The important parameters of the screw of the homogenization section of the extruder of the melt-blown cloth machine:

The groove depth H3 is determined by the empirical formula H3 = (0.02 ~ 0.06) Ds

The length L3 is determined by the following formula L3 = (20% ~ 25%) L

d. According to the melt transport theory, there are four forms of melt flow in the screw homogenization section. The flow of molten material in the screw groove is a combination of these four flows:

Positive flow-the flow of plastic melt along the direction of the screw groove between the barrel and the screw towards the direction of the machine head.