Extruder equal depth variable pitch screw of melt blown cloth machine

The constant-depth variable-pitch screw means that the depth of the screw groove is constant, and the screw pitch starts from the first screw groove of the feeding section to the end of the homogenizing section from wide to narrow.

The characteristic of the equal-depth variable-pitch screw is that due to the equal depth of the screw groove, the cross-sectional area of the screw at the position of the feeding port is large, and it has sufficient strength, which is beneficial to increase the speed of rotation, thereby improving productivity. However, the screw processing is more difficult, the melt flow rate is larger, the homogenization effect is poor, and it is rarely used.