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
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
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.
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.