At the entrance of the feed section, the temperature is expected to be lower, preventing the resin sticking from blocked the inlet mouth. In addition, the resin in the feed section is constantly tightened, and the air should be discharged from the ingredient mouth. According to the different equipment structure, although the feed mouth does not perform electric heating, it passes through the heating of the barrel, and the temperature of the feed mouth is about 50-90 degrees.
In this way, the temperature of the feeding section is confirmed. The entrance is 50-90 degrees, and the end is equal to the melting point or sticky temperature, which can be fixed as a temperature such as the temperature such as the temperature.
Melving section temperature requirements
At the beginning of the melting section, the temperature reaches the sticky temperature to melt. Regarding the crystal resin, the sticky temperature is equal to the melting point temperature. Then constantly tightening and increased the melting layer, the temperature needs to be continuously improved, so that the resin molecular chain is short and short. The high molecules of different thermal exercise energy have melted. Therefore Other parts are warmed up.
Memory section temperature requirements
In the equalization section, it is mainly melting equalization and quantitative fixed-pressure constant temperature output melt. The temperature of this section can remain stable, or the temperature at the end of the melting section is slightly increased (about 2-5 degrees).
Regarding the film blowing film, the temperature of the head is required to be lower, but it cannot be lower than the sticky temperature, which is convenient for the lift and normal membrane. When the melt comes out of the mold port, it must be viscous, so as not to break the membrane, collapse and other phenomena. Generally, it is about 10-30 degrees lower than the end of the average segment, and it can also be regarded as a different temperature drop from the average section to the temperature of the mouth.
