The working principle and application of weight sorting machine

Weight sorting machine is also known as: automatic checkweigher machine, weight sorting scale, weight sorting machine. The sorting machine is a medium-low speed, high-precision online checkweighing equipment, which can be integrated with various packaging production lines and conveying systems. Online check-weighing has gradually become an indispensable link in modern industrial production, especially in the production process of food and pharmaceutical industries. The weight sorting machine completes the measurement of the weight of the product during the conveying process of the product, and compares the measured weight with the preset range. Products are distributed to designated areas. The weight sorting machine usually consists of a conveying mechanism, a sorting mechanism and a weighing mechanism. The weighing mechanism completes the collection of the weight signal, and sends the weight signal to the control box for processing. The conveying mechanism mainly ensures sufficient spacing between products by increasing the speed. The sorting mechanism is used to reject the unqualified products that have completed the inspection. The working process of the weight sorting machine is as follows: Weighing process 1. Front-end conveying mechanism: The object to be measured is transferred to the weighing mechanism, on the one hand, the object is given an initial speed, so that it can reach stability faster after entering the weighing mechanism; On the one hand, it plays the role of isolating and damping the front-end material to ensure the measurement accuracy. 2. Intermediate weighing mechanism: This part is the most critical part of the entire mechanical system, and its structural design and installation accuracy directly affect the measurement accuracy of the system. It consists of conveying motor, photoelectric monitoring part and load cell. Complete the dynamic weighing of the object. 3. Back-end sorting mechanism: This part is the action part of sorting, which is composed of conveying part, pneumatic valve, hopper, etc. Complete the rejection and sorting of unqualified parts of objects. Rejection methods can be set to blow, push rod, lever, drop and other methods. Report feedback The weight sorting machine has the function of weight signal feedback. Usually, the average weight of the set quantity of products is fed back to the controller of the packing/filling/canning machine. The control box will dynamically adjust the feeding amount to make the average weight of the products. The weight is closer to the target value. In addition to the feedback function, the checkweigher machine can also provide a wealth of report functions, including the number of packages in each area, the total amount in each area, the qualified number, the qualified total, the average, the standard deviation, and the total number and total accumulation. The weight sorter can be used in various industries, such as various industries such as food, medicine, chemical industry, beverage, plastic, rubber and so on. It is mainly used in the following occasions: 1. Final inspection of product weight In the final stage of product production, the weight of the product is re-inspected, and the unqualified products are eliminated to ensure that the weight of the ex-factory product meets the requirements. This is beneficial to ensure the interests of both consumers and manufacturers. Consumers will not suffer losses due to lack of money, and manufacturers will not suffer reputational damage due to customer complaints or even complaints. 2. In addition to providing the weight signal of the product and rejecting the unqualified products, the feedback control weight sorting machine can also output a feedback signal to the packaging filling equipment according to the difference between the average weight and the nominal weight, and automatically adjust the average weight to make the sum The set weight is consistent, thereby reducing production costs. For example, each package of milk powder weighs 450 grams. Without the use of a weight sorting machine, the average weight of the package is 453 grams to ensure that the product weight meets the standard; after using automatic weight feedback control, the average weight can reach 450 grams. Calculated by producing 10,000 packages per day, It can save 30,000 grams per day and 10.8 tons per year. According to the market price of 15 yuan per pack of medium infant milk powder, it can save 360,000 yuan per year. 3. Product missing inspection For products that contain small packages in large packages, such as beverage boxes, where the large bag contains multiple small bags of products, the product will be missing due to equipment or personnel factors. Using the weight sorter to check the weight of the large package can ensure that there is no missing product in the large package. For example, there are 24 bottles of beverages in each box, and the normal weight of each box is fixed. Check the weight of each box to find out whether there is any leakage. 4. Sorting and sorting Automatic sorting for products with uneven weight. For example, if a chicken meat manufacturer wants to divide chicken legs of different sizes into several weight ranges, a weight sorting machine can be used to automatically weigh each chicken wing, and the weight signal will be sent to the PLC, and the PLC will drive the corresponding chicken wings according to the set range. The push plate will send the chicken wings to the corresponding box, so as to complete the purpose of automatic classification. The above applications are some conventional applications of weight sorting machines, and weight sorting machines can also be used in many industries such as military industry and newspaper industry. The United States has used weight sorting machines to check the weight of each bullet, because the weight of the bullet will affect the flight path of the bullet. In addition, the weight sorting machine can also be used to count when distributing newspapers. The number of newspapers may be inaccurate when printing and bundling, and the total quantity distributed to various regions may be inaccurate. The weight sorting machine is used to count quickly and accurately. , which can save a lot of manpower.
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