Zoyambira pa Kupanga Mabotolo a PET Blow: Buku Lokwanira Lopangira Mabotolo a PET

Dziwani zofunikira pakupanga PET blow molding! Bukuli likufotokoza za zinthu za PET, kapangidwe ka preform, njira imodzi poyerekeza ndi ziwiri, komanso kukula kwa khosi monga 410 ndi 415 popangira zodzikongoletsera.

Chiyambi: Botolo Lomwe Lili M'dzanja Lanu

Kodi munayamba mwayang'ana pansi pa shampu yanu kapena botolo la sopo? Ngati muwona chizindikiro chaching'ono cha katatu chokhala ndi nambala "1" mkati ndi zilembo za PET, ndiye kuti muli ndi chimodzi mwa zinthu zodziwika bwino komanso zogwiritsidwa ntchito kwambiri padziko lonse lapansi.

PET (Polyethylene Terephthalate) ndiye maziko a makampani amakono opaka zinthu, makamaka m'magawo osamalira anthu ndi zakumwa. PET yodziwika kuti ndi yopepuka, yoyera bwino, komanso yamphamvu kwambiri, yasintha momwe timasungira ndi kunyamula zakumwa. M'nkhaniyi, tikambirana za "momwe" ndi "chifukwa" chaKuumba kwa PET, kukuthandizani kumvetsetsa njira yochititsa chidwi iyi yopangira zinthu.

1. Kodi PET kwenikweni ndi chiyani?

Tisanalowe mu makinawa, tiyeni tiwone momwe zimagwirira ntchito. PET imayimira Polyethylene Terephthalate. Ndi mtundu wa polyester.

Chinsinsi cha Mankhwala

PET imapangidwa kudzera mu polymerization reaction pakati pa zipangizo ziwiri zazikulu zopangira:

1. PTA (Acid Terephthalic Yoyeretsedwa)
2. EG (Ethylene Glycol)

Zikaphatikizana zonsezi, zimapanga utomoni wapulasitiki womwe ndi wotetezeka pa chakudya ndi zodzoladzola. PET ndi yokondedwa chifukwa imawoneka ngati "galasi" koma siisweka mukaigwetsa. Imagwiranso ntchito ngati chotchinga chachikulu ku chinyezi ndi mpweya, zomwe zimasunga zinthu zanu kukhala zatsopano kwa nthawi yayitali.

2. Poyambira: Kumvetsetsa "Preform"

Simumangotulutsa botolo kuchokera mu mulu wa mapulasitiki. Botolo lililonse la PET limayamba ngati Preform (lomwe limatchedwanso "parison").

Kodi Preform ndi chiyani?

Ganizirani za preform ngati "chubu choyesera" chokhala ndi ulusi. Ndi chinthu chapakati chomwe chimapangidwa kudzera mu jekeseni.

• Khosi: Mbali ya pamwamba ya preform (komwe chivundikirocho chimapita) imamalizidwa panthawi yobayira. Kukula kwake ndi mawonekedwe ake sizisintha panthawi yopukutira.
• Thupi: Gawo la pansi ndi chubu cholimba. Ichi ndi gawo lomwe lidzatenthedwa ndikutambasulidwa kuti likhale botolo lomaliza.

Kapangidwe ka preform—kulemera kwake, makulidwe a khoma, ndi kutalika kwake—ndi chinthu chofunikira kwambiri podziwa ubwino wa botolo lomaliza. Ngati preform ndi yopyapyala kwambiri, botolo lidzakhala lofooka; ngati ndi lokhuthala kwambiri, mukuwononga ndalama pazinthu.

3. Njira Ziwiri Zopangira Botolo: Gawo Limodzi vs. Gawo Liwiri

Mu makampani, pali njira ziwiri zazikulu zosinthira preform kukhala botolo. Zonse ziwiri zili ndi zabwino ndi zoyipa zake.

Njira A: Njira Yoyambira Gawo Limodzi

Mu ndondomeko ya One-Step, kuumba kwa jakisoni wa preform ndi kuumba kwa botolo kumachitika mu makina omwewo.

• Momwe imagwirira ntchito: Pulasitiki imalowetsedwa mu chikombole kuti ipange preform. Pamene preform ikadali yotentha (kusunga mphamvu!), imasunthidwa kupita ku malo opukutira mpweya komwe imatambasulidwa ndikupukutira mpweya mpaka mawonekedwe omaliza.
• Ubwino: * Ubwino Wapamwamba: Popeza preform sikhudzidwa ndi manja a anthu kapena kusungidwa m'mabinki, palibe mikwingwirima yambiri.
  • Kuchita bwino: Kumasunga mphamvu chifukwa simuyenera "kutenthetsanso" preform kuchokera kutentha kwa chipinda.
  • Kusunga Malo: Makina amodzi amachita chilichonse.

Njira B: Njira Ya magawo Awiri

Njira ya magawo awiri imalekanitsa jakisoni ndi kupukutira m'makina awiri osiyana ndipo nthawi zambiri nthawi ziwiri zosiyana.

• Momwe imagwirira ntchito: Choyamba, makina opangira jakisoni amapanga masauzande ambiri a preforms. Izi zimaziziritsidwa ndikusungidwa. Pambuyo pake, preforms "zozizira" izi zimayikidwa mu makina opangira Reheat Blow Molding.
• Ubwino:
  • Kusinthasintha: Mutha kugula zinthu zoyambira kuchokera kwa ogulitsa apadera ndikuyika ndalama mu makina opukutira okha.
  • Zinthu Zofunika: Ma preform ndi ang'onoang'ono komanso osavuta kutumiza. Mutha kupanga ma preform 100,000 m'malo ochepa ndikutumiza ku fakitale kuti akaphulitsidwe m'mabotolo akuluakulu pambuyo pake.
  • Liwiro: Makina amakono okhala ndi magawo awiri amatha kupanga mabotolo pa liwiro lalikulu kwambiri (makumi zikwi pa ola limodzi).

4. Mafotokozedwe Aukadaulo: "Khosi" ndi "Ulusi"

Popanga botolo, "Khosi" ndiye gawo laukadaulo kwambiri. Muyenera kuonetsetsa kuti chivundikirocho chikukwanira bwino kuti chisatuluke. Mu dziko la PET, timagwiritsa ntchito miyeso yokhazikika ya T-dimension (m'mimba mwake wakunja kwa khosi).

Ma diameter a khosi wamba ndi awa:

• Φ18, Φ20, Φ24, Φ28, Φ33 (mm)

Chiwerengero cha Mizere (400, 410, 415)

Kodi munayamba mwaonapo kuti zipewa zina ndi “zazitali” ndipo zina ndi “zazifupi”? Izi zikutanthauza mfundo za ulusi:

• 400: Kawirikawiri amatanthauza kuzungulira konse kwa ulusi.
• 410: Kawirikawiri amatanthauza kuzungulira kwa ulusi ka 1.5.
• 415: Iyi ndi njira ya "khosi lalitali", nthawi zambiri yokhala ndi kuzungulira kawiri konse.

Kusankha ulusi woyenera ndikofunikira kwambiri pa "zogwiritsa ntchito." Khosi la 415 limawoneka labwino kwambiri komanso lotetezeka posamalira khungu lapamwamba, pomwe khosi la 400 ndi lotsika mtengo pazakumwa zosavuta.

5. PET vs. Mapulasitiki Ena: Ndi ati omwe muyenera kusankha?

Ngakhale kuti PET ndiye mfumu ya kuwonekera poyera, si njira yokhayo. Umu ndi momwe imafananira ndi abale ake:

Malangizo Abwino: Mutha kudziwa kuti botolo ndi PET ngati lili ndi "kadontho" kakang'ono kowala (chipata) pakati pa pansi. Ngati pansi pali "mzere wautali wolumikizira," mwina ndi botolo la PE kapena PP lopangidwa pogwiritsa ntchito chopangira chowonjezera.

6. Kumaliza ndi Zowonjezera

Botolo ndi chidebe chokha mpaka mutawonjezera "umunthu." Mabotolo a PET amatha kusinthidwa m'njira zingapo:

• Kupaka Utoto: Ngakhale kuti PET ndi yoyera mwachilengedwe, mutha kuwonjezera "masterbatch" kuti ikhale yachikasu, yabuluu, kapena yoyera kwambiri.
• Kupopera: Kuti zinthu ziwoneke zapamwamba, mabotolo amatha kupakidwa utoto wofiirira kapena wachitsulo.
• Zigawo Zofananira: "Phukusi" limadzazidwa ndi:
  • Mapampu: A mafuta odzola ndi ma seramu.
  • Zophimba: Zotsukira shampu ndi sopo wothira mbale.
  • Zopopera ndi nthunzi: Za ma toner ndi zonunkhira.

7. Chifukwa chiyani PET ndi Yofunikira pa Makampani Okongola

Makampani opanga zodzoladzola ndi kusamalira tsitsi amakonda PET pazifukwa zitatu zazikulu:

1. Kukongola: Kumawoneka ngati galasi koma kumakhala kotetezeka kwambiri mu shawa yoterera.
2. Kukana Mankhwala: Sichigwirizana ndi mafuta ndi zonunkhira zomwe zimapezeka mu sopo zambiri.
3. Kukhazikika: PET ndi yobwezerezedwanso 100%. Makampani ambiri amakono tsopano akuyamba kugwiritsa ntchito rPET (PET yobwezerezedwanso) kuti achepetse mpweya woipa womwe umabwera chifukwa cha carbon dioxide.

Mapeto

Kumvetsetsa kupanga ma PET blowing kumakhudza kumvetsetsa bwino momwe zinthu zilili pakati pa chemistry ndi engineering. Kuyambira poyambitsa preform mpaka mpweya womaliza womwe umapanga botolo, sitepe iliyonse imafuna kulondola. Kaya ndinu mwini bizinesi yomwe mukufuna ma cookies kapena wophunzira amene akufuna kupanga zinthu, kudziwa mfundo izi kumakuthandizani kumvetsetsa zovuta zomwe zili mkati mwa botolo losavuta la pulasitiki.