|Servo & Standard & Variable Pump
all electric injection molding machines,
plastic products making machine
In the injection process, the main purpose of controlling the temperature of the mould is to heat the mould to the working temperature, and the second is to keep the temperature of the mould constant at the working temperature. If the above two points are successful, the cycle time can be optimized to ensure the stable high quality of injection parts.
Mold temperature will affect surface quality, fluidity, shrinkage, injection cycle and deformation. Excessive or insufficient die temperature will have different effects on different materials. For thermoplastics, higher die temperature usually improves surface quality and fluidity, but prolongs cooling time and injection cycle. A lower die temperature will reduce the shrinkage in the die, but it will increase the shrinkage of the injection parts after demoulding.
For thermosetting plastics, higher die temperature usually reduces cycle time, which is determined by the cooling time of parts. In addition, in plastic processing, higher die temperature will also reduce plasticizing time and cycle times.
Thermal balance control of injection moulds and heat conduction of injection moulds is the key to the production of injection moulds. Inside the die, heat from plastics (such as thermoplastics) is transferred to the material and the steel of the die by thermal radiation, and to the heat conducting fluid by convection.
In addition, heat is transferred to the atmosphere and the die base through thermal radiation. The heat absorbed by the heated fluid is taken away by the thermostat. The thermal balance of the die can be described as P=Pm-Ps. In the model, P is the heat carried away by the mould temperature machine; Pm is the heat introduced by the plastic; Ps is the heat emitted from the mould to the atmosphere.
Contact Person: Mr. Michael