Dab tsi yog cov txheej txheem tseem ceeb ntawm extruded pub pellet zeb?

Nov 24, 2025

Tso lus

Thaum cov ntses pub extruders muaj ntau yam khoom, tsuas yog plaub qhov tiag tiag txiav txim siab noj zaub mov zoo: lub tshuab extrusion, ntsia hlau, tuag, thiab txias. Cov plaub yam no ua haujlwm ua ke los ua kom tiav cov txheej txheem txias, extrusion, thiab shaping txheej txheem ntawm cov khoom siv raw. Lawv cov qauv tsim, kev xaiv cov khoom siv, thiab qhov ntsuas qhov ntsuas ncaj qha cuam tshuam rau cov ntsuas tseem ceeb xws li qib ntawm extrusion, ua npuas dej tsis kam, thiab cov khoom noj khaws cia ntawm cov khoom noj.

Lub extrusion chamber yog "qhov chaw tseem ceeb rau cov khoom siv raw hloov dua siab tshiab," thiab nws cov qauv tsim ncaj qha txiav txim siab cov nyhuv extrusion. Lub siab - zoo extrusion chamber txais yuav ib tug cais peb -section tsim: ib tug pub seem, ib tug compression seem, thiab ib tug paug seem, txhua tus nrog sib txawv diameters thiab kub tswj. Cov ntu pub mis muaj qhov loj sab hauv (feem ntau yog 150-200mm), feem ntau ua haujlwm kom tau txais thiab ua kom sov cov ntaub ntawv raw, tswj qhov kub ntawm 70-80℃. Cov seem compression maj mam txo qis hauv txoj kab uas hla, tsim kom muaj lub siab gradient uas compresses cov ntaub ntawv raw thiab nce qhov kub ntawm 100-120 degree, pib starch gelatinization. Cov seem tso tawm muaj qhov tsawg tshaj plaws sab hauv txoj kab uas hla, qhov twg lub siab ncav cuag nws lub ncov (5-10MPa), thiab qhov kub thiab txias nce mus rau 120-140 degree, qhov twg cov ntaub ntawv raw tau ua tiav expansion. Sab hauv phab ntsa ntawm lub expansion chamber feem ntau yog lined nrog hnav-resistant alloy bushings nrog kauv grooves ntawm bushing nto. Qhov no txhim kho kev sib txhuam ntawm cov khoom siv raw thiab cov phab ntsa chamber, txhim kho cov nyhuv nthuav dav, thaum tseem txo qis hnav thiab txuas ntxiv kev pab cuam lub neej. Rau kev tsim khoom noj hauv dej, kev sib khi ntawm qhov nthuav dav chamber yog qhov tseem ceeb tshwj xeeb. Cov cuab yeej zoo siv lub labyrinth foob qauv los tiv thaiv cov khoom siv raw thiab kev poob siab, ua kom cov pellet ua npuas dej tsis kam.

Cov ntsia hlau ntawm cov khoom noj tsiaj extruder yog qhov tseem ceeb rau kev xa hluav taws xob thiab cov khoom siv raw extrusion; nws cov qauv tsis ncaj qha cuam tshuam rau qib ntawm kev nthuav dav thiab pellet ntom. Cov ntsiab lus tseem ceeb muaj xws li lub suab, lub taub hau taub hau qhov siab, thiab qhov ntev - mus rau - txoj kab uas hla, nrog rau qhov sib txawv ntawm qhov sib txawv raws li qhov yuav tsum tau noj. Thaum tsim khoom siab - nthuav dav cov khoom noj tsiaj, xaiv cov ntsia hlau nrog lub suab loj thiab cov ntsia hlau qis qis, nrog rau qhov sib piv tswj ntawm 12: 1. Qhov no nce lub sijhawm nyob ntawm cov khoom siv raw hauv cov khoom siv extrusion, txhim kho cov nyhuv extrusion. Thaum tsim khoom qis- nthuav dav dej pub, xaiv cov ntsia hlau nrog lub suab me me thiab cov ntsia hlau siab siab, nrog rau qhov sib piv ntawm 10: 1. Qhov no ua rau lub sijhawm nyob hauv lub sijhawm luv luv thiab ua kom lub zog thiab ua npuas dej{11}}cov pellets tiv taus. Cov khoom siv ntsia hlau feem ntau yog 38CrMoAl alloy steel, uas, tom qab kev kho nitriding, ua tiav qhov hardness ntawm HRC60 lossis siab dua, muaj peev xwm tiv taus kev puas tsuaj ntawm siab{15}}cov ntaub ntawv nyoos xws li nqaij ntses thiab nqaij. Qee cov khoom siv siab- kawg siv cov qauv tsim qauv, tso cai rau kev hloov cov tes tsho nrog cov pitches sib txawv raws li cov yam ntxwv ntawm cov khoom siv raw, txhim kho cov khoom siv ntau yam.

Lub taub hau tuag yog "theem kawg ntawm kev tsim pellet," thiab nws cov qauv txiav txim siab cov duab, qhov loj, thiab kev ruaj ntseg ntawm cov pellets. Cov ntsiab lus tseem ceeb ntawm lub taub hau tuag yog qhov tuag qhov, thiab txoj kab uas hla, qhov ntev, thiab kev teeb tsa ntawm lub qhov tuag yuav tsum tau tsim raws li hom pub. Lub qhov tuag rau cov dej pub dej feem ntau yog ncig, nrog txoj kab uas hla ntawm 1.0-3.0 mm thiab ntev - rau- txoj kab uas hla ntawm 5: 1, kom ntseeg tau tias cov pellets compact. Cov khoom noj tsiaj tuag qhov tuaj yeem tsim tau raws li lub voj voog, square, lossis pob txha- zoo li tus, nrog txoj kab uas hla ntawm 2.0-5.0 hli thiab qhov ntev - mus rau qhov sib piv ntawm 3: 1, txhim kho pellet palatability. Lub taub hau tuag yog ua los ntawm high-speed steel los yog hard alloy, thiab sab hauv phab ntsa ntawm cov channel yog polished (roughness Ra tsawg dua los yog sib npaug rau 0.8μm) kom txo tau kev sib txhuam ntawm cov khoom siv raw thiab cov channel, tiv thaiv burrs los ntawm kev tsim cov pellets. Lub taub hau tuag kuj tau nruab nrog lub ntsuas kub tswj, uas siv hluav taws xob cua sov los tswj lub taub hau tuag ntawm 100-120 degree, tiv thaiv cov khoom siv cua txias thiab ua kom muaj zog hauv cov channel, yog li tiv thaiv kev thaiv.

Lub tshuab txias ntawm lub tshuab pellet khoom noj dev yog qhov tseem ceeb rau kev khaws cov khoom noj; nws cov qauv tsim ncaj qha cuam tshuam rau kev ua haujlwm txias thiab qib ntawm cov as-ham poob. Lub siab- txias txias zoo siv dual- ncej paddle tsim, nrog ob lub shafts rotating nyob rau hauv opposite lus qhia thiab paddles teem nyob rau hauv ib tug alternating qauv, xyuas kom meej sib tov ntawm raw khoom thiab chav. Lub tshuab txias yog feem ntau 1.2-1.8m ntev, nrog lub paddle ceev ntawm 30-60 rpm. Qhov ceev tuaj yeem hloov kho raws li cov yam ntxwv ntawm cov khoom siv raw kom ua tiav cov txiaj ntsig zoo tshaj plaws. Txhawm rau tiv thaiv tshav kub- cov khoom noj muaj txiaj ntsig zoo, lub tshuab txias siv qis- siab chav (0.2-0.3MPa) rau cua sov, tswj qhov kub ntawm 85-95℃. Nws tseem tau nruab nrog lub ntsuas dej noo los saib xyuas cov dej noo ntawm cov ntaub ntawv raw hauv lub sijhawm, tiv thaiv cov dej noo ntau dhau los ua rau cov pellets ua mos. Rau cov khoom noj nrog ntxiv probiotics thiab lwm cov khoom xyaw nquag, qee cov khoom siv kuj tseem muaj cov khoom siv tom qab txias rau cov cua kub qis tom qab extrusion, kom ntseeg tau tias cov khoom xyaw nquag tsis raug puas tsuaj.