Quantitative packaging scale is more and more widely used in production lines

The quantitative packaging technology has been widely developed and applied, and the quantitative packaging scale is more and more widely used in the production line. The quantitative packaging scale is an automatic weighing device that works according to the set program and automatically packs a large number of bulk materials. Automatic quantitative packaging scale is mainly used for automatic quantitative packaging in industrial and agricultural automation production. The whole weighing process is automatically controlled by the computer. It has the advantages of high weighing accuracy, labor saving, convenient maintenance and simple operation. In this age of precious time, it is very important to be more productive at work. However, it is almost impossible for packaging scales to combine dosing speed and dosing accuracy at the same time. Therefore, it is very difficult to improve the accuracy and efficiency, which may come at the cost of some additional cost. Therefore, this paper mainly discusses how to improve the working efficiency of the quantitative packaging scale on the basis of ensuring the accuracy of the quantitative packaging scale.

The analysis starts from the working process, which roughly includes maximizing the material in a short period of time during the front-end feeding process, thereby shortening the weighing cycle and improving the working efficiency of the quantitative packaging scale; compared with the previous stage, then one-stage feeding For a long time, only 5% - 10% of the rated amount is added, thus ensuring the accuracy of the packaging scale. Analysis by increasing the speed of work. In the process of feeding the front stage, the flow rate should be as large as possible, so that the closer the feed value is to the rated value, the better; from the perspective of improving accuracy, the smaller the flow rate of the final stage feed, the better the accuracy. However, in actual operation, the difference from the above situation is that at the end of the feeding process of the previous stage, the impact force brought by the material will produce oscillating ripples on the scale, which will cause a certain degree of damage to the scale; When it is large, the impact force increases and the oscillation peak value increases. In addition, if the feed value set in the previous stage is closer to the feed value set in the last stage, the peak value of shock oscillation will increase, resulting in exceeding the feed value set in the last stage, resulting in the last stage. closure. However, the actual weight value does not exceed the input value set in the previous stage, and the error is large. Therefore, in order to avoid big mistakes, some traditional methods, such as reducing the previous stage of feeding or adding another stage to reduce the impact force, then, the material brought by the peak impact force will not exceed the feeding value, thus maintaining the equipment, Guarantee the accuracy of the work. Although the accuracy of packaging is guaranteed in terms of work accuracy, in terms of work efficiency, whether increasing the feeding time of the previous stage or increasing the feeding time of the previous stage will reduce the work efficiency of the packaging scale.

In order to improve the accuracy and stability of the quantitative packaging scale, many automatic control theories are added to the automatic weighing controller, which has automatic functions such as zero abnormal automatic alarm, out-of-tolerance automatic alarm, zero tracking and automatic zero drop correction. The above functions have one thing in common, that is, the weight-related data is used as the measurement basis. There are mainly two monitoring data, one is the empty range value detected after unloading, and the other is the full range value detected after charging. On the basis of this dynamic work, it is difficult for the staff to accurately measure the values of these two points. To this end, the traditional method is to first detect the zero value before the feeding operation, and then detect the full scale value after the feeding operation is completed, and then use it as the data basis for automatic control in turn. However, the scale of quantitative packaging is different. This is a dynamic operation process. Relatively speaking, some weight-related data information changes from dynamic to static. Therefore, the detection work needs to be carried out in a relatively stable time. If the weight related data is found every time, the scale must be in a steady state, and then the static weight data is detected, which will prolong the work cycle time and reduce the work efficiency, so it is impossible to ensure accuracy and improve efficiency at the same time. It is worth noting that the value to be measured must be set correctly to ensure that the small material gate can meet the required weight after one time closing. Otherwise, after the small material door is closed once, if the weight is lower than the requirement, the small material door must be re-opened to replenish the material, resulting in an over-tolerance. In addition, if the parameter changes are inappropriate and unreasonable, the feeding of small material gates will also occur. Therefore, its parameters must be adjusted before operation to ensure the accuracy of weighing and avoid out-of-tolerance. Only when the accuracy is guaranteed, can we talk about ways to improve the speed of work.