hloov Molding | Siab ntim ntau lawm Precise tswj cov khoom ntws Tsawg kawg nkaus |
Complex thiab kim machinery Kev xaiv cov khoom siv tsawg Lub sijhawm ua haujlwm ntev |
Xaus
Cov kua roj hmab silicone muaj ntau yam thiab siv rau kev tsim ntau yam khoom hauv ntau qhov kev lag luam.
Vim nws cov khoom zoo heev, cov khoom siv tsim nyog rau kev kho mob, tsheb, khoom noj khoom haus, thiab kev siv khoom siv. Vim tias muaj ntau hom LSR, xaiv ib qho uas haum rau koj daim ntawv thov thiab txheej txheem molding yog qhov zoo tshaj.