In a plastic sheet production enterprise in Guangdong Province, the customer put forward the following needs:
1. According to the melting point of the data, the length of the inner cavity of the main screw, the zigzag pipe, the mold head and other components, it is necessary to guarantee
a. The electric heating temperature of each place is up to standard;
b. Plastic raw materials have good fluidity and viscosity in the cavity;
c. The PLC communicates normally with the temperature module, and can be automatically restored after the connection is dropped;
2. It is necessary to ensure that the feeding amount of the feeding motor is equal to the amount of swallowing at the screw mouth of the main engine;
3. In order to ensure the uniform thickness of the sheet formed by the mold head and suitable for the normal production of various raw materials (PP, PE) and shapes (prototypes, sheet types), it is necessary to ensure that the pressure of the screw host fluctuates steadily ± 0.2Mpa, and the pressure is stable and constant again within 5-10 minutes during the acceleration and deceleration process;
4. It is necessary to completely synchronize the speed of the three (multi) roller transmission and the traction roller, and the speed must reach 50 m/min.
INVT System Program
Plan clarification
According to the needs of customers, INVT launched AX70 controller + GD350 inverter EtherCAT bus control, after the whole system development and use of programs to complete customer needs, now the pressure control is stable within customer requirements, and the speed synchronization rate is >=99.8%.
Program Benefits
1. Convenient and easy to use: the electrical wiring system is very convenient, and the network cable can be connected;
2. Strong anti-interference: EtherCAT system has strong anti-interference, low latency, high response and high reliability;
3. Stable pressure: After pressure PID control and correction algorithm, the pressure is stably controlled within 5-10 minutes, and the unit is stable and smooth in the acceleration and deceleration process, and the transition is completed and stabilized again, which solves the problem that the control system of competing products is difficult to complete the pressure stability again in the acceleration and deceleration process of the host speed is fast and slow, abnormal fluctuations, and has been highly recognized by customers.
4. Reduce customer cost: AX controller is based on Codesys standardized, open, component-based development channels, rich instructions, functional library integration, outstanding support for third-party equipment development, to provide customers with the best control and development cost, compared with a competitive product 30% lower cost.
AX70 controller EtherCAT bus plan has been successfully used in the extruder, according to various data process requirements, through constant pressure acceleration and deceleration algorithm control, the customer's core value of the pressure is stable in the target range of ±0.2Mpa, to achieve the customer's expected goal, for the high performance of the plastic sheet machine to provide a strong guarantee.
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