Views: 42 Author: Site Editor Publish Time: 2022-01-07 Origin: Site
As an important industrial production technology,plastic extrusion blow molding machine converts plastic into useful products that can maintain the original performance. In order to keep the equipment in good use and filling, it plays a very important role in the debugging of plastic extrusion blow molding machine. The editor will show you how to adjust the temperature of the plastic extruder.
The temperature control of the plastic extruder mainly controls the barrel, nozzle and die from three aspects.
1. Barrel temperature
The temperature that needs to be controlled in the injection molding process includes the barrel temperature, nozzle temperature and mold temperature. The first two temperatures mainly affect the plasticization and flow of the plastic, while the latter temperature mainly affects the flow and cooling of the plastic.
Each kind of plastic has a different flow temperature. The same kind of plastic has different flow temperature and decomposition temperature due to different sources or grades. This is due to the difference in average molecular weight and molecular weight distribution. Plastics in different types of injection The plasticizing process in the machine is also different, so the temperature of the barrel is also different.
2. Nozzle temperature
The nozzle temperature is usually slightly lower than the maximum temperature of the barrel, this is to prevent the "salivation phenomenon" that may occur in the straight-through nozzle of the melt. The temperature of the nozzle should not be too low, otherwise the nozzle will be blocked due to the early solidification of the melt, or the performance of the product will be affected due to the injection of the early solidification material into the cavity.
3. Mold temperature
The mold temperature has a great influence on the internal performance and apparent quality of the product. The temperature of the mold depends on the crystallinity of the plastic, the size and structure of the product, performance requirements, and other process conditions such as melt temperature, injection speed and injection pressure, and molding cycle.