The Study of Submarine Gate Shapes and Degating

In the injection modeling process, a good degating might be the key factor to minimize the possible failures. Therefore, this study discusses the design of a D-type submarine gate that provides optimum degating by changing the rotation angle (θ) of the gate axis, which is on the plane of rotation, around the origin of the coordinate. In the process of injection modeling, the degating occurs during the stage of ejection. A higher ejection force often comes with a temperature rise, which speeds up the in-mold ejection mechanisms wear-out and reduces life cycle. Therefore, this study is focused on how to reduce the force area and thus increase its stress. ANSYS Workbench, Computer Aided Engineering (CAE) software is used in this study to calculate the stress generated in the automatic degating of a submarine gate. The results could be inferred that the D-type submarine gate with θ=45 has superior degating performance than that of the gate with θ=0.