Application of FGI FD300 Series Low Voltage Frequency Inverter in die casting machine
1.Introduction
For the die casting industry, power consumption is the main part of its production cost, and the die casting machine is one of the main energy consumption equipment of the product factory, known as the electric tiger. Therefore, reducing the energy consumption of die casting machine has become an effective way to reduce the cost of die casting industry and improve the competitiveness of products.
2.Industry profile
At present, the vast majority of die casting machines belong to hydraulic transmission die casting machines, and the power in the hydraulic transmission system is provided by the motor driven oil pump. In the process of die casting cycle changes, the flow and pressure required by the die casting machine under different processes are different, and the flow valve and pressure valve must be relied on to adjust the different flow and pressure required by different processes. And when the load change is relatively large, because the quantitative pump can not adjust the output power, so the excess energy can only be consumed in the baffle, oil leakage, oil temperature rise, but also aggravate the wear of various valves, and cause the oil temperature is too high, motor noise is too large, and mechanical life is shortened. And usually in the design of the motor capacity is much higher than the actual need, there is a "big horse car" phenomenon, resulting in a lot of waste of electric energy. Therefore, it is of great significance to promote the application of frequency converter in die casting machine to reduce energy waste.
3.Drawback
Die casting machine mold closing and release, mold opening system requires low oil pressure, and short time; The oil pressure required by the injection, pressure holding, and cooling system is higher and the time is longer, generally 40% to 60% of a working cycle. The length of time of each stage is related to the workpiece; The length of the intermittent period is also related to the processing of the workpiece, and sometimes the intermittent period can be avoided. If the injection screw is driven by a liquid oil motor, the system oil pressure will be higher during injection. The weight of the workpiece processed by the die casting machine varies from tens of grams to tens of thousands of grams. Therefore, the die casting machine is divided into small and medium-sized and large, processing tens of grams of small workpiece and processing several kilograms of large workpiece a cycle time is not the same, that is, for the same die casting machine, the raw materials for processing the workpiece are different, the pressure and time required in each stage of the process also need to change.
4.Advantages of using FGI FD300 Series Low Voltage Frequency Inverter
After the transformation, FD300 series low voltage frequency inverter automatically adjusts the motor speed according to the pressure flow required by the die-casting machine, and the power saving effect is obvious, improving the power factor of the power grid and reducing the reactive power loss.
The soft start of FD300 series low voltage frequency inverter reduces the impact on the power grid, prolongs the life of the power supply equipment, and plays a role in increasing the capacity of the transformer, alleviating the pressure of increasing capacity.
As the motor speed is reduced, the wear of the oil pump is also reduced, the noise is reduced, the maintenance cost is reduced, and the service life is extended.
