For "Punch pin ejector pin", generally, high-quality carbon steel (such as 45 steel), alloy structural steel (such as Cr12MoV) and the like are selected as the manufacturing materials. These materials are of high strength, high hardness and good wear resistance. During the manufacturing process, the punch pin is first preliminarily formed through precision forging or cutting machining, and then heat-treated to improve its performance; the process for the ejector pin is similar. In terms of application, in stamping dies, the punch pin stamps on the material according to the design. After completion, driven by the ejector mechanism, the ejector pin smoothly ejects the workpiece from the die cavity. It is commonly used in die operations in fields such as metal processing and plastic product molding.