Working principle and application process of on-line checking weight scale
Online check weight scale also known as: automatic check weight scale, weight sorting scale. It is a medium low speed, high
Precision online inspection equipment, can be integrated with a variety of packaging production lines and conveying systems, mainly
It is used to check whether the weight of the product is qualified, whether the parts are missing in the package or the weight of the product is stored
Files. On-line inspection focuses on modern industrial production. Especially in the production process of food and pharmaceutical industries
Has gradually become an indispensable link. On-line inspection of the weight scale in the product delivery process
Complete the measurement of the weight of the product and compare the measured weight with the pre-set range by
The controller issues instructions to remove products that are not qualified for weight, or to remove products in different weight ranges
Distribute to designated areas. Online inspection of the weight scale production by weighing conveyor, controller, in and out of the material transport
The feed unit is completed. The weighing conveyor completes the collection work of the weight signal, and the weight signal
Send to controller for processing. The feed conveyor mainly ensures the product by increasing the speed
There's enough space. The discharge conveyor is used to transport the finished product out of the weighing area
Domain. The working process of the online inspection scale is as follows: Prepare the product to enter the feed conveyor by weighing it
The speed setting of the material conveyor is generally determined according to the spacing of the product and the required speed
Agreed. The purpose is to ensure that only one product is on the scale during the operation of the inspection scale. According to
After the product enters the weighing conveyor, the system responds to external signals, such as photoelectric switching signals
Number, or internal level signal, identifies the product to be detected as it enters the weighing area. According to weighing conveyor
The running speed and the length of the conveyor, or according to the level signal, the system can determine the product
Time to leave weighing conveyor. From the time the product enters the scale to the time it leaves the scale, the load cell will
When the signal shown in the following figure is detected, the controller selects the signal processing place in the signal stabilization area
You can get the weight of the product. Sorting process when the controller gets the weight signal of the product
After that, the system will be compared with the pre-set weight range, and the product will be sorted, and the sorting type will be different according to the different application, mainly the following types of children :1) nonconforming products
Remove, 2) Remove overweight and underweight respectively, or transport to different places 3) according to different
Weight range, subdivided into different weight categories report feedback Check weight scales all have weight signal feedback
The function usually feeds back the average weight of a set number of crystals produced to the packing/filling/canning machine
In the controller, the controller will dynamically adjust the feed amount to make the average weight of the product more consistent
Close to the target value. In addition to the feedback function, the weighing scale can also provide rich reporting functions, every
District package quantity, total amount per district, qualified quantity, qualified total amount, average value, standard deviation and
Total quantity and total accumulation. Online weighing scales can be used in a variety of industries, such as all kinds of food, medicine
Pharmaceutical, chemical, beverage, plastic, rubber and other industries. Mainly used in the following occasions:
I,
Final inspection of product weight The weight of the product is duplicated at the final stage of product production
Inspection, the unqualified products are removed to ensure that the weight of the product meets the requirements. There is
It is beneficial to ensure the interests of both consumers and manufacturers. Consumers will not be short-changed
If you suffer losses, the manufacturer will not be honored because of customers' complaints or even complaints
Damage. 2, feedback control automatic weight check scale in addition to providing the weight signal of the product, will not be compatible
The output feedback can also be based on the difference between the average weight and the nominal weight
Signal to the packing filling device, automatically adjust the average weight to make the sum of the set weight consistent, from
And reduce production costs. For example, the weight of each pack of milk powder is 450 grams, and the packaging is not used
The average weight is 453 grams to ensure that the weight of the product meets the standard, and the automatic feedback control is used to check the weight
After that, the average weight can reach 450 grams, and the daily production of 10,000 packets can be saved
30000 grams, saving 10.8 tons per year, according to the market price of medium infant milk powder 15 yuan per pack
Calculated, annual savings of 360,000 yuan. 3, product missing check for large packages containing small packages
Products, such as beverage boxes, large bags containing multiple bags of products in the occasion, due to equipment or personnel factors, will cause product loss. Use the weighing scale to check the weight of large packages,
It can ensure that there is no missing product in the large package. For example, 24 drinks per case,
The normal weight of each box is certain. Check the weight of each box to find out whether there is any missing loading
Elephant. 4. Classification Automatically classifies products with uneven weight. Like dividing chicken
If the manufacturer wants to divide the chicken legs of different sizes into the weight range, the weight pair can be used
Each chicken wing is automatically weighed and the weight signal is sent to the PLC,
PLC according to the setting
The range drives the corresponding push plate to send the chicken wings to the corresponding box, thus completing the automatic classification
Purpose. The above applications are some routine applications of checking weight, and automatic checking weight scales can also be applied to the military
In many industries, including industry and newspapers, the United States used a weighing scale to check the weight of each bullet,
Because the weight of the bullet affects the trajectory of the bullet. An automatic weighing scale is also available
To count newspapers when they are distributed, newspapers may not be in the right quantity when they are printed and bundled, distributed
The total quantity to each area may be inaccurate, and the use of a weight scale for counting is fast and accurate.
Can save a lot of manpower.