Injection mold temperature points in uneven, is about the point in the injection cycle. Mold temperature controller serves to maintain a constant temperature of between 2min and 2max, that is preventing the temperature differences in the production process or the gap fluctuated. Following several control methods suitable for controlling mold temperatures: fluid temperature control is the most common method, and control accuracy can meet most of the requirements. Using this method, displayed on the controller's temperature and mold temperature are not consistent; die considerable temperature fluctuations, because thermal factors have no direct effect measuring and compensating for these factors including changes in injection cycle, injection speed, melt temperature and room temperature. Second is direct control of mould temperature. This method is internal temperature sensor in the mold, which in the case of mold temperature control accuracy requirements are relatively high. Mold temperature control key features such as: set temperature and mold temperature controller line can directly measure the thermal effect and compensation. Generally, mold temperature stability better than by controlling the temperature. In addition, the mould temperature control in production process control repeatability. Thirdly, joint control. Joint control is the method of synthesis, it can control the flow and mold temperature. In joint control, location of the temperature sensor in the mold is extremely important when you place the temperature sensor, you must consider the shape, structure and location of cooling channels. In addition, the temperature sensor should be placed in the injection-molded parts where quality plays a decisive role. Connects to one or multiple mold temperature controller there are a lot of ways to the injection molding machine. From operational, taking into account the best reliability and anti-interference with a digital interface.