What adjustments and optimizations should be made in the design and manufacture of screw barrel for extrusion of blow molding?

In the process of design and manufacture, the screw barrel for extrusion of blow molding needs to be adjusted and optimized according to the characteristics of different types of plastic raw materials to ensure that the equipment can operate efficiently and stably and produce high-quality products. The following are some major adjustment and optimization measures:

According to the melting temperature and viscosity characteristics of plastic raw materials, we need to carefully design the geometric parameters of the screw. The diameter, pitch, helix angle of the screw and the length of each functional section will affect the melting, mixing and conveying effect of plastic raw materials in the screw and barrel. Therefore, according to the characteristics of specific raw materials, through calculation and experimental verification, we will determine the best combination of screw geometric parameters to ensure that raw materials can be fully melted and evenly mixed.

For raw materials with strong corrosiveness, such as PVC, we need to choose materials with higher corrosion resistance as the base material of the barrel, and adopt stricter surface treatment technology to enhance the corrosion resistance of the inner wall of the barrel. At the same time, we also need to take a series of measures in the design and manufacturing process to reduce the contact area and time between raw materials and the inner wall of the barrel, so as to reduce the corrosion risk.

In addition, according to the extrusion process requirements of different types of plastic raw materials, we need to adjust and optimize the overall structure and control system of the equipment accordingly. For example, for the production of products that need accurate control of extrusion quantity, we will adopt high-precision metering device and advanced control system to realize accurate control of extrusion quantity; For raw materials that need high-temperature extrusion, we will optimize the heating system and insulation structure of the barrel to improve heating efficiency and temperature uniformity.