{"id":551,"date":"2026-04-21T06:07:40","date_gmt":"2026-04-21T06:07:40","guid":{"rendered":"https:\/\/isbm-blow-molding.com\/?p=551"},"modified":"2026-04-21T06:10:36","modified_gmt":"2026-04-21T06:10:36","slug":"thin-corners-uneven-wall-thickness-in-pet-bottles-diagnostic-guide","status":"publish","type":"post","link":"https:\/\/isbm-blow-molding.com\/tr\/thin-corners-uneven-wall-thickness-in-pet-bottles-diagnostic-guide\/","title":{"rendered":"PET \u015ei\u015felerde \u0130nce K\u00f6\u015feler ve D\u00fczensiz Duvar Kal\u0131nl\u0131\u011f\u0131: Tan\u0131 K\u0131lavuzu"},"content":{"rendered":"

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SORUN G\u0130DERME<\/p>\n

\u0130nce K\u00f6\u015feler ve D\u00fczensiz Duvar Kal\u0131nl\u0131\u011f\u0131: Kapsaml\u0131 Tan\u0131 K\u0131lavuzu<\/h1>\n

D\u00fczensiz duvar kal\u0131nl\u0131\u011f\u0131, Koreli \u015fi\u015fe \u00fcreticilerine g\u00fcnl\u00fck 5-121.300 ton \u00fcretim kayb\u0131na neden olan en yayg\u0131n ISBM (\u0130\u00e7 Mekan \u015ei\u015fe \u00dcretiminde Hata) kusurudur. \u0130nce k\u00f6\u015feler, karbonasyon bas\u0131nc\u0131 alt\u0131nda \u015fi\u015felerin patlamas\u0131na neden olur. \u0130nce omuzlar d\u00fc\u015fme testlerinde ba\u015far\u0131s\u0131z olur. \u0130nce tabanlar kapaklardan s\u0131z\u0131nt\u0131 yapar. Bu k\u0131lavuz, be\u015f farkl\u0131 ince b\u00f6lge modelini, bunlar\u0131n spesifik mekanik k\u00f6k nedenlerini ve Koreli \u00fcretim m\u00fchendislerinin bunlar\u0131 \u00e7\u00f6zmek i\u00e7in kulland\u0131\u011f\u0131 \u00f6l\u00e7\u00fcm protokollerini tan\u0131mlar.<\/p>\n

Duvar Kal\u0131nl\u0131\u011f\u0131 Tan\u0131 Analizi Talebi \u2192<\/a><\/p>\n<\/div>\n<\/section>\n

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Bu K\u0131lavuzda<\/h3>\n
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  1. Duvar Kal\u0131nl\u0131\u011f\u0131 Da\u011f\u0131l\u0131m\u0131n\u0131 Anlamak<\/a><\/li>\n
  2. En S\u0131k G\u00f6r\u00fclen 5 \u0130nce B\u00f6lge Deseni<\/a><\/li>\n
  3. \u00d6n \u015eekil Geometrisi Temel Nedenleri<\/a><\/li>\n
  4. IR Is\u0131tma Profili Dengesizli\u011fi<\/a><\/li>\n
  5. Germe \u00c7ubu\u011fu Zamanlamas\u0131 ve Geometrisi<\/a><\/li>\n
  6. \u00d6n \u00dcfleme Bas\u0131nc\u0131 ve Zamanlamas\u0131<\/a><\/li>\n
  7. Kal\u0131p K\u00f6\u015fe Yar\u0131\u00e7ap\u0131 ve Hava Ak\u0131\u015f\u0131<\/a><\/li>\n
  8. Duvar Kal\u0131nl\u0131\u011f\u0131 \u00d6l\u00e7\u00fcm Protokol\u00fc<\/a><\/li>\n
  9. Kore Fabrikas\u0131 Vaka \u00c7al\u0131\u015fmalar\u0131<\/a><\/li>\n
  10. Sonu\u00e7 ve Tan\u0131 \u00d6zeti<\/a><\/li>\n<\/ol>\n<\/div>\n

    <\/p>\n

    1. Duvar Kal\u0131nl\u0131\u011f\u0131 Da\u011f\u0131l\u0131m\u0131n\u0131 Anlamak<\/h2>\n

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    \"PET<\/p>\n

    Hedef duvar kal\u0131nl\u0131\u011f\u0131 b\u00f6lgeleri \u2014 taban 0,35-0,50 mm, g\u00f6vde 0,25-0,35 mm, omuz 0,30-0,40 mm, boyun ge\u00e7i\u015fi 0,45-0,60 mm<\/p>\n<\/div>\n

    M\u00fckemmel dengelenmi\u015f bir ISBM \u015fi\u015fesi, malzemeyi yerel y\u00fczey gerilimi gereksinimleriyle orant\u0131l\u0131 olarak da\u011f\u0131t\u0131r. Taban, bas\u0131n\u00e7 ve d\u00fc\u015fme testi y\u00fcklerini ta\u015f\u0131r, bu nedenle tipik olarak 0,35-0,50 mm aral\u0131\u011f\u0131ndad\u0131r. G\u00f6vde, radyal bas\u0131nc\u0131 ta\u015f\u0131r ve 0,25-0,35 mm aral\u0131\u011f\u0131ndad\u0131r. Omuz, e\u011filme gerilimini kar\u015f\u0131lar ve etiket y\u00fczeyini ta\u015f\u0131r ve 0,30-0,40 mm aral\u0131\u011f\u0131ndad\u0131r. Boyun ge\u00e7i\u015fi ve sert boyun biti\u015fi, boyutsal kararl\u0131l\u0131k i\u00e7in 0,45-0,60 mm gerektirir. Bu b\u00f6lgelerden herhangi biri hedef de\u011ferin 20%'den fazla alt\u0131na d\u00fc\u015ft\u00fc\u011f\u00fcnde, dolum, nakliye veya t\u00fcketici kullan\u0131m\u0131 s\u0131ras\u0131nda mekanik ar\u0131za olas\u0131l\u0131\u011f\u0131 artar.<\/p>\n

    Ansan ve Busan'daki Kore i\u00e7ecek \u015fi\u015feleme \u015firketleri, her b\u00f6lge i\u00e7in hedef kal\u0131nl\u0131\u011f\u0131n etraf\u0131nda genellikle \u00b10,05 mm tolerans belirtir. Suwon'daki K-beauty kozmetik \u015fi\u015fe \u00fcreticileri, marka etiketlemesinde g\u00f6rsel homojenli\u011fi korumak i\u00e7in bunu \u00b10,03 mm'ye kadar s\u0131k\u0131la\u015ft\u0131r\u0131r. Daejeon ve Osong Bio Valley'deki ila\u00e7 \u015fi\u015fesi uzmanlar\u0131, KFDA d\u00fc\u015fme testi ve bas\u0131n\u00e7 testi protokollerini ge\u00e7mek i\u00e7in \u00b10,02 mm tolerans uygular. Her \u00fc\u00e7 sekt\u00f6rde de, d\u00fczensiz duvar kal\u0131nl\u0131\u011f\u0131, en s\u0131k g\u00f6r\u00fclen \u00fcretim hatas\u0131 tetikleyicisidir ve sistematik te\u015fhis metodolojisinden en \u00e7ok fayda sa\u011flayan hata t\u00fcr\u00fcd\u00fcr.<\/p>\n

    \u00dcfleme d\u00f6ng\u00fcs\u00fc s\u0131ras\u0131nda malzemenin nas\u0131l akt\u0131\u011f\u0131n\u0131 anlamak, her duvar kal\u0131nl\u0131\u011f\u0131 te\u015fhisinin temelidir. \u00d6n \u00fcfleme s\u0131ras\u0131nda, d\u00fc\u015f\u00fck bas\u0131n\u00e7l\u0131 hava, \u00f6n kal\u0131b\u0131 kal\u0131p duvar\u0131na do\u011fru yakla\u015f\u0131k 30-40 % geni\u015fletir. Germe s\u0131ras\u0131nda, \u00e7ubuk eksenel olarak uzarken malzeme tabana do\u011fru akar. Ana \u00fcfleme s\u0131ras\u0131nda, y\u00fcksek bas\u0131n\u00e7l\u0131 hava, kalan yanal geni\u015flemede malzemeyi kal\u0131p duvar\u0131na do\u011fru iter. Bu dizideki herhangi bir dengesizlik, bir sonraki b\u00f6l\u00fcmde \u00f6zel olarak tan\u0131mlanan \u00f6ng\u00f6r\u00fclebilir ince b\u00f6lge desenleri \u00fcretir.<\/p>\n

    <\/p>\n

    2. En S\u0131k G\u00f6r\u00fclen 5 \u0130nce B\u00f6lge Deseni<\/h2>\n

    Her duvar kal\u0131nl\u0131\u011f\u0131 kusuru, konuma \u00f6zg\u00fc be\u015f kal\u0131ptan birinde yo\u011funla\u015f\u0131r. Do\u011fru kal\u0131p tan\u0131mlamas\u0131, te\u015fhis dizisini olas\u0131 temel neden kategorisine y\u00f6nlendirerek sorun giderme s\u00fcresini \u00f6nemli \u00f6l\u00e7\u00fcde k\u0131salt\u0131r. A\u015fa\u011f\u0131daki kal\u0131p kartlar\u0131, her bir karakteristik kusuru, ar\u0131za etkisini ve en muhtemel sorumlu proses alan\u0131n\u0131 a\u00e7\u0131klamaktad\u0131r.<\/p>\n

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    DESEN 1<\/span><\/p>\n

    Kare\/Dikd\u00f6rtgen \u015ei\u015felerin \u0130nce K\u00f6\u015feleri<\/h3>\n<\/div>\n

    Belirti:<\/strong> \u015ei\u015fe k\u00f6\u015feleri, biti\u015fik d\u00fcz duvar kal\u0131nl\u0131\u011f\u0131n\u0131n 30-50% alt\u0131nda \u00f6l\u00e7\u00fcl\u00fcr. 1 litrelik kare su \u015fi\u015felerinde, k\u00f6\u015fe duvar\u0131 0,12 mm, d\u00fcz duvar ise 0,28 mm tipik bir dayan\u0131kl\u0131l\u0131k modelidir. D\u00fc\u015fme testleri k\u00f6\u015fe darbesinde ba\u015far\u0131s\u0131z olur; gazl\u0131 \u00fcr\u00fcn raf bas\u0131nc\u0131 alt\u0131nda k\u00f6\u015feden patlar.<\/p>\n

    As\u0131l temel neden:<\/strong> Kal\u0131p k\u00f6\u015fe yar\u0131\u00e7ap\u0131, \u00fcfleme havas\u0131 ak\u0131\u015f kapasitesine g\u00f6re \u00e7ok keskin oldu\u011fundan, malzemenin k\u00f6\u015fe geometrisine kar\u015f\u0131 akamad\u0131\u011f\u0131 \"g\u00f6lge b\u00f6lgeler\" olu\u015fur. \u0130kincil nedenler: yetersiz \u00f6n \u00fcfleme bas\u0131nc\u0131, \u00e7ok agresif k\u00f6\u015fe so\u011futmas\u0131, k\u00f6\u015fe doldurma i\u00e7in yetersiz \u00f6n \u015fekillendirme hacmi.<\/p>\n<\/div>\n

    <\/p>\n

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    DESEN 2<\/span><\/p>\n

    \u0130nce Omuz \/ Boyun-V\u00fccut Ge\u00e7i\u015fi<\/h3>\n<\/div>\n

    Belirti:<\/strong> \u015ei\u015fenin omuz duvar\u0131 0,18-0,22 mm'ye d\u00fc\u015ferken g\u00f6vde 0,28-0,32 mm'yi korur. \u015ei\u015fe halka ezilme testinde ba\u015far\u0131s\u0131z olur, kapak bas\u0131nc\u0131 alt\u0131nda \u015fi\u015fer veya etiketleme s\u0131ras\u0131nda omuz k\u0131sm\u0131nda g\u00f6zle g\u00f6r\u00fcl\u00fcr bir bozulma meydana gelir. \u00d6zellikle uzun boyunlu kozmetik \u015fi\u015felerinde yayg\u0131nd\u0131r.<\/p>\n

    As\u0131l temel neden:<\/strong> \u00d6n kal\u0131b\u0131n \u00fcst g\u00f6vdesi IR b\u00f6lgesinde a\u015f\u0131r\u0131 \u0131s\u0131narak \u00fcfleme s\u0131ras\u0131nda malzemenin g\u00f6vdeye do\u011fru akmas\u0131na neden olur. \u0130kincil nedenler: \u00f6n kal\u0131p boyun destek halkas\u0131n\u0131n geometrisinin \u015fi\u015fe omuzuyla uyumsuz olmas\u0131, germe \u00e7ubu\u011funun yetersiz eksenel uzamas\u0131, \u00f6n \u00fcflemenin \u00e7ok erken yap\u0131lmas\u0131.<\/p>\n<\/div>\n

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    DESEN 3<\/span><\/p>\n

    Kap\u0131 dire\u011fine yak\u0131n ince taban<\/h3>\n<\/div>\n

    Belirti:<\/strong> \u015ei\u015fenin taban duvar kal\u0131nl\u0131\u011f\u0131 0,20-0,30 mm iken, belirtilen kal\u0131nl\u0131k 0,40-0,50 mm'dir. \u015ei\u015fe, taban darbesi nedeniyle d\u00fc\u015fme testlerinde ba\u015far\u0131s\u0131z olmaktad\u0131r; CSD \u00fcr\u00fcn\u00fc past\u00f6rizasyon s\u0131ras\u0131nda alt k\u0131sm\u0131ndan patlamaktad\u0131r. Baz\u0131 \u015fi\u015felerde s\u0131cak dolum uygulamalar\u0131 s\u0131ras\u0131nda taban kubbesinin \u00e7\u00f6kmesi g\u00f6r\u00fclmektedir.<\/p>\n

    As\u0131l temel neden:<\/strong> Germe \u00e7ubu\u011fu, \u00f6n \u015fekillendirme taban dire\u011finin \u00e7ok fazla \u00f6tesine uzanarak, kap\u0131 kal\u0131nt\u0131s\u0131nda malzemenin incelmesine neden olur. \u0130kincil nedenler: \u00f6n \u015fekillendirme kap\u0131 \u00e7ap\u0131n\u0131n \u00e7ok k\u00fc\u00e7\u00fck olmas\u0131, germe \u00e7ubu\u011fu h\u0131z profilinin yanl\u0131\u015f olmas\u0131, \u00e7ubu\u011fun taban derinli\u011fine ula\u015fmadan \u00f6nce \u00f6n \u00fcfleme zamanlamas\u0131n\u0131n yanl\u0131\u015f olmas\u0131.<\/p>\n<\/div>\n

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    DESEN 4<\/span><\/p>\n

    Dikey \u0130nce \u00c7izgiler \/ Asimetrik Da\u011f\u0131l\u0131m<\/h3>\n<\/div>\n

    Belirti:<\/strong> \u015ei\u015fenin \u00e7evresel bir kesiminin kal\u0131nl\u0131\u011f\u0131 s\u00fcrekli olarak 0,20-0,25 mm iken, kar\u015f\u0131 kesimin kal\u0131nl\u0131\u011f\u0131 0,30-0,35 mm'dir. Kusur, g\u00fc\u00e7l\u00fc \u0131\u015f\u0131k alt\u0131nda bak\u0131ld\u0131\u011f\u0131nda dikey \u00e7izgiler \u015feklinde g\u00f6r\u00fcn\u00fcr. D\u00fc\u015f\u00fcrme testleri ince kesimde ba\u015far\u0131s\u0131z olur.<\/p>\n

    As\u0131l temel neden:<\/strong> Asimetrik k\u0131z\u0131l\u00f6tesi \u0131s\u0131tma \u2014 \u00f6n \u015fekillendirilmi\u015f par\u00e7an\u0131n bir taraf\u0131n\u0131n, \u0131s\u0131tma f\u0131r\u0131n\u0131ndan ge\u00e7i\u015fi s\u0131ras\u0131nda di\u011fer tarafa g\u00f6re s\u00fcrekli olarak daha s\u0131cak olmas\u0131. \u0130kincil nedenler: \u00fcfleme istasyonuna giren b\u00fck\u00fclm\u00fc\u015f \u00f6n \u015fekillendirilmi\u015f par\u00e7a, k\u0131z\u0131l\u00f6tesi \u0131\u015f\u0131n ge\u00e7i\u015fi s\u0131ras\u0131nda \u00f6n \u015fekillendirilmi\u015f par\u00e7an\u0131n d\u00fczensiz d\u00f6nmesi, \u00f6n \u015fekillendirilmi\u015f par\u00e7ay\u0131 merkezden uzak tutan s\u0131k\u0131\u015ft\u0131rma asimetrisi.<\/p>\n<\/div>\n

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    DESEN 5<\/span><\/p>\n

    Sap ba\u011flant\u0131 noktalar\u0131nda\/girintili k\u0131s\u0131mlarda incelikler<\/h3>\n<\/div>\n

    Belirti:<\/strong> Sap ba\u011flant\u0131 noktalar\u0131na, etiket girintilerine veya dekoratif \u00f6zelliklere biti\u015fik lokalize ince b\u00f6lgeler. Bu b\u00f6lgelerde duvar kal\u0131nl\u0131\u011f\u0131 0,15-0,20 mm'ye d\u00fc\u015fer. Y\u00fck alt\u0131nda sap kopar; doldurma s\u0131ras\u0131nda girinti \u00e7atlar. \u00d6zellikle 5 litrelik su bidonlar\u0131nda ve temizlik \u00fcr\u00fcn\u00fc kaplar\u0131nda yayg\u0131nd\u0131r.<\/p>\n

    As\u0131l temel neden:<\/strong> Karma\u015f\u0131k kal\u0131p geometrisi, \u00fcfleme havas\u0131 ak\u0131\u015f\u0131n\u0131n \u00f6zellik topolojisi taraf\u0131ndan engellendi\u011fi g\u00f6lge b\u00f6lgeleri olu\u015fturur. Malzeme, kal\u0131p duvar\u0131na yap\u0131\u015fmadan \u00f6nce dar yar\u0131\u00e7apl\u0131 k\u00f6\u015felere akamaz. Bu sorun, kal\u0131p geometrisinin yeniden d\u00fczenlenmesi veya karma\u015f\u0131k \u015fekiller i\u00e7in \u00f6zel bir \u00f6n \u00fcfleme bas\u0131n\u00e7 profili ile \u00e7\u00f6z\u00fclebilir.<\/p>\n<\/div>\n<\/div>\n

    <\/p>\n

    3. \u00d6n \u015eekil Geometrisinin Temel Nedenleri<\/h2>\n

    <\/p>\n

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    \"\u00d6n<\/p>\n

    \u00d6n kal\u0131plama, nihai \u015fi\u015fe i\u00e7in malzeme b\u00fct\u00e7esini belirler; yakla\u015f\u0131k 40% ince duvar kusuru, yetersiz \u00f6n kal\u0131p boyutland\u0131rmas\u0131ndan kaynaklanmaktad\u0131r.<\/p>\n<\/div>\n

    \u00d6n kal\u0131p geometrisi, nihai \u015fi\u015fe i\u00e7in malzeme b\u00fct\u00e7esini belirler. \u00d6n kal\u0131p hacmi, \u015fi\u015fe y\u00fczey alan\u0131 i\u00e7in yetersiz oldu\u011funda (\u00f6zellikle kulplar, girintiler veya keskin k\u00f6\u015feler gibi karma\u015f\u0131k \u015fekillerde), hedef kal\u0131nl\u0131\u011fa ula\u015fmak i\u00e7in her b\u00f6lgeyi dolduracak kadar polimer bulunmaz. \u00d6n kal\u0131p yeniden tasarlanmal\u0131d\u0131r. Yeni \u015fi\u015fe tasar\u0131mlar\u0131nda tekrarlayan ince duvar kusurlar\u0131n\u0131n yakla\u015f\u0131k 401.000 tonluk k\u0131sm\u0131, nihai \u015fi\u015fe taleplerine g\u00f6re yetersiz \u00f6n kal\u0131p boyutland\u0131rmas\u0131ndan kaynaklanmaktad\u0131r.<\/p>\n

    <\/p>\n

    Preform geometri te\u015fhis kontrol listesi:<\/strong><\/p>\n