Yuav ua li saib seb yuav xaiv li cas ntawm single screw thiab twin screw extruders rau PA66 thermal break strips?

Qhov sib txawv tseemceeb ntawm Single Screw thiab Twin Screw Extruders hauv PA66 Processing

Qhov sib txawv tseemceeb hauv kev ua haujlwm thiab kev siv ntawm single screw thiab twin screw extruders

Lub chaw tso tawv tsiv ntaus hniav muaj ib qhov roj teeb twg uas tso cov khoom sib zog los ntawm kev sib nqes nrog lub hnab tshav kaw. Lub tsheb no muaj qhov chaw tsim nyob rau hauv, yog li lawv feem ntau siv yam ntxwv tshaj li 20 mus 30% tshaj li lwm yam khoom siv raws li cov ntaub ntawv nram qha los ntawm Polymer Processing Report los ntawm 2023. Tab sis, lawv tsis sib nrig zoo li qhov yuav tsum tau. Tom qab ntawd, lub chaw tso tawv tsiv ntaus hniav ob tug muaj ob lub ntaus hniav uas raug sib sau ua ke thaum lawv ncig. Lawv txhawm kom ua zoo li ob lub rolling pins loj rau cov duab tog, tso tawm thiab sib nrig cov khoom siv thaum nws ncig mus. Qhov kev xaiv no pab rau tus neeg tsim khoom tau sau mloog zoo dua thaum lawv xav kom tag nrho cov khoom tau sib nrig thiab tso tawm tas li tag nrho lub khoom tsim.

Cov kev xav tau rau kev tsim khoom PA66 thiab cov nyhuv nyhav rau kev tsim khoom

Kev them PA66 yuav tsum sau nruj kub ntawm qhov chaw dab tsi li 260 mus rau 270 degrees Celsius yog tias peb xav tau kev pab uas zoo tsis txhob pu tsuas siv. Kev kho mob uas tau tso rau hauv Lub Npe Journal of Advanced Polymers thaum 2022 tau pom ib yam no zoo. Cov chav tsim kav tsho tshiab feem ntau hlo tshwv thiab muaj qhov kub hlo tshwv los ntawm li 8 degrees, tab sis cov chav tsim kav tsho ob feem ntau tuaj yeem tswj kub meej dua li li 3 degrees. Qhov no ua rau muaj qhov sib txawv loj thaum siv PA66 vim tias nws thiaj ploj tawm thaum kub tshaj li 15 degrees saum qhov kub uas nws feem ntau khiav. Rau cov neeg tsim khoom uas tsim PA66 ntau, kev tswj kub zoo no yog qhov sib txawv ntawm kev tsim khoom zoo thiab kev tsim khoom tsis zoo los ntawm kub ntau.

Kev Sib Chims Thiab Kev Tsim Khoom Nyob Rau Hauv Chav Tsima: Kav Tsho Ib Feem Vs Kav Tsho Ob Feem Rau PA66

Kev Muaj Siab Hlau Thiab Kev Tswj Khib Nyiab Nyob Rau Hauv Kav Tsho Ib Feem

Qhov ua kom sov nyob rau hauv tus extruders tsis muaj ntau tshaj li ib qhov muab los ntawm kev sib nqum uas tau rau los ntawm kev kuaj xyuas thiab kom sov los ntawm lub tsev kaw. Cov chais no ua haujlwm zoo rau cov PA66 tsoom tshaj plaws, tab sis lawv muaj qhov chaw tshwj xeeb nyob rau hauv kev tsim khoom ntau lossis thaum sau ua cov khoom uas yooj yim sov. Ib txhiab tus tsha tseem ceeb tuaj yeem tiv thaiv txog 150 kg saib xyuas ib teev rau cov khoom siv tshaj tawv raws li cov ntaub ntawv industry ntxiv tshiab xyoo npog. Tab sis cov teeb meem pib tshwm sim thaum sau ua cov khoom siv tshuab vim tias cov chais tsis tuaj yeem tswj kom sov zoo. Qhov no feem ntau cuam tshwv rau qhov chaw sov tshwm sim nyob rau qhov chaw tshwj xeeb uas nce siab tias yuav ua rau cov khoom sov.

Kev Xaiv Tsawg ntawm Ib Qhov Muab Chaw nrog rau PA66 Siv Cov Ntaub Ntawv Nyob Rau Hauv Chaw

Qhov chaw tso ntxiv ntawm kev sib txuas tsis zoo ua rau muaj qhov nyiag siab tshaj plaws nyob rau hauv kev sib thooj nrog. Peb hais txog feem ntau li 15% thaum cov khoom sib txuas tau sau ua ke nrog cov khoom siv tshuab tso tseg PA66. Thaum tus lej ntawm cov kab ntim ntau dua 30%, yam no feem ntau yuav raug dhau los ntawm qhov chaw tso tseg, uas tsis zoo rau cov caij nyoog tseem ceeb rau yam khoom siv xws li thermal break strips nyob rau hauv kev tsim kho. Thiab tsi txhob saib tsis meej txog qhov sib txawv ntawm qhov sijhawm tso ntxiv. Qhov no tuaj yeem tsim kev puas tsuaj mus rau 5% ntawm cov dundeev nyob rau hauv cov kev tsim kho ntau qhov, yam uas cov neeg tsim khoom tsis xav pom vim nws tshwm sim rau ob qho: tus cwj pwm thiab tus nqi tsim khoom.

Caim ntawm kev txhim kho qhov chaw tso ntxiv rau kev txhim kho kev sib thooj nrog thiab kev nyiaj txwv

Cov ntsiab lus txhim kho tshuab tso ntxiv rau twin screw extruders yuav pab txhim kho kev sib thooj nrog PA66 los ntawm kev siv cov qhov chaw muaj feem xyuam tshwj xeeb:

• Kneading blocks ntsim ntau dua kev sib tshuam hauv qab ntuj los ntawm 40%, tshwj tsis pub daws rau kev muab lub nanoparticle mus siv
• Qhov sib xyaw rov qab txo obtog kub siab txaus li 15-20 °C los ntawm kev saib xyuas kev rov qab
• Kev hloov pauv qhov ntev ntawm kab tuaj yeem txhim kho qhov tsim nyog ntawm siab (± 2 MPa) hauv txhua cheeb tsam

Ob qho no pab tau rau kev tsim kho tshiab ntawm cov chaw ncig thiab muaj qhov hnyav tsawg tshaj 0.5 millimeters, uas yog qhov tseem ceeb rau kev ua haujlwm ntawm kev tiv thaiv kub hauv qhov chaw ncig

Kev tsim kho rau PA66 siv khoom sau ua ntej thiab kev sib sau ua ntej

Kev naux rau kev siv khoom siv PA66 uas muaj kab ntsug, khoom tiv thaiv dej thiab lwm yam khoom siv

Thaum siv PA66 compounds uas muaj cov sib txawv lossis flame retardants, tus tshuab chaw ntxuav tsis siv rooj tsim tuaj yeem pheej hmog. Qhov chaw tshuab no siv lub zog shear nyob rau ib sab feem ntau tsim qhov siab tsis zoo tshwj tsis. Yog li ntawd, peb feem ntau pom tias cov kab ntsug yuav tsha paug dua 18% thaum cov ntaub ntawv muaj neeg ntxig 30% lossis ntau dua. Ntawm no yog qhov twg twin screw technology zoo dua. Cov chaw no muaj cov ntsiab lus uas nyob ib leeg uas tseem pab tswj kom cov kab ntsug ntev hauv qhov kev them nyiaj. Tseem txaus tshaj plaws, lawv tuaj yeem txog 95% hom kev faib cov ntaub ntawv uas tsim qhov txiaj ntsig rau cov khoom uas xav tau kev ruaj khov zoo, tshaj tshiab hauv kev siv uas yuav tsum muaj thermal breaks nyob saum cov khoom.

Twin Screw Extruders hauv Reactive Extrusion thiab High-Additive-Content Formulations

Cov kauj nrig sib txig nrog cov roj nrov tso rau hauv qab no tuaj zoo tshaj plaws rau kev tsim kho thiab thaum siv cov khoom siv uas muaj ntau yam ntxuav nrog. Xav txog PA66 nrog ntau dua 20% kho mob lossis cov khoom siv tshwj tsis muaj halogen. Qhov kho tshiab ntawm chav tsim kho tau rau tus neeg tsim kho tso cov khoom siv uas nyuaj siab rau qhov chaw sib txawv ntawm chav tsim, uas txo qhov teeb meem ntawm kev sov. Ib co kev sim tau pom tias muaj kev txo ntau li 30% ntawm kev sov khoom siv kompared rau cov kev tsim kho dhau los. Feem no yuav tsum tau xyuas xyuas tshaj qhov tseem ceeb thaum siv cov khoom siv endothermic xws li magnesium hydroxide. Cov khoom no yuav tsum tau xyuas xyuas saib xyuas nyob rau sab saud 260 thiab 280 degrees Celsius kom nyob ib txwm zoo hauv kev tsim kho.

Kev Nyuaj Siab ntawm Shear thiab Teeb Meem ntawm Filler Dispersion hauv Single Screw Systems

Qhov sib txooj siab tseem ceeb hauv qhov chaw tso tshua tseem ceeb tuaj yeem tsim qhov sib txawv ntawm qhov loj thiab txog threshold ntawm PA66 295 ° C thaum siv cov khoom siv. Qhov no cuam tshuam rau kev sib txawv ntawm kev sib xyaw, nrog kev sib txawv density ntawm ± 12% hauv cov khoom tso tshuaj, uas tsis raug rau hauv cov chaw sib sau ua ib cheeb tsam vim lawv yuav tsum muaj kev sib sau zoo ib yam.

Kev Tshuaj Xaub Txoj Kev Lag Luam, Kev Tshuaj Xaub, thiab Kev Tsis Muaj Kev Nyab Xeeb Hauv Kev Tso Tshuaj Ntawm Txoj Kev

KeV Sib Piv Kev Tshuaj Xaub Nyob Rau Hauv Kev Sib Txawv ntawm Shear thiab Thermal

Tswj hluav taws txoj cai siv cov khaub ncaws tsib ntxig feem ntau tuaj yeem muaj kev cuam tshuam ntau npaum li 18 rau 23 kilograms saum ib teev thaum siv pawg PA66. Tab sis qhov kev xa khoom yuav hlo li ntawm 30 rau 40% thaum siv cov duab ntawm polymer no uas muaj chaw ntxig los ntawm hlau, raws li cov ntsiab lus tshiab tshaj plaws los ntawm Plastics Industry Association los ntawm 2023. Cov chais tshuaj tsib ntxig ob leeg tuaj yeem tswj kev tsim kho zoo dua, nyob ib puag ncig 25 rau 35 kg/hr tsis xav txog seb muaj dab tsi chaw ntxig, vim tias lawv faib lub zog zoo dua hauv system. Tab sis, tus neeg tshuaj xyuas yuav tsum sau lub temperature rau cov chais tshuaj tsib ntxig ib leeg. Lub teperature yuav tsum nyob ib puag ncig plus lossis minus 2 degrees Celsius thaum loj dua 285 degrees kom tsis pub muaj kev puas tsuaj rau khoom thiab kom muaj kev cuam tshuam zoo.

Qhov Tshwm Txoj Cai Ua Haujlwm Ua Haujlwm Thiab Qhov Siab Tshaj Plaws

Thiab chug 24-teev nyob rau hauv kev tsim kho tshuab ntau dua, tshuab siv roj twg muaj ob lub srew nruab nrig txog ± 1.5 ° C, zoo dua li tshuab siv roj muaj ib lub srew nruab nrig uas muaj ± 3.5 ° C. Qhov tseem ceeb no tshem kub siab txog qhov ntev ntawm qhov roj mus rau hauv 0.1 millimeters - uas yog qhov tseem ceeb vim tias qhov sib txawv tsuas yog 0.12 millimeters tuaj yeem ua rau muaj kev plooj siab 19% rau hauv kev nruab qhov roj tshuab.

Kev Nce Ntau Thiab Kev Txaus Siab Nyob Rau Hauv Kev Tsim Kho Thermal Break Strip Txoj Cai

Rau hauv tshuab siv roj muaj ib lub srew, qhov nce ntau heev tshaj 60 MPa thaum siv PA66 tuaj yeem ua rau muaj qhov sib txawv ± 8% rau hauv qhov loj ntawm qhov roj. Lub tshuab muaj ob lub srew tso cai rau qhov nce ntau tseem ceeb nyob rau hauv 45-50 MPa. Thaum siv kev soj ntsuam roj nyob rau hauv teeb li teeb, lawv txhim kho lub srew thiab tso cai rau qhov ntev ntawm qhov roj nyob rau hauv ± 0.07 mm hauv 8-teev kev tsim kho.

Kev Kawm Ntawv Nthuav Taw: Tshuab Siv Roj Ib Lub Srew Vs Ob Lub Srew Rau Kev Tsim PA66 Nrog Kev Loj

Nthuav Taw Thaum Pib, Kev Saib Xyuas, Thiab Nthuav Taw Roj Nyob Rau Hauv

Caij ntawm tus nqi rau cov kav tsis muaj tsho tseem ceeb yog li 30 mus 50 feem pheej nyaut dua li cov chaw tso tsho tseem ceeb ob hlis raws li qhov tshuaj lom neeg Plastics Machinery Report los ntawm 2023, uas ua rau cov khoom no yooj yim txaus siab rau cov neeg ua haujlwm uas sau nqi nyiaj zoo. Tom qab ntawv, cov chaw tso tsho tseem ceeb ob hlis nyob zeem siv nyiaj li 18 mus 22 feem pheej nyaut dua li ib zaug thaum tsim kho PA66 uas muaj roj tshuab, vim muaj kev txhim kho zoo dua ntawm kev siv tshuab. Txog nqi siv rau kev saib xyuas, muaj qhov sib txawv loj meej ntawm ob qho no. Cov chaw tso tsho tseem ceeb ob hlis feem ntau muaj nqi saib xyuas ib xyoos uas nyob li 40 feem pheej nyaut dua vim lawv ruaj nphlag ntau dua thaum tsim kho cov khoom uas cuam tshuam. Tom qab ntawv, cov chaw tso tsho tseem ceeb ib hlis tsuas yog xav tau kev hloov pauv ib zaug li 3 mus 5 zaug kom meej rau PA66, uas ua rau nws yooj yim dua rau kev saib xyuas thiab hloov pauv nyob tam sim no.

Nqi Pauv Tag nrho Siv Los ntawm Kev Tsim Khoom thiab Qhov Nyob ntawm Khoom

Thaum tsim kho tshuab PA66 thermal strips nyob rau hauv qhov chaw ua lag luam me me li 50 mus rau 200 tons ib xyoo, tus tshuab siv roj ntxig single screw feem ntau yuav txo qhov muaj peev xwm tau txog 12 mus rau 15% rau cov resins uas tsis muaj ntaub. Tab sis yuav muaj kev sib txawv thaum sau ua PA66 uas muaj dav ntawm 25% ntawm sab nraud ntawm glass fiber. Nyob rau hauv lub sijhawm no, tus tshuab twin screw systems yuav pab tau hauv kev lag paub zoo dua raws li AMI Consulting los ntawm kev xam txheej 2023. Cov systems no kuj pab txo cov ntaub ntawv, txo qhov tsis hlo tshar tau li 8 mus rau 12%. Rau cov chaw ua lag luam uas tuaj yeem tuaj li ntau dua 150 hnub ib xyoo, twin screws muaj qhov tseem ceeb ntawm kev tswj lub teeb li cas uas tsis txo lossis nce ntau dua 1.5 degrees Celsius. Qhov tseem ceeb ntawm lub teeb no cuaca rau qhov tsis pub tshaj 5 mus rau 7% tshaj hauv single screw machines nyob rau hauv qhov kev xwm yeem zoo ib yam.