Lub tshuab sib tov roj hmab feem ntau muaj peb txoj hauv kev hauv cov txheej txheem sib tov roj hmab: Yob qhwv, Noj hmoov, Kho kom zoo thiab kho kom zoo.
1. Yob qhwv
Thaum lub sijhawm sib tov, tej zaum yuav muaj plaub qhov xwm txheej uas cov roj hmab nyoos tshwm sim ntawm lub log ntawm lub tshuab qhib.
Qhov xwm txheej thawj zaug tshwm sim thaum qhov kub ntawm lub roller qis dhau lossis cov roj hmab tawv, ua rau cov roj hmab nyob ntawm cov roj hmab uas tau sib sau ua ke thiab swb, tsis tuaj yeem nkag mus rau hauv qhov sib txawv ntawm lub roller, lossis tsuas yog ua tej daim me me thaum raug yuam kom nias rau hauv.
Qhov xwm txheej thib ob tshwm sim thaum cov roj hmab nyob rau hauv lub xeev siab elastic, nrog rau ob qho tib si yas ntws thiab tsim nyog siab elastic deformation. Cov khoom siv roj hmab tsuas yog qhwv ib ncig ntawm lub menyuam pem hauv ntej tom qab dhau los ntawm qhov chaw sib nrug ntawm lub menyuam, uas yog qhov zoo rau kev sib tov ua haujlwm thiab kev sib xyaw ntawm cov neeg sawv cev hauv cov khoom siv roj hmab.
Qhov xwm txheej thib peb tshwm sim thaum qhov kub siab dhau, cov roj hmab fluidity nce ntxiv, cov zog intermolecular txo qis, thiab elasticity thiab lub zog txo qis. Lub sijhawm no, zaj duab xis tsis tuaj yeem qhwv ib ncig ntawm lub roller thiab tsim ib lub hnab zoo li, ua rau lub roller tawg lossis tawg, thiab tsis tuaj yeem sib xyaw.
Qhov xwm txheej thib plaub tshwm sim thaum muaj qhov kub siab dua, qhov twg cov roj hmab hloov pauv ntawm lub xeev elastic heev mus rau lub xeev viscous, yuav luag tsis muaj elasticity thiab lub zog, ua rau nws nyuaj rau txiav cov khoom siv roj hmab. Yog li, qhov kub ntawm qhov sib tov yuav tsum tau tswj kom cov khoom siv roj hmab nyob rau hauv qhov zoo, uas yog qhov zoo rau cov txheej txheem sib tov.
2. Noj hmoov
Cov theem noj hmoov yog hais txog cov txheej txheem ntawm kev sib tov cov tshuaj sib xyaw rau hauv cov khoom siv nplaum. Tom qab lub menyuam roj hmab raug qhwv, txhawm rau kom sib tov cov tshuaj sib xyaw rau hauv cov roj hmab sai sai, ib qho kua nplaum uas tau khaws cia yuav tsum khaws cia rau ntawm qhov kawg ntawm qhov sib txawv ntawm lub menyuam.
Thaum ntxiv cov tshuaj sib xyaw, vim yog qhov txuas ntxiv tig thiab hloov pauv ntawm cov kua nplaum uas tau sau los, cov tshuaj sib xyaw raug nqa mus rau hauv cov wrinkles thiab grooves ntawm cov kua nplaum uas tau sau los, thiab tom qab ntawd mus rau hauv qhov sib txawv ntawm cov menyuam.
Thaum lub sijhawm noj cov noodles, cov kua nplaum yuav tsum muaj qhov nruab nrab. Thaum tsis muaj kua nplaum lossis cov kua nplaum me dhau, ntawm ib sab tes, tus neeg sawv cev sib xyaw tsuas yog siv lub zog txav ntawm lub menyuam tom qab thiab roj hmab los txhuam rau hauv cov roj hmab, thiab tsis tuaj yeem nkag mus tob rau hauv cov roj hmab, uas cuam tshuam rau qhov cuam tshuam ntawm kev sib kis; Ntawm qhov tod tes, cov hmoov ntxiv uas tsis tau txhuam rau hauv roj hmab yuav raug nias ua tej daim los ntawm lub menyuam tom qab thiab poob rau hauv lub tais txais. Yog tias nws yog cov kua ntxiv, nws yuav lo rau lub menyuam tom qab lossis poob rau ntawm lub tais txais, ua rau nyuaj rau sib tov.
Yog tias muaj cov kua nplaum ntau dhau, qee cov kua nplaum yuav tig thiab dov rau ntawm qhov kawg ntawm qhov sib txawv ntawm cov menyuam, lub tshuab sib tsoo roj hmab, tiv thaiv nws kom tsis txhob nkag mus rau hauv qhov sib txawv thiab ua rau nws nyuaj rau cov neeg sib tov sib xyaw. Qhov ntau ntawm cov kua nplaum uas tau sib sau ua ke feem ntau ntsuas los ntawm lub kaum sab xis (lossis lub kaum sab xis tom), uas feem ntau yog ntawm 32-45.
3. Kev txhim kho thiab kev txhim kho
Kauj ruam thib peb ntawm kev sib tov yog kev ua kom zoo. Vim yog qhov viscosity siab ntawm roj hmab, thaum sib tov, cov khoom siv roj hmab tsuas yog ntws hauv qhov kev taw qhia ncig raws li qhov kev taw qhia tig ntawm lub tshuab qhib zeb, tsis muaj axial ntws. Ntxiv mus, cov roj hmab ntws hauv qhov kev taw qhia ncig yog laminar. Yog li ntawd, lub tshuab sib tov sab hauv, cov txheej nplaum uas lo rau ntawm qhov chaw ntawm lub tshuab pem hauv ntej ntawm kwv yees li 1/3 ntawm cov zaj duab xis tuab tsis tuaj yeem ntws thiab dhau los ua "txheej tuag" lossis "txheej tsis ruaj khov" lub tshuab sib tov hauv chav kuaj.
Tsis tas li ntawd xwb, cov kua nplaum uas sib sau ua ke rau sab saud ntawm qhov sib txawv ntawm cov menyuam kuj tseem yuav tsim ib feem ntawm "qhov chaw rov qab los". Cov laj thawj saum toj no ua rau cov neeg sawv cev sib xyaw tsis sib xws hauv cov khoom siv roj hmab.
Yog li ntawd, nws yog ib qho tsim nyog yuav tsum tau mus dhau ntau qhov kev ua kom zoo, txiav nrog riam sab laug thiab sab xis, tshuab roj hmab extrusion, dov lossis daim duab peb ceg qhwv, thinning, thiab lwm yam, txhawm rau rhuav tshem cov txheej tuag thiab thaj chaw reflux, ua kom sib xyaw ua ke, thiab xyuas kom meej qhov zoo thiab sib xws.
Lub sijhawm tshaj tawm: Lub Kaum Hli-30-2024
