Type of tablet press machine
1.what is a tablet press？
Tablet press is mainly used for tablet process research in pharmaceutical industry. The tablet press is an automatic continuous production equipment for pressing particles into circles and shapes with a diameter of no more than 13mm and with words, symbols and graphic flakes. Some pharmaceutical tablet press in the tablet press when the burr and dust should be matched with the screen machine at the same time dust removal (more than two times), must meet the GMP specification.
2.Structural composition
The machine that puts the particle or powder material into the die hole and presses the tablet by the punch is called the tablet press.
The earliest tablet press is composed of a pair of die, the punch for up and down movement of granular material pressed into sheets, this machine is called a single stamping machine, later developed into an electric flower basket type tablet press. The working principle of these two tablet presses is still based on a one-way tablet press based on a manual die, that is, the press is fixed at the moment, and only the upstroke movement is pressurized. This way of pressing the tablet, due to the inconsistent force up and down, resulting in the internal density of the tablet is not uniform, easy to produce problems such as cracks.
In view of this shortcoming of unidirectional tablet press, a rotary multi-punch bidirectional tablet press began to be born. The pressing machine is pressed evenly at the same time, so that the air in the drug particles has plenty of time to escape the mold hole, improve the uniformity of the tablet density, and reduce the fragmentation phenomenon. In addition, the rotary tablet press also has the advantages of small machine vibration, low noise, less energy consumption, high efficiency and accurate weight of the tablet.
The rotary tablet press is a machine for pressing granular materials into tablets through a press wheel by the circular lifting movement of multiple dies distributed on the rotary table according to a certain track. The stamping rod rotates with the rotary table line speed ≥60m/min is called high-speed rotary tablet press, this high-speed rotary tablet press has a forced feeding mechanism, the machine is controlled by PLC, has automatic adjustment pressure, control sheet weight, eliminate scrap sheet, print data, display fault shutdown and other functions, in addition to the control sheet weight difference within a certain range, Quality problems such as missing corners and loose segments can be automatically identified and eliminated.
The sheet shape pressed by the tablet press is initially flat circular, and later developed into a shallow circular arc and a deep circular arc on both sides, which is for the needs of coating. With the development of special-shaped tablet press, oval, triangle, oblong, square, diamond, circle and other tablets are produced. In addition, with the continuous development of preparations, due to the requirements of compound preparations and timed release preparations, special tablets such as double layer, triple layer and core are made, which need to be completed on a special tablet press.
With the development of market demand, the scope of application of tablet press is also more and more wide, no longer simply limited to pressing Chinese and Western medicine tablets, but also can widely press health food, veterinary medicine tablets, chemical tablets: such as mothballs, washing blocks, smurf blocks, art powder, pesticide tablets, etc., food tablets: chicken essence block, isatis root block, divine Qu tea block, compressed biscuits.
3.Type of tablet press machine
1.single punch tablet press machine
single punch tablet press machine, , also known as a small desktop electric (manual) continuous pressing machine, is equipped with a pair of punching die, material filling depth, thickness can be adjusted. This kind of tablet press is suitable for pressing Chinese medicine tablets, western medicine tablets, chewable tablets, calcium tablets and other tablet forms, has the characteristics of high assembly accuracy, material excellent wear resistance, stable and reliable.
2.Rotary tablet press
The rotary tablet press is the representative of modern tablet press. has the functions of automatic control of tablet weight, pressure, automatic number of tablets, automatic elimination of waste tablets, tight closure structure, purification degree to meet the GMP requirements. This kind of tablet press has had great development in production, pressure signal collection, scrap and other technologies, the highest output is generally more than 300,000 pieces/hour, the maximum pre-pressure of 20kN, the maximum main pressure of 80kN or 100kN or more. , for example, GZPK3000 series high-speed rotary tablet press, PG50 series high-speed rotary tablet press and so on
