Ntau yam cuam tshuam rau kev txhaj tshuaj molding.

Thaum tsim cov pwm txhaj tshuaj, feem ntau muaj ntau yam uas cuam tshuam rau qhov zoo ntawm cov khoom.

Yuav kom suav tau, muaj plaub lub ntsiab lus tseem ceeb:

1. Pwm kub

Cov pwm kub qis dua, qhov kub poob sai dua vim yog thermal conduction, qhov kub ntawm cov yaj yuav qis dua, thiab qhov fluidity tsis zoo.Qhov tshwm sim no tshwj xeeb yog tshwm sim thaum siv cov tshuaj txo qis.

2. Cov ntaub ntawv yas

Qhov nyuaj ntawm cov khoom siv yas txiav txim siab qhov nyuaj ntawm kev txhaj tshuaj molding txheej txheem.Kev ua tau zoo ntawm cov ntaub ntawv yas sib txawv heev vim muaj ntau yam sib txawv, hom sib txawv, cov tuam txhab sib txawv, thiab cov khoom sib txawv.Cov kev ua haujlwm sib txawv tuaj yeem ua rau muaj qhov sib txawv ntawm molding.

3. Kev txhaj tshuaj kub

Cov yaj ntws mus rau hauv qhov txias pwm kab noj hniav thiab poob cua sov vim thermal conduction.Nyob rau tib lub sijhawm, cua sov yog tsim los ntawm shearing.Cov cua sov no yuav ntau dua lossis tsawg dua qhov kub poob los ntawm thermal conduction, feem ntau nyob ntawm qhov kev txhaj tshuaj molding.Lub viscosity ntawm cov yaj yuav qis dua thaum kub nce.Nyob rau hauv txoj kev no, qhov siab dua qhov kev txhaj tshuaj kub, qhov qis dua qhov viscosity ntawm cov yaj, thiab qhov me dua qhov yuav tsum tau ntim siab.Nyob rau tib lub sijhawm, kev txhaj tshuaj kub kuj tseem txwv los ntawm thermal degradation kub thiab decomposition kub.

4. Lub sijhawm txhaj tshuaj

Qhov cuam tshuam ntawm lub sijhawm txhaj tshuaj ntawm cov txheej txheem txhaj tshuaj molding yog xav txog peb yam:

(1) Yog tias lub sij hawm txhaj tshuaj luv luv, lub shear strain tus nqi hauv cov yaj yuav nce ntxiv, thiab qhov kev txhaj tshuaj yuav tsum tau ua kom tiav cov kab noj hniav kuj yuav nce ntxiv.

(2) Txo lub sij hawm txhaj tshuaj thiab ua kom cov shear strain nyob rau hauv lub yaj.Vim lub shear thinning yam ntxwv ntawm cov yas yaj, lub viscosity ntawm cov yaj yuav txo, thiab cov kev txhaj tshuaj siab yuav tsum tau sau cov kab noj hniav yuav tsum tau txo.

(3) Txo lub sij hawm txhaj tshuaj, shear strain tus nqi nyob rau hauv lub yaj nce, qhov ntau dua shear tshav kub, thiab nyob rau tib lub sij hawm tsawg tshav kub yog poob vim tshav kub conduction.Yog li ntawd, qhov kub ntawm cov yaj yog siab dua thiab viscosity qis dua.Kev txhaj tshuaj yuav tsum tau ua kom puv kab noj hniav yog Kev Nyuaj Siab yuav tsum tau txo.Kev sib xyaw ua ke ntawm peb cov xwm txheej saum toj no ua rau qhov nkhaus ntawm qhov kev txhaj tshuaj siab yuav tsum tau ua kom tiav cov kab noj hniav tshwm "U" zoo li tus.Ntawd yog, muaj lub sijhawm txhaj tshuaj thaum qhov yuav tsum tau txhaj tshuaj tsawg tsawg.