The New Jersey Institute of Technology's
Electronic Theses & Dissertations Project

Title:	Analysis of the influence of natural wear and tear in gates and runners on the filling of a balanced multi-cavity injection mold
Author:	Adavelly, Ranga Reddy V.
View Online:	njit-etd1991-074 (xiii. [157] pages ~ 3.3 MB pdf)
Department:	Manufacturing Engineering Division
Degree:	Master of Science
Program:	Manufacturing Engineering
Document Type:	Thesis
Advisory Committee:	O'Brien, Keith T. (Committee chair) Levy, Nouri (Committee member) Chen, Rong-Yaw (Committee member)
Date:	1991-05
Keywords:	Mechanical wear Injection molding of plastics
Availability:	Unrestricted
Abstract:	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.