Die-casting die capable of adjusting flow field state in die cavity and die-casting process

Abstract

The invention provides a die-casting die capable of adjusting the flow field state in a die cavity, and belongs to the technical field of die-casting dies, the die-casting die comprises a die body provided with a cavity and a pouring gate, and the pouring gate is communicated with the cavity; and the exhaust hole group is arranged on the mold body and communicated with the cavity, and the exhaust hole group can exhaust gas in the cavity to the outside. The invention further provides a die-casting process, and belongs to the technical field of die-casting processes. The method has the beneficial effects that the exhaust holes are formed in the important areas of the cavity, the air suction devices are installed at the exhaust holes, in the die-casting and mold-filling process, according to the specific requirements of the technology, rapid air exhaust is conducted on the different exhaust holes, the air flow state in the cavity is adjusted, and therefore molten metal is guided to enter the designated areas in sequence; molten metal mold filling sequences and mold filling states of different areas are regulated and controlled, the state of the die-casting mold filling process is improved, and therefore high-quality die castings compact in structure and excellent in performance are obtained.

Description

technical field [0001] The invention belongs to the technical field of die-casting molds and die-casting techniques, and relates to a die-casting mold capable of adjusting the state of a flow field in a mold cavity, and also relates to a die-casting process capable of adjusting the state of a flow field in a mold cavity. Background technique [0002] Die-casting is a precision casting method that uses high pressure to inject molten metal into a complex-shaped metal mold. Under the action of high-pressure pressurization and pressure-holding, die-casting parts with clear appearance, fine internal structure and excellent mechanical properties are obtained. . [0003] During die casting filling, the flow velocity and flow field state of molten metal have a very important influence on the filling effect and solidification quality. If the filling speed is too high, air entrainment and vortex are likely to occur, causing defects such as pores and oxidation inclusions in die-castin...

AI Technical Summary

Problems solved by technology

[0005] To sum up, the existing die-casting process generally adjusts the flow rate of the die-casting mold by adjusting the speed of the punch, and then indirectly adjusts the state of the flow field in the mold and the sequence of filling the mold. The state of the flow field in the cavity has a certain effect, but it is difficult to adjust the order of filling in different areas. When the molten metal fills the cavity, the filling effect is poor, and it is impossible to obtain die castings with high solidification quality.

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