Temperature Controlled Tooling
Production presses heat up through a number of mechanisms, and the die wall can be surprisingly hot. Compaction of powder creates heat due to: compression of gas, plastic deformation, elastic deformation, particle friction, and friction with the tooling. Repeated compaction in a tablet press can lead to high temperatures at the die wall, and a warming up through the batch as the press turret and tooling heat up.
Tablet development work is usually performed at ambient lab temperatures, which can lead to temperature related problems remaining undiscovered until too late in the development cycle.
Typical problems may be: transformation, sticking, lubricant effects, or dissolution changes.
Project risk can be greatly reduced by studying the effects of temperature on the compaction process. Temperature and strain rate effects should be studied together.
Simulates the real temperatures experienced during production
Production tooling may be modified for use
Controls integrated into the machine test software
Temperature data is automatically recorded
Die and punches may be controlled to different values
Boundary temperatures for acceptable quality tablets can be explored
Control accuracy typically +/- 1 Deg. CSelf-tuning temperature controllers
Control accuracy typically +/- 1 Deg. C