The VEL™ , Spiral Die module is used for the analysis and design of spiral mandrel type dies that are typically used in tubular film production. Based on the Control Volume Method (CVM) of mathematical analysis, this program can provide the user with an accurate prediction of the expected die performance. The new version has the capability of analyzing the complete die from the extruder adapter to the die exit. In addition, the effects of the post spiral sections, such as the relaxation chamber and the die lips, have been incorporated into the calculations for even better accuracy. The user-friendly, intuitive interface and CVM solution technique allows the user to optimize designs quickly and easily.

The VEL™ , Spiral Die module has been developed with the extrusion process engineer in mind. Many world class blown film extrusion die manufacturers use the Spiral Die module as a part of their daily design procedures. Many processors and technical service personnel use this module to study and analyze the effect of resin changes on their process. In addition to tubular film dies, this module has also been successfully applied to the design of profile, tubing, pipe and blow molding dies. In fact, any extrusion application requiring a uniform annular flow can benefit from the Spiral Die module. Combine it with the Multi-Layer module and you have all the tools you need to analyze and design spiral mandrel coextrusion dies.

The VEL™, Spiral Die module features:
- improved graphical design interface
- complete die analysis
- post spiral channel effects
- fast calculations
- improved image/results saving capability
- improved Material Database interface