The opening and closing action of the mold clamping device of the China extrusion hollow plastic blow molding machine is an important process in the injection molding machine's plasticization, injection, pressure holding and temperature reduction, product molding and product demoulding. With the opening and closing action of the mold clamping device, the mold can form a cavity of the injection molded product, thereby ensuring that the mold cavity is not expanded by the pressure of the injection melt, which also ensures the quality of the injection molded product. It can be seen that the firm and reliable combination of the forming mold, the flexibility of the combination of the mold opening, and the convenience and safety of taking out the finished product from the mold are all guaranteed by the accurate and reliable movement in the mold clamping device.
The movement of the commonly used clamping device is completed by hydraulic oil cylinders. There are two types of oil cylinders: liquid-filled pressure-boosted and liquid-filled. The characteristics of the hydraulic mold clamping device are: the entire movement of the injection mold opening and closing (the back and forth movement of the template) and the clamping force are all controlled by the pressure of the hydraulic oil.