Ntev fais fab kev siv zog thermoplastics (LFT) tau siv hauv kev lag luam automobile rau cov qauv siv rau txheej txheem semi-structural. Lawv qhov zoo tshaj plaws yog cov nqi txaus nyiam / kev ua yeeb yam thiab tsawg tsawg ntom ntom nti. Cov European ELV (qhov kawg ntawm lub neej tsheb) tsim txoj kev loj hlob ntawm cov khoom siv no, uas txhawb kev ua dua thiab yog li txhawb kev hloov cov thermoset cov ntaub ntawv los ntawm cov ntaub ntawv thermoplastic.
Nyob rau hauv kev lag luam automotive, LFT yog siv los ua cov qauv thiab cov qauv ua ib nrab ntawm cov qauv xws li cov qauv hauv pem teb, bumper girders, dashboard skeletons, roj teeb, cov log tsheb spare, rooj zaum, ko taw ped thiab vaj huam sib luag. Cov khoom siv ntev ntev coj los siv rau hauv cov hoods, dashboard skeletons, roj teeb lub rooj, lub rooj zaum, tsheb pem hauv ntej, tho qhov chaw, hnab looj plag, cov chaw muag khoom, cov kiv cua, lub tshuab chassis, lub tsev rau sab hauv, thiab lwm yam .; LFT-PA tsis tsuas yog muaj zog, tsis muaj hnyav, tab sis tseem lub iav fiber ntau cov ntsiab lus, nws cov thermal expansion coefficient yog yuav luag tib yam li cov hlau, tuaj yeem tiv thaiv lub siab coj los ntawm lub cav.
Ob lub ntsiab lus tseem ceeb ntawm LFT raug piav qhia hauv qab no. LFT-G yog qhov tshwm sim ntawm kev nrhav hauv cov iav fiber ntau thermoplastic khoom siv (FRTP). Txawm hais tias qhov ntev ntawm FRTP pellets ntxov tuaj yeem ncav 5-6 hli, tom qab tus txheej txheem kev tov, pelletizing, yas tshuaj, tshuaj molding, thiab lwm yam., Qhov kawg ntawm cov fibers hauv cov khoom no feem ntau tsawg dua 1 hli, uas tsuas siv tau raws li ib tug muab tub lim los ua kom lub rigidity ntawm cov khoom. Txawm li cas los xij, kev txhim kho hauv lub zog tensile thiab kev ua haujlwm tsis zoo yog qhov tsawg heev. Yog li ntawd, thaum lub sij hawm FRTP tsis yog cov ntaub ntawv tseem ceeb. Yuav kom muab tag nrho cov kev ua si mus rau qhov zoo ntawm cov khoom tsim tau yooj yim thiab cov nqi txhaj tshuaj molding, kev ua kom tau los txo cov teeb meem ntawm cov txhuam hniav. LFT-G yug nyob rau xyoo 1980s. LFT-G khoom yog tsim nyob rau hauv ib tus txheej txheem zoo li GMT thiab yuav tsum muaj ob txoj kev paub tab, namely ntev m-molding thiab txhaj tshuaj molding lossis compression molding ntawm cov khoom.
Cov LFT-G pellets muaj ib txoj kab uas siv li ntawm 3 hli thiab ntev ntawm 12 hli thiab 25 hli. Ntawm lawv, pellets ntawm txog 12 hli ntev yog siv rau kev txhaj tshuaj molding, thaum pellets ntawm txog 25 hli ntev yog siv rau compression molding. Nyob rau hauv LFT-G pellet txhaj molding txheej txheem, txawm hais tias cov tshuaj molding tshuab tau undergone ntau txhim kho, nws muaj kev txwv rau kev txhaj molding txheej txheem, thiab cov fiber ntau tsuas ncav cuag 3.2 mus 6.4 hli hauv qhov kawg khoom.
