The Plasticating Sequence in Barrier Extrusion Screws Part II: Experimental Assessment

Abstract

A modular laboratorial single screw extruder was used to perform screw pulling experiments and generate data on the development of plasticating of two polymers along the axis of a Maillefer barrier screw. The effects of the presence of the barrier (by comparison with an equivalent conventional 3-zone screw), of its geometrical parameters and of operating conditions were investigated and compared to the predictions provided by a previously developed computational model. Although the small size of the extruder influenced solids conveying and induced premature and quick melting, the two sets of data were generally in satisfactory agreement.

Keywords:

• Barrier screws
• Melting
• Modeling
• Single screw extrusion

Notes

Color versions of one or more of the figures in the article can be found online at www.tandfonline.com/lpte.