Drilling Injection Mold Components: Ejector Pins, Guide Bushings, and Beyond
Cooling channels get most of the attention in mold deep hole drilling — I wrote about those here. But molds have other holes that need to be right, and some of them are harder than the cooling circuits. Ejector pin holes, guide pin bores, and insert pockets all have their own requirements. I’ve worked on all of them, and each type has tricks you learn by doing. Getting these holes wrong can ruin a mold that took weeks to design and thousands of dollars to machine. ...