Common Problems and Solutions Of Tablet Press Machine

When tablet press have some problems, do not rush to disassemble, you should first ask the equipment operator before and after the failure, fault phenomenon and maintenance history.

Before disassembly, we should be fully familiar with the function, position, connection mode of each part and the relationship with other parts around. In the absence of structural drawings, we should disassemble while drawing a sketch and make a mark.

And, then check whether there are obvious cracks and defects in the relevant parts of the tablet press. Before disassembly, the surrounding fault factors should be eliminated first, and the fault point can be disassembled.

Otherwise, if you disassemble blindly, it may repair the equipment worse. Only after determining that the mechanical parts of the tablet press machine are fault-free, it is appropriate to carry out electrical inspection. When checking the circuit fault, the failure rate of the power supply part accounts for a high proportion in the whole fault equipment.

There, you can get twice the result with half the effort when repairing the power supply first.

Do not rush to replace the damaged electrical parts. Consider replacing the damaged electrical parts only after confirming that the peripheral circuit is normal.

After confirming that there is no bad contact problems, it is necessary to check the operation relationship between the line and the machinery to avoid misjudgment.

When the equipment is not started, you need to manually turn the car and power point, see the motion state of each mechanism, listen to the running sound of the tablet press machine, measure the parameters of each measuring point, judge the fault point, and finally carry out maintenance.

Common problems and solutions of tablet press machine

In the practice of debugging and maintenance of tablet press machine, there are three main reasons for the problems: material, electrical and mechanical aspects, and most of the electrical problems in addition to the device itself, most of the mechanical problems are caused by, so the daily maintenance of equipment is particularly important.

Loose pieces-- the hardness of its finger tablet is small, hemp hole and easy to crack under light pressure.

The cause of the problems: the amount of adhesive or lubricant is small or inappropriate, so that the distribution of particles is uneven, coarse and fine particles are stratified, and the pressure can not be overcome even when the pressure is increased.

Solution: choose appropriate adhesive or increase the dosage, improve the granulation process, mixing particles, etc.

The cause of the problems:the fineness of the drug is not enough, the content of the fibrous, elastic drug or oil component is more and the mixture is not uniform.

Solution: The drug can be crushed more small, choose a strong adhesive, increase the pressure of the tablet press, add oil drug absorbent and fully mixed.

The cause of the problems: Water content is not suitable, too little water or dry particles elastic, because the drug containing water of crystal in particle drying lost more water of crystal, easy to become brittle, loose crack, but too much hardness becomes smaller.

Solution: The granulation process should be controlled according to different varieties of water content. If the particles are too dry, an appropriate amount of dilute ethanol (50% ~ 60%) can be sprayed, mixed and pressed.

The cause of the problems: The physical properties of the drug itself. It is determined by brittleness, plasticity, elasticity and hardness. For example, elastic material becomes smaller when pressed and expands due to elasticity after decompression, so the tablet cracks loosely.

Solution: Different drugs need different pressure when pressing tablets and add other auxiliary materials to control.

The cause of problems: mechanical factors. Such as the length of the punch is not uniform, or the pressure adjustment is not appropriate, the speed is too fast or the particle in the hopper is more or less.

Solution: adjust the pressure, replace the punch, adjust the speed and the speed of the feeder.

Lobes

When the tablet is split from the waist due to vibration or placement, it is called lobes; Those that split apically are called apical clefts and are always called lobes.

The judgment method is as follows: take several pieces and shake them gently in a vial, and then drop them on the marble floor from the height of Im, or take 20 ~ 30 pieces and put them in the palm of your hand, with both hands together, and shake them vigorously for several times to check whether there are lobes.

The cause of problems: the drug itself has more fiber or oil components.

Solution:Sugar can be added to reduce fiber elasticity, strengthen adhesion or increase the absorption of oil drugs, fully mixed after pressing tablets.

The cause of problems: the amount of adhesive and lubricant is not enough, and the adhesive force in the particle is not enough.

Solution: with good viscosity of the particles mixed with the tablet, or in the content does not affect the screen to remove part of the fine powder.

The cause of problems: the tablets are compressed for a short time, and part of the air in the powder can not escape in time and is compressed in the tablets. When the pressure is relieved, the air inside the tablets expands and causes lobes.

Solution: adjust the pressure and slow down the car properly, can screen out part of the fine powder, reduce the amount of lubricant.

The cause of problems:Pressure chamber temperature is low, easy to cause lobes, especially poor viscosity drugs are easy to produce.

Solution: Adjust the air conditioning system to control the temperature.

The cause of problems: After using the die for a period of time, the die gradually wears out, so that the upper punch does not match the die ring, and the punch rolls inward, the pressure is not uniform, so that the tablet part is too much pressure and causes the top crack.

When the die ring is used for a long time, the middle of the die hole is enlarged due to friction, so that the middle diameter is larger than the mouth diameter, so that the tablet will split when it is pushed out.

Solution: Replace the die ring.

In fact, the problems of the tablet press machine is far more than these, this is what you can not decide, because each machine has its own life, but you can minimize the failure rate of the machine by good maintenance of the machine, increase the use time of the machine, to ensure the normal production efficiency of the machine.