Shanghai Saifeng (Home) Packaging Machinery Co., Ltd.
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Principle and application of multi-head combination scale
What is a multi-head combination scale?
Multi-head combination scale, also known as combination weighing scale, is applied to the rapid quantitative weighing packaging of granular, strip and irregular materials. It is composed of multiple independent weighing and feeding structure weighing units. First, AD weighing The module converts the elastic deformation of the pressure sensor weighing unit into a weight value and stores it in the register. The CPU uses the arrangement and combination principle to automatically calculate the weight value of the weighing unit, and obtains that the Zui Jia and Zui are close to the target weight value. The weight combination is packaged.
Composition of combination scale
1 upper feed hopper 2 material photoelectric detection switch 3 main vibration plate (main vibration machine) 4-line vibration plate (linear vibration machine) 5 storage hopper 6 weighing machine 7 drive equipment (stepping motor) 8 lower trough 9 collection hopper 10 motor Driver board 11 main board 12A/D module
How the combination scale works
1. The material is placed in the upper feed hopper and vibrated by the main vibrating plate to distribute the product to the linear vibrating plate on the conical funnel.
2. When the material in the line vibrating plate is not enough or not enough, it will be detected by the material photoelectric detecting switch. This is to send the feeding signal to the main board, and then send the feeding signal to the material conveyor through the main board until it is added to the photoelectric detecting switch to detect the material. until.
3. The vibration of the line vibration machine drives the vibration of the line vibration plate, and adjusts the appropriate amplitude and vibration time to send a certain range of material weight to each storage hopper.
4. The driving device is the stepping motor, open the storage bucket door, and send the material to the weighing hopper. When the weighing hopper below has no material or when the material in the weighing hopper is not enough, the storage hopper will automatically open the door and put the material into the weighing. Fighting.
5. The material is in the weighing hopper, the weight signal is generated by the sensor, and then transmitted to the main board of the control device through the lead wire. The CPU on the main board reads and records the weight of each weighing hopper, and then calculates, analyzes, and combines to filter out Zui is close to the target weight of the weighing weigher. When receiving the requesting discharge signal sent by the packaging machine, the CPU sends a signal to start the weighing bucket motor drive to open the selected weighing bucket to unload the product into the lowering trough and enter the packaging. Machine (If there is a collecting hopper, the weighing bucket is combined and directly discharged to the collecting hopper, and when the feeding signal is requested, the collecting hopper motor is started to discharge to the packaging machine).
6. When the weighing hopper (collector) is finished, the combination scale will send a discharge signal to the packaging machine. After the packaging machine receives the discharge signal, it will start to seal the bag, when the packaging mechanism is good. The combined weighing scale is sent to the combination weigher to call the combination scale, and the cycle is repeated.
7. The main advantages of the multi-head combination scale
1. Mechanical automatic weighing for food safety
2. Fast weighing
3. High dynamic weighing accuracy
4. high degree of automation
Application range of multi-head combination scale
It is suitable for rapid quantitative weighing of various granular, flake, strip, spherical and other materials. Such as candy, fruit (raisins, dates...), nuts (walnuts, pistachios...), pet food, roasted seeds and nuts (melons, peanuts...), puffed foods (chips, shrimps...), frozen foods (nut dumplings, dumplings... ), hardware, plastic rubber pellets, etc., which need to be weighed quantitatively.
Why multi-head combination scales are particularly favored by various food companies
Using the computer 10 combination scale for quantitative weighing compared with the general electronic scale, the same work is done: (1) 1 computer combination is required, 2 operators are operated, the speed is 60 packs/min, and the single bag error is 0.3. ~0.5g, total error is about 14kg per day, the total error is about 4 tons per year, while the general electronic scale requires 5 sets, 10 operators, speed 12 packs/min, single bag error 3g, total error 86kg per year, annual The total error is 26 tons. Obviously, using a computer combination can save 8 workers and 22 tons of raw materials per year. It is not difficult to see that the choice of multi-head combination scale is the smart choice of the business.
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