Stainless steel mesh is the typical used meshes for extruder screens, and good material to avoid rust problems. Extruder screen meshes range is from 10mesh to 500mesh or more: 10 mesh is coarse, 40mesh to 60mesh is intermediate, and 100mesh to 500mesh is much fine mesh.
Most extruder screen meshes have a simple square mesh weave in each direction. A dutch weave has thicker wires in the horizontal direction and is specified by two numbers-for example, 24 x 100 mesh or 30x150mesh.Dutch weave allows fine filtration without requiring multiple thin screens in a screen pack.
Traditionally,extruder screens are inserted with the coarsest mesh against the breaker plate and the finest mesh facing the screw. For example, the mesh arrangement from breaker plate to screw might be 40 mesh/60 mesh/80 mesh. This construction keeps screens from breaking and “blowing” contamination through the breaker-plate holes.
Leave a Reply