Injection mold temperature points in uneven, is connected to the injection points in the cycle. Mold temperature controller is to maintain a constant temperature of between 2min and 2max, in other words prevent fluctuations in the temperature difference in the production process or gap from top to bottom. 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, displays the temperature and mold temperature controller are not consistent; die considerable temperature fluctuations, because the effect of thermal factors not directly measuring and compensating for these factors include changes in injection cycle, injection speed, melt temperature and room temperature.
Second is direct mold temperature control. 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 the main features include: set temperature and mold temperature controller line effect on thermal factor can be directly measured and compensated. Generally, mold temperature stability better than by controlling fluid temperature. In addition, the mould temperature control in the control of the production process repeatability. Third, joint control. Joint control is a comprehensive method, it can control the fluid and mold temperature. In joint control, temperature sensor location is extremely important in a mold, place the temperature sensor, the location of the shape, structure and cooling passages must be considered. In addition, the temperature sensor should be placed in the molding place where quality plays a decisive role. Connects to one or multiple mold temperature controller to controller of injection molding machine in many ways. From the operation, reliability and anti-interference considered best to use a digital interface.