Document Type


Date of Award


Degree Name

Master of Science in Manufacturing Engineering - (M.S.)


Manufacturing Engineering Division

First Advisor

Keith T. O'Brien

Second Advisor

Nouri Levy

Third Advisor

Rong-Yaw Chen


Design of injection molds is outmost important in the manufacture of parts. Its components runners and gates significantly influence the mold filling. Using a simulation package for injection molding a balanced multi-cavity mold was designed. Wear in the gates of runner was simulated by varying the cross-sectional area of the components. Influence of wear of tear in gates of runners on mold filling was measured in terms of flow rate of time of fill. Detailed analysis is done on four different models using four different materials Polycarbonate, Polypropylene, Nylon6 and Polybutylene terephthalate. Graphical display of result is presented and analyzed in terms of deviation in time of fill and flow rate from their original values. Remedies suggested for reducing the affects of wear and tear and replacement of the equipment.

Included in

Manufacturing Commons



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