injection molding machine It is a kind of commonly used plastic processing equipment, which is used to inject molten plastic materials into molds, cool and solidify them by pressure. In the process of injection molding, pressure control is very important, which affects the quality, size and appearance of products. Next, we will introduce the realization method and related considerations of the pressure control of the injection molding machine.
1. Hydraulic system: injection molding machines usually use hydraulic system to realize pressure control. The hydraulic system is composed of hydraulic pump, hydraulic valve and hydraulic cylinder. By controlling the switch of the hydraulic valve, the movement speed and force of the hydraulic cylinder can be adjusted to realize the pressure control of the injection molding machine.
2. Pressure sensor: The pressure sensor is an important part of the injection molding machine, which is used to monitor the pressure changes in the process of injection, pressure holding and cooling in real time. By connecting the pressure sensor to the control system, the operator can monitor and adjust the pressure of the injection molding machine to ensure the stability of product quality.
3. Control system: the pressure control of the injection molding machine is usually completed by the control system. The control system can automatically adjust the working state of the hydraulic system according to the set value by programming the pressure curve and pressure threshold to achieve accurate pressure control.
4. Pressure regulation: the injection molding machine operator can manually adjust the pressure during injection, pressure holding and cooling according to the product requirements and process parameters. By adjusting the flow and pressure valve of the hydraulic system, you can control the pressure size and change speed of the injection molding machine.
In practical application, the pressure control of injection molding machine also needs to consider the following factors:
1. Characteristics of injection molding materials: different plastic materials have different fluidity and melting temperature, so the characteristics of materials need to be considered during pressure control to ensure that they can fully fill the mold cavity and maintain a certain pressure.
2. Mold design and size: The design and size of the mold directly affect the pressure demand in the injection molding process. Reasonable mold design can reduce the flow path resistance and reduce the pressure loss during injection molding.
3. Optimization of process parameters: the operator of the injection molding machine can control the pressure change during the injection molding process by optimizing process parameters, such as injection speed, pressure holding time and cooling time, to obtain better product quality.
Injection molding machine manufacturer In conclusion, pressure control of injection molding machine is one of the keys to ensure product quality. Through reasonable hydraulic system, pressure sensor, control system and operator's technical mastery, accurate control of injection molding machine pressure can be achieved, so as to produce high-quality plastic products that meet the requirements.
