TSEEM CEEB
Kev txhais cov yeeb nkab
Muaj cov ntsiab lus sib txawv uas feem ntau cuam tshuam nrog kev lag luam sib txawv (xws li cov kav dej, cov kab xa hluav taws xob, cov dej haus, kev kho mob, mining, thiab lwm yam). Cov ntsiab lus nrov ntawm cov yeeb nkab yog tias nws yog nruj, hollow, ntev thiab loj nyob rau hauv txoj kab uas hla tshaj cov hlab. Tubings yeej zoo ib yam tshwj tsis yog lawv hloov pauv thiab me me hauv txoj kab uas hla, mus txog {{0}}.13mm (0.5in) lossis nrog cov phab ntsa nyias mus txog 15cm (6in).
Cov khoom tseem ceeb ntawm cov yeeb nkab extrusion kab
Cov txheej txheem hauv kab hauv kab (lossis tsheb ciav hlau) rau kev tsim cov yeeb nkab pib nrog cov khoom siv los ntawm cov khoom siv extruder, extruder thiab tuag, cov khoom siv rau sab nraud thiab sab hauv calibration ntawm cov kav dej hla ntu ntu, yog tias xav tau siv cov khoom siv. huab cua los yog nitrogen siab thiab / los yog lub tshuab nqus tsev, phab ntsa tuab ntsuas cov cuab yeej, lub tank txias, thiab tsis siv neeg txiav nrog pallet cov khoom siv rau cov yeeb nkab tsis sib haum los yog cua tshuab rau cov yeeb nkab hloov tau yooj yim. Cov kab tuaj yeem suav nrog cov cim cim, cov cuab yeej ntsuas, thiab lwm yam. Ib qho tseem ceeb yuav tsum tau ua kom txias lub extrudate es ceev ceev ze ntawm qhov tuag thaum tuav tswj qhov ntev thiab cov khoom.
Cov khoom siv tseem ceeb hauv cov dej ntws siv hauv cov yeeb nkab thiab profile extrusion
Piv txwv ntawm kev ua tiav cov yeeb nkab extrusion kab
calibration system rau extrusion
- Daim duab saum toj no qhia txog kev ntsuas qhov system rau cov yeeb nkab lossis lub raj extrusion kab.Lub sab laug sab laug qhia tau tias lub tshuab nqus tsev vacuum calibration nrog cascading, kub tswj dej da dej qhov twg (a) yog cov yeeb nkab tuag, (b) nqus nrog disks, (c) cascaded rhuab cheeb tsam dej da dej, thiab (d) kab ntsig tshem tawm rub. Sab saum toj txoj cai schematic qhia siab calibration siv lub ntsaws ntsaws nrog dej txau txias qhov twg (a) yog cov yeeb nkab tuag, 03) dej txias calibrator (Fig. 13.101, (c) dej txias txias, (d) kab ntsig tshem tawm rub, thiab (e) ntsaws ntsaws kom tuav lub siab sab hauv uas pab tswj cov kav dej OD thiab ID Qhov qis schematic qhia tau hais tias piv txwv ntawm qhov sib txawv ntawm qhov sib txawv rau cov kav dej hloov tau.
- Yog tias muaj qhov xav tau ntau lawm thiab cov extruder muaj peev xwm tsim tau, nws yog ib qho kev siv ntau qhov tuag, txhua qhov tuag tsim cov yeeb nkab uas feem ntau sib txawv.
Simplified schematic ntawm raj extrusion
Cov ntaub ntawv yas rau Extrusion
Qhov loj tshaj plaws thiab siv loj yog PVCs uas yuav luag ob npaug rau tom ntej uas yog HDPEs. Lwm tus, mus los ntawm qhov siab tshaj plaws mus rau qis qis, yog ABSs, PSs, TPEs, PCs, PPO / PPEs, PAs, ABS alloys, POMs, PBs, thiab PVDFs. CPVCs suav nrog hauv pawg PVC thiab XLPE hauv HDPEs.
Extrusion rau prosessing PVC
Hais txog PVC tebchaw, ib qho ntsia hlau extruder feem ntau siv daim ntawv granular tab sis tuaj yeem ua cov hmoov thiab flakes. Lub ntxaib ntsia hlau extruders feem ntau tuav cov hmoov. PVC qhuav sib tov tso cai rau lub processor coj kom zoo dua ntawm kev siv lawv tus kheej compounding formulations uas yuav tsum tau muab cov nqi zoo.
Extrusion rau prosessing HDPE
HDPE yog siv nyob rau hauv ntau yam kev siv, xws li cov pa roj thiab cov kav dej uas yuav tsum tau muaj zog txhua yam. Thaum ua tiav PE, nws yuav tsum tau ua haujlwm ntawm qhov qis tshaj qhov ua tau melting kub thaum tswj cov qib siab ntawm thermal-mechanical homogeneity hauv cov yaj.
Extrusion rau prosessing NYLON
Cov nylon dav dav yog extruded ntawm qhov kub ntawm qhov kub tsawg li sai tau los muab cov viscosity txaus thiab kom txo qis thermal degradation.Care yuav tsum tau coj los pib lub extruder nrog nws cov zis kawg ntawm qhov kub ntawm -4-10 degree ({{2 }} degree F) saum toj no nws melting point.
Extrusion rau prosessing TPUR
Lub toughness, saj zawg zog, thiab qis-temperature zog ntawm TI'poyurethanes (TPUR) elastomers ua rau lawv haum rau reinforced thiab unreinforced tubing thiab hose. Kev siv xws li lub teeb yuag hluav taws hose,
unreinforced tubing rau low-pressure pneumatic system, thiab lwm yam.
Thaum ua tiav TP polyester yas, kev tswj qhov kub thiab txias yog qhov tseem ceeb. Yog tias siab dhau lawm, nws tuaj yeem txo cov yaj lub zog loj heev.
Qhov tshwm sim yuav yog cov phab ntsa tsis xwm yeem. Qhov kub qis heev tuaj yeem ua rau lub raj tsis zoo, qhov ntev tsis sib xws, thiab cov kab vuam. Melt
thiab cov dej da dej kub yog qhov tseem ceeb tshaj plaws vim tias cov yas polyester yog cov khoom siv crystalline nrog qhov nqaim yaj-khov ntau.
Extrusion rau Ntxiv cov fillers
Fillers thiab reinforcements muab ib txoj hauv kev los hloov thiab txhim kho kev ua tau zoo ntawm cov yas thaum lub sij hawm ua thiab kev pabcuam. Tej zaum
Qhov tseem ceeb tshaj plaws yog vim li cas rau lawv siv kev txhawj xeeb txog kev txuag nyiaj hauv cov nqi ntawm cov khoom siv yas. Cov khoom siv nrov tshaj plaws siv yog calcium carbonate, talcum, barium sulfate, thiab ntoo hmoov av. Tus naj npawb ib hauv kev txhawb nqa ntxiv yog luv iav fibers 13, 431. Tsis tas li ntawd, ntxiv cov fillers thiab reinforcements rau cov khoom sib txawv TI muab cov txiaj ntsig zoo sib xws.
Cov yam ntxwv ua
Extrusion ntawm txheej txheem txoj kev
Feem ntau cov yeeb nkab yog tsim los ntawm kev ncaj qha los ntawm extrusion, nyob rau hauv-kab nrog cov kev taw qhia ntawm extrusion, tuag, sizing los yog calibrating ntaus ntawv los yog tank (Fig. 1.1), dej.
txias tank (Fig. 1.2), conveyor (Fig. 1.3), cutter, yog tias xav tau, thiab tshem tawm cov khoom siv thaum kawg ntawm kab.
Cov txheej txheem rau qhov loj ntawm cov yeeb nkab rau extrusion
Muaj cov txheej txheem sib txawv siv los tswj thiab ntsuas qhov loj ntawm cov yeeb nkab. Yeej, muaj qhov pub dawb feem ntau yog siv rau cov yeeb nkab me me / raj thiab lwm tus siv cov khoom siv sizing / tuag uas yog cov cuab yeej ntsuas ntsuas raws li cov ntsiab lus hauv Fig. 1. 4-1.5.
1.1 Piv txwv ntawm Gatto/Conair lub tshuab nqus tsev vacuum
1.2 Piv txwv ntawm Gatto / Conair cov dej thiab cov tso tsheb hlau luam .
Cov txheej txheem calibration yog feem ntau siv ua ke nrog cov dej ntws tawm / lub tank txias. Lub ntsiab kom zoo dua yog qhov tseem mos, moldable extruded profile yog kos los yog nias los ntawm lub tshuab nqus tsev thiab / los yog huab cua siab rau phab ntsa ntawm lub sizing / calibrating ntaus ntawv.
Nitrogen tuaj yeem siv los hloov huab cua. Nyob rau tib lub sijhawm, qhov kub yaj yog txias. Txawm hais tias siv txoj hauv kev, lub hom phiaj yog siv cov yas me me li sai tau, tsuas yog siv qhov xav tau.
1.3 Piv txwv ntawm Gatto/Cnair's take-away conveyor
1.4 Pipe Sizing
1.5 Sophisticated sizing systems
● Sizing Systems Rau Extrusion
Daim duab 1.5 qhia tau hais tias sib txawv sizing systems nrog: (a) nqus trough sizings/calibrations, siv calibrated disks; (b) nqus trough sizing / calibration, siv lub tes tsho perforated vaj tse; (c) sizing/calibrating system uas sib txuas cov dej tswj (kub thiab siab) nrog tswj lub tshuab nqus tsev; thiab (d) sizing /calibrating .cusing tsuas yog lub tshuab nqus tsev (cov duab profile tsis yog yeeb nkab).
Muaj cov qauv sib txawv ntawm daim hlau, disks, lossis lub tes tsho siv los muab cov sizing lossis calibration ntawm cov yeeb nkab. Cov phaj thiab / lossis disks tuaj yeem muab tso ua ke.
Txhua tus yuav tsum muaj cov tho qhov tseeb, feem ntau yog cov qhov sib txuas kom tau raws li cov yeeb nkab OD teeb tsa uas yuav tsum ua kom haum rau qhov sib piv. Cov qhov no feem ntau yuav ua kom loj dua los them rau qhov kawg shrinkage ntawm extrudate tom qab nws txias thiab tej zaum ntxiv shrinkage tom qab nyob rau hauv torage. Qhov sib nrug ntawm lawv muab qhov yooj yim smeans ntawm kev kho cov txheej txheem stacked kom tau raws li qhov sib piv. Nrog rau lub tes tsho system, raws li qhia nyob rau hauv Fig.1.5, txawv designs yog siv uas muaj peev xwm muaj xws li qhib kom tso cai rau cov dej thiab/los yog txawv huab cua siab nyob rau hauv kev sib cuag.
● Txiav tawm Chav Rau Extrusion
Lwm qhov tseem ceeb hauv txoj kab extrusion yog qhov kev txiav txim siab ntawm cov yeeb nkab thaum nws tsis mus nyob ib ncig ntawm lub pob tw. Yuav kom ua tau raws li cov kev cai sib txawv, txij li cov khoom yas cuam tshuam yuav ua li cas cov yeeb nkab yuav raug txiav, cov cutters sib txawv muaj nyob rau hauv kev mus nrog cov kab ceev thaum lub sij hawm txiav txiav. Tom qab txiav, Lawv sai sai rov qab mus rau lawv qhov chaw qub kom ua qhov txuas ntxiv nrog cov yeeb nkab.
Piv txwv li yog ib tug planetary tsau-length cutter
Txheej txheem Optimization rau Extrusion
Nws yog ib qho tseem ceeb uas qhov ntev ntawm qhov txias-calibrating system yog cor-rectly xaiv. Yog tias qhov ntev luv dhau thiab cov yeeb nkab extruded tseem mos, cov yeeb nkab yuav yooj yim deformed. Txawm li cas los xij, yog tias lub tshuab cua txias ntev dua qhov tsim nyog, kev sib txhuam ntawm cov yas thiab hlau nce thiab rub cov yeeb nkab los ntawm cov cuab yeej yuav nyuaj dua los yog ua rau txoj kab nres.
Qhov ntev ntawm lub tshuab cua txias lub trough los yog sizing unit yog txiav txim siab arbitrarily nyob rau hauv xyaum los yog raws li kev paub. Yog tias qhov txias txias tsis txaus, tus nqi ntawm cov dej yuav tsum tau ntws yuav tsum tau nce ntxiv (ntawm tus nqi). Yog tias ntev heev, dej yuav raug pov tseg.
Tuag Rau Extrusion
Cov yam ntxwv tseem ceeb ntawm kev tuag yog raws li hauv qab no: (1) lub extruder adapter thiab tuag yog tsim los rau lub hom phiaj rau ib tug smooth streamline yaj ntws; (2) lub mandrel tus txhawb nqa kab laug sab / webs yuav tsum yog tus sym-metrical (airfoil / streamline). puab) profile pib thiab xaus nrog ze ntawm riam npoo; (3) qhov chaw tuav ntawm kab laug sab yuav tsum raug txo kom tsawg; (4) qhov cross-sectionalarea ntawm cov kab laug sab txhawb nqa ntawm mandrel yuav tsum tsawg kawg peb zaug ntau dua li qhov chaw hla ntawm lub annulus / nplhaib; (5) txoj hauv kev mus kom ze rau qhov kawg (kwv yees) cov av sib npaug yuav tsum tau maj mam ua kom cov yaj compression thiab pab hauv vuam ua ke cov kwj deg tom qab dhau cov kab laug sab mandrel; (6) cov av tuag yuav tsum ntev txaus kom rov qab los ntawm cov yaj thiab pab tshem tawm cov kab weld; (7a) lub taub hau mandrel thiab lub dav hlau ntawm lub ntsej muag tuag yuav tsum nyob hauv kab; (7b) yog hais tias lub mandrel yog projecting los yog recessed, drag marks yuav pom tseeb nyob rau hauv lub bore ntawm lub extruded raj; (7c) rub cov cim yuav tsum raug zam vim tias ntau cov khoom yas muaj qhov tsis zoo; (8a) yuav tsum muaj cov kev cai rau kev thov huab cua los ntawm mandrel los yog alterna-tively lub tshuab nqus tsev chamber rau siv nrog sizing li; (8b) ib qho yooj yim nkag-sible qhov ntawm txog 6.4 hli (0.25in) nyob rau hauv txoj kab uas hla feem ntau yog txaus; (812) Thaum lub sij hawm ua tiav yuav tsum ceev faj kom lub qhov no huv si, nws tsis yog yuav tsum tau ntsaws ib nrab los yog tag nrho; thiab (9) cov tuag yuav tsum tau snug txaus los tiv thaiv to, tsis tau dawb txaus txav mus rau kev kho.
Daim ntawv thov rau Extrusion yeeb nkab kab
Muaj ntau ntau txoj kev sib txawv ntawm cov yeeb nkab thiab cov khoom siv hauv cov khoom siv hauv kev txav cov kua, gases, khib nyiab, thiab lwm yam. Lawv tuaj yeem ua kom zoo nkauj los muab kev kho kom zoo nkauj, kev txhawb nqa kev nyab xeeb, thiab lwm yam.
Round Dripper Inlet Irrigation Yeeb Nkab Extrusion Kab
