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: Ta'iala atoatoa i Fa'amatalaga, Talosaga & Filifiliga

2026-08-05 0 Tuu mai ia te au se savali

E ala i leNanhaiya Technical Team— Screw & Barrel Engineering, Zhoushan · Iloiloina mo le saʻo o falegaosimea · ~10 min faitau

Tali vave

O se pa'u sikulima konikika ose mea fa'apipi'i fa'apipi'i, fa'amea masaga fa'apipi'i lea e fa'ata'amilo ai fa'a sikulima se lua i totonu o se paelo fa'atusa. O le fa'asologa fa'ameamea e maua ai le fafaga malosi ma le fa'amalosi maualuga i se pu'upu'u umi, o le mafua'aga leasikulima masaga conical ma le paeloo le filifiliga masani mo paipa PVC, talaaga otooto, laupepa ma WPC extrusion.

Afai e te faʻatautaia se laina PVC poʻo laupapa-palasitika, o lepa'u sikuli masaga conicalo se tasi o vaega e sili ona sa'o e filifili ai lau gaosiga, fa'afefeteina lelei ma tau fa'agaoioiga. Filifili le lapo'a sese, meafaitino po'o le kilia ma e te totogia i le ofuina, otaota ma le taimi malolo. O lenei ta'iala o lo'o fa'aalia ai le fa'aogaina o se paelo sikulima, fa'amatalaga e taua pe ae fa'atau, pe fa'apefea ona ese mai sepaelo sikuli masaga tutusa, ma le auala e filifili ai, faʻapipiʻi ma tausia se tasi - tusia mai le vaaiga a se fale gaosi oloa e faʻaaogaina nei vaega i aso uma.

Conical twin screw barrel manufactured by Nanhaiya — O se fa'a sikuila masaga conical ma se seti paelo - o pu fa'apipi'i e maua ai le fa'amalosi pu'upu'u lelei mo le PVC fa'afefe vevela.

E fa'afefea ona fa'aogaina se paelo sikuli masaga conical

I le aextruder siku masaga conical, e lua fa'a sikulila e nonofo fa'atasi i se la'ititi la'ititi, lautele i le pito fafaga ma vaapiapi i le pito oti. O le paelo e fa'apipi'i e fa'atusa. A'o fealua'i mea mata mai le sone fafaga lapopo'a i le sone mita mita laiti, o le voluma fa'iti'iiti e fa'apipi'i ma palasitika a'o felauai ma fefiloi va'alele va'ava'ai. Talu ai ona o le fa'afeagai o fa'ailo e lua ma feso'ota'i atoa, o le sikulima masaga lua ma le paelo e toetoe lava a pei o se pamu fa'alelei lelei - fa'amautu le gaosiga i lalo, malu malu, e puipuia ai polymers fa'afefe vevela pei o le PVC.

O le faagasologa e vaevaeina i ni vaega se tolu:

Fafaga & momoli- o le tele o le fafaga fa'ai'u pito e maua ai le tele o le fa'aaogaina, o le mea lea e fa'afefiloi ai le pauta ma mea maualalo (pei o le PVC dry-blend) e tosoina ma le fa'atuatuaina e aunoa ma le fa'apipi'iina.
Fa'amau & fa'a'i'ila- o le taper e faʻaitiitia ai le leo o le alalaupapa i luga o le umi, faʻapipiʻi mea, ave i fafo le ea ma faʻafefeteina e ala i le tuʻufaʻatasia o le vevela ma galuega faʻainisinia.
Fua & lafoaia- o le vaapiapi vaapiapi sone e fausia ai se mamafa mautu ma tulei se toniga, faʻafefete tutusa i totonu o le mate i se fua faʻatonutonu.

E tele atu mea e fai e le paelo nai lo le fa'anofoina o fao. O lo'o tauaveina sone fa'avevela ma fa'alili o lo'o taofia vaega ta'itasi ile vevela sa'o. O paelo Nanhaiya e fa'aogaina le tele-sona fa'avevela ma fa'alili - e masani lava ona fafaga, fa'amalosi ma sone homogenization - fa'atasi ai ma le fa'amalo fa'amalo e toso mai ai le susu ma le fa'afefe mai le liusuavai, lea e taua mo mea fa'atumu ma hygroscopic.

Fa'amatalaga autu e siaki ae e te le'i fa'atau

E lua paelo conical e mafai ona foliga tutusa ma e matua ese lava le faatinoga. O faʻamatalaga ia e filifili ai le fetaui, gaosiga ma le ola ola - o numera e tatau ona e faʻamaonia i luga o soʻo se upusii.

Mea fa'apitoa	O lona uiga	Aisea e taua ai
Fuafuaga o le lapoa	O le fafaga-mu'u / oti-pito lautele, eg. 45/90, 50/105, 55/110, 65/132, 80/156, 92/188 mm	Seti le vasega o masini ma le vaega fa'aulu - e tatau ona fetaui tonu ma lau fa'ata'ita'iga extruder
L/D fua faatatau	Fa'atino lelei umi ma le lautele	Umia aoga umi = sili atu taimi nofomau mo fusuaga atoa ma degassing
Meafaitino togi	38CrMoAlA u'amea nitrided, W6Mo5Cr4V2, HIP pauta uamea, po'o le bimetallic	Tu'u sa'o le fa'aogaina o le ola ma le fa'a'ele'ele mai mea fa'atumu/PVC
Togafitiga i luga ma le maaa	Nitriding, chrome plateing, bimetallic alloy po'o le tungsten-carbide spray	Na fa'asusu e Nanhaiya se mea fa'apipi'i fa'apipi'i tungsten e o'o atu ai62 HRCtotonu ole paelo ma le 58 HRC masani
Alloy layer loloto	O le mafiafia o le fa'alava totonu e fa'alavalava	E 2.5–3 mm le pito lua a Nanhaiya—o se vaega loloto o lona uiga o se faamalama o auaunaga umi atu
Kilia le siu/paila	O le va i le va o le pito o le vaalele ma le puipui fa'amau	Tele tele = mamafa gau ma maualalo le gaosiga; ose va fufusi, sa'o sa'o e fa'atumauina ai le lelei maualuga
Fa'apalepale/fa'asa'o	Sa'o lelei o masini o le vaega ua mae'a	O Nanhaiya o lo'o u'u pa'u masaga conical i le ±0.0005 mm mo se fa'afetauiga faifaipea
Gaosi mea e maua (kg/h)	Fa'avasegaina le fa'aogaina mo le tele	Ole numera ole fa'atauga pito i lalo - fa'afetaui i lau laina saoasaoa ma lau oloa

Fa'amatalaga lautele alamanuia:fa'ailoga lapopoa conical e pei ole 45/90 po'o le 65/132 (fafaga/mate diameter i mm) e taatele i SJZ-ituaiga masini conical, o lea o se paelo ua faamaoti mai i lenei auala e masani ona fetaui ma se extruder o iai. Fa'amaonia i taimi uma se ata po'o se fa'ata'ita'iga a'o le'i oka. E mafai ona e vaʻai i lapopoa masani i la matoupa'u sikuli masaga conicalitulau.

Conical vs tutusa twin screw paelo

Ole fesili masani a tagata fa'atau e fesili pe latou te mana'omia se conical po'o sepaelo sikuli masaga tutusa. O mea uma e lua e lua-screw, intermesh uma - ae o le geometry e fetaui ma galuega eseese. I se faapuupuuga: sili conical i tuusao PVC / WPC extrusion o paipa, talaaga otooto ma laupapa; e sili atu le malosi o le parallel mo le faʻapipiʻiina, masterbatch ma faʻapipiʻi maualuga tele.

Fa'ailoga	Pa'u fa'aisi fa'ailoga masaga conical	paelo sikuli masaga tutusa
Fafaga amio	Tatala fafaga lapopoa - sili atu le taumafa mo le pauta maualalo-tele	Fa'ato'aga fafaga mo le fa'afefiloi ma pellet fafaga
Fa'amau	O'omiga maualuga ua fausia i totonu o le fa'ailoga fa'ai'opo	Sili atu fa'amalosi fa'aauau i luga o le lautele fa'amautu
Avela/sele	Fa'alelei, pulea lelei - lelei mo PVC fa'afefe vevela	Silia maualuga - sili atu mo le faʻafefiloi malosi ma faʻasalalau
Fa'aoga masani	PVC paipa, talaaga otooto, pepa, WPC, resin tile	Masterbatch, tuufaatasia, maualuga-CaCO₃ ma galuega e tumu i tioata
Tausiga	La'ei ma kilia e mana'omia le mata'ituina lelei ile taper	E masani ona faigofie le fa'avasegaina o le geometry ma le suia o elemene

O se tulafono aoga o lima matua: pe afai o lau oloa faaiuoo le extrudate (se paipa po o se laupapa saʻo mai le mate), o se conical masaga sikulima paelo e masani lava o le meafaigaluega saʻo. Afai o lo'o e faia pelleti pe fa'asalalauina se afifi fa'aopoopo fa'aopoopo, va'ai i se paelo sikulima masaga fa'atusa - ae maise lava le ituaiga fa'asagatau mo uta maualuga kabone. Le mautinoa po o fea e fetaui ma lau laina? O tatoufa'ato'a fa'ailoga, kosi ma laina tutusa o loʻo faʻaalia uma i luga o leitulau oloa.

Talosaga masani

Talu ai e tuʻufaʻatasia le fafagaina malosi, faʻamalosi maualuga ma sele malu, o le sikulima masaga conical ma le paelo o le workhorse o malo-PVC ma laupapa-palasitika extrusion. E sili ona lelei mo:

PVC paipa- sapalai vai, alavai ma paipa paipa mai le PVC fa'afefiloi mago.
PVC talaaga- fa'amalama ma faitoto'a fa'amatalaga, fa'amau fa'ai'u ma teuteu.
laupapa PVC & laupepa— laupapa foam, pepa maamora foliga ma laupapa foa'i fua (silasila i le matouPVC laupapa conical masaga sikulima paelo).
WPC (fa'apipi'i laupapa-palasitika)- fa'aofuofu, puipui puipui ma tala'aga mai fa'aputu fa'atumu fafie.
mea fa'avae PE ma resin-tile- e aofia ai maa fa'a'a'au fa'a'ele'ele taualuga ma PE-tumu fa'amatalaga.
PVC pelletizing- liliu le PVC fa'afefiloi mago i granules mo le fa'aoga i lalo.

PVC board conical twin screw barrel for foam and marble sheet extrusion — Fa'ato'a fa'ato'a pa'u fa'amasani fa'amasani mo le laupapa PVC ma le fa'a'ese'ese o le foam-sheet.

E fa'afefea ona filifili le pa'u sikuli masaga conical sa'o

Filifiliga e sau i lalo i fesili e tolu: o le a le mea o loʻo e faʻaogaina, o le a le mea e te manaʻomia, ma le faʻafefe o lau faʻavae? Fa'aoga le matrix o lo'o i lalo e fai ma amataga, ona fa'amaonia lea o le tele sa'o i lau masini.

Au mea / mana'oga	Fuafuaga fautuaina	Filifiliga i luga / meafaitino
Pipa PVC ma'a'a & fa'ailoga	Fa'ata'ita'iga conical fa'ata'atia e fa'atatau i lau fa'ameamea (fa'ata'ita'iga 55/110, 65/132)	Nitrided 38CrMoAlA mo PVC mama, maualalo faʻatumu
PVC + maualuga CaCO₃ faʻatumu	Conical fa'atasi ai ma sone fa'aofuofu fa'amalosi, po'o le la'a i luga i le fa'asaga tutusa	Bimetallic / tungsten-carbide layer (62 HRC) mo le abrasion
WPC / fa'apipi'i fa'alava-fafie	Conical ma le malosi e savili ma ofuina puipuiga	Bimetallic - alava fafie + faatumu e matua abrasive
PVC foam laupapa / pepa	Fa'alogoina fa'amau mo le fa'atonutonuina o le vevela o le liusuavai ma le mamafa mautu	Nitrided po'o le bimetallic fa'alagolago ile maualuga ole fa'atumu
Tulaga maualuga i tulagavae tutusa	Ole fua fa'atatau ole lautele ma/po'o le umi ole umi aoga	Fa'afetaui le maaa ma itula ta'avale ma uta fa'atumu

Po o le a lava le tali, o le laasaga e tasi e sili ona taua o le fetaui ma le paelo i lau masini o loʻo iai. O vaega conical e masani lelei i le extruder latou te tamoe i totonu, o lea o se ata - poʻo se faʻataʻitaʻiga faʻatasi ai ma itu taua (fafaga / oti le lautele, mamao ogatotonu, umi atoa ma faʻamatalaga flange) - e mafai ona tatou sii maia se sui saʻo-saʻo nai lo se "latalata" vaega. Afai e te manaʻomia le laina atoa nai lo le vaega, matou te fausia foimasini extruder atoatoa.

Fa'apipi'i ma fa'avae uaea

O se paelo sa'o e fa'atino pe a fa'apipi'i sikuea, mama ma fa'asa'o lelei. O laasaga o loʻo i lalo o se vaʻaiga lautele - mulimuli i taimi uma i lau masini fau tusi tusi ma taʻaloga loka.

Malosi i lalo ma loka i fafo.Fa'ate'a ese le ta'avale ma mea fa'avevela uma a'o le'i aveese le paelo tuai. Fa'amaonia le leai o le malosi ae e te le'i amataina.
Fa'amama foliga fa'aipoipo.Aveese sealant tuai, carbon ma burrs mai flanges ma su'e foliga ina ia nofo ai le paelo fou e aunoa ma se fa'alavelave.
Fa'amau ma fa'aoga.Fa'apipi'i le paelo fa'amau i le atigipusa/fa'ameamea, siaki le fa'atotonuga ma ia fa'aliu sa'o le fa'avili i lima a'o le'i fa'aogaina le paoa.
Uaea sone faavevela.Toe fa'afeso'ota'i mea fa'avevela ma fa'alili i le sone (fafaga → compression → mita), ma fa'alua fa'ameamea ta'itasi i le ala sa'o e pulea ina ia leai se sone e feso'ota'i.
Seti se talaaga fa'asusu.Fa'atu le paelo i le vevela lemu ma fa'asusu i le sila ma fa'afefeteina ae e te le'i amataina le fa'avili - amata ai le malulu e ono fa'aleagaina ai.

Fautuaga o sone vevela:fa'amalie le sone fafaga ma la'a i luga le vevela i le pa'u. O sone e le tutusa pe fa'asalaina ose tasi lea o mafua'aga masani o le si'isi'i ma le lanu uliuli - e tatau ona siaki fa'alua pe a mae'a suiga o paelo.

Fa'afitauli ma ofuina

O le tele o fa'afitauli paelo e fa'ailoa mai o latou lava e le mautu, fa'avevela po'o mea leaga. Fa'aoga le laulau lenei e fa'atopetope ai mai fa'a'ailoga e ono mafua ai ona toe fa'aleleia.

Fa'ailoga	Atonu e mafua ai	Fa'atonu
E fesuisuia'i / fa'atupuina	Fafaga le fetaui, va'alele vaivai, po'o le vevela o le vevela	Siaki mea'ai, fa'amaonia le vevela o le sone, fua le kilia o sikulima/paila
Ova le vevela	E le paleni le fa'avevela, fe'ese'esea'i tele, po'o le maalili ua poloka	Su'esu'e sone ta'itasi ma ta'amilosaga malulu; toe fa'afanua thermocouple
Le lelei le fa'apipi'iina	Sese le seti sikulima po'o se pa'u paelo masaesae	Fa'amaonia le fa'atulagaina; siaki mo le kilia tele mai le ofuina
Laina uliuli / laina	O mea mate o lo'o uuina ai mea leaga, po'o ni togi	Faʻamama ma faʻamama lelei; su'esu'e le va'a ma le fa'avili
La'ei tele/vave	Fa'atumu abrasive, le lelei le tausiga, po'o le maaa o lalo ole fa'amatalaga	Fa'aleleia i se paelo bimetallic / tungsten-carbide; fa'amalosi le tausiga

O laei e masani lava - o le sini o le faʻagesegese ma faʻamaonia. O mea fa'atumu (CaCO₃, alava laupapa, tioata) e sili ona osofa'ia le va'a ma va'alele, ma o le mea tonu lava lea e totogi ai e se vaega loloto, malō mo ia lava. O le 62 HRC fa'aopoopo i luga o le tungsten e sili atu ona umi e fa'asaga i na fa'aputuga nai lo le fa'auma masani 58 HRC, fa'alautele le va i le va o le toe fau.

Lisi siaki tausiga

O siaki masani pupuu e puipuia ai le taugata. Fausia mea nei i lau masani:

Vaeluaga	Siaki	Gaioiga
Soo se sifi	Sone vevela & amps	Faitauga o ogalaau; su'esu'e so'o se fa'ase'e mai le laina fa'avae
Vaiaso	Lelei liusuavai & mae'a luga	Va'ai mo fa'ailoga fou, gels po'o suiga o mea e gaosia
Ta'i masina	Fa'amama & va'ai va'a/siu siaki	Faʻamama nofoaga mate; va'ava'ai mo sikoa po'o le fa'ailoga
Kuata	Kilia le siu/paila	Fua le va; fa'atusatusa i fa'amatalaga e siaki le fua o le ofuina
Pe a manaomia	Fa'avevela ma le thermocouple amiosa'o	Suia fusi/seni ua le manuia a'o le'i mafua ai le leaga o oloa

Fesili e fai soo

O le a le paelo sikuli masaga conical?

Ose vaega fa'amea fa'amea masaga fa'a'opo'opo lea e fa'ata'amilo ai fa'a sikulima se lua i totonu o se paelo fa'atusa. O le taper compresses ma plasticizes mea i luga o se umi puupuu, faia le conical sikulima paelo lelei mo PVC paipa, talaaga otooto, laupepa ma extrusion WPC.

O a mea e fa'aoga lelei ai?

PVC malo (paipa, fa'amatalaga, laupapa ma laupepa), laupapa-palasitika tu'ufa'atasi, fa'amatalaga fa'avae PE ma ta'i resini, fa'atasi ai ma pelletizing PVC. Na te fa'aogaina pa'u fa'afefiloi matutu-maulalo-maualalo aemaise lava fa'afetai i le tele o mea'ai fa'ai'u.

E fa'afefea ona ese mai se paelo sikulima masaga tutusa?

Ose paelo fa'amau ma fau le fa'amalosi maualuga ma sele malu, fa'afetaui sa'o PVC/WPC extrusion. Apaelo sikuli masaga tutusae fa'atumauina pea lona lautele ma sele maualuga, e fetaui lelei i le fa'afefiloi, masterbatch ma fa'atumu maualuga tele.

O le a le kilia masani i le va o sikuli ma le paelo?

O le kiliaina o le va itiiti lea i le va o le pito o le vaalele ma le pa puipui. Ua fa'apipi'i mau ma sa'o i se vaega fou; a'o matala i luga mai le ofuina, gaosiga ma le pa'u o le mamafa. O le fuaina mai lea taimi i lea taimi o le auala sili lea ona manino e siaki ai le ofuina o paelo.

E fa'afefea ona ou fa'apipi'i se pa'u sikula masaga conical?

Malosi i lalo ma loka i fafo, fa'amama foliga fa'aipoipo, fa'anofo ma fa'aoga'i ina ia mafai ona liliu sa'o le fa'avili, uaea sone fa'avevela ta'itasi ma le thermocouple sa'o, ona fa'ae'e lemu le paelo i le vevela ma fa'asusu a'o le'i amataina fa'avili.

O le a le mea e mafua ai ona ofuina i paʻu sikuli masaga conical?

Fa'atosina abrasive fillers e pei o le calcium carbonate, fiber fafie ma tioata, e sili atu ona leaga e ala i le pala mai le gaosiga o le PVC, le lelei o le tausiga ma le maaa. E sili atu le loloto o le bimetallic poʻo le tungsten-carbide layer e tetee atu ai i mea uma e tolu.

E fa'afia ona asiasia pe sui le paelo?

Fai siaki va'aia ma fa'amama i masina ta'itasi ma fua kilia ta'i kuata. O le taimi e sui ai e fa'alagolago i le fa'atumu o uta ma itula ta'avale - siaki le faiga o la'ei nai lo le fa'atali mo se fa'aletonu, ma toe fau pe sui pe a o'o atu le kilia i tua atu o fa'amatalaga.

E fa'afefea ona ou filifilia le lapo'a sa'o mo la'u laina fa'aola?

Fa'afetaui le fua fa'atatau o le lautele ma le umi i lau fa'ata'ita'iga extruder ma le fa'amoemoega o mea e fai, ona filifili lea o se togafitiga i luga ole laiga e fa'atatau i le fa'afefeteina o lau fau. Auina atu se ata po'o se fa'ata'ita'iga e iai fua fa'atatau ina ia fetaui tonu le paelo, ae le o se fa'atatau.

Mana'omia se pa'u sikula masaga conical e fetaui ma lau masini?

Auina mai ia i matou lau ata - poʻo se faʻataʻitaʻiga e iai fua faʻatatau - ma o matou inisinia o le a faʻamaonia se faʻailoga masaga masaga ma le paelo e fetaui tonu ma le maaa saʻo mo au mea. Faatasi ai ma le faʻaogaina o le nitriding i totonu o le fale, bimetallic ma tungsten-carbide, matou te fausia vaega e oʻo atu i le 62 HRC i totonu o le pa mo le umi o le ola tautua.

Maua se upusii i totonu ole 12 itula →

Nanhaiya (Zhoushan) masini palasitika · 500+ tagata fa'atau i le lalolagi atoa ·nofofua, masaga conical & masaga tutusasikuli paelo