Combination said since the 1970 s, in food, medicine, chemical and other industries has been widely used, it can solve the problem of measuring packaging inhomogeneous materials, has high measuring accuracy, fast packaging, high reliability, etc, especially for some value higher particle or block can realize rapid and accurate quantitative packaging products, precision can be controlled in the plus or minus 1.
5 grams, weighing speed up to 240 bags/min.
Due to import combination according to the price is more expensive, make its application is restricted.
Combination said is fabricated by using the theory of combination weighing a industrial JiLiangCheng measuring speed, high accuracy.
Combination according to the measurement accuracy and speed of calculation model and composition, the mechanical structure, control system and other factors, the combination of calculation model is extremely important a factor, the establishment of the appropriate combination of calculation model and combination according to feeding device each loading weight distribution has a direct relationship.
Due to the combination of said materials weighing is a big part of liquidity is very poor, so choose is considered as the feeding device of the electromagnetic vibration feeder.
The purpose of this paper is to analyze the performance of the electromagnetic vibration feeder, and on the basis of establishing digital control method, for the portfolio balance the combination of high precision and high speed calculation model is set up.
Combination, said the combination of the manufacturer, at work to complete the 70 bags/min (
1 package/s)
More than ability, that is, at least to finish weight inspection in 1 s clock, combination calculation, to find a better combination, etc. , so as to complete a packing, which combined calculation time consuming more, a high-performance MCU or PLC, can be directly complete detection, calculation and control output, both can satisfy the requirement of the combination according to real-time control precision, and can satisfy the requirement of the packing speed, is a more effective way of control.
Control system is working, by MCU or PLC signals to multi-channel switch, time-sharing choose 10 weighing sensor, signal amplifying, A/D conversion, the input to the MCU or PLC, in ten combinations of input values, and get A better combination of A set of weighing hopper number, according to the number corresponding to the stepper motor control the speed and direction, make the group is expected to open the door, complete discharge, then close the door;
Storage hopper in the material level detection by photoelectric detection switch.
In addition, the system also designed the display, alarm and keyboard circuit, and make the system more complete.
The influencing factors on the quality of the electromagnetic vibration feeder feeding mainly include: the vibration of the Angle of the electromagnetic vibration feeder, the RMS and frequency of the excitation voltage, etc. , material thickness, charging time and so on, the greater the thickness, feed, the longer the greater the quality of material at a time.
In combination, the same as each hopper material quality is not too big, so the material thickness under the condition of meet the requirements should be smaller.
Also because combination according to have multiple electromagnetic vibrating feeder loading at the same time, there will be a certain interference between each other, the impact is heavy.
At work, strengthen the isolation measures are very important.
