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In injection molds, the most common type of injection gate is the pinpoint gate. As many authors in the field of injection mold design diverge on the recommended dimensions for the pinpoint gate, the idea behind this study is to guide future mold projects for the better gate dimensions for each shape of the part to be made. Following previous studies about the pinpoint injection gate, this new study was conducted to broaden the applicability of the results. The first study was based on a flat, rectangular piece. Now, for different sets of results and to be able to apply them for a different shape of injected part, a rectangular box was used for the simulation. As with the first study, the objective is to analyze the results and to recommend the best gate dimensioning for the new shape, based on the performance of each dimension simulated.

Injection is one of the most used methods on plastic molding. The development of the mold is a very important procedure and requires time before the product is injected. An injection mold has a main runner, a secondary runner and the injection gate. The submarine gate is widely used, for allowing the automatic parting of the injected product from the runner system at the time the mold is opened. By literature reviewing, it can be noticed that the authors do not have accordance relative to the diameter dimensions of the secondary runner and the injection gate. This research's objective is to analyze and compile the best indicated values, with the aid of CAE tool, to submarine gates, for them to be used as reference for future studies.

On an injection mold, the runner system is divided in: main runner, secondary distribution runners and injection gates. As for the injection gates, one of the most widely used designs is the pinpoint gate, for being simple and leaving small marks on the injected part. In the literature, the authors diverge for the values for the optimization of the gate, recommending further studies for each application. On that note, the objective of this study is to analyze through CAE the values recommended for the pinpoint gate in order to obtain the optimized injection process, varying the material, shape and thickness of the product. At the end of the study, a reference chart will be presented with the gate dimensions that were the most efficient in the computer simulation for each type of part, to aid in the project of future injection molds.