Háþróuð plastendurvinnslukornun: Tækni, Búnaður og Zhuoyue Extruder lausnir

Á tímum aukinnar umhverfisvitundar og strangrar auðlindaverndarstefnu, plastendurvinnsla hefur orðið mikilvægur áhersla fyrir atvinnugreinar um allan heim. Meðal hinna ýmsu plastendurvinnslutækni, úrgangsplast endurvinnslu kornun stendur upp úr sem hagnýt, duglegur, og efnahagslega hagkvæm aðferð sem umbreytir fleygðu plastefni í endurnýtanlegt korn. Hægt er að vinna þessi endurunnu korn frekar í nýjar plastvörur, með afköstum sem eru sambærileg þeim sem eru framleidd úr ónýtum efnum, þannig að átta sig á raunverulegri auðlindadreifingu og draga úr umhverfisálagi af völdum plastúrgangs.

Zhuoyue, leiðandi framleiðandi á þrýstibúnaði, hefur skuldbundið sig til að útvega alhliða endurvinnslukornaframleiðslulínur fyrir allar tegundir plastúrgangs, þar á meðal PP (Pólýprópýlen), PE (Pólýetýlen), LDPE (Lágþéttni pólýetýlen), PET (Pólýetýlen tereftalat), PS (Pólýstýren), ABS (Akrýlónítríl bútadíen stýren), og fleira. Með háþróaðri extrusion tækni og ítarlegri sérþekkingu í plastendurvinnslu, Þrýstivélar Zhuoyue eru sérsniðnar til að mæta einstökum áskorunum sem felast í úrgangsplastkornun, skilar skilvirkum, orkusparandi, og hágæða lausnir fyrir fyrirtæki sem stunda plastendurvinnslu.

1. Yfirlit yfir úrgangsplast endurvinnslukornun

Endurvinnslu úrgangsplasts er sérhæft ferli sem umbreytir ýmsum gerðum úrgangsplasts - eins og plastflöskur, kvikmyndir, gáma, rusl úr framleiðslulínum, og plastúrgangur eftir neyslu - í einkennisbúning, hágæða plastkorn í gegnum röð af vélrænni og hitameðferð. Þessi endurunnu korn, einnig þekkt sem endurkorna eða endurunnar plastkögglar, hægt að nota beint í sprautumótun, extrusion, blástursmótun, og aðrar plastvinnsluaðferðir til að framleiða nýjar vörur, allt frá pökkunarefnum og byggingarhlutum til bílavarahluta og daglegra nauðsynja.

Kjarnagildi úrgangsplasts endurvinnslu kornunar liggur í getu þess til að takast á við tvöföld áskorun um förgun plastúrgangs og auðlindaskorts. Ólíkt hefðbundnum úrgangsplastförgunaraðferðum eins og urðun og brennslu, sem hafa í för með sér mikla umhverfisáhættu, endurvinnslukornun nær fram sannri endurvinnslu auðlinda:

Umhverfisvernd: Urðun plastúrgangs tekur upp dýrmætar landauðlindir og getur leitt til jarðvegs- og grunnvatnsmengunar, þar sem plast er ólífbrjótanlegt og getur losað skaðleg efni með tímanum. Brennsla, hins vegar, gefur frá sér eitraðar lofttegundir (eins og díoxín og kolmónoxíð) og svifryk, stuðla að loftmengun og hlýnun jarðar. Endurvinnsla kornunar dregur úr magni plastúrgangs sem fer á urðunarstaði og brennsluofna, lágmarka umhverfismengun og kolefnislosun.
Auðlindavernd: Plast er unnið úr óendurnýjanlegu jarðefnaeldsneyti (eins og olíu og jarðgas). Með því að endurvinna úrgang úr plasti í endurnýtanlegt korn, minnkar eftirspurn eftir ónýtum plastefnum, varðveita verðmætar jarðefnaauðlindir og draga úr orkunotkun sem tengist jómfrúar plastframleiðslu. Áætlað er að endurvinna eitt tonn af plasti geti sparað allt að 7.4 tunnur af olíu og draga úr kolefnislosun um 1.5 tonn.
Efnahagslegur ávinningur: Endurunnið plastkorn eru umtalsvert ódýrari en ónýtt plastefni, bjóða framleiðendum verulegan kostnaðarsparnað. Fyrir endurvinnslufyrirtæki, ferlið við að safna, vinnslu, og kornun úrgangsplasts getur skapað stöðugan hagnað, skapa ný atvinnutækifæri og atvinnustörf. Auk þess, mörg lönd og svæði bjóða upp á stefnuhvata (eins og niðurgreiðslur og skattaívilnanir) fyrir plastendurvinnslufyrirtæki, efla enn frekar efnahagslega hagkvæmni endurvinnslu kornunar.

Hins vegar, gæði endurunnar plastkorna og frammistaða endanlegra endurunninna vara eru mjög háð kornunarferlinu og búnaðinum sem notaður er.. Þættir eins og tegund og hreinleiki plastúrgangs, skilvirkni flokkunar og hreinsunar, hita- og klippastýringu við útpressun, og hönnun extruder hefur öll veruleg áhrif á endanlega vörugæði. Þess vegna, þróa einfalt, þægilegt, duglegur, orkusparandi, umhverfisvæn, og efnahagslega hagkvæmt kornunarferli hefur orðið í brennidepli rannsókna og þróunar í plastendurvinnsluiðnaðinum.

1.1 Helstu eiginleikar endurunnar plastkorna

Frammistaða endurunnið plastkorna er nátengd tegund plastúrgangs, hversu mikil mengun er, og kornunarferlið. Almennt séð, Hágæða endurunnið korn ætti að hafa eftirfarandi eiginleika:

Samræmd kornastærð: Stöðug kornastærð tryggir stöðuga fóðrun við síðari vinnslu (eins og sprautumótun og extrusion), bæta einsleitni og gæði endanlegrar vöru. Kornastærð endurunnar korna er venjulega á milli 2 mm og 5 mm, eftir umsóknarkröfum.
Lítil mengun: Aðskotaefni eins og óhreinindi, ryki, málmbrot, pappír, og önnur efni sem ekki eru úr plasti geta haft veruleg áhrif á frammistöðu endurunninnar korns og lokaafurðar. Þess vegna, skilvirk flokkun og hreinsun plastúrgangs eru nauðsynleg til að tryggja lágt mengunarstig.
Góð mýkt og vinnsluhæfni: Endurunnið korn ætti að hafa góða bræðslueiginleika og flæðihæfni, sem gerir kleift að vinna auðveldlega í nýjar vörur án þess að hafa áhrif á vinnsluskilvirkni eða vörugæði. Þetta krefst nákvæmrar stjórnunar á hitastigi og skurðhraða meðan á kornunarferlinu stendur til að forðast of mikið niðurbrot á sameindabyggingu plastsins.
Stöðugir vélrænir eiginleikar: Togstyrkurinn, lenging við brot, höggstyrkur, og aðrir vélrænir eiginleikar endurunninnar korns ættu að vera eins nálægt og mögulegt er við eiginleika ónýtra efna, tryggja að endanleg endurunnin vara uppfylli tilskilda frammistöðustaðla.
Lágt rakainnihald: Hátt rakainnihald í endurunnu korni getur leitt til galla eins og loftbólur og sprungna í endanlegri vöru við vinnslu. Þess vegna, Oft er þörf á þurrkunarskrefum meðan á kornunarferlinu stendur til að draga úr rakainnihaldi í viðunandi magn (venjulega fyrir neðan 0.5%).

1.2 Algengar tegundir plastúrgangs til kornunar

Næstum allar tegundir af hitaþjálu plasti er hægt að endurvinna og korna, á meðan hitaharðandi plasti (sem ekki er hægt að bræða og endurvinna) eru ekki hentugar til endurvinnslu kornunar. Algengustu tegundir plastúrgangs sem notaðar eru við endurvinnslukornun eru ma:

PP (Pólýprópýlen): Víða notað hitaplastefni með góða efnaþol, vélrænni eiginleikar, og vinnsluhæfni. Algengur úrgangur PP inniheldur plastfötur, gáma, húfur, og framleiðsluleifar. Endurunnið PP korn eru oft notuð til að framleiða plaströr, bílavarahlutir, og umbúðaefni.
PE (Pólýetýlen): Skipt í LDPE (Lágþéttni pólýetýlen) og HDPE (Háþéttni pólýetýlen). LDPE er almennt notað í plastfilmum, töskur, og flöskur, á meðan HDPE er notað í tunnum, rör, og gáma. Endurunnið PE korn hentar til framleiðslu á plastfilmum, rör, og sprautumótaðar vörur.
PET (Pólýetýlen tereftalat): Gagnsætt, stíft plast sem almennt er notað í drykkjarflöskur, matvælaumbúðir, og trefjavörur. Endurunnið PET korn er mikið notað við framleiðslu á pólýestertrefjum, plastflöskur, og umbúðaefni.
PS (Pólýstýren): Fáanlegt í stífum (eins og froðubollar, matarílát, og plastleikföng) og froðu (EPS, stækkað pólýstýren) eyðublöð. Hægt er að nota endurunnið PS korn til að framleiða plastleikföng, skreytingarefni, og froðuvörur.
ABS (Akrýlónítríl bútadíen stýren): Afkastamikið plast með góðan höggstyrk, stífni, og hitaþol. Algengur úrgangur ABS inniheldur plastskeljar af rafeindavörum, bílavarahlutir, og leikföng. Endurunnið ABS korn eru notuð til að framleiða rafrænar vöruskeljar, bílavarahlutir, og sprautumótaðir íhlutir.

Framleiðslulínur Zhuoyue endurvinnslukornunar eru hannaðar til að meðhöndla allan ofangreindan plastúrgang, með sérsniðnum búnaðarstillingum til að mæta sérstökum vinnslukröfum mismunandi plasttegunda.

2. Kornunarferli úrgangsplasts endurvinnslu

Kornunarferlið fyrir endurvinnslu úrgangsplasts samanstendur venjulega af nokkrum lykilskrefum: söfnun og flokkun úrgangsplasts, hreinsun, myljandi, þurrkun, extrusion granulation, kælingu, og klippa. Hvert skref gegnir mikilvægu hlutverki við að tryggja gæði endanlegs endurunna korna. Sérstakar ferlibreytur geta verið mismunandi eftir tegund plastúrgangs, hversu mikil mengun er, og æskileg gæði endurunna korna.

2.1 Söfnun og flokkun

Fyrsta skrefið í endurvinnslu kornunarferlinu er söfnun og flokkun plastúrgangs. Úrgangsplasti er safnað úr ýmsum áttum, að meðtöldum heimilum, atvinnugreinar, verslunarstofnanir, og framleiðslulínum. Vegna mikils úrvals plastúrgangs og tilvistar mengunarefna, flokkun er nauðsynleg til að tryggja gæði endurunnar kornanna.

Flokkun er hægt að gera handvirkt eða vélrænt. Handvirk flokkun hentar vel í smærri endurvinnslu og felst í því að aðgreina mismunandi plasttegundir, að fjarlægja aðskotaefni sem ekki eru úr plasti (eins og málmur, pappír, gler, og lífrænan úrgang), og flokkun plasts eftir litum og gæðum. Vélræn flokkun, hins vegar, er hagkvæmara og hentar fyrir stórrekstur, nota tækni eins og þéttleikaaðskilnað (vaskur-flota aðskilnaður), segulmagnaðir aðskilnaður, rafstöðueiginleikar aðskilnaður, og innrauða flokkun til að aðgreina mismunandi plastgerðir og fjarlægja mengunarefni.

Árangursrík flokkun er mikilvæg vegna þess að blanda mismunandi plasttegunda getur leitt til verulegrar minnkunar á frammistöðu endurunna korna.. Til dæmis, blanda PP og PET getur valdið fasaskilnaði við útpressun, sem leiðir til lélegrar mýktar og vélrænna eiginleika kornanna.

2.2 Þrif

Eftir flokkun, plastúrgangurinn er hreinsaður til að fjarlægja yfirborðsmengun eins og óhreinindi, ryki, olíu, feiti, matarleifar, og merkimiða. Hreinsunarferlið felur venjulega í sér nokkur skref:

Forhreinsun: Að fjarlægja stórar aðskotaefni (eins og merkimiða, húfur, og málmbrot) og gróf óhreinindi í gegnum bursta, blása, eða handtínslu.
Þvottur: Leggið plastúrganginn í bleyti í hreinsilausn (venjulega vatn með þvottaefni eða basa) til að fjarlægja olíu, feiti, og matarleifar. Hægt er að nota hræringu eða ultrasonic hreinsun til að auka hreinsunaráhrifin.
Skola: Skolaðu hreinsaða plastið með hreinu vatni til að fjarlægja öll hreinsilausn sem eftir er og mengunarefni.
Afvötnun: Að fjarlægja umframvatn úr hreinsuðu plasti með skilvindu, afvötnunarvélar, eða loftþurrkun til að draga úr rakainnihaldi og auðvelda síðari vinnslu.

Hreinsunaráhrifin hafa bein áhrif á gæði endurunninna korna. Ófullnægjandi hreinsun getur leitt til mengunar á kornunum, hafa áhrif á vinnsluhæfni þeirra og vélrænni eiginleika. Til dæmis, olíu- og fituleifar geta valdið lélegri viðloðun milli plastsameindanna við útpressun, sem leiðir til lágs togstyrks kornanna.

2.3 Myljandi

Eftir hreinsun og afvötnun, plastúrgangurinn er mulinn í litla bita (flögur eða brot) með því að nota crusher. Mölun hjálpar til við að auka yfirborð plastsins, auðveldar bráðnun og blöndun meðan á útpressunarferlinu stendur. Það hjálpar einnig til við að fjarlægja öll lítil mengunarefni sem eftir eru sem kunna að vera felld inn í plastið.

Gerð mulningsvélarinnar sem notuð er fer eftir gerð og formi plastúrgangs. Algengar gerðir af crushers eru kjálka crushers, hamarkrossar, blaðkrossar, og kyrningavélar. Fyrir sveigjanlegt plastefni (eins og plastfilmur og -pokar), blaðkrossar eru venjulega notaðir, en fyrir stíft plast (eins og plastflöskur og ílát), hamarkrossar eða kjálkakrossar henta betur. Stærð muldu plastbitanna er venjulega á milli 5 mm og 20 mm, fer eftir tegund extruder sem notuð er og æskilegri kornstærð.

2.4 Þurrkun

Jafnvel eftir afvötnun, möluðu plaststykkin geta samt innihaldið ákveðinn raka. Hátt rakainnihald getur leitt til galla eins og loftbólur, sprungur, og léleg yfirborðsgæði í endurunnum kornunum við útpressun. Þess vegna, Þurrkunarskref er nauðsynlegt til að draga úr rakainnihaldi mulnu plastbitanna niður í viðunandi magn (venjulega fyrir neðan 0.5%).

Algengar þurrkunaraðferðir eru þurrkun með heitu lofti, tómarúmþurrkun, og innrauða þurrkun. Heitt loftþurrkun er mest notaða aðferðin, sem felur í sér að heitt loft berst (við 80-120°C hita) í gegnum muldu plaststykkin til að gufa upp raka. Þurrkunartíminn og hitastigið fer eftir tegund plasts og upphaflegu rakainnihaldi. Til dæmis, PET er næmari fyrir raka og krefst hærra þurrkunarhita (120-160°C) og lengri þurrkunartíma til að tryggja fullkomlega rakahreinsun.

2.5 Extrusion Granulation

Extrusion granulation er kjarnaþrepið í úrgangsplast endurvinnslu korna ferli. Það felur í sér bráðnun, blöndun, og einsleitu þurrkuðu muldu plastbitana með því að nota pressuvél, þrýsta síðan bráðna plastinu út í gegnum mótun til að mynda samfellda þræði, sem síðan eru kæld og skorin í einsleit korn.

Extruderinn er lykilbúnaðurinn í þessu skrefi, og árangur þess ákvarðar beint gæði og skilvirkni kornunarferlisins. Það eru tvær megingerðir af pressuvélum sem notaðar eru við endurvinnslu úrgangsplasts: tveggja skrúfa extruders og eins skrúfa extruders. Hver tegund hefur sína kosti og hentar fyrir mismunandi gerðir af úrgangsplasti, eins og lýst er í kafla 3.

Við extrusion granulation, Það þarf að stjórna nokkrum lykilferlisbreytum nákvæmlega:

Hitastig: Hitastig extruder tunnu og deyja er mikilvægt til að bræða plastið og tryggja góða blöndun og einsleitni. Mismunandi gerðir af plasti hafa mismunandi bræðslumark, og hitastig tunnu er venjulega stillt 10-30°C yfir bræðslumarki plastsins til að tryggja fullkomna bráðnun. Til dæmis, tunnuhitinn fyrir PP er venjulega 170-220°C, en fyrir PET er það 260-280°C. Of hátt hitastig getur valdið varma niðurbroti plastsins, sem leiðir til minnkunar á vélrænni eiginleikum endurunna korna, á meðan of lágt hitastig getur valdið ófullkominni bráðnun og lélegri blöndun.
Skurhlutfall: Skurhraði ræðst af skrúfuhraða og skrúfuhönnun. Hentugur klippihlutfall hjálpar til við að gera bráðna plastið einsleitt, dreifa öllum mengunarefnum sem eftir eru, og bæta mýktleika kornanna. Hins vegar, of hár klippihlutfall getur valdið vélrænni niðurbroti á sameindabyggingu plastsins, sem leiðir til skertrar frammistöðu.
Skrúfuhraði: Skrúfuhraði hefur áhrif á afköst, bræðslu skilvirkni, og blöndunargæði. Hærri skrúfuhraði getur aukið afköst en getur dregið úr bræðslu- og blöndunarvirkni, á meðan lægri skrúfuhraði getur bætt blöndunargæði en dregið úr afköstum. Besti skrúfuhraði fer eftir tegund plasts, the extruder type, and the desired granule quality.
Útpressunarþrýstingur: The extrusion pressure is determined by the die design, skrúfa hraða, and material viscosity. Stable extrusion pressure ensures uniform strand formation and consistent granule size. Excessively high pressure can cause die blockage, while excessively low pressure can result in uneven strands.

2.6 Kæling og klipping

After extrusion through the die, the continuous plastic strands are cooled to solidify them. Cooling can be done using air cooling or water cooling. Water cooling is more efficient and is widely used in large-scale granulation operations, involving passing the strands through a water tank or water spray to quickly cool them to room temperature. Air cooling is suitable for small-scale operations or for plastics that are sensitive to water (eins og sumt verkfræðiplastefni).

Once the strands are cooled and solidified, þau eru skorin í einsleit korn með því að nota köggla. Kögglavélin er venjulega sett upp við útgang kælikerfisins og hægt er að stilla hann til að stjórna lengd kornanna (venjulega á milli 2mm og 5mm). Algengar tegundir kögglagerðar eru meðal annars strandkögglar, vatnshringa kögglavélar, og neðansjávarkögglavélar. Strandkögglavélar eru mest notuð tegundin til að endurvinna úrgangsplast, þar sem þau eru einföld í uppbyggingu, auðvelt í notkun, og hentar fyrir flestar tegundir plasts.

2.7 Skimun og pökkun

Eftir klippingu, endurunnið kyrni er skimað með titringsskjá til að fjarlægja allt of stór eða undirstærð korn, tryggja samræmda kornastærð. Skimuðu kornin eru síðan þurrkuð aftur (ef þörf krefur) til að fjarlægja allan raka sem frásogast við kælingu, then packaged into bags or bulk containers for storage and transportation.

Packaging is an important step to prevent contamination and moisture absorption of the recycled granules. The packaging materials should be moisture-proof and clean, and the granules should be stored in a dry, ventilated, and clean warehouse to maintain their quality.

3. Extruder Selection for Waste Plastic Recycling Granulation

Eins og fyrr segir, the extruder is the core equipment in the waste plastic recycling granulation process. The selection of the right extruder depends on the type of waste plastic, the desired granule quality, the production volume, and the budget. Það eru tvær megingerðir af pressuvélum sem notaðar eru við endurvinnslu úrgangsplasts: tveggja skrúfa extruders og eins skrúfa extruders. Each type has its own unique advantages and is suitable for different applications.

3.1 Twin-screw Extruders for Recycling Granulation

Twin-screw extruders are widely used in the recycling granulation of engineering plastics and plastics with high contamination levels, eins og ABS, PS, og PET. They consist of two parallel screws that rotate in the same direction (samsnúningur) eða gagnstæðar áttir (gagnsnúningur) within a barrel. Co-rotating twin-screw extruders are more commonly used in plastic recycling due to their superior mixing and conveying capabilities.

3.1.1 Key Advantages of Twin-screw Extruders

Easy Material Feeding: Twin-screw extruders have a strong conveying capacity, which allows for easy feeding of crushed plastic pieces, even if they are irregular in shape or have a certain amount of contaminants. This reduces the need for pre-processing of the material and improves production efficiency.
Short Material Residence Time: The residence time of the material in the twin-screw extruder is short (venjulega 1-5 mínútur) compared to single-screw extruders. This helps to avoid thermal degradation of the plastic, especially for heat-sensitive plastics such as PET and ABS, which can degrade easily when exposed to high temperatures for a long time. Short residence time also reduces energy consumption and improves production efficiency.
Excellent Venting Effect: Twin-screw extruders are equipped with venting ports that allow for the removal of moisture, volatile gases, and air from the molten plastic. The meshing part of the screws provides effective mixing, and the self-cleaning function of the venting section ensures that the material can achieve complete surface renewal, allowing for efficient removal of volatile substances. This helps to improve the quality of the recycled granules by reducing the number of bubbles and defects.
Superior Mixing and Plasticizing Effect: The co-rotating twin-screw extruders have strong shear and mixing capabilities, which can effectively homogenize the molten plastic, disperse contaminants, and mix additives (eins og sveiflujöfnun, andoxunarefni, and colorants) uniformly. This ensures that the recycled granules have consistent properties and good processability.
Low Specific Power Consumption: Despite their high performance, twin-screw extruders have low specific power consumption (power consumption per unit output), making them more energy-efficient compared to single-screw extruders for certain applications. This helps to reduce operating costs for recycling enterprises.
High Volume Power: Twin-screw extruders have a high volume power (power per unit volume of the barrel), which means they can process a large amount of material in a small space. This makes them suitable for large-scale production operations with limited space.

3.1.2 Suitable Applications for Twin-screw Extruders

Twin-screw extruders are particularly suitable for the recycling granulation of the following plastics:

ABS: A high-performance plastic that is widely used in electronic products, bílavarahlutir, og leikföng. ABS is sensitive to heat and requires short residence time and good mixing, making twin-screw extruders the ideal choice.
PS: Both rigid and foam PS can be recycled using twin-screw extruders. The superior mixing capabilities of twin-screw extruders help to disperse any remaining foam cells and contaminants, ensuring good granule quality.
PET: PET is highly sensitive to moisture and heat, and requires precise temperature control and short residence time. Twin-screw extruders with good venting and temperature control capabilities are suitable for PET recycling granulation.
Verkfræðiplast: Other engineering plastics such as PC (Pólýkarbónat), PA (Pólýamíð), and POM (Pólýoxýmetýlen) can also be recycled using twin-screw extruders, thanks to their superior mixing and plasticizing capabilities.

3.2 Single-screw Extruders for Recycling Granulation

Single-screw extruders are simpler in structure, lower in cost, and easier to maintain compared to twin-screw extruders. They consist of a single screw that rotates within a barrel, conveying and melting the material through friction and shear between the screw and the barrel. Single-screw extruders are widely used in the recycling granulation of general-purpose plastics such as PP, PE, and LDPE.

3.2.1 Key Advantages of Single-screw Extruders

Short Screw Length and Residence Time: Single-screw extruders typically have a shorter screw length compared to twin-screw extruders, resulting in shorter material residence time. This helps to avoid thermal degradation of the plastic, especially for soft plastics such as PE and LDPE, which have lower melting points and are prone to degradation.
Hagkvæmt: Waste plastic recycling often involves materials with high levels of contaminants, which can cause significant wear and tear on the extruder screw and barrel. Single-screw extruders are simpler in structure and use less expensive materials, making them more cost-effective to replace and maintain compared to twin-screw extruders. This is particularly important for small and medium-sized recycling enterprises with limited budgets.
Suitable for Soft Plastics: The material conveying efficiency of single-screw extruders depends on the friction performance of the solid material and the viscosity of the melt. Soft plastics such as PP, PE, and LDPE have good friction performance and low melt viscosity, making them ideal for processing with single-screw extruders. These plastics can be conveyed and melted efficiently, ensuring good granule quality.
Simple Operation and Maintenance: Single-screw extruders have a simple structure, with fewer moving parts, making them easy to operate and maintain. This reduces the need for skilled operators and lowers maintenance costs, which is beneficial for small-scale recycling operations.

3.2.2 Suitable Applications for Single-screw Extruders

Single-screw extruders are particularly suitable for the recycling granulation of the following plastics:

PP (Pólýprópýlen): PP is a soft plastic with good friction performance and processability, making it ideal for processing with single-screw extruders. Recycled PP granules produced using single-screw extruders have good mechanical properties and can be used in a wide range of applications.
PE (Pólýetýlen): Both LDPE and HDPE are suitable for processing with single-screw extruders. LDPE, sérstaklega, is a soft plastic with low melt viscosity, which can be conveyed and melted efficiently by single-screw extruders. Recycled PE granules are widely used in the production of plastic films and pipes.
LDPE (Lágþéttni pólýetýlen): LDPE is commonly used in plastic films and bags, which are easy to crush and process. Single-screw extruders are ideal for LDPE recycling granulation, as they can handle the soft material efficiently and cost-effectively.

3.3 Key Factors for Extruder Selection

When selecting an extruder for waste plastic recycling granulation, the following key factors should be considered:

Type of Waste Plastic: As discussed earlier, twin-screw extruders are suitable for engineering plastics (ABS, PS, PET) and plastics with high contamination levels, while single-screw extruders are suitable for general-purpose plastics (PP, PE, LDPE).
Framleiðslumagn: For large-scale production (more than 500kg/h), twin-screw extruders are more suitable due to their high throughput and efficiency. For small-scale production (less than 200kg/h), single-screw extruders are more cost-effective and practical.
Granule Quality Requirements: If high-quality recycled granules with uniform properties and low contamination are required (such as for automotive parts and electronic products), twin-screw extruders are the better choice due to their superior mixing and plasticizing capabilities. For general-purpose applications (such as plastic films and low-grade injection-molded products), single-screw extruders can meet the requirements at a lower cost.
Fjárhagsáætlun: Twin-screw extruders are more expensive than single-screw extruders, both in terms of initial investment and maintenance costs. Þess vegna, enterprises with limited budgets may prefer single-screw extruders for general-purpose plastic recycling.
Orkunotkun: For large-scale production, energy consumption is an important consideration. Twin-screw extruders have lower specific power consumption, making them more energy-efficient for high-volume operations. Single-screw extruders may be more energy-efficient for small-scale operations due to their simpler structure.

4. Zhuoyue Extruder Series for Waste Plastic Recycling Granulation

Zhuoyue offers a comprehensive range of extruders specifically designed for waste plastic recycling granulation, including twin-screw extruders and single-screw extruders. The extruder series are tailored to meet the specific needs of different types of waste plastics, production volumes, and granule quality requirements, combining high performance, skilvirkni, orkusparandi, og hagkvæmni. The main extruder series include ZTE series and HTE series, each with unique features and advantages to suit different application scenarios.

4.1 Core Technical Features of Zhuoyue Extruders

All Zhuoyue extruders for waste plastic recycling granulation share a set of core technical features that make them ideal for the harsh conditions of plastic recycling, such as high contamination levels, irregular material shapes, and varying material properties:

Robust Construction: Zhuoyue extruders are built with high-quality materials (such as alloy steel for screws and barrels) to withstand the wear and tear caused by contaminants in waste plastics. The screws and barrels are treated with special surface treatments (such as nitriding and hard chrome plating) to improve their wear resistance and service life.
Nákvæm hitastýring: The extruders are equipped with advanced temperature control systems, including heating zones and cooling zones, to ensure precise control of the barrel and die temperature. This helps to avoid thermal degradation of the plastic and ensure complete melting and mixing.
Efficient Conveying and Mixing: The screw designs are optimized for waste plastic recycling, with enhanced conveying capacity and mixing capabilities. Twin-screw extruders feature co-rotating screws with optimized flight profiles to ensure superior mixing and homogenization, while single-screw extruders have specially designed screws to improve conveying efficiency for soft plastics.
Excellent Venting Performance: Twin-screw extruders are equipped with multiple venting ports to remove moisture, volatile gases, and air from the molten plastic, ensuring high-quality granules with minimal defects. The self-cleaning function of the venting section ensures efficient venting even with contaminated materials.
Orkusparandi hönnun: Zhuoyue extruders adopt energy-saving technologies such as variable frequency drives (VFD) and optimized motor configurations to reduce energy consumption. This helps to lower operating costs for recycling enterprises.
Easy Operation and Maintenance: The extruders are designed with user-friendly interfaces and simple structures, making them easy to operate and maintain. The screws and barrels can be easily disassembled for cleaning and replacement, draga úr niður í miðbæ.
Customizable Configurations: Zhuoyue extruders can be customized with different screw lengths, diameters, and configurations to meet the specific needs of different types of waste plastics and production volumes. Til dæmis, extruders for PET recycling can be equipped with special drying systems and venting ports to ensure complete moisture removal.

4.2 ZTE Series Extruders

The ZTE series is Zhuoyue’s cost-effective extruder series, designed for small and medium-sized recycling enterprises and general-purpose waste plastic recycling granulation. This series offers excellent cost-performance ratio, with parameters designed to suit most common waste plastics, þar á meðal PP, PE, LDPE, and general-purpose ABS and PS. The ZTE series includes both single-screw and twin-screw extruders, providing flexible options for different applications.

4.2.1 Key Features of ZTE Series Extruders

Excellent Cost-Performance Ratio: The ZTE series is designed to provide reliable performance at a competitive price, making it the ideal choice for enterprises with limited budgets or small-scale production needs. The initial investment and maintenance costs are significantly lower than high-end extruders, while still meeting the basic requirements of waste plastic recycling granulation.
Versatile Parameter Design: The parameters of the ZTE series are designed to suit most common waste plastics, þar á meðal PP, PE, LDPE, ABS, og PS. This versatility allows enterprises to process multiple types of waste plastics with a single extruder, improving production flexibility and reducing equipment investment.
Reliable Operation: The ZTE series adopts a reliable standard transmission system and simple structure, ensuring stable operation even in harsh recycling environments. The screws and barrels are designed to handle contaminants in waste plastics, reducing the risk of equipment failure.
Low Maintenance Costs: The simple structure of the ZTE series makes it easy to maintain, with fewer moving parts and lower maintenance requirements. The screws and barrels can be easily replaced when worn, draga úr niður í miðbæ og viðhaldskostnað.
Suitable for Small to Medium-Scale Production: The ZTE series is available in a range of sizes, with throughputs ranging from 50kg/h to 500kg/h, making it suitable for small to medium-scale recycling operations.

4.2.2 ZTE Series Model Parameters

The ZTE series includes both single-screw and twin-screw extruders, with parameters tailored to different types of waste plastics. The following table details the parameters of the ZTE series twin-screw extruders, suitable for ABS, PS, and PET recycling granulation:

Fyrirmynd	Sérstakt tog（N.m/Cm³）	Aðalvélarafl (Kw)	Output speed（rpm）	Slot depth ratio D0/Di	Suitable Plastics
25	6	7.5	600	1.55	PS, Small-scale ABS
35	6	18.5	600	1.55	PS, ABS, LDPE
50	6	55	600	1.55/1.68	ABS, PS, PET (Small-scale)
65	6	110	600	1.55/1.68	ABS, PS, PET
75	6	160	600	1.55/1.68	ABS, PS, PET, PP
95	6	300	600	1.55/1.68	ABS, PS, PET, PP, PE

The ZTE series single-screw extruders are mainly used for PP, PE, and LDPE recycling granulation, with parameters optimized for soft plastics. The screws are designed with enhanced conveying capacity to handle the irregular shapes of crushed plastic films and bottles, ensuring efficient production.

4.2.3 Application Scenarios for ZTE Series

The ZTE series is ideal for the following application scenarios:

Small and medium-sized recycling enterprises with limited budgets.
General-purpose waste plastic recycling, þar á meðal PP, PE, LDPE, ABS, og PS.
Production of general-purpose recycled granules for plastic films, low-grade injection-molded products, and construction components.
Enterprises new to plastic recycling, thanks to the easy operation and low maintenance requirements of the ZTE series.

4.3 HTE Series Extruders

The HTE series is Zhuoyue’s mid-range extruder series, designed to bridge the gap between cost-effective extruders (such as ZTE series) and high-end extruders. This series combines high performance with high cost-effectiveness, delivering higher output while reducing energy consumption. The HTE series includes both twin-screw and single-screw extruders, suitable for medium to large-scale waste plastic recycling granulation.

4.3.1 Key Features of HTE Series Extruders

Balanced Performance and Cost-Effectiveness: The HTE series offers higher performance than the ZTE series, including better mixing capabilities, meiri afköst, and more precise temperature control, while maintaining a competitive price. This makes it suitable for enterprises that require higher granule quality but do not want to invest in high-end extruders.
Energy-Saving and High Output: The HTE series is optimized for energy efficiency, with advanced motor configurations and variable frequency drives (VFD) to reduce energy consumption. Á sama tíma, the extruders have higher throughput, allowing for medium to large-scale production (500kg/h to 1000kg/h) with lower energy costs.
Reasonable Torque and Power Configuration: The HTE series has a reasonable torque and power configuration, ensuring stable and efficient production even when processing plastics with high contamination levels or varying properties. The twin-screw extruders have higher torque density, making them suitable for processing engineering plastics such as ABS and PET, while the single-screw extruders are optimized for soft plastics such as PP and PE.
Dual-Speed Options for Partial Models: Some models of the HTE series are equipped with dual-speed options, allowing for flexible adjustment of the screw speed to suit different types of plastics and production requirements. This expands the application range of the extruders, making them suitable for multiple plastic types.
Enhanced Wear Resistance: The screws and barrels of the HTE series are made of high-quality alloy steel and treated with advanced surface treatments to improve their wear resistance, ensuring a long service life even in harsh recycling environments.
Advanced Control System: The HTE series is equipped with advanced PLC control systems, allowing for automatic control of temperature, skrúfa hraða, extrusion þrýstingur, and other key parameters. This improves the stability and consistency of the granulation process, ensuring uniform granule quality.

4.3.2 HTE Series Model Parameters

The HTE series twin-screw extruders are suitable for ABS, PS, PET, PP, PE, and LDPE recycling granulation, with parameters optimized for high performance and efficiency. The following table details the specific parameters:

Fyrirmynd	Sérstakt tog（N.m/Cm³）	Aðalvélarafl (Kw)	Output speed（rpm）	Slot depth ratio D0/Di	Suitable Plastics	Afköst (kg/klst)
25	9	11	600	1.55	PS, ABS, LDPE	50-100
35	9	30	600	1.55	PS, ABS, PE, LDPE	100-200
35	9	45	1000	1.55	PS, ABS, PE, LDPE	200-300
50	9	75	600	1.55/1.68	ABS, PS, PET, PP	300-500
50	9	110	900	1.55/1.68	ABS, PS, PET, PP	500-700
65	9	160	600	1.55/1.68	ABS, PS, PET, PP, PE	700-900
65	9	220	900	1.55/1.68	ABS, PS, PET, PP, PE	900-1200
75	9	250	600	1.55/1.68	ABS, PS, PET, PP, PE, LDPE	1200-1500
75	9	315	900	1.55/1.68	ABS, PS, PET, PP, PE, LDPE	1500-1800
95	9	400	600	1.55/1.68	All common waste plastics	1800-2200

The HTE series single-screw extruders are optimized for PP, PE, and LDPE recycling granulation, with higher throughput and better energy efficiency compared to the ZTE series. They are suitable for medium to large-scale production of recycled granules for plastic films, rör, og sprautumótaðar vörur.

4.3.3 Application Scenarios for HTE Series

The HTE series is ideal for the following application scenarios:

Medium to large-scale recycling enterprises with higher granule quality requirements.
Recycling of multiple types of waste plastics, þar á meðal PP, PE, LDPE, ABS, PS, og PET.
Production of high-quality recycled granules for automotive parts, electronic product accessories, and high-grade injection-molded products.
Enterprises that focus on energy efficiency and cost reduction, thanks to the energy-saving design of the HTE series.

4.4 Customized Solutions from Zhuoyue

In addition to the standard ZTE and HTE series, Zhuoyue also provides customized extruder solutions for special waste plastic recycling needs. Til dæmis:

Customized extruders for high-contamination waste plastics, equipped with enhanced filtering systems to remove contaminants.
Extruders for heat-sensitive plastics such as PET and PC, equipped with special drying systems and low-shear screws to avoid thermal degradation.
Complete recycling granulation production lines, including crushers, þurrkara, extruders, kögglavélar, and screening equipment, to provide a one-stop solution for enterprises.

Zhuoyue’s professional R&D team works closely with customers to understand their specific needs and provide tailored solutions that meet their production requirements and budget.

5. Best Practices for Waste Plastic Recycling Granulation with Zhuoyue Extruders

To ensure the best performance and granule quality when using Zhuoyue extruders for waste plastic recycling granulation, the following best practices are recommended:

5.1 Proper Sorting and Cleaning

Effective sorting and cleaning are essential to reduce the wear and tear on the extruder and ensure high-quality granules. Separate different types of plastics to avoid mixing, and remove non-plastic contaminants (eins og málmur, pappír, and glass) as much as possible. Thoroughly clean the waste plastics to remove oil, feiti, og matarleifar, which can affect the mixing and plasticizing effect.

5.2 Optimal Drying

Ensure that the crushed plastic pieces are properly dried to reduce the moisture content to below 0.5%. For moisture-sensitive plastics such as PET, use high-temperature drying (120-160°C) for a sufficient period to ensure complete moisture removal. This helps to avoid bubbles and defects in the recycled granules.

5.3 Precise Process Parameter Control

Adjust the extruder parameters (such as temperature, skrúfa hraða, og útpressunarþrýstingur) according to the type of waste plastic. Follow the recommended parameter settings provided by Zhuoyue, and make adjustments based on the actual material properties and granule quality. Avoid excessively high temperatures or shear rates, which can cause plastic degradation.

5.4 Regular Maintenance

Regularly inspect and maintain the extruder to ensure its normal operation. Clean the screws and barrels regularly to remove any accumulated material or contaminants. Check the wear of the screws and barrels, and replace them when necessary. Lubricate the moving parts regularly to reduce friction and extend the service life of the extruder.

5.5 Use of Additives (If Necessary)

For waste plastics with severe degradation or poor performance, consider adding additives such as stabilizers, andoxunarefni, and plasticizers to improve the quality of the recycled granules. Consult Zhuoyue’s technical team to select the appropriate additives and dosage.

6. Niðurstaða

Waste plastic recycling granulation is a critical technology for realizing resource circulation and environmental protection, offering significant economic, umhverfismál, and social benefits. The quality and efficiency of the granulation process depend largely on the extruder used, and selecting the right extruder is essential for the success of a plastic recycling enterprise.

Zhuoyue’s ZTE series and HTE series extruders are specifically designed for waste plastic recycling granulation, combining high performance, skilvirkni, orkusparandi, og hagkvæmni. The ZTE series provides a cost-effective solution for small and medium-sized enterprises and general-purpose plastic recycling, while the HTE series offers balanced performance and cost-effectiveness for medium to large-scale production with higher quality requirements. With robust construction, nákvæm hitastýring, superior mixing capabilities, and customizable configurations, Zhuoyue extruders can handle all types of waste plastics, from PP and PE to ABS and PET, delivering high-quality recycled granules for a wide range of applications.

As a leader in extrusion technology, Zhuoyue is committed to providing advanced, áreiðanlegur, and cost-effective solutions for the plastic recycling industry. With professional R&D, high-quality products, and comprehensive after-sales service, Zhuoyue helps enterprises unlock the full potential of waste plastic recycling, contributing to a more sustainable and environmentally friendly future.

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