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The source and working steps of the combination scale

  • 2022-07-12
The source of the combination scale:

In the 1970s, the Japan Agricultural Association proposed the topic of weighing green peppers to relevant weighing instrument companies. In Japan, green peppers are usually sold in bags in quantitative packaging. If the quantitative value of each bag of green peppers is 120 grams, it is very difficult to accurately package 120 grams. Since the weight of a single green pepper is heavier and the difference is large, less weight is related to the consumer's benefit, and greater weight is related to the cost of the business. The traditional method is manual weighing, that is, adding 115 grams when one green pepper by another green pepper is added to the static electronic scale, it is almost impossible to find 5 grams of green peppers to add. You have to take a smaller bell pepper from 115g and add another larger bell pepper. If the weight is much more than 120 grams or less than 120 grams, the above work needs to be repeated, so the weighing efficiency is extremely low, and it is difficult to achieve a result (quantitative value) close to the target weight. After a lot of investigation and research on this by the technicians, they used a combination scale to successfully solve the above green pepper weighing problem. Some large food companies even use it as a designated device.


The working steps of the combination scale:
1. The material is sent to the hopper by the material conveyor. When the material is added to the pre-set horizontal position, the electronic eye on the side of the hopper detects and sends a signal to stop the feeding of the conveyor until the horizontal position of the material on the hopper drops. When the preset level is reached, the electronic eye sends out the feed signal again;
2. The material is located in the storage hopper. Through the vibration of the main vibrating machine, the material will fall evenly into the wire vibrating plates from the main vibrating plate, and feed each wire vibrating plate;
3. The vibration of the wire vibrating machine makes the material discharge from each wire vibrating plate and enter the hopper for storage;
4. When the weighing hopper completes the last weighing and emptying, open the upper hopper, let the material enter the combination scale for weighing, and the output signal transmits the data to the main board of the control device through the lead wire, and the CPU on the main board reads And record the weight of each weigh bucket, analyze, and combine to select the combination of weigh buckets closest to the target weight.
5. When there is an allowable discharge signal, the CPU sends a command to the start driver to open the selected weighing hopper, send the material through the chute or directly into the packaging machine to the collection hopper, and send the discharge signal to the packaging machine to Complete the packaging.


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