ABS yas ntawv yog engineering yas copolymerized los ntawm acrylonitrile, butadiene, thiab styrene. Lawv muaj qhov sib npaug ntawm cov cuab yeej cuab tam ntawm toughness, hardness, thiab rigidity. Lawv qhov yooj yim yog ib qho ntawm lawv cov txiaj ntsig tseem ceeb tshaj li cov ntawv yas zoo tib yam, ua rau lawv yoog raws cov kev xav tau hauv ntau yam xwm txheej xws li kev tsim khoom thiab kho kom zoo nkauj. Kev nkag siab txog lawv qhov yooj yim thiab kev paub txog txoj kev khoov kom raug tuaj yeem ua kom cov khoom zoo tshaj plaws thiab zam kev ua haujlwm poob.
Qhov yooj ntawm ABS cov ntawv yas yog cuam tshuam zoo heev los ntawm cov tuab, cov khoom muaj pes tsawg leeg, thiab kev ua haujlwm. Nyias-cov ntawv phab ntsa nrog cov tuab tuab ntawm 1-3mm tuaj yeem ncaj qha txias-khoov, nrog lub vojvoog dabtsi yog khoov tsis pub tsawg dua 5 npaug ntawm daim ntawv tuab kom tsis txhob nkig lossis xim dawb. Cov nplooj ntawv tuab tshaj 3 hli hauv thickness yuav tsum tau preheating ua ntej khoov; txwv tsis pub, kev ntxhov siab sab hauv tuaj yeem yooj yim ua rau deformation thiab tawg. Lawv lub zog dabtsi yog khoov tuaj yeem ncav cuag 60 txog 80 MPa, tso cai rau lawv tiv taus qee yam sab nraud yam tsis muaj kev tawg yooj yim. Tsis tas li ntawd, lawv tswj tau zoo toughness thiab seem stability nyob rau hauv ib tug kub ntawm -50℃mus rau 70 degree, thiab lawv dabtsi yog khoov kev kawm tsis yooj yim cuam tshuam los ntawm kub hloov. Qhov no yog ua tsaug rau lub toughness muab los ntawm butadiene thiab cov txheej txheem zoo ntawm styrene.
Muaj ob txoj hauv kev tseem ceeb rau kev khoov cov ntawv yas ABS: txias khoov thiab khoov kub. Kub dabtsi yog khoov yog siv dav dua thiab tuaj yeem ua raws li qhov sib txawv thicknesses thiab dabtsi yog khoov cov ces kaum. Txias dabtsi yog khoov tsuas yog haum rau nyias - cov ntawv phab ntsa ntawm 1-3 hli. Nws yog ib qho yooj yim thiab yooj yim: ua ntej, kos ib txoj kab ncaj nraim nrog tus cwj mem raws li qhov yuav tsum tau ua; kho daim ntawv ntawm lub rooj ua haujlwm; maj mam siv lub zog ntawm tes los yog nrog lub cuab yeej yooj yim; tom qab khoov rau lub kaum sab xis xav tau, kho nws nrog clamp; thiab cia nws txias rau 10-20 feeb los teeb. Tsis xav tau cov cuab yeej ntxiv, ua rau nws tsim nyog rau kev ua haujlwm yooj yim.
Kub dabtsi yog khoov yog haum rau ABS nplooj ntawv ntawm tag nrho cov thicknesses. Lub hauv paus ntsiab lus tseem ceeb yog ua kom cov ntawv mos los ntawm cov cua sov tsis sib xws, tsis txhob muaj cua sov hauv cheeb tsam uas tuaj yeem ua rau cov xim tsis zoo lossis decomposition. Cov cuab yeej siv feem ntau suav nrog rab phom cua sov lossis cua sov hlau. Ua ntej cua sov, daim ntawv yuav tsum muaj kev ntxhov siab -relieved los tiv thaiv deformation thaum ua. Thaum lub sijhawm ua haujlwm, npog thaj chaw uas tsis tas yuav tsum tau khoov nrog cov ntaub thaiv npog; Ua kom sov cov kab sib npaug sib npaug, tswj qhov kub ntawm 80-120 degree; tsis tu ncua txav lub cuab tam thaum lub sij hawm cua sov kom paub meej txawm tias cua sov. Thaum lub saum npoo ntawm daim ntawv softens thiab tau yooj yim deformed ntawm tes, tam sim ntawd khoov nws mus rau lub preset lub kaum sab xis thiab kho nws nrog ib tug txuam pwm los yog clamp. Cia nws txias rau yam tsawg kawg 30 feeb kom txog thaum tag nrho teeb. Tshem lub clamp thiab thaum kawg xuab zeb cov npoo los txhim kho kev zoo nkauj.
Ob lub ntsiab lus tseem ceeb uas yuav tsum nco ntsoov thaum khoov: Ua ntej, cov cua kub yuav tsum tsis txhob siab dhau, txwv tsis pub nws yuav ua rau wrinkling thiab decomposition ntawm daim ntawv nto; Thib ob, daim ntawv yuav tsum tsis txhob txav mus los thaum lub caij txias kom tsis txhob muaj qhov rov qab thiab deformation. Tsis tas li ntawd, daim ntawv yuav tsum muab khaws cia rau hauv qhov chaw qhuav thiab zoo- qhov cua, tsis txhob muaj hluav taws xob ncaj qha ultraviolet uas tuaj yeem ua rau embrittlement thiab cuam tshuam rau nws txoj kev khoov.
Hauv cov ntsiab lus, ABS cov ntawv yas muaj qhov kho tau zoo heev; nyias-cov ntaub ntawv phab ntsa tuaj yeem txias- khoov, thiab cov nplooj ntawv tuab tuaj yeem kub- khoov, hloov mus rau ntau yam kev xav tau. Mastering txoj kev khoov kom raug thiab tswj cov cua kub, khoov lub vojvoog, thiab lub sijhawm txias tso cai rau kev ua haujlwm zoo, siv nws qhov zoo ntawm kev sib sib zog nqus, tawv, thiab yooj yim rau txheej txheem, muab cov khoom siv txhim khu kev qha rau ntau yam kev tsim khoom thiab lub neej txhua hnub.
