About the die composition of the tablet press1
The earliest tablet press consisted of a pair of punches. The punch moves up and down to compress the granular material into tablets. The machine was called a single punching machine, which was later developed into an electric flower basket tablet press. The working principle of these two tablet presses is still based on the one-way pressing of the manual press, that is to say, when pressing the tablet, the lower punch is fixed, and only the upper punch moves and presses. In this tableting method, due to the inconsistency of the upper and lower forces, the density inside the tablet is not uniform, and problems such as splitting are prone to occur. Aiming at this shortcoming of the unidirectional tablet press, a rotary multi-punching bidirectional tablet press was born.