What is a Ejector pin?

"Ejector pins are parts used in molds such as resin molding, and are parts for taking out products. Resin is poured between the upper mold and the lower mold, and when the resin is cooled and hardened, the product is taken out by the protruding rod coming out to take out the hardened product when the upper mold and the lower mold are separated. The protruding rod is called the ejector pin. The product cannot be extruded from the mold without the ejector pin. The ejector pin is set to return after being pushed out, otherwise the mold will break.

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