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Good solution for energy saving of servo injection molding machine: asynchronous servo energy saving

Mar 04, 2020

The energy saving of the servo injection machine can be divided into two parts: one is the power part, and the other is the heating part. Considering the various forms of energy-saving conversion of injection molding machines in the market, servo-energy-saving conversion is characterized by high stability and high speed of energy saving. High stability characteristics appear, as well as low cost, low after-sales service, etc., to compete with synchronous servo.

Traditional plastic equipment also has a certain potential in terms of energy saving, because the previous design was often focused on the production capacities of one machine. In the design of energy-saving plastic machines, production speed is no longer the most important indicator. The most important indicator is energy consumption per unit weight of products. Therefore, the mechanical structure, control mode and working conditions of the equipment should be optimized taking into account the minimum energy consumption.

The asynchronous servo-energy-saving series injection molding machine is equipped with a high-performance servo control system with adjustable servo speed. During the injection molding process, the machine generates different frequencies for different pressure flows and precisely controls the flow in a closed loop to achieve injection molding of an induction motor. High speed of reaction to energy consumption of the machine, the best coordination and automatic adjustment. In addition, the energy-saving rate after servo conversion is determined based on detailed parameters, such as the tonnage of the injection molding machine, engine power, and also cooling and holding times. Generally speaking, the larger the tonnage, the longer the cooling and holding times, the higher the energy-saving rate after conversion. The more energy you save. The more you save on energy bills.

A traditional injection machine uses a fixed pump to supply oil. The requirements for speed and pressure of each action in the injection molding process are also different. It uses the proportional valve of the injection molding machine to overfill oil through the oil return line. In the return tank, during the whole process, the engine speed is constant, therefore the volume of fuel supply is also fixed, and since the actuating action is intermittent, it is impossible to ensure full loading, therefore the quantitative supply of fuel is very large Spent space, at least 35-50% in accordance with actual measurements.

The AS300 Electric asynchronous servo drive is aimed at this wasted space, real-time detection of the proportional flow signal from the CNC system of the injection molding machine and timely adjustment of motor speed (i.e. flow control) necessary for each working condition. to allow pumped flow and pressure, just to meet the needs of the system and when inoperative, stop the engine to work, so that the space to save energy will be further increased, so asynchronous servo-saving energy reconstruction of injection molding machines can bring good energy-saving results.