Injection Molds

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.

Injection mold heat control of injection molding machine and mold's thermal conductivity is the key to producing injection-molded parts. Mold and is made of plastic (thermoplastics) caused by radiative heat transfer of heat to the material and mould steels through the convective pass heat conductive fluid. In addition, the heat through the thermal radiation is passed into the atmosphere and shuttering. Heat conductive fluid absorbs heat from the mold temperature machine to take away. Stencil thermal equilibrium can be described as: P=Pm-Ps. P is for mold temperature controller removed heat; the heat introduced by Pm plastic; Ps to mold to the atmosphere's heat. Purpose of controlling mold temperature and mold temperature on the effect of injection molded parts in injection molding process, the main purpose of controlling mold temperature is the mold is heated to operating temperature, and second, maintain a constant temperature working temperature. The success of the above two points, optimized cycle time to ensure stable high quality injection molded parts. Mold temperature will affect the surface fluidity, shrinkage, cycle time and distortion and so on. Mold temperature too high or less will have a different impact on different materials. Thermoplastics, die a little higher temperature will usually improve the surface quality and liquidity, but will extend the cooling time and cycle time. Low mold temperature will reduce shrinkage in the mold, but will increase after stripping the shrinkage of injection molded parts. Thermosetting plastic, higher mold temperatures usually decrease cycle time, and timing by parts cooling time required. In addition, plastic processing, higher temperature also reduces the plasticizing time, reducing cycle times.