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| Seems Like a Simple Thing: Cracking the Hatch Before You discharge |
In this photograph we see a very simple thing: an operator cracking the hatch before he
discharges the final blend. This is often overlooked as a critical processing factor when
blending in either a double cone or a twin shell blender. Why? We need to release entrapped
air before we discharge the contents; especially if we are blending cohesive materials
(materials that tend to clump up like herbs). As the powders turn they entrap air over the 5 to
20 minute blend cycle.
With free flowing powders the air tends to release quickly and easily and one may discharge
immediately after cracking one of the hatches. With cohesive powders we recommended that
you wait three to five minutes and then discharge the powders.
What do you gain by doing so? In many situations you will have A more uniform powder blend
on the tablet press and much less entrapped air to worry about during tablet compressing.
Could that capping problem be a result of not eliminating the air before your discharge?
| Solid Dosage Training, Inc. FREE TECHNICAL HELP Blending |
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