What are the common methods of servo energy-saving injection molding machine energy saving
There are three main energy-saving schemes for injection molding machines: one is to install frequency converters on injection molding machines; the other is to adopt a new heating method for the heating barrel; the third is to use the heat of the heating part to bake materials, which can save energy. Purpose.
Injection molding machine with frequency converter
At present, most of the domestic injection molding machines are quantitative pump injection molding machines, and 80% of the injection molding machines currently operating in the Pearl River Delta are quantitative pumps. The principle of the production cycle of the injection molding machine is mold closing----injection----holding pressure for a return material----cooling----opening the mold----ejection.
After installing the frequency conversion energy-saving device, the controller automatically detects the pressure and speed settings of all stages in the production process (mold clamping, injection molding, pressure holding, material return, cooling, mold opening, ejection), and calculates the corresponding ratio The control signal is output to the frequency converter, and the frequency converter dynamically adjusts the click speed according to the received control signal to ensure that the hydraulic oil output by the oil pump produces as little reactive backflow as possible, to achieve the purpose of energy saving.
new heating method
The heating method of the injection molding machine is generally heating by the electric heating coil, and the heat is transferred to the barrel through contact conduction. Only the heat close to the inner side of the barrel surface is transferred to the barrel, and most of the outer heat is lost to the air. Heat conduction loss and the dissipated heat will cause the temperature of the working environment of the injection molding machine to rise. Electromagnetic heating technology is to make the metal gun barrel self-heating and can wrap a certain heat insulation material outside the gun barrel according to the specific situation, which can effectively reduce the heat loss and improve the thermal efficiency, so the energy saving effect is very significant, and the energy saving rate of the system It can be 10% to 35%.
heat recovery and reuse
During the working process of the injection molding machine, while the heating ring heats the barrel, there is still a part of the heat directly dissipated into the air, while the traditional dryer uses a heating tube to blow hot air into the barrel through a blower, and directly Hot air is exhausted to the outside, both causing energy loss and an increase in the temperature of the working environment. The injection molding machine is equipped with waste heat recovery equipment, using the closed-loop control concept of heat energy, through the heat energy collection technology, the heat energy of the barrel of the injection molding machine is collected, and then the heat energy is collected for reuse of the baking material, and the wasted heat is collected and recycled. To achieve the double effect of improving the environment.