Kev taw qhia txog txheej txheem
Extrusion moldingyog ib qho kev tsim khoom tas mus li uas cov khoom siv thermoplastic yog yaj hauv ib lub thawv uas muaj cua sov los ntawm cov ntsia hlau rotating thiab tom qab ntawd raug yuam los ntawm lub cev tuag los tsim ib qho profile nrog tus ntoo khaub lig tas li -section. Tsis zoo li kev txhaj tshuaj molding, uas ua rau lub kaw pwm kab noj hniav los tsim cov khoom sib cais, extrusion molding muab qhov ntev ntawm cov khoom tsis cuam tshuam -cov kav dej, cov raj, cov kab, kab, cov nplooj ntawv - uas loj, txias, thiab txiav downstream. Cov txheej txheem muaj nuj nqis rau nws cov khoom siv siab, qis ib -meter tus nqi, thiab muaj peev xwm los tswj ntau yam ntawm cov khoom siv polymers los ntawm cov khoom siv PVC mus rau engineering- qib polycarbonate.
Extrusion molding yog txheej txheem molding nrog ntau yam kev hloov pauv, kev tsim khoom siab, muaj zog yoog raws, daim ntawv thov dav thiab qhov loj tshaj plaws hauv kev ua cov khoom siv yas.
Extrusion molding yog ua kom tsis tu ncua zoo li cov polymer yaj los yog kua nplaum los ntawm ib qho kev tuag nyob rau hauv qhov kev txiav txim extrusion ntawm cov ntsia hlau los yog plunger ntawm lub extruder. Qhov tshwm sim yog qhov txuas txuas ntxiv nrog cov seem zoo li qub.
Cov txheej txheem polymer extrusion tuaj yeem tawg mus rau hauv ib ntu ntawm cov theem tswj nruj, txhua qhov cuam tshuam rau qhov kawg ntawm qhov zoo. Raw resin-pellets, granules, los yog hmoov- yog loaded rau hauv lub ntiajteb txawj nqus- pub hopper mounted saum lub extruder chim. Los ntawm qhov ntawd, cov khoom nkag mus rau hauv lub caj pas pub thiab raug xa mus rau pem hauv ntej los ntawm kev tig ntsia hlau. Raws li cov resin taug kev raws lub thoob, cov khoom siv hluav taws xob sab nraud thiab sab hauv shear kev sib txhuam nce qhov kub nce mus txog thaum cov khoom mus txog lub xeev tag nrho. Cov ntsia hlau tsim- nws qhov dav dav dav dav, qhov sib piv compression, thiab L / D ratio- ncaj qha cuam tshuam qhov sib xws ntawm cov yaj yog plasticized, uas yog vim li cas cov yas extruder tsim feem ntau suav hais tias yog qhov pib ntawm DFM tshuaj xyuas rau cov haujlwm extrusion.
Thaum cov yaj tawm ntawm lub thoob, nws raug thawb los ntawm lub phaj tawg uas haum nrog cov khoom siv tshuaj ntsuam uas lim tawm cov kab mob thiab tsim rov qab-siab kom zoo dua sib xyaw. Lub filtered yaj ces nkag rau hauvextrusion tuag tsim qauv, qhov twg cov ntws channel geometry ua nws rau hauv lub hom phiaj hla -section. Tom qab tawm hauv qhov tuag, qhov tseem - mos extrudate dhau los ntawm qhov loj me thiab qhov chaw txias txias - feem ntau yog lub tshuab nqus tsev calibration tank rau hollow profiles, los yog chilled rollers rau daim ntawv tiaj tus- ua ntej lub downstream rub rub nws ntawm kev tswj ceev. Thaum kawg, tus ya-pom los yog teb cutter ntu ntu txuas mus rau qhov ntev, ua tiav cov txheej txheem extrusion cov kauj ruam los ntawm cov khoom siv raw mus rau qhov tiav.
Yas extruder yog lub tshuab tseem ceeb hauv txhua txoj kab extrusion. Nws muaj lub hopper rau kev pub khoom noj, lub taub rhaub dej kub, thiab ib los yog ntau dua screws uas conveying, compress, thiab plasticize cov resin. Ib leeg- ntsia hlau extruders yog qhov feem ntau configuration rau profile thiab yeeb nkab ntau lawm; lawv muab kev ua haujlwm yooj yim, kev saib xyuas tsis zoo, thiab cov txiaj ntsig zoo sib xws rau feem ntau cov thermoplastics. Twin- ntsia hlau extruders muab kev sib xyaw ua ke zoo dua thiab nyiam dua rau kev sib xyaw ua ke, xim masterbatch dispersion, thiab ua cov cua sov- cov ntaub ntawv rhiab heev xws li PVC tawv. Cov ntsia hlau txoj kab uas hla -xws li ntawm 20 mm ntawm lab- nplai units mus rau ntau tshaj 200 mm ntawm cov yeeb nkab loj - txiav txim siab qhov siab tshaj plaws. Thaum ntsuam xyuas cov yas extruder rau ib txoj haujlwm tshiab, cov ntsiab lus tseem ceeb los sib piv suav nrog cov ntsia hlau L / D piv, lub cev muaj zog torque, chim cheeb tsam suav, thiab kev ua haujlwm siab tshaj plaws.
Tsis yog tag nrho cov thermoplastics tuaj yeem ua tiav los ntawm extrusion.
Cov ntaub ntawv hauv paus muaj xws li cov ntaub ntawv nyuaj thiab cov ntaub ntawv elastic.
Cov ntaub ntawv nyuaj: PVC, PC, PETG, ABS, PP, hips, PMMA, LDPE, HDPE, POM, ASA, PA, as, EVA, PC + ABS, thiab lwm yam
Elastic cov ntaub ntawv: PVC, TPU, TPE, Poe, TPR, TPV, TPEE, thiab lwm yam
Xaiv txoj cai resin mus dhau qhov sib piv cov khoom siv luv luv rau cov khoom lag luam. Txhua lub polymer coj nws tus kheej yaj tus cwj pwm, shrinkage tus nqi, thiab post-extrusion dimensional stability, tag nrho cov uas rov qab mus rau hauv lub DFM tsom xam rau lub extruded yas seem. Rigid PVC, piv txwv li, yuav tsum tau tswj qhov kub thiab txias thiab ua kom muaj zog tag nrho vim nws muaj kev cuam tshuam rau thermal degradation; ib tug tsis zoo tsim channel ntws yuav ua rau cov khoom stagnation thiab dub specks ntawm qhov profile nto. CovUa tiav PVC extrusion txheej txheem qhiakuj xav tau cov ntsia hlau geometry tshwj xeeb-feem ntau yog qis- compression- piv, barrier- dav hlau ntsia hlau- kom tsis txhob overheating cov resin.
Nyob rau hauv sib piv, polyolefins zoo li HDPE thiab PP yog ntau zam txim nyob rau hauv cov nqe lus ntawm kev ua lub qhov rais, tab sis lawv muaj ntau dua tuag swell thiab ntau dua crystallization shrinkage, yog li phab ntsa - thickness uniformity thiab txias npaum li cas yog qhov tseem ceeb tsim kev txhawj xeeb. Engineering resins xws li PC thiab PMMA xa qhov pom kev pom tseeb thiab cuam tshuam lub zog rau cov teeb pom kev zoo diffusers thiab cov ntawv npog, txawm hais tias lawv cov viscosity siab dua hu rau lub zog extruder tsav thiab hardened tuag hlau. Rau cov ntawv thov uas xav tau ob qho tib si rigidity thiab mos foob hauv ib qho profile,co-extrusion PVC profilesua ke cov txheej txheem substrate (feem ntau nruj PVC los yog ABS) nrog ib tug elastomeric overmold (TPE los yog TPV) los tsim ib tug dual - durometer extruded yas ib feem nyob rau hauv ib tug pass.
Tuag thiab Tooling Design
Lub extrusion tuag txhais ib 2-D profile kos duab rau hauv lub cev ntws channel uas yuav tsum xa cov polymer molten ntawm ib qho kev sib tw nrawm thoob plaws tag nrho cov ntoo khaub lig-section. Ua kom tiav qhov sib npaug no yog qhov kev sib tw hauv nruab nrab ntawm cov yas extrusion tuag tsim. Ob qhov tsis tseem ceeb tshaj plaws: thaj av ntev thiab ntws -channel qhov tob. Cov av yog qhov kawg ntawm qhov sib npaug ntawm qhov qhib tuag; nws imparts "nco" rau yaj, stabilizing lub extrudate zoo li nws tawm. Txoj cai pib dav dav yog thaj av -ntev- mus rau- phab ntsa-thickness piv ntawm yam tsawg kawg nkaus 10 : 1-lub ntsiab lus ntawm phab ntsa 2 hli hu rau thaj tsam li 20 mm ntawm av. Cov av luv luv ua rau cov txheej txheem ntau dua rau qhov ntsuas kub thiab qhov hloov pauv ceev, thaum cov av ntev heev tuaj yeem ua rau tsis sib xws ntawm cov cua txias thiab qhov seem ntawm kev ntxhov siab.
Flow balancing los tom ntej. Qhov twg qhov profile muaj ob qho tib si tuab thiab nyias, cov cheeb tsam tuab yuav txav nrawm dua los ntawm kev tuag. Tooling engineers them los ntawm lengthening av nyob rau hauv ceev ceev-flow regions los yog inserting flow restrictors upstream. Rau puag ncig lossis annular geometries-xws li cov uas pom nyob rau hauv cov yeeb nkab yas extrusion cuab yeej-mandrel pins muab tso rau hauv qhov tuag los ua lub hollow bore, thiab kab laug sab ob txhais ceg los yog kauv distributor channel khaws cov yaj sib npaug zos nyob ib ncig ntawm tus pin. Kev tuav tag nrho compression thoob plaws hauv qhov tuag, adaptors, thiab cov phaj hloov pauv yog qhov tseem ceeb; txhua qhov chaw tuag qhov twg cov khoom tuaj yeem ua rau tsis zoo yuav ua rau lub sijhawm kawg thiab paug cov extrudate, qhov teeb meem tshwj xeeb tshaj yog thaum khiav nruj PVC lossis polycarbonate.
Raws li kev tsim ntawm kev txhaj tshuaj molded qhov chaw thiab txhuas extruded qhov chaw, cov phab ntsa tuab yog qhov tseem ceeb heev.
Yog tias cov phab ntsa tuab ntawm cov yas extrusion tsis sib npaug, qee qhov chaw yog tuab thiab qee qhov yog nyias, uas ua rau cov dej ntws tawm ntawm cov yas extruded nyob rau hauv qhov tuag tsis sib npaug, uas ua rau cov cua txias sib txawv thiab nws thiaj li deformation ntawm cov khoom.
Yog tias qhov deformation yuav tsum tau tswj hwm, cov txheej txheem txias ntxiv yuav tsum tau ntxiv los txo cov kev ua haujlwm ntawm cov kab ntau lawm thiab nce tus nqi ntau lawm.
Vim tias cov yas extrusion yog cov txheej txheem tas mus li, lub zog ntawm qhov extruded yog tsawg thaum nws tsuas yog extruded, thiab nws yuav tsum tau txais kev txhawb nqa los ntawm huab cua siab thiab mandrel kom nws cov duab thiab tsis txhob deformation, thaum lub hollow seem tsis tuaj yeem muab kev txhawb nqa, thiab cov qauv hollow complex tsuas tuaj yeem pom tau los ntawm kev qhib seem.
Tube, Tube, thiab Corrugated Tubing Tooling
Yas yeeb nkab extrusion cuab yeejthiab tubing sawv cev rau ib qho ntawm ntau tshaj - ntim daim ntawv thov ntawm extrusion, thiab lawv cov kev xav tau ntawm cov cuab yeej sib txawv ntawm cov khoom lossis cov ntaub ntawv qhib. Cov yeeb nkab yas extrusion cuab yeej tsim cov lus qhia feem ntau pib nrog lub annular tuag thiab mandrel sib dhos. Lub mandrel tsim lub puab bore thaum lub concentric txheej nplhaib txhais lub sab nraud; qhov sib txawv ntawm lawv teev cov phab ntsa thickness. Tom qab cov yaj tawm ntawm qhov tuag, qhov tseem - lub raj mos nkag mus rau hauv lub tshuab nqus tsev sizing lub tes tsho uas tuav txoj kab uas hla sab nraud mus rau qhov tshwj xeeb thaum lub siab me ntsis sab hauv ua kom lub raj tsis txhob tawg.
Rau du -phab ntsa tubing- cov kab kho mob, pneumatic hose, cable conduit-wall concentricity yog thawj qhov kev ntsuas zoo, yog li lub mandrel yuav tsum nyob hauv nruab nrab ntawm microns thiab cov yaj yaj yuav tsum yog kauv lossis lub tsho tiv no- hom hanger kom tsis txhob muaj cov kab sib txuas. Corrugated yas tubing ntxiv lwm txheej ntawm complexity: ib txheej ntawm kev mus ncig pwm blocks (los yog corrugator) downstream ntawm cov tuag qhib thiab kaw nyob ib ncig ntawm lub extrudate nyob rau hauv ib ntus, tsim cov alternating peaks thiab hav uas muab lub tubing nws axial yooj thiab crush kuj. Cov txheej txheem tsim rau corrugated extrusion cuab yeej yuav tsum suav rau cov pwm- thaiv lub suab, lub sijhawm nqus ntawm txhua qhov corrugation, thiab cov resin lub peev xwm ncav cuag rau hauv pwm kab noj hniav yam tsis muaj thinning ntau dhau. Ob qho tib si - phab ntsa corrugated conduit thiab ob chav - phab ntsa corrugated ntws yeeb nkab cia siab rau lub tswv yim ntawm cov cuab yeej no, txawm tias phab ntsa - qauv tsim thiab kev xaiv resin (feem ntau HDPE lossis PP) txawv ntawm ob.
Me -inch yas tubing extrusion-hais tias, qis dua 10 hli OD-thov kom nruj dua rau ntawm qhov sib txawv ntawm qhov tuag thiab ua kom txias dua, vim tias qhov kub thiab txias hloov pauv yog feem ntau ntawm cov phab ntsa hla- ntu. Thaum qhia txog cov cuab yeej siv rau cov ntawv thov no, nws tsim nyog sab laj tus neeg muag khoom extrusion tus qauv tsim phau ntawv qhia kom paub meej tias lawv tus qauv muaj peev xwm ntawm phab ntsa eccentricity, ovality, thiab txiav -ntev qhov tseeb ua ntej cog lus rau kev tsim khoom.
Lub kaum ntse ntse ntawm qhov extrusion yuav dhau los ua qhov tsis muaj zog ntawm extrusion vim yog kev ntxhov siab, uas yog qhov ua rau tawg lossis tsis ua haujlwm, thiab yuav txo qhov cuam tshuam ntawm extrusion.
Nyob rau hauv qhov chaw extruded, cov ces kaum ntse yuav tsum zam kom ntau li ntau tau, thiab cov ces kaum sib npaug yuav tsum tau ntxiv ntawm cov ces kaum ntse. Lub vojvoog fillet yog sib npaug ntawm phab ntsa tuab ntawm cov khoom, uas pab cov khoom ntws zoo dua nyob rau hauv cov txheej txheem extrusion thiab txo qhov kev ntxhov siab ntawm contour fab.
Lub kaum ntse ntse ntawm qhov extrusion yuav dhau los ua qhov tsis muaj zog ntawm extrusion vim yog kev ntxhov siab, uas yog qhov ua rau tawg lossis tsis ua haujlwm, thiab yuav txo qhov cuam tshuam ntawm extrusion.
Nyob rau hauv qhov chaw extruded, cov ces kaum ntse yuav tsum zam kom ntau li ntau tau, thiab cov ces kaum sib npaug yuav tsum tau ntxiv ntawm cov ces kaum ntse. Lub vojvoog fillet yog sib npaug ntawm phab ntsa tuab ntawm cov khoom, uas pab cov khoom ntws zoo dua nyob rau hauv cov txheej txheem extrusion thiab txo qhov kev ntxhov siab ntawm contour fab.
Ntawm qhov kev sib tshuam ntawm ntau phab ntsa, cov cheeb tsam uas muaj cov phab ntsa tuab feem ntau yog tsim, yog li nws yog ib qho yooj yim los tsim shrinkage thiab cov tsos tsis zoo nyob rau sab nrauv ntawm extrusion, uas zoo ib yam li kev txhaj tshuaj molding.
Yog hais tias lub extrusion yog ib qho kev tshwm sim, lub shrinkage yuav raug zam los yog npog los ntawm qhov optimization tsim nyob rau hauv daim duab hauv qab no.
DFM Cov Tswv Yim rau Txo Cov Nqi Extrusion
Kev siv DFM cov hauv paus ntsiab lus thaum ntxov hauv lub voj voog tsim yog ib txoj hauv kev zoo tshaj plaws los tsav tus nqi tawm ntawm cov yas extruded profile yam tsis muaj kev txi. Ib txhia tswv yim tswv yim feem ntau overlooked.
Ua ntej, sib sau ua ke. Yog tias lub rooj sib txoos tam sim no siv ob lossis peb qhov sib cais sib txuas ua ke, ntsuas seb ib qho co-extruded seem tuaj yeem hloov pauv tau. Tsawg qhov chaw txhais tau tias tsawg dua tuag, tsawg dua kev ua haujlwm thib ob, thiab txo cov neeg ua haujlwm sib dhos- yeej ncaj qha los ntawm DFM plastics engineering foundations.
Thib ob, txo qhov chaw nyob ze ntawm cov seem hollow. Txhua qhov khoob khoob khoob khoob khoob khoob khoob khoob khoob khoob khoob khoob khoob khoob khoob khoob khoob khoob khoob khoob khoob khoob khoob khoob khoob khoob khoob khoob khoob khoob khoob khoob khoob khoob khoob khoob khoob khoob khoob khoob khoob khoob khoob khoob khoob khoob khoob khoob khoob khoob khoob khoob khoob khoob khoob khoob khoob khoob khoob khoob. Qhov twg lub channel kaw tag nrho tsis tsim nyog, xav hloov nws mus rau C-channel nrog snap- hauv cap; Qhov no ua kom yooj yim cov cuab yeej thiab shortens tuag txhuas lub sij hawm.
Thib peb, tsim qauv rau cov khoom siv qis qis. Yog hais tias lub hom phiaj txiav ntev tuaj yeem ua tiav nrog tus qauv ya pom es tsis yog lub tshuab txiav servo precision, tus nqi ib -unit poob. Ib yam li ntawd, tsim cov nta snaps thiab mounting qhov uas tuaj yeem raug punched inline- dua li CNC-machined offline- ua kom cov txheej txheem tsis tu ncua thiab cov ntsiab lus ua haujlwm tsawg.
Thaum kawg, qhia cov ntawv sau nrog koj tus neeg xa khoom extrusion ua ntej khov qhov tsim. Cov kws tshaj lij cov cuab yeej siv tau feem ntau tuaj yeem hais qhia me me geometry tweaks - ntxiv lub kaum sab xis ntawm no, hloov lub vojvoog nyob rau ntawd - uas ua kom zoo dua qhov sib npaug tuag thiab ua ntej - kis tawm. Qhov zoo li no thaum ntxov -theem DFM tshuaj xyuas rau cov khoom yas yog dab tsi cais cov profile uas ua haujlwm zoo ntawm ib qho uas yuav tsum muaj kev cuam tshuam tus neeg ua haujlwm tas li.
Yog tias ua tau, kev ua siab ntev ntev yuav tsum zam kom deb li deb tau. Thermoplastics txo qis thiab nthuav dav nrog qhov kub thiab txias, thiab txiav cov yas extrusion mus rau qhov ntev tseem ceeb yuav tsis tsim nyog nce nqi.
Feem ntau, qhov kam rau ua yog + / - 5 hli ntawm 1000 mm ntev extrusion. Tau kawg, qhov kam rau ua qhov tseeb yog cuam tshuam nrog qhov ntev. Qhov luv luv, qhov siab dua qhov tseeb tuaj yeem ua tiav.
Yog tias ua tau, kev ua siab ntev ntev yuav tsum zam kom deb li deb tau. Thermoplastics txo qis thiab nthuav dav nrog qhov kub thiab txias, thiab txiav cov yas extrusion mus rau qhov ntev tseem ceeb yuav tsis tsim nyog nce nqi.
Feem ntau, qhov kam rau ua yog + / - 5 hli ntawm 1000 mm ntev extrusion. Tau kawg, qhov kam rau ua qhov tseeb yog cuam tshuam nrog qhov ntev. Qhov luv luv, qhov siab dua qhov tseeb tuaj yeem ua tiav.
Feem ntau tsis xws luag hauv Extruded Yas Qhov Chaw
Txawm tias muaj ib tug zoo-engineered tuag thiab ib tug optimized extrusion molding txheej txheem, defects yuav nto yog hais tias tus txheej txheem tsis drift. To taub lub hauv paus ua rau txuag downtime thiab seem.
Melt tawgzoo nkaus li ntxhib, sharkskin -zoo li kev ntxhib los mos ntawm qhov profile nto. Nws yog tshwm sim los ntawm kev ntxhov siab ntau dhau ntawm daim di ncauj tuag thiab feem ntau tshwm sim hauv siab -viscosity resins xws li HDPE thiab linear LLDPE. Kev txo cov kab nrawm, nce qhov kub thiab txias, lossis nthuav qhov sib txawv ntawm qhov tuag tuaj yeem ua rau qis dua qhov tseem ceeb. Cov kab tuag-nyias, nruam streaks khiav nyob rau hauv lub extrusion kev taw qhia-feem ntau taug qab mus khawb los yog buildup nyob rau hauv tuag av; periodic polishing ntawm daim di ncauj tuag yog tus qauv kho.
Warpage tom qab txiav feem ntau yog qhov tshwm sim ntawm asymmetric txias. Yog hais tias ib sab ntawm qhov profile pom ntau airflow los yog dej sib cuag dua li lwm tus, residual stress builds unevenly thiab ib feem bows thaum nws so. Kev kuaj xyuas qhov kev sib raug zoo ntawm cov tshuab cua txias thiab cov tshuab nqus tsev vacuum calibrator yog thawj kauj ruam. Rau cov txheej txheem nyuaj nrog ob phab ntsa tuab thiab nyias, ntxiv cov cua txias hauv zos ntawm sab thicker tuaj yeem sib npaug ntawm qhov shrinkage.
Voids thiab npuas nyob rau hauv cov phab ntsa feem ntau taw tes rau ya raws nyob rau hauv lub resin los yog tsis txaus venting nyob rau hauv lub extruder chim. Ua ntej- ziab cov ntaub ntawv hygroscopic (PA, PC, PETG) rau lawv cov ntsiab lus noo noo pom zoo- feem ntau qis dua 0.02 %- ua ntej pub mis yog qhov tseem ceeb. Yog tias npuas tseem nyob, qhov chaw nres nkoj chim yuav raug ntsaws, los yog lub hau ntswj ceev yuav siab dhau rau lub thoob qhov chaw decompression kom degas zoo.
Ncej -Kev Ua Haujlwm Extrusion thiab Ua tiav
Cov kab extrusion ua rau qhov ntev ntawm qhov txuas mus tas li -section, tab sis feem ntau kawg - siv daim ntawv thov yuav tsum tau ua ntxiv ua ntej qhov profile yog npaj rau kev sib dhos. Cov kev ua haujlwm thib ob feem ntau suav nrog kev txiav kom ntev, CNC routing ntawm notches thiab slots, drilling los yog xuas nrig ntaus ntawm mounting qhov, thiab kub stamping los yog pad printing rau branding. Qee qhov yas extruded kuj raug khoov-txawm yog khoov txias rau cov nkhaus maj mam lossis kub bending rau nruj radii-kom ua raws li cov duab ntawm cov khoom kawg.
Cov txheej txheem txheej txheej yog nyob ntawm cov polymer. ABS thiab tawv PVC txais cov xim thiab cov nplaum nplaum zoo, thaum polyolefins feem ntau xav tau nplaim taws lossis corona kho kom zoo dua lub zog saum npoo ua ntej luam ntawv lossis gluing. Rau kev siv teeb pom kev zoo thiab tso saib,PC thiab PMMA lub teeb diffuser npogtej zaum yuav tau txais ib qho kev ntxhib los mos ntawm inline embossing yob es tsis yog post- txheej txheem sandblasting, uas ua rau kev ua haujlwm nyob rau hauv txoj kab extrusion thiab zam kev puas tsuaj. Kev npaj rau cov kauj ruam nram qab no thaum lub sij hawm pib qhov profile tsim- tawm kev tshem tawm rau cov clamp fixtures, ntxiv nrhiav cov ntaub ntawv rau CNC ua haujlwm- yog ib qho ncaj nraim DFM xyaum uas tiv thaiv cov nqi rov ua dua tom qab.
Cov txheej txheem yas extrusion yog tsib- theem ua haujlwm: (1) cov khoom siv raw yog lub ntiajteb txawj nqus- pub los ntawm lub hopper rau hauv lub thoob extruder; (2) lub rotating ntsia hlau conveys thiab melts cov ntaub ntawv los ntawm kev loj hlob chim cheeb tsam; (3) cov molten polymer yog lim thiab yuam los ntawm qhov tseeb tuag uas txhais cov duab profile; (4) lub extrudate yog txias thiab dimensionally stabilized nyob rau hauv lub tshuab nqus tsev calibration tank los yog nyob rau hauv txias yob; thiab (5) lub ruber rub tawm cov ntaub ntawv ruaj khov ntawm kev tswj ceev ua ntej nws txiav mus rau qhov ntev yuav tsum tau ua. Cov txheej txheem variables xws li chim kub profile, ntsia hlau RPM, yaj siab, thiab thauj -off ceev yuav tsum tau sib koom ua ke kom ntseeg tau tias cov extrusion tiav raws li qhov ntev thiab cov qauv zoo. Cov txheej txheem polymer extrusion no siv sib npaug rau cov kav dej yooj yim, ntau-kab kab noj hniav qhov rai, thiab nyias- phab ntsa teeb pom kev zoo diffuser npog.