1. How does the food packaging machine work?
The current pillow-type automatic packaging machine adopts the domestic leading and most mature and reliable technology design and production, and brings together the essence of many years of experience in the field of packaging machinery. The packaging machine can pack a block of food with various composite packaging film coils, which is very suitable. The needs of the majority of users in China.
1) The electrical part of the automatic packaging machine generally consists of the following:
a) The main control circuit consists of a speed sensorless vector inverter and a programmable controller (PLC) to form a control core;
b) The temperature control circuit is composed of intelligent temperature control meter, solid state relay, thermocouple element, etc. The temperature control is precise, the display is intuitive and the setting is convenient;
c) Multi-point tracking and detection by photoelectric switch, electromagnetic proximity sensor, etc.;
2) Fully automatic pillow working principle
With the improvement of the degree of automation, the operation, maintenance and daily maintenance of the packaging machine are more convenient and simple, and the professional skill requirements of the operator are reduced. The quality of the product packaging is directly related to the temperature system, the accuracy of the host speed, and the stability of the tracking system.
The tracking system is the control core of the packaging machine, and the forward and reverse two-way tracking is used to further improve the tracking accuracy. After the machine is running, the film mark sensor continuously detects the film mark (color mark), and the mechanical part of the tracking micro switch detects the position of the machine. The above two signals are sent to the PLC. After the program operation, the output of the PLC is Y6 ( The company is tracking and tracking, and the Y12 (anti-chasing) control tracks the forward and reverse tracking of the motor. The errors in the production process of the packaging materials are timely found and compensated and corrected accurately, which avoids the waste of packaging materials. If the test fails to meet the technical requirements after tracking the predetermined number of times, it can automatically stop for inspection to avoid the generation of waste products;
Due to the use of frequency conversion speed regulation, the chain drive is greatly reduced, the stability and reliability of the machine operation are improved, and the noise of the machine operation is reduced. It ensures the high-tech, high-efficiency and high-tech level of the packaging machine with high efficiency, low loss and automatic detection. It has both a beautiful and stylish appearance and a healthy and astute mind.
Although the transmission function of the food packaging machine is relatively simple, it has high requirements on the dynamic performance of the transmission, and the system requires fast dynamic following performance and high speed stability. Therefore, the dynamic technical specifications of the inverter must be considered, and high-performance inverters can be selected to meet the requirements.
ABB's speed sensorless vector inverter meets the requirements of the packaging machine because it has the following features:
1) Apply speed sensorless vector control technology, with automatic tuning function, automatically correct the frequency to achieve the effect of stable motor speed when the load changes;
2) It has high steady speed accuracy and fast dynamic response, which can meet the transmission control requirements of high performance applications. Reduces time and economic losses due to driveline failures. At the same time, the speed sensor is omitted, which has lower maintenance costs.
3) It has the advantages of rich functions, stable performance, miniaturization and low noise operation. 
Main circuit of speed control system
2. Advantages of applying variable frequency speed control equipment
1) Simplify the transmission system, greatly reduce the failure rate and reduce the maintenance cost of the enterprise.
2) Increase production and reduce costs. It can improve production technology, improve product output and quality, and effectively save costs and maximize profits.
3) Implement software control and improve functions.
4) Through the functions of torque compensation, anti-stall and restart, the non-tripping operation is realized; the quality of the products produced is stable and the efficiency is improved. (