Since the dog days of the early 1900's, when Henry Ford was ram-rodding the idea of an "assembly line", while his customers were asking him for "faster horses", OEM's (Original equipment manufacturers) have sought out Machine Shops as their primary source for castings. It made sense, the machine shop was the last stop in the line, so from a material flow standpoint, the OEM buys from the machine shop, and the machine shop sources the castings to a foundry.
Permanent mold casting refers to the fact that the same mold is used for each casting cycle, rather than being broken away after each use as with sand casting. Although the mold is not truly “permanent” — as with any process and tooling, it will degrade over time and eventually need to be refurbished or replaced — the name applies to the continually used nature of the mold.
Categories: Permanent Mold Casting