What is a conical twin screw barrel?

It is a tapered twin-bore extrusion component in which two conical screws rotate inside a matching conical barrel. The taper compresses and plasticizes material over a short length, making the conical screw barrel ideal for PVC pipe, profile, sheet and WPC extrusion.

What materials is it best used for?

Rigid PVC (pipe, profile, board and sheet), wood-plastic composite, PE-based profiles and resin tile, plus PVC pelletizing. It handles low-bulk-density dry-blend powders especially well thanks to its large feed-end intake.

How is it different from a parallel twin screw barrel?

A conical barrel tapers and builds high compression with gentle shear, suiting direct PVC/WPC extrusion. A parallel twin screw barrel keeps a constant diameter and higher shear, which suits compounding, masterbatch and very high-filler formulations.

What is the typical clearance between screw and barrel?

Clearance is the small gap between the flight tip and the bore wall. It is set tight and accurate on a new part; as it opens up from wear, output and pressure drop. Measuring it periodically is the clearest way to track barrel wear.

How do I install a conical twin screw barrel?

Power down and lock out, clean the mating faces, mount and align so the screws turn freely, wire each heater zone and thermocouple correctly, then bring the barrel up to temperature slowly and soak it before starting the screws.

What causes wear in conical twin screw barrels?

Mainly abrasive fillers such as calcium carbonate, wood fiber and glass, made worse by corrosion from PVC processing, poor maintenance and under-specified hardness. A deeper bimetallic or tungsten-carbide layer resists all three far better.

How often should the barrel be inspected or replaced?

Do visual and purge checks monthly and measure clearance quarterly. Replacement timing depends on filler load and run hours — track the wear trend rather than waiting for a failure, and rebuild or replace once clearance moves past spec.

How do I choose the right size for my extrusion line?

Match the diameter ratio and length to your extruder model and target output, then pick a surface treatment based on how abrasive your formulation is. Send a drawing or a sample with key dimensions so the barrel is an exact fit, not an approximation.

Conical Twin Screw Barrel: Ua tiav Daim Ntawv Qhia rau Specs, Daim Ntawv Thov & Kev Xaiv

2026-08-05 0 Tso lus rau kuv

Los ntawmNanhaiya Technical Team— Ntsia Hlau & Barrel Engineering, Zhoushan · Tshuaj xyuas rau lub Hoobkas raug · ~ 10 min nyeem

Teb ceev

Lub conical ntxaib ntsia hlau chim yog ib tug tapered, ntxaib-bore extrusion tivthaiv nyob rau hauv uas ob conical screws tig nyob rau hauv ib tug sib xws conical chim. Lub tapered geometry muab lub zog noj thiab siab compression nyob rau hauv ib tug luv luv ntev, uas yog vim li cas lubconical ntxaib ntsia hlau thiab chimyog tus qauv xaiv rau PVC yeeb nkab, profile, ntawv thiab WPC extrusion.

Yog tias koj khiav PVC lossis ntoo-yas kab, lubconical ntxaib ntsia hlau chimyog ib qho ntawm cov khoom uas ncaj qha txiav txim siab koj cov zis, yaj zoo thiab cov nqi khiav. Xaiv qhov loj me, cov khoom siv lossis kev tshem tawm thiab koj them rau nws thaum hnav, seem thiab downtime. Phau ntawv qhia no npog yuav ua li cas lub conical ntsia hlau chim ua hauj lwm, specifications uas tseem ceeb thaum koj yuav, yuav ua li cas nws txawv ntawm ib tugparallel ntxaib ntsia hlau chim, thiab yuav ua li cas xaiv, nruab thiab tuav ib qho - sau los ntawm qhov kev xav ntawm lub Hoobkas uas tshuab cov khoom no txhua hnub.

Conical twin screw barrel manufactured by Nanhaiya — Lub conical ntxaib ntsia hlau thiab chim teeb - lub tapered bores muab luv-ntev compression zoo tagnrho rau tshav kub-sensitive PVC.

Yuav ua li cas lub conical twin ntsia hlau chim ua haujlwm

Hauv ibconical ntxaib ntsia hlau extruder, ob lub screws zaum ntawm ib sab ntawm lub kaum sab xis me ntsis, dav ntawm qhov kawg pub thiab nqaim ntawm qhov kawg tuag. Lub thoob bores taper kom phim. Raws li cov khoom siv raw txav los ntawm qhov loj-inch pub cheeb tsam mus rau qhov me me-inch metering cheeb tsam, lub ntim ntim compresses thiab plasticizes nws thaum lub davhlau intermeshing conveying thiab sib tov. Vim hais tias ob lub ntsia hlau tig tig thiab ua tiav intermesh, lub conical ntxaib ntsia hlau thiab lub thoob ua haujlwm yuav luag zoo li lub twj tso kua mis zoo - cov khoom tso tawm tsis tu ncua ntawm qis, maj mam shear, uas tiv thaiv tshav kub-rhiab polymers xws li PVC.

Cov txheej txheem tawg mus rau hauv peb theem:

Pub & conveying— the large feed-end diameter gives a big intake volume, so powder blends and low-bulk-density material (like PVC dry-blend) are pulled in reliably without bridging.
Compression & plasticizing- lub taper txo cov channel ntim raws qhov ntev, compacting cov khoom, tsav tawm huab cua thiab melting nws los ntawm kev sib xyaw ua ke cua sov thiab txhua yam ua hauj lwm.
Metering & tso tawm- qhov nqaim metering cheeb tsam tsim lub siab ruaj khov thiab thawb ib qho kev sib xws, homogeneous yaj los ntawm kev tuag ntawm tus nqi tswj.

Lub thoob ua ntau tshaj lub tsev cov screws. Nws nqa cov cua sov thiab cov chaw txias txias uas tuav txhua theem ntawm qhov kub thiab txias. Nanhaiya chim siv ntau thaj chaw cua sov thiab cua txias tsim - feem ntau pub, compression thiab homogenization zones - nrog kev xaiv lub tshuab nqus tsev nqus kom rub cov dej noo thiab cov volatiles tawm ntawm cov yaj, uas tseem ceeb rau cov khoom sib xyaw ua ke thiab hygroscopic.

Cov ntsiab lus tseem ceeb los xyuas ua ntej koj yuav

Ob lub conical chim tuaj yeem saib zoo ib yam thiab ua tau txawv heev. Cov no yog cov lus qhia tshwj xeeb uas txiav txim siab haum, tso zis thiab hnav lub neej - tus lej koj yuav tsum tau lees paub ntawm cov lus hais.

Cov khoom tshwj xeeb	Nws txhais li cas	Vim li cas thiaj tseem ceeb
Txoj kab uas hla	Lub feed-end / die-end diameter, e.g. 45/90, 50/105, 55/110, 65/132, 80/156, 92/188 hli	Teem lub tshuab chav kawm thiab cov khoom tso tawm - yuav tsum phim koj tus qauv extruder raws nraim
L/D ratio	Ua haujlwm ntev vs txoj kab uas hla	Ntev ntev ntev = ntau lub sij hawm nyob rau tag nrho fusion thiab degassing
Cov ntaub ntawv qib	38CrMoAlA nitrided steel, W6Mo5Cr4V2, HIP hmoov hlau, los yog bimetallic	Ncaj nraim tsav hnav lub neej thiab kev tiv thaiv corrosion tiv thaiv cov khoom ntim / PVC
Kev kho deg & hardness	Nitriding, chrome plating, bimetallic alloy los yog tungsten-carbide tsuag	Nanhaiya txau ib txheej tungsten-ntxiv alloy kom ncav cuag62 HRChauv lub chim vs ib txwm 58 HRC
Alloy txheej qhov tob	Thickness ntawm hnav-resistant puab txheej	Nanhaiya's bimetallic txheej yog 2.5-3 mm - txheej tob txhais tau tias lub qhov rais siv tau ntev dua
Ntsia Hlau / chim clearance	Qhov sib txawv ntawm lub davhlau yaig thiab bore phab ntsa	Loj dhau = siab poob thiab tso zis tsawg; nruj, raug qhov sib txawv ua kom efficiency siab
Tolerance / ncaj	Machining precision ntawm qhov tiav	Nanhaiya tuav conical twin chim rau ± 0.0005 hli rau qhov zoo ib yam, rov ua kom haum
Cov zis muaj peev xwm (kg / h)	Rated throughput rau qhov loj	Tus lej ntawm tus neeg yuav khoom hauv qab - phim nws rau koj cov kab nrawm thiab cov khoom lag luam

General kev lag luam ceeb toom:conical loj designations xws li 45/90 los yog 65/132 (pub / tuag txoj kab uas hla nyob rau hauv mm) yog muaj nyob rau hauv SJZ-hom conical machines, yog li ib lub thoob tau teev tseg txoj kev no feem ntau yuav txuam nrog ib tug uas twb muaj lawm extruder. Ib txwm paub meej txog kev kos duab lossis qauv ua ntej xaj. Koj tuaj yeem pom qhov ntau thiab tsawg ntawm pebconical ntxaib ntsia hlau chimnplooj.

Conical vs parallel twin ntsia hlau chim

Cov lus nug feem ntau cov neeg yuav khoom nug yog seb lawv puas xav tau lub conical lossis aparallel ntxaib ntsia hlau chim. Ob leeg yog ntxaib-ntsia hlau, ob qho tib si intermesh - tab sis lub geometry haum rau ntau txoj haujlwm. Hauv luv luv: conical excels ntawm ncaj qha PVC / WPC extrusion ntawm yeeb nkab, profile thiab board; thaum uas tig mus yog muaj zog rau compounding, masterbatch thiab high-filler formulations.

Qhov xwm txheej	Conical twin ntsia hlau chim	Parallel twin ntsia hlau chim
Pub tus cwj pwm	Kev qhib pub loj loj - kom tau txais txiaj ntsig zoo dua rau cov hmoov uas tsis tshua muaj ntau	Kev pub mis ntau dua rau kev sib xyaw thiab pellet pub
Compression	High compression ua rau hauv daim duab tapered	Ntau tas li compression raws ib txoj kab uas hla
Kub / shear	Gentler, tswj kev ua haujlwm - zoo rau cov hluav taws kub-rhiab PVC	Siab shear - zoo dua rau kev sib xyaw ua ke thiab tawg
Hom kev siv	PVC yeeb nkab, profile, ntawv, WPC, resin pobzeb	Masterbatch, compounding, high-CaCO₃ thiab iav-filled ua haujlwm
Kev tu	Hnav thiab tshem tawm yuav tsum tau saib xyuas ze ntawm lub taper	Feem ntau yooj yim geometry standardization thiab cov khoom hloov

Txoj cai tseem ceeb ntawm tus ntiv tes xoo: yog tias koj cov khoom kawgyoglub extrudate (ib lub yeeb nkab los yog lub rooj tsavxwm ncaj tawm ntawm qhov tuag), lub conical twin ntsia hlau chim feem ntau yog cov cuab yeej zoo. Yog tias koj tab tom ua pellets lossis dispersing ib qho xav tau ntxiv pob, saib ntawm qhov sib npaug ntxaib ntsia hlau thoob - tshwj xeeb tshaj yog cov khoom sib hloov rau cov khoom siv carbonate siab heev. Tsis paub meej qhov twg haum rau koj txoj kab? Pebib leeg ntsia hlau, conical thiab parallel ranges yog tag nrho cov qhia nyob rau hauvcov khoom page.

Cov ntawv thov siv

Vim tias nws muab cov khoom noj muaj zog, siab compression thiab maj mam shear, lub conical ntxaib ntsia hlau thiab lub thoob yog lub workhorse ntawm nruj-PVC thiab ntoo-yas extrusion. Nws ua haujlwm zoo tshaj plaws rau:

PVC cev- Kev siv dej, tso dej thiab cov kav dej los ntawm cov khoom siv PVC qhuav.
PVC qhov profile- qhov rais thiab qhov rooj profiles, ntug banding thiab trim.
PVC board & ntawv- ua npuas ncauj board, marble-zoo daim ntawv thiab dawb-ua npuas ncauj board (saib pebPVC board conical twin ntsia hlau chim).
WPC (wood-yas composite)- decking, phab ntsa panels thiab profiles los ntawm cov ntoo-fiber-filled compounds.
PE-raws li thiab resin-cov khoom siv- suav nrog corrugated resin vov tsev pobzeb thiab PE-filled profiles.
PVC pelletizing tshuab- Tig PVC qhuav-sib xyaw rau hauv granules rau kev siv qis.

PVC board conical twin screw barrel for foam and marble sheet extrusion — Conical ntxaib ntsia hlau chim configured rau PVC board thiab ua npuas ncauj-ntawv extrusion.

Yuav ua li cas xaiv txoj cai conical twin ntsia hlau chim

Kev xaiv los mus rau peb lo lus nug: dab tsi cov khoom koj khiav, koj xav tau dab tsi, thiab abrasive yog koj formulation? Siv cov matrix hauv qab no ua qhov pib, tom qab ntawd paub meej tias qhov loj me rau koj lub tshuab.

Koj cov khoom / xav tau	Tswv yim configuration	Deg / khoom xaiv
Rigid PVC yeeb nkab & profile	Standard conical geometry loj rau koj extruder (xws li 55/110, 65/132)	Nitrided 38CrMoAlA kom huv si, tsis tshua muaj-filler PVC
PVC + siab CaCO₃ muab tub lim	Conical nrog cov khoom siv ntxiv dag zog, lossis nce mus rau qhov sib npaug sib npaug	Bimetallic / tungsten-carbide txheej (62 HRC) rau kev puas tsuaj
WPC / ntoo-fiber compounds	Conical nrog muaj zog venting thiab hnav tiv thaiv	Bimetallic - ntoo fiber ntau + fillers yog abrasive heev
PVC ua npuas ncauj board / ntawv	Conical tuned rau tswj melt kub thiab ruaj khov siab	Nitrided los yog bimetallic nyob ntawm qib muab tub lim
High tso zis rau tib hneev taw	Txoj kab uas hla loj dua thiab/lossis siv tau ntev dua	Match hardness khiav sij hawm thiab muab tub lim load

Txawm li cas los xij cov lus teb, ib kauj ruam tseem ceeb tshaj plaws yog txuam lub thoob rau koj lub tshuab uas twb muaj lawm. Conical qhov chaw yog cov kev cai zoo rau cov extruder uas lawv khiav hauv, yog li daim duab - los yog ib qho qauv nrog qhov loj me (pub / tuag txoj kab uas hla, nruab nrab qhov ntev, tag nrho ntev thiab flange cov ntsiab lus) - cia peb hais ib qho kev hloov pauv hloov tsis yog "kaw txaus". Yog tias koj xav tau tag nrho cov kab ntau dua li cov khoom siv, peb kuj tsimua tiav cov tshuab extruder.

Kev teeb tsa thiab kev teeb tsa cov kab ke

Lub thoob precision tsuas yog ua tau yog tias nws yog ntsia square, huv si thiab raug rhuab. Cov kauj ruam hauv qab no yog cov ntsiab lus dav dav - ib txwm ua raws li koj lub tshuab tsim cov ntawv qhia thiab cov txheej txheem kaw tawm.

Fais fab tuag & xauv tawm.Cais tus tsav thiab tag nrho cov tshuab cua sov ua ntej tshem lub thoob qub. Xyuas kom zero zog ua ntej koj pib.
Ntxuav lub ntsej muag mating.Tshem cov qub sealant, carbon thiab burrs los ntawm flanges thiab nrhiav lub ntsej muag kom lub tog zaum tshiab tsis muaj distortion.
Mount thiab sib dhos.Haum lub conical chim rau lub gearbox / feed vaj tsev, xyuas concentricity thiab hais tias cov screws tig dawb do los ntawm txhais tes ua ntej lub hwj chim yog thov.
Txuas cov cua sov zones.Reconnect band heaters thiab cua txias rau ib cheeb tsam (pub → compression → metering), thiab khub txhua lub thermocouple mus rau qhov tseeb tswj channel kom tsis muaj cheeb tsam hla.
Teem ib qhov profile ntub dej.Nqa lub thoob mus rau qhov kub thiab txias maj mam thiab cia nws ntub kom cov hlau thiab yaj sib npaug ua ntej koj pib cov ntsia hlau - pib txias txaus ntshai torque puas tsuaj.

Heater-zone tswv yim:ua kom qhov chaw pub khoom txias tshaj plaws thiab qib kub nce mus rau qhov tuag. Cov cheeb tsam tsis sib xws lossis ua tsis raug yog ib qho ntawm feem ntau ua rau muaj kev kub ntxhov thiab cov kab dub - tsim nyog kuaj xyuas ob zaug tom qab hloov pauv.

Kev daws teeb meem thiab hnav

Feem ntau cov teeb meem conical chim tshaj tawm lawv tus kheej li cov khoom tsis ruaj khov, overheating lossis degraded khoom. Siv lub rooj no txav nrawm los ntawm cov tsos mob uas yuav ua rau kho.

Cov tsos mob	Zoo li ua rau	Kho
Cov zis fluctuates / surging	Pub tsis sib xws, hnav ya davhlau, lossis kub drift	Txheeb xyuas cov khoom noj, txheeb xyuas thaj tsam temps, ntsuas cov ntsia hlau / chim tshem tawm
Kub kub	Cov cua kub tsis sib npaug, kev sib txhuam ntau dhau, lossis thaiv qhov txias	Tshawb xyuas txhua cheeb tsam thiab cua txias; rov ua daim ntawv qhia thermocouples
Plasticizing tsis zoo	Kev teeb tsa tsis raug ntsia hlau lossis lub tog raj kheej hnav	Tshawb xyuas kev teeb tsa; tshawb xyuas kom pom qhov loj ntawm kev hnav
Dub kab / streaks	Cov chaw tuag tuav cov khoom degraded, los yog qhab nia bore	Ntxuav thiab ntxuav kom huv si; soj ntsuam bore thiab ntsia hlau nto
Ntau dhau / nrawm hnav	Abrasive muab tub lim, kho tsis zoo, los yog tsis tshua muaj tshwj xeeb hardness	Txhim kho rau ib lub thoob bimetallic / tungsten-carbide; ceev ceev ceev

Hnav yog qhov qub - lub hom phiaj yog ua kom qeeb thiab kwv yees. Abrasive fillers (CaCO₃, ntoo fiber ntau, iav) tua lub bore thiab flights ceev tshaj plaws, uas yog vim li cas ib tug tob, nyuaj sab hauv txheej them rau nws tus kheej. Ib qho 62 HRC tungsten-ntxiv qhov chaw tsuas yog siv sijhawm ntev dua rau cov khoom sib txuas dua li tus qauv 58 HRC tiav, ncab lub sijhawm ntawm kev tsim kho dua tshiab.

Daim ntawv teev kev kho mob

Luv luv, tsis tu ncua kev kuaj xyuas kom tsis txhob raug nqi kim. Ua cov no rau hauv koj lub sijhawm:

Lub sijhawm	Tshawb xyuas	Kev ua
Txhua zaus	Zone kub & amps	Cov ntawv nyeem; tshawb nrhiav ib qho drift los ntawm lub hauv paus
Txhua lub lim tiam	Melt quality & nto tiav	Saib rau cov streaks tshiab, gels lossis cov zis hloov pauv
Txhua hli	Purge & visual bore / ntsia hlau check	Ntxuav cov chaw tuag; nrhiav kom tau qhab nia los yog tsis muaj xim
Peb lub hlis twg	Ntsia Hlau / chim clearance	Ntsuas qhov sib txawv; piv rau spec kom taug qab hnav tus nqi
Raws li xav tau	Cua sov & thermocouple kev ncaj ncees	Hloov cov bands ua tsis tiav / sensor ua ntej lawv ua rau cov khoom tsis zoo

Cov lus nug uas nquag nug

Dab tsi yog conical twin ntsia hlau chim?

Nws yog ib tug tapered ntxaib-bore extrusion tivthaiv nyob rau hauv uas ob conical screws tig nyob rau hauv ib tug txuam conical chim. Lub taper compresses thiab plasticizes cov khoom siv luv luv, ua rau lub conical ntsia hlau chim zoo tagnrho rau PVC yeeb nkab, profile, ntawv thiab WPC extrusion.

Cov ntaub ntawv twg yog nws zoo tshaj plaws siv rau?

Rigid PVC ( yeeb nkab, profile, board thiab ntawv), ntoo-yas composite, PE-raws li profiles thiab resin pobzeb, ntxiv rau PVC pelletizing. It handles low-bulk-density dry-blend powders especially well thanks to its large feed-end intake.

Yuav ua li cas yog nws txawv ntawm ib tug parallel twin ntsia hlau chim?

Lub conical chim tapers thiab tsim siab compression nrog maj mam shear, suiting ncaj qha PVC / WPC extrusion. Aparallel ntxaib ntsia hlau chimkhaws ib txoj kab uas hla tsis tu ncua thiab siab dua shear, uas suits compounding, masterbatch thiab high-filler formulations.

Dab tsi yog qhov kev tshem tawm ntawm cov ntsia hlau thiab lub thoob?

Clearance yog qhov sib txawv me me ntawm lub davhlau ya nyob twg thiab lub bore phab ntsa. Nws tau teem nruj thiab raug rau ntawm qhov tshiab; raws li nws qhib los ntawm hnav, tso zis thiab siab poob. Ntsuas nws ib ntus yog txoj hauv kev pom tseeb tshaj plaws los taug qab lub thoob hnav.

Yuav ua li cas rau nruab ib lub conical twin ntsia hlau chim?

Fais fab thiab kaw tawm, ntxuav lub ntsej muag mating, mount thiab ua kom zoo kom cov ntsia hlau tig dawb, xaim txhua qhov cua sov thiab cov thermocouple kom raug, tom qab ntawd nqa lub thoob mus rau qhov kub thiab txias thiab ntub nws ua ntej pib cov screws.

Dab tsi ua rau hnav hauv conical twin ntsia hlau chim?

Feem ntau abrasive fillers xws li calcium carbonate, ntoo fiber ntau thiab iav, ua phem dua los ntawm corrosion los ntawm PVC ua, kev tu tsis zoo thiab tsis tshua muaj zog. Ib txheej ntxaum bimetallic lossis tungsten-carbide tiv thaiv tag nrho peb qhov zoo dua.

Ntev npaum li cas yuav tsum tau kuaj xyuas lossis hloov lub thoob?

Ua qhov pom thiab tshem tawm cov tshev txhua hli thiab ntsuas kev tshem tawm txhua lub hlis twg. Lub sijhawm hloov pauv yog nyob ntawm qhov muab tub lim thiab cov sijhawm ua haujlwm - taug qab qhov kev coj ua tsis yog tos rau qhov ua tsis tiav, thiab rov tsim kho lossis hloov pauv ib zaug tshem tawm cov spec yav dhau los.

Kuv yuav xaiv qhov loj npaum li cas rau kuv txoj kab extrusion?

Sib piv txoj kab uas hla thiab qhov ntev rau koj tus qauv extruder thiab lub hom phiaj tso zis, tom qab ntawd xaiv qhov kev kho saum npoo raws li qhov ua rau koj cov formulation yog li cas. Xa ib daim duab lossis qauv nrog qhov loj me kom lub thoob yog qhov haum, tsis yog qhov kwv yees.

Xav tau ib lub conical twin ntsia hlau chim haum rau koj lub tshuab?

Xa koj daim duab rau peb - lossis ib qho qauv nrog qhov loj me - thiab peb cov engineers yuav spec ib qho tseeb-haum conical twin ntsia hlau thiab chim nrog txoj cai hardness rau koj cov khoom. Nrog rau hauv tsev nitriding, bimetallic thiab tungsten-carbide ua, peb tsim cov khoom uas ncav cuag 62 HRC hauv lub bore rau lub neej ntev.

Tau txais cov lus hais hauv 12 teev →

Nanhaiya (Zhoushan) Yas Machinery · 500+ cov neeg siv khoom thoob ntiaj teb ·ib leeg, conical ntxaib & parallel ntxaibntsia hlau chim