Material weighing device and method

Abstract

The invention discloses a material weighing device. The material weighing device comprises a rack. A hopper, a weighing hopper, a feeding mechanism and a feeding bin are arranged on the rack. A discharging mechanism is arranged in the weighing hopper and comprises taking-out hoppers and a discharging mechanism body. The multiple taking-out hoppers are different in size and are arranged on tracks with which materials on the feeding mechanism fall on the weighing hopper. The discharging mechanism body controls the materials in the taking-out hoppers to fall into the weighing hopper. According to the material weighing device and a material weighing method, a taking-out method is adopted, and the accurate materials are finally discharged; when the whole device runs, as a low-speed feeding link is removed, the weighing time is greatly saved, and the packaging efficiency is improved; although a discharging device is designed and a part of cost is increased, the material weighing accuracy is greatly improved, the automation degree is high, the indexes of the whole industry are increased, and the large market value is achieved.

Description

technical field [0001] The invention relates to the field of packaging machinery, and more specifically relates to a material weighing device and a weighing method. Background technique [0002] At present, the weighing method in the chemical industry, feed, and food industry is realized by quantitative packaging scales. When the quantitative packaging scale enters the automatic operation state, the weighing control system opens the feeding door to start feeding. The feeding is divided into two types: fast feeding and slow feeding. First, after the fast feeding reaches a set value, the fast feeding will stop. The feeding begins to feed at a slow speed. When the weight of the material reaches the final target value, close the feeding door to complete the weighing process. The following is a detailed description of an embodiment. Take weighing 25KG of material as an example, refer to the attached Figure 5 . [0003] First, make the weight of the material reach 24.5KG throu...

AI Technical Summary

Problems solved by technology

During the period from when the signal is sent to the stop of the feeding system, materials will flow into the weighing hopper one after another. Secondly, the load cell only measures the weight of the material falling into the hopper, because it is continuous feeding. The material in the hopper is the target at the moment of stop. However, some of the suspended materials have been sent out of the feeding system but have not reached the inside of the scale (in a suspended state), these materials will eventually fall into the weighing hopper, so the final weighing will be biased and the accuracy will be affected

[0005] In addition, due to the slow feeding speed of the traditional weighing method is very low, so the feeding time is too long, resulting in waste of time and affecting the efficiency of the entire packaging

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