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The difference between casting and die casting, is that casting is done with a sacrificial mold at lower pressures, die casting is done at high pressure using a
by tristor 4y ago
The difference between casting and die casting, is that casting is done with a sacrificial mold at lower pressures, die casting is done at high pressure using a tool die that is reused multiple times. Die casting is essentially stamping out a part at high pressure from semi-molten material, vs liquefying material to be poured into a low pressure mold.
Die casting has a lot of advantages, but is generally much more expensive as a manufacturing process, and that expense scales exponentially with part size.
"Forging" is mostly a marketing term at this point, depending on the type of product you're talking about, but it generally refers to a combination of die casting and CNC machining.
- jameshart 4y agoIsn’t sheet metal ‘stamping’ a forging process? I’m not sure it only has a marketing meaning these days. But then the only time I see stuff marketed as ‘forged’ these days is typically ‘drop forged’ tools, and I realized I also have no sense of what process ‘drop forging’ might involve. I guess I vaguely assumed some sort of drop hammer?
- seb1204 4y agoNot sure about forging being a marketing term. Forging in my understanding referee to the raw steel bring red hot and then manipulated by pressing, rolling or hammering into a desired shape. This often requires multiple cycles of reheating and manipulation. This is then often followed by CNC machining. I also recall that grain structure is different in forged materials compared to casting. A casted part will often be machined but not reshaped by e.g. hammering.