Journals / Gazi Üniversitesi Mühendislik Mimarlık Fakültesi Dergisi / 2015 / Cilt: 30 - Sayı: 3

EFFECTS OF INJECTION MOLDING CONDITIONS ON RESIDUAL STRESS IN HDPE AND PP PARTS

YYPE VE PP PARÇALARDAKİ KALINTI GERİLMELERE ENJEKSİYON KALIPLAMA ŞARTLARININ ETKİLERİ

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Publication Date
2015-09-29
DOI
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AI Summary & Key Takeaways

AI Insight
⚡ TL;DR(Too Long; Didn't Read)

Results show that the influential factors are cooling time, melt temperature and packing pressure on HDPE parts, and cooling time, melt temperature and mold temperature on PP parts.

📌 3 Key Takeaways

🎯
Objective & Hypothesis:This research examines effects of molding conditions on residual stress and tensile strength of injection molded plastic parts.
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Key Findings & Data:Six factors (injection pressure, melt temperature, mold temperature, packing pressure, packing time and cooling time) and three levels of each factor were examined.
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Conclusion & Impact:Results show that the influential factors are cooling time, melt temperature and packing pressure on HDPE parts, and cooling time, melt temperature and mold temperature on PP parts.
🔬Design:Research Article
📍Scope:Comprehensive Sample
⚙️Variables:Enjeksiyon kalıplama · kalıntı gerilme · çekme dayanımı

Abstract

This research examines effects of molding conditions on residual stress and tensile strength of injection molded plastic parts. Six factors (injection pressure, melt temperature, mold temperature, packing pressure, packing time and cooling time) and three levels of each factor were examined. Taguchi experimental setup was used to reduce the number of experiments. The rectangular shaped flat parts were molded using high density polyethylene (HDPE) and polypropylene (PP) samples. The layer removal technique was used to prediction of the residual stresses. Results show that the influential factors are cooling time, melt temperature and packing pressure on HDPE parts, and cooling time, melt temperature and mold temperature on PP parts.

Özet

Bu çalışmada enjeksiyon kalıplama şartlarının kalıplanmış plastik parçalardaki kalıntı gerilmelere ve çekme dayanımlarına etkileri araştırılmıştır. Altı kalıplama şartı (enjeksiyon basıncı, enjeksiyon sıcaklığı, kalıp sıcaklığı, ütüleme basıncı, ütüleme süresi ve soğutma süresi) ve her bir faktörün üç seviyesi çalışılmıştır. Deney sayısının azaltılması için Taguchi Deney Tasarımı kullanılmıştır. Dikdörtgen şekilli deney parçaları yüksek yoğunluklu polietilen (YYPE) ve polipropilen (PP) malzemelerden kalıplanmıştır. Kalıntı gerilmelerin ölçümü için katman kaldırma yöntemi kullanılmıştır. Kalıntı gerilme olarak YYPE’de 3,5 MPa, PP’de 0,6 MPa çekme kalıntı gerilmesi; YYPE’de -0,6 MPa, PP’de – 0,16 MPa basma kalıntı gerilmesi elde edilmiştir. Kalıntı gerilmeye YYPE parçalarda etkinlik sırasıyla, soğutma süresi, enjeksiyon sıcaklığı ve ütüleme basıncı etkili olurken, PP parçalarda ise, soğutma süresi, enjeksiyon sıcaklığı ve kalıp sıcaklığı etkili olmuştur.

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Cite This Article

KATMER, Ş., KARATAŞ, Ç. (2015). EFFECTS OF INJECTION MOLDING CONDITIONS ON RESIDUAL STRESS IN HDPE AND PP PARTS. Gazi Üniversitesi Mühendislik Mimarlık Fakültesi Dergisi, Cilt: 30 - Sayı: 3, 0. https://ajindex.com/articles/20413

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