The difference between computer combination scale and traditional quantitative packaging scale

Since the birth of the world's first computer combination scale in the 1970s, it has created a new era in the world of weighing instruments. Due to its high speed, high-precision weighing and high degree of automation, it has been widely used in roasted and roasted foods and chips. Quantitative packaging for industries such as candy, puffed food, biscuits, and frozen vegetables. The quantitative weighing of the roasted seeds and nuts foods can best reflect the revolutionary and superiority of the computer combination scale in the field of weighing instruments, and it solves the problem of large measurement error caused by the small weight of the single piece.

Roasted food is a packaged food made from fruits, vegetables, seeds, nuts, nuts and other main raw materials, with or without added auxiliary materials, fried, baked (including steamed and cooked), fried, etc., including: roasting And fried. Faced with many roasted seeds and nuts production enterprises, nearly half of the domestic units are still in the level of manual packaging. The accuracy of packaging measurement is unstable, and human factors are large. Some of the enterprises have old packaging equipment, backward technology and poor measurement repeatability. Taking a domestic roasted seeds and nuts food factory in Zhejiang Province, this is a company specializing in the production of all kinds of roasted seeds and nuts. It has been using traditional measuring methods (traditional quantitative automatic packaging scale) for a year ago, its speed can only reach 25 times / minute, single bag The weighing average error value is greater than 4g, that is, each bag (50g) is packaged with at least 4g error due to inaccurate weighing. Based on the annual output of 4,000 tons, the company will lose nearly 400 tons of roasted seeds and nuts every year. The performance of computer combination scales in packaging accuracy and speed is much higher than the traditional measurement methods. At present, the weighing error of multi-head scales is generally 0.1-1.0g in the industry; the weighing range is 0-1500g; a 10-head computer combination weigher from Hangzhou Zhongheng Packaging Machinery Co., Ltd. () For example, the weighing speed can reach 70 times/min, 14 computer combination scales, and the weighing speed can reach 130 times/min. In order to solve the problem of inaccurate product measurement, the company tentatively purchased a computer combination weigher (ZH) -A10). Using the computer combination scale, the enterprise sets the actual weighing error value to about 0-1.0g, and the average error is 0.3-0.6g, that is, the weighing error loss per bag of roasted seeds and nuts (40g) is reduced by 3 when using manual weighing. Above gram, it has been confirmed by cost accounting that the computer combination scale has recovered all the investment in less than half a year. Now the company has used all the factories in the country.

There are the following differences between computer combination scales and traditional quantitative automatic packaging scales:

1. The weighing principle of the computer combination scale and the traditional quantitative automatic packaging scale is different. The traditional quantitative automatic packaging scale is weighed while feeding, and continues to feed before reaching the target weight data. When it is slightly different from the target weight, it must be added. After the coarse measurement, the fine measurement is performed. If the individual is larger or heavier, there is a large error, which is the accuracy of the weighing. The computer combination weigher is composed of a plurality of weighing units with independent feeding and discharging structures, and the general computer combination weighing scale is composed of 8 to 32 weighing units. The computer uses the arrangement and combination principle to automatically calculate the load of each weighing unit automatically, and obtains the combination of the best and closest quantitative values ​​for packaging. For example, a 10-head computer combination weigher from Hangzhou Zhongheng Packaging Machinery Co., Ltd. (), for example, weighs each weighing unit and weighs the weight data of each weighing hopper. Into the computer, the computer is optimally combined. According to the mathematical combination principle and computer technology, 10 weighing units can achieve a total of 1023 combinations, and the computer selects the combination closest to the target weight value from the 1023 combinations. In this way, the above-mentioned manual repeated matching and it is difficult to achieve quantitative values ​​can be solved. The computer combination weigher automatically weighs according to the set weight and automatically selects the combination closest to the target weight.

2. The reliability of the data of the computer combination scale and the traditional quantitative automatic packaging scale is different. Because the traditional quantitative automatic packaging scale is weighed while feeding, it is weighed in the dynamic condition for the sensor, if the object is shocked or beaten. The sensor will induce unstable weight data and cause errors, and the vibration supply of the computer combination weigher is carried out on the storage hopper. The weighing of the weighing hopper is carried out under stable conditions, so the obtained weight data is accurate. Higher degrees.

3. The difference between the computer combination scale and the traditional quantitative automatic packaging scale This error is a very significant error for the quantitative automatic packaging scale. When the weight value in the weighing hopper reaches the set value, although the electromagnetic vibration feeder has stopped But at the moment of stopping, the existence of a scaled object weighing the bucket to the vibrator will eventually fall into the bucket and produce a so-called drop error, although some quantitative automatic packaging scales use shortened feed time to reduce the drop error, but Due to system uncertainties such as flow rate and feed uniformity, there are still different degrees of error. The computer combination weigher is fed from the buffer hopper to the weighing hopper. After the weighing hopper is completely stabilized, the command is issued for weighing, so there is no drop error.

4. The difference between the speed of weighing the computer combination scale and the traditional quantitative automatic packaging scale. The traditional quantitative automatic packaging scale generally has to undergo the weighing process of coarse metering and fine metering. In particular, the process of fine metering needs to be added a little bit. Longer time, affecting the weighing speed. For example, the quantitative automatic packaging scale below 1 kg generally has a weighing speed of 20 to 30 packs/min, while the computer combination weigher can generally achieve a weighing scale of 14 weighing units of 100 to 120 packs per minute in a computer's fast preferred combination calculation. It is 4 to 6 times faster than the quantitative automatic packaging scale, and it is easy to match with various packaging machines. It greatly improves the packaging efficiency and is more suitable for the needs of modern production management.

5. When the difference between the computerized scale and the traditional quantitative automatic packaging scale is the same, the weighing range of the computer combination scale is larger than that of the traditional quantitative automatic packaging scale. Under normal circumstances, the traditional quantitative automatic packaging scale is the same. The weighing range under accuracy is controlled within 4 times, while the computerized combination scale can be scaled up to a dozen times in the small weighing section. It can also be seen from a large number of test results that there is a difference in the range of weighing. For example, in the range of weighing from a few grams to 1 kilogram, the computer combination scale can meet the accuracy level of X (1) level, especially in the small weighing section. If you want to keep the accuracy level unchanged, the traditional quantitative automatic packaging scale only reduces the weighing range, forming a multi-stage weighing, can only rely on the production of multiple series of products, in order to achieve a certain aspect of the manufacturer's requirements. The average manufacturer will almost never accept this phenomenon. This has brought limitations to its practical application, and it does not meet the requirements of different packaging specifications (10-1000g) in some production areas but requires similar precision. The above is the advantage of the computer combination scale. Another important feature of the computer combination scale is that it has corresponding application technology according to different materials, such as waterproof type, fragile type, easy stick type, mixed weighing, number Weighing, etc., can be applied to all aspects of the needs. In the past, China relied on imports from Japan, Australia and other countries. Due to the high price, it has hindered the widespread application and popularization of computer combination scales. The intelligent combination scale produced by Hangzhou Zhongheng Packaging Machinery Co., Ltd. () has been introduced to the market so far. It is widely used in packaging snack foods and candy because of its fast weighing rate, high pass rate and good automation. Quantitative packaging for industries such as baked foods, puffed foods, and frozen foods. It is favored and respected by the vertical (to bag) packaging machine industry, trade industry and food production industry at home and abroad.