The structure and functions of gravity casting machines

      The structure of the Gravity Casting Machine and the functions of its components. The structure of the gravity Casting Machine mainly includes the frame, opening and closing mechanism, ejection mechanism, button mechanism, injection mechanism, power system and control system. The rack mainly plays the role of support and connection, so that various functional mechanisms form an organically integrated whole.  

     The function of the power system is to provide power for the gravity casting machine for the actions of each functional mechanism to achieve an action cycle. The function of the control system is to send out control signals according to the predetermined action program requirements so that each mechanism can act sequentially to complete the die-casting operation.

 

　　The opening and closing mechanism consists of a mold opening and locking cylinder and a toggle mechanism. The mold opening and locking cylinder provides the power to open and close the mold, while the toggle mechanism amplifies this force by more than ten to twenty times in order to form a large enough lock shape. force to prevent the molten metal from overflowing from the parting surface of the die-Casting mold. The ejection mechanism is mostly an ejection cylinder, and its function is to provide sufficient ejection force to eject the workpiece from the mold cavity after the mold is opened.

 

　　 The injection mechanism is a key part of the gravity casting machine to realize the die-casting operation. Its structure and performance determine the main process parameters such as injection force and injection speed in the die-casting process. Gravity casting machines are all designed with two-stage injection. The first-speed injection is for exhaust, which needs to be slower; the second-speed injection is for filling, which needs to be fast enough, and the conversion from the first speed to the second speed must be as quick as possible to form a sufficient filling speed.

 

 

　　 The nozzle locking mechanism of the gravity casting machine is to make the water inlet of the die-casting mold closely fit with the nozzle before injection to prevent the molten metal from splashing out from the water inlet of the die-casting mold. At present, most of the nozzle cylinders are used to realize the nozzle action. In addition, during maintenance, the nozzle mechanism can be used to move the mold base away to free up a certain operating space.