What is a conical twin screw barrel for PVC?

It is a tapered twin-screw plasticizing unit used to extrude rigid and soft PVC into pipe, profile, board and sheet. The conical geometry feeds light PVC powder well and compresses it gently, protecting heat-sensitive PVC while delivering steady output.

Is the same conical barrel used for PVC pipe, board and sheet?

The conical geometry is the same, but the ideal screw profile, output and surface treatment differ. Pipe favours steady metering; foam board runs higher filler and needs stronger wear protection; sheet varies by formula. Each is specified to the product and machine.

Which conical barrel size do I need for PVC pipe?

It depends on pipe diameter and target output. Small pipe and profile often use 45/90–55/110, general PVC pipe around 65/132, and large-diameter pipe steps up to 80/156 or 92/188. Match the size to your extruder model.

Should a PVC conical barrel be nitrided or bimetallic?

Clean, low-filler PVC can run nitrided. Heavily filled formulas — most foam board and mineral-filled sheet — should be bimetallic, because a thick tungsten-added alloy layer resists the abrasion and corrosion of filled PVC far longer.

What causes fast wear in PVC conical barrels?

Mainly calcium-carbonate filler (abrasion) combined with corrosion from HCl released during PVC processing. High filler levels and poor maintenance accelerate it. A bimetallic, tungsten-carbide-reinforced surface resists both far better than a thin nitrided case.

Can one conical twin screw extruder make both pipe and board?

Yes, with the right screw and downstream tooling a conical extruder can switch between PVC products, though a barrel and screw optimised for one job give the best results. Heavily filled board benefits from a bimetallic barrel even if the same machine also runs pipe.

What extruder brands do conical barrels fit?

Conical barrels are commonly matched to popular brands such as JWELL, LIANSU, KANGDA, Battenfeld-Cincinnati (CM/CMT series) and Krauss Maffei (KMD series). Confirm your exact machine model, or send a drawing, so the barrel is an exact fit.

How do I order the right conical twin screw barrel for my PVC line?

Send your product and formula (with filler level), extruder brand/model or a drawing, target output, and run conditions. With those, we can specify the correct size, screw profile and surface treatment and quote within 12 hours.

Qhov twg Conical Twin Screw chim rau PVC? Yeeb vs Board vs Sheet

2026-08-09 0 Tso lus rau kuv

Los ntawm Nanhaiya Technical Team— Ntsia Hlau & Barrel Engineering, Zhoushan · Tshuaj xyuas rau lub Hoobkas raug · ~ 9 min nyeem

Teb ceev

PVC yeeb nkab, pawg thawj coj saib thiab daim ntawv txhua tus khiav ntawm lub conical twin ntsia hlau chim, tab sis txoj cai yog txawv ntawm cov ntsia hlau profile, tso zis thiab - feem ntau ntawm tag nrho cov - hnav tiv thaiv. Cov yeeb nkab haum rau qhov tso zis thiab siab; ua npuas ncauj board thiab daim ntawv khiav ntau dua muab tub lim thiab xav tau muaj zog abrasion kuj. Tau qhov loj me kom phim koj cov extruder, ces xaiv nitrided los yog bimetallic raws li ntau npaum li cas muab koj cov mis nyuj.

PVC yeeb nkab, PVC board thiab PVC ntawv yog peb txoj haujlwm loj tshaj plaws rau ib qhoconical twin ntsia hlau chim- thiab cov neeg yuav khoom feem ntau xav tias ib lub thoob npog tag nrho peb. Nws yuav luag ua: lub conical ntxaib ntsia hlau thiab chim yog lub tshuab zoo rau txhua qhov nruj-PVC extrusion. Tab sis cov ntsia hlau profile, cov ntaub ntawv tso tawm thiab kev kho saum npoo uas haum rau PVC yeeb nkab tsis zoo ib yam li qhov xav tau ntawm lub rooj tsavxwm ua npuas ntau. Phau ntawv qhia no taug kev los ntawm txhua yam khoom, tom qab ntawd qhia qhov loj me thiab qhia qhov yog.

Conical twin screw barrel for PVC board, pipe and sheet extrusion

PVC yeeb nkab conical twin ntsia hlau chim

PVC yeeb nkab yog daim ntawv thov conical classic. Cov kab khiav nruj PVC qhuav-kib, feem ntau nrog lub teeb-rau-nruab nrab calcium carbonate, thiab qhov tseem ceeb tshaj plaws yog cov zis ruaj khov thiab khov khov siab kom cov phab ntsa tuab nyob ib puag ncig ntawm cov yeeb nkab. Lub conical ntsia hlau thoob tuav qhov zoo no: cov khoom noj loj kawg rub rau hauv cov hmoov sib tov, thiab cov nplaum nplaum ua kom zoo ib yam, tsis tshua muaj shear yaj uas tiv thaiv tshav kub-sensitive PVC.

Rau PVC yeeb nkab conical twin ntsia hlau chim, ua ntej:

Kev ntsuas tsis tu ncua- ib tug ntsia hlau profile tuned rau khov kho siab thiab tso zis.
Sizing rau cov zis- qhov loj dua qhov sib piv rau cov yeeb nkab loj dua (ntau dua ntawm qhov loj me hauv qab).
Hnav tiv thaiv kom phim muab tub lim- nitrided rau cov qauv huv si, bimetallic ib zaug CaCO₃ nce.

Saib pebconical twin ntsia hlau chimntau yam rau cov yeeb nkab configurations, los yog siab dua-throughputPVC yeeb nkab parallel ntsia hlau chimyog tias koj khiav ib kab sib luag.

PVC board conical twin ntsia hlau chim

PVC board - tshwj xeeb tshaj yog ua npuas ncauj board thiab dawb-foam board - yog ib txoj hauj lwm xav tau ntau dua. Formulations feem ntau nqa ntau dua muab tub lim, thiab foaming ntxiv rhiab heev rau yaj kub thiab siab stability, vim hais tias tsis sib xws tej yam kev mob tshwm sim raws li inconsistent cell qauv thiab ceev. APVC board conical twin ntsia hlau chimyog li ntawd tsim nyob ib ncig ntawm kev tswj qhov kub thiab txias, venting zoo thiab muaj zog hnav tsis kam tshaj li cov yeeb nkab huv si xav tau.

Cov muab tub lim siab dua txhais tau tias yog kev puas tsuaj, yog li lub rooj tsavxwm cov thoob yog qhov kev tiv thaiv bimetallic pib khwv tau nws khaws cia - tungsten-ntxiv alloy txheej tiv thaiv cov calcium carbonate uas yuav zom los ntawm cov ntaub ntawv nyias nitrided kom nrawm dua ntawm cov kab ua npuas dej.

PVC ntawv conical twin ntsia hlau chim

PVC daim ntawv - los ntawm daim ntawv nyias nyias mus rau marble-zoo thiab mos PVC daim ntawv - zaum ntawm cov yeeb nkab thiab board nyob rau hauv nws xav tau. Cov zis uniformity drives nto zoo thiab thickness kam rau ua nyob rau hauv lub web, yog li ib tug ruaj khov, zoo-homogenised yaj yog qhov tseem ceeb. Filler qib sib txawv los ntawm cov khoom, uas yog vim li cas qhov kev xaiv kev kho deg tseem ceeb: daim ntawv marble-zoo nrog cov ntxhia pob zeb hnyav xav tau kev tiv thaiv bimetallic, thaum daim ntawv huv huv tuaj yeem khiav zoo siab ntawm nitrided.

Vim hais tias daim ntawv formulations txawv heev, ib daim ntawv PVC conical twin ntsia hlau chim yog yuav luag ib txwm teev rau pes tsawg tus qauv thiab kab - tsis muaj ib "daim ntawv chim". Qhia koj cov khoom thiab cov qib muab tub lim thiab cov ntsia hlau profile thiab qhov chaw tuaj yeem sib phim rau nws.

PVC yeeb nkab vs board vs ntawv: dab tsi hloov

Qhov xwm txheej	PVC cev	PVC board (ua npuas ncauj)	PVC ntawv
Ua ntej	Cov zis ruaj khov & siab	Melt-temp tswj & cell uniformity	Output uniformity & thickness
Hom muab tub lim	Lub teeb – nruab nrab CaCO₃	Siab muab tub lim	Nws txawv ntawm qhov khoom
Ntsia hlau tsom	ruaj khov metering	Tswj temp & venting	Zoo homogenization
Kev kho saum npoo	Nitrided los yog bimetallic	Bimetallic nyiam	Nyob ntawm qib filler
Khoom nplooj	Conical ntau yam	PVC lub tog raj kheej	Conical ntau yam

Lub takeaway: geometry nyob twj ywm conical rau tag nrho peb, tab sis raws li koj txav los ntawm cov yeeb nkab huv si mus rau hauv lub rooj tsavxwm ua npuas ncauj, hnav tiv thaiv los ua tus txiav txim spec.

Sizing thiab tshuab compatibility

Conical chim yog tsim los rau tus qauv loj tsim - pub thiab tuag diameters hauv millimeters. Ua raws li qhov loj me rau koj lub extruder thiab koj lub hom phiaj tso zis:

General kev lag luam ceeb toom:Feem ntau conical ntau thiab tsawg khiav los ntawm 45/90 thiab 51/105 (me me profile thiab yeeb nkab) mus txog 55/110 thiab 65/132 (tshwj xeeb PVC yeeb nkab thiab profile) mus txog 80/156 thiab 92/188 (loj-inch yeeb nkab), nrog rau ntau qhov nruab nrab xws li 55/120, 20, 70/140 thiab 80/143. Conical chim kuj feem ntau sib phim rau cov npe nrov extruder - piv txwv li JWELL, LIANSU, KANGDA, Battenfeld-Cincinnati (CM / CMT series) thiab Krauss Maffei (KMD series). Nco ntsoov paub meej tias koj lub tshuab qauv thaum xaj.

Tau txais qhov loj me yog tsis sib tham tau: lub conical chim yog zoo kev cai rau lub tshuab nws sau nyob rau hauv, yog li cov pub / tuag txoj kab uas hla, nruab nrab nrug, tag nrho ntev thiab flange cov ntsiab lus yuav tsum phim koj extruder raws nraim. Rau lub tshuab nws tus kheej, saib pebntxaib ntsia hlau extruderntau thiab ua tiavextruder tshuab.

Nitrided los yog bimetallic rau PVC?

Qhov no yog qhov kev xaiv uas feem ntau cuam tshuam ntev npaum li cas PVC lub thoob kav ntev. Nyob rau hauv luv luv: huv si, low-filler PVC tuaj yeem khiav nitrided; hnyav hnyav PVC - feem ntau ua npuas ncauj board thiab ntxhia-filled ntawv - yuav tsum yog bimetallic. PVC yog ob qho tib si abrasive (los ntawm muab tub lim) thiab corrosive (HCl tso tawm ntawm thermal decomposition), yog li ntawm kev thov cov qauv txheej txheej tuab, tawv alloy them rov qab los ntawm kev ua haujlwm ntev dua.

Nanhaiya txau cov tungsten-ntxiv hard alloy nyob ib ncig ntawm qhov yooj yim-hnav seem ntawm lub thoob, ncav cuag62 HRCsab hauv lub bore - piv rau ib qho 58 HRC - nrog 2.5-3 mm alloy txheej. Peb tsim cov no ntawm 38CrMoAlA, W6Mo5Cr4V2 lossis HIP hmoov-steel lub cev. Rau kev sib piv tag nrho, saib peb phau ntawv qhia txog kev xaiv ntawm abimetallic conical twin ntsia hlauthiab txheem nto.

Yuav ua li cas thiaj li txoj cai conical chim rau PVC

Txhawm rau kom tau txais ib lub thoob haum es tsis yog qhov kwv yees, xa peb:

Khoom & formula- yeeb nkab, board lossis ntawv, ntxiv rau hom thiab qib (piv txwv li CaCO₃ loading).
Tshuab cov ntsiab lus- extruder hom / qauv, lossis kos duab nrog pub / tuag txoj kab uas hla, nruab nrab nrug, ntev thiab flange.
Lub hom phiaj tso zis- kg / h thiab kab nrawm, yog li cov ntsia hlau profile thiab qhov sib tw loj.
Khiav tej yam kev mob- teev ib hnub twg thiab cov mis abrasive zoo li cas, yog li peb pom zoo kom nitrided lossis bimetallic ncaj ncees.

Nrog rau plaub qhov kev tawm tswv yim no, peb cov kws tsim khoom tuaj yeem hais lub conical ntsia hlau chim rau koj cov kab PVC hauv 12 teev.

Cov lus nug uas nquag nug

Dab tsi yog conical twin ntsia hlau chim rau PVC?

Nws yog ib tug tapered twin-ntsia hlau plasticizing tsev siv los extrude nruj thiab mos PVC rau hauv cov yeeb nkab, profile, board thiab ntawv. Lub conical geometry pub lub teeb PVC hmoov zoo thiab compresses nws maj mam, tiv thaiv tshav kub-rhiab PVC thaum xa cov zis tsis tu ncua.

Puas yog tib lub conical chim siv rau PVC yeeb nkab, board thiab ntawv?

Lub conical geometry yog tib yam, tab sis qhov zoo tagnrho ntsia hlau profile, cov zis thiab kev kho deg txawv. Cov yeeb nkab haum metering ruaj khov; foam board khiav ntau dua muab tub lim thiab xav tau kev tiv thaiv hnav zoo dua; daim ntawv sib txawv ntawm cov qauv. Txhua yam yog teev rau cov khoom thiab tshuab.

Qhov twg conical chim kuv xav tau rau PVC yeeb nkab?

Nws nyob ntawm cov yeeb nkab txoj kab uas hla thiab lub hom phiaj tso zis. Cov yeeb nkab me me thiab qhov profile feem ntau siv 45/90-55/110, dav PVC yeeb nkab nyob ib ncig ntawm 65/132, thiab cov yeeb nkab loj loj nce mus txog 80/156 lossis 92/188. Muab qhov loj me rau koj tus qauv extruder.

Yuav tsum PVC conical chim yog nitrided los yog bimetallic?

Huv si, tsis tshua muaj neeg sau PVC tuaj yeem khiav nitrided. Cov qauv hnyav hnyav - feem ntau cov ntawv ua npuas dej thiab cov ntawv sau cov ntxhia - yuav tsum yog bimetallic, vim tias cov txheej tuab tungsten-ntxiv alloy tiv thaiv kev puas tsuaj thiab corrosion ntawm PVC kom ntev dua.

Dab tsi ua rau hnav ceev ceev hauv PVC conical chim?

Feem ntau calcium-carbonate muab tub lim (sib tsoo) ua ke nrog corrosion los ntawm HCl tso tawm thaum lub sij hawm ua PVC. Cov qib siab muab tub lim thiab kev saib xyuas tsis zoo ua kom nws nrawm. Ib qho bimetallic, tungsten-carbide-reinforced nto tiv thaiv ob qho tib si deb zoo dua li cov ntaub ntawv nyias nitrided.

Puas yog ib qho conical ntxaib ntsia hlau extruder ua ob lub yeeb nkab thiab board?

Yog lawm, nrog txoj cai ntsia hlau thiab cov cuab yeej qis qis ib qho conical extruder tuaj yeem hloov pauv ntawm cov khoom siv PVC, txawm tias lub thoob thiab ntsia hlau optimized rau ib txoj hauj lwm muab cov txiaj ntsig zoo tshaj plaws. Hnyav puv board tau txais txiaj ntsig los ntawm ib lub thoob bimetallic txawm tias tib lub tshuab tseem khiav cov yeeb nkab.

Dab tsi extruder hom ua conical chim haum?

Conical chim feem ntau sib phim rau cov npe nrov xws li JWELL, LIANSU, KANGDA, Battenfeld-Cincinnati (CM / CMT series) thiab Krauss Maffei (KMD series). Paub meej tias koj lub tshuab ua qauv, lossis xa daim duab kos, yog li lub thoob yog qhov haum.

Yuav ua li cas kuv thiaj li txoj cai conical twin ntsia hlau chim rau kuv PVC kab?

Xa koj cov khoom thiab cov qauv (nrog rau qib muab tub lim), extruder hom / qauv lossis kos duab, lub hom phiaj tso zis, thiab ua haujlwm. Nrog rau cov no, peb tuaj yeem qhia qhov tseeb qhov loj me, ntsia hlau profile thiab kho qhov chaw thiab hais lus hauv 12 teev.

Tau txais ib lub conical twin ntsia hlau chim haum rau koj cov khoom PVC

Qhia rau peb seb koj puas khiav PVC yeeb nkab, board lossis ntawv, koj qib muab tub lim thiab koj tus qauv extruder - peb cov engineers yuav qhia qhov loj me, ntsia hlau profile thiab nto. Rau cov ntawv ntim PVC, peb cov tungsten-ntxiv bimetallic chim 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 ·conical & thaum uas tig musob lub taub hau ntsia hlau,PVC lub tog raj kheejs & extruder tshuab