Description:
Shear induced melt imbalances, developed in cold and hot runner molds, may be the single most significant contributor to spoilage in injection molding. Numerous studies have revealed that the industry standard geometrically balanced (commonly referred to as “naturally balanced”) runner designs regularly result in melt and filling imbalances exceeding 30%. This imbalance results in a small processes window, increased clamp tonnage, injection pressure and cycle time. Resultant product variations within a single shot include the size, weight and mechanical properties of the molded parts. This phenomena is the major factor limiting the ability to produce high precision parts in high cavitations tooling.

This online presentation will present the following: 1. An overview of the development of shear induced imbalances 2. How to identify, isolate and quantify the imbalance 3. How the resultant melt conditions effect low and high cavitation molds 4. Explanations as to how the MeltFlipper and new MAX™ technology manage the melt condition in a mold in order to neutralize the negative conditions developed by cold and hot runner systems. 5. The presentation will also provide information on how this technology can be used to influence two step processes such as gas assist injection molding, microcellular molding, structural foam and co-injection molding.