The Working Principle And Characteristics Of High Speed Tablet Press Machine

The Working Principle And Characteristics Of High Speed Tablet Press Machine

Tablet press is the commonly used equipment in solid preparation, it will granular or powder material in the die hole by the punch compressed into tablets, with automatic high-speed tableting machine as an example to introduce the working process of the rotary tablet press, the transmission form and performance, on the basis of analysis of how the common faults of tablet tablet machine maintenance and maintenance, to ensure that the equipment can effectively run for a long time.

1. The working principle of high-speed tablet press

Automatic high speed tablet pressing machine, including filling, quantitative, prepressing, main pressing molding, sheet and other processes. The lower punch of the automatic tablet press is driven by the punch plate and moves from left to right along the upper and lower guide rail respectively. When the punch moves to the filling section, the upper punch moves upward to bypass the forced feeder. At the same time, the lower punch of the rotary tablet press moves downward by the action of the pull down CAM. The powder particles are filled into the cavity of the middle die hole by stirring the impeller of the forced feeder, and excessive filling is formed when the lower punch passes through the low point of the pull-down CAM. The punch of the tablet press continues to move with the punch plate, and the lower punch moves upward gradually after filling the CAM, and pushes the excess powder particles in the cavity out of the middle die hole, and enters the quantitative section. In the quantitative section, the upper surface of the filling CAM is horizontal, and the lower punch keeps the horizontal movement state. The quantitative scraper will scrape out the excess powder particles on the upper surface of the middle die to ensure that the filling amount of powder particles in each middle die hole is consistent. In order to prevent the powder in the middle die hole from being thrown out, the cover plate is installed after the quantitative scraper. The protective CAM of the tablet machine will pull down the lower punch, and the upper punch will move downward by the action of the lower pressure CAM. When the middle die hole is removed from the cover plate, the upper punch enters the middle die hole. When the punch passes through the pre-pressing wheel, the pre-pressing action is completed and then the main pressing wheel is completed. After the compaction action is completed by the extrusion of the main pressing wheel, the tablet CAM is pushed up and up, and the pressed pill is pushed out of the middle die hole, and the pill enters the tablet discharging device to complete the whole tablet pressing process.

2. Transmission system and characteristics of high speed tablet press

The main drive system of tablet rotary tablet press is to provide power for the tablet press. The automatic tablet rotary tablet press requires the speed of the main drive system to be adjustable and has enough torque at the same time. The speed of the automatic tablet press is stable and reliable under large impact load. The main drive system mainly includes high-power AC motor, frequency converter, tensioning wheel, large belt pulley, synchronous gear belt, small belt pulley, hand wheel, worm gear reducer, main drive shaft and other components.

The automatic rotary tablet press adopts frequency conversion technology to replace the mechanical speed regulation of stepless speed regulation motor. The advantages of frequency conversion speed regulation are energy saving and consumption reduction, reliable control, stable operation and low noise. Tablet tablet press inverter itself has over voltage, low voltage and over current multiple protection functions, such as actuators through output parameters can be real-time monitoring, once appear abnormal, protection function, frequency converter to control the main motor to stop operation, at the same time shows fault code, indicating the cause of the problem, and further guarantee the safe and reliable machine work.