Thwomp

The images show the concrete model at normal size and the smaller printed model was at 50%.

I modelled it with the mould in mind, so the face has a 5 degree draft angle on everything, apart from the straight outside edges.

Model dimensions are:
Height- 100mm
Width- 88mm
Depth- 56.5mm

STL’s include regular model and the mould:

• Thwomp
• Thwomp-Extended Base Points
  • Makes printing easier and provides more support for concrete model
• Mould
  • For printing with custom support added
• Mould Assembled
  • Shows how to assemble the mould
  • For scaling without custom supports getting in the way.

Thwomp mould:

• Print mould face plate at 45 degrees as in the grouped STL. It provided the best compromise between detail and overhangs. 
  • Can also work for the regular model as it removes need for suport in the mouth
• Print with brim to ensure bed adhesion
• Mould STL has custom support added. To Scale the mould use the parts in the assembled STL as they don’t have any added features. 
  • Supports are attached by a single line so can be removed with a craft knife.
• Registration notches prevent the face being installed upside down.
• You need to use mould release as it tends to grab layer lines even with the built in draft angle. I used wax, and used hot water to remove it from the concrete after.
• Hold the mould together with string or elastic bands.