The pneumatic weighing mixer consists of dust-free feeding, material conveying, storage bin, weighing and metering, mixing and homogenization, control system, steel structure platform and other parts; It can be widely used in various powder processing industries such as plastics, chemicals, food, pharmaceuticals, and building materials. The mixer adopts a comprehensive automation system that integrates microcomputer control and data management through processes such as weighing and feeding, formula control, mixing homogenization, and material conveying. It uses Mitsubishi or Siemens series PLCs and industrial control microcomputers to form a high-performance control platform. For designing an automation system for production control, it is necessary to achieve stable and reliable operation, simple and practical operation, and superior cost-effectiveness.

The hopper scale is equipped with a weighing module and connected to an industrial computer for input. This system is designed to manually check the zero position of each hopper scale during shutdown, and monitor whether the hopper scale returns to the zero position normally; Automatic zero detection during continuous batching operation can correct the zero position changes of the hopper scale, ensuring measurement accuracy. After the operator clicks on the ingredient operation process, the PLC controls the pneumatic valve and screw for the first material feeding to open. The material is slowly added to the hopper scale, and the computer monitors the signal transmitted by the weighing and measuring module in real time, comparing it with the target value set by the formula. When the set formula target value is reached, the PLC control output is disconnected, and the pneumatic valve and screw for the first material feeding are closed. After stabilization, the total weight of the hopper scale and the added material is measured, and this value is used as the zero position before the second material feeding. Next, the feeding process of the second material will begin, repeating until the second, third,... are all added.

The feeding process ends and all pre-set feeding conditions are met, and the feeding process begins. The pneumatic valve for discharging is opened, and the mixture flows out naturally under the action of gravity. The system monitors the signal transmitted by the sensor of the hopper scale in real time. When the total weight of the hopper scale is detected to have returned to the initial zero position, the discharge valve closes, the discharge process ends, and the mixing process enters. The operator can pre-set the sequence of each feeding opening. The system can record the tank number during seed transportation, the actual feeding amount of each raw material, the deviation from the target value set in the formula, the start and end time and time of feeding, as well as the start and end time and time of discharging and other operational data. Through the application program on the upper computer, it is possible to query and print the raw data and statistical reports of the system's operation.

The equipment adopts advanced automation product control. Using German SIEMENS programmable logic controller (PLC) and touch screen (HMI) for logic control; Famous brand low-voltage electrical appliances; Delta inverter; And Weighing modules, etc. The products are exported to various places and have received high praise from numerous customers. The design of the entire system is customer-oriented, with reasonable configuration and user-friendly operation. Allowing you to use high-tech products while bringing joy and convenient satisfaction to your work.

Composition of the mixer

1) Control section: The upper computer adopts industrial control microcomputers, with Mitsubishi or Siemens series PLC communication modules and switch input/output modules, as well as manual/automatic control switching switches, manual control buttons, and indicator lights all installed in an integrated control cabinet for easy operation;

2) Software part: Tailored according to the basic requirements of the ingredient system and the actual needs of users;

3) Weighing section: using high-precision weighing modules, combined with weighing control instrument combinations;

4) Feeding section: pneumatic valve control and screw frequency conversion are used for feeding and discharging control;

5) Mixing section: Configure relevant mixing equipment according to material mixing and customer requirements;

6) Conveying part: using spiral feeding or pneumatic feeding to be responsible for feeding to the designated position