LESSON 9.1 · 2:01 · CHAPTER 9 · TOOLS, RECYCLING AND WHAT'S NEXT
Tool CTE must match the part
Tool and laminate grow differently on the way up to cure, and a printed tool grows very differently in each direction.
Predict · at 0:35 in the video
A two metre tool for a carbon epoxy part heats up by 100 degrees. The laminate grows two millionths per degree. How far off is aluminium at 23, a printed carbon fibre PC along its beads at 7.8, and the same tool through its layers at 72?
The worst is fourteen millimetres. The laminate grows 0.4. Aluminium is 4.2 millimetres off.
Further reading
This course is our own. These books go deeper.
- The economics of Big Area Additive Manufacturing, Post et al., Solid Freeform Fabrication Symposium, 2016
- Additively manufactured carbon fibre-reinforced composites: state of the art and perspective, van de Werken et al., Composites Part A, 2020
About the numbers
Simulations in this lesson are our own. Where a number rests on an assumption or a single source, the video marks it with an asterisk and says where it comes from.
Up next · 9.2 · 1:44Printed walls leak