To ti ni ilọsiwaju Ṣiṣu atunlo granulation: Imọ ọna ẹrọ, Ohun elo ati Zhuoyue Extruder Solutions

Ni akoko ti jijẹ imọ ayika ati awọn eto imulo itọju awọn orisun to lagbara, atunlo ṣiṣu ti di idojukọ pataki fun awọn ile-iṣẹ agbaye. Lara awọn oriṣiriṣi awọn imọ-ẹrọ atunlo ṣiṣu, egbin ṣiṣu atunlo granulation duro jade bi a wulo, daradara, ati ọna ti iṣuna ọrọ-aje ti o yipada awọn ohun elo ṣiṣu ti a sọnù sinu awọn granules ti a tun lo. Awọn granules ti a tunlo wọnyi le ṣe ilọsiwaju siwaju si awọn ọja ṣiṣu tuntun, pẹlu awọn ipele iṣẹ ti o ṣe afiwe si awọn ti a ṣe lati awọn ohun elo wundia, nitorinaa riri kaakiri awọn oluşewadi otitọ ati idinku ẹru ayika ti o ṣẹlẹ nipasẹ egbin ṣiṣu.

Zhuoyue, a asiwaju olupese ti extrusion ẹrọ, ti pinnu lati pese awọn laini iṣelọpọ granulation atunlo okeerẹ fun gbogbo iru awọn pilasitik egbin, pẹlu PP (Polypropylene), PE (Polyethylene), LDPE (Kekere-iwuwo Polyethylene), PET (Polyethylene Terephthalate), PS (Polystyrene), ABS (Acrylonitrile Butadiene Styrene), ati siwaju sii. Pẹlu imọ-ẹrọ extrusion ilọsiwaju ati imọ-jinlẹ ni atunlo ṣiṣu, Awọn extruders Zhuoyue ni a ṣe deede lati pade awọn italaya alailẹgbẹ ti granulation ṣiṣu egbin, ifijiṣẹ daradara, fifipamọ agbara, ati awọn solusan didara ga fun awọn ile-iṣẹ ti n ṣiṣẹ ni atunlo ṣiṣu.

1. Akopọ ti Egbin Ṣiṣu atunlo Granulation

granulation atunlo ṣiṣu egbin jẹ ilana amọja ti o ṣe iyipada awọn ọna oriṣiriṣi ti awọn pilasitik egbin—gẹgẹbi awọn igo ṣiṣu, awọn fiimu, awọn apoti, ajeku lati gbóògì ila, ati lẹhin-olumulo ṣiṣu egbin-sinu aṣọ, awọn granules ṣiṣu ti o ni agbara ti o ga julọ nipasẹ lẹsẹsẹ ti ẹrọ ati awọn itọju igbona. Awọn granules ti a tunlo wọnyi, tun mo bi regranulates tabi reprocessed ṣiṣu pellets, le ti wa ni taara lo ni abẹrẹ igbáti, extrusion, fe igbáti, ati awọn miiran ṣiṣu processing ọna lati gbe awọn titun awọn ọja, orisirisi lati awọn ohun elo iṣakojọpọ ati awọn paati ikole si awọn ẹya ọkọ ayọkẹlẹ ati awọn iwulo ojoojumọ.

Iye pataki ti granulation ṣiṣu atunlo egbin wa ni agbara rẹ lati koju awọn italaya meji ti isọnu egbin ṣiṣu ati aito awọn orisun. Ko dabi awọn ọna isọnu pilasitik idalẹnu ti aṣa gẹgẹbi sisọ ilẹ ati sisun, eyiti o fa awọn eewu ayika ti o lagbara, atunlo granulation se aseyori otito atunlo awọn oluşewadi:

Idaabobo Ayika: Ibalẹ ti idoti ṣiṣu gba awọn orisun ilẹ ti o niyelori ati pe o le ja si ile ati idoti omi inu ile, bi awọn pilasitik ti kii ṣe biodegradable ati pe o le tu awọn nkan ipalara silẹ ni akoko pupọ. Isunmọ, ti a ba tun wo lo, nmu awọn gaasi oloro jade (gẹgẹbi awọn dioxins ati erogba monoxide) ati particulate ọrọ, idasi si idoti afẹfẹ ati imorusi agbaye. Atunlo granulation dinku iye idoti ṣiṣu ti nwọle awọn ibi idalẹnu ati awọn incinerators, dindinku idoti ayika ati erogba itujade.
Itoju awọn oluşewadi: Awọn pilasitiki ti wa lati awọn epo fosaili ti kii ṣe isọdọtun (gẹgẹbi epo ati gaasi adayeba). Nipa atunlo awọn pilasitik egbin sinu awọn granules atunlo, ibeere fun awọn ohun elo ṣiṣu wundia ti dinku, titọju awọn orisun fosaili ti o niyelori ati idinku agbara agbara ti o ni nkan ṣe pẹlu iṣelọpọ ṣiṣu wundia. A ṣe iṣiro pe atunlo toonu kan ti ṣiṣu le fipamọ to 7.4 awọn agba ti epo ati ki o din erogba itujade nipa 1.5 toonu.
Awọn anfani aje: Awọn granules ṣiṣu ti a tunlo jẹ din owo pupọ ju awọn ohun elo ṣiṣu wundia lọ, laimu idaran ti iye owo ifowopamọ fun awọn olupese. Fun atunlo katakara, ilana ti gbigba, processing, ati granulating egbin pilasitik le se ina idurosinsin ere, ṣiṣẹda titun aje anfani ati oojọ awọn ipo. Ni afikun, ọpọlọpọ awọn orilẹ-ede ati awọn agbegbe nfunni ni awọn iwuri eto imulo (gẹgẹbi awọn ifunni ati awọn fifọ owo-ori) fun ṣiṣu atunlo katakara, siwaju igbelaruge awọn aje ṣiṣeeṣe ti atunlo granulation.

Sibẹsibẹ, Didara awọn granules ṣiṣu ti a tunlo ati iṣẹ ti awọn ọja ti a tunṣe ti ipari jẹ igbẹkẹle pupọ lori ilana granulation ati ẹrọ ti a lo.. Awọn okunfa bii iru ati mimọ ti ṣiṣu egbin, awọn ṣiṣe ti ayokuro ati ninu, iwọn otutu ati iṣakoso rirun nigba extrusion, ati awọn apẹrẹ ti extruder gbogbo ni ipa pataki lori didara ọja ikẹhin. Nitorina, sese kan ti o rọrun, rọrun, daradara, fifipamọ agbara, ore ayika, ati ilana granulation ti iṣuna ọrọ-aje ti di idojukọ ti iwadii ati idagbasoke ni ile-iṣẹ atunlo ṣiṣu.

1.1 Awọn abuda bọtini ti awọn granules ṣiṣu Tunlo

Išẹ ti awọn granules ṣiṣu ti a tunlo ni ibatan pẹkipẹki si iru ṣiṣu egbin, ìyí ti koto, ati ilana granulation. Ni Gbogbogbo, Awọn granules atunlo didara to gaju yẹ ki o ni awọn abuda wọnyi:

Aṣọ patiku Iwon: Iwọn patiku deede ṣe idaniloju ifunni iduroṣinṣin lakoko sisẹ atẹle (gẹgẹ bi awọn abẹrẹ igbáti ati extrusion), imudarasi iṣọkan ati didara ọja ikẹhin. Iwọn patiku ti awọn granules ti a tunlo jẹ deede laarin 2mm ati 5mm, da lori awọn ibeere ohun elo.
Kekere Kokoro: Awọn apanirun gẹgẹbi idọti, eruku, irin ajẹkù, iwe, ati awọn ohun elo miiran ti kii ṣe ṣiṣu le ni ipa pataki iṣẹ ti awọn granules ti a tunlo ati ọja ikẹhin. Nitorina, tito lẹsẹsẹ ti o munadoko ati mimọ ti ṣiṣu egbin jẹ pataki lati rii daju awọn ipele idoti kekere.
Ti o dara Plasticity ati Processability: Awọn granules ti a tunlo yẹ ki o ni awọn ohun-ini yo ti o dara ati agbara sisan, gbigba fun irọrun sisẹ sinu awọn ọja tuntun laisi ni ipa ṣiṣe ṣiṣe tabi didara ọja. Eyi nilo iṣakoso deede ti iwọn otutu ati oṣuwọn rirẹ lakoko ilana granulation lati yago fun ibajẹ pupọ ti ilana molikula ṣiṣu..
Idurosinsin darí Properties: Agbara fifẹ, elongation ni Bireki, agbara ipa, ati awọn ohun-ini ẹrọ miiran ti awọn granules ti a tunlo yẹ ki o sunmọ bi o ti ṣee ṣe si awọn ohun elo wundia, ni idaniloju pe awọn ọja atunlo ikẹhin pade awọn iṣedede iṣẹ ṣiṣe ti a beere.
Kekere Ọrinrin akoonu: Akoonu ọrinrin giga ni awọn granules ti a tunlo le ja si awọn abawọn gẹgẹbi awọn nyoju ati awọn dojuijako ni ọja ikẹhin lakoko sisẹ.. Nitorina, Awọn igbesẹ gbigbe ni a nilo nigbagbogbo lakoko ilana granulation lati dinku akoonu ọrinrin si ipele itẹwọgba (ojo melo ni isalẹ 0.5%).

1.2 Awọn oriṣi wọpọ ti Awọn pilasitik egbin fun granulation

Fere gbogbo awọn oriṣi awọn pilasitik thermoplastic le jẹ atunlo ati granulated, nigba ti thermosetting pilasitik (eyi ti ko le wa ni yo ati reprocessed) ko dara fun atunlo granulation. Awọn oriṣi ti o wọpọ julọ ti awọn pilasitik egbin ti a lo ninu granulation atunlo pẹlu:

PP (Polypropylene): thermoplastic ti a lo pupọ pẹlu resistance kemikali to dara, darí-ini, ati processing. Egbin ti o wọpọ PP pẹlu awọn buckets ṣiṣu, awọn apoti, awọn fila, ati awọn ajeku iṣelọpọ. Awọn granules PP ti a tunlo ni igbagbogbo lo lati ṣe awọn paipu ṣiṣu, auto awọn ẹya ara, ati awọn ohun elo apoti.
PE (Polyethylene): Pin si LDPE (Kekere-iwuwo Polyethylene) ati HDPE (Polyethylene iwuwo giga). LDPE jẹ lilo pupọ ni awọn fiimu ṣiṣu, baagi, ati awọn igo, nigba ti HDPE lo ninu awọn agba, paipu, ati awọn apoti. Awọn granules PE ti a tunlo jẹ o dara fun iṣelọpọ awọn fiimu ṣiṣu, paipu, ati awọn ọja ti o ni abẹrẹ.
PET (Polyethylene Terephthalate): A sihin, ṣiṣu kosemi commonly lo ninu nkanmimu igo, apoti ounje, ati okun awọn ọja. Awọn granules PET ti a tunlo jẹ lilo pupọ ni iṣelọpọ awọn okun polyester, ṣiṣu igo, ati awọn ohun elo apoti.
PS (Polystyrene): Wa ni kosemi (gẹgẹbi awọn agolo foomu, ounje awọn apoti, ati ṣiṣu isere) ati foomu (EPS, ti fẹ polystyrene) awọn fọọmu. Awọn granules PS ti a tunlo le ṣee lo lati ṣe awọn nkan isere ṣiṣu, ohun ọṣọ ohun elo, ati awọn ọja foomu.
ABS (Acrylonitrile Butadiene Styrene): Pilasitik ti o ga julọ pẹlu agbara ipa to dara, rigidigidi, ati ooru resistance. Egbin ti o wọpọ ABS pẹlu awọn ikarahun ṣiṣu ti awọn ọja itanna, auto awọn ẹya ara, ati awọn nkan isere. Awọn granules ABS ti a tunlo ni a lo lati ṣe awọn ikarahun ọja itanna, auto awọn ẹya ara, ati awọn ẹya ara ti abẹrẹ.

Awọn laini iṣelọpọ granulation atunlo Zhuoyue jẹ apẹrẹ lati mu gbogbo awọn pilasitik egbin ti a mẹnuba loke, pẹlu awọn atunto ohun elo ti a ṣe adani lati pade awọn ibeere sisẹ pato ti awọn iru ṣiṣu oriṣiriṣi.

2. Ilana Atunlo Pilasiti Egbin

Ilana atunlo pilasitik egbin ni igbagbogbo ni ọpọlọpọ awọn igbesẹ bọtini: egbin ṣiṣu gbigba ati ayokuro, ninu, fifun pa, gbigbe, extrusion granulation, itutu agbaiye, ati gige. Igbesẹ kọọkan ṣe ipa pataki ni idaniloju didara awọn granules ti a tunlo ti ikẹhin. Awọn paramita ilana pato le yatọ si da lori iru ṣiṣu egbin, ìyí ti koto, ati didara ti o fẹ ti awọn granules ti a tunlo.

2.1 Gbigba ati Tito lẹsẹẹsẹ

Igbesẹ akọkọ ninu ilana granulation atunlo ni gbigba ati yiyan awọn pilasitik egbin. Awọn pilasitik egbin ni a gba lati awọn orisun oriṣiriṣi, pẹlu ìdílé, awọn ile-iṣẹ, awọn ile-iṣẹ iṣowo, ati gbóògì ila. Nitori ọpọlọpọ awọn pilasitik egbin ati wiwa awọn contaminants, lẹsẹsẹ jẹ pataki lati rii daju pe didara awọn granules ti a tunlo.

Tito lẹsẹẹsẹ le ṣee ṣe pẹlu ọwọ tabi ẹrọ. Yiyan afọwọṣe dara fun awọn iṣẹ atunlo iwọn kekere ati pẹlu yiya sọtọ awọn oriṣiriṣi awọn pilasitik, yiyọ ti kii-ṣiṣu contaminants (bi irin, iwe, gilasi, ati Organic egbin), ati tito awọn pilasitik nipasẹ awọ ati didara. Mechanical ayokuro, ti a ba tun wo lo, jẹ daradara siwaju sii ati pe o dara fun awọn iṣẹ ṣiṣe iwọn-nla, lilo awọn imọ-ẹrọ gẹgẹbi iyapa iwuwo (ifọwọ-leefofo Iyapa), oofa Iyapa, electrostatic Iyapa, ati tito lẹsẹsẹ infurarẹẹdi lati ya awọn oriṣiriṣi ṣiṣu ṣiṣu kuro ki o si yọ awọn idoti kuro.

Tito lẹsẹsẹ ti o munadoko jẹ pataki nitori dapọ awọn oriṣiriṣi awọn pilasitik le ja si idinku nla ninu iṣẹ ti awọn granules ti a tunṣe.. Fun apere, dapọ PP ati PET le fa iyapa alakoso nigba extrusion, Abajade ni ko dara plasticity ati darí-ini ti awọn granules.

2.2 Ninu

Lẹhin tito lẹsẹsẹ, awọn pilasitik egbin ti wa ni ti mọtoto lati yọ dada contaminants bi idoti, eruku, epo, girisi, awọn iṣẹku ounje, ati akole. Ilana mimọ ni igbagbogbo pẹlu awọn igbesẹ pupọ:

Pre-ninu: Yiyọ ti o tobi contaminants (gẹgẹbi awọn akole, awọn fila, ati irin ajẹkù) ati isokuso o dọti nipasẹ brushing, fifun, tabi ọwọ kíkó.
Fifọ: Ríiẹ awọn pilasitik egbin ni ojutu mimọ (nigbagbogbo omi pẹlu detergent tabi alkali) lati yọ epo kuro, girisi, ati awọn iṣẹku ounje. Agitation tabi ultrasonic ninu le ṣee lo lati jẹki ipa mimọ.
Fi omi ṣan: Fi omi ṣan awọn pilasitik ti a sọ di mimọ pẹlu omi mimọ lati yọkuro eyikeyi ojutu mimọ ti o ku ati awọn idoti.
Dewatering: Yiyọ omi pupọ kuro lati awọn pilasitik ti a sọ di mimọ nipa lilo awọn centrifuges, dewatering ero, tabi gbigbe afẹfẹ lati dinku akoonu ọrinrin ati dẹrọ sisẹ atẹle.

Ipa mimọ taara ni ipa lori didara awọn granules ti a tunlo. Aini mimọ le ja si ibajẹ ti awọn granules, ni ipa lori wọn processability ati darí-ini. Fun apere, epo ati awọn iṣẹku girisi le fa adhesion ti ko dara laarin awọn ohun elo ṣiṣu lakoko extrusion, Abajade ni kekere fifẹ agbara ti awọn granules.

2.3 Fípalẹ̀

Lẹhin ti ninu ati dewatering, awọn pilasitik egbin ni a fọ si awọn ege kekere (flakes tabi ajẹkù) lilo a crusher. Crushing iranlọwọ lati mu awọn dada agbegbe ti awọn ṣiṣu, dẹrọ yo ati dapọ nigba ti extrusion ilana. O tun ṣe iranlọwọ lati yọkuro eyikeyi awọn idoti kekere ti o ku ti o le wa ninu ṣiṣu.

Iru crusher ti a lo da lori iru ati fọọmu ti ṣiṣu egbin. Wọpọ orisi ti crushers ni bakan crushers, òòlù crushers, abẹfẹlẹ crushers, ati awọn granulators. Fun rọ pilasitik (gẹgẹbi awọn fiimu ṣiṣu ati awọn baagi), abẹfẹlẹ crushers wa ni ojo melo lo, nigba ti kosemi pilasitik (gẹgẹbi awọn igo ṣiṣu ati awọn apoti), òòlù crushers tabi bakan crushers ni o wa siwaju sii dara. Iwọn awọn ege ṣiṣu ti a fọ jẹ nigbagbogbo laarin 5mm ati 20mm, da lori iru extruder ti a lo ati iwọn granule ti o fẹ.

2.4 Gbigbe

Paapaa lẹhin dewatering, awọn ege ṣiṣu ti a fọ le tun ni iye ọrinrin kan ninu. Akoonu ọrinrin giga le ja si awọn abawọn gẹgẹbi awọn nyoju, dojuijako, ati ko dara dada didara ni tunlo granules nigba extrusion. Nitorina, Igbesẹ gbigbẹ jẹ pataki lati dinku akoonu ọrinrin ti awọn ege ṣiṣu ti a fọ si ipele itẹwọgba (ojo melo ni isalẹ 0.5%).

Awọn ọna gbigbe ti o wọpọ pẹlu gbigbe afẹfẹ gbigbona, igbale gbigbe, ati infurarẹẹdi gbigbe. Gbigbe afẹfẹ gbigbona jẹ ọna ti a lo julọ julọ, eyiti o kan gbigbe afẹfẹ gbigbona kọja (ni iwọn otutu ti 80-120 ° C) nipasẹ awọn itemole ṣiṣu ege lati evaporate awọn ọrinrin. Akoko gbigbe ati iwọn otutu da lori iru ṣiṣu ati akoonu ọrinrin akọkọ. Fun apere, PET jẹ ifarabalẹ si ọrinrin ati pe o nilo awọn iwọn otutu gbigbe ti o ga (120-160°C) ati awọn akoko gbigbe to gun lati rii daju yiyọ ọrinrin pipe.

2.5 Extrusion granulation

Extrusion granulation ni mojuto igbese ni egbin ṣiṣu atunlo granulation ilana. Ó kan yíyọ, dapọ, ati homogenizing awọn dahùn o itemole ṣiṣu ege lilo ohun extruder, ki o si extruding awọn didà ṣiṣu nipasẹ kan kú lati dagba lemọlemọfún strands, eyi ti o ti paradà tutu ati ki o ge sinu aṣọ granules.

Extruder jẹ ohun elo bọtini ni igbesẹ yii, ati iṣẹ rẹ taara pinnu didara ati ṣiṣe ti ilana granulation. Nibẹ ni o wa meji akọkọ orisi ti extruders lo ninu egbin ṣiṣu atunlo granulation: Twin-dabaru extruders ati nikan-dabaru extruders. Iru kọọkan ni awọn anfani tirẹ ati pe o dara fun awọn oriṣiriṣi awọn pilasitik egbin, bi alaye ni Abala 3.

Nigba extrusion granulation, ọpọlọpọ awọn ilana ilana bọtini nilo lati ṣakoso ni deede:

Iwọn otutu: The temperature of the extruder barrel and die is critical for melting the plastic and ensuring good mixing and homogenization. Different types of plastics have different melting points, and the barrel temperature is typically set 10-30°C above the melting point of the plastic to ensure complete melting. Fun apere, the barrel temperature for PP is usually 170-220°C, while for PET it is 260-280°C. Excessively high temperatures can cause thermal degradation of the plastic, leading to a reduction in the mechanical properties of the recycled granules, while excessively low temperatures can result in incomplete melting and poor mixing.
Irẹrẹ Oṣuwọn: The shear rate is determined by the screw speed and the screw design. A suitable shear rate helps to homogenize the molten plastic, disperse any remaining contaminants, ati ki o mu awọn plasticity ti awọn granules. Sibẹsibẹ, Awọn oṣuwọn rirẹ-irẹrun ti o ga julọ le fa ibajẹ ẹrọ ti ọna molikula ṣiṣu, yori si dinku iṣẹ.
Iyara dabaru: Iyara skru yoo ni ipa lori ipalọlọ, yo ṣiṣe, ati dapọ didara. Awọn iyara skru ti o ga julọ le mu iṣelọpọ pọ si ṣugbọn o le dinku yo ati ṣiṣe dapọ, nigba ti kekere dabaru iyara le mu awọn dapọ didara sugbon din losi. Iyara dabaru ti o dara julọ da lori iru ṣiṣu, awọn extruder iru, ati didara granule ti o fẹ.
Extrusion Ipa: Awọn extrusion titẹ ti wa ni ṣiṣe nipasẹ awọn kú oniru, dabaru iyara, ati iki ohun elo. Iduroṣinṣin titẹ extrusion ṣe idaniloju idasile okun aṣọ ati iwọn granule deede. Iwọn giga ti o ga julọ le fa idena ku, nigba ti nmu kekere titẹ le ja si ni uneven strands.

2.6 Itutu ati Ige

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 (gẹgẹbi diẹ ninu awọn pilasitik ti imọ-ẹrọ).

Once the strands are cooled and solidified, they are cut into uniform granules using a pelletizer. The pelletizer is typically installed at the exit of the cooling system and can be adjusted to control the length of the granules (usually between 2mm and 5mm). Common types of pelletizers include strand pelletizers, water ring pelletizers, and underwater pelletizers. Strand pelletizers are the most widely used type for waste plastic recycling granulation, as they are simple in structure, rọrun lati ṣiṣẹ, and suitable for most types of plastics.

2.7 Screening and Packaging

After cutting, the recycled granules are screened using a vibrating screen to remove any oversized or undersized granules, ensuring uniform particle size. The screened granules are then dried again (if necessary) to remove any moisture absorbed during cooling, 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

Bi darukọ sẹyìn, 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. Nibẹ ni o wa meji akọkọ orisi ti extruders lo ninu egbin ṣiṣu atunlo granulation: Twin-dabaru extruders ati nikan-dabaru 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, gẹgẹ bi awọn ABS, PS, ati PET. They consist of two parallel screws that rotate in the same direction (àjọ-yiyi) tabi awọn itọnisọna idakeji (counter-yiyi) 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 (ojo melo 1-5 iseju) 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 (gẹgẹ bi awọn stabilizers, antioxidants, ati awọn awọ) 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, auto awọn ẹya ara, ati awọn nkan isere. ABS jẹ ifarabalẹ si ooru ati nilo akoko ibugbe kukuru ati dapọ ti o dara, ṣiṣe ibeji-dabaru extruders awọn bojumu wun.
PS: Mejeeji kosemi ati foomu PS le ṣee tunlo nipa lilo awọn extruders ibeji-skru. Awọn agbara idapọmọra ti o ga julọ ti awọn extruders twin-skru ṣe iranlọwọ lati tuka eyikeyi awọn sẹẹli foomu ti o ku ati awọn idoti, aridaju ti o dara granule didara.
PET: PET jẹ itara pupọ si ọrinrin ati ooru, ati nilo iṣakoso iwọn otutu deede ati akoko ibugbe kukuru. Awọn extruders Twin-skru pẹlu fifun ti o dara ati awọn agbara iṣakoso iwọn otutu jẹ o dara fun granulation atunlo PET.
Engineering Plastics: Awọn pilasitik imọ-ẹrọ miiran bii PC (Polycarbonate), PA (Polyamide), ati POM (Polyoxymethylene) tun le tunlo nipa lilo ibeji-skru extruders, o ṣeun re wọn superior dapọ ati plasticizing agbara.

3.2 Nikan-dabaru Extruders fun atunlo Granulation

Nikan-dabaru extruders ni o wa rọrun ni be, kekere ni iye owo, 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.
Iye owo-doko: 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, aridaju ti o dara granule didara.
Simple Operation and Maintenance: Single-screw extruders have a simple structure, pẹlu diẹ gbigbe awọn ẹya ara, 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 (Polypropylene): 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 (Polyethylene): Both LDPE and HDPE are suitable for processing with single-screw extruders. LDPE, gegebi bi, 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 (Kekere-iwuwo Polyethylene): 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).
Iwọn iṣelọpọ: 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.
Isuna: Twin-screw extruders are more expensive than single-screw extruders, both in terms of initial investment and maintenance costs. Nitorina, enterprises with limited budgets may prefer single-screw extruders for general-purpose plastic recycling.
Lilo Agbara: 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, ṣiṣe, fifipamọ agbara, ati iye owo-doko. 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.
Iṣakoso iwọn otutu deede: 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.
Agbara-Nfi Apẹrẹ: 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, atehinwa downtime.
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. Fun apere, 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, pẹlu 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, pẹlu PP, PE, LDPE, ABS, ati 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, reducing downtime and maintenance costs.
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:

Awoṣe	Yiyi kan pato (N.m/Cm³)	Agbara motor akọkọ (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, pẹlu PP, PE, LDPE, ABS, ati 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, jiṣẹ ga ti o ga nigba ti atehinwa agbara agbara. 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, ti o ga losi, 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. Ni akoko kan naa, 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, dabaru iyara, extrusion titẹ, 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:

Awoṣe	Yiyi kan pato (N.m/Cm³)	Agbara motor akọkọ (Kw)	Output speed（rpm）	Slot depth ratio D0/Di	Suitable Plastics	Gbigbe (kg/h)
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, pẹlu iṣelọpọ ti o ga julọ ati ṣiṣe agbara to dara julọ ni akawe si jara ZTE. Wọn dara fun iṣelọpọ alabọde si iwọn nla ti awọn granules ti a tunṣe fun awọn fiimu ṣiṣu, paipu, ati awọn ọja ti o ni abẹrẹ.

4.3.3 Awọn oju iṣẹlẹ ohun elo fun HTE Series

jara HTE jẹ apẹrẹ fun awọn oju iṣẹlẹ ohun elo atẹle:

Alabọde si awọn ile-iṣẹ atunlo iwọn nla pẹlu awọn ibeere didara granule ti o ga julọ.
Atunlo ti ọpọ orisi ti egbin pilasitik, pẹlu PP, PE, LDPE, ABS, PS, ati PET.
Ṣiṣejade ti awọn granules atunlo didara giga fun awọn ẹya ọkọ ayọkẹlẹ, itanna ọja ẹya ẹrọ, ati awọn ọja abẹrẹ ti o ga-giga.
Awọn ile-iṣẹ ti o ni idojukọ lori ṣiṣe agbara ati idinku idiyele, o ṣeun si apẹrẹ fifipamọ agbara ti jara HTE.

4.4 Awọn solusan adani lati Zhuoyue

Ni afikun si boṣewa ZTE ati HTE jara, Zhuoyue tun pese awọn solusan extruder ti adani fun awọn iwulo atunlo ṣiṣu egbin pataki. Fun apere:

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, agbẹgbẹ, extruders, pelletizers, 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 (bi irin, iwe, and glass) as much as possible. Thoroughly clean the waste plastics to remove oil, girisi, ati awọn iṣẹku ounje, 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, dabaru iyara, ati extrusion titẹ) according to the type of waste plastic. Tẹle awọn eto paramita ti a ṣeduro ti a pese nipasẹ Zhuoyue, ati ṣe awọn atunṣe ti o da lori awọn ohun-ini ohun elo gangan ati didara granule. Yago fun awọn iwọn otutu ti o ga ju tabi awọn oṣuwọn rirẹrun, eyiti o le fa ibajẹ ṣiṣu.

5.4 Itọju deede

Ṣayẹwo nigbagbogbo ati ṣetọju extruder lati rii daju iṣẹ deede rẹ. Mọ awọn skru ati awọn agba nigbagbogbo lati yọ eyikeyi ohun elo ti a kojọpọ tabi awọn idoti kuro. Ṣayẹwo yiya ti awọn skru ati awọn agba, ki o si ropo wọn nigbati pataki. Lubricate awọn ẹya gbigbe nigbagbogbo lati dinku ija ati fa igbesi aye iṣẹ ti extruder.

5.5 Lilo awọn afikun (Ti o ba wulo)

Fun awọn pilasitik egbin pẹlu ibajẹ nla tabi iṣẹ ti ko dara, ro fifi awọn afikun bii awọn amuduro, antioxidants, ati awọn ṣiṣu ṣiṣu lati mu didara awọn granules ti a tunlo. Consult Zhuoyue’s technical team to select the appropriate additives and dosage.

6. Ipari

Waste plastic recycling granulation is a critical technology for realizing resource circulation and environmental protection, offering significant economic, ayika, 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, ṣiṣe, fifipamọ agbara, ati iye owo-doko. 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, kongẹ otutu iṣakoso, 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, gbẹkẹle, 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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