The weighing system is the core component of the open mouth bagging machine, determining the accuracy and speed of packing. It consists of the weigh hopper, load cell, and control system. The weigh hopper is connected to the feeding device and is used to load the material to be weighed. The load cell detects the weight of the material, and the control system receives electrical signals from the load cell and controls feeding based on preset target weights.
1. Weighing Methods
①Net weight weighing
It involves weighing the material in a weigh hopper before releasing it into the packaging bag. The workflow is as follows: material enters the weigh hopper via a conveying device, the control system receives signals from the load cell and calculates the weight in the weigh hopper in real time. When the weight approaches the preset target weight, the control system gradually reduces or stops the feeding system to achieve precise measurement.
②Gross weight weighing
It involves weighing the packaging bag during the filling process and does not require a weigh hopper. Before filling, first remove the weight of the empty bag. During the filling process, the weight of the bag and material is measured, and the filling stops when the preset weight is reached.
2. Components of the Weighing System
①Weigh Hopper: A container used for weighing and batching materials.
② Load Cell: Provides real-time weight detection and transmits data to the control system.
③Control System: Receives and processes electrical signals from the load cell and controls feeding and discharging based on preset weight targets.
3.Single Hopper Weighing vs. Double Hopper Weighing
Single weigher bagging machines have only one weigh hopper. When the material inside the hopper reaches the preset weight, the feeding stops. The next weighing and discharging cycle begin only after the material in the hopper has been released into the bag.
Double weigher bagging machine has two independent weigh hoppers that can work alternately. While one weigh hopper completes weighing and prepares for discharge, the other is performing weighing. The double weighing system reduces the waiting time for weighing, offering better continuity and stability.
The information above is open-mouth bagging machine weighing systems introduction, as a professional bagging and packing machines supplier, we can provide machines for granule and powder, if you are interested in our machines, please kindly contact us.
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