New hybrid multi-layer extrusion die overcomes challenges of conventional tooling

Described as a next-generation multi-layer extrusion die that overcomes numerous challenges associated with conventional tooling, Guill Tool & Engineering (West Warwick, RI) has introduced a new version of its popular 800 series, known as the 800 Series Hybrid.

In some extrusion applications that utilize crossheads and inlines, layers of the same material are applied multiple times using a single die. This method is used to prevent errors caused by gels breaking through a thin wall, weld lines, inconsistent wall thickness, plus material and process variations. Difficult-to-process materials and demanding applications that call for zero-fault tolerance are also prone to error.

The 800 Series Hybrid retains the inherent benefits of the 800 Series, including a compact design, low residence time and a common deflector bore that eliminates tolerance stack up, while reducing unnecessary complexity and making the technology more affordable. This was achieved by overlapping layers in each semi-deflector using a single cone. The design of the 800 Series Hybrid reduces cost and size compared with other methods of overlapping layers, says Guill. 

According to the company, the essential benefits of the 800 Series Hybrid include:

The 800 Series Hybrid extrusion tool greatly reduces stagnation, because overlapping layers are more inherently balanced than single layers and also because each semi-deflector is “tuned to flush.” Conventional deflectors must simultaneously achieve a balance between flushing, balancing and eliminating the weld line, explains Guill. By reducing the difference between the slowest moving and fastest moving material in the deflector channels, more consistent viscosity is achieved.

Guill will exhibit at PLASTEC West (booth 2060), which returns to the Anaheim Convention Center in Anaheim, CA, on Feb. 7 to 9, 2017.