The structure and function of parts of gravity casting machine

2022-09-06

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, nozzle mechanism, injection mechanism, power system and control system. The frame mainly plays the role of support and connection , so that all functional mechanisms can form an organic whole.

The mold opening and closing mechanism is composed of an unlocking mold cylinder and a toggle mechanism. The unlocking mold cylinder provides the power to open and close the mold. The toggle mechanism amplifies this force ten to two times, thereby forming enough locking force to prevent molten metal from die casting. The parting surface of the mold overflows. The ejector mechanism is mostly an ejector cylinder, and its function is to provide sufficient ejection force to eject the workpiece from the cavity after the mold is opened.

The nozzle mechanism of the gravity casting machine is to make the water inlet of the die-casting mold closely match the nozzle before injection, so as to prevent the molten metal in the injection from splashing out from the water inlet of the die-casting mold. At present, the nozzle fastening cylinder is mainly used to realize the nozzle fastening action. Additionally, during maintenance, the die holder can be removed by the nozzle mechanism to make room for operation.

The injection mechanism is the key component 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. The gravity casting machine is designed for 2-stage injection. One of the rapid-fire materials is exhaust, which requires slower; The 2-speed shooting is for filling, and it is required to be fast enough, and the conversion from the first speed to the second speed should be as fast as possible to form a sufficient filling speed.

The function of the power system is to provide power for the movement of each functional mechanism of the gravity casting machine, so as to realize the action cycle. The control function of the system is to send out control signals according to the predetermined action program requirements, so that all mechanisms operate in sequence to complete the die-casting operation.