What is a parallel twin screw barrel?

It is a twin-bore barrel holding two constant-diameter intermeshing screws that run side by side. Unlike a conical barrel, the screws stay the same size end to end and the system is usually segmented, so the screw profile can be reconfigured for different formulations.

What is the difference between co-rotating and counter-rotating?

Co-rotating screws turn the same way and give high-shear mixing at high speed — ideal for compounding and masterbatch. Counter-rotating screws turn oppositely with gentler, pump-like conveying — better for PVC and heat-sensitive, high-filler work.

What is a segment (building-block) parallel twin screw barrel?

It is a modular design where the barrel is bolt-together sections and the screw is keyed elements on a shaft. You can position feed, mixing, vent and metering sections as the recipe needs, and replace only the worn segment instead of the whole screw.

Parallel or conical twin screw barrel — which do I need?

Choose conical for direct PVC pipe, profile, board and sheet extrusion. Choose parallel for granulation, compounding, masterbatch and very high-filler or glass-fibre dispersion, where reconfigurable mixing matters most.

What is a parallel twin screw barrel used for?

Mainly granulation and pelletizing, compounding and masterbatch, PS foaming, aluminum-plastic composite panel, rubber and plastic, and parallel-layout PVC lines. The tunable screw profile lets one machine handle many recipes.

Should a parallel barrel be nitrided or bimetallic?

Clean compounds can run nitrided. Abrasive recipes — high mineral filler, glass fibre, high carbonate — should be bimetallic; a tungsten-added alloy reaching 62 HRC resists that abrasion far longer than a thin nitrided case.

What is a parallel twin screw extruder?

It is the machine that houses a parallel twin screw and barrel, typically co-rotating for compounding and pelletizing. The barrel and screw are the wear heart of the machine and are matched to the extruder and the recipe.

How do I order the right parallel twin screw barrel?

Tell us co- or counter-rotating, your material and output, how abrasive the recipe is, and your extruder brand/model or a drawing. With those, we specify the segments, screw profile and surface treatment and quote within 12 hours.

Parallel Twin Screw Barrel: Co-rotating vs Counter-rotating, Hom & Kev siv

2026-08-13 0 Tso lus rau kuv

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

Teb ceev

Ib tug sib npaug ntxaib ntsia hlau chim muaj ob intermeshing screws ntawm tas mus li txoj kab uas hla khiav ntawm ib sab nyob rau hauv ib tug sib tw ntxaib-bore chim. Tsis zoo li lub conical chim, cov ntsia hlau nyob rau tib qhov loj kawg mus rau qhov kawg, thiab lub thoob feem ntau yog tsim los ntawm ntu. Co-rotating parallel screws haum compounding, granulation thiab masterbatch; counter-rotating parallel screws haum PVC thiab ua haujlwm siab.

Covthaum uas tig mus twin ntsia hlau chimyog lub workhorse ntawm compounding thiab pelletizing - nyob qhov twg koj xav tau intensive mixing, meej kub tswj thiab yooj yim rau reconfigure lub ntsia hlau rau ib tug tshiab formulation. Qhov twg lub conical chim yog tsim rau ncaj qha PVC extrusion, ib tug parallel ntsia hlau chim yog tsim rau versatility. Cov lus qhia no piav qhia nws ua haujlwm li cas, qhov sib txawv tseem ceeb ntawm kev sib hloov thiab kev sib hloov cov qauv tsim, ntu (lub tsev-thaiv) cov qauv uas ua rau nws hloov tau, thiab yuav ua li cas xaiv qhov zoo rau koj cov khoom.

Parallel twin screw barrel (counter-rotating) manufactured by Nanhaiya — Ib tug parallel ntxaib ntsia hlau thiab chim - tas li-inch screws nyob rau hauv ib tug sib tw twin-bore chim.

Dab tsi yog parallel twin ntsia hlau chim?

Ib qho kev sib txuas ntsia hlau tuav tuav ob lub taub hau ntawm tib txoj kab uas hla los ntawm kev pub kom tawm mus, khiav hauv ib daim duab-yim ntxaib ntxaib. Vim tias txoj kab uas hla tsis tu ncua, kev coj tus cwj pwm yog teem los ntawm cov ntsia hlaukev teeb tsaes tsis yog los ntawm taper - koj hloov kev ua tau zoo los ntawm kev hloov cov ntsiab lus ntawm cov ntsia hlau, tsis yog lub taub hau. Tias yog vim li cas thaum uas tig mus ntxaib ntsia hlau thiab chim systems dominate compounding: tib lub tshuab yuav khiav wildly txawv zaub mov txawv los ntawm rebuilding lub ntsia hlau.

Ob yam txhais tau hais tias qhov sib npaug ntxaib ntsia hlau thoob: qhov kev taw qhia cov ntsia hlau tig (co-rotating los yog counter-rotating), thiab yuav ua li cas lub thoob thiab ntsia hlau tsim (feem ntau yog los ntawm ntu). Ob leeg tau them rau hauv qab no. Rau lub hauv paus mechanics, saib peb tus neeg piav qhia ntawmyuav ua li cas ib tug parallel ntxaib ntsia hlau ua haujlwm.

Co-rotating vs counter-rotating

Qhov no yog qhov sib txawv tseem ceeb tshaj plaws hauv tsev neeg sib npaug. Ob leeg yog intermeshing ntxaib-ntsia hlau designs, tab sis lawv qhia thiab sib tov sib txawv heev.

Qhov xwm txheej	Co-rotating thaum uas tig mus	Counter-rotating thaum uas tig mus
Ntsia hlau tig	Ob lub screws tig tib txoj kev	Screws tig nyob rau hauv opposite lus qhia
Sib tov	High-shear, zoo heev distributive & dispersive mixing	Gentler, zoo li calender, zoo conveying
Yam ceev	Cov ntsia hlau ntau dua, cov zis siab	Tsawg ceev, ruaj khov siab tsim
Zoo tshaj rau	Compounding, masterbatch, granulation, puv / iav-fibre	PVC yeeb nkab / profile, tshav kub-rhiab heev, high-filler PVC
Xav	Reconfigurable "sib xyaw tshuab"	Pump-zoo li, maj mam "extrusion tshuab"

Nyob rau hauv luv luv: ib tug co-rotating ntxaib ntsia hlau yog cov cuab yeej rau kev sib tov thiab dispersion; lub counter-rotating ntxaib ntsia hlau yog cov cuab yeej rau maj mam, khov kho PVC conveying. Ntau cov nroj tsuag muaj ob qho tib si. Yog tias koj txoj haujlwm yog tig cov khoom xyaw rau hauv pellets, koj xav tau kev sib hloov; Yog tias nws tig PVC qhuav-sib xyaw rau hauv cov yeeb nkab lossis profile, counter-rotating (los yog conical chim) yog qhov zoo dua.

Segmented parallel twin screw elements on a shaft

Segment (building-block) chim tsim

Feem ntau cov kab ke sib txuas yog modular: lub thoob yog ua los ntawm cov ntsia hlau-ua ke thiab cov ntsia hlau ntawm cov ntsiab lus tseem ceeb threaded mus rau lub ncej. Qhov "lub tsev-thaiv" txoj hauv kev no yog qhov muab qhov sib npaug ntxaib ntsia hlau thoob nws qhov yooj yim - koj tuaj yeem tso ntu pub, ob peb ntu sib xyaw, lub qhov cua thiab qhov ntsuas qhov ntsuas raws nraim qhov twg daim ntawv qhia xav tau, thiab sib pauv hnav lossis cov khoom tsis tsim nyog ntawm tus kheej es tsis txhob hloov tag nrho cov ntsia hlau.

Cov txiaj ntsig zoo:

Reconfigurable- rov tsim kho cov ntsia hlau profile rau kev tsim tshiab yam tsis muaj lub tshuab tshiab.
Lub hom phiaj hnav qhov chaw- Hloov tsuas yog ntu hnav, tsis yog tag nrho cov ntsia hlau thiab lub thoob.
Venting qhov twg koj xav tau- txoj hauj lwm vent seem rau ya raws thiab volatile tshem tawm.
Muab kev siv zog ntawm kev thov- ntxiv los yog tshem tawm kneading blocks rau tune shear.

Parallel vs conical twin ntsia hlau chim

Cov neeg yuav khoom feem ntau hnyav ib qho piv rau ibconical twin ntsia hlau chim. Txoj cai luv luv: conical rau ncaj qha PVC extrusion, parallel rau compounding thiab xav tau sib tov.

Qhov xwm txheej	Parallel twin ntsia hlau chim	Conical twin ntsia hlau chim
Ntsia hlau zoo	Txoj kab uas hla tsis tu ncua, segmented	Tapered, dav pub rau nqaim tuag
Lub zog	Mixing, dispersion, yooj	Siab pub & compression hauv luv luv
Zoo tshaj rau	Granulation, masterbatch, compounding, WPC pellets	PVC yeeb nkab, profile, board, ntawv
Filler tuav	Zoo heev nyob rau hauv siab heev muab tub lim / iav-fibre	Zoo; tune nrog kev kho deg
Yooj yim	Reconfigurable ntsia hlau profile	Tsau geometry ib qhov loj me

Daim ntawv thov

Vim tias cov ntsia hlau profile tuaj yeem hloov kho mus rau txoj haujlwm, qhov sib npaug ntxaib ntsia hlau chim npog ntau yam kev ua haujlwm. Feem ntau configurations ntawm Nanhaiya muaj xws li:

Granulation & pelletizing- classic ua haujlwm sib luag; saib pebthaum uas tig mus ntxaib ntsia hlau pelletizing kab.
Compounding & masterbatch- dispersing pigments, additives thiab fillers rau hauv cov cab kuj.
PS ua npuas ncauj— saibPS ua npuas ncauj parallel ntxaib ntsia hlau.
Aluminium-yas vaj huam sib luag— saibaluminium-yas phaj parallel ntxaib ntsia hlau.
Roj hmab & yas— saibroj hmab thiab yas parallel ntxaib ntsia hlau.
PVC yeeb nkab (parallel)- rau cov kab uas khiav ib qho parallel es tsis yog conical layout:PVC yeeb nkab parallel ntsia hlau chim.

Parallel twin screw pelletizing line for compounding and granulation — Ib qho kev sib tw twin ntsia hlau pelletizing kab - lub tsev ntau tshaj plaws rau kev sib koom ua ke sib txuas.

PS foaming parallel twin screw and barrel — Ib tug parallel ntxaib ntsia hlau thiab chim ua rau PS foaming.

Khoom siv thiab kev kho deg

Compounding yog abrasive ua hauj lwm - iav fiber, mineral fillers thiab siab carbonate loadings hnav screws thiab chim ceev - yog li cov khoom thiab nto kho mob muaj teeb meem ntau npaum li cas rau ib tug thaum uas tig mus system raws li nyob rau hauv ib tug conical. Nanhaiya tsim cov ntsia hlau sib txuas thiab cov thoob los ntawm 38CrMoAlA nitrided steel, W6Mo5Cr4V2 los yog HIP hmoov hlau, nrog nitrided, bimetallic los yog tungsten-carbide nto kom phim qhov puas ntawm koj daim ntawv qhia.

Rau hnyav hnyav los yog iav-reinforced tebchaw, ib tug bimetallic nto yog qhov tsim nyog xaiv: peb tungsten-ntxiv alloy ncav cuag62 HRCsab hauv lub bore - piv rau ib qho 58 HRC - rau lub neej ua haujlwm ntev. Parallel chim yog tuav rau qhov kam rau ua ntawm ± 0.01 mm. Yog tias koj tab tom ntsuas qhov chaw xaiv, saib peb phau ntawv qhiabimetallic ntsia hlau thoob, uas siv sib npaug rau cov kab ke sib luag.

Yuav ua li cas xaiv txoj cai parallel ntxaib ntsia hlau chim

Plaub nqe lus nug ua rau koj mus rau qhov tseeb specification:

Co- lossis counter-rotating?Compounding thiab pelletizing → co-rotating; PVC thiab maj mam conveying → counter-rotating.
Koj ua dab tsi?Daim ntawv qhia teev cov ntsia hlau profile - sib tov blocks rau dispersion, vents rau volatiles.
Yuav ua li cas abrasive?High muab tub lim lossis iav fiber ntau → bimetallic / tungsten-carbide nto.
Lub tshuab dab tsi?Xa koj lub npe extruder / qauv lossis kos duab kom cov ntu thiab ncej sib haum raws nraim.

Parallel screws thiab chim yog zoo kev cai rau lub tshuab thiab daim ntawv qhia, yog li ib daim duab los yog qauv ntxiv rau koj cov khoom thiab cov zis tso cai rau peb hais kom meej-haum.ib leeg, parallel los yog conical ntsia hlau chim - los yog ua tiavtshuab extruder- hauv 12 teev.

Cov lus nug uas nquag nug

Dab tsi yog parallel twin ntsia hlau chim?

Nws yog ib tug ntxaib-bore chim tuav ob tas li-inch intermeshing screws uas khiav ntawm ib sab. Tsis zoo li lub conical chim, cov ntsia hlau nyob rau tib qhov loj kawg mus rau qhov kawg thiab lub kaw lus feem ntau yog segmented, yog li cov ntsia hlau profile tuaj yeem raug kho dua tshiab rau cov qauv sib txawv.

Dab tsi yog qhov txawv ntawm co-rotating thiab counter-rotating?

Co-rotating screws tig tib txoj kev thiab muab high-shear sib tov ntawm kev kub ceev - zoo tagnrho rau compounding thiab masterbatch. Counter-rotating screws tig oppositely nrog softer, twj zoo li conveying - zoo dua rau PVC thiab kub-rhiab heev, high-filler ua hauj lwm.

Dab tsi yog ntu (lub tsev thaiv) parallel ntxaib ntsia hlau chim?

Nws yog ib qho qauv tsim uas lub thoob yog bolt-ua ke ntu thiab cov ntsia hlau yog cov ntsiab lus tseem ceeb ntawm lub ncej. Koj tuaj yeem tso cov khoom noj, sib tov, qhov cua thiab ntsuas qhov ntsuas raws li daim ntawv qhia xav tau, thiab hloov tsuas yog cov ntu hnav tsis yog tag nrho cov ntsia hlau.

Parallel los yog conical twin ntsia hlau chim - kuv xav tau dab tsi?

Xaiv conical rau ncaj qha PVC yeeb nkab, profile, board thiab ntawv extrusion. Xaiv qhov sib npaug rau granulation, compounding, masterbatch thiab high-filler los yog iav-fibre dispersion, qhov twg reconfigurable mixing tseem ceeb tshaj plaws.

Dab tsi yog parallel twin ntsia hlau chim siv rau?

Feem ntau granulation thiab pelletizing, compounding thiab masterbatch, PS foaming, aluminium-yas composite vaj huam sib luag, roj hmab thiab yas, thiab parallel-layout PVC kab. Lub tunable ntsia hlau profile cia ib lub tshuab ua ntau yam zaub mov txawv.

Puas yuav tsum tau ib lub thoob sib npaug yog nitrided lossis bimetallic?

Cov khoom siv huv si tuaj yeem siv nitrided. Abrasive zaub mov txawv - siab ntxhia muab tub lim, iav fiber ntau, siab carbonate - yuav tsum yog bimetallic; ib qho tungsten-ntxiv alloy ncav cuag 62 HRC tiv thaiv qhov kev puas tsuaj ntev dua li cov ntaub ntawv nyias nitrided.

Dab tsi yog qhov parallel ntxaib ntsia hlau extruder?

Nws yog lub tshuab uas muaj ib qho kev sib txuas ntxaib ntsia hlau thiab lub thoob, feem ntau sib koom ua ke rau kev sib xyaw thiab pelletizing. Lub thoob thiab cov ntsia hlau yog lub plawv ntawm lub tshuab thiab raug muab tso rau hauv extruder thiab daim ntawv qhia.

Yuav ua li cas kuv thiaj li txoj cai parallel twin ntsia hlau chim?

Qhia rau peb co-los yog counter-rotating, koj cov khoom thiab cov zis, abrasive daim ntawv qhia yog npaum li cas, thiab koj extruder hom / qauv los yog ib tug kos duab. Nrog rau cov no, peb qhia cov ntu, ntsia hlau profile thiab kho qhov chaw thiab hais lus hauv 12 teev.

Cov khoom lag luam cuam tshuam los ntawm peb lub Hoobkas

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Tau txais ib lub thoob ntxaib ntsia hlau sib npaug sib npaug rau koj daim ntawv qhia

Qhia rau peb co-los yog counter-rotating, koj cov khoom thiab cov zis, thiab koj tus qauv extruder - peb cov engineers yuav qhia cov ntu, ntsia hlau profile thiab kho qhov chaw. Rau cov tshuaj abrasive, peb cov tungsten-ntxiv bimetallic chim siab ncav cuag 62 HRC nyob rau 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 ·thaum uas tig mus, conical & ib leegntsia hlau chim &extruder tshuab