Mikro gözenekli enjeksiyon kalıplama yönteminin otomotiv uygulamaları

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Thesis Type: Postgraduate

Institution Of The Thesis: Kocaeli University, Fen Bilimleri Enstitüsü, Makina Mühendisliği Bölümü, Turkey

Approval Date: 2015

Thesis Language: Turkish

Student: HÜROL KOÇOĞLU

Supervisor: Tamer Sınmazçelik

Open Archive Collection: AVESIS Open Access Collection

Abstract:

Microcellular injection molding is a molding process which is used to obtain cellular microstructure with the help of a supercritical fluid (SCF) as a physical foaming agent for polymer-based raw materials. The commercial name of this method is called as MuCell. With the aid of supercritical fluid (SCF), MuCell method is superior in lower melt viscocity, less cycle time, clamping force reduction, weight reduction, less shrinkage and warpage, better dimensional stability compared to conventional injection molding method. In this study, it is aimed to compare these methods in mass production and to obtain design inputs of MuCell methods. In order to maintain these goals, five different raw materials; copolymer of Polypropylene-Polyethylene (PP-PE), % 20 and 40 talc filled Polypropylene, Acryionitrile-Butadiene-Styrene (ABS) and Acryionitrile-Butadiene-Styrene - Polycarbonate (ABS-PC) were injected into two different automotive parts' mold by using conventional injection molding and MuCell methods. Tensile tests and microstructural chracterizations were applied. Afterwards, the conventional injection molding and MuCell methods were compared regarding to process parameters, unit cost, mechanical and morphological properties of manufactured parts. It is concluded that, MuCell method can be used to manufacture automotive parts. Furthermore, shorter cycle times, decrease in raw material usage, decrease in clamping force are determined as the most important beneficial outcomes of MuCell method, thus resulting cost reduction for plastic automotive parts.