If the temperature of the injection machine is too low when cooling the mold, it may indeed cause warping or shrinkage problems. This is because mold temperature is one of the key factors affecting the quality of injection molding.
Low mold temperature can reduce the fluidity of plastic melt, resulting in insufficient filling of the mold cavity and leaving shrinkage marks on the workpiece. In addition, insufficient mold temperature can also affect the cooling rate and shrinkage rate of plastic in the mold. Excessive cooling speed may cause significant internal stress within the component, which can be released after demolding and cause to warping and deformation of the component.
Specifically, low mold temperature may cause the following problems:
Warping deformation: Insufficient mold temperature can cause uneven shrinkage of plastic during the cooling process, especially when the structure of the part is complex and the wall thickness is uneven, which is more prone to warping deformation.
Shrinkage marks: Due to the rapid cooling rate, the plastic melt did not flow and fill sufficiently in the mold cavity, resulting in concave or uneven surfaces on the workpiece.
Impact on appearance quality: If the mold temperature is too low, it may also reduce the surface glossiness of the parts, and even cause appearance problems such as water stains and poor luster.
To avoid these problems, the injection machine should maintain an appropriate temperature when cooling the mold. This usually requires comprehensive consideration based on factors such as plastic type, part shape, and wall thickness, and determining the optimal mold temperature range through experiments. In actual production, it is also necessary to regularly check whether the cooling system of the mold is operating normally to ensure the stability and control accuracy of the mold temperature.