Txhaj Moulding txheej txheem ntawm ABS yas

ABS feem ntau hu ua Acrylonitrile Butadiene Styrene, AcrylonitrileButadieneStyrenecopolymers yog tsim los ntawm copolymerizing peb monomers, acrylonitrile-butadiene-styrene. Qhov sib txawv ntawm peb cov copolymer monomers, tom qab ntawd sib xyaw nrog lwm cov yas thiab cov khoom siv ntxiv, yuav tsim cov khoom sib txawv, thaum nthuav dav kev siv thiab cov khoom ntawm ABS cov khoom. Piv txwv li, qib kub resistant, pob tshab qib, nplaim retardant qib, plating qib, cuam tshuam resistant qib, qib reinforced, thiab lwm yam.


1, ABS yas ziab kom qhuav

ABS yas yog hygroscopic thiab rhiab rau ya raws. Ua ntej ua, nws yuav tsum tau qhuav tag thiab preheated kom tsis txhob muaj dej vapor tshwm sim los ntawm cov nyiaj kab, fogging. ABS raw khoom ya raws yuav tsum tau tswj ntawm 0.13 feem pua ​​lossis tsawg dua.

ziab hauv lub caij ntuj no qis dua 75?80 degree rau 2?3 teev; nyob rau lub caij ntuj sov los nag ntawm 80?90 degree rau 4?8 teev; Yog tias cov txheej txheem nws tus kheej yog qhov nyuaj, nws tuaj yeem qhuav rau lub sijhawm ntev, txog 8?16 teev. Qhov xwm txheej no tso cai rau lub tshuab hopper hloov mus rau lub tshuab cua kub lub tshuab ziab khaub ncaws kom tiv thaiv cov khoom ABS los ntawm reabsorbing cov dej noo hauv lub hopper.

2. Kev txhaj tshuaj kub

Kev sib raug zoo ntawm qhov kub thiab txias viscosity ntawm ABS yas yog txawv ntawm lwm yam amorphous plastics. Thaum qhov kub ntawm cov txheej txheem melting nce, lub yaj viscosity yeej NW nyuam qhuav txo qis, tab sis thaum kub nce mus txog 220-250 degree, qhov muag tsis pom cua sov yuav mus ntxiv. thermal degradation ntawm ABS cov khoom, uas nyob rau hauv lem nce lub yaj viscosity,. Kev txhaj tshuaj molding yog qhov nyuaj dua. , mechanical zog ntawm ib feem yog txo.

Qhov kub nce ntau ntawm ABS txhaj tshuaj kub yog tsawg dua li ntawm polystyrene. Ntawm qee qhov ntsuas kub-tswj txhaj tshuaj molding tshuab, thaum muaj qee qhov ntawm cov khoom tsim tawm, cov khoom siv daj lossis xim av scorched yog tsim. Lub hauv paus ua rau yog tias cov khoom yas ua raws li qhov zawj ntawm qhov chaw uas tsis yooj yim ntxuav ntawm qhov kub thiab txias thiab degrade thiab carbonize ntawm qhov kub thiab txias dhau sijhawm.

Yog li, kev ua haujlwm ntawm qhov kub thiab txias yuav cuam tshuam rau cov khoom siv ABS, yog li nws yuav tsum txwv qhov kub ntawm txhua qhov ntawm lub thoob.

3, Txhaj tshuaj siab

ABS yaj txhaj tshuaj siv cov kev txhaj tshuaj siab dua, tab sis rau cov qauv me me, cov qauv yooj yim, cov khoom tuab tuaj yeem siv cov kev txhaj tshuaj qis dua. Thaum lub sij hawm txhaj tshuaj, lub siab nyob rau hauv lub pwm kab noj hniav txiav txim qhov zoo ntawm lub nto thiab cov degree ntawm silver-zoo li tsis xws luag.

Yog tias qhov siab qis dhau lawm, cov yas yuav poob qis heev thiab muaj feem ntau ntawm kev sib cais los ntawm cov kab noj hniav thiab qhov chaw ntawm qhov yuav zoo li pos huab. Lub siab ntau dhau yuav ua rau muaj kev sib txhuam ntawm cov yas thiab cov kab noj hniav, uas yuav ua rau cov pwm nplaum.

4, Txhaj ceev

ABS cov khoom siv feem ntau siv qhov nruab nrab txhaj tshuaj nrawm, tab sis qeeb qeeb yog siv hauv qib fireproof thiab qib siab dua kub. Nyob rau tib lub sijhawm, yog tias qhov yuav tsum tau ua rau saum npoo yog siab, nws yog qhov yuav tsum tau siv high-speed multi-stage txhaj tshuaj tswj tus nqi.

5, pwm kub

Txij li thaum ABS molding kub siab dua, pwm kub kuj tseem siab dua. Feem ntau, pwm kub tswj tau rau 75-85 degree . Thaum tsim cov khoom nrog qhov projection loj, pwm kub yog 70-80 degree thiab pwm kub yog 50-60 degree . Txhawm rau ua kom lub voj voog luv luv thiab tswj pwm qhov kub thiab txias, da dej txias, da dej kub lossis lwm yam kev kho tshuab tuaj yeem siv los ntxiv rau lub sijhawm txias txias tom qab tshem tawm.

6, Backpressure

Raws li txoj cai, qhov qis rov qab siab zoo dua, feem ntau 5 bar, thiab cov khoom siv dyed xav tau siab dua rov qab los ua kom cov khoom sib xyaw.

7, Kev tswj cov khoom lag luam

Txhawm rau kom tau txais qhov zoo ib yam thiab qhov ruaj khov, qhov ci ntsa iab rau, lub suab zoo ib yam, lub ntim ntim yuav tsum tau tswj ntawm 50 feem pua ​​​​ntawm cov nominal txhaj ntim.

8, Nyob rau lub sijhawm

Ntawm 265 degree, ABS tuaj yeem khaws cia rau hauv lub tog raj kheej yaj rau qhov siab tshaj plaws ntawm 5 mus rau 6 feeb. Cov nplaim hluav taws kub lub sij hawm luv dua. Thaum nws yog qhov tsim nyog los kaw lub tshuab, qhov ntsuas kub yuav tsum qis li 100 degree. Tom qab ntawd lub melting chim yuav tsum tau ntxuav nrog Universal ABS. Cov sib tov ntxuav yuav tsum tau muab tso rau hauv dej txias kom tsis txhob decomposition ntxiv. Yog tias cov khoom siv ABS yuav tsum tau hloov los ntawm lwm cov yas, cov kua nplaum yuav tsum tau ntxuav nrog PS, PMMA lossis PE.

Overheating ntawm lub yaj cartridge los yog ntau lub sij hawm nyob rau hauv yuav ua rau discoloration ntawm ib feem.

9, Tom qab ua tiav ntawm cov khoom

Feem ntau, ABS qhov chaw tsis xav tau kev kho mob tom qab. Tsuas yog cov khoom siv qib plating yuav tsum tau ci ntawm 70?80 degree rau 2?4 teev kom passivate nto cov cim thiab tsis muaj kev tso tawm tuaj yeem siv tau. Pob.

10, Moulding ceev faj

Tom qab plasticizer ABS plasticization, yaj adhesion rau saum npoo ntawm cov ntsia hlau yog qhov zoo. Kev tso kawm ntev ntev yuav ua rau decomposition. Nyob rau ntawm no, cov ntsia hlau homogenization seem thiab compression rub-tawm so test yog yuav tsum tau, thiab tsis tu ncua tu cov ntsia hlau nrog PS, thiab lwm yam.

Txhais nrog www.DeepL.com/Translator (dawb version)