First, the working principle of quantitative packing scale The structure of quantitative packing scale: weighing unit, trolley, sewing package conveying device, pneumatic system, dust removal system, quantitative packaging control instrument.
When the quantitative packing scale enters the running state, the weighing control system opens the feeding door to start feeding, and the feeding device is a fast and slow feeding mode; when the material weight reaches the fast feeding setting value, the fast feeding is stopped. Keep the feeding slowly; when the material weight reaches the final set value, close the feeding door and complete the dynamic weighing process; at this time, the system detects whether the bagging device is in the predetermined state, and when the packaging bag is clamped, the system issues control. The signal opens the weighing hopper discharge door, and the material enters the packaging bag. After the material is discharged, the discharge door of the weighing hopper is automatically closed; after the material is unloaded, the bag squeezing device is released, and the packaging bag is automatically dropped; the packaging bag is sewed after being dropped Pack and transport to the next station. This cycle runs automatically.
In summary, the working principle of the quantitative packing scale is divided into two parts:
Weighing part
The weighing part is actually a replenishment process, feeding in a fast manner, stopping quickly when approaching the target weight, and then feeding in a slow manner. Finally achieve the target weight.
2. Packaging part
The bag is pre-clamped, and the bag is automatically dropped after feeding, and then the process of sewing the bag.
Second, the working principle of the combination scale combination scale packaging system structure: hoist, combination scale, work platform, packaging device, coding device (optional), conveyor belt (optional), weight detector, metal detector, equipment Box device (optional), etc.
The conveyor feeds the material into the upper feed tray; the main vibration plate and the line vibration machine automatically controlled by the combination scale feed the material from the upper feed tray into the buffer feed hopper; and then enter the weighing hopper. The processor selects, arranges, and combines according to different weight values ​​in the weighing hopper, and selects the combination closest to the set value. The weighing hopper of the combination is opened, and the material is sent to the collecting hopper through the chute collection or directly into the hopper. Packaging machine, complete the packaging. At the same time, the processor outputs and receives online signals to coordinate with other devices (such as packaging machines, elevators, etc.).
In summary, the principle of the work of the combination scale is divided into two parts:
Weighing part
The weighing part is actually a process of combined selection, which is composed of a plurality of weighing units with independent feeding and discharging structures. The general microcomputer combined weighing scale is composed of 10 to 32 weighing units. The computer uses the arrangement and combination principle to automatically and optimally combine the weight values ​​of the weighing units to obtain the best combination that is closest to the preset target weight value for packaging. For example, a computer combination weigher with ten weighing units, each weighing unit is weighed during weighing, and the weight data in each weighing hopper is read into the computer, and the preferred combination is performed by the computer, according to the combined number. A total of 1023 combinations can be achieved with ten weighing units, and the computer selects the combination closest to the target weight value from the 1023 combinations.
2. Packaging part
The packaging part can be freely selected, and the large direction can be divided into two types: fully automatic and semi-automatic.
(1) In order to save costs, a semi-automatic method, that is, a manual feeding method, can also be implemented.
The conduit is arranged at the position of the tray under the combination scale, and the packaging bag, the packaging box and the packaging can are placed under the catheter, and controlled by the foot switch to realize discharging, and then proceed to the next step.
(2) Considering the current large capacity, the future production output will increase. High output and low loss, the most convenient is the fully automated weighing packaging system.
The combination scale gives the packaging machine signal, the packaging machine is immediately packaged, and the packaging line can be purchased according to the requirements of the own packaging. The vertical packaging machine is suitable for back-sealing bags; the bag-type packaging machine is suitable for pre-made bags or zippered vertical bags; and the filling machine is suitable for filling food and boxed food.
The above is the principle analysis of the quantitative packaging scale production line and the computer combination scale packaging production line, hoping to help those who are eager to seek automated packaging. For more industry information, please pay attention to: the industry dynamics of Guangdong Haichuan Intelligent Machine Co., Ltd. Http://
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