A machine that places granules or powdered materials in a die hole and presses them into tablets with a punch is called a tablet press.
The earliest tablet press consisted of a pair of dies. The punch moved up and down to press the granular material into flakes. This machine was called a single-punch tablet press, and later developed into an electric flower basket tablet press. The working principle of these two tablet presses is still one-way tablet pressing based on manual compression molding, that is, the lower punch is fixed during tablet compression, and only the upper punch moves to pressurize. Due to the inconsistency of the upper and lower forces in this tablet pressing method, the density inside the tablet is not uniform, and problems such as splits are prone to occur.
Aiming at the shortcomings of the unidirectional tablet press, a rotary multi-punch bidirectional tablet press was born. This kind of tablet press presses up and down uniformly at the same time, so that the air in the drug particles has enough time to escape the die hole, which improves the uniformity of the tablet density and reduces the phenomenon of splitting. In addition, the rotary tablet press also has the advantages of low machine vibration, low noise, low energy consumption, high efficiency and accurate tablet weight.
Rotary tablet press machine is a machine that presses granular materials into tablets by means of a plurality of punches evenly distributed on the turntable that move up and down in a circle according to a certain trajectory. The tablet press whose linear speed of the punch rotates with the turntable ≥ 60m/min is called a high-speed rotary tablet press. This high-speed rotary tablet press has a forced feeding mechanism, and the machine is controlled by a PLC. It has automatic pressure adjustment, control Functions such as tablet weight, discarding waste, printing data, and displaying fault shutdown can control the difference in tablet weight within a certain range, and can automatically identify and eliminate quality problems such as missing corners and loose slivers.
The shape of the tablet pressed by the tablet press is mostly oblate at first, and later developed into a shallow arc shape and a deep arc shape on the upper and lower sides, which is for the needs of coating. With the development of special-shaped tablet presses, oval, triangular, oblong, square, rhombus, circular and other tablets are produced. In addition, with the continuous development of preparations, due to the requirements of compound preparations and time-release preparations, special tablets such as double-layer, triple-layer, and core-coated tablets have to be made on special tablet presses.
With the development of market demand, the scope of application of the tablet press is becoming wider and wider. It is no longer limited to pressing Chinese and Western medicine tablets, but can also widely press health food, veterinary medicine tablets, and chemical tablets: such as mothballs. Hygienic balls, washing blocks, Smurf blocks, art powder cakes, pesticide tablets, etc., food tablets: chicken essence blocks, Banlan root blocks, Divine Comedy tea blocks, compressed biscuits, etc.