For those who often use film blowing machine, I believe that the film blowing machine is not unfamiliar at all, but there is one thing that the film blowing machine operators feel hate to doubt a problem, that is, the film blowing machine blown film control in how much temperature range is appropriate, because the temperature may directly or indirectly lead to the quality of the blown film machine blown film, so to control the temperature of the film blowing machine.
　　At the beginning of the melting section, the temperature reaches the viscous flow temperature in order to melt, and for crystalline resins, the viscous flow temperature is equal to the melting point temperature. Then compressing and increasing the melt layer, the temperature needs to be raised continuously to make the resin molecular chain of different lengths and different thermal movement energy of the polymer melt successively, thus the temperature at the end of the melt section is established, and it can be set as a linear temperature rise in other parts of the section.
　　At the entrance of the charging section, it is hoped that the temperature is lower to prevent the resin from sticking to the flow and blocking the inlet, in addition, the resin is continuously compressed in the charging section and the air should be discharged from the charging port upside down. Depending on the equipment structure, the charging port is not electrically heated, but heat is transferred through the barrel and the charging so that the temperature of the charging section is determined. The inlet is 50-90 degrees and the end is equal to the melting point or viscous flow temperature, which can be set as a temperature isometric linear temperature rise on this section.
　　For blown film machine extrusion temperature control points are
　　Different blown film film process temperatures for different kinds of resins;
　　The same kind of resin, type and melting index is different, the process temperature of blown film is different, the index is large with good fluidity and low temperature.
　　The same kind of resin, different thickness film, process temperature is also different, processing thick film, process temperature can be a little higher, the temperature of the film mouth can also be a little higher, conducive to reducing viscosity, improve productivity.
　　How to control the temperature of the film blowing machine measures I have introduced so much, I hope to bring you help!