Guill Tool & Engineering Co. Inc. (West Warwick, RI) has launched the 500 Series crosshead with Mechanically Assisted Gum Space (MAGS) adjustment. The new extrusion crosshead is designed specifically for the flow characteristics and unique processing challenges of elastomeric compounds.
This new method of gum space adjustment allows the operator to make an effortless adjustment from a single point using a common socket wrench. No more need to struggle with multiple nuts and bolts in order to adjust gum space, which leads to quicker adjustments. The visual indicator on the core tube lets the operator see how far the gum space has been moved, making those adjustments much more accurate and repeatable.
The hardware-free and patented cam lock design of the 500 Series means no time is lost unbolting and re-securing fasteners for disassembly and re-assembly. Only half of a rotation of the cam nut is needed to loosen and automatically extract the deflector from the head body. Also, with no undercuts on the deflector, there are no material hang-ups when extracting the deflector, allowing for faster and easier cleaning and changeover.
Another benefit includes the latest Center-Stage concentricity adjustment system that greatly reduces pressure on the tooling, allowing easier and more precise concentricity adjustments without loosening the face bolts. Easy-Out inserts for the adjusting bolts also allow simple replacement of locked or damaged adjusting bolts, which further saves on repair and downtime.
The new rubber/silicone crosshead is a cast aluminum liquid-fed cooling sleeve that allows the operator to switch out the cooling jacket in the event of a line obstruction, again eliminating downtime compared to traditional integrated cooling systems.
The 500 Series design can also be adapted to fit any extruder design or line layout.
The addition of a newly designed flow inlet channel reduces the shear and heat that is generated as the materials are being processed. This leads to lower head pressures allowing the material to move through the head in a much more balanced and even flow.