How do you calculate extruder screw channel depth?

For machined depth measured from the flight envelope, subtract root diameter from flight outside diameter and divide by two at the same section. If a flow model measures from the barrel wall, its channel height also includes radial clearance. Confirm the reference surfaces before comparing values.

Is channel depth the same as screw-to-barrel clearance?

No. Machined channel depth describes the screw profile between its root and flight envelope. Running clearance describes the gap between flight tips and the barrel. A larger barrel bore can increase clearance without changing the machined depth of the screw. Record both dimensions separately.

Does a deeper metering channel always increase output?

No. Depth influences both drag flow and pressure-driven flow. Under an opposing pressure gradient, part of the ideal delivery is offset. Material behavior, metering length, temperature and die resistance also matter. More geometric space is not proof of more output meeting the product requirements.

Can shallower channels increase melt temperature?

They can change shear and thermal conditions, but depth alone does not determine the final temperature. Compare actual melt measurements, output and drive load under defined conditions. A local shear-rate estimate or barrel setpoint cannot establish the complete temperature history of the material.

Is there one recommended channel depth for PE or PP?

No single value describes every PE or PP application. Specify feed state, resin grade, feeding arrangement, melting duty, discharge pressure and required output. Review a dimensioned profile with the matching barrel and drive. A depth quoted for a published case is not a universal material specification.

Can I machine an existing screw deeper to increase production?

Do not authorize that change from an output target alone. Check the remaining root section, working surface, complete geometry, matching barrel and drive requirements. First determine whether depth is actually limiting the process. Correcting feeding, wear or an upstream restriction may be the appropriate action instead.

Extruder Ntsia Hlau Channel Qhov tob: Cov zis, Siab & Melt Zoo

Cais cov ntsia hlau lub machined channel qhov tob los ntawm kev khiav clearance thiab ntws-channel qhov siab siv nyob rau hauv ib tug xam.
Cov khoom noj khoom haus, kev hloov pauv thiab ntsuas ntsuas muaj cov haujlwm sib txawv. Ib txoj cai tob tsis tuaj yeem piav qhia txhua ntu.
Nyob rau hauv ib qho kev tawm tsam siab gradient, lub siab ntws txo qhov kev xa khoom muaj los ntawm kev sib hloov ntawm cov ntsia hlau.
Txheeb xyuas cov dej ntws tawm, yaj thiab hnav ua ntej hloov qhov ntsuas qhov profile.
Sib piv tau txais cov zis, yaj qhov kub thiab lub zog tsav ua ke thaum txiav txim siab kho qhov tsim.

Dab tsi yog channel qhov tob hauv cov yas extruder ntsia hlau?

Rau ib qho kev kos duab kos duab, txhais cov tshuab qhov tob raws li qhov kev ncua deb ntawm lub hauv paus mus rau lub davhlau sab nraum lub hnab ntawv. Yog D_oyog qhov dav dav dav thiab D_ryog lub hauv paus txoj kab uas hla ntawm tib seem, qhov tob yog ib nrab ntawm lawv qhov sib txawv. Tag nrho txoj kab uas hla txawv tsis yog qhov tob channel.

Machined ntsia hlau qhov tob: H_s= (D_o-D_r) /2

Radial khiav clearance:c= (D_b-D_o) /2

Barrel-rau-hauv paus qhov siab:h= (D_b-D_r) / 2 = H_s+ c

D_byog qhov sib npaug ntawm lub thoob. Cov kev sib raug zoo no piav txog cov kab lus sib thooj.

Nyeem cov ntaub ntawv saum npoo ua ntej siv tus nqi tob

Tus qauv ntws tuaj yeem txhais qhov tob ntawm lub thoob phab ntsa es tsis yog lub hnab ntawv ya davhlau. CovPenn State ib leeg-ntsia hlau extrusion sau ntawvsiv lub thoob-rau-hauv paus geometry. Ntawm no peb hu qhov siab h, thaum H_stxheeb xyuas qhov machined ntsia hlau dimension. Tus neeg muag khoom daim duab yuav siv cov ntawv sib txawv; cov ntaub ntawv hais txog qhov chaw tseem ceeb tshaj qhov cim.

Qhia seb qhov tob yog ntsuas los ntawm lub hnab ntawv lub davhlau los yog lub thoob phom. Tsis txhob ua ntsiag to hloov ib qho rau lwm tus hauv kev kos duab lossis kev suav.

Rau ib qho piv txwv suav, xav tias D_o= 65.0mm, D_r= 57.0mm thiab D_b= 65.2 mm. H_syog 4.0 hli, c yog 0.1 hli thiab h yog 4.1 hli. Cov kev xav tau no piav qhia cov ntsiab lus; lawv tsis lees txais qhov tseem ceeb rau Nanhaiya ntsia hlau.

Sau qhov chaw axial thiab ntsuas qhov xwm txheej nrog rau txhua tus nqi. Ib qho piv txwv ntawm H / D yog qhov muaj txiaj ntsig tsuas yog thaum ob qhov loj me siv cov lus pom zoo. Nws tsis tuaj yeem tsim muaj peev xwm lossis lub peev xwm siab ntawm nws tus kheej. Pebparameter-matching kev pabcuamsuav nrog groove qhov tob, txoj kab uas hla thiab L / D vim tias txhua qhov peb xav tau los tshuaj xyuas qhov profile.

Yog vim li cas pub, kev hloov pauv thiab ntsuas ntu xav tau cov channel sib txawv

Ib tug pa ntsia hlau tau txais tej khoom khib nyiab, tsim ib txoj kev melting thiab xa yaj mus rau qhov tuag. Qhov profile yuav tsum haum rau cov khoom nkag mus rau txhua ntu. Siv txoj cai metering-channel rau cov khoom noj tsis muaj qhov hloov pauv hauv lub luag haujlwm.

Txheeb xyuas txhua ntu los ntawm nws txoj haujlwm, tsis yog nws qhov tob xwb
Tshooj	Lub luag haujlwm tseem ceeb	Dab tsi daim duab yuav tsum piav qhia	Zam qhov shortcut no
Pub	Txais thiab xa cov khoom loj	Qhov tob, pub qhib thiab sib txuam pub-khoom npaj	Muaj ntau qhov ntim ib txwm txhais tau tias kev noj ntau dua
Kev hloov pauv	Muab cov geometry rau kev sib tw melting	Hauv paus profile, kev hloov pauv ntev thiab txhua yam teeb meem cuam tshuam	Ib tug compression ratio kiag li txhais tau tias melting
Kev ntsuas ntsuas	Nqa yaj nyob rau hauv lub siab xav tau	Qhov tob, txhuas, qhov dav thiab qhov ntev nrog cov khoom qis qis	Ib tug ntxaum channel ib txwm xa ntau dua tawm tsam tus tuag

Match feed channel qhov tob rau lub extruder feed chim

PebPE / PP high-speed configurationsuav nrog ib qho tshwj xeeb pub-qhov thoob. Qhov ntawd ua rau kev npaj lub thoob ib feem ntawm kev xaiv, tsis yog tom qab. Peb yuav thov cov ntsiab lus pub-section ua ntej thov kev paub los ntawm cov kab sib txawv, du-chim.

Particle daim ntawv thiab cov khoom sib xws kuj muaj nyob rau hauv qhov kev tshuaj xyuas ntawd. Ib txoj kab sib sib zog nqus tsis tuaj yeem txais cov khoom siv uas tsis tuaj yeem ncav cuag nws. Hloov pauv, nce kev noj haus tsis muaj txiaj ntsig yog tias qhov profile hauv qab tsis tuaj yeem ua tiav cov haujlwm melting yuav tsum tau ntawm tus nqi ntawd.

Cov ntsia hlau tshwj xeeb xav tau lawv tus kheej txhais lus. Cov ntu barrier muaj cais cov khib nyiab thiab yaj txoj kev; vented profile muaj xws li decompression. Cov channel tsis tas yuav dhau los ua ntiav ntiav thoob plaws hauv lub tshuab tag nrho. Pebbarrier, pa thiab sib xyaw ntsia hlau sib pivpiav qhia qhov txawv ntawm cov qauv no. Siv qhov profile tiag tiag thaum nrhiav tus ciam teb ntawm kev pub mis, melting thiab twj.

Puas yog qhov sib sib zog nqus metering channel ib txwm ua kom cov zis extruder?

Tsis yog. Ntau qhov chaw channel tuaj yeem ua rau qhov zoo tshaj plaws rub-khiav pab, tab sis lub zog-driven flow tuaj yeem tawm tsam qhov kev xa khoom. Cov txiaj ntsig tau nyob ntawm qhov chaw ua haujlwm. Qhov no yog vim li cas peb thiaj li tsis pom zoo kom sib sib zog nqus metering channel los ntawm kev sib piv ntim ib leeg.

Drag flow tsuas yog ib feem ntawm cov zis tawm

CovPenn State kho cov ntsia hlau thiab tuag yam ntxwvcais cov ntws uas tau tsav los ntawm cov txheeb ze phab ntsa txav los ntawm cov ntws uas tau tsav los ntawm lub siab gradient. Rau ib qho channel uas ua kom muaj siab rau lub qhov hluav taws xob, qhov kev txhawb nqa siab tawm tsam qhov kev npaj xa khoom.

Simplified puv-channel kev sib raug zoo: Q_net= Q_luag-Q_{tawm tsam siab}

Nyob rau hauv ib lub voj voog dav, khov kho, isothermal Newtonian approximation:

Q_luag= W U_zh / 2

Q_{tawm tsam siab}= W h³ ΔP / (12 μ ℓ), rau qhov hluav taws xob qhia qhov siab nce ΔP > 0.

W yog channel dav; U_zyog txheeb ze phab ntsa tshaj tawm raws cov channel; μ yog viscosity; ℓ yog kev ncua deb ntawm cov qauv channel, tsis yog cov ntsia hlau tag nrho axial ntev.

Ntawm no Q txhais tau hais tias volumetric channel ntws, tsis yog cov zis loj. Nyob ruaj ruaj, phab ntsa ceev, viscosity, siab nce thiab channel ntev, lub sij hawm rub yog linear hauv h thaum lub sij hawm tawm tsam-siab muaj h³. Lub sij hawm cubic tsis ua tag nrho throughput proportional rau qhov tob cubed. Nce qhov tob hloov ob nqe lus.

Daim duab qhia pom qhov kos npe ntawm kev koom tes rau lub siab-tsim channel. Qhov sib txawv siab-gradient kev taw qhia hloov lub siab-flow contribution.

Cov ntsia hlau thiab tuag qhia qhov chaw ua haujlwm

Kev suav ntau lawm kuj xav tau cov resin tus cwj pwm ntws, qhov kub thiab txias tsis kam. Finite channel dav, shear thinning, to, melting thiab ib nrab filling tuaj yeem ua rau cov lus qhia yooj yim tsis txaus. Nws txoj hauj lwm ntawm no yog piav qhia txog kev lag luam tawm, tsis yog kwv yees ib qho kev lees paub kg / h daim duab.

Rau kev yuav khoom, thov qhov xav tias tuag siab, viscosity hauv paus thiab ntsuas qhov ntev nrog rau qhov kev kwv yees tawm. Yog tias cov xwm txheej ntawd tsis tuaj lawm, tus lej loj dua channel-ntim tsis muaj pov thawj txaus los nyiam lub hau ntswj.

Qhov sib sib zog nqus vs qhov dej ntiav: yuav ua li cas rau melting thiab yaj kub?

Cov kab qis qis tsis tau txias dua, thiab cov kab sib sib zog nqus tsis tuaj yeem kub dua. Kev hloov pauv geometry cuam tshuam rau kev ntws, lub zog nkag thiab hloov hluav taws xob ua ke. Cais ib cheeb tsam shear-rate kwv yees los ntawm qhov kub ntawm cov khoom tawm hauv extruder.

Cov lus nug tshwm sim los ntawm kev hloov qhov tob
Thov hloov	Muaj peev xwm pab tau	Dab tsi yuav tsum tau kuaj xyuas
Suab kho siab channel	Tej zaum yuav txo tau qhov kev tawm tsam-siab-khiav kev pab cuam hauv cov qauv siv yooj yim	Muaj peev xwm channel, shear, qhov tseeb melt kub thiab load
ntxaum channel	Muab qhov chaw ntau dua thiab qhov loj dua qhov zoo tagnrho rub-ntws nrog rau lwm cov ntsiab lus kho	Siab rhiab heev, melting luag hauj lwm, hauv paus qhov ntev thiab tsav muaj peev xwm

Qhov yooj yim tshaj tawm-rau-qhov siab piv U / h muab qhov ntsuas tus nqi qis, tsis yog ua tiav qhov kev kwv yees thermal. Yog tias cov khoom xa tuaj tsis zoo, qhov ntsuas kub tuaj yeem txawv ntawm qhov qis nominal shear-rate kwv yees qhia. Peb yuav sib piv ntsuas qhov ntsuas kub thiab lees txais cov zis ntau dua li daim ntawv lo rau ib qhov tob ntawm qhov sib txawv.

chim, ntsia hlau-hauv paus thiab yaj kub yog txawv cov cim

HauvMark A. Spalding txoj kev tshawb nrhiav qhov kub thiab txias, cov kws tshawb fawb tau ntsuas lub ntsuas ntsuas nrog 17 RTDs. Qhov kev sim piav qhia yog vim li cas qhov ntsuas kub ntawm lub hauv paus tsis tuaj yeem hloov tau los ntawm lub thoob ntim. Nws cov khoom siv, ntsuas txoj haujlwm thiab kev ua haujlwm ua ntu zus yog ib feem ntawm qhov tshwm sim.

Rau kev tshuaj xyuas ntau lawm, sau dab tsi txhua lub ntsuas ntsuas ntsuas thiab qhov twg nws zaum. Khaws qhov chaw ntawm lub thoob, nyeem cov cheeb tsam tiag tiag thiab ntsuas qhov ntsuas kub sib cais. Ib qho kev nyeem ntawv cais tawm tsis tuaj yeem rov tsim kho txhua qhov chaw thermal nyob hauv cov ntsia hlau.

Pebpob tshab-granulation tsimcombines geometry nrog qis rotational speeds thiab me me shear. Peb yuav soj ntsuam qhov kev kho qhov tob ntawm lub hom phiaj ntawm lub hom phiaj ntawm kev ua haujlwm, tsis pom zoo los ntawm ib qho kev nyeem ntawv kub.

Yuav ua li cas channel qhov tob ua haujlwm nrog compression piv, L / D thiab ntsia hlau txhuas

Ib tug ntsia hlau specification xav tau ib tug dimensioned profile. Nominal txoj kab uas hla, L / D thiab compression piv tuaj yeem pab txheeb xyuas tus qauv tsim, tab sis lawv tso cov kev xaiv tseem ceeb tsis tau daws. Peb qhov kev txhawj xeeb thawj zaug yog seb ob nqe lus piav qhia tib lub geometry ua ntej peb sib piv lawv cov lus thov.

Channel qhov tob vs. extrusion ntsia hlau compression piv

Rau cov pa sib npaug ntawm cov hlau lead geometry, qhov pub-rau-metering qhov tob piv yog ib qho kev nthuav qhia compression-piv. Nws tsis qhia qhov tob tob. Khaws ob qhov tob rau ntawm daim duab. Tsis txhob xav tias qhov sib piv ntawm qhov sib piv kuj tseem cuam tshuam cov ntim channel lossis tus cwj pwm siab-khiav tau piav qhia saum toj no.

L / D nyob rau lwm qhov ntev: ua haujlwm ntev piv rau nominal txoj kab uas hla. Qhov ntev muab rau melting thiab metering tseem yuav tsum tau qhia. Lub ntsia hlau ntev dua tsis txheeb xyuas qhov twg hloov pauv, thaum qhov tsis hloov tag nrho ntev tuaj yeem muaj qhov hloov kho cov hauv paus profile.

Lead, suab thiab dav dav dav hloov qhov sib piv

Txheeb xyuas tus lej thiab tus lej pib. Lead yog lub axial ua ntej ntawm ib lub helix nyob rau hauv ib tug ua tiav tig; nyob ib sab-flight pitch tsis tas yuav tsum yog tib qhov loj me ntawm ntau qhov pib ntsia hlau. Channel dav kuj xav tau kev ntsuas kev taw qhia. CovSPE metering-channel tsom xamtxheeb xyuas geometry tshaj qhov tob raws li qhov tsim nyog suav cov tswv yim.

Rau kev kho dua tshiab, peb yuav kos cov kev hloov pauv rau qhov tob, txhuas, dav hlau dav hlau thiab ntu ntev sib cais. Qhov ntawd tiv thaiv kev rov tsim dua tshiab los ntawm kev muag khoom raws li kev txhim kho ib leeg.

Hauv paus qhov ntev thiab cov txheej txheem kho saum npoo av kuj muaj nyob rau hauv kev tshuaj xyuas engineering. Tsis txhob tso cai rau machining ib tug uas twb muaj lawm ntsia hlau ntxaum yam tsis tau kuaj xyuas seem seem, ua hauj lwm nto, tsav yuav tsum tau thiab sib thooj chim. Ib qho profile uas haum rau lub hnab ntawv tseem yuav tsum tau ua kom haum rau cov khoom siv thiab lub luag haujlwm.

Xaiv qhov tob channel rau zaj duab xis, kev kub ceev extrusion thiab granulation

Peb yuav pib xaiv daim ntawv thov nrog lub xeev pub thiab kev ua haujlwm. Ib zaj duab xis ntsia hlau txais pellets muaj ib txoj hauj lwm sib txawv los ntawm cov ntsia hlau tawm uas tau txais cov khoom uas twb yaj lawm. Tsis yog yuav tsum tau txais kev pom zoo kom tob tob vim tias ob qho tib si txheej txheem polyethylene.

Siv daim ntawv thov los txhais qhov kev tshuaj xyuas, tsis yog universal depth table
Daim ntawv thov	Cov ntaub ntawv pov thawj tsim nyog	Cov ntaub ntawv xav tau rau kev tshuaj xyuas qhov tob
LDPE / HDPE zaj duab xis	Peb qhov ntau yam suav nrog kev xaiv raws li kev xaiv thiab yuam kev pub mis	Resin thiab pub daim ntawv, zaj duab xis-zoo cov txheej txheem, tam sim no profile thiab lub hom phiaj zoo tso zis
PE / PP kev kub ceev extrusion	Peb cov khoom sib txuas cov qauv ntsia hlau, tshwj xeeb pub-slot chim thiab tsav tsim	Cov ntsiab lus pub-khob, melting thov, siab, tiag tiag ceev thiab pom zoo tsav txwv
Pob tshab granulation	Cov yam ntxwv tshwj xeeb ntawm daim ntawv thov suav nrog L / D ntev dua, qis dua, me me shear thiab du kev hloov	Resin, thermal thiab pom kev xav tau, flow-path geometry thiab kev khiav hauj lwm ntau yam
Melt-fed paug ntsia hlau	Cov khoom tuaj yog twb molten; cov twj tso kua mis thiab thermal txwv yuav tsum tau muaj kev soj ntsuam cais	Pub tus nqi thiab kub, viscosity, tso tawm siab thiab ntsuas geometry

Nanhaiya LDPE and HDPE film single-screw product photograph — Peb zaj duab xis-ntsia hlau ntau yam. Kev xaiv yuav tsum tau pub thiab ntsuas qhov ntev ntawm daim duab, tsis yog qhov tob kwv yees los ntawm daim duab.

Nanhaiya transparent granulation screws and barrels — Daim ntawv thov pob tshab-granulation hu rau kev tshuaj xyuas ua ke ntawm qhov profile, kev hloov pauv thiab lub luag haujlwm thermal.

Peb cov yeeb yaj kiab teev L / D xaiv 25: 1, 28: 1, 30: 1, 33: 1 thiab 35: 1. Cov kev xaiv no muab cov kev xaiv ntev, tsis yog ib qho kev ntsuas qhov tob rau txhua qhov resin. Ib tus neeg muag khoom tseem xav tau qhov profile channel tiag tiag thiab kev ua haujlwm yuav tsum tau ua.

Cov ntaub ntawv pob tshab-granulation ntau lawm kuj piav qhia txog kev sib koom tes tsim qauv. Peb yuav tsis tig ib lub rooj ntaub ntawv dav dav rau hauv qhov tob tob uas yuav tsum tau muaj rau txhua qhov kev tsim pob tshab. Nug rau daim duab qhia thiab qhov laj thawj rau nws qhov kev xaiv qhov tob.

Thaum sib piv extruder screws thiab chim, cov lus nug tseem ceeb yog seb qhov kev sib txuas lus tau hais txog koj cov khoom thiab lub tshuab. Ib daim ntawv lo PE lossis PP tsis tuaj yeem daws cov lus nug ntawd.

Extruder ntsia hlau coj teeb meem los yog channel-qhov tob mismatch?

Kev hloov pauv hloov zuj zus thiab qhov kev txwv tam sim no los ntawm kev ua haujlwm tsim nyog tau txais kev tshawb nrhiav sib txawv. Tsis yog pov thawj qhov laj thawj ntawm nws tus kheej. Sib piv lub luag haujlwm tseem ceeb, cov ntaub ntawv ua haujlwm tam sim no thiab cov khoom siv tiag tiag ua ntej hloov kho cov channel profile.

Sib cais cov hauv paus hnav, ya davhlau-ntsuab hnav thiab chim hnav

Geometric teebmeem nrog rau lwm cov diameters tuav tsis hloov
Kev hloov pauv tau pom	Machined-depth kev sib raug zoo Hs	Radial-clearance kev sib raug zoo c
Hauv paus txoj kab uas hla txo	Nce	Tsis hloov
Davhlau sab nraud txoj kab uas hla txo	Txo qis	Nce
Barrel bore nce	Tsis hloov	Nce

Cov no yog qhov tshwm sim ntawm qhov ntsuas qhov ntev, tsis yog qhov kev twv ua ntej uas hnav tshwm sim ntawm ib qho chaw. Qhov tiag tiag tuaj yeem muaj ntau qhov kev hloov pauv ua ke. Sau cov chaw nres tsheb sib txuas thiab kev taw qhia; tsis txhob txo qhov hnav tsis sib xws rau ib qho nruab nrab qhov tob.

PebDaim ntawv qhia kev ntsuas lub taub hau thiab lub thoobpiav qhia txog cov ntsia hlau sib txuas thiab cov ntaub ntawv bore. Siv daim duab pom zoo raws li tus qauv siv siv. Ib qho piv txwv hnav qhia txog qhov seem geometry, tsis tas cov geometry uas yuav tsum tau tsim tom ntej.

Tshawb xyuas cov kev txwv saum toj kawg nkaus ua ntej ua kom cov channel tob

Nug seb cov khoom puas ncav cuag qhov ntsuas qhov ntsuas hauv qhov kev xav tau thiab ntawm tus nqi npaj. Kev ntsuas dej ntws qis tsis tuaj yeem, los ntawm nws tus kheej, ua pov thawj tias kev pub mis thiab melting txaus. Cov yeeb yaj kiab-kab yeeb yaj kiab uas tau tshaj tawm hauv qab no qhia tau hais tias qhov kev txwv ntawm cov dej ntws tuaj yeem tsim cov tsos mob qis qis.

Tsis txhob kho txhua lub cheeb tsam uas yog qhov ua txhaum. Kev txiav txim siab tshaib plab noj mov thiab vented seem muaj cov qauv tsim sib txawv los ntawm ib cheeb tsam uas tsim los ua haujlwm puv thiab siab. Qhia qhov kev npaj uas koj tab tom ntsuam xyuas ua ntej txhais cov kev ntsuas.

Peb yuav cais peb qhov kev txiav txim siab: rov qab kho cov ntaub ntawv hnav, hloov geometry rau lub luag haujlwm kho dua tshiab, lossis kho lwm qhov kev txwv. Kev txiav txim ib lub ntsia hlau sib txawv ua ntej ua qhov sib txawv tuaj yeem tawm qhov teeb meem ntau lawm tsis daws.

Qhov kev tshaj tawm zaj duab xis-kab project qhia txog qhov tob ntawm channel

Yog vim li cas peb yuav xyuas qhov barrier nkag ua ntej hloov metering qhov tob

Ib zaj duab xis-kab ntaub ntawv sau los ntawm Mark A. Spalding nyob rau hauvSPE Extrusion Division technical paperqhia tias yog vim li cas peb thiaj li tshawb xyuas qhov kev txwv ntawm cov dej ntws ua ntej hloov qhov ntsuas qhov tob.

LDPE kab siv 88.9 hli ntsia hlau nrog 33: 1 L / D thiab 5.8 hli metering-channel qhov tob. Nws tsim 148 kg / h ntawm 91 rpm, nrog rau qhov kub thiab txias ntawm 232 ° C. Intermittent gel thiab carbon contamination tsim thaum lub sijhawm ua haujlwm.

Kev suav thiab kev kuaj xyuas polymer-solidification tau pom muaj kev txwv ntawm kev nkag mus rau hauv qhov barrier-section. Qhov chaw ntawm cov dej ntws qis qis tsuas yog ib feem puv nkaus xwb, thiab cov khoom siv tsis zoo degraded. Qhov teeb meem tsis tau daws los ntawm tsuas yog muab ntau dua metering-channel ntim.

Tom qab qhov kev thaiv nkag tau raug hloov kho, cov kab tswj tau 148 kg / h ntawm 69 rpm. Extrudate kub poob mus rau 223 ° C, thiab cov zis tshwj xeeb tau nce los ntawm 1.63 txog 2.14 kg / (h·rpm), kwv yees li 30%. Daim ntawv tshaj tawm tsis muaj gel da dej ntxiv tom qab kev hloov kho.

Peb qhov kev txiav txim siab los ntawm qhov project no yuav yog los xyuas seb qhov twg mus txog qhov ntsuas qhov ntsuas ua ntej hloov kho nws qhov tob. Rau qhov kev sib piv zaj duab xis-ntsia hlau nug, peb yuav thov kom muaj kev cuam tshuam-kev nkag geometry thiab cov ntaub ntawv khiav hauj lwm ib sab ntawm qhov ntev channel. Qhov txiaj ntsig zoo ntawm no yog tib tus nqi ntau lawm ntawm qhov qis qis thiab qhov kub thiab txias, tsis yog 30% nce hauv cov zis ib teev.

Cov lus qhia hloov pauv tau yog qhov kev kuaj mob ua ntu zus. Qhov luam tawm 5.8 hli qhov tob yog ib feem ntawm qhov project piav qhia, tsis yog qhov pom zoo qhov tob rau lwm lub tshuab lossis Nanhaiya cov khoom specification.

Dab tsi ntawm extruder daim duab yuav tsum qhia ua ntej hloov channel qhov tob

Yuav ua li cas peb yuav tshuaj xyuas qhov kev thov rau cov ntsia hlau sib sib zog nqus

Yog tias cov kab yeeb yaj kiab xav tau ntau qhov tso zis, peb yuav tsis pom zoo cov ntsia hlau sib sib zog nqus los ntawm qhov yuav tsum tau ua ib leeg. Peb thawj lo lus nug yuav yog seb qhov kev txwv uas twb muaj lawm yog cov khoom siv, tsis tiav melting los yog siab tsim. Cov teeb meem no tuaj yeem zoo sib xws ntawm qhov tso tawm kawg tab sis yuav tsum muaj kev hloov pauv txawv.

Peb yuav sib piv qhov kev pom zoo kos duab nrog kev ntsuas los ntawm cov ntsia hlau uas twb muaj lawm thiab cov khoom sib txuam. Hauv paus txoj kab uas hla, ya tawm sab nraud txoj kab uas hla thiab chim bore yog nyob rau hauv cais txhua. Ib lub thoob hnav tsub kom khiav clearance; nws tsis cia li nce channel qhov tob machined rau hauv cov ntsia hlau. Luam ib lub rooj sib txoos hnav tsis tau txheeb xyuas qhov sib txawv no tuaj yeem khaws qhov teeb meem qub.

Tom ntej no, peb yuav tshuaj xyuas cov ntaub ntawv kev khiav hauj lwm: qib resin, cov ntsiab lus siv dua tshiab, ntsia hlau ceev, txais cov zis, yaj kub, siab thiab tsav load. Ib daim duab siab tshaj plaws-tso zis yuav tsis pom qhov hloov pauv geometry. Peb yuav tsum nkag siab txog cov xwm txheej hauv qab no uas cov kab poob zoo lossis tsis tau txais txiaj ntsig zoo.

PebPE / PP high-speed ntsia hlau tsimmuab cov ntsia hlau geometry nrog rau qhov tshwj xeeb pub-slot chim thiab kev sib tw tsav kev sib tw. Peb yuav tshuaj xyuas cov yam ntxwv no ua ke. Kev ua kom qis qis qis qis tuaj yeem tsis tuaj yeem them nyiaj rau cov khoom siv uas ntu pub mis tsis tuaj yeem xa tuaj.

Raupob tshab granulation, peb cov qauv luam tawm ua ke ntev L / D nrog qis kev sib hloov ceev, me me shear thiab du kev hloov. Peb yuav khaws cia lub hom phiaj ua tiav thaum saib cov channel qhov tob, tsis yog xaiv qhov profile ntxaum vim nws muaj ntau qhov chaw.

Ua ntej tsim khoom, peb yuav kos txhua qhov chaw khaws cia thiab kho dua tshiab, tshawb xyuas cov tsav tsheb thiab kev teeb tsa kev txwv, thiab pom zoo rau kev lees txais ntau lawm. Lub tswv yim yuav tsum piav qhia txog qhov tshiab channel profile hloov pauv thiab qhov kev hloov ntawd yuav raug txiav txim li cas. Yog tias cov ntaub ntawv pov thawj qhia txog kev noj zaub mov, hnav lossis kev txwv qis qis, peb yuav hais txog qhov teeb meem no ua ntej pom zoo rau cov ntsia hlau sib txawv.

Welding torch working on a screw component in a Nanhaiya product photograph — Screw nto ua, qhia ntawm peb PE / PP high-ceev khoom nplooj ntawv. Geometry thiab kev ua haujlwm-nto yuav tsum nyob hauv tib daim duab pom zoo.

Kev tshuaj xyuas rau-kauj ruam channel-qhov tob

Txhais cov khoom tuaj thiab lub luag haujlwm.Txheeb xyuas cov khoom noj los yog yaj, qib resin, additives, cov qauv khoom thiab lub hom phiaj tau txais cov txiaj ntsig.
Txheeb xyuas qhov geometry tam sim no.Muab cov davhlau ya nyob twg thiab cov hauv paus hniav diameters, qhov tob cov ntaub ntawv, cheeb tsam lengths, lead, pib, dav dav dav thiab qhov sib piv thoob qhov ntev.
Tsim lub hauv paus kev ua haujlwm.Cov ntaub ntawv ceev, cov zis zoo, siab, ntsuas qhov kub thiab txias, tsav thauj khoom thiab cov khoom siv zoo siv txoj hauv kev zoo ib yam.
Txheeb xyuas txoj haujlwm txwv.Sib piv kev pub mis, yaj, tso dej thiab kev txwv qis ua ntej xaiv qhov hloov kho profile.
Xyuas kom tiav lub rooj sib txoos.Txheeb xyuas qhov hnav, qhov seem hauv paus qhov ntev, qhov chaw ua haujlwm, txwv tsis pub tsav, kev cuam tshuam thiab kev teeb tsa.
Pom zoo rau kev lees txais.Qhia meej qhov kev tshuaj ntsuam xyuas thiab kev tsim khoom-kev sib piv, suav nrog cov khoom zoo thiab cov phiaj xwm kev ua haujlwm.

Cov lus pom zoo yuav tsum paub qhov txawv ntawm qhov kev kho dua tshiab ntawm qhov qub geometry los ntawm kev tsim kho dua tshiab. Kos qhov loj me uas tsis hloov pauv thiab piav qhia lub hom phiaj ua tiav ntawm txhua qhov kev hloov kho. Qhov ntawd muab kev yuav khoom thiab tsim khoom tib lub hauv paus rau kev pom zoo.

Xa cov duab kos nrog qhov yuav tsum tau ua

Zhoushan Nanhaiya Yas Machinery Co., Ltd. muab kev cai ntsia hlau tsim thiab tsim. Pebkev pabcuamsib tw groove qhov tob thiab lwm yam kev qhia tshwj xeeb rau cov khoom siv, khoom siv thiab lub peev xwm xav tau.

Xa cov ntsia hlau thiab lub thoob kos duab, cov ntaub ntawv cov ntaub ntawv, hnav cov ntaub ntawv thiab cov ntaub ntawv kev khiav hauj lwm kom peb tuaj yeem tshuaj xyuas qhov kev hloov pauv.

Sib tham txog koj qhov project screw-and-barrel

Email:info@nhyscrew.com ib
Xov tooj:+86 135 0580 9643

Cov lus nug nquag nug txog extruder ntsia hlau channel qhov tob

Yuav ua li cas koj xam extruder ntsia hlau channel qhov tob?

Rau machined qhov tob ntsuas los ntawm lub davhlau ya nyob twg lub hnab ntawv, rho tawm hauv paus txoj kab uas hla ntawm lub davhlau sab nraud txoj kab uas hla thiab faib los ntawm ob ntawm tib seem. Yog hais tias tus qauv ntws ntsuas los ntawm lub chim phab ntsa, nws qhov siab channel kuj suav nrog radial clearance. Txheeb xyuas qhov chaw siv ua ntej sib piv cov nqi.

Puas yog channel qhov tob zoo ib yam li cov ntsia hlau-rau- chim tshem tawm?

Tsis yog. Machined channel qhov tob piav qhia txog cov ntsia hlau profile ntawm nws lub hauv paus thiab lub hnab ntawv davhlau. Khiav clearance piav txog qhov sib txawv ntawm cov lus qhia dav hlau thiab lub thoob. Ib lub thoob loj dua tuaj yeem ua kom tshem tawm yam tsis tau hloov lub tshuab qhov tob ntawm cov ntsia hlau. Sau ob qhov loj me sib cais.

Puas yog qhov sib sib zog nqus metering channel ib txwm nce cov zis?

Tsis yog. Qhov tob cuam tshuam rau ob qho tib si rub ntws thiab lub zog-driven flow. Nyob rau hauv qhov kev tawm tsam siab gradient, ib feem ntawm qhov kev xa khoom zoo tshaj yog offset. Cov khoom coj tus cwj pwm, ntsuas qhov ntev, qhov kub thiab txias kuj tseem ceeb. Ntau qhov chaw geometric tsis yog pov thawj ntawm ntau cov khoom tsim tau raws li cov khoom xav tau.

Cov dej ntiav dej puas tuaj yeem ua kom kub kub?

Lawv tuaj yeem hloov shear thiab thermal tej yam kev mob, tab sis qhov tob ib leeg tsis txiav txim siab qhov ntsuas kub kawg. Sib piv qhov tseeb melt ntsuas, tso zis thiab tsav load raws li tau teev tseg. Ib qho kev kwv yees hauv zos shear-rate los yog chim setpoint tsis tuaj yeem tsim kom tiav qhov kub thiab txias keeb kwm ntawm cov khoom.

Puas muaj ib qho kev pom zoo channel qhov tob rau PE lossis PP?

Tsis muaj ib qho nqi piav qhia txhua daim ntawv thov PE lossis PP. Qhia meej lub xeev pub, qib resin, kev npaj pub noj, lub luag haujlwm melting, tso tawm siab thiab cov khoom tsim tawm. Txheeb xyuas qhov profile me me nrog rau qhov sib txuam lub thoob thiab tsav. Ib qhov tob uas tau hais rau cov ntaub ntawv luam tawm tsis yog cov khoom siv dav dav.

Kuv puas tuaj yeem siv cov ntsia hlau uas twb muaj lawm kom ua kom ntau lawm?

Tsis txhob tso cai qhov kev hloov pauv ntawm lub hom phiaj tso zis ib leeg. Txheeb xyuas qhov seem hauv paus, ua haujlwm saum npoo, ua tiav geometry, sib piv cov thoob thiab cov kev xav tau tsav. Ua ntej txiav txim siab seb qhov tob puas yog qhov txwv qhov txheej txheem. Kev kho kev pub mis, hnav lossis kev txwv qis qis yuav yog qhov kev txiav txim tsim nyog.