In order to get high output from film extrusion:
1. For screw, we recommend to add some pins like below photos, for better plasticizing.
-- Barrier screw has function of separating melt from solid
2. For barrel, there are three types of water jacket and two types of feeding zoom.
1) No. 1 water jacket: the most simple water jacket
2) No.2 water jacket: integral water jacket
3)No.3 water jacket: split water jacket
The barrel also be splited into two parts.Split barrel and water jacket as below photos, which connect second part barrel with flange.
Split water jacket has the best performance for cooling, then integral ones.
4) There are two types of feeding zoom: one is line type, another is spiry-type, and the later one could feeding more.
Line grooves:
spiry grooves:
