A new mixing head features a patented servo-driven ceramic valve system that is said to simplify metering and dispensing of two-component reactive materials such as PUR, silicone, or epoxy by reducing downtime for cleaning and maintenance.

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A new mixing head features a patented servo-driven ceramic valve system that is said to simplify metering and dispensing of two-component reactive materials such as PUR, silicone, or epoxy by reducing downtime for cleaning and maintenance. The novel design of the MS-C dynamic mixing system from Rampf Group, Inc., Wixom, Mich., employs no dynamic seals. Maintenance time is reduced because the ceramic valves do not require the frequent cleaning and rebuilding typically needed for needle valves. The ceramic valve and mixing sections are separate, allowing the mixing chamber and mixer to drop down with a quick coupling for a rapid changeover. Recirculation of components through the mixhead keeps the materials consistent from shot to shot. Temperature controls are available that stabilize the materials regardless of ambient conditions. Gear pumps meter the resin and catalyst entering the mixhead. The servo motor rotates the valve disks to the proper position, aligning the valve openings. The servo also speeds the mixer up to 6000 rpm to energize the materials and thoroughly blend them. Then the shutoff valve is opened and the shot is made. The unit can mix two or three components at viscosities from 50 to 200,000 cps and dispense 2 to 120 g/sec. A rinsing system using solvent or high-pressure water automatically flushes the mixing chamber. (248) 295-0223 • www.rampf-group.com