PET Mapepala Extrusion Machine Line

Mapepala a PET (polyethylene terephthalate), makamaka mapepala a APET (amorphous PET) ndi RPET (obwezeretsanso PET), amagwiritsidwa ntchito kwambiri m'magawo apamwamba a -ogwira ntchito monga ma trays a chakudya, matuza, zodzoladzola zodzoladzola, ndi zina zotero. processing kutentha, khalidwe crystallization), zipangizo ali ndi mapangidwe ake apadera ndi zofunika.

 

PET mankhwala

Mapepala a PET

pepala lowonekera la PET

PET Packing pepala

Chinthu chachikulu cha PET ndi:

1. Highly hygroscopic: Pamene zipangizo za PET zimapangidwira kutentha kwambiri, chinyezi chingapangitse kuti hydrolyze iwonongeke, zomwe zimapangitsa kuti ma molekyulu awonongeke, brittleness, whitening, ndi kuchepa kwakukulu kwa makina azinthu. Chifukwa chake, njira yowumitsa ndiye njira yopangira PET.

2. Khalidwe lodziwikiratu la crystallization: Kuzizira kofulumira kumafunika panthawi yokonzekera kupondereza crystallization ndikupanga mapepala a APET owonekera kwambiri; Kapenanso, kutenthetsa kumatha kupangitsa kuti kristalo ikhale yonyezimira ndi kutulutsa -mapepala osamva kutentha kwa CPET (monga thireyi za uvuni).

PET flake crystallizer ndi automatic loader system

1. Pali ma seti angapo a ma probes ndi malupu owongolera panjira yolowera mpweya ndi bokosi lotenthetsera kuti atsimikizire chitetezo cha kutentha, alamu ya kutentha ndi chitetezo chodzitchinjiriza (ma seti 2 a probes, ma seti 4 a mabwalo)

2. Konzani mawonekedwe olimbikitsa kuti awonetsetse kuti zinthuzo zimagwedezeka mofanana komanso bwino, ndipo zinthuzo zilibe agglomeration.

3. 360-kapangidwe kazotenthetsera kutentha kwa digirii (kuphatikiza njira yolowera mpweya) kuti zitsimikizire kugwiritsa ntchito mphamvu zotentha kwambiri

4. Ukadaulo waposachedwa wa Liao Wei wowongolera kuti utsimikizire kukhazikika kwa Liao Wei ndi chitetezo

 

Mzere wamba wa PET sheet extrusion kupanga makamaka umaphatikizapo machitidwe awa:

1. Raw material pretreatment system - mbali yofunika kwambiri

·Dehumidification ndi kuyanika makina:

Zipangizo zapakati: zokhala ndi zowumitsa zosachepera ziwiri zamagudumu a njuchi ndi zowumitsira.

·Kayendedwe kantchito: Iyi ndi njira yopitilira. Chowumitsira chimagwira ntchito mosalekeza kuti ziume zopangira za PET (nthawi zambiri zimakhala ndi granular) kutentha kwambiri (monga 150-180 ° C) kwa maola osachepera 4-6, kuchepetsa chinyezi kukhala pansi pa 50ppm (0.005%) (nthawi zambiri zimafunikira<30ppm). The other one is used as a backup or regeneration to ensure uninterrupted production.

·Uyuyumu: Zipangizo zouma zouma zimadyedwa mwachindunji mu payipi ya vacuum yotsekeredwa kuti zisalowenso chinyezi.

2. Dongosolo la Extrusion

· Extruder:

·Single screw exhaust extruder: Uku ndiye kasinthidwe wokhazikika pakupanga mapepala a PET.

· Chifukwa chiyani mtundu wa exhaust? Ngakhale kuti zopangirazo zauma, mpweya wochepa wa mpweya (nyowa, oligomers) ukhoza kupangidwabe panthawi yosungunuka. Extruder yotulutsa mpweya imakhala ndi mabowo otulutsa mpweya ndipo imalumikizidwa ndi pampu ya vacuum, yomwe imatha kutulutsa mpweyawu mwamphamvu panthawi yosungunuka, kuwonetsetsa kuti chomalizacho ndi chopanda kuwira komanso chopanda chilema.

·Kupanga screw: Zopangidwira makamaka kukhuthala, malo osungunuka, ndi mawonekedwe ena a PET, nthawi zambiri amakhala ndi L/D yayitali (aspect ratio), monga 32:1 kapena kuposa, kuonetsetsa kusungunuka kokwanira ndi homogenization.

Sungunulani fyuluta ndi pompo ya zida (zosankha koma zofunika):

· Sungunulani fyuluta: Makamaka mukamagwiritsa ntchito RPET (zobwezerezedwanso), imagwiritsidwa ntchito kusefa zonyansa ndi tinthu tating'ono ta carbide mu sungunuka.

·Pampu yamagetsi: imayikidwa pakati pa chotulukapo ndi mutu wa kufa, womwe umagwiritsidwa ntchito pokhazikitsa kutsika kokhazikika kwa kusungunuka, kuthetsa kusinthasintha kwa kayendedwe ka ma pulse otuluka, ndikuwonetsetsa{{0}kufanana kwapamwamba kwambiri kwa ma sheet. Ndi chinthu chofunikira kwambiri popanga{2}}mapepala apamwamba kwambiri.

· Mutu wa nkhungu:

·Hanger style T-zooneka ngati mafelemu: Mofanana ndi mawaya a pepala la PVC, imagawa PET yosungunuka m'malo opanda kanthu m'lifupi ndi makulidwe omwe mukufuna. Mapangidwe a tchanelo amayenera kusinthira kumayendedwe a PET. Mlomo wa nkhungu nthawi zambiri umakhala ndi chipangizo chosinthira chowongolera chotentha cha bawuti kuti pakhale kusintha kwapaintaneti kwa makulidwe ofananira nawo a pepala.

3. Kujambula ndi kuzizira dongosolo

· Kalendala yamitundu itatu:

·Core function: Kwa PET, ntchito yayikulu ya ma roller atatu ndikuzizira mwachangu. Kutentha kwapamwamba-(pafupifupi 280 digiri C) PET kusungunuka kotuluka mu nkhungu kuyenera kuziziritsidwa mofulumira pansi pa kutentha kwa glass transition (Tg) kuti ichepetse crystallization ndi kupeza ma sheet a APET oonekera kwambiri, opanda crystalline.

·Kuwongolera kutentha kwa ma roller: Zodzigudubuza zitatu nthawi zambiri zimasanjidwa molunjika kapena pakona ya digirii 45. Wodzigudubuza wapakati ndi wodzigudubuza wokhazikika, ndipo odzigudubuza apamwamba ndi apansi ndi odzigudubuza osinthika. Mkati mwa chodzigudubuza mumakhala madzi ozizira ozizira, ndipo kutentha koyenera kumafunika.

·Pamwamba Zotsatira: Kugwiritsa ntchito magalasi odzigudubuza kumatha kupeza mapepala osalala, pamene kugwiritsa ntchito zodzigudubuza zachisanu kumatha kupanga mapepala a matte.

4. Kukokera, kuyeza makulidwe ndi njira yokhotakhota

·Chigawo chokokera: chopangidwa ndi zodzizira zingapo zoziziritsa ndi zodzigudubuza za rabala, zimawongolera bwino pepala kuchokera pamakina atatu ndikuziziziritsanso.

·Kuyeza makulidwe a pa intaneti (mawonekedwe a beta kapena infrared): Pamene mukukokera, -geji yoyezera makulidwe osalumikizana imayang'ana m'lifupi lonse la pepala ndikupereka{1}}yankho la nthawi yeniyeni pa makulidwe a data. Dongosololi limatha kulumikizidwa ndi makina osinthira milomo yotentha kuti akwaniritse kuwongolera makulidwe (ATC), kuwongolera kulolerana kwa makulidwe mkati mwa ± 2-3%.

•Chida chodulira m'mphepete: Dulani m'mphepete mwa zinyalala zokhuthala mbali zonse za pepala.

· Winder: Kutengera makina okhotakhota apakati/pamtunda kapena makina okhotakhota amtundu wa turret, makina owongolera kupsinjika ndikofunikira kuti zitsimikizire kukhazikika kwa koyilo, popanda makwinya kapena kutambasuka.

5. M'mphepete zinthu yobwezeretsanso dongosolo

·Zinyalala zodulidwazo zimaphwanyidwa nthawi yomweyo kukhala zidutswa ndi makina ophwanya pa intaneti, ndiyeno mosalekeza nkusanjidwanso munjira yayikulu yowumitsa kudzera mu feeder yofananira (monga 10% -30%), yosakanizidwa ndi zida zatsopano, ndikugwiritsiridwanso ntchito, kuchepetsa kwambiri ndalama.

Mtundu wapadera: CPET kupanga mzere

Njira yopangira kutentha-mashiti a CPET osamva (omwe amagwiritsidwa ntchito ngati thireyi ya ma microwave/ovuni) amafunikira zida zowonjezera zowunikira.

·Njira: Bambo amapanga mapepala a APET oonekera ndipo nthawi yomweyo amawadutsa mu uvuni wowotcha pa intaneti. Tsambali limatenthedwa ndi kutentha kwa PET (~160-180 digiri C), ndikulisintha kuchoka ku chikhalidwe cha amorphous kupita ku kristalo ndikukhala pepala loyera la CPET. Kutentha kwake kosamva kutentha kumatha kukwezedwa kwambiri mpaka kupitilira 220 ° C.

·Mzerewu ndi wofanana ndi kuwonjezera gawo la crystallization kumapeto kwa mzere wopanga APET.

·Njira yowumitsa ndiye phata lake:-njira yabwino kwambiri yochotsera chinyezi ndi kuyanika, yomwe ndi yofunika kuti mupange mapepala oyenerera a PET.

·Zofunikira zolondola kwambiri: Zofunikira pakufanana kwa makulidwe, kuwonekera, komanso mawonekedwe apamwamba ndizokwera kwambiri, kotero mapampu amagetsi, makina ojambulira pa intaneti a ATC, ndi zina zotere nthawi zambiri zimakhala zofunikira, kukulitsa ndalama zogulira.

·Kukhudzidwa kwazinthu zopangira: Zofunikira zazikulu zimayikidwa pamtundu wa zida zopangira (makamaka ukhondo ndi kukhuthala kwa RPET) komanso kukhazikika kwa malo opanga.

Kugwiritsa ntchito mphamvu: Kuyanika ndi kutulutsa mphamvu kumafunika kutentha kwambiri, zomwe zimapangitsa kuti magetsi azigwiritsidwa ntchito kwambiri.

Mzere wa PET sheet extrusion machine ndi ukadaulo wopitilira muyeso wopitilira, ndipo maziko ake ali mu:

1. Kuyanika komaliza: Dongosolo lamphamvu la dehumidification ndi kuyanika ndiye maziko otsimikizira kuti zinthu zili bwino.

2. Precision extrusion: The extruder extruder, gear pump, ndi kulondola zimafera palimodzi zimatsimikizira chiyero, kukhazikika, ndi kufanana kwa kusungunuka.

3. Maonekedwe olondola ndi kuwongolera: Njira yoziziritsa yothamanga itatu imatsimikizira kuwonekera ndi magwiridwe antchito a pepala, pomwe kuyeza kwa makulidwe a pa intaneti ndi njira yoyankhira (ATC) imatsimikizira kuti makulidwe azinthuzo ndi ofanana.

Kusankha mzere wamakina a PET sheet extrusion ndikusankha makina odziyimira pawokha omwe amatha kuwongolera kutentha, kuthamanga, chinyezi, komanso kupsinjika.

PET ndi chinthu cha hygroscopic. Panyengo ya mlengalenga imatenga chinyezi. Pa extrusion ndondomeko chinyezi zakuthupi ndi pansi pa hydrolysis mankhwala zimene zimakhudza mawotchi zimatha extruded zojambulazo. Pachifukwa ichi umisiri wamba umafunika kuumitsa zinthuzo ndi kugwiritsa ntchito mphamvu zambiri.

Pogwiritsa ntchito COWIN m'badwo wotsiriza wa ma screw extruders, titha kuthandiza kupewa kuyanika ndikutulutsa zinthu za PET, ma pellets ndi ma flakes. Chinyezicho chimasungidwa-kupyolera mu chipangizo cha vacuum choyenera chomwe chimayikidwa pa extruder motero kupewa kapena kuchepetsa zotsatira za hydrolysis.

1. Ndi twin screw solution, mutha kuchotsa pre-drying system and crystallization system. Izi zidzapulumutsa osachepera 30% ya mphamvu.

2. Chikhalidwe chomaliza cha mapepala chiwongoleredwa chifukwa amapewa kuwonongeka kunachitika m'maola a-kusungunuka kwa makristalo ndi nthawi{2}}kusanawume.

3. Ndi COWIN yapadera super vacuum system ndi masinthidwe oyenera a screw, tikhoza kulamulira dontho la IV mkati mwamtundu wovomerezeka, kawirikawiri 0.03 imadalira chinyezi.

4. Ndi mapasa wononga, mungathe kugwiritsa ntchito mphamvu extruder. Ngakhale single wononga extruder ali ndi m'munsi kwambiri kuthamanga liwiro, mudzataya mphamvu zambiri linanena bungwe chomwecho.

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