The success of hot runner applications in plastic injection molds is directed to many factors. A good part and mold design along with the selection of the appropriate polymer and the selection of the right injection machine are critical, factors. The choice of position and runner input type at the inlet inlet for the plastic part design is much more to achieve successful results from the injection. After deciding on the runner entrance, it is necessary to make a correct choice among the various hot runner entry methods. Various methods have their advantages and disadvantages according to the requirements.