Die casting is widely used in automotive, 3C products, hardware parts, and other fields due to its advantages of high efficiency, high material utilization, and high forming accuracy. For specific die-casting parts, corresponding die-casting molds need to be designed, and the shell needs to be formed using side gate die-casting molds. The design and manufacturing of side gate die-casting molds are key to ensuring the quality of aluminum alloy die-casting parts. Taking aluminum alloy shell components as an example, this paper introduces the design of die casting molds for aluminum alloy horizontal cold chamber die-casting machines.     A process analysis was conducted on an aluminum alloy die-casting part of a certain shell, and the structural design of the die-casting die for a horizontal cold chamber die-casting machine was introduced in detail, mainly including the selection of parting surface, pouring system design, side core pulling design, and demolding mechanism design. The working principle and structural characteristics of the die-casting die were explained, providing reference for the structural design of the die-casting die for a horizontal cold chamber die-casting machine.    The shell structure is shown in Figures 1 and 2. The casting requires high strength, light weight, and operates in high temperature and humidity environments above 100 ℃. Therefore, YL102 aluminum alloy.....