Abstract
This experimental study describes the influence of runner system on rheological properties during the injection molding process. Economic effects on the amount of production are discussed as well. Autodesk Moldflow Synergy 2016 (Moldflow) was used for the study of the injection process. Three suggestions of the runner system, cold runner system, hot runner system and the combination of cold–hot runner system have been promoted. These three variants underwent the rheological and economic analysis. As a result, recommendations for the application of the runner system for the required amount of production have been suggested
Highlights
Injection molding is a thermodynamic cyclic process forming of polymer materials wherein material from a solid phase in a granular form is transferred into plastic state under the action of thermal and mechanic energy
Afterwards the material in a plastic state is injected at a high speed in a closed cavity of a mould which is tempered for injecting of thermoplastic at a significantly lower temperature than the temperature of the melt
The options described above have been compared from the economic point of view
Summary
Injection molding is a thermodynamic cyclic process forming of polymer materials wherein material from a solid phase in a granular form is transferred into plastic state (a state of melt) under the action of thermal and mechanic (dissipative) energy. Afterwards the material in a plastic state is injected at a high speed in a closed cavity of a mould which is tempered for injecting of thermoplastic at a significantly lower temperature than the temperature of the melt. The price of an injected part plays an important role. The price depends on the amount of the production, difficulty of injection mold, multiplicity of injection mold and the quantity of the used material. The aim of this experiment to determine the suitability of a runner system based on the amount of the production for the specific part. Any particular saving on the time or quantity of the used material causes an important financial saving
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