Rotary Tablet Press

ZP series rotary tableting machine is an automatic rotary continuous tableting machine, which compresses granular raw materials into tablets, which can be widely used in various specifications of round and special-shaped tablets in chemical, food, electronics and other departments. ZP series tablet presses comply with GMP standards for pharmaceutical production and quality management. The tableting chamber is separated from the transmission mechanism. The tableting chamber is free of any paint. The parts in contact with the drug are made of stainless steel or specially treated on the surface, which is non-toxic and corrosion-resistant. .

ZP series tablet press transmission system, rails and main friction parts are fully lubricated, noise and wear are reduced, maintenance costs are greatly reduced, and the filling requirements of powder and other raw materials are met. Handwheels for tablet pressing, tablet thickness, filling and speed adjustment, all kinds of indicator lights, signs and buttons are located in the same direction, which is convenient for observation and operation.

Rotary Tablet Press Working Principle

For the pharmaceutical industry, a tablet press can automatically or manually compress granulated or granulated western medicine powder into tablets of different sizes.

The working principle of the rotary tablet press is to install multiple pairs of punches on the working turntable in a circular shape, and the tail of each upper and lower punch is controlled by a fixed lifting guide; the working turntable is driven by the transmission equipment to rotate, so that the upper and lower punches follow the It rotates synchronously, and at the same time is controlled by the guide rail to do axial lifting motion, the particles in the filling hopper are continuously added to the die; there are pressure rollers above the upper punch and under the lower punch, when they rotate to their respective pressure rollers, the material is pressed. Continuous compression into tablets and continuous tableting.

The speed of the turntable, the filling depth of the material and the thickness of the tablet can be adjusted when the rotary tablet press is pressed. The mechanical buffer device on the machine can avoid mechanical damage caused by overload. The machine is equipped with a powder suction box. The dust generated when the machine is rotated can be absorbed by the suction nozzle to avoid sticking and blockage, and the raw materials can be recycled for reuse.

The Main Structure of the Rotary Tablet Press

1. Turntable structure: The turntable is the main execution part of the machine's work. It consists of upper and lower bearing assemblies, spindle, turntable and other main parts. The main shaft is supported on the bearing, driven by a worm gear pair, connected by splines, and drives the main shaft to make the turntable rotate.

2. Track mechanism: The track has a cylindrical cam and a plane cam composed of an upper track and a lower track, which are the trajectory of the upper and lower punches. The upper rail is composed of multiple rails, such as upper punching upward rail, upper punching downward rail, upper punching upper parallel rail, upper punching lower parallel rail, and pressing down rail. They are respectively fastened to the upper rail disc. The lower track is composed of the lower rushing upward track, the lower rushing downward track and the filling track. They are respectively mounted on the lower rail seat.

3. Filling adjustment device: The filling adjustment is used to adjust the weight of the tablet. The filling adjustment mechanism is installed inside the main body, and a moon-shaped filling rail can be observed on the plane of the main body. It rises or falls by the action of the screw to control the filling amount. When the disc is adjusted, the filling amount decreases clockwise, and vice versa. increase.

4. Sheet thickness (pressure) adjustment device: adjust the sheet thickness (pressure) by adjusting the lower pressure wheel up and down. The lower pressing wheel is installed in the groove of the main body, it is sleeved on the eccentric shaft, and the outer end is connected to the hand wheel. When the external hand wheel is adjusted, the eccentric shaft drives the pressing wheel to rise and fall, that is, to adjust the thickness (pressure) of the sheet, thereby To control the thickness and hardness of the tablet, the up and down adjustment of the upper pressing wheel can also be used as an adjustment device, but it is not adjusted in general.

5. Feeding device; the device is composed of feeding hopper, adjusting screw, feeder and other parts. The feeder is a moon-shaped grid feeder, which is installed on the turntable. The gap between the feeder and the working face of the turntable and the height of the hopper are adjusted according to the fluidity of the particles.

6. Transmission device: The transmission part of the machine is composed of electric motor, synchronous pulley and worm gear reducer, test hand wheel and so on. The motor is installed on the motor base of the bottom plate. After the motor is started, the power is transmitted to the reduction worm gear pair through a pair of synchronous belts. The electric speed is regulated by AC variable frequency stepless speed regulation. Open the sides or the rear door to directly observe and access these parts.

7. Shell part: The shell of the machine is fully enclosed and meets the requirements of GMP. The upper part is surrounded by four windows for easy cleaning and maintenance. The lower part is closed by a stainless steel door, which is normally locked and closed, and is only opened for maintenance and installation of the die. A console is installed on the front of the machine. The tableting chamber and the transmission part of the machine are separated by a stainless steel enclosure, which ensures the cleaning of the tableting chamber and protects the transmission parts from powder pollution and corrosion.

Features of ZP Series Rotary Tablet Press

1. The outer cover is fully enclosed, the material is stainless steel, and the inner table is made of stainless steel, which can keep the surface gloss and prevent cross-contamination, and comply with GMP.

2 The mechanical operation can be clearly seen with the transparent protective cover. And can be fully opened for easy cleaning and maintenance.

3 The speed is stepless speed regulation, which can be adjusted arbitrarily.

4 Realize mechatronics, using touch keys and display (speed, output, fault) and other display

5. The transmission system is sealed in the oil tank under the main body of the machine. It is an independent component that is safely separated and will not contaminate each other. It also makes the transmission shaft infiltrate the oil pool, which is fully lubricated, and the noise and wear are reduced.

6. The mechanical dust collector can absorb the dust in the pressing room.

Precautions for the Use of Rotary Tablet Presses

1. Do not remove the protective cover and safety cover device on the machine.

2. The punching die needs to undergo strict flaw detection test and appearance inspection. It must be free of cracks, deformation, missing edges, suitable hardness and accurate size. If it is unqualified, do not use it to avoid serious damage to the machine.

3. The feeder device is flat with the turntable surface, and the height is accurate. If it is high, powder leakage will occur, and if it is low, copper chips will grind off and affect the quality of the tablet.

4. Do not use raw materials with a lot of fine powder, because it will cause a lot of flying powder in the upper punch and a lot of leakage material in the lower punch, which will affect the easy wear and tear of the machine parts and the loss of raw materials.

5. Do not use raw materials that are not dry, as it will cause the powder to stick to the punch face.

6. If the film jumps or stagnates during operation, it must not be taken by hand, so as to avoid hand injury accidents.

7. When starting up, the motor should be started first, and then the clutch should be started after the operation is normal.

8. If you find abnormal vibration or abnormal noise during use, you should stop and check immediately.

9. The pressure in use should not be too large. Generally, it is measured by the load of the motor. The heavy load current of 380 volts motor during tablet pressing is normal to not exceed 4 amperes.

10. The difference in tablet weight increases: in the process of adding tablets, the weight difference cannot exceed the limit specified in the Pharmacopoeia to be qualified.

The Adjustment Method of the Tablet Weight of the Rotary Tablet Press

In the process of pressing, it is often found that the difference in tablet weight increases. The reasons and treatment are as follows:

(1) The length of the punches is uneven: it is easy to increase the difference in sheet weight, so use a caliper to check each punch before use. If there is an individual decrease, it may be due to the failure of the undershoot movement, resulting in a smaller filling volume of particles than others. The individual undershoot should be checked and the obstacles should be cleared.

(2) The height of the feeding hopper is not correct: it can cause the particles in one feeding hopper to fall fast, and the particles accumulated on the feeder, and the particles in the other feeding hopper. The number of particles in the two feeding hoppers should be kept at a certain number and the falling speed should be equal, and the particles accumulated on the two feeders are similar, so that the particles can be Add evenly into the die hole.

(3) The feeding hopper or feeder is blocked: during tableting, if the particles used are small, viscous or wet, and there are occasional cotton yarn ends and foreign matter in the particles, the flow is not smooth, and the particles added to the die holes are reduced. , Affect the film weight, if the film weight suddenly decreases, stop immediately for inspection.

(4) Changes in tablet weight caused by particles: too wet particles, too much fine powder, too large difference in particle thickness and insufficient lubricant in the particles, which can also cause changes in tablet weight differences, and the quality of particles should be improved.

(5) The reason for the change of tablet weight is generally caused by the failure of the tablet press or negligence in work. Therefore, during the tablet pressing process, the maintenance work of the machine parts should be done, and the machine parts should be checked for damage in detail. Weigh the tablet every certain time (10-20 minutes), and the tablet coincides with the regulations.

Daily Maintenance of Rotary Tablet Press

1. Regularly check the parts, 1-2 times a month. The inspection items are whether the crankshaft, upper and lower rail guides and other moving parts are flexibly rotated and worn. If problems are found, they should be repaired and used in time.

2. After one use or shutdown, the remaining powder should be taken out, and the remaining powder in each part of the machine should be brushed off. If the stoppage time is long, all the dies must be removed, and the machine should be wiped clean. The smooth surface of the machine parts Coat with anti-rust oil and cover with cloth.

3. The maintenance of the die should be placed in a covered iron box, so that the die is fully immersed in oil, and it should be kept clean, so as not to rust and bruise, try to customize the iron box and pack one box of each specification. , which can avoid installation errors during use and help to grasp the damage.

4. The place of use should be cleaned frequently, especially for the manufacture of pharmaceutical and edible tablets, and there should be no lime sand and flying dust.

The whole machine of the rotary tablet press is made of stainless steel and is equipped with a full-scale motor of the national standard, which conforms to the GMP hygiene standard. This machine is a fully automatic tablet press. The thickness, pressure, and speed of tableting can be adjusted according to actual needs to realize electromechanical operation. It adopts touch keys and display screen (speed, output, fault) and other displays. The speed is No speed regulation, can be adjusted arbitrarily. It is suitable for pressing round, special-shaped and other tablets of different shapes in pharmaceutical factories, chemical factories, daily chemical factories, laboratories, etc.

The current development direction of tablet press technology is intelligent, flexible, and in line with CGMP production standards. The high-tech content of products is constantly improving, and the automation technology, numerical control technology, sensor technology, New material technology has been widely used in foreign tablet presses. In the near future, we will also gradually develop higher-tech and more intelligent tablet presses.

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