Physics of tablet compression

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Fo hardness of tablet which set of punches play vital role?
Upper punch
lower punch

what is the role of fine powder during compression?

If compression machine speed is increased By keeping all parameters same what will be the effect on Tab hardness?

Upper Punches

No
lower punches are involved in tab compression pressure

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Exact ,but u asked which punches having vital role, both punches required here.

Can u tell on which punches we applied pressure to lowering the thickness

Presure is increased or decreased by movement of lower comp wheel
so hardness is controlled by lower punches and thickness is inversily propotional to hardness to also controled by lower punches

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Not that much effect on Tablet hardness, but
May be tablet hardness decreases because the contact time between the tablet/powder & punches decreses

hardness decrease due to decrease dwell time

both are req but lower are directly involved

kindly review and coment

…k Thanks

well come

10-15 percent fine is req to fill void spaces b/w grains during die filling.

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Which is more effective?
Plain Die
Tappered Die

Presure is increased or decreased by movement of lower comp wheel, BUT
In some machines like Cadmach( Cadpress || ) Presure is increased or decreased by movement of UPPER comp wheel, That’s I’m told u ans of ur question is upper Punches.
Now it’s depend upon the machines

Presure is increased or decreased by movement of lower comp wheel, BUT
In some machines like Cadmach( Cadpress || ) Presure is increased or decreased by movement of UPPER comp wheel, That’s I’m told u ans of ur question is upper Punches.
Now it’s depend upon the machines

upper wheel are frely movable they just countr the lower wheel effect.
They can be raised or lowered once during seting if required then remain fix.
usually in case of double layer tabs uper wheel pressure is increased or decreased to counter the lower punch once in setting.
Pressure is always applied when lower punches move over lower wheel.and lower wheel is conected with hardness controller.and we increase or decrease hardness by moving controller clock wise or anti clock wise direction.by controller movement wheel is lifted up or down so pressure is increased or decreased.