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Powder Properties and Vibrator Benefits
Recommended Time & Tips
We recommend a vibration time of 30-60 seconds for most powders. Longer vibration times do not result in higher fill weights
for most powders other than fluid-like powders. While vibrating we recommend spreading the powder across the capsule bodies
to reduce fill weight variation. Remember to spread powder to all four edges of the filling surface.
For many powders (including fluid-like, fine and fluffy powders) you can achieve a higher fill weight with a combination of
vibration, spreading and tamping. Vibrate and spread the powder for 30-60 seconds. Use a Tamper to press powder gently into
the capsule bodies without forcing powder out of the capsule bodies. Repeat vibration and spreading followed by tamping.
After the final tamping, spread any remaining powder across the capsule bodies. For maximum fill weights, you can do up to
4 vibration spreading and tamping cycles. In general, we do not recommend more than 2-3 cycles as we have found that with all
powders we have tested, the fill weight does not increase by more than 1-2% after 3 cycles.
Due to wide variations in properties between powders, their grades and suppliers, your results will vary.
Benefits
Filling Time: For almost all powders, a vibrator used alone or in addition to tamping will reduce filling time. The filling time can
be reduced by 60 seconds or more.
Average Fill Weight: To achieve maximum fill weight, we recommend a combination of vibration and tamping.
Fill Weight Variation: For powders that are fluid-like, bridge or granular, a vibrator will reduce fill weight variation from capsule to
capsule compared to tapping or tamping alone.
Powder Types
We recommend vibration and spreading alone or in combination with tamping for powders that are:
sticky
fluid-like (including fine or flour-like)
bridge across the capsule bodies
granules or pellets
Examples of each powder type are on the next page.
Sticky Powders
Powder that sticks to Tamper pins can pull up capsule bodies after tamping, or can stick to Tamper pins and fall off onto Filler
surface. Use of a powder Vibrator eliminates Tamper pin contact with powder during filling.
Fluid-like including fine or flour-like
Fluid-like, fine and fluffy powders are pushed out of the capsule bodies when the Tamper pins enter. If you have to tamp more
than 2-3 times because powder is flowing out, a vibrator is very useful. A vibrator reduces the filling time by a few minutes or
more. For more information on vibration and tamping see section above – "Recommended Time & Tips.
Powders that Bridge
Some powders form a bridge at the top of the capsule body, leaving air pockets inside the capsule. The capsule appears full but
it is not. A Vibrator breaks up powder bridges and eliminates the air pockets resulting in a reduced filling time and more even fill
weights.
Granular Powders or Sustained Release Pellets
Tamping can damage granules or pellets. A powder Vibrator allows you to fill granules and pellets without damaging them.
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