Automotive khoom. Yuav thov li cas?
Txheem
Yuav ua li cas yug?
Automotive putties yog muag hauv ob daim ntawv: putty mass (los yog puag) thiab hardener. Lub hauv paus yog cov khoom siv yas uas muaj qhov zoo adhesion thiab pliability nyob rau hauv cov khoom siv sab nraud. Lub hardener yog siv los tig cov kua putty rau hauv ib qho khoom loj.
Feem ntau ntawm cov niaj hnub putties yog diluted raws li tib lub tswv yim: 2-4 grams hardener ib 100 grams ntawm putty. Nyob rau hauv cov ntaub ntawv no, qhov kev xaiv ntawm qhov tseeb proportions nyob ntawm seb huab cua tej yam kev mob thiab cov yuav tsum tau rau lub ceev ntawm solidification. Nyob rau hauv qhuav kub huab cua, 2 grams yog txaus. Yog tias huab cua ntub thiab txias, los yog yuav tsum tau kho kom sai, qhov kev faib ua feem tuaj yeem nce mus rau 4-5 grams ib 0,1 kg ntawm lub hauv paus.
Nws yog ib qho tsim nyog los sib tov lub hauv paus nrog hardener maj mam, nrog cov yas mos mos thiab ib txwm los ntawm tes. Nws yog tsis yooj yim sua kom tuav lub tsheb putty nrog mechanized txhais tau tias. Qhov no tuaj yeem saturate nws nrog huab cua, uas loosens lub hardened txheej ntawm lub workpiece.
Yog hais tias, tom qab ntxiv cov hardener thiab sib tov, lub putty tau txais ib tug pom tau tias reddish tint, koj yuav tsum tsis txhob siv nws. Nws yog qhov zoo dua los npaj ib feem tshiab. Cov hardener ntau dhau tuaj yeem ua rau cov xim liab pom los ntawm cov xim.
Lub tsheb putty nrog hardener qhuav ntev npaum li cas?
Tus nqi ziab ntawm automotive putty yog cuam tshuam los ntawm ntau yam:
- putty hom;
- tus nqi ntawm hardener;
- ambient kub
- huab cua humidity;
- thiab ua li ntawd.
Qhov nruab nrab, ib txheej ntawm putty dries li ntawm 20 feeb mus rau ib txheej ntawm lub zog txaus rau kev ua abrasive. Txawm li cas los xij, thaum thov ob peb txheej, lub sij hawm ziab tuaj yeem txo. Kev ua tiav lub zog yog nce hauv 2-6 teev.
Koj tuaj yeem ua kom cov txheej txheem ntawm polymerization ntawm putty nrog lub tshuab ziab khaub ncaws lossis lub teeb incandescent. Tab sis muaj ib qho caveat ntawm no: nws yog categorically tsis yooj yim sua kom qhuav thawj txheej, vim qhov no tuaj yeem ua rau nws tawg thiab tev. Thiab cov khaubncaws sab nraud povtseg yuav tsum sawv ntsug tsawg kawg 10 feeb tom qab daim ntawv thov yam tsis muaj kev cuam tshuam sab nraud. Tsuas yog tom qab thawj polymerization dhau lawm, lub putty raug tso cai kom qhuav me ntsis.
Nws siv sijhawm ntev npaum li cas rau fiberglass automotive putty kom qhuav?
Fiberglass fillers feem ntau yog siv los sau qhov sib sib zog nqus tsis sib xws. Lawv muaj lub zog tensile siab thiab tiv thaiv tawg zoo. Yog li ntawd, txawm tias ib txheej tuab ntawm putty nrog iav, tsis zoo li lwm hom, tsis tshua muaj peev xwm tev tawm ntawm qhov chaw kho.
Vim cov txheej tuab tuab, putty nrog iav yuav tsum tau siv sijhawm ntev dua. Cov tuam ntxhab sib txawv tshaj tawm cov nqi sib txawv rau lawv cov khoom. Tab sis nyob rau nruab nrab bodybuilders tiv taus fiberglass fillers 50% ntev dua.
Yuav ua li cas kom siv lub tsheb putty?
Muaj tsuas yog tsis muaj universal cov lus teb rau lo lus nug ntawm yuav ua li cas kom zoo putty. Txhua tus tswv ua haujlwm hauv nws tus kheej style. Txawm li cas los xij, muaj qee qhov kev pom zoo uas feem ntau ua raws li cov kws tsim lub cev.
- Ua haujlwm ua ntej cov lus nug ntawm qhov twg putty yog qhov zoo dua los tshem tawm qhov tsis xws luag hauv koj rooj plaub tshwj xeeb.
- Koj yuav tsum tau ua noj ntau npaum li putty nyob rau hauv ib lub sij hawm raws li yuav tsum tau ua ib lub caij los yog ib qho tsis xws luag. Lub hardener yuav tig lub putty mus rau hauv ib tug wax-zoo li loj tsis haum rau daim ntawv thov nyob rau hauv 5-7 feeb.
- Xaiv qhov tsim nyog spatula rau cov ntaub ntawv tshwj xeeb. Nws ua rau tsis muaj kev nkag siab txog kev ncab nrog spatula loj ntawm thaj tsam 3 zaug me dua li spatula nws tus kheej. Tib yam siv rau thaj chaw loj ntawm kev ua: tsis txhob sim rub lawv tawm nrog me spatulas.
- Tsis tas yuav sim tam sim nqa qhov chaw mus rau qhov zoo tshaj plaws nrog spatulas. Qhov tseem ceeb tshaj plaws yog sau qhov chaw tsis raug zoo thiab raug. Thiab microroughness thiab "snot" yuav raug tshem tawm nrog cov ntawv xuab zeb.
Cov kws paub txog lub cev ua haujlwm qeeb, tab sis tsis muaj kev so, nyob rau hauv lub moj khaum ntawm ib qho tsis xws luag.
Dab tsi ntawm cov ntawv xuab zeb los txhuam putty rau tsheb?
Thawj txheej ntawm automotive putty tom qab ziab yog ib txwm sanded nrog P80 sandpaper. Qhov no yog ib qho nyuaj-grained sandpaper, tab sis nws tuaj yeem yooj yim thiab ua tiav sai ntawm txheej txheej hauv qab.
Tsis tas li ntawd, cov nplej nrog txhua qhov kev ua haujlwm tom ntej nce los ntawm qhov nruab nrab ntawm 100 units. Qhov no yog hu ua "txoj cai ntawm ib puas". Ntawd yog, tom qab thawj zaug ntxhib grout, daim ntawv nrog cov nplej loj ntawm P180 lossis P200 raug coj mus. Tom qab peb nce mus rau P300-400. Koj tuaj yeem nres qhov ntawd. Tab sis yog hais tias ib tug zoo meej du nto yuav tsum tau, ces nws yuav tsis yog superfluous mus taug kev nrog ib tug finer-grained sandpaper.
Tom qab xuab zeb, nws raug nquahu kom yaug qhov chaw kho nrog dej.
