The previous Eagle figure injection molding machine technology department introduced the injection pressure and speed regulation method of the injection molding machine. The injection pressure and speed regulation of the injection molding machine is completed through the proportional valve.
So what is the proportional valve? The proportional valve is a hydraulic component, which consists of a valve body and an oil coil. Its working principle is to control the flow / pressure opening degree of the valve by controlling the current in the oil Zhi coil. The current in the oil Zhi coil and the flow opening degree of the valve body change according to a certain proportional linear relationship, so it is called proportional valve, which can be divided into proportional flow valve and proportional pressure valve. The linear relationship between current and flow and pressure of valve body can be set by CPU and electronic amplifier of injection molding machine.
The current displayed by the DSCA ammeter and DPCA ammeter on the horizontal energy-saving injection molding machine changes according to the change of the proportional flow and the corresponding coil voltage of the oil valve on the proportional pressure valve. The output voltage of the electronic amplifier board controls the proportional flow valve and the proportional pressure valve, and then controls the oil pressure and the oil flow by controlling the coil engagement degree of the proportional flow valve and the proportional pressure valve. Finally, the purpose of regulating the injection pressure and the injection speed of the injection molding machine is achieved.
The relationship between the proportional valve of the injection molding machine and the CPU processor of the computer is similar to that between the human brain and the limb organ, while the electronic amplifier board is equivalent to the nerve. The brain sends out instructions, transmits signals through the nerve, and completes the corresponding actions. Similarly, the operation process of the injection molding machine can be specifically expressed as: first set parameters, then process them through the CPU of the computer, and transmit the processing signals through the electronic amplifier board To the proportional valve, the final injection process to complete the various actions.
In addition to controlling the injection pressure and speed of the injection molding machine, the back pressure proportional valve can also control the movement of the screw to achieve the purpose of opening and closing the mold.
It can be seen from this that the function of proportional valve of injection molding machine is mainly to adjust injection pressure, speed and opening and closing mold. This is the introduction of fengtiejun about the function of proportional valve of injection molding machine. I hope it can help you.