Paub Txog Cov Teeb Meem Feem Ntau Nyob Rau Hauv Kev Tshuab Tawv Rau Qhov Chaw Poob Tiam

Cov Zej Zwg Feem Ntau ntawm Cov Teeb Meem Siv Kho Tawv Rau Hauv Kho Tawv Muaj Ib Lub Ceev

Thaum cov khoom siv rau kev pauv thiab tshem tsis hla tawm tau yooj yooj, cov neeg tswj xwm feem ntau pom tias muaj qhov tsis yog. Tus nuj nqah tuaj yeem hla tawm tsis zoo, thiab tus nuj nqah kuj loj meem. Saib nyob hauv qhov rooj kuab, lawv pom tias cov kab ntsug ntse no tsis hla tawm los ntawm qhov tsis muaj ntau yam khoom hla tawm. Thaum twg muaj qhov chaw ntawm qhov chaw tso khoom tsis ntau, ces muaj qhov tshwm sim uas tsim kho tawm. Yav tom ntej, muaj qhov tshwm sim uas tsim kho tawm ntawm qhov chaw tso khoom tawm - nws txhais tau tias muaj dej nkhaus tau nyob hauv qhov chaw tso khoom. Txhua qhov no feem ntau txhais tau tias kev tsim khoom tsis muaj peev xwm zoo li 12 mus rau 18% hauv kev tsim khoom rau thermal break. Qhov loss no yuav nce ntau tshaj plaws hauv ib cheeb tsam tsim khoom.

Rog ntawm yam khoom siv rau kev tso khoom rau thermal break strip

Daim ntawv no ntawm cov khoom siv polymer muaj feem ntau hauv yam li cas nws tuaj raws nrog kev siv tshuab. Piv txwv li, cov duab kub kub PET recycled ob leeg zoo li yuav tshwm sim dua ib feem rau ob peb zaug dhau tias cov duab meej meej tshiab, thiab qhov no kev xam txheej rheological tau tso cai los ntawm hnub no. Thaum siv cov khoom siv uas muaj kev nyuaj siab zoo li PVC ntim tshaib, kom paub meej tias chaw ntim sab nraud yog tshaj tshuaj txaus, nyob saum 0.45 thiab 0.55 grams ib cubic centimeter yog qhov tseem ceeb heev rau kev nyob siab hauv kev sib xyaw nrog lub screw channel. Ntau tus neeg tsim khoom uas nyob ze kev pheej hmong nyob rau hauv kev pheej hmong tam sim no thiaj xaiv kev tsim kho tawb tawb vim nws pab sov qhov sib tshooj ntawm cov duab ntaus nqi, thaum nws tseem pab cuam tshuaj ntau dua hauv qhov kev sib hlo tshwj xeej. Tab sis, tsis tas li, tsis pub muaj kev txiav txim siab tshwj xeej nyob ntawm qhov kev tsim khoom thiab cov duab ntawm khoom siv.

Kev txiav txim siab ntawm cov dej nyob rau hauv polymer hauv kev sib txawv

Polymer hygroscopic yuav dab tsi hluv nyob rau hauv ib lub sijhawm ntawm rooj tsim, tsim cov av ntxoov uas tsis zoo rau kev tsim. Nylon 6/6 nrog 0.03% hluv muaj qhov sib txawv ntawm viscosity 27% siab dua li thawj chaw tsim ( <0.01%). Qhov tsis zoo no feem ntau xav tau kev kho dua ntawm screw nrog feed zone ntev dua kom pom kev sib txawv tam sim ntawm viscosity thaum kev tsim.

Sau tus ncej uas tsis zoo rau kev pib hauv Single Screw Extruders

Kev siv hnav nyob rau hauv feed throat uas muaj kev txhawb rau kev tsim thermal break strip

Kev siv hnav nyob rau hauv qhov chaw ntxuag khoom feem ntau yog qhov tseem ceeb tab sis feem ntau tsis pom zoo rau kev ploog siab, txhe especially thaum ua haujlwm nrog cov khoom siv plastic uas muaj fiberglass. Thaum kuv tshwm sim, nws tsim tau qhov chaw tsis zoo uas tshimm siab rau kev txhuam khoom thiab txo qhov kev sib txhuam ntawm kev ntxuav. Kev xam txheej uas pub tseg lawt xyoo no qhia tias qhov chaw ntxuag khoom uas muaj zeeg siv hnav yuav cuam tshuam txog kev ntxuag polymer los ntawm li 35% thaum ua haujlwm nrog thermal break. Tsoom tsev feem ntau xav kom nrhiav kev siv laser txhua rau hnub vim nrhiav qhov sib txawv ntawm daim duab uas loj dua half a millimeter. Qhov no yuav tseem tseem ceeb dua thaum ua haujlwm nrog cov khoom siv composite uas muaj minerals.

Qhov tsis txaus ntawm lub screw design rau kev siv zog siab  cov duab ntxuag thermal break uas muaj kev sib txhuam zog

Cov roj teeb uas tsis muaj kev cuam tshwv ntau thaum siv nrog cov khoom siv thick uas muaj ceramic ntau dua 60% yuav tsis ua haujlwm zoo li cas. thaum ratios compression hlo phaus saum 2.5 rau 1, tsis muaj kev cuam tshwv siab tas li ntawm qhov kev siv uas tsis txaus siab thaum melting lossis nyob rau hauv kev balance lubrication. ib tug neeg sawv cev tau los ntawm kev xyaum nug sab laj pom tias kev hloov mus rau barrier screw designs tuaj yeem txo feeding problems los yog 40% kom compared rau single stage setups. thiab yog tias muaj neeg siv silicone based thermal breaks, kev tsim flight depths uas muaj taper ntawm 15 rau 20 millimeters tuaj yeem pab stabilizing solid bed material zoo dua. qhov kev pab hauv no tau pom hauv 28% raws ib tug simulation work los ntawm 2020 uas sau ntxiv txog kev flow ntawm cov khoom no.

Barrel temperature gradients disrupting material conveyance

Thiab chaw tso khoom mus, thaum kub txheej txheem ntau tshaj 15 degrees Celsius per meter, feem ntau tsim tau lub thawj film kub uas tsis zoo rau kev sib pib tso cov khoom ntawm qhov chaw. Ib tug neeg nyob rau xyoo 2004 thiaj pom tias cov kub no muaj feem ntau rau qhov sib txawv ntawm 15% hauv kev sib pib rau cov thermal strips polyamide. Nyob rau hnub no, tseem ceeb tshaj plaws ntawm cov cuab yeej extrusion kho tau tej kub no los ntawm kev siv cov cuab yeej kho kub uas muaj PID. Qhov no pab sau cov kub hauv +/- 2 degrees Celsius, qhov tseem ceeb heev kom tsis txhob muaj kev sib txawv rau cov crystalline structure hauv cov thermal barrier khoom zoo siv rau kev siv hauv kev kho tshuab.

Daim duab ntawm feed zone thiab nws txoj cai rau kev sib pib tso khoom

Ib qhov L/D ratio zoo tshaj 28-30:1thim siab nyav dav los tsis muaj chaw tshwm sim. Lub ntim meej muaj rooj zaum tau nce ntau dua li 40–60% rau cov khoom siv zoo li ntim meej, tsawg kub. Lub screw feed muaj kev hloov pauv tau tuaj yeem nce ntau dua li 25% thaum siv cov duab ntawm regrind pellets, uas txwv qhia tias muaj kev pib tshwm sim nyob rau hauv kev sib tham txog kev tshuam.

Txhim kho kev tshuab thiab kev sib raug zoo rau kev sau ua kej zoo

Kev sib xyaw kom paub meej txog lub duab thiab lub zos

Cov duab tshuab tseem ceeb tuaj yeem tshem tawm kev tshwm sim thiab kev sau yuam:

• Kev faib tso : Tswj xyuas lub kaum ntse ntse ntawm 1–3 mm siv kev sib sau ntau npaug
• Kev sib xws ntawm zos : Sib xyaw cov khoom ntxig nrog cov resin tshwj tsis siv tumble mixer (15–20 RPM ib saib 30 feeb)
• Kev ntxig cov khoom ntxig : Muab cov khoom siv sib ntxig ua ntej kom tsis txhob muaj kev faib tso thaum sau

Siv kev pab ntaub ntawv thiab cov cuab yeej tso rau hauv qhov chaw pab tshuam xyuas nyob rau hauv qhov kho tshiab

Rau cov khoom siv tshuaj txhuam, cov molecular sieves nyob rau hauv qhov chaw nres tshuaj nyob rau hauv hopper pads yuav dab tsi cov dej nyob ze ntawd thaum siv tshuaj, kom txo qhov tsis muaj zog txaus siab.

Txheeb pom qhov caij uas raug xim rau hauv qhov chaw siv tshuaj

Tswj ib qhov gradient 50–60°C ntawm peb qhov chaw thawj hauv barrel kom tsis txhob muaj qhov khib nyiab ua ntej thaum pab tshuam xyuas cov khoom nyob hauv qhov chaw. Daim duab infrared thermography sau tias qhov sib txawv ±5°C los ntawm qhov no tuaj yeem tsim qhov sib txawv ntawm 20% nyob rau hauv qhov siv tshuaj.

Tswj lub speed thiab backpressure ntawm lub screw kom tau cov tshuaj tshuab txaus siab

Txhim kho lub RPM ntawm lub screw (feem ntau yog 30–60) nrog kev tswj hwm pressure PID kom tau ib qhov extrusion txaus siab nyob rau hauv 8–12 feeb. Cov ntaub ntawv los ntawm 127 thermal break strip lines sau tias 98% stability ntawm output thaum backpressure nyob ib ncig 8–12 MPa.

Xyuas xyuas sijhawm nyob rau hauv qhov chaw kom tsis txhob muaj qhov khib nyiab ua ntej

Sau cov ntaub ntawv nyob rau hauv qhov chaw xa khoom txog saum 45 feeb kom tsoj kev sib po uas cuam tshuam mus rau kev tso khoom. Cov kuab nkhaus muaj qhov kho tshwj xeej thiab muaj L/D ratio zoo (28:1 to 30:1) reduces residence time by 35% compared to standard designs.

Cov kev pab cuam ntsheujsa tsim nyog rau kev coj yuav khoom siv

Cov load cells (±0.5% accuracy) sib xyis nrog cov sensor torque tuaj yeem kho tau kev sib thooj raws li kev hlo sib txwv hauv bulk density txog 15%. Cov kev sim tau pom tias cov kev pab cuam no yuav txo kev lag luam los ntawm kev xa khoom sai sai los ntawm 60% nyob rau hauv kev tsim khoom thermal break strip

Kev txhim kho kev daws teeb meem los ntawm kev xyaum tshawb nrhiav nyob rau hauv kev tsim khoom thermal break strip

Kev txiav txim siab rau qhov flow ntawm pellet tsis zoo nyob rau hauv ib lub chaw tsim khoom aluminum profile nyob Europe

Nyob rau hauv lub tsev kawm muaj chaw tsim khoom nyob Europa, lawv muaj teeb meem uas tsis ncav cuag rau hauv qhov kev tsim khoom uas txhua ob peb ntawm cov khoom siv dhau los ua pov hauv kev tsim los ntawm kev sau ua zog tsis zoo. Tom qab nrhiav kom pom cov caij nyoog, cov neeg kho mob pom tias muaj ob qho teeb meem tseem ceeb nyob ze tshaj plaws. Thaum pib, sauj npawb hauv lub xov to mloog tuaj yeem tshwm sim dua li 27 degrees Celsius, uas tuaj yeem tshab tshab cov duab ntawv khi los ua ke thaum kev tsim kho. Thaum kawg, muaj ntau yam dej nyob hauv cov duab ntawv roj ua dua, nyog li 0.12 percent los ntawm sab ntau, tsis hais txog tias tau siv kev txhim kho txaus. Thaum lawv sim ntxiv nrog infrared sensors thiab kev siv torque rheometry, lawv pom ib qho noj nuav tshwm sim ntev dua li xav tau. Qhov thermal degradation tau tshwm sim nyog li 18 percent ua ntej rau hauv cov duab ntawv no, kom rau tej chaw tsim khoom tseem ceeb raws li kev surov published rau hauv European Polymer Journal nyob ib xyoo 2023.

Kev sau ntxiv cov xov tooj tso cua sov kom txoj kab uas tshuab tsis tuaj yeem kub

Plej nram no tau muab kho qhov chaw pib npaum li:

• Ib lub tog num tso cua sov uas tso kom kub zeem ntawm 18–20°C
• Ib lub ntaub ntawv tiv thaiv kev sib ntxim uas txo qhov nyeej dej los ntawm 57%
• Ib chav npaum roj teeb uas pab txhim kho qhov npaum siab dua li 22%

Thaum sau tom qab, thaj chaw npaum tau zoo ib yam rau tag nrho qhov sib txawv, thiab qhov sib txawv hauv qhov npaum tawm yog 14.3 mus zuj zus 3.8.

Hoppers Txiag Nrog Rau Load Cells Thiab Kev Sau Ntawv Txheej Txheem

Txoj kev tsim kho tshiab tshaj plaws no muaj load cells thiab vibration sensors uas tuaj yeem sau ceeb toom meej li cas khoom nyob hauv, thaum kawg los daim ntawv rai ntau xws li silica modified PVC powder. Thaum cov systems meej-txheej no pom muaj dab tsi tsis raug, lawv yuav pab kho qhov speed thiab tsoj caij kom rov qhov chaw uas tsis zoo ua ntej muaj qhov blockage tas li. Txhawm rau 18 txoj kev siv sib txawv, cov neeg siv tswj xyuas tsuas yog tsum tau mus pab ib feem dua li rau cov thermal break strip lines tshiab dua li cov model cu. Ib tug report tshaj tawm hais txog Plastics Technology hais tias nyob rau hlis 2024, muaj kev pab ntau hauv kev siv thaum siv cov monitoring systems no.

AI Driven Predictive Maintenance for Single Screw Extruder Feeding Systems

Kev lag lwm tshuaj tawg kuv tswv yim xav txog kev hloov pauv ntawm kev cuam tshuam thiab sau cov duab ntawm kev siv hluav taws xob rau kev pom tus neeg sau nrog lossis qhov chaw muaj leej twg raug mob, ua ntej thaum tsuas yog muaj teeb meem. Txhawb tseem ceeb hais tias lawv tau pom tias thaum siv AI systems uas sib xyuas nrog kev hloov ntau hauv qhov chaw sov khoob thiab kev tshwm sim ntawm kev tso zis, nyob rau hauv Industrial AI Journal xyoo no, ib lub chaw ua haujlwm tau pom tias lawv muaj teeb meem tsis paub tuaj los txo li 40%. Qhov uas tsim nyog tshaj plaws rau cov kev tswj hwm no yog lawv tus cwj pwm ntawm kev hloov kho settings los yog xa mus rau kev kho kom sai sai thaum tsis muaj kev tsim khoom, uas pheej tau kom txoj haujlwm tsim khoom tsis tas mus.