Cov teeb meem shrinkage ntawm kev ua hauj lwm txhaj tshuaj molded qhov chaw (surface shrinkage thiab internal shrinkage) feem ntau yog ib qho teeb meem tshwm sim los ntawm tsis txaus melt mov thaum lub tuab thiab loj qhov chaw txias.Peb qee zaum ntsib qhov xwm txheej uas txawm tias yuav ua li cas thiaj li ua kom lub siab, nce cov dej nkag, thiab ncua sij hawm txhaj tshuaj, qhov teeb meem shrinkage tsis tuaj yeem daws tau.Niaj hnub no, Xiaowei xav tham nrog koj yuav ua li cas los daws qhov teeb meem ntawm kev txhaj tshuaj molded qhov chaw.
1. Ob qhov kub thiab txias uas tsis haum rau kev daws qhov teeb meem shrinkage hauv cov txheej txheem txhaj tshuaj molding
Cov pwm kub tsawg dhau tsis haum rau kev daws qhov teeb meem ntawm qhov shrinkage
Qhov teeb meem shrinkage ntawm cov khoom yas tawv (surface shrinkage thiab internal shrinkage kab noj hniav) yog tshwm sim los ntawm qhov tseeb hais tias qhov chaw seem ntawm cov concentrated shrinkage tsis tuaj yeem ua kom tiav los ntawm cov yaj los ntawm cov kev taw qhia ntawm cov dej inlet thaum cov yaj shrinks thaum nws txias.Yog li ntawd, yam uas tsis haum rau kev pub mis yuav cuam tshuam rau peb los daws qhov teeb meem ntawm kev poob qis.
Yog tias pwm kub siab dhau lawm, nws yooj yim ua rau muaj teeb meem shrinkage.Feem ntau, cov neeg nyiam kom txo cov pwm kub los daws qhov teeb meem.Tab sis qee zaum yog tias pwm kub qis dhau, nws tsis yog qhov tsim nyog los daws qhov teeb meem ntawm qhov shrinkage, uas tsis pom los ntawm ntau tus neeg.
Cov pwm kub qis dhau lawm, cov kua nplaum yaj ua kom txias sai heev, thiab cov kua nplaum me ntsis thicker nyob deb ntawm cov dej nkag, vim tias qhov nruab nrab cua txias sai heev, cov khoom noj tau raug thaiv, thiab cov kua nplaum yaj tsis tuaj yeem yaj tag nrho hauv cov dej. nyob deb.Supplementation, ua rau cov teeb meem shrinkage nyuaj los daws, tshwj xeeb tshaj yog cov teeb meem shrinkage ntawm tuab thiab loj txhaj molded qhov chaw.
Tsis tas li ntawd, cov pwm kub yog qhov tsawg dhau, uas tsis yog qhov tsim nyog los ua kom tag nrho cov shrinkage ntawm kev txhaj tshuaj molded qhov chaw, ua rau cov concentrated shrinkage, thiab cov teeb meem shrinkage yog qhov hnyav thiab pom tseeb.
Yog li ntawd, thaum daws qhov nyuaj shrinkage teeb meem, nws yuav ua tau zoo kom nco ntsoov xyuas cov pwm kub.Cov kws tshaj lij feem ntau kov cov pwm kab noj hniav nrog lawv txhais tes kom pom tias nws txias dhau lossis kub dhau.Txhua cov khoom siv raw muaj nws qhov kub thiab txias.
2. Tsis tshua muaj melting kub nyob rau hauv cov txheej txheem txhaj tshuaj molding yog tsis conducive los daws qhov shrinkage teeb meem.
Yog hais tias qhov kub ntawm melting kub yog siab dhau lawm, qhov txhaj tshuaj molded qhov chaw yuav ua rau shrinkage.Yog tias qhov kub thiab txias tau qis dua 10 ~ 20 ° C, qhov teeb meem shrinkage yuav raug txhim kho.
Txawm li cas los xij, yog tias qhov kev txhaj tshuaj moulded shrinks nyob rau hauv ib qho thicker, kho cov melting kub tsawg dhau, piv txwv li, thaum nws nyob ze rau qhov qis qis ntawm qhov kev txhaj tshuaj melting kub, nws tsis tsim nyog los daws qhov teeb meem shrinkage, thiab ntau dua. loj.Lub thicker daim, qhov pom tseeb nws yog.
Qhov laj thawj zoo ib yam li cov pwm kub tau qis dhau.Cov kua nplaum molten condenses sai heev, thiab qhov kub thiab txias sib txawv uas zoo rau kev pub mis tsis tuaj yeem tsim los ntawm txoj haujlwm shrinking thiab lub nozzle.Txoj kev noj zaub mov ntawm txoj haujlwm shrinking yuav raug thaiv ntxov ntxov, thiab qhov teeb meem raug daws.ua nyuaj.Nws tseem tuaj yeem pom tias qhov nrawm nrawm ntawm cov kua nplaum yaj, qhov tsis zoo rau kev daws cov teeb meem shrinkage.Cov khoom siv PC yog cov khoom siv raw uas condenses sai heev, yog li nws qhov teeb meem shrinkage kab noj hniav tuaj yeem hais tau tias yog ib qho teeb meem loj hauv kev txhaj tshuaj molding.
Tsis tas li ntawd, qhov kub ntawm melting tsawg dhau los kuj tsis yog qhov tsim nyog rau kev nce tus nqi ntawm tag nrho cov shrinkage, uas ua rau muaj kev nce ntxiv ntawm cov concentrated shrinkage, yog li aggravating qhov teeb meem shrinkage.
Yog li ntawd, thaum kho lub tshuab los daws qhov nyuaj shrinkage teeb meem, nws tseem ceeb heev uas yuav tsum tau xyuas seb lub melt kub yog hloov qis heev.
Nws yog intuitive dua los saib qhov kub thiab fluidity ntawm cov yaj.
3. Kev txhaj tshuaj nrawm heev tsis yog qhov tsim nyog rau kev daws qhov teeb meem ntawm qhov shrinkage loj
Txhawm rau daws qhov teeb meem shrinkage, thawj qhov uas los rau hauv lub siab yog txhawm rau txhawm rau txhawm rau txhawm rau txhawm rau txhawm rau txhawm rau txhawm rau txhawm rau txhawm rau txhawm rau txhawm rau txhawm rau txhawm rau txhawm rau txhawm rau txhawm rau txhawm rau txhawm rau txhawm rau txhawm rau txhawm rau txhawm rau txhawm rau txhawm rau txhawm rau txhawm rau txhawm rau txhawm rau txhawm rau txhawm rau txhawm rau txhawm rau txhawm rau txhawm rau txhawm rau txhawm rau txhawm rau txhawm rau txhawm rau txhawm rau txhawm rau txhawm rau txhawm rau txhawm rau txhawm rau txhawm rau txhawm rau txhawm rau txhawm rau txhawm rau txhawm rau txhawm rau txhawm rau txhawm rau txhawm rau txhawm rau txhawm rau txhawm rau txhawm rau txhawm rau txhawm rau txhawm rau txhawm rau txhawm rau txhawm rau txhawm rau txhawm rau txhawm rau txhawm rau txhawm rau txhawm rau txhawm rau txhawm rau txhawm rau txhawm rau txhawm rau txhawm rau txhawm rau txhawm rau txhawm rau txhawm rau txhawm rau txhawm rau txhawm rau txhawm rau txhawm rau txhawm rau txhawm rau txhawm rau txhawm rau txhawm rau txhawm rau txhawm rau txhawm rau txhawm rau txhawm rau txhawm rau txhawm rau txhawm rau txhawm rau txhawm rau txhawm rau txhawm rau txhawm rau txhawm rau txhuam, nws yuav tsum tau muab tshem tawm, nws yog qhov yuav tsum tau ua tib zoo txiav txim siab txog kev daws teeb meem shrinkage, nws yog ib qho tsim nyog yuav tau daws cov teeb meem shrinkage.Tab sis yog tias qhov kev txhaj tshuaj tau raug kho sai heev, nws tsis yog qhov tsim nyog los daws qhov teeb meem ntawm qhov shrinkage.Yog li ntawd, thaum lub shrinkage yog nyuaj rau tshem tawm, nws yuav tsum tau daws los ntawm kev txo cov kev txhaj tshuaj ceev.
Txo qhov kev txhaj tshuaj nrawm tuaj yeem ua rau qhov sib txawv ntawm qhov kub thiab txias ntawm cov kua nplaum molten taug kev nyob rau hauv pem hauv ntej thiab cov dej nkag, uas yog qhov tsim nyog rau kev sib xyaw ua ke thiab kev pub mis ntawm cov kua nplaum molten los ntawm deb mus rau ze, thiab nws kuj yog qhov tsim nyog rau txoj hauj lwm shrinkage nyob deb. los ntawm lub nozzle.Tau txais cov tshuaj tiv thaiv kev ntxhov siab ntau dua tuaj yeem mus ntev rau kev daws teeb meem.
Vim tias qhov txo qis ntawm kev txhaj tshuaj nrawm, qhov kub ntawm cov kua nplaum nplaum nyob rau hauv pem hauv ntej yog qis dua, thiab qhov ceev tau qeeb, thiab qhov kev txhaj tshuaj molding tsis yooj yim los tsim kom muaj qhov ntse ntse, thiab kev txhaj tshuaj siab thiab lub sijhawm tuaj yeem ua tau. tsa thiab ntev, uas yog ntau conducive rau daws qhov teeb meem ntawm loj shrinkage.
Tsis tas li ntawd, yog tias qhov kawg-theem kawg-filling nrog qeeb qeeb, siab dua thiab lub sij hawm ntev thiab lub siab-tuav txoj kev maj mam qeeb thiab pressurizing yog saws, cov nyhuv yuav pom tseeb dua.Yog li ntawd, nws kuj yog ib txoj kev zoo los siv txoj kev no los ntawm cov theem tom qab ntawm kev txhaj tshuaj thaum nws tsis tuaj yeem siv qhov kev txhaj tshuaj qeeb qeeb thaum pib.
Txawm li cas los xij, nws tsim nyog nco ntsoov tias qhov txhaws qeeb dhau, tab sis nws tsis tsim nyog los daws qhov teeb meem ntawm qhov shrinkage.Vim tias thaum cov kab noj hniav puv lawm, cov yaj yog khov tag, ib yam li qhov kub ntawm cov yaj yog qis dhau, tsis muaj peev xwm pub cov shrinkage nyob deb.
Post lub sij hawm: Oct-26-2022