Fully automatic low-speed rotary tablet press

P-19 typeFully automatic low-speed rotary tablet press

The high-speed rotary tablet press is an improved tablet press designed to address the issue of uneven pressure distribution caused by single-sided compression in single stamping machines. It is currently one of the most widely used tablet presses in production. This rotary tablet press has a reasonable feeding method, small differences in tablet weight, high efficiency, and low noise. Due to the uniform pressure applied by both upward and downward flushing, the air in the drug particles has ample time to escape from the mold holes, improving the density uniformity of the tablets and reducing the phenomenon of fragmentation.

P-19 rotary tablet press：

IILow speed rotary tablet pressStructural features:

1The main work process is divided into: ⑴ filling; ⑵ Tablet pressing; ⑶ Release the film. The three procedures are carried out continuously, and there is an adjustment control mechanism for filling and pressing, accompanied by a nameplate for easy operation.

2This machine adopts a flow grid feeding mechanism, which can evenly fill the mold holes with materials and reduce the difference in sheet weight.

3. The side of the machine base is equipped with a powder suction box, which includes a blower, a powder storage room, and a powder filter room. When the machine is running at high speed, it produces flying powder and powder that falls from the middle mold, which is discharged through the powder suction nozzle to prevent sticking and blockage, and maintain smooth and normal operation.

4. The electric motor is installed inside the machine base, and a worm drive turntable is driven by a V-belt. A continuously variable speed pulley is installed on the motor shaft, and the speed can be adjusted freely through the movement of the motor. It is safe, reliable, and noise free to use.

5The upper half of this machine is a tablet pressing structure: it mainly consists of three parts: upper punch, middle die, and lower punch, which are connected into one. Around it, 19 sets of punch dies are evenly arranged on the edge of the turntable, and the tail of the upper and lower punch rods are embedded on a fixed curved guide rail. When the turntable rotates, the upper and lower punches move up and down with the curved guide rail to achieve the purpose of tablet pressing.

3、 Construction Description

1. The upper cover of the upper pressing wheel frame device is made of integral casting, with a pressing wheel installed in the groove. It is fitted on the crankshaft, and the outer end of the shaft is connected to a spiral spring with a mechanical rod. When the pressing wheel surface is under excessive pressure, the eccentric torque of the crankshaft acts to compress the spring, increasing the distance between the upper and lower pressing wheels and reducing the pressure to protect the safe use of the parts and the die. The pressure is adjusted by rotating the flower shaped handle to change the length of the spring, so that the pressure of the spring is just as needed.

2. Feeder device

Round bucket conical bottom hopper and moon shaped reflux grate feeder are used to feed the pressing wheel for pressing. The device of the feeder should be calibrated to the point where it will collide with the rotating disc surface, leaving a gap of 0.03-0.1 millimeters. The gap can be adjusted by the support device. The method of adjusting the powder quantity is to have a rolling screw at the top of the hopper rack. To adjust the height of the hopper and control the flow rate of the powder, its height must be based on the size and filling amount of the particles. It can be observed that the accumulated amount of powder in the grid feeder should not overflow to be qualified. After adjustment, tighten the side rolling screws.

3. 19 hole turntable device

The turntable is a one-piece casting with 19 vertically and uniformly arranged mold holes around it. There are 19 sets of stamping dies installed in the holes, which are mounted on a fixed vertical shaft and driven by a worm during operation. The overall turntable holds all the stamping dies and rotates clockwise.

4. Main body, lower guide rail, and lower pressing wheel device

The main body is a square box shaped structure with a rectangular groove containing a lower pressing wheel. A pair of heat-treated rail guides are installed on its plane and fastened with screws. When the lower pressing is in operation, its tail is embedded in the rail guide groove and moves up and down according to the slope of the groove. The end of the rail guide has a circular hole covered with a circular area sheet for the purpose of lower pressing. The lower pressing wheel is installed in the groove of the main body and is fitted on the crankshaft. The outer end of the crankshaft is connected to a helical gear and a worm, which rotates slightly through the reduction of the gear. When the eccentricity of the shaft is upward, the pressing wheel rises, and the pressure increases, resulting in a thinner sheet and a thicker sheet, thereby controlling the thickness and hardness of the sheet. The sentence is:. The markings on the watch plate correspond to the thickness of the tablet from 0-6. Due to the self-locking effect of the helical gear, adjustment is allowed during operation, but after adjustment, the middle flower shaped handle should be tightened.

5. C-type continuously variable transmission wheel device

It is installed on the motor shaft and has two inclined blades inside. It is supported by 12 spiral springs on both sides to generate positive pressure. The speed change method is to move the motor to change the distance between the two wheels. The triangular belt increases or decreases its radius in the active slot accordingly, and the speed changes due to the change in radius, thus achieving a certain range of continuously variable transmission requirements.

6. Transmission shaft with clutch device

The transmission shaft is horizontally installed in the bearing bracket, with a worm in the middle, a test handwheel at the front end, and a conical disc clutch at the rear end. There is a handle to control the switch and parking. The contact of the clutch is transmitted by the pressure of the coil spring. If the load of the machine exceeds the pressure of the spring, it will slip, so as not to cause serious damage to the machine.

7. Filling adjustment device

The filling adjustment mechanism device is located inside the main body, and a moon shaped filling track can be observed on the plane of the main body. It controls the filling amount by rising or falling through the action of a spiral. The scale on the dial on the disc ranges from 0-45, which is equal to 0.01 millimeters of filling amount per grid. When the disc is rotated for adjustment, the filling amount increases when turned to the right and decreases when turned to the left. A 0-15 gauge is installed on the right side of the disc as the filling amount, measured in millimeters.

P-19 typeFully automatic low-speed rotary tablet press