Rotary tablet press is mainly composed of working turntable, filling mechanism, filling adjustment mechanism, guiding device of upper and lower punch and pressure adjustment mechanism. The working turntable is composed of 3 parts: upper layer for upper punch, middle layer for middle die, and lower layer for lower punch, with filling hopper in the middle position.
The working principle of rotary tablet press is to install several pairs of punching dies in a circular shape on the working turntable, and the tail of each upper and lower punch is controlled by the fixed lifting guide; the working turntable is driven by the transmission equipment to rotate, so that the upper and lower punches rotate synchronously with it, and at the same time are controlled by the guide to do the axial lifting movement, and the particles in the filling hopper are continuously added to the punching dies; the press wheels are installed above the upper punch and below the lower punch, and when they rotate to the When each of them rotates to the press wheel, the material is continuously pressed into tablets and continuously discharged.
The rotary tablet press can be divided into ordinary rotary tablet press, high speed rotary tablet press and sub-high speed rotary tablet press according to the height of the rotating edge, and its output is between tens of thousands to hundreds of thousands of tablets per hour to meet different production needs.
(1) At present, the Zgao speed of domestic ordinary rotary tableting machine can only reach about 30r/min, and the production capacity is low, generally around 100,000 tablets/h.
(2) The rotating speed of high-speed rotary tableting machine is generally about 50-90r/min, and the production capacity is about (200-500) million tablets/h.
(3) In the actual production process, especially the production of some products with medium batch and multiple specifications, the choice of ordinary rotary tableting machine is difficult to undertake the task, while the choice of high-speed rotary tableting machine will be too high investment and low utilization rate of the situation, can choose the production capacity between ordinary and high-speed sub-high-speed rotary tableting machine. Compared with the high-speed tablet press, the sub-high-speed tablet press has the advantages of simple structure, low price and low operating cost. The Zgao speed of the rotary table of the sub-high speed rotary tablet press can reach about 40r/min, and its production capacity is about (200~260) million tablets/h.
The rotary tablet press is widely used inside and outside the country because of its small vibration, low noise, low energy consumption, high output, stable quality and suitable for large-scale production, etc. It has become the main machinery and equipment for tablet production.