Particle hardness yog ib qho ntawm cov ntsuas zoo uas txhua lub tuam txhab pub khoom noj tau zoo heev rau. Nyob rau hauv cov tsiaj nyeg thiab nqaij qaib pub, siab tawv yuav ua rau tsis zoo palatability, txo cov khoom noj, thiab tseem ua rau lub qhov ncauj rwj hauv cov npua suckling. Txawm li cas los xij, yog tias qhov hardness tsawg, cov hmoov cov ntsiab lus yuav txo. Nce, tshwj xeeb tshaj yog qhov tsawg hardness ntawm cov ntaub ntawv pellet tseem yuav ua rau cov khoom tsis zoo xws li kev faib zaub mov. Yog li ntawd, cov tuam txhab yuav tsum xyuas kom meej tias cov khoom noj hardness ua tau raws li cov qauv zoo. Ntxiv nrog rau kev kho cov mis pub mis, lawv kuj tseem tsom mus rau ntau theem ntawm kev tsim khoom thiab kev ua haujlwm, uas tseem yuav muaj kev cuam tshuam tseem ceeb rau qhov hardness ntawm pellet pub.
1) Qhov tseem ceeb uas ua lub luag haujlwm txiav txim siab hauv qhov nyuaj ntawm cov khoom hauv kev sib tsoo yog qhov sib tsoo qhov loj ntawm cov khoom siv raw. Feem ntau hais lus, qhov zoo dua qhov sib tsoo particle loj ntawm cov ntaub ntawv raw, qhov yooj yim dua rau cov hmoov txhuv nplej siab rau gelatinize thaum lub sij hawm txias, thiab qhov muaj zog ntawm kev sib raug zoo hauv cov pellets. Qhov yooj yim dua tawg, qhov ntau dua qhov hardness. Yog li ntawd, nyob rau hauv qhov tseeb ntau lawm, lub crushing particle loj yuav tsum tau kho kom tsim nyog raws li kev ua tau zoo ntawm cov tsiaj sib txawv thiab qhov loj ntawm lub nplhaib tuag aperture.
2) Los ntawm puffing kev kho mob ntawm raw cov ntaub ntawv, co toxins nyob rau hauv cov ntaub ntawv raw tuaj yeem raug tshem tawm, cov kab mob tuaj yeem raug tua, cov khoom tsis zoo tuaj yeem raug tshem tawm, cov proteins hauv cov khoom siv raw tuaj yeem raug denatured, thiab cov hmoov txhuv nplej siab tuaj yeem ua tiav gelatinized. Tam sim no, puffed raw cov ntaub ntawv yog tsuas yog siv nyob rau hauv zus tau tej cov high-qib suckling npua pub thiab tshwj xeeb cov khoom noj khoom haus dej. Rau cov khoom siv dej tshwj xeeb, tom qab cov khoom siv raw yog puffed, qib ntawm cov hmoov txhuv nplej siab gelatinization nce thiab cov tawv nqaij ntawm cov khoom tsim kuj nce, uas yog qhov zoo rau kev txhim kho kev ruaj ntseg ntawm cov khoom hauv dej. Rau kev pub npua noj, cov khoom yuav tsum yog crispy thiab tsis tawv heev, uas yog qhov zoo rau kev noj cov npua suckling. Txawm li cas los xij, vim tias qib siab ntawm cov hmoov txhuv nplej siab gelatinization hauv puffed suckling npua pellets, lub hardness ntawm pub pellets kuj tseem loj.
3) Kev sib xyaw ntawm cov khoom siv raw tuaj yeem txhim kho qhov sib xws ntawm ntau yam khoom me me, uas muaj txiaj ntsig zoo rau kev ua kom cov particle hardness pib zoo ib yam thiab txhim kho cov khoom zoo. Hauv kev tsim cov khoom noj pellet nyuaj, ntxiv 1% mus rau 2% noo noo nyob rau hauv lub tov khoom yuav pab txhim kho kev ruaj ntseg thiab hardness ntawm pellet pub. Txawm li cas los xij, nws tseem yuav tsum tau xav txog qhov tsis zoo ntawm qhov nce ntawm cov dej noo ntawm qhov ziab thiab txias ntawm cov pellets. Nws kuj tsis haum rau kev khaws cov khoom. Hauv kev tsim cov pellet ntub dej, tuaj yeem ntxiv rau 20% mus rau 30% noo noo. Nws yog ib qho yooj yim los ntxiv txog 10% noo noo thaum lub sij hawm sib tov dua thaum lub sij hawm txias txheej txheem. Cov pellets tsim los ntawm cov ntaub ntawv uas muaj dej noo muaj tsawg hardness, softness thiab zoo palatability. Cov lag luam loj loj tuaj yeem siv cov khoom ntub dej no. Cov pellets ntub dej feem ntau tsis yooj yim rau khaws thiab feem ntau yuav tsum tau noj tam sim tom qab tsim khoom. Ntxiv cov roj thaum lub sij hawm sib tov yog ib qho kev siv roj ntxiv hauv cov kev cob qhia pub khoom noj. Ntxiv 1% mus rau 2% ntawm cov roj muaj qhov cuam tshuam me ntsis ntawm kev txo cov tawv ntawm cov khoom, thaum ntxiv 3% mus rau 4% ntawm cov roj tuaj yeem txo qhov hardness ntawm cov khoom.
4) Chav txias yog cov txheej txheem tseem ceeb hauv kev ua zaub mov pellet, thiab cov nyhuv txias ncaj qha cuam tshuam rau cov qauv sab hauv thiab cov tsos zoo ntawm cov pellets. Chav zoo thiab lub sij hawm txias yog ob yam tseem ceeb uas cuam tshuam rau qhov txias txias. Cov khoom zoo qhuav thiab saturated chav muaj peev xwm muab cua sov ntau ntxiv kom qhov kub thiab txias ntawm cov khoom thiab gelatinize cov hmoov txhuv nplej siab. Lub sijhawm txias dua, qhov siab dua ntawm cov hmoov txhuv nplej siab gelatinization. Qhov siab dua tus nqi, qhov denser particle qauv tom qab tsim, qhov zoo dua qhov ruaj khov, thiab ntau dua qhov hardness. Rau cov ntses pub, ob-txheej los yog ntau-txheej tsho feem ntau yog siv rau kev txias kom txias txias thiab txuas ntxiv lub sijhawm txias. Nws yog qhov tsim nyog rau kev txhim kho kev ruaj ntseg ntawm cov ntses noj cov khoom hauv dej, thiab cov tawv tawv ntawm cov khoom kuj nce ntxiv.
5) Thaum lub sij hawm granulation txheej txheem, kev tsis xws li lub aperture thiab compression piv ntawm lub nplhaib tuag kuj yuav cuam tshuam qhov hardness ntawm cov khoom. Lub hardness ntawm cov khoom tsim los ntawm lub nplhaib pwm nrog tib lub aperture tab sis sib txawv compression ratios yuav nce ho nrog qhov nce ntawm compression piv. . Xaiv lub nplhaib tuag nrog qhov tsim nyog compression piv tuaj yeem tsim cov khoom nrog qhov tsim nyog hardness. Nyob rau tib lub sijhawm, qhov ntev ntawm cov khoom kuj tseem muaj feem cuam tshuam rau lub siab-kev muaj peev xwm ntawm cov khoom. Rau cov khoom ntawm tib txoj kab uas hla, yog tias cov khoom tsis muaj qhov tsis xws luag, qhov ntev ntawm qhov ntev, qhov hnyav dua qhov ntsuas. Yog li ntawd, kho txoj hauj lwm ntawm lub cutter kom muaj qhov tsim nyog particle ntev tuaj yeem ua kom lub hardness ntawm cov khoom sib xws. Lub particle inch thiab cross-sectional shape kuj muaj qee yam cuam tshuam rau particle hardness. Tsis tas li ntawd, cov khoom ntawm lub nplhaib tuag kuj muaj qee yam cuam tshuam rau cov tsos zoo thiab hardness ntawm cov pellets. Muaj qhov sib txawv ntawm qhov sib txawv ntawm cov pellet pub ua los ntawm cov hlau zoo tib yam lub nplhaib tuag thiab stainless hlau nplhaib tuag.
Txhawm rau txuas ntxiv lub sijhawm cia ntawm cov khoom noj khoom haus thiab ua kom cov khoom zoo nyob rau hauv ib lub sijhawm, qhov tsim nyog kom qhuav thiab ua kom txias ntawm cov khoom noj yog yuav tsum tau.
