The barrel temperature can be roughly divided into three areas:
The feeding area is close to the area of the hopper. Under normal circumstances, the temperature setting is lower. Around the melting point of the plastic, this section is mainly preheated material. If the temperature is too high, the plastic will melt, the screw will easily slip and affect the material conveying. If it is too low, the screw torque will be too low. Big.
In the plasticizing zone, in the middle part of the barrel, the temperature gradually rises above the melting point. This section is mainly melt-plasticized material. If the temperature is too high, the material is easily decomposed. Too low is not conducive to plasticization, and it will increase the torque.
The anti-smashing section is at the foremost end of the barrel and the nozzle part. The temperature of this section is slightly lower than the plasticizing section. The main purpose is to prevent the molten material from flowing out of the nozzle under the action of internal pressure. It should not be too low, otherwise the injection pressure will increase.