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A study on material distribution, mechanical properties, and numerical simulation in co-injection molding

Srithep, Yottha
http://rave.ohiolink.edu/etdc/view?acc_num=osu1204150909

Abstract Details

2008, Master of Science, Ohio State University, Industrial and Systems Engineering.
In co-injection molding process, two different polymer melts are sequentially injected into a mold to form a part with a skin/core structure. Co-injection molding can be used among other applications for recycling, improving barrier and electrical properties. The basic characteristics of a co-injection molded product depend on the properties of the skin and core layers, and the skin/core volume ratio. This thesis presents a study of the effect of molding parameters on material distribution and mechanical properties of co-injection molded plates. The plates were molded with polypropylene(PP) and thermoplastic olefin(TPO) as skin and core. Four molding parameters-injection velocity, skin and core temperature, and core percent-were varied. Core percent was the most significant factor influencing core breakthrough. After the injection molding process reached steady state, molded samples were collected and cut to measure the core volume ratio using an optical microscope. Mechanical properties, such as flexural and impact strength show a good correlation with the core content. This thesis also compares the experimental results to numerical simulations using Moldflow Plastic Insight. Results for our simple mold show a good agreement between experimentals and simulations.
Jose Castro (Advisor)
Allen Yi (Committee Member)
107 p.
injection molding; co-injection molding; polymer processing; Moldflow

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Citations

  • Srithep, Y. (2008). A study on material distribution, mechanical properties, and numerical simulation in co-injection molding [Master's thesis, Ohio State University]. OhioLINK Electronic Theses and Dissertations Center. http://rave.ohiolink.edu/etdc/view?acc_num=osu1204150909

    APA Style (7th edition)

  • Srithep, Yottha. A study on material distribution, mechanical properties, and numerical simulation in co-injection molding. 2008. Ohio State University, Master's thesis. OhioLINK Electronic Theses and Dissertations Center, http://rave.ohiolink.edu/etdc/view?acc_num=osu1204150909.

    MLA Style (8th edition)

  • Srithep, Yottha. "A study on material distribution, mechanical properties, and numerical simulation in co-injection molding." Master's thesis, Ohio State University, 2008. http://rave.ohiolink.edu/etdc/view?acc_num=osu1204150909

    Chicago Manual of Style (17th edition)

osu1204150909
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© 2008, all rights reserved.
This open access ETD is published by The Ohio State University and OhioLINK.