PRECISION MOLD PARTS/SPARE PARTS

https://www.fangling-precisionmold.com/products/precision-mold-parts-spare-parts/

This shape of a mold is predetermined by a mould, a block that has been hollowed out. Aluminum, steel, alloys, and copper are the most common materials used to build it. It's made up of various other mold spare parts, too. It includes lifters and ejectors as well as guides and bushings in the form of alignment devices and pins on the base.