The pressure sensor is a widely used sensor. The application of pressure sensor in medical, marine, machine tool, aviation, electric power and other industries is very important. With the development of technology, the application of pressure sensors on the tablet press is more and more extensive. Everyone knows what the effect of the pressure sensor on the tablet press is. Let's introduce it to everyone. The single punching machine mainly drives the up and down punching by the rotation of the rotating wheel, and presses the particles filled into the die hole by the powder adding device into a piece. The main drawback is that the impact noise is large when the tablet is pressed (produced by the one-way pressurization of the upper punch), and the output is small (about 100 sheets/min), which is only suitable for production in small batches and trial production in the laboratory. The multi-punch rotary tablet press is a tablet press widely used in production. The automatic high-speed rotary PLC tablet press detects the punch pressure through the pressure sensor, and is monitored and analyzed by the central control unit CPU. The filling depth of the tablet press is adjusted according to the predetermined control model to realize the automatic production of the tablet press. control. The pressure sensor will drift after being used for a period of time in the tablet press, and the calibration instrument is required to verify the sensor. (That is, a comparison test to see if the difference between the actual and theoretical values ​​of the pressure sensor is within an acceptable range.) For example, calibrate a 0~1 MPa output with a 4-20 mA output. Input 0pa, 200kpa, 400kpa, 600kpa, 1MPa, and measure the corresponding output current value. Then calculate whether the output current value and the theoretical 4~20mA deviation are within the range. If it is out of range, the pressure sensor cannot be used any more and needs to be calibrated or replaced. Within the scope, you can continue to use it. It is mainly whether the calibration deviation is within the accuracy range, whether the overall linearity changes, whether the zero point is offset or the like. At the same time, it monitors the damage of the tablet press and the supply of the powder, which plays a safety protection role, greatly improves the pass rate of the tablets, reduces the production cost, and realizes one-man multi-machine management. The system is simple in operation, convenient in maintenance, stable and reliable in operation, high in control precision, and has high technical advantages. The fully automatic high-speed rotary PLC tablet press adopts a mechatronic servo control system. Servo motor is the power source, the output torque and speed accuracy are high, the spindle speed is up to 100r/min, and the Zui high-voltage piece can reach 168KT/H. With the size and shape of the die, it can be pressed out of the large diameter of 13mm. Sheet, zui large-length 16mm shaped piece, average piece weight control accuracy ± 1%, individual piece weight difference.
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