Common Challenges nyob rau hauv ABS Txhaj Moulding thiab yuav daws lawv li cas

Taw qhia
ABS (Acrylonitrile Butadiene Styrene) yog ib qho ntawm cov thermoplastics nrov tshaj plaws siv hauv kev txhaj tshuaj molding. Nws yog lub npe hu rau nws lub zog, toughness, thiab versatility, ua rau nws haum rau automotive qhov chaw, cov neeg siv khoom siv hluav taws xob, thiab cov ntawv thov kev lag luam. Txawm li cas los xij, zoo li txhua yam khoom siv, ABS los nrog nws tus kheej cov teeb meem thaum lub sij hawm txhaj tshuaj molding txheej txheem. Kev nkag siab txog cov teeb meem no - thiab yuav daws li cas - tuaj yeem pab cov tuam txhab txhim kho kev ua tau zoo, txo qhov tsis xws luag, thiab ua kom zoo ib yam.

Warping thiab Shrinkage
Ib qho kev nyuaj tshaj plaws hauv ABS txhaj tshuaj molding yog warping los yog tsis sib xws shrinkage. Qhov no tshwm sim thaum sib txawv ntawm qhov chaw txias ntawm cov nqi sib txawv, ua rau muaj qhov tsis raug.

Kev daws: Siv cov pwm tsim kom zoo nrog cov phab ntsa tuab, kho cov cua txias, thiab ua kom zoo dua pwm kub. Kev tswj cov ntim siab kuj pab txo qis shrinkage thiab ua kom muaj qhov ruaj khov.

Qhov Defects
ABS cov khoom feem ntau raug xaiv rau lawv qhov ua tiav, tab sis cov teeb meem saum npoo xws li cov cim dab dej, cov kab sib txuas, lossis cov kab ntws tuaj yeem cuam tshuam rau ob qho tib si tsos thiab kev ua haujlwm.

Kev daws: Txhawm rau txo qhov tsis xws luag, tswj qhov kub thiab txias kom zoo, xyuas kom lub qhov rooj nkag tau zoo, thiab siv cov pwm polishing thaum tsim nyog. Lub tshuab nqus tsev vacuum tuaj yeem tshem tawm cov huab cua uas ua rau muaj kev puas tsuaj.

Moisture Sensitivity
ABS yog hygroscopic, txhais tau tias nws absorbs noo noo los ntawm huab cua. Yog tias tsis ua kom qhuav ua ntej molding, noo noo tuaj yeem ua rau npuas, splay, lossis tsis muaj zog txhua yam.

Kev daws: Ib txwm ua kom qhuav ABS resin ntawm qhov kub thiab txias (feem ntau 80-90 ° C rau 2-4 teev) ua ntej ua. Siv cov ntim ntim kaw kom khaws cov resin tiv thaiv kom tsis txhob ya raws.

Siab pwm kub rhiab heev
ABS xav tau kev tswj qhov kub thiab txias. Yog tias pwm los yog chim kub siab dhau lawm, nws tuaj yeem ua rau degradation thiab discoloration. Yog tias qis dhau, nws yuav ua rau tsis tiav filling lossis adhesion tsis zoo.

Kev daws: Khaws cov pwm kub kom ruaj khov nyob rau hauv lub qhov rais ua haujlwm pom zoo. Tsis siv neeg xyuas cov tshuab tuaj yeem ua kom muaj kev sib xws thaum lub sijhawm tsim khoom.

Dimensional raug
Vim tias ABS tau dav siv rau qhov chaw uas yuav tsum tau ua kom nruj, kev tswj xyuas qhov tseeb ntawm qhov yuav nyuaj. Kev hloov pauv hauv qhov siab, qhov kub thiab txias, lossis cov khoom ntws tuaj yeem ua rau tsis muaj qhov tshwj xeeb.

Kev daws: Siv scientific molding cov tswv yim xws li kab noj hniav siab xyuas, thiab xyuas kom meej tias cov cuab yeej pwm raug tswj kom zoo. Siv CAE (computer-aided engineering) simulations thaum lub sij hawm tsim los kwv yees tej zaum yuav shrinkage.

Environmental Stress Cracking
ABS tuaj yeem nkag siab rau qee yam tshuaj, roj, lossis kev ntxhov siab tas mus li, ua rau tawg mus rau lub sijhawm.

Kev daws: Hloov kho qhov tsim kom txo qis kev ntxhov siab, siv ABS sib xyaw nrog kev ua haujlwm siab dua, thiab ua kom muaj kev sib raug zoo nrog ib puag ncig.

Xaus
ABS txhaj tshuaj molding muaj lub sijhawm zoo rau kev tsim cov khoom ruaj khov, muaj ntau yam, tab sis cov teeb meem xws li warping, nqus dej noo, thiab qhov tsis xws luag yuav tsum tau tswj kom zoo. Los ntawm kev siv cov kev coj ua zoo tshaj plaws xws li kev npaj cov khoom tsim nyog, txhim kho pwm tsim, thiab tswj qhov kub thiab txias, cov tuam txhab tuaj yeem kov yeej cov teeb meem no thiab ua tiav cov txiaj ntsig zoo, zoo ib yam.