A NEW METHOD TO REDUCE WEIGHT DENSITY BY CONSIDERING THE MOLD DESIGN IN INJECTION MOLDING PROCESS OF THERMOPLASTIC STRUCTURAL FOAM

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AHMADZAI AHMADZIA; BEHRAVESH AMIR HUSSEIN

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Journal: Modares Mechanical Engineering Year:2015 | Volume:14 | Issue:1 Page(s): 203-209

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Title

A NEW METHOD TO REDUCE WEIGHT DENSITY BY CONSIDERING THE MOLD DESIGN IN INJECTION MOLDING PROCESS OF THERMOPLASTIC STRUCTURAL FOAM

Author(s)

AHMADZAI AHMADZIA | BEHRAVESH AMIR HUSSEIN | Issue Writer Certificate

Keywords

FOAM INJECTION MOLDING (FIM)Q2

RELATIVE DENSITYQ2

FOAM EXPANSIONQ2

MOLD DESIGNQ2

Abstract

This paper presents an experimental study on the MOLD DESIGN and the effect of processing parameters on the expansion of foam injection molded parts. Limitation in FOAM EXPANSION is a primary challenge in foam injection molding process. In this study a novel approach in MOLD DESIGN is introduced to take advantages of concepts such as counter-pressure and mold opening to further extend the expansion range. Polystyrene and Nitrogen (N2) as an amorphous thermoplastic and the physical blowing agent (PBA), was used in the experiments respectively. A modular sheet mold with a rectangular cavity and a fan gate was designed and manufactured. The mold includes a main cavity, the thickness of which could be varied, connected to an overflow channel via a secondary gate, the size of which was also varied in this research. The investigated parameters were part thickness, secondary gate width. Full factorial test experiments were carried out in this research work. The results indicated the high effectiveness of the proposed approach in further reducing the foamed part weight. For the parts with a larger thickness, a noticeable decrease in bulk density and an increase in cell population density along with an improvement in cellular structure uniformity were observed.

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APA: Copy

AHMADZAI, AHMADZIA, & BEHRAVESH, AMIR HUSSEIN. (2015). A NEW METHOD TO REDUCE WEIGHT DENSITY BY CONSIDERING THE MOLD DESIGN IN INJECTION MOLDING PROCESS OF THERMOPLASTIC STRUCTURAL FOAM. MODARES MECHANICAL ENGINEERING, 14(1), 203-209. SID. https://sid.ir/paper/179827/en

Vancouver: Copy

AHMADZAI AHMADZIA, BEHRAVESH AMIR HUSSEIN. A NEW METHOD TO REDUCE WEIGHT DENSITY BY CONSIDERING THE MOLD DESIGN IN INJECTION MOLDING PROCESS OF THERMOPLASTIC STRUCTURAL FOAM. MODARES MECHANICAL ENGINEERING[Internet]. 2015;14(1):203-209. Available from: https://sid.ir/paper/179827/en

IEEE: Copy

AHMADZIA AHMADZAI, and AMIR HUSSEIN BEHRAVESH, “A NEW METHOD TO REDUCE WEIGHT DENSITY BY CONSIDERING THE MOLD DESIGN IN INJECTION MOLDING PROCESS OF THERMOPLASTIC STRUCTURAL FOAM,” MODARES MECHANICAL ENGINEERING, vol. 14, no. 1, pp. 203–209, 2015, [Online]. Available: https://sid.ir/paper/179827/en

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