Mold design, parting choices is critical, which determines the structure of the MASTER thin wall injection molding . Should choose principles and MASTER plastic molding factory parts in accordance with the requirements of sub-surface to select the sub-surface. The plastic parts for the machine frame, surface quality, no special requirements, but in the process of winding finger contact face and workers more, so naturally formed on the end face of the best fillet. In addition, the part height 12mm, and the cross-sectional shape perpendicular to the axis is relatively simple and standardized.