How to control injection mold temperature
2023-11-02
Plastic Injection molding temperature control plays a crucial role in the process of plastic injection molding. Correct temperature control can ensure stable product quality, improve production efficiency and reduce production costs. This paper will discuss the importance of temperature control, the basic principles and common methods of injection molding temperature control and the development trend of temperature control technology. 
First, the importance of temperature control Plastic injection molding temperature control is one of the key factors affecting product quality. During injection molding, the plastic needs to be heated to a certain temperature in order to melt it and form the desired shape in the mold. If the temperature control is not accurate, it can cause the following problems: 1. Unstable product size: too high or too low temperature will lead to changes in product size, so that the product can not meet the design requirements. 2. Product appearance defects: Improper temperature control will lead to traces, fusion marks, bubbles and other defects on the surface of the product, affecting the appearance quality of the product. 3. Unstable product performance: Inaccurate temperature control will lead to changes in mechanical properties, physical properties and other performance indicators of the product, thus affecting the service life and reliability of the product. Second, the basic principles and common methods of injection temperature control The basic principle of plastic injection molding temperature control is to determine the appropriate temperature range according to the melting point and melt fluidity of the plastic. Common temperature control methods include: 1. Mold temperature control: By controlling the temperature of the mold, the cooling rate and shrinkage rate of the injection parts can be adjusted, thus affecting the dimensional stability of the product.The commonly used mold temperature control methods include water cooling and oil cooling. 
2. Nozzle temperature control: The control of nozzle temperature has an important impact on the stability of injection molding and product quality. By controlling the nozzle temperature, the deterioration and thermal decomposition of the molten material at the nozzle can be prevented, and the appearance quality of the product can be improved. 3. Screw temperature control: screw temperature has a direct impact on the plasticization and melt fluidity of plastics. Reasonable screw temperature control can fully plasticize plastics, improve the stability of injection molding and product quality. 4. Melt temperature control: melt temperature refers to the temperature of molten plastic in the injection molding machine, which directly affects the fluidity and filling performance of plastics. By controlling the melting temperature, the filling condition of the product can be adjusted, and the defects such as warping, short flow and short filling can be reduced. Third, temperature control technology development trend With the continuous development of injection molding technology, temperature control technology is also constantly innovating and improving.
