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    Home > Active Ingredient News > Drugs Articles > Precautions for rotary tablet press

    Precautions for rotary tablet press

    • Last Update: 2014-09-09
    • Source: Internet
    • Author: User
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    Precautions for use of rotary tablet press: 1 Do not remove the protective cover and safety cover on the machine and equipment, and install them properly during use 2 The die shall be subject to strict flaw detection test and appearance inspection, and shall be free of cracks, deformation, edge missing, proper hardness and accurate size If it is unqualified, it shall not be used, so as to avoid serious damage to the machine 3 The feeder device is level with the turntable surface, with high and low accuracy If it is high, powder leakage will occur, and if it is low, copper scraps will be abraded to affect the tablet quality 4 Do not use the raw materials with more fine powder, because it will cause more flying powder in the upper flushing and more material leakage in the lower flushing, which will affect the wear of parts and the loss of raw materials 5 Do not use raw materials that are not dry, because it will make the powder stick on the punch surface 6 If there is any jumping piece or stagnation during operation, it shall not be taken by hand to avoid hand injury 7 Start the motor first, and then start the clutch after the motor operates normally 8 In case of abnormal vibration or abnormal noise during use, stop the vehicle for inspection immediately 9 The pressure in use should not be too large, generally measured by the load of the motor, and the heavy load current of 380 V motor when pressing the tablet should not exceed 4 A as normal 10 Increase of tablet weight difference: in the process of adding tablets, the weight difference shall not exceed the limit specified in the Pharmacopoeia, then it is qualified Adjustment method of tablet weight of rotary tablet press: in the process of pressing, it is often found that the difference of tablet weight increases The causes and treatment are as follows: (1) the length of punch is uneven: it is easy to cause the difference of tablet weight to increase, so use a caliper to check each punch before use In case of individual reduction, due to the failure of downwash movement, the filling amount of particles is less than that of others It is necessary to check individual downwash and remove obstacles
    (2) if the height device of the hopper is not correct, the particles in one hopper will fall faster, while the particles on the feeder are more, and the particles in the other hopper are slower, while the particles on the feeder are less, resulting in the imbalance when the particles are added into the mold hole The position of the hopper can be adjusted so that the particles in the two hopper should be kept in a certain amount and fall At the same speed, the particles on the two feeders are similar, and the particles can be evenly added into the mold hole (3) filling hopper or feeder blocking: in tablet pressing, if the used particles are small, sticky or wet, and occasionally foreign matters of cotton yarn head and tablet are mixed in the particles, the flow is not smooth, so that the particles added into the mould hole reduce and affect the tablet weight If the tablet weight suddenly decreases, stop the machine immediately for inspection (4) change of sheet weight caused by particles: too wet particles, too much fine powder, too large difference of particle size and insufficient lubricant in particles can also cause change of sheet weight difference, so the quality of particles should be improved (5) the reason for the change of sheet weight is generally caused by the failure of the tablet press or negligence in work Therefore, during the process of tablet pressing, the maintenance of the machine parts should be done well, the damage of the machine parts should be checked in detail, and the sheet weight should be weighed once every certain time (10-20 minutes), and the sheets should be overlapped with the regulations.
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