Die-casting die for pump bodies

Abstract

The invention relates to a die-casting die for pump bodies and a method for manufacturing a pump body by using the die-casting die. The die-casting die comprises a fixed die frame, a fixed die, a movable die and a movable die frame, square slide rails are arranged between three side walls of the fixed die frame and three side walls of a corresponding fixed die groove respectively, a left core extracting device and a right core extracting device are mounted at two opposite slide rails respectively, a lower core extracting device is mounted at the other slide rail and comprises a fixed frame, an oil cylinder is fixedly connected to the fixed frame, the end of a pull rod of the oil cylinder is connected with a lower slider, the front end face of the lower slider is fixedly connected with a lower core block, a running gate is arranged at the top of the lower slider, a runner gate butted against the running gate is arranged on the rear side of the top of the lower core block, and the front end face of the lower core block is fixedly connected with multiple core rods. The die-casting die for the pump bodies is high in production efficiency, less prone to generation of air holes of the pump bodies, and low in production cost.

Description

technical field [0001] The invention relates to the technical field of die-casting molds, in particular to a die-casting mold for a diesel pump body. Background technique [0002] As the core component of the diesel engine, the quality and performance of the diesel pump directly determine the performance indicators of the diesel engine. The diesel pump is mainly composed of pump body and other components, and the reliability of the quality of the pump body also directly affects the reliability of the diesel pump. At present, the pump The body is mainly obtained through the casting process. Because in the casting process, the liquid metal alloy liquid is mainly injected into the mold cavity by its own gravity under the condition of no pressure, and the pump body is obtained after the metal alloy liquid is solidified. Although the pump body obtained by this process Shrinkage cavity is not easy to appear in the body, but the production efficiency of the pump body produced by ca...

AI Technical Summary

Problems solved by technology

[0002] As the core component of the diesel engine, the quality and performance of the diesel pump directly determine the performance indicators of the diesel engine. The diesel pump is mainly composed of pump body and other components, and the reliability of the quality of the pump body also directly affects the reliability of the diesel pump. At present, the pump The body is mainly obtained through the casting process. Because in the casting process, the liquid metal alloy liquid is mainly injected into the mold cavity by its own gravity under the condition of no pressure, and the pump body is obtained after the metal alloy liquid is solidified. Although the pump body obtained by this process Shrinkage cavity is not easy to appear in the body, but the production efficiency of the pump body produced by casting is relatively low, and the machining allowance of the pump body obtained by casting is relatively large, and the energy consumption in the production process is large; in order to improve this defect, the use of The pump body is produced by the die-casting process, because the liquid metal alloy liquid will be exerted a large pressure during the die-casting process, so that it can be quickly filled into the cavity. Although the pump body obtained by this process has a small machining allowance and high production efficiency, the pump The compactness of the body is relatively good, but due to the high injection speed of the liquid metal liquid, the air in the mold cavity is not easy to be discharged in time, resulting in the problem of air holes in the pump body obtained by die casting, especially the lubricating chamber of the pump body and the diesel chamber. When the diesel pump is working, it must be in a non-conductive state. Therefore, if the lubricating chamber and the diesel chamber are connected due to air holes, the pump body must be scrapped. However, the existing technology has not been able to solve this defect well, which seriously affects the die-casting. Application of technology to the promotion of manufacturing pump body

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