Document Type
Thesis
Date of Award
5-31-1991
Degree Name
Master of Science in Mechanical Engineering - (M.S.)
Department
Mechanical and Industrial Engineering
First Advisor
Keith T. O'Brien
Second Advisor
Nouri Levy
Third Advisor
Avraham Harnoy
Abstract
Intuition, prior experience, and trial and error experimentation have previously been the key factors in solving the mold design and process optimization problems, when there is a dimensional change in gates and runners due to wear and tear in multi-cavity injection molding. The effect of wear and tear of gates and runners of circular and rectangular geometries, using the flow analysis package MOLDFLOW have been studied. A mold with two rectangular cavities of volume in the ratio 2:1 has been taken as the reference model for the analysis. It is observed that the amount of imbalance due to wear and tear of gates and runners is a function of the rheological properties of the material being processed.
The wear of the gates is more critical than the runners. The effect of circular gate wear is more severe on the flow balance in the multi-cavity mold. It is not possible to bring the imbalanced flow, due to wear and tear of gates and runners, back to the original balanced state.
Recommended Citation
Vellanki, Krishna Siva Rama, "Analysis of the effects of wear and tear of gates and runners in the injection molding process for multi-cavity injection molds in natural imbalance" (1991). Theses. 2640.
https://digitalcommons.njit.edu/theses/2640
