Cov tshuaj molding compound yog hais txog cov polyester resin tsis muaj roj ua lub cev tseem ceeb, ntxiv cov neeg sawv cev kho, cov neeg sawv cev tso pwm, cov khoom sau, cov neeg sawv cev qis qis, cov khoom ua kom tuab, thiab lwm yam. Cov tshuaj molding compound npog nrog polyethylene (PE) zaj duab xis. Daim ntawv no feem ntau piav qhia luv luv txog kev sib xyaw thiab kev faib tawm ntawm SMC.
Cov Khoom Siv Sheet Molding Compound
SMC yog tsim los ntawm cov tshuaj polyester tsis muaj roj, tus neeg sawv cev sib txuas, tus pib, tus sau, tus ua kom tuab, tus neeg sawv cev tso tawm, iav fiber, thiab cov tshuaj tiv thaiv polymerization. Ntawm lawv, plaub pawg thawj zaug feem ntau muab cov khoom siv rau cov khoom thiab ua kom muaj zog. Plaub pawg kawg feem ntau yog rau cov yam ntxwv ntawm kev nce viscosity, kev tiv thaiv corrosion, rwb thaiv tsev, thiab kev ruaj khov ntawm cov khoom.
1. Cov tshuaj polyester tsis muaj roj thiab cov neeg sawv cev sib txuas yog lub cev tseem ceeb ntawm SMC. Cov tshuaj polyester tsis muaj roj feem ntau yog polycondensed los ntawm cov kua qaub dicarboxylic tsis muaj roj (lossis anhydrides), cov kua qaub dicarboxylic tsis muaj roj (lossis anhydrides), thiab polyols. Nws muaj qee yam khoom siv thiab lub zog, thiab lub zog sab hauv yog sib xws. Tus neeg sawv cev sib txuas feem ntau yog styrene. Tom qab ob qho sib txuas, lawv yog cov khoom siv tseem ceeb rau kev kho cov khoom yas, uas ua lub luag haujlwm ntawm kev sib txuas, kev txhawb nqa, kev sib kis, thiab kev tiv thaiv.
2. Tus neeg pib ua rau cov resin thiab crosslinker kho thiab tsim nyob rau theem resin paste. Nws lub luag haujlwm yog ua kom cov resin thiab ob chav sib txuas hauv cov monomer cross-linking xws li styrene copolymerize kom SMC tuaj yeem khov thiab tsim nyob rau hauv lub pwm qhov.
3. Cov khoom siv filler siv ntau tshaj ib feem peb ntawm cov khoom siv molding thiab tuaj yeem kho qhov viscosity ntawm cov khoom siv molding. Feem ntau nws yuav tsum muaj cov yam ntxwv ntawm qhov hnyav tshwj xeeb qis, tus nqi nqus roj tsawg, qhov hws tsawg dua, tiv taus corrosion, thiab tus nqi qis. Cov khoom siv filler feem ntau yog CaCO3, Al(OH)3, thiab lwm yam.
4. Cov tshuaj ua kom tuab muab SMC muaj cov khoom ua kom muaj viscosity siab, tsis nplaum. Kev npaj cov ntawv thiab cov khoom sib xyaw ua ke yuav tsum muaj viscosity qis ntawm cov resin kom pab txhawb kev impregnation ntawm cov iav fiber thiab cov khoom sau los ntawm cov resin. Thiab compression molding xav tau viscosity siab dua. Yog li ntawd, nws yog qhov tsim nyog los ntxiv cov thickener ua ntej cov txheej txheem molding kom hloov cov viscosity qis ntawm cov iav fiber impregnation mus rau hauv cov viscosity siab uas tsis nplaum.
5. Tus neeg sawv cev tso tawm tiv thaiv cov tshuaj molding los ntawm kev sib raug zoo nrog qhov chaw ntawm cov pwm hlau. Tus neeg sawv cev tso tawm tuaj yeem tiv thaiv cov polyester resin tsis muaj roj los ntawm kev sib cuam tshuam nrog qhov chaw ntawm cov pwm hlau thaum lub sijhawm ua cov yas ntawm cov tshuaj sib xyaw. Feem ntau yog cov roj fatty acids ntev lossis cov ntsev uas sawv cev los ntawm zinc stearate. Kev siv ntau dhau yuav yooj yim txo qhov kev ua tau zoo ntawm cov khoom. Kev siv dav dav suav txog 1 ~ 3% ntawm tag nrho cov khoom kom ntseeg tau tias cov khoom zoo.
6. Cov iav fiber tuaj yeem txhim kho qhov kev tiv thaiv corrosion thiab cov khoom rwb thaiv tsev ntawm SMC. Cov ntawv molding compound feem ntau xaiv cov iav fiber mats txiav ua cov khoom txhawb nqa. Kev siv ntau dhau yuav ua rau cov khoom fluffy dhau, thiab kev siv me me dhau yuav tsis muaj qhov cuam tshuam pom tseeb rau cov khoom. Kev siv dav dav yog li 20%. Ua li no, cov khoom tuaj yeem ua tau raws li ob txoj hauv kev ntawm extrusion molding thiab compression molding tib lub sijhawm.
7. Tus neeg tiv thaiv ua rau SMC ruaj khov thiab ua kom lub sijhawm khaws cia ntev dua. Vim tias tus pib styrene yuav lwj qeeb qeeb, ua rau cov resin polymerization, ntxiv cov tshuaj dawb radical scavenger (polymerization inhibitor) kom tsim nyog tuaj yeem ua rau qeeb qeeb ntawm styrene decomposition thiab ua kom nws lub sijhawm khaws cia ntev dua. Cov neeg tiv thaiv feem ntau yog benzoquinones thiab polyvalent phenolic compounds.
Daim Ntawv Thov Cov Khoom Siv Sheet Molding Compound
SMC muaj qhov zoo ntawm kev ua haujlwm hluav taws xob zoo heev, tiv taus corrosion muaj zog, lub teeb yuag, yooj yim thiab yoog raws engineering tsim, thiab lwm yam. Nws cov khoom siv kho tshuab zoo ib yam li qee cov khoom siv hlau. Yog li ntawd, nws tau siv dav hauv yim qhov chaw xws li kev lag luam tsheb, tsheb ciav hlau, kev tsim kho, cov khoom siv hluav taws xob, thiab kev sib txuas lus (Rooj 1).
Ntawm lawv, thaum ntxov, nws feem ntau yog siv rau hauv daim ntawv ntawm cov laug cam rwb thaiv tsev hauv kev tsim kho, cov khoom siv hluav taws xob, thiab kev sib txuas lus, thiab cov thev naus laus zis tau loj hlob tuaj. Tom qab ntawd nws tau siv hauv kev lag luam tsheb los hloov ib feem ntawm cov hlau thiab txhuas alloy cov ntaub ntawv ntawm lub cev kom txo qhov hnyav ntawm lub tsheb.
Nyob rau hauv keeb kwm yav dhau los ntawm kev txuag hluav taws xob thiab txo cov pa phem tam sim no thiab kev tsim cov tsheb fais fab tshiab, cov thev naus laus zis ntawm cov khoom siv tsheb txuas ntxiv mus rau qhov sib dua thiab zoo. Txog rau tam sim no, kev siv cov ntaub ntawv SMC tuaj yeem pom txhua qhov chaw hauv lub neej txhua hnub. Nws tau pom nyob rau hauv kev sib txuas lus wireless, cov thawv hluav taws xob tsis tawg, cov ntaub ntawv rwb thaiv tsev hauv av, chav dej, thiab cov chaw tsheb ciav hlau ceev ceev.
Rooj 1 Yim daim ntawv thov tseem ceeb thiab cov teb faib ntawm SMC cov ntaub ntawv
| NO | Thaj teb | Kev faib ua pawg |
| 1 | Kev lag luam tsheb | Cov khoom ncua, cov dashboards; cov khoom ntawm lub cev thiab cov khoom sib xyaw; cov khoom hauv qab lub hood |
| 2 | tsheb ciav hlau | Cov thav qhov rai; Cov rooj zaum; Cov vaj huam sib luag thiab qab nthab ntawm lub tsheb thauj khoom; Cov khoom siv hauv chav dej |
| 3 | Kev tsim kho vaj tse | Lub taub dej; Cov khoom siv da dej; Lub taub dej khib nyiab; Cov qauv tsev; Cov khoom siv hauv chav cia khoom |
| 4 | Cov Khoom Siv Hluav Taws Xob thiab Kev Sib Txuas Lus | Cov thawv hluav taws xob; cov khoom siv hluav taws xob thiab cov khoom siv (cov cuab yeej rwb thaiv tsev) |
| 5 | Chav dej | Dab dej; Cov khoom siv da dej; Chav dej tag nrho; Cov khoom siv huv |
| 6 | Cov khoom siv hauv av | Pem teb tiv thaiv kev plam thiab tiv thaiv hluav taws xob |
| 7 | Lub thawv hluav taws xob uas tsis tawg | Cov khoom siv hluav taws xob uas tsis tawg |
| 8 | Kev sib txuas lus tsis siv xov tooj | FRP reflector antenna, thiab lwm yam |
Sau luv luv
Cov tshuaj polyester tsis muaj roj, tus neeg sawv cev sib txuas, tus pib, thiab cov khoom sau hauv cov ntawv molding compound muab cov khoom siv rau cov khoom thiab ua rau lub zog ntawm cov qauv. Cov khoom ua kom tuab, tus neeg sawv cev tso tawm, iav fiber, thiab cov tshuaj tiv thaiv polymerization ntxiv viscosity, corrosion resistance, insulation, thiab structural stability rau cov khoom. Cov khoom no tau siv rau hauv yim qhov chaw tseem ceeb suav nrog kev lag luam tsheb thiab tsheb ciav hlau. Nyob rau hauv keeb kwm yav dhau los tam sim no ntawm kev txuag hluav taws xob, kev tiv thaiv ib puag ncig, thiab kev siv hluav taws xob tsawg, kev lag luam tsheb tau muab cov kev xav tau siab dua thiab siab dua rau SMC cov ntaub ntawv vim lawv cov kev xav tau sib dua. Uas yog lub zog tseem ceeb rau kev txhim kho SMC thev naus laus zis.
Siv covtshuab hydraulic sib xyaw ua kekom nias cov khoom sib xyaw ua ke. Zhengxi yog ib tus kws tshaj lijHoobkas hydraulic xovxwm hauv Suav teb, muab cov tshuab luam ntawv zoo. Tiv tauj peb kom tau cov ntsiab lus ntxiv.
Lub sijhawm tshaj tawm: Tsib Hlis-17-2023
