Tsarin busa kwalban PET

An canza kwalabe na abin sha a haɗe da kwalabe na polyethylene naphthalate (PEN) ko kwalabe na PET da thermoplastic polyarylate.An rarraba su azaman kwalabe masu zafi kuma suna iya tsayayya da zafi sama da 85 ° C;kwalabe na ruwa sune kwalabe masu sanyi, babu buƙatun don juriya na zafi.Kwalban mai zafi yana kama da kwalban sanyi a cikin tsari.

1. Kayan aiki

A halin yanzu, masana'antun na PET masu cikakken aiki suna shigo da injunan gyare-gyare na musamman daga SIDEL na Faransa, KRONES na Jamus, da Fujian Quanguan na China.Kodayake masana'antun sun bambanta, ka'idodin kayan aikin su sun kasance iri ɗaya, kuma gabaɗaya sun haɗa da manyan sassa biyar: tsarin samar da billet, tsarin dumama, tsarin busa kwalban, tsarin sarrafawa da injunan taimako.

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2. Busa gyare-gyaren tsari

PET kwalban bugun gyare-gyaren tsari.

Mahimman abubuwan da suka shafi tsarin gyare-gyaren kwalban PET sune preform, dumama, busawa, mold da yanayin samarwa.

 

2.1 Gabatarwa

Lokacin shirya kwalabe-bushe, guntuwar PET ana fara yin allura zuwa preforms.Yana buƙatar adadin kayan da aka dawo dasu ba zai iya zama babba ba (kasa da 5%), adadin lokutan dawowa ba zai iya wuce sau biyu ba, kuma nauyin kwayoyin halitta da danko ba zai iya zama ƙasa da ƙasa ba (nauyin kwayoyin 31000-50000, danko na ciki 0.78). -0.85cm 3/g.Dangane da Dokar Kare Abinci ta Ƙasa, ba za a yi amfani da kayan dawo da na biyu ba don kayan abinci da na magunguna.Za'a iya amfani da preform ɗin da aka ƙera allura har zuwa awanni 24.Abubuwan da ba a yi amfani da su ba bayan dumama dole ne a adana su fiye da sa'o'i 48 don sake yin zafi.Lokacin ajiya na preforms ba zai iya wuce watanni shida ba.

Ingancin preform ya dogara da yawa akan ingancin kayan PET.Ya kamata a zaɓi kayan da ke da sauƙin kumburi da sauƙin siffa, kuma ya kamata a yi aiki da tsarin gyare-gyaren da ya dace.Gwaje-gwaje sun nuna cewa samfuran da aka shigo da su na kayan PET tare da danko iri ɗaya sun fi sauƙi don busa ƙura fiye da kayan gida;yayin da tsari iri ɗaya na preforms suna da kwanakin samarwa daban-daban, tsarin gyare-gyaren bugun yana iya bambanta sosai.Ingancin preform yana ƙayyade wahalar aikin gyare-gyaren busa.Abubuwan da ake buƙata don preform sune tsabta, nuna gaskiya, babu ƙazanta, babu launi, da tsayin wurin allurar da kewayen halo.

 

2.2 Dumama

Ana yin dumama na preform ta hanyar dumama tanda, wanda aka saita zafin jiki da hannu kuma an daidaita shi sosai.A cikin tanda, bututun fitilar infrared mai nisa yana sanar da cewa infrared mai nisa yana haskakawa preform, kuma fan a kasan tanda yana zagayawa da zafi don sanya yanayin zafi a cikin tanda ko da.Preforms suna jujjuya tare a cikin motsi na gaba a cikin tanda, don haka ganuwar preforms suna mai zafi iri ɗaya.

Sanya fitilun a cikin tanda gabaɗaya a cikin siffar "yanki" daga sama zuwa ƙasa, tare da ƙarin iyakar da ƙasa da tsakiya.Ana sarrafa zafin wutar tanda ta yawan buɗewar fitila, yanayin yanayin zafi gaba ɗaya, wutar tanda da dumama rabo na kowane sashe.Buɗe bututun fitila ya kamata a daidaita shi tare da kwalban da aka riga aka busa.

Don yin aikin tanda mafi kyau, daidaitawar tsayinsa, farantin sanyi, da dai sauransu yana da mahimmanci.Idan gyare-gyaren ba daidai ba ne, yana da sauƙi don busa bakin kwalban (bakin kwalban ya zama ya fi girma) da wuyan kai da wuyansa (abun wuyansa ba za a iya buɗewa ba) yayin gyaran busawa da sauran lahani.

 

2.3 Pre-busa

Kafin busawa mataki ne mai matuƙar mahimmanci a cikin hanyar busa kwalban mataki biyu.Yana nufin busawa da ke farawa lokacin da sandar zana zana ta sauko yayin aikin gyare-gyaren bugun, ta yadda preform ɗin ya yi kama.A cikin wannan tsari, da pre-busa fuskantarwa, pre-busa matsa lamba da busa kwarara abubuwa ne uku da muhimmanci tsari abubuwa.

Siffar nau'in kwalban da aka riga aka busa yana ƙayyade wahalar aikin gyaran busa da ingancin aikin kwalban.Siffar kwalaben da aka riga aka busa ta al'ada tana da siffar sandal, kuma waɗanda ba su da kyau sun haɗa da sifar ƙararrawa da siffar riƙo.Dalilin yanayin da ba a saba da shi ba shine dumama gida mara kyau, rashin isasshen matsi na busawa ko busawa, da dai sauransu. Girman kwalban da aka rigaya ya dogara da matsananciyar busawa da kuma daidaitawar busawa.A cikin samarwa, girman da siffar duk kwalabe da aka rigaya a cikin dukan kayan aiki dole ne a kiyaye su tare.Idan akwai bambanci, ya kamata a sami cikakkun dalilai.Za'a iya daidaita tsarin dumama ko busawa bisa ga yanayin kwalban da aka rigaya.

Girman matsa lamba kafin busawa ya bambanta da girman kwalban da ƙarfin kayan aiki.Gabaɗaya, ƙarfin yana da girma kuma ƙarfin busawa yana ƙarami.Kayan aiki yana da babban ƙarfin samarwa da kuma matsananciyar busawa.

 

2.4 Na'ura mai taimako da mold

Na'ura mai ba da taimako galibi tana nufin kayan aiki waɗanda ke kiyaye yawan zafin jiki.Matsakaicin zafin jiki na mold yana taka muhimmiyar rawa wajen kiyaye zaman lafiyar samfurin.Gabaɗaya, zafin jikin kwalbar yana da girma, kuma zafin ƙasan kwalban yana da ƙasa.Don kwalabe masu sanyi, saboda tasirin sanyaya a ƙasa yana ƙayyade matakin daidaitawar kwayoyin halitta, yana da kyau a sarrafa zafin jiki a 5-8 ° C;kuma yanayin zafi a kasan kwalabe mai zafi ya fi girma.

 

2.5 Muhalli

Har ila yau, ingancin yanayin samarwa yana da tasiri mafi girma akan daidaitawar tsari.Matsakaicin yanayin zafin jiki na iya kula da kwanciyar hankali na tsari da kwanciyar hankali na samfurin.Gyaran busa kwalban PET gabaɗaya ya fi kyau a yanayin zafin ɗaki da ƙarancin zafi.

 

3. Sauran bukatu

Gilashin matsa lamba ya kamata ya gamsar da buƙatun gwajin damuwa da gwajin matsa lamba tare.Gwajin damuwa shine don hana fashewa da zubar da sarkar kwayoyin yayin hulɗar tsakanin kasan kwalban da mai mai (alkaline) yayin cika kwalban PET.Gwajin matsa lamba shine don kauce wa cika kwalban.Gudanar da inganci bayan fashe cikin wasu iskar gas.Don gamsar da waɗannan buƙatu guda biyu, yakamata a sarrafa kauri na tsakiya a cikin takamaiman kewayon.Yanayin gabaɗaya shi ne cewa wurin tsakiya yana da bakin ciki, gwajin damuwa yana da kyau, kuma juriya mara kyau ba ta da kyau;tsakiyar wurin yana da kauri, gwajin matsa lamba yana da kyau, kuma gwajin damuwa ba shi da kyau.Tabbas, sakamakon gwajin danniya kuma yana da alaƙa da haɗin gwiwa tare da tarin kayan aiki a cikin yanki na canji a kusa da tsakiyar tsakiya, wanda ya kamata a daidaita shi bisa ga kwarewa mai amfani.

 

4. Kammalawa

Daidaita tsarin busa kwalban PET yana dogara ne akan bayanan da suka dace.Idan bayanan ba su da kyau, buƙatun tsari suna da ƙarfi sosai, kuma yana da wahala a busa kwalabe masu dacewa.


Lokacin aikawa: Mayu-09-2020