# Sheetpress Experiments - Cassandra - 650 - EDC - RC1 - Conclusion

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## 10 mm

A one-stage process suitable for up to 10 mm thickness, though prone to warping effects.

### Conclusions

- Minor flatness errors were observed, typically 0.5-1 mm.
- Warping and material shrinking occurred, especially near corners.

### Recommendations

- Reheat at 140°C and press again to minimize shrinkage and warping.
- For a better finish, repeat the press with a harder surface.


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## 20 mm

A two-stage method offering better control at greater thickness.

### Conclusions

- The inclusion of intermediate dies reduced warping and improved overall flatness.

### Recommendations

- Incremental heating and controlled die insertion are recommended.
- Use presses with adequate pressure (20 tons minimum) for thicker sheets.

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## 30 mm

A two-stage method offering better control at greater thickness.

### Conclusions

- The inclusion of intermediate dies reduced warping and improved overall flatness.

### Recommendations

- Incremental heating and controlled die insertion are recommended.
- Use presses with adequate pressure (20 tons minimum) for thicker sheets.

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## 40 mm

A three-stage process for 40 mm sheets with significant handling challenges.

### Conclusions

- Height differences were observed, particularly on the die-engaged side (up to 5 mm).
- Air pockets and corner warping were frequent issues.

### Recommendations

- Implement intermediate reheating steps.
- Introduce controlled cooling phases to mitigate height inconsistencies.