Thaum cov yaj tau txhaj rau hauv cov kab noj hniav nrog cov loj ntim ntawm kev kub ceev thiab kev kub siab, cov lus kub siab, qhov ua kom yooj yim tshwm sim. Nyob rau lub sijhawm no, lub ntsej muag melt tshwm sim transverse pob txha lov, thiab lub pob txha lov yog ntxhib suav nrog cov khoom yas rau daim ntawv muab tshuaj txhuam. Tshwj xeeb tshaj yog thaum muaj cov khoom me me ntawm cov khoom siv molten ncaj qha rau cov kab noj hniav uas yooj yim dhau, thiab cov kab muab tshuaj txhuam uas loj dua.
Lub ntsiab lus ntawm yaj npau taws yog tshwm sim los ntawm kev coj tus cwj pwm tshiab ntawm polymer molten cov khoom. Thaum molten cov khoom ntws tawm hauv lub tog raj kheej, cov ntaub ntawv molten nyob ze ntawm lub tog raj kheej yog qhov ua rau muaj kev sib raug zoo thiab cov khoom siv me me ntawm cov khoom siv me me. Ib zaug molten cov khoom tau txhaj tawm ntawm lub nozzle, lub zog tsis zoo ntawm lub raj yas uas muaj cov khoom siv ntawm lub tog raj kheej nyob hauv phab ntsa yog nqa thiab nrawm los ntawm Cov khoom siv molten nyob hauv nruab nrab. Vim tias cov khoom ntws ntawm cov khoom siv molten yog cov khoom siv txuas ntxiv, cov dej ntws tawm ntawm cov khoom molten sab hauv thiab sab nraud yuav raug muab rov qab mus rau qhov nruab nrab.
Hauv txoj kev no, cov yaj yuav muaj kev ntxhov siab ntse yuav tsim kev ntxhov siab, vim kev ntxhov siab ntau, muaj ntau dua qhov melt muaj peev xwm ntawm kev sib tsoo.
Yog hais tias cov khoom siv molten tau ntsib kev hloov pauv sai sai, xws li cov khoom muaj sia nyob sab hnub kaum, thiab cov khoom sib txawv thiab cov khoom sib txawv los ntawm cov khoom siv tsis sib xws, thiab shear deformation yog loj. Thaum nws sib xyaw ua ke rau cov khoom siv ntws tawm ib txwm, cov deformation rov qab ntawm ob yog tsis sib xws, thiab nws tsis tuaj yeem raug kaw. Nws qhov ua tau tseem muaj kev sib tsoo.
Los ntawm cov saum toj no, nws tuaj yeem pom tias kom kov yeej tus ntsia melt rupture thiab tsis txhob muab tshuaj txhuam me ntsis:
Qhov thib ib yog kom them sai sai rau tshem tawm txoj kev tuag lub kaum sab xis nyob hauv Flow channel, yog li ntawd cov Flow channel li ua tau;
Qhov thib ob yog kom nce cov khoom kub, txo lub sijhawm so ntawm cov khoom siv so, kom nws deformation yooj yim kom rov zoo thiab kaw;
Qhov thib peb yog kom ntxiv cov roj qis qis rau cov khoom siv raw, vim hais tias qhov qis dua cov khoom siv molecular ntawm cov khoom siv molecular ntawm cov khoom siv hluav taws xob molecular, cov dav ntiav ua rau txo qis cov nyhuv elastic;
Plaub yog kom tswj tau kev txhaj tshuaj ceev thiab ntsia hlau ceev;
Qhov thib tsib, nws yog ib qho tseem ceeb heev uas yuav tau teeb tsa lub rooj vag txoj kev tsim nyog thiab xaiv lub Guard daim ntawv ncaj ncees. Kev xyaum pom tau hais tias lub rooj vag zais (lub rooj vag zais) yog qhov zoo tshaj thaum lub rooj vag loj heev yog siv. Nws yog qhov zoo tshaj plaws los xaiv qhov chaw ntawm lub rooj vag kom txhaj cov khoom siv molten ua ntej nkag mus rau qhov chaw txaus, tsis txhob ua rau cov khoom ntws ncaj qha mus rau hauv qhov loj dua.