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: Tataiso e Felletseng ea Litlhaloso, Lisebelisoa le Khetho

2026-08-05 0 Ntlohele molaetsa

Ka hoSehlopha sa Tekheniki sa Nanhaiya- Screw & Barrel Engineering, Zhoushan · E hlahlobiloe bakeng sa ho nepahala ha fektheri · ~ 10 min bala

Karabo e potlakileng

Moqomo oa conical twin screw barrel ke karolo e tapered, e nang le mafahla a extrusion moo likurufu tse peli tsa khoho li potolohang ka har'a moqomo o ts'oanang oa conical. The tapered geometry e fana ka phepelo e matla le compression phahameng ka bolelele e khutsoanyane, ke ka lebaka leolefahla la conical screw le barrelke khetho e tloaelehileng bakeng sa phala ea PVC, profil, sheet le WPC extrusion.

Haeba o tsamaisa mohala oa PVC kapa oa lehong-polasetiki, thelefahla la conical screw barrelke e 'ngoe ea likarolo tse etsang qeto ka ho toba tlhahiso ea hau, boleng ba ho qhibiliha le litšenyehelo tse sebetsang. Khetha boholo bo fosahetseng, thepa kapa tumello 'me u e lefelle ka ho apara, likheo le nako ea ho theoha. Tataiso ena e akaretsa kamoo conical screw barrel e sebetsang kateng, lintlha tsa bohlokoa ha u reka, hore na e fapana joang lelefahla le bapileng screw barrel, le mokhoa oa ho khetha, ho kenya le ho hlokomela e le ’ngoe — e ngotsoeng ho latela pono ea fektheri e etsang mechine ena letsatsi le letsatsi.

Conical twin screw barrel manufactured by Nanhaiya — Sekoti sa conical twin le barrel set - libore tse tapered li fana ka compression ea bolelele bo bokhuts'oane bakeng sa PVC e sa utloeng mocheso.

Kamoo conical twin screw barrel e sebetsang kateng

Ho alefahla la conical screw extruder, li-screws tse peli li lula li bapile ka lehlakoreng le lenyenyane, li pharaletseng qetellong ea phepelo 'me li tšesaane qetellong ea lefu. The barrel bores taper ho tšoana. Ha lisebelisoa tse tala li tloha sebakeng sa phepelo sa bophara bo boholo ho ea sebakeng sa metering se senyenyane, molumo o ntseng o fokotseha o o hatella le ho o etsa polasetiki ha lifofane tse kenang lipakeng li tsamaisa le ho kopanya. Hobane li-screws tse peli li pota-pota 'me li kopane ka ho feletseng, sekoti sa conical twin le barrel e sebetsa joaloka pompo e ntle ea ho falla - tlhahiso e tsitsitseng ka sekiri se tlaase, se bonolo, se sireletsang lipolima tse thibelang mocheso tse kang PVC.

Ts'ebetso e arotsoe ka mekhahlelo e meraro:

Ho fepa le ho fetisa- bophara bo boholo ba phepelo bo fana ka molumo o moholo oa ho noa, kahoo motsoako oa phofo le lisebelisoa tse nang le bongata bo fokolang (joaloka PVC dry-blend) li huleloa ka mokhoa o ts'eptjoang ntle le borokho.
Compression & plasticizing- taper e fokotsa molumo oa mocha ka bolelele, e kopanya thepa, e leleka moea le ho e qhibilihisa ka mocheso o kopantsoeng le mosebetsi oa mechine.
Metering & discharge- sebaka se moqotetsane sa metering se haha khatello e tsitsitseng mme se sutumelletsa junifomo, homogeneous qhibiliha ka lefu ka tekanyo e laoloang.

Moqomo o etsa ho fetang feela ho kenya likurufu. E na le libaka tse futhumatsang le tse pholileng tse tšoarang sethala ka seng mocheso o nepahetseng. Libarele tsa Nanhaiya li sebelisa sebopeho sa ho futhumatsa le ho pholile ka libaka tse ngata - hangata li fepa, li hatella le ho kenya li-homogenization - tse nang le vacuum ea boikhethelo ho hula mongobo le ho senyeha ho tsoa ho qhibiliha, e leng taba ea metsoako e tlatsitsoeng le ea hygroscopic.

Lintlha tsa bohlokoa tseo u lokelang ho li hlahloba pele u reka

Libarele tse peli tsa conical li ka shebahala li tšoana 'me li sebetsa ka tsela e fapaneng haholo. Tsena ke lintlha tse etsang qeto ea ho lekana, tlhahiso le bophelo bo sa feleng - lipalo tseo u lokelang ho li netefatsa khotheishene efe kapa efe.

Ntho e khethehileng	Seo e se bolelang	Hobaneng ho le bohlokoa
Karolelano ea bophara	The feed-end / die-end diameter, mohl. 45/90, 50/105, 55/110, 65/132, 80/156, 92/188 mm	E beha sehlopha sa mochini le sehlopha sa lihlahisoa - e tlameha ho ts'oana le mofuta oa hau oa extruder hantle
Karolelano ea L/D	Bolelele bo sebetsang hantle khahlanong le bophara	Bolelele bo sebetsang bo bolelele = nako e eketsehileng ea bolulo bakeng sa fusion e feletseng le degassing
Kereiti ea lintho tse bonahalang	38CrMoAlA nitrided steel, W6Mo5Cr4V2, HIP powder steel, kapa bimetallic	Ka ho toba li khanna bophelo bo botle le ho hanyetsa kutu khahlanong le metsoako e tlatsitsoeng ea PVC
Phekolo ea holim'a metsi & ho thatafala	Nitriding, chrome plating, bimetallic alloy kapa tungsten-carbide spray	Nanhaiya e fafatsa lesela la motsoako oa tungsten hore le fihle62 HRCka har'a barrel khahlano le 58 HRC e tloaelehileng
Botebo ba lera la motsoako	Botenya ba lera le ka hare le sa senyeheng	Nanhaiya's bimetallic layer ke 2.5–3 mm — lera le tebileng le bolela hore ho na le fensetere e telele e ka sebelisoang.
Screw/barrel clearance	Phapang pakeng tsa sefofane le lebota la bore	E kholo haholo = tahlehelo ea khatello le tlhahiso e tlase; sekheo se thata, se nepahetseng se boloka bokhoni bo le holimo
Boitshokollo (bo-ma-me-le) /thight	Ho sebetsa ka nepo ea karolo e phethiloeng	Nanhaiya e na le libarele tse peli tse kholo ho ±0.0005 mm bakeng sa ho lekana, ho phetoa
Matla a tlhahiso (kg/h)	E fetisetsoa ka boholo	Nomoro ea moreki ea mantlha - e bapise le lebelo la mohala oa hau le sehlahisoa

Tlhaloso e akaretsang ea indasteri:litlhaloso tsa boholo ba conical tse kang 45/90 kapa 65/132 (feed/die diameter in mm) li tloaelehile ho pholletsa le mechine ea conical ea mofuta oa SJZ, kahoo barrel e hlalositsoeng ka tsela ena hangata e ka bapisoa le extruder e teng. Kamehla netefatsa khahlanong le setšoantšo kapa sampole pele o laela. U ka bona boholo bo tloaelehileng ho ronalefahla la conical screw barrelleqephe.

Conical vs parallel twin screw barrel

Potso e atileng haholo eo bareki ba e botsang ke hore na ba hloka conical kapa alefahla le bapileng screw barrel. Ka bobeli ke li-screw, ka bobeli li-intermesh - empa geometry e lumellana le mesebetsi e fapaneng. Ka bokhutšoanyane: conical e ipabola ka ho toba PVC / WPC extrusion ea pipe, profile le board; parallel e matla bakeng sa ho kopanya, masterbatch le liforomo tse phahameng haholo.

Ntlha	Conical twin screw barrel	Parallel twin screw barrel
Boitšoaro ba fepa	Ho buloa ho hoholo ha phepelo - ho ja lijo tse betere bakeng sa phofshoana ea bongata bo tlase	Ho fepa ka mokhoa o tšoanang bakeng sa ho kopanya le ho fepa ka pellet
Khatello	Khatello e phahameng e hahelletsoeng ka har'a tapered geometry	Ho hatella ho eketsehileng ka bophara bo tsitsitseng
Mocheso / kuta	Ts'ebetso e bonolo, e laoloang - e ntle bakeng sa PVC e sa utloeng mocheso	E phahameng ho kuta - molemo bakeng sa e matla ho kopanya le ho hasana
Tšebeliso e tloaelehileng	Pipe ea PVC, profil, lakane, WPC, lithaele tsa resin	Masterbatch, compements, high-CaCO₃ le mosebetsi o tletseng likhalase
Tlhokomelo	Ho apara le ho hloekisoa ho hloka tlhokomelo e haufi le taper	Hangata maemo a bonolo a jiometri le phetoho ea lintho

Molao o molemo oa letsoho: haeba sehlahisoa sa hau sa ho qetelakeextrudate (peipi kapa boto e otlolohileng ka holim'a lefu), "conical twin screw barrel" hangata ke sesebelisoa se nepahetseng. Haeba u etsa li-pellets kapa u hasanya sephutheloana sa tlatsetso se boima, sheba sekoaelo sa marang-rang se ts'oanang - haholo mofuta o pota-potileng bakeng sa ho jara carbonate e phahameng haholo. Ha u tsebe hantle hore na ke efe e lumellanang le mohala oa hau? Tsa ronaSekurufu se le seng, mefuta e fapaneng ea conical le e bapileng kaofela e bonts'itsoe holeqephe la lihlahisoa.

Lisebelisoa tse tloaelehileng

Hobane e kopanya phepo e matla, khatello e phahameng le ho kuta ka bonolo, sekoti sa conical twin le barrel ke mosebetsi o mongata oa PVC e thata le extrusion ea lehong-plastiki. E sebetsa hantle bakeng sa:

Pipe ea PVC- phepelo ea metsi, drainage le conduit pipe ho tsoa ho PVC e omileng.
Boemo ba PVC— liprofaele tsa lifensetere le mamati, maqhama le ho fokotsa.
Letlapa le PVC- letlapa la foam, letlapa la 'mabole le boto ea foam e sa lefelloeng (sheba ea ronaPVC board conical twin screw barrel).
WPC (motsoako oa lehong-polasetiki)- ho khabisa, liphanele tsa marako le li-profiles tse tsoang metsoako e tletseng lehong.
Lihlahisoa tse thehiloeng ho PE le tsa resin-tile- ho kenyeletsoa lithaelese tse nang le lesenke la marulelo a marang-rang le liprofaele tse tlatsitsoeng ke PE.
PVC pelletizing- ho fetola motsoako o omileng oa PVC hore e be li-granules bakeng sa tšebeliso e tlase ea noka.

PVC board conical twin screw barrel for foam and marble sheet extrusion — Conical twin screw barrel e etselitsoeng boto ea PVC le extrusion ea pampiri ea foam.

Tsela ea ho khetha le tokelo ya conical twin screw barrel

Khetho e theohela ho lipotso tse tharo: u sebelisa lisebelisoa life, u hloka tlhahiso efe, 'me tlhahiso ea hau e mpe hakae? Sebelisa matrix e ka tlase e le sebaka sa ho qala, ebe u netefatsa boholo bo nepahetseng khahlanong le mochini oa hau.

Lintho tsa hau / tlhoko	Tlhophiso e sisintsweng	Bokaholimo / khetho ea thepa
Pipe e thata ea PVC & profil	Geometry e tloaelehileng ea conical e boholo ho extruder ea hau (mohlala 55/110, 65/132)	Nitrided 38CrMoAlA bakeng sa PVC e hloekileng, e tlatsing ka tlase
PVC + e phahameng CaCO₃ filler	Conical e nang le lisebelisoa tse matlafalitsoeng, kapa e nyolohele ho ea ho e bapileng e potolohang	Bimetallic / tungsten-carbide layer (62 HRC) bakeng sa abrasion
WPC / metsoako ea lehong-fiber	Conical e nang le moea o matla le tšireletso ea ho roala	Bimetallic - fiber ea lehong + li-fillers li na le li-abrasive haholo
PVC foam board / sheet	Conical tuned bakeng sa mocheso o laoloang oa ho qhibiliha le khatello e tsitsitseng	Nitrided kapa bimetallic ho latela boemo ba ho tlatsa
Phaello e phahameng ka mokhoa o ts'oanang	Karolelano e kholo ea bophara le/kapa bolelele bo sebetsang bo bolelele	Bapisa boima ba ho sebetsa lihora tse ngata le mojaro oa ho tlatsa

Ho sa tsotellehe hore na karabo ke efe, mohato o le mong oa bohlokoa ka ho fetisisa ke ho bapisa barrel le mochine oa hau o teng. Likarolo tsa li-conical li tloaelehile ho li-extruder tseo li kenang ho tsona, kahoo setšoantšo - kapa sampuli e nang le litekanyo tsa bohlokoa (phepelo / bophara ba ho shoa, sebaka se bohareng, bolelele ba kakaretso le lintlha tsa flange) - e re lumella hore re qotse sebaka se loketseng hantle ho e-na le karolo ea "haufi ka ho lekaneng". Haeba o hloka mohala oohle ho fapana le karolo, re boetse re ahamechine e feletseng ea extruder.

Metheo ea ho kenya le wiring

Barrel e nepahetseng e sebetsa feela haeba e kentsoe lisekoere, e hloekile ebile e futhumetse hantle. Mehato e ka tlase ke kakaretso ea kakaretso - kamehla latela bukana ea sehahi sa mochini oa hau le mekhoa ea ho notlela kantle.

Tlosa 'me u koale.Arola koloi le li-heaters tsohle pele u tlosa moqomo oa khale. Netefatsa noto ea matla pele o qala.
Hloekisa lifahleho tsa ho nyalana.Tlosa li-sealant tsa khale, k'habone le li-burrs ho li-flanges 'me u bone lifahleho e le hore litulo tse ncha tsa barrel li se ke tsa sotha.
Thaba le ho ikamahanya.Kenya moqomo oa conical ho lebokose la li-gear/feed, lekola boteng le hore likurufu li thinye ka bolokolohi ka letsoho pele matla a sebelisoa.
Hokela libaka tsa heater.Hokela hape lihitara tsa lihlopha le ho pholisa sebakeng ka seng (fepa → compression → metering), 'me u kopanye thermocouple e' ngoe le e 'ngoe le kanaleng e nepahetseng ea taolo e le hore ho se be le sebaka se nang le likhoele.
Beha profil ea soak.Fokotsa moqomo butle-butle 'me u o tlohele hore o kolobelle e le hore tšepe e qhibilihe pele u qala li-screw - ho qala ho baka kotsi ea torque.

Keletso ea sebaka sa mocheso:boloka sebaka sa phepelo se bata haholo 'me u nyolle mocheso ho ea fihla moo ho leng teng. Libaka tse sa leka-lekaneng kapa tse entsoeng ka 'mapa o fosahetseng ke e' ngoe ea lisosa tse atileng haholo tsa ho hola le mela e ntšo - e lokelang ho hlahlojoa habeli kamora phetoho efe kapa efe ea moqomo.

Ho rarolla mathata le ho senya

Mathata a mangata a conical barrel a iponahatsa e le sehlahisoa se sa tsitsang, ho chesa haholo kapa sehlahisoa se senyehileng. Sebelisa tafole ena ho tloha ka potlako ho tloha matšoao ho ea ho sesosa sa ho lokisa.

Letšoao	Mohlomong sesosa	Lokisa
Sephetho sea fetoha / ho phahama	Fepa ho se lumellane, lifofane tse tsofetseng, kapa mocheso oa mocheso	Sheba phepelo, netefatsa mocheso oa libaka, lekanya ho hloekisoa ha screw/barrel
Ho chesa haholo	Ho se leka-lekane ha heater, khohlano e feteletseng, kapa ho tsidifala ho thibetsoeng	Hlahloba sebaka se seng le se seng le potoloho ea pholileng; tsosolosa 'mapa oa thermocouples
Plastiki e fokolang	Sekoti se fosahetseng kapa sebono sa moqomo se tsofetseng	Netefatsa tlhophiso; hlahloba sebaka se atolositsoeng ho tloha ho apara
Methalo e metsho / methalo	Matheba a shoeleng a tšoere thepa e senyehileng, kapa bore ea lintlha	Hlatsoa 'me u hloekise hantle; hlahloba bokaholimo ba bore le sekoti
Ho apara ka ho fetelletseng / kapele	Abrasive filler, paballo e fosahetseng, kapa ho thatafala ho tlase-spec	Ntlafatsa ho barrel ea bimetallic / tungsten-carbide; tiisa ho hlokomela

Ho apara ho tloaelehile - sepheo ke ho etsa hore e be butle ebile e lebeletsoe esale pele. Li-fillers tsa abrasive (CaCO₃, fiber ea lehong, khalase) li hlasela bore le lifofane tse potlakileng ka ho fetisisa, ke ka lebaka leo karolo e ka hare e tebileng, e thata haholoanyane e lefang ka boeona. Sebaka sa 62 HRC se kentsoeng ka tungsten se tšoarella nako e teletsana khahlano le metsoako eo ho feta sephetho se tloaelehileng sa 58 HRC, se lelefatsa nako lipakeng tsa ho aha bocha.

Lethathamo la tlhokomelo

Licheke tse khutšoane, tse tloaelehileng li thibela ho hloleha ho theko e boima. Theha tsena molemong oa hau:

Karohano	Hlahloba	Ketso
Phetoho e 'ngoe le e 'ngoe	Lithempereichara tsa libaka le li-amps	Ho baloa ha lifate; batlisisa ho hoholeha hofe kapa hofe ho tloha qalong
Beke le beke	Qhibiliha boleng & holim 'a qeta	Sheba li-streaks tse ncha, li-gel kapa liphetoho tse hlahisoang
Khoeli le khoeli	Hloekisa le ho sheba bore / screw check	Hloekisa libaka tse shoeleng; sheba bakeng sa lintlha kapa mmala
Kotara	Screw/barrel clearance	Lekanya lekhalo; bapisa le spec ho latela sekhahla sa ho apara
Joalo ka ha ho hlokahala	Heater & thermocouple botšepehi	Fetola li-band/sensor tse hlolehileng pele li baka sehlahisoa se sebe

Lipotso tse botsoang khafetsa

Conical twin screw barrel ke eng?

Ke karolo ea "twin-bore extrusion" e tepeletseng eo ho eona li-screws tse peli tsa conical li potolohang ka har'a moqomo o ts'oanang oa conical. Taper e hatella le ho etsa polasetiki nako e telele, e etsa hore conical screw barrel e loketse phala ea PVC, profil, sheet le WPC extrusion.

E sebelisoa hamolemo bakeng sa thepa efe?

PVC e thata (pipe, profil, boto le lakane), motsoako oa lehong-polasetiki, lintlha tse thehiloeng ho PE le lithaele tsa resin, hammoho le PVC pelletizing. E sebetsana le liphofshoana tse omeletseng tse tlase haholo-holo ka lebaka la ho ja lijo tse ngata.

E fapane joang le parallel twin screw barrel?

Moqomo oa conical o taper 'me o haha mohatla o phahameng ka sekiri se bonolo, se loketseng ka ho toba PVC/WPC extrusion. Alefahla le bapileng screw barrele boloka bophara bo sa feleng le ho kuta e phahameng, e lumellanang le metsoako, masterbatch le li-filler tse phahameng haholo.

Kakaretso ea tumello ke efe lipakeng tsa screw le barrel?

Ho hlaka ke lekhalo le lenyane pakeng tsa ntlha ea sefofane le lebota la bore. E behiloe ka thata le e nepahetseng karolong e ncha; ha e ntse e bula ho tloha ho apara, ho tsoa le ho theoha ha khatello. Ho e lekanya nako le nako ke tsela e hlakileng ka ho fetisisa ea ho latela mokhoa oa ho roala barrel.

Nka kenya conical twin screw barrel joang?

Theola 'me u notlelle ka ntle, hloekisa lifahleho tsa ho nyalana, beha 'me u ikamahanye e le hore likurufu li fetohe ka bolokolohi, kenya terata sebakeng se seng le se seng sa heater le thermocouple ka nepo, ebe u nyollela barrel mochesong butle 'me u e kolobise pele u qala li-screw.

Ke eng e bakang ho roala ha libarele tsa conical twin screw?

Haholo-holo li-filler tse abrasive tse kang calcium carbonate, fiber ea lehong le khalase, e mpefalitsoeng ke ho bola ho tsoa ho ts'ebetso ea PVC, tlhokomelo e fosahetseng le boima bo sa hlalosoang. Lera le tebileng la bimetallic kapa tungsten-carbide le hanyetsa tse tharo hantle haholo.

Moqomo o lokela ho hlahlojoa kapa ho nkeloa sebaka hangata hakae?

Etsa licheke tsa pono le ho hloekisa khoeli le khoeli 'me u lekanye tumello ka kotara. Nako ea ho khutlisa e ipapisitse le boima ba li-filler le lihora tsa ho sebetsa - latela mokhoa oa ho apara ho e-na le ho emela ho hloleha, 'me u hahe kapa u nke sebaka hang ha tumello e feta.

Ke khetha boholo bo nepahetseng joang bakeng sa mohala oa ka oa extrusion?

Bapisa bophara ba karo-karolelano le bolelele le moetso oa hau oa extruder le sepheo sa hau, ebe u khetha kalafo ea bokaholimo ho latela hore na sebopeho sa hau se hlaba hakae. Romela setšoantšo kapa sampole e nang le litekanyo tsa bohlokoa e le hore barrel e lekane hantle, eseng khakanyo.

Na u hloka moqomo oa conical screw screw o tsamaellanang le mochini oa hau?

Re romelle setšoantšo sa hau - kapa sampole e nang le litekanyo tsa bohlokoa - 'me lienjineri tsa rona li tla fana ka sekoti se lekanang hantle sa conical conical le barrel e thata e nepahetseng bakeng sa thepa ea hau. Ka ho sebetsa ka har'a nitriding, bimetallic le tungsten-carbide, re theha likarolo tse fihlang ho 62 HRC ka har'a bore bakeng sa bophelo bo bolelele ba ts'ebeletso.

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Nanhaiya (Zhoushan) Mechini ea Plastiki · bareki ba 500+ lefatšeng ka bophara ·lesoha, lefahla la conical & lefahla le bapilengscrew barrel