The multi-head computer combination scale originated in Japan at the earliest. Because the multi-head scale has good performance in terms of accuracy and speed, it has been rapidly and widely used in the food industry. Multi-head scales can weigh three types of materials: block, granular and strip. Among them, the weighing of block materials can best reflect the advantages of multi-head scales. It solves the measurement of block materials due to the large weight of each block big error problem.

The performance of the multi-head computer combination scale in terms of packaging accuracy and speed is greatly improved compared with the traditional measurement method. At present, the weighing error of the multi-head scale is generally set as a positive deviation of 0.5-1.0g (weighing range 500g) in the industry. At the same time, because the multi-head scale adopts the computer for calculation, it effectively improves the combination speed (that is, the weighing speed). A multi-head scale with ten heads can weigh up to 70 times/min, and a multi-head scale with 14 heads has a weighing speed of 70 times per minute. Up to 120 times/min. Fujian Dali Food Factory is a large-scale enterprise specializing in the production of fried potato chips. Before 2004, the traditional measurement method (single weighing cup measurement) was used, and its speed could only reach 25 times per minute. The average error of single bag weighing The value is greater than 4g, that is, each bag of potato chips (40g) is packed with at least 4g of potato chips due to inaccurate weighing. Calculated based on the annual output of 4,000 tons, the company lost nearly 400 tons of potato chips per year alone. In order to solve the problem of inaccurate product measurement, the company tried to buy a multi-head scale (wp-a10). After using the multi-head scale, the company sets the actual weighing error value to 1g, that is, the weighing error loss of each bag of potato chips (40s) is reduced by more than 3 grams compared to when the multi-head scale is not used. The entire investment will be recovered in half a year. At present, Fujian Dali Group, including nearly 10 branches across the country, uses more than 40 domestic combination scales.

The quantitative weighing section of the combination scale is the key equipment for the automated production of food factories. In the past, my country relied on imports from Japan, Australia and other countries. Due to the high price, the wide application and popularization of the computer combination scale was hindered. The production of our combination scale and the high-grade technology of the combination scale make the computer combination scale, which was originally regarded as a "noble product", no longer the patent of large enterprises, and more domestic enterprises that pursue high speed and high efficiency, They have eliminated the quantitative weighing and packaging production lines that cost materials and labor in the past, such as container-type or all-manual, and armed themselves with high-tech, higher-automation combination scale quantitative weighing and packaging systems.

If domestic food companies want to know more about multi-head scales, they must introduce three factors that should be paid attention to when purchasing multi-head scales.

The first thing to consider when purchasing a multi-head scale is whether the weighing speed of the multi-head scale matches the production line. The general combination scale quantitative weighing packaging system is mainly composed of a combination scale, a vertical packaging machine, a vibrating feeder, a z-type conveyor, and a supporting platform. The weighing speed of the multi-head scale mainly depends on the number of participating weighing buckets. The more weighing buckets, the faster the weighing speed. If the user already has a ready-made packaging machine, the speed of the multi-head scale should refer to the running speed of the packaging machine, but the speed of the multi-head scale should be slightly higher than that of the packaging machine speed.

Secondly, the weighing range, material size, shape, viscosity and other characteristics of the product should be considered. If the weighing range and the material are large, the combination scale with more heads such as 14 should be considered; if the material is viscous, it will come into contact with the material. The feeding hopper and weighing hopper should have anti-stick properties. Generally, the concave and convex scale hopper will be selected, otherwise the speed and accuracy of the multi-head scale will be affected.

The third factor is the weighing accuracy of the multihead scale. Although multihead scales are well established products, the accuracy of the load cells used in these measurements is not the same. Some multi-head scales are analog signals. At present, the analog signals are basically pirated scales. The scales mainly have problems such as unstable performance, easy-to-burn motherboards, and second-hand sources of IC patches. The biggest problem is that there is a problem with the product. Basically No ability to improve. Some are digital weighing, such as Jingwei, which mainly produces waterproof combination scales, all of which use digital high-precision weighing signals, which are the perfect combination of precision and speed.

The multi-head scale basically does not require maintenance during use, and only needs to be cleaned daily. In addition, food companies should pay special attention to two points in the process of using multi-head scales: first, to maintain the continuity, stability and rationality of feeding as much as possible. Too much or too little material will make the combination of multi-head scales difficult or impossible, thereby reducing the speed and accuracy of weighing; second, the weighing bucket should be disassembled as lightly as possible, and excessive force will make the load cell Damaged to affect the weighing accuracy or even unusable. Third, after daily use, the main vibrating disc, line vibrating disc, feeding hopper, weighing bucket and other places that are only in direct contact with the test should be cleaned. Before each use, check whether there are foreign objects on the hooks of each weighing bucket. , and remove the dust on each weighing bucket hook after use.