The automatic mixer for ton bags calculates the formula based on the detection data, and inputs it into the computer system through the human-machine interface or computer network. The computer control system automatically calculates the supply ratio of each raw material according to the detection data and the process formula. Then, the PLC control system integrates the supply speed of each raw material supply system and precisely and continuously completes the raw material ratio in the process sequence. The mixer takes multiple sets of parameters such as raw material composition and auxiliary material composition as the calculation basis, and combines the actual production to calculate the required data for the specific production process design. The system software includes subsystems such as raw material component input and ingredient calculation. The Weighing system is designed and implemented using the ORACLE database system and c# language. It has been successfully applied to the batching site while ensuring the accuracy of calculation and the beauty and convenience of the interface.

The main unit of the weighing and mixing system adopts an industrial PC as the upper computer (an industrial computer that is fully compatible with ordinary computers and more suitable for harsh industrial environments) + PLC+ weighing module (or weighing signal sample) + load sensor + weighing actuator. It may include a metering control host (upper computer), weighing software (metering software/control software), plc weighing control instrument, weighing sensor, weighing bin, also known as bucket scale or bin scale, which can be an incremental scale or a subtractive scale. And in most cases, it is controlled by a frequency converter.

The weighing and feeding system will also be composed of an upper computer - industrial computer, a lower computer -PLC programmable controller, powder batching, liquid batching, micro-feeding and control system, etc. This weighing and batching control system is an automatic weighing system that uses vacuum feeding, quantitative feeding by the feeding screw, automatic weighing and batching by the weighing hopper, and cumulative weighing simultaneously. It is suitable for precise measurement of materials and automatic batching operations in the production process.

The batching method can be reasonably selected based on the characteristics of the industry, the requirements of the production process, and the specific properties of the materials, such as "incremental" or "subtractive" weighing methods. It has multiple working modes including single-bucket single-material, single-bucket multi-material, and multi-bucket multi-material.

The automatic mixing system has the following advantages:

The entire system adopts a distributed structure, featuring good openness, easy expansion, and stable and reliable performance. The structural mode is: "upper computer +PLC system + solid batching control instrument". The connection of each part of the equipment uses RS485 fieldbus, which is simple and reliable in structure.

(2) The weighing instrument adopts high-quality controllers, featuring high precision, high reliability and strong anti-interference ability. The sensor adopts a high-precision weighing module. The weighing module is easy to install and convenient to maintain.

(3) The computer monitoring and management function used in the weighing and Batching system is powerful, capable of real-time collection and timely display of operating conditions and related data. The picture is vivid and dynamic. It can automatically complete the batching process flow of the system. The computer screen displays the working process of the weighing batching control system in real time. The software operation is simple and the picture is realistic.

(4) The product has high reliability. The upper computer software sets operation passwords and important parameter passwords for modification and protection. Moreover, users can achieve hierarchical management and arbitrarily define the permissions of personnel. Intelligent reporting software provides a large amount of data information for production management, such as ingredient result lists, raw material consumption lists, production volume lists, and records of formula usage results, etc. It also has statistical and printing functions for production team reports, daily reports, monthly reports, and annual reports by time, formula, etc.

(5) The fault response is accurate and timely. It can automatically display or print the fault time, nature and location, and issue audible and visual alarms. The control modes can be classified into remote automatic, local automatic, local manual and local instrument control operation methods, etc.