EXAMINATION OF METHOD FOR DIAGNOSING MOLD FILLING IMBALANCES IN NEW MULTI-CAVITY MOLDS

摘要

During the startup and operation of new multi-cavity molds, it is expected that cavity-to-cavity filling variations will be found. This will occur despite the use of geometrically balanced runners. With cold runners, this imbalance is dominated by either steel variations in the mold, or shear induced variations developed in the runner. In order to correct the imbalances, it is important to be able to separate these two causes and to quantify their contribution. A method, here referred to as "The Five-Step Process" was developed for this purpose. This paper presents a study to determine how robust The Five Step-Process is in diagnosing steel variations in a mold.