Features and working principle of high-speed rotary tablet press
Features of High Speed Rotary Tablet Press
The high-speed rotary has fast speed, high output and good tablet quality. The adopts double presses, which are all controlled by a microcomputer. The high-speed rotary machine can continuously press granular materials into tablets. In addition to ordinary round tablets, it can also press special-shaped tablets of various shapes. It has the characteristics of fully enclosed, high pressure, low noise, high production efficiency, perfect lubrication system, and automatic operation. In addition, the machine is obviously superior to ordinary tablet presses in terms of transmission, pressurization, filling, feeding, punch guide rails, and control systems.
1 Working principle of high-speed rotary
The main motor of the high-speed rotary drives the turntable to rotate through speed regulation and deceleration by the worm gear. The rotation of the turntable makes the upper and lower punches move up and down relative to each other under the action of the guide rail. The granules are compressed into tablets through the processes of filling, pre-compression, main compression and tablet discharge. During the entire tablet pressing process, the control system realizes automatic control of tablet weight, automatic rejection of waste tablets, automatic sampling, and thermal printing of various statistical data for fault display through the detection, transmission, calculation, and processing of pressure signals.
2 Main structure of high-speed rotary
2.1 Transmission components of high-speed rotary
Your part is composed of motor, pulley, pulley reducer and adjusting handwheel, etc. The speed of the motor can be adjusted by the frequency conversion stepless speed regulator: after starting, the power is transmitted to the reduction worm gear through a pair of pulleys. The output shaft of the reducer drives the main shaft of the turntable to rotate, and the variable speed of the motor can make the speed of the turntable within a certain range.
2.2 Turntable and guide rail components of high-speed rotary are composed of upper and lower bearings, spindles, turntables, etc., and guide rail components composed of upper and lower guide rails. These constitute the movement track of the upper and lower punches. The turntable carries the punches for circular motion. Make the punch move up and down regularly, and the compound movement of the punch completes the filling of the particles and compresses the tablet (under the action of the pressing wheel). The working process of filming.
2.3 Feeder parts of high-speed rotary , the forced feeder is used for feeding granules, the power is transmitted to the gear of the feeder by a small DC motor through a small worm gear reducer, and the impellers for metering, batching and feeding are respectively driven, and the pellets are fed from the hopper The bottom enters the metering chamber, is mixed by the impeller, and then pressed into the batching chamber, then flows to the feeding chamber and is sent to the middle mold through the impeller through the discharge port. The feeding speed of the feeder can be adjusted by a stepless speed regulator according to different situations. Figure 1 The structure of the metering room, batching room and feeding room.
2.4 High-speed rotary filling and tablet discharge parts
For the control of the filling amount of granules, the lower punching and descending rails have been divided into five levels A, B, D, and E during the design. The range of each level is 4mm, and the limit is 5.5mm. One track. The filling adjustment range of the machine control system is 0~2mm. The control system obtains the detection signal from the pressure value of the pressure roller, and sends an instruction after calculation to make the stepping motor
Rotate, the stepper motor drives the filling adjustment hand wheel to rotate through the gear, so that the filling depth changes (as shown in Figure 2). The stepping motor makes the hand wheel rotate one step to adjust the depth to 0.01mm, and the left and right rotation of the hand wheel increases or decreases the filling depth. In Figure 2, the universal coupling 1 drives the worm and the worm wheel to rotate. There is a screw rod which can move up and down in the center of the worm wheel, and a filling rail is fixed on the upper end of the screw rod. Manually rotate the hand wheel 4 to make the filling rail move up and down, and the filling depth changes every time it rotates
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