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What are the differences between multi-head combination scales and automatic packaging scales?
With more and more frequent use of multi-head combination scales and automatic packaging scales, our multi-head combination scales have been favored by users. Today, Shanghai Heng Gang Xiaobian came to tell you about the difference between multi-head combination scale and automatic packaging scale. Friends who are not very familiar with this issue can read this article carefully and hope to help you.
There are the following differences between multi-head combination scales and automatic packaging scales:
1, different weighing principle
The automatic packaging scales are weighed on one side while feeding, and continue to feed until reaching the target weight data. When there is a little difference between the target weight and the target weight, one additional object must be added, ie, after the rough measurement, the precision measurement is performed. For example, the individual object is larger. Or when there is a heavier weight, there is a large error, which affects the accuracy of the weighing scale. The multi-head combination weigher is composed of a plurality of weighing units with separate feed and discharge structures. The general multi-head combination weigher is composed of 8 to 32 weighing units. The computer uses the permutation and combination principle to automatically calculate the load of each weighing unit, and obtains the combination closest to the quantitative value for packaging. For example, a 10-head multi-head combination weigher from Shanghai Henggang Instrument Co., Ltd. is taken as an example. Each weighing unit is weighed when weighing, and the weight data of each weighing hopper is read into a computer and optimized by a computer. According to the mathematical combination principle and computer technology, ten weighing units can achieve a total of 1023 combinations. The computer selects the combination of the 1023 kinds of combinations that is closest to the target weight value. In this way, the above-mentioned man-made repetitions and the difficulty in realizing quantitative values ​​can be solved. Multi-head combination weigher automatically weighs according to the set weight, and automatically selects the combination closest to the target weight.
2. Different reliability
Since the automatic packaging weigher is weighed while feeding, the sensor is weighed under dynamic conditions. If the weighed object is subjected to impact or pulsation, the sensor will induce unstable weight data and cause errors, while the multi-head combination weigher The vibration feed is performed on the storage hopper, and the weighing hopper is weighed in a stable condition, so the accuracy of the obtained weight data is higher.
3. Different drop error
This kind of error is a very significant error for the automatic packaging scale. When the weight value in the weighing bucket reaches the set value, although the electromagnetic vibration feeder has stopped, the moment it stops, a section of the weighing bucket to the vibrator is stopped. The existence of the called object will eventually fall into the bucket and cause a so-called drop error. Although some automated packaging weighers use the shortened feeding time to reduce the drop error, they are affected by system uncertainties such as the flow velocity and the feed uniformity. There are still varying degrees of error. The multi-head combination weigher is supplied by the buffer hopper to the weighing hopper. After the weighing hopper is fully stabilized, an instruction is issued to request weighing. Therefore, there is no drop error.
4. Weighing speed is different
Automatic packaging scales generally undergo a rough weighing and precision metering process. In particular, the precision metering process requires a little bit of additional time, which takes a long time and affects the weighing speed. For example, automatic weighing scales weighing less than 1 kg generally have a weighing rate of 20 to 30 packs/minute, and a multi-head combo weigher generally has 14 weighing units weighing up to 100 to 120 packs/minute in a computer's rapid optimization combination calculation. It is 4 to 6 times faster than automatic packing scales, and it is easy to match with various packing machines. Greatly improve the packaging efficiency, more suitable for modern production management needs.
5. Different weighing ranges
When the accuracy is the same, the weighing range of the multi-head combination weigher is larger than that of the automatic packaging weigher. Generally, the weighing range of the automatic packaging weigher under the same accuracy is controlled within 4 times, and the multi-head combination weigher is in the small weighing section. Weighing range up to ten times. From a large number of test results, it can also be seen that there are differences in the scale of the two scales. For example, in the weighing range of several tens of grams to one kilogram, a multi-head combination weigher can meet the requirements of the X(1) level of accuracy, especially in the small weighing range. If you want to maintain the same level of accuracy, automatic packaging scales only reduce the scale range, the formation of multi-section weighing, can only rely on the production of more than one series of products in order to achieve the requirements of a certain manufacturer. The average manufacturer will hardly accept this phenomenon. This brings limitations to its practical application, which cannot meet the requirements for the use of different packaging specifications (10-1000g) in some production areas but require similar accuracy. The above is the advantage of multi-head combination weigher. Another important feature of multi-head combination weigher is that there are corresponding application technologies according to different materials, such as waterproof type, fragile type, easy-to-stick type, mixed weighing, number of Weighing and so on can be applied to various needs. In the past, our country relied on Japan, Australia, and other countries for import. Because of its high price, it has hindered the wide application and popularization of multi-headed combination weighers.
This article is shared by Shanghai Henggang Instruments Co., Ltd. If you want to learn more about the multi-head combination scale, you can inquire! Thank you for your support!