Better tablet quality - especially for smaller tablets and low
compression forces.
As other tablet press manufactures Courtoy tablet presses offer automatic
weight control based on measurment of the main compaction force. However,
Courtoy also has a unique alternative - Courtoy presses are capable
of controlling weight based on measurement of thickness variations under equal
force (displacement) at pre-compression.
This displacement system offers many important advantages over the
conventional system based on compaction force. These advantages are even more
crucial in case of bi-layer tablet production.
The Courtoy bi-layer tablet press with ‘displacement monitoring’
Courtoy Double-sided tablet presses has been specifically designed and
developed for the production of quality bi-layer tablets and provides:
- displacement weight monitoring / control for accurate and independent
weight control of the individual layers
- low compression force exerted on the first layer to avoid capping and
separation of the two individual layers
- increased dwell time at precompression of both first and second layer to
provide sufficient hardness at maximum turret speed
- maximum prevention of cross-contamination between the two layers
- a clear visual separation between the two layers
- maximised yield
Displacement-monitoring/ control system for bi-layer compression
The pneumatic compensator
Tablet weight control using ‘displacement’ is based on the measurement
of thickness variations under constant force and is measured at
pre-compression. This measurement is possible when using the
‘pneumatic compensator’.
The displacement-tablet weight control principle is fundamentally different
from the principle based upon compression force. When measuring displacement,
the control system’s sensitivity does not depend on the operating point on the
graph (it does not depend on the tablet weight) but depends on the applied
precompression force. In fact, the lower the pre-compression force, the more
sensitive the monitoring / control system and this is ideal for good interlayer
bonding of the bilayer tablet.
Read more about
bi-layer tablet production.