- A 3: 1 piv tsis qhia koj seb cov channel yog 9 thiab 3 mm tob lossis 12 thiab 4 mm tob.
- L/D piav qhia ntev ua haujlwm. Compression ratio piav qhia txog kev hloov pauv hauv channel geometry.
- Cov ntaub ntawv, pub mis thiab downstream kuj muaj nyob rau hauv tib lub qauv tshuaj xyuas.
- Peb cov pob tshab-granulation tsim ua khub 2.0: 1 rau 2.5: 1 piv nrog ntev L / D thiab me me shear, es tsis mus nrhiav qhov sib piv siab ib leeg.
- Ua ntej hloov geometry, sib piv cov duab kos, ntsia hlau ntsia hlau thiab ntsuas qhov sib piv.
Dab tsi yog extrusion ntsia hlau compression piv, thiab nws yuav suav li cas?
Geometric compression piv piv cov channel ntim muaj nyob rau hauv seem pub nrog rau hauv seem metering. Nyob rau hauv ib tug pa, tas mus li-cov txhuas ntsia hlau nrog sib piv channel dav thiab dav hlau geometry, cov neeg tsim qauv feem ntau siv qhov sib piv ntawm ob lub qhov tob tob. Mark A. Spalding piav qhia txog qhov sib npaug ntawm cov thawj coj hauvYas Technology.
Common depth-based expression:CR = Hf/ Hm
Hf= pub channel qhov tob; Hm= metering channel qhov tob.
Kev suav suav: 9 mm / 3 mm = 3.0, feem ntau sau 3: 1.
Channel qhov tob yog qhov radial deb ntawm lub hauv paus ntsia hlau mus rau lub davhlau sab nraum lub hnab ntawv. Hauv paus txoj kab uas hla yog txoj kab uas hla, tsis yog qhov tob channel. Yog hais tias ob qho tib si tau teev nyob rau tib lub cylindrical seem, qhov tob sib npaug ib nrab ntawm qhov sib txawv ntawm lub davhlau sab nraud thiab cov kab hauv paus. Siv tag nrho txoj kab uas hla sib txawv yuav muab ob npaug rau qhov tob.
A 3: 1 geometric piv tsis txhais hais tias cov polymer ncav cuag peb zaug nws pib siab los yog ntom. Nws piav txog qhov chaw uas cov ntsia hlau muab. Cov khoom thauj, melting thiab siab nyob ntawm qhov kev ua haujlwm. Allan Griff covSPE Extrusion Division sib tham txog cov ntsia hlau qhov ntevua kom muaj txiaj ntsig sib txawv ntawm qhov sib piv thiab qhov tseeb qhov ntev tom qab nws.
Rau qhov sib txawv-pitch, ntau lub dav hlau lossis lwm qhov tshwj xeeb geometry, thov cov neeg tsim khoom txhais lus thiab cov ntsiab lus channel ntim. Peb yuav tsis pom zoo xws li kev kos duab los ntawm kev siv cov qauv tob tob yam tsis tau kuaj xyuas nws cov kev xav.
Compression ratio vs L / D: qhov twg ntsia hlau qhov ntev tseem ceeb?
L / D yog cov ntsia hlau lub sijhawm ua haujlwm ntev muab faib los ntawm nws txoj kab uas hla. Compression ratio piv pub thiab metering geometry. Hloov ib qho tsis yog lej yuav tsum tau hloov lwm tus. Ib lub ntsia hlau ntev tuaj yeem khaws qhov tob tib yam, thaum lub ntsia hlau tsis hloov ntev tuaj yeem muaj qhov sib txawv hauv paus profile.
| Dimension | Qhov nws piav | Yuav thov dab tsi |
|---|---|---|
| Compression ratio | Pub-rau-metering channel kev sib raug zoo | Txhais lus ntxiv rau ob qho tib si channel qhov tob |
| L/D | Ua hauj lwm ntev piv rau nominal txoj kab uas hla | Ua hauj lwm-ntev pib thiab xaus datums |
| Kev ntsuas ntsuas qhov tob | Channel geometry nyob rau hauv qhov kawg pa ib cheeb tsam | Qhov tob, suab thiab ntev, tsis yog qhov sib piv xwb |
| Hloov ntev | Kev ncua deb ntawm qhov tob ntawm qhov channel txo qis | Ntev nyob rau hauv millimeters los yog kom meej meej ntau ntau ntawm D |
| Pitch thiab dav dav dav | Helical spacing thiab muaj channel dav | Tus nqi thiab txhua yam kev hloov pauv raws li cov ntsia hlau |
PebLDPE / HDPE zaj duab xis ib leeg-ntsia hlau ntau yamsuav nrog L/D xaiv 25:1, 28:1, 30:1, 33:1 thiab 35:1. Cov no yog cov kev xaiv ntev rau cov dej num sib txawv. Lawv tsis yog lub rooj ntawm compression ratios, thiab xaiv 35: 1 tsis tsim kom muaj qhov tseeb pub qhov tob.
Thaj tsam ntev kuj xav tau qhov pib pom zoo. Txwv tsis pub, ob tus neeg xa khoom tuaj yeem tshwm sim muab tib yam L / D thaum suav cov khoom sib txawv ntawm cov khoom. Griff tham txog kev ua haujlwm ntev thiab kev ua haujlwm hauv cheeb tsamnws piav qhia txog kev tsim ib leeg-ntsia hlau.
Peb qhov kev pom zoo yog los sib piv ib qhov profile nrog rau cov lus hais. Yog hais tias tus specification hais tias tsuas yog txoj kab uas hla, L / D thiab compression piv, nws tseem tso lub geometry qhib rau kev txhais. Qhov ntawd yog qhov kev pheej hmoo ntawm kev yuav khoom uas tsis tuaj yeem, txawm tias tag nrho peb tus lej xov tooj sib tw.
Vim li cas ob lub 3: 1 extruder screws tuaj yeem coj txawv txawv
Xav txog peb qhov kev piav qhia cov qauv siv nrog tib lub nominal txoj kab uas hla, sib npaug ntawm cov hlau lead hauv cov khoom noj thiab ntsuas qhov ntsuas, thiab sib piv cov davhlau geometry. Txhua tus muaj qhov tob-raws li compression piv ntawm 3: 1. Tsis muaj leej twg yuav hloov pauv tau nrog lwm tus. Cov piv txwv hauv qab no yog kev sib piv geometric, tsis yog Nanhaiya cov khoom loj lossis ntsuas cov txiaj ntsig ntau lawm.
| Profile | Pub qhov tob | Kev ntsuas ntsuas qhov tob | Hloov ntev | Lus nug |
|---|---|---|---|---|
| A | 9mm ib | 3 hli | 6D | Lub hauv paus rau kev sib piv no |
| B | 12 mm | 4 hli | 6D | Yuav ua li cas cov kab sib sib zog nqus hloov kev pub mis thiab tso dej? |
| C | 9mm ib | 3 hli | 10D | Puas yog qhov kev hloov pauv ntev dua zoo dua qhov kev sib tw melting? |
Hauv A thiab B, ob qho tib si qhov tob txo rau tib tus lej, tab sis B muaj cov kab sib sib zog nqus. Qhov piv yog li tsis tuaj yeem txheeb xyuas qhov loj ntawm cov khoom noj lossis ntsuas cov channel. Hauv A thiab C, cov ntsiab lus kawg sib tw, tab sis C kis tau tib qhov tob kom txo tau qhov ntev dua. Nws qhov nruab nrab qhov tob txo ib chav tsev ntev yog qis dua.
Cov kev sib piv no piav qhia vim li cas peb thiaj li thov rau qhov profile es tsis lees txais qhov piv txwv raws li kev qhia ua tiav. Lawv tsis ua pov thawj uas profile tsim cov khoom zoo dua. Qhov kev txiav txim siab no tseem xav tau cov resin, pub daim ntawv, ntsia hlau ceev, chim npaj thiab downstream load.
Ntawm lub tshuab uas twb muaj lawm, qhov hloov pauv ntxiv yuav tsum tau los ntawm qhov chaw nyob hauv qhov muaj sijhawm ua haujlwm. Tshawb xyuas thaj tsam twg luv dua thiab qhov kev hloov pauv txhais tau li cas rau nws txoj haujlwm. Kev tshuaj xyuas kev kos duab yuav tsum qhia qhov kev lag luam tawm kom meej, tsis yog nthuav tawm qhov kev hloov pauv ntev dua li kev txhim kho dawb.
Yuav ua li cas lub extruder pub chim cuam tshuam cov ntsia hlau xaiv
Cov khoom noj khoom haus yuav tsum xa cov khoom siv uas cov ntsia hlau hauv qab tuaj yeem yaj thiab ntsuas. Nws tus cwj pwm nyob ntawm cov khoom noj khoom haus thiab kev sib cuag nrog cov ntsia hlau thiab lub thoob. Spalding covtsom xam ntawm cov khoom conveyingtxuas compression-ratio xaiv nrog resin cwj pwm thiab feedstock bulk ntom.
Rau kev tshuaj xyuas, piav qhia txog dab tsi tiag nkag mus rau hauv lub hopper: pellets, regrind, flakes, ib tug blend los yog ib tug sau compound. suav nrog cov kev hloov pauv hauv qhov kev faib ua feem ntawm cov pub. Ib lub npe khoom xws li PE tsis sib txuas lus hauv daim ntawv los yog seb cov khoom noj puas zoo ib yam los ntawm kev khiav haujlwm.
Txheeb xyuas lub extruder feed chim thiab. Ib qho txias, grooved pub seem yog ib qho kev tsim qauv sib txawv los ntawm cov pa bore du. Griff tuskev sib tham txog kev pub noj groovedpiav qhia vim li cas nws cov ntsia hlau geometry tuaj yeem sib txawv heev. Kev hloov pauv qhov sib piv ntawm qhov sib npaug ntawm qhov sib npaug mus rau qhov grooved-feed system yam tsis tau tshuaj xyuas cov khub tsis yog lub suab luv luv.
Peb yuav thov cov duab thiab kos duab ntawm qhov pub qhib thiab ib qho grooved insert, ua ke nrog qhov tseeb txias txias. Cov kev txheeb xyuas no muaj txiaj ntsig ntau dua li qhov nce qhov piv txwv los them nyiaj rau qhov teeb meem pub mis uas tsis tau txheeb xyuas.
Peb cov khoom ua yeeb yaj kiab muaj xws li abimetallic yuam-noj ib leeg-ntsia hlau configuration. Thaum tham txog qhov kev xaiv ntawd, cov lus nug yog yuav ua li cas nws lub peev xwm pub mis yog qhov yuav tsum tau yaj thiab ntsuas dej. Kev noj ntau zog ib leeg tsis tsim kom cov kab tuaj yeem tsim tau ntau dua zaj duab xis.
Rau lub tshuab uas tsis ruaj khov, tsim kom muaj kev noj zaub mov rov qab ua ntej sib piv cov neeg sib tw geometries. Txwv tsis pub, qhov kev sim tuaj yeem muab nqi zog rau kev hloov pauv ntawm cov khoom siv ib ntus thiab tawm ntawm cov ntsia hlau xaiv tsis daws teeb meem.
Xaiv cov yas extruder ntsia hlau rau koj cov khoom thiab cov khoom
Pib nrog cov khoom tiav qhov kev txwv txwv. Pob tshab granules xav tau kev tshuaj xyuas sib txawv los ntawm cov yeeb yaj kiab ua nrog hloov cov ntsiab lus rov ua dua tshiab lossis lub vaj huam sib luag tseem ceeb uas muaj cov khoom ntxiv. Pebib leeg-ntsia hlau khoom tsev neegcais cov haujlwm no vim tias lub npe polymer tsis piav qhia txog txoj haujlwm.
| Daim ntawv thov | Cov ntaub ntawv tsim nyog Nanhaiya | Peb xaiv qhov tseem ceeb |
|---|---|---|
| Pob tshab granulation | Cov ntaub ntawv ntau lawm qhia meej 2.0: 1 txog 2.5: 1, ntev L / D thiab me me shear; smooth lub taub hau hloov thiab nruam grooves | Txheeb xyuas qhov sib npaug ntawm qhov sib npaug thiab khaws cia-nrawm hloov ua ke nrog qhov sib piv |
| LDPE / HDPE zaj duab xis | Discrete diameters los ntawm 30 mus rau 150 mm; L/D xaiv muaj xws li 25: 1 txog 35: 1; yuam-feed configuration | Sib phim cov khoom noj khoom haus tiag tiag, kab thauj khoom thiab muaj sijhawm ua haujlwm ua ntej kho qhov tob |
| Aluminium-yas vaj huam sib luag core | Cov kab uas hla 65, 90, 120 thiab 150 mm; polished raws, sib npaug los yog torpedo taub hau, barrier-hom mixing | Xav txog kev faib khoom ntxiv, ntws hloov pauv thiab xaiv qhov chaw zoo li compression |
| Filled los yog recycled pub | PTA hardfacing ntawm lub davhlau saum thiab sab; WC thiab nickel-based nto xaiv | Sib tw tiv thaiv rau hnav mechanism thiab khaws lub thoob hauv kev tshuaj xyuas cov khoom |
Daim duab 2.0: 1 txog 2.5: 1 belongs rau daim ntawv thov tshwj xeeb cov ntsiab lus ntawm peb cov pob tshab-granulation ntsia hlau. Nws tsis yog ib qho kev pom zoo rau txhua lub pob tshab, txhua qhov txheej txheem PS lossis txhua lub tshuab. Kev sib txuas tsim kuj tseem hais txog kev sib xyaw thiab kev hloov pauv, yog li luam nws qhov piv ib leeg yuav tawm ntawm ib feem ntawm cov lus qhia.
Rau kev tsim vaj huam sib luag tseem ceeb, peb cov khoom siv cov khoom sib xyaw ua ke rau cov xim, nplaim hluav taws thiab lwm yam khoom ntxiv. Peb yuav tshuaj xyuas qhov kev sib xyaw ua haujlwm thiab cov qauv ua ntej pom zoo kom nruj dua compression profile. Ib qho piv txwv ntau dua tsis, los ntawm nws tus kheej, qhia txog kev faib khoom ntxiv lossis cov khoom siv sib xws.
Yuav ua li cas thaum lub compression profile siab dhau los yog qis dhau?
Ob qho tib si compaction tsis txaus thiab kev pub noj ntau dhau los ntawm qhov muaj peev xwm yaj tuaj yeem ua rau muaj teeb meem. Cov tsos mob ib leeg tsis qhia koj qhov twg siv tau. Peb yuav ceev faj txog kev qhia ntawv, "tso qhov piv txwv kom tshem tawm cov khoom tsis zoo" lossis "tso qis kom txo tau qhov tsis xws luag," yam tsis muaj qhov ntsuas qhov ntsuas thiab txheej txheem.
Cov ntaub ntawv PS uas tau sau tseg: hloov ntau dua li qhov piv
Spalding qhia txog 63 mm PStxhaj tshuaj moldingplasticating ntsia hlau nrog txog 5% splay tsis lees paub. Nws qhov tob pub tau nce ntawm 0.325 mus rau 0.405 nti, thaum ntsuas qhov tob tseem nyob 0.135 nti. Qhov sib piv tau nce los ntawm kwv yees li 2.4 txog 3.0; qhov kev hloov pauv kuj lengthened los ntawm 3.3D. Cov txiaj ntsig tau tshaj tawm yog tshem tawm ntawm splay, 8% luv luv voj voog thiab 14% ntau dua cog peev. Cov no yog tus sau qhov kev tshwm sim, tsis yog kev sim Nanhaiya.Nyeem cov ntaub ntawv qub thiab geometry hloov.
Cov lus qhia muaj txiaj ntsig yog kev sib koom tes hloov pauv. Tus neeg yuav khoom tsis tuaj yeem rov tsim dua qhov kev cuam tshuam los ntawm kev sau 3: 1 ntawm kev yuav khoom. Qhov pub tob thiab kev hloov pauv hloov ua ke, thiab cov txheej txheem yog txhaj tshuaj molding. Tsis yog qhov feem pua kev txhim kho lossis qhov kev xaiv qhov piv txwv tsim lub hom phiaj rau txoj kab txuas txuas ntxiv mus.
Ib qho extrusion counterexample
Tib tsab xov xwm piav qhia txog ABS hauv 6-nti, ob-theem vented extruder. Thawj theem piv ntawm 3.1 overfed lub melting seem, thiab cov khib nyiab ntsaws ib kauv dam. Tus neeg sau tau thov ib qho tshiab 2.5-qhov sib npaug ntawm cov ntsia hlau. Tsab xov xwm tsis qhia txog tus lej tom qab hloov pauv cov txiaj ntsig tau txais txiaj ntsig rau qhov xwm txheej ntawd.
Nyeem cov xwm txheej no los kuaj xyuas kev thauj mus los thiab kev sib tsoo ua ke. Ib qho tau txais txiaj ntsig los ntawm kev sib sau ua ke ntau dua; lwm tus xav tau qhov sib txawv pub mis. Peb txoj cai xaiv yog txhawm rau txheeb xyuas qhov txwv ntu thiab khaws cov xwm txheej tom qab qhov kev hloov pauv. Lub npe tsis zoo tsis yog qhov tshwj xeeb ntsia hlau.
Barrier thiab vented screws: vim li cas ib qho piv txwv tsis txaus
Ib tug barrier ntsia hlau cais cov khib nyiab thiab yaj txoj kev los ntawm ib feem ntawm cov ntsia hlau. Lub vented ntsia hlau qhia txog lwm qhov kev hloov pauv hauv qhov tob channel thiab lub luag haujlwm ntawm lub twj tso kua mis. Txo tus qauv tsim rau ib qho kev pub-rau-qhov kawg-metering piv zais cov yam ntxwv uas yuav tsum tshwm sim hauv kev tshuaj xyuas.
Nyob rau hauv ib qho barrier seem, nug seb cov khib nyiab channel txo qis, yuav ua li cas cov yaj channel txhim kho, thiab dab tsi geometry tswj kev hloov mus thoob lub davhlau barrier. Ib qho piv txwv qhov tob tsis piav txog txoj kev ntawd. Griff piav qhia qhov txawv hauvnws barrier-ntsia hlau sib tham; pebcoj mus rau cov pa, barrier thiab mixing screwstxuas cov terminology nrog xaiv.
Rau kev tsim qauv vented, tshuaj xyuas thawj theem, thaj tsam decompression thiab downstream pumping theem sib cais. Nug qhov twg melting yuav tsum ua kom tiav thiab yuav ua li cas theem thib ob tswj cov khoom xa los ntawm thaj tsam qhov cua tiv thaiv cov dej ntws tawm. Qhov chaw qhov cua yog nyob rau ntawm lub thoob kos duab thiab cov ntsia hlau profile, nrog kev sib txuam axial datums.
Peb kuj tseem yuav paub qhov txawv ntawm cov khoom lag luam barrier-hom mixing feature los ntawm tag nrho cov txheej txheem melt-extraction barrier ntsia hlau. Lo lus "barrier" ntawm nws tus kheej tsis txaus los tsim kom muaj kev npaj channel. Siv cov duab kos los txheeb xyuas qhov tshwj xeeb es tsis yog xav tias txhua tus neeg siv khoom siv lub sijhawm rau tib lub geometry.
Cov qauv tsim no tuaj yeem tsim nyog thaum lawv cov dej num sib haum nrog cov txheej txheem. Lawv tsis yog kev hloov kho tsis siv neeg rau txhua txoj kab ib leeg. Rau kev sib piv cov lus hais, xav tau lub tswv yim feature qhov chaw, qhov ntev thiab lub hom phiaj. Txwv tsis pub, koj tab tom sib piv cov ntawv tsim qauv siv cov kev daws teeb meem rau tib qhov yuav tsum tau ua.
Xyuas lub extruder ntsia hlau thiab chim ua ntej hloov qhov piv
Ib qhov profile tshiab yuav tsum daws qhov kev txwv tsis pub muaj. Yog hais tias cov kab yav dhau los ua tau raws li nws cov kev ua tau zoo thiab cov hom phiaj tso tawm nrog cov khoom siv tib yam, kev ua kom tsis zoo yog qhov laj thawj los tshuaj xyuas cov xwm txheej thiab kev hloov pauv kev ua haujlwm ua ntej txiav txim siab qhov piv txwv tsis raug.
Extruder ntsia hlau coj teeb meem uas tuaj yeem ua raws li qhov teeb meem tsim
Ntsuas cov ntsia hlau thiab qhov sib txuam ntawm cov khoom siv axial. Sau lub davhlau txoj kab uas hla, bore txoj kab uas hla thiab saum npoo av, siv daim ntawv pom zoo siv kos duab qhov twg muaj. Pebib leeg-ntsia hlau thiab chim hnav-kev ntsuas phau ntawv qhiapiav qhia tias yog vim li cas tus qauv hnav yog cov pov thawj mob es tsis yog ib daim qauv zoo ntawm tus qauv tsim.
| Pom teeb meem | Pov thawj los sau ua ntej | Cov lus nug tsim tom qab |
|---|---|---|
| Cov zis poob thaum lub sijhawm | Matched ntsia hlau / chim ntsuas; cov ntaub ntawv sib piv thiab cov ntaub ntawv ua haujlwm | Puas yog geometry tsis txaus, lossis puas muaj kev hloov pauv? |
| Unmelted hais | Pub sib xws, throughput, ceev, yaj soj ntsuam thiab txwv keeb kwm | Puas yog kev noj haus ntau tshaj qhov muaj peev xwm melting? |
| Dub specks tom qab hloov | Cov ntaub ntawv thiab kev tu keeb kwm; deposits thiab flow-transition condition | Puas yog qhov kev thov hloov chaw nyob tuav lossis tsuas hloov qhov piv? |
| Siab los yog lub cev muaj zog-load cycling | Lub sij hawm-aligned pub, ceev, kub, siab thiab load cov ntaub ntawv | Yam twg lossis kev txwv hloov ua ntej? |
Cov lus no yog ib qho kev npaj sau, tsis yog ib qho kev kuaj mob. Piv txwv li, ib daim duab ntawm cov specks dub tsis tuaj yeem txheeb xyuas lawv cov keeb kwm hauv cov ntsia hlau. Khaws cov kev soj ntsuam cais los ntawm cov txheej txheem npaj kom txog rau thaum kev tshuaj xyuas thiab cov ntaub ntawv ua haujlwm txhawb nqa kev sib txuas.
Surface specification yog lwm qhov teeb meem cais. Pebhnav-resistant ib leeg-ntsia hlau xaivsuav nrog hardfacing ntawm lub davhlau saum thiab sab. Xaiv qhov kev tiv thaiv no tsis txhais tau qhov tseeb channel profile, thiab hloov qhov profile tsis kho lub thoob loj. Peb yuav daws ob nqe lus nug ua ntej pom zoo ib qho kev hloov pauv.
Dab tsi yog ib qho kev kos duab extruder yuav tsum qhia rau kev tshuaj xyuas cov ntsia hlau
Ib qho kev kos duab extruder yuav tsum cia ob tog txheeb xyuas qhov nyob twj ywm, qhov hloov pauv thiab qhov hloov pauv haum li cas. Nrog rau nominal txoj kab uas hla thiab ua hauj lwm ntev, qhia pub thiab metering qhov tob, cheeb tsam lengths, suab, dav dav dav, nws nta, lub taub hau geometry thiab tsav kev twb kev txuas. Ua ke nws nrog chim bore thiab cov ntaub ntawv interface.
Yuav ua li cas peb tshuaj xyuas compression piv ua ntej pom zoo ib tug ntsia hlau
Thaum peb tshuaj xyuas cov ntsia hlau specification, peb pib nrog cov khoom, pub mob thiab cov teeb meem ntau lawm. Ib qho kev thov rau "65 hli ntsia hlau nrog 3: 1 compression piv" tawm ntau qhov kev txiav txim siab qhib. Peb tseem xav tau qhov tseeb pub thiab ntsuas qhov tob ntawm qhov tob, qhov ntev ntawm kev hloov pauv, ntsia hlau suab thiab lub thoob lub cev.
Pebtechnical matching kev pab cuamsuav nrog cov khoom tsim khoom, cov qauv khoom siv thiab cov peev txheej yuav tsum ua nrog txoj kab uas hla, L / D thiab qhov tob tob. Qhov ntawd yog lub hauv paus peb yuav siv rau kev tshuaj xyuas compression-piv. Cov teeb meem kev khiav hauj lwm los ua ntej; ib tug nyiam piv yuav tsum tsis predetermine qhov kev kuaj mob.
Rau pob tshab granulation nrog dub specks los yog cov khoom tsis ruaj khov, peb yuav cais cov khoom npaj, yaj zoo thiab cov khoom siv ua ntej hloov geometry. Peb yuav nug seb qhov kev hloov pauv tau ua raws li kev hloov pauv, tu lossis siab dua, lossis maj mam tshwm sim. Cov kev soj ntsuam no txiav txim siab seb cov pov thawj twg los thov tom ntej.
Peb cov pob tshab-granulation tsim ua ke nrog nws daim ntawv thov tshwj xeeb piv nrog ntev L / D, me me shear thiab smooth flow transitions. Peb yuav tshuaj xyuas cov yam ntxwv no ua ke. Tsuas yog luam qhov piv yuav tawm ntawm kev sib xyaw ua haujlwm, kev hloov pauv ntawm lub taub hau thiab qhov xav tau ntawm qhov chaw tsis daws teeb meem.
Kev ceev faj tib yam siv rau ib qho qauv hnav. Peb yuav muab piv nrog cov kev pom zoo kos duab thiab kev ntsuas qhov sib npaug, tsis yog kho txhua qhov seem seem raws li qhov qub. Ib qho 9/3 mm profile thiab 12/4 mm profile yog ob qho tib si 3: 1, yog li qhov piv tsis tuaj yeem daws qhov tsis sib haum xeeb ntawm kev kos duab thiab kev ntsuas.
Ua ntej machining, pom zoo rau khaws cia thiab hloov pauv geometry, cov khoom siv thiab qhov xav tau ntawm qhov chaw, thiab txoj kev lees paub. Rau kev sib piv ntau lawm, sau cov khoom noj, cov zis zoo, cov ntsia hlau ceev, ntsuas qhov kub thiab txias, siab, lub cev muaj zog load thiab cov txheej txheem tsis raug. Ib qho txiaj ntsig zoo yog ib qho uas koj tuaj yeem sib piv hauv cov xwm txheej tau hais tseg.
Xa ib pob tshuaj xyuas uas tuaj yeem txhawb kev txiav txim siab
- Txhais lub luag haujlwm.Muab cov qib resin, particle daim ntawv, additives, recycled cov ntsiab lus, cov khoom thiab yuav tsum tau zoo-tso tawm tus nqi.
- Piav lub tshuab.suav nrog lub tshuab qauv, tsav cov ntsiab lus, ntsia hlau kos duab, kos duab lub tog raj kheej thiab ib qho grooved-feed lossis vent arrangement.
- Document lub hauv paus.Sau cov kev ua haujlwm thiab cov tsos mob raws sijhawm, ntxiv rau kev ntsuas kev hnav yog tias cov khoom twb tau ua haujlwm lawm.
- Sib piv cov lus pom zoo.Tshuaj xyuas ob qho tib si channel qhov tob, qhov ntev ntawm kev hloov pauv, suab thiab cov yam ntxwv tshwj xeeb, hais txog vim li cas rau txhua qhov kev hloov pauv.
- Pom zoo rau kev lees txais.Txhais qhov kev tshuaj xyuas qhov ntev thiab kev tsim khoom-kev sib piv ua ntej pom zoo rau kev tsim khoom.
Tham txog koj qhov profile nrog Nanhaiya
Xa cov profile, cov ntaub ntawv cov ntsiab lus thiab cov teeb meem kev tsim khoom tam sim no rau Zhoushan Nanhaiya Plastic Machinery Co., Ltd. Peb tuaj yeem tshuaj xyuas qhov cuam tshuam.daim ntawv thov ib leeg-ntsia hlauthiab parameter-matching xav tau nrog koj.
Thov ib tug ntsia hlau specification xyuasEmail:info@nhyscrew.com ib
Xov tooj:+86-13505809643
Cov lus nug uas nquag nug
Yuav ua li cas koj xam extrusion ntsia hlau compression piv?
Rau cov pa ib leeg ntsia hlau nrog tib cov hlau lead nyob rau hauv qhov chaw pub thiab metering thiab sib piv cov davhlau geometry, qhov kev qhia qhov tob-raws li kev qhia yog pub channel qhov tob muab faib los ntawm metering channel qhov tob. Lub 9 hli pub qhov tob thiab 3 hli metering qhov tob muab 3: 1. Rau qhov tshwj xeeb geometry, paub meej tias channel-ntim lub ntsiab lus es tsis yog xav tias qhov tob shortcut siv.
Puas yog compression piv zoo ib yam li L/D?
Tsis yog. Compression ratio piav txog kev sib raug zoo ntawm kev pub-rau-metering channel. L / D yog ua hauj lwm ntev muab faib los ntawm nominal ntsia hlau txoj kab uas hla. Lawv teb cov lus nug sib txawv, yog li cov lus hais ntawm cov ntsia hlau yuav tsum hais ob qho tib si thiab txhais cov ntaub ntawv ua haujlwm ntev. Tsis muaj tus lej hloov qhov tseeb channel qhov tob thiab thaj tsam ntev uas xav tau los tshuaj xyuas cov duab geometry.
Puas yog qhov sib piv ntau dua compression ib txwm txhim kho melting?
Tsis yog. Ib qho piv txwv yuav tsum haum rau kev pub mis, melting thiab metering tshuav. Ua kom nws tuaj yeem hloov pauv kev muaj peev xwm pub noj yam tsis tau daws qhov txwv ntu. Ua ntej xaiv tus nqi siab dua, tshuaj xyuas seb qhov ntsuas qhov ntev npaum li cas hloov pauv tus txheej txheem, suav nrog qhov ntev ntawm kev hloov pauv thiab kev txwv kev sib xyaw hauv qab. Muab piv tau txais cov zis thiab yaj zoo, tsis yog qhov piv ntawm ib leeg.
Tib lub polymer puas tuaj yeem xav tau cov ntsia hlau sib txawv thaum cov khoom hloov pauv?
Yog lawm. pellets, regrind, flakes thiab puv blends yog txawv pub mis txawm tias thaum lawv sib koom lub npe polymer. Muab daim ntawv pub noj tiag tiag, muaj pes tsawg leeg thiab sib xws thaum lub sijhawm tshuaj xyuas. Ib tug yav dhau los ntsia hlau qhov kev ua tau zoo nrog ib tug feedstock tsis tsim hais tias nws compression profile yuav haum rau lwm tus.
Puas tuaj yeem hloov cov ntsia hlau nrawm hloov qhov sib piv ntawm qhov sib txawv ntawm qhov sib txawv?
Tsis yog. Screw ceev hloov qhov kev ua haujlwm, tsis yog machined channel geometry. Nws tuaj yeem hloov txoj kab kev pub mis, yaj thiab siv tus cwj pwm, yog li kev ceev yog nyob rau hauv cov txheej txheem ntau lawm thiab cov ntaub ntawv sim. Kev nce lossis txo qis rpm tsis tig 2.5: 1 qhov tob rau hauv 3: 1 profile.
Cov ntaub ntawv dab tsi ploj los ntawm kev txiav txim rau 3: 1 ntsia hlau?
Qhov kev txiav txim tseem xav tau qhov tseeb pub thiab ntsuas qhov tob, txoj kab uas hla, ua haujlwm ntev, hloov qhov ntev, suab, davhlau geometry thiab txhua qhov sib xyaw lossis vented nta. Nws tseem xav tau kev tsav tsheb thiab lub thoob sib raug zoo, cov khoom siv thiab cov kev xav tau saum npoo, thiab lub luag haujlwm tsim khoom. Yog tias tsis muaj cov ntsiab lus no, ntau qhov sib txawv ntawm cov ntsia hlau tuaj yeem ua rau tib yam 3: 1 piav qhia.
