A new two-component mixing head features a patented, servo-driven ceramic valve system. The RAMPF MS-C dynamic mixing system simplifies two-component meter, mix and dispensing operations by reducing downtime for cleaning and maintenance. This is accomplished by a ceramic valve disk system with no dynamic seals. Maintenance time is reduced because the ceramic valves do not require the frequent cleaning and rebuilding of needle valves. The ceramic valve and mixing sections are separate, allowing the mixing chamber and mixer to drop down with a quick coupler for a rapid change. Recirculation of the components through the mix head keeps the materials consistent from shot to shot. Temperature-control systems are available that stabilize the materials regardless of ambient conditions.
The process begins with gear pumps precisely metering the resin and catalyst entering the mixing head, ensuring that the correct mix ratio is held. The MS-C servo motor rotates the valve disks to the proper position, aligning the valve openings. The servo also turns the mixer up to 6,000 rpm to energize and thoroughly blend the materials. The shutoff valve is opened and the shot is made. The MS-C is capable of dispensing 2 g/sec. and up to 120 g/sec., and mixes two to three components at viscosities of 50-200,000 cps. A rinsing system of either solvent or high-pressure water automatically flushes the mixing chamber.
Two-component reactive materials, such as polyurethane, silicone or epoxy, consist of a resin and a catalyst. The materials must be metered to the proper mix ratio, mixed and dispensed. Some materials, such as polyurethane and silicone foams, require dynamic mixing - blending the two components using a high-speed mixer. As the materials are continually metered and mixed, the system must be capable of maintaining an accurate mix ratio while dispensing multiple shots.
- Its internal ceramic valve system does not require frequent inspection, maintenance or cleaning.
- High output rates to 120 grams per second are possible, as well as precise dispensing down to 2 g/sec.
- Accurate mix ratios are consistently held.
- Precise nucleation levels are monitored by a RAMPF nucleation controller.
The new RAMPF MS-C combines simple design with high-tech ceramic materials to reduce downtime and keep production up and running.
For more information, contact RAMPF Group Inc., 50714 Century Court, Wixom, MI 48393; phone (248) 295-0223; fax (248) 295-0224; e-mail firstname.lastname@example.org; or visit www.rampf-group.com.