What are the effects of injection molding production conditions on products?

Author: MULAN – Plastic Molding Manufacturer

Simply put, the performance complexity of plastic raw materials determines the complexity of the injection molding production process. The performance of plastic materials is due to different varieties, different injection molding production and processing conditions, different grades, and even different batches. Different injection molding performance parameters will lead to different results.

The impact of injection molding production time on the molding process is manifested in three aspects (1) Due to the shear characteristics of the plastic melt, the viscosity of the melt will be reduced. In order to fill the cavity, the required injection pressure must also be continuously reduced. (2) The injection pressure required to fill the cavity should also be increased (3) The greater the shear heating, the less heat will be dissipated through heat conduction, so the higher the temperature of the melt, the lower the viscosity, and the required time to fill the cavity The lower the injection pressure. Injection temperature is also an issue.

The melt flows into the cooled cavity, losing heat due to heat conduction. At the same time, the heat generated by shearing may be more or less than the heat generated by heat conduction, which is caused by various factors, mainly depending on the injection molding conditions. In addition, the viscosity of the melt decreases with increasing temperature.

Therefore, the higher the temperature during injection molding production, the lower the viscosity of the melt and the lower the required filling pressure. During the entire injection molding production process, different conditions have diverse effects on injection molding products.