Dies for Multi-layer Pipe Extrusion

摘要

Spiral mandrel dies have significant advantages over other systems for the production of multi-layer pipes. In fact, some product developments have can be produced not only be the coextrusion technique, but also by sheathing with crosshead dies. Here, too, spiral mandrel dies have certain advantages. This article deals with various principles for designing spiral mandrel dies, reporting on systems that have been used in practice and on the experiences gained with them.