What should I pay attention to during the injection molding process of my08 low viscosity pbt

MY08 low viscosity PBT (high fluidity) shows significant advantages in the injection molding process, which can achieve high-precision molding of complex structures and significantly improve production efficiency. However, in order to ensure the quality and stable performance of the product, strict control must be carried out in terms of process parameters, mold design, raw material selection and operation procedures.

The setting of injection molding temperature is crucial for the molding of MY08 low viscosity PBT. Its low viscosity characteristics enhance the fluidity of the material, but too high injection molding temperature may cause resin decomposition or thermal degradation, thereby affecting the mechanical and electrical properties of the finished product. Therefore, it is recommended to adjust within an appropriate temperature range to ensure that the resin is fully melted and does not undergo thermal degradation, while avoiding material discoloration or bubble generation caused by excessive temperature.

The control of mold temperature is also a key factor affecting molding quality. Properly increasing the mold temperature can improve the fluidity and filling effect of the material, and reduce defects such as cold material and shrinkage. However, too high mold temperature may prolong the cooling time and affect production efficiency. Therefore, reasonable mold temperature settings should be optimized according to the structure and size of the specific product to ensure uniform mold temperature and avoid deformation or stress concentration caused by local overheating or uneven cooling.

The adjustment of injection pressure and holding pressure directly affects the molding quality of MY08 low viscosity PBT. Due to its high fluidity, the injection pressure needs to be reasonably controlled. Excessive pressure may cause the mold to be overfilled, resulting in stress concentration, and even warping or deformation. Insufficient pressure may cause defects such as incomplete filling, bubbles and cold shut. In actual operation, the injection pressure and holding pressure should be gradually adjusted according to the wall thickness of the part, the complexity of the structure and the specific characteristics of the mold to ensure that the material fully fills the mold cavity without excessive stress.

Injection speed is also an important parameter affecting molding quality. The high fluidity of MY08 low viscosity PBT makes fast injection possible, but too fast injection speed may cause flash, bubbles or gas retention in the mold, resulting in pores and surface defects. Therefore, a reasonable setting of the injection speed, combined with pressure control, can achieve a smoother filling process and reduce the occurrence of defects.

In terms of the cooling system, the molding process of MY08 low viscosity PBT needs to pay attention to the cooling time and cooling method. Due to its good fluidity, the material fills the mold quickly, but too fast cooling may cause increased internal stress, which in turn affects dimensional stability and mechanical properties. The cooling channel should be reasonably designed according to the thickness and structure of the part to ensure uniform cooling and reduce internal stress and deformation.

In addition, keeping the mold clean and lubricated is the basis for ensuring molding quality, avoiding impurities or residues that affect the fluidity and molding effect of the material. During operation, the pressure, temperature, speed and other parameters of the injection molding machine must be strictly monitored to prevent quality problems caused by parameter fluctuations. Through fine regulation of various process parameters, MY08 low-viscosity PBT can achieve efficient and stable production during the injection molding process, meeting the market demand for high-quality plastic products.