A new liquid-color feeding system from Riverdale Global, Perth Amboy, N.J., automatically refills one or more color drums during the molding or extrusion process. The RGInfinity auto-refill system is said to eliminate downtime for switching drums and reduces the occurrence of transitional or off-specification product with little or no color.
The company supplies liquid color in its patented pump-equipped drums that remain sealed while color is metered to processing machines. The RGInfinity eliminates the need to replace these drums when empty by refilling them from a large central container, or “tote.” One tote can serve one machine or can be configured to refill multiple machines running the same color. Liquid color is completely sealed off from the workplace by sealed connections throughout the entire system—from tote to delivery tubes to drums to metering tubes.
Each drum is mounted on Riverdale’s gravimetric stand, which monitors the weight of color in the drum and signals a pump valve on the tote when the drum is nearly empty and again when it is full. This prevents uncolored product. When a tote needs to be replaced with a full one, the sealed connectors make possible a quick changeover. Riverdale can provide these central containers in various shapes and sizes. A typical example is a 200-gal rotomolded plastic vessel with a steel-supporting framework.
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Yet production is growing at a slower pace, a trend that is likely to continue.