Practice question · Numerical answer
What is the minimum number of rigid mould pieces needed for a form with no undercuts at all?
Hints
- A single rigid mould cannot be withdrawn from anything with volume.
- Two.
Show the answer
2
Why
Two. Even a form with no undercuts needs the mould divided, because a single rigid negative enclosing a volume has no direction in which to come off. Two is the floor, and the count climbs from there with the undercuts.
Practise Moulds I: Typology
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