Discussion
Consider the following statements about die pressing.
1. Wall friction produces a density gradient through the depth.
2. Double-action pressing reduces that gradient.
3. Springback means the compact is smaller than the die cavity.
Answer: D
The first two are correct. The third has the direction wrong, since elastic recovery makes the ejected compact slightly larger than the cavity that formed it. Tooling is sized from the measured recovery of that powder.
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