Blenders Brochure - Wittmann - #3

A unique 3-stage metering method achieves the most precise dispensing for batch-to-batch consistency and accuracy. This is accomplished by using progressively smaller dispensing algorithms to approach the target weight. Only one standard high precision valve is used for pellets, regrind and powder.

Free-flow

Coarse pulsing

Quick dispensing to neartargetweight.

Controlled quick dis­pensing to be within grams oftarget weight.

Controlled high frequency dispensing preciselyto target.

Fine pulsing

Byensuring batch-to-batch accuracy by means of RTLS (Real Time Live Scale) techno­logy the operator can set the percentages to the required minimum level. As competitive blending methods are constantly overdosing and underdosing the minimum needs to be set to allow any underdosed batch to still be at the requested percentage. This results in overdosing all other batches, sometimes even significantly, causing tremendous excess material usage. RTLS can pay for itself in just a couple of months!

Batch-to-batch accuracy means no overuse of high cost resins, optimizing the material consumption forthe product requirement. Every batch is consistentand tothe desired formula. No "hunting" or statistical averaging to achieve the required target.

In the above example, a blend of 1.8 g has been set. Real data demonstrates the difference between RTLS and competitive methods.