- Save drawing as a STL
- Open PartWorks 3D on ShopBot
- Load the STL file
- Enter units and tool size because STL file does not
- Enter scale, for example, 70%
- Enter material size
- Set zero on surface that isnt moving
Tooling: 4 (four) fluted .125 inch endmill
Cutting Parameters: Passdepth: 4.0, Stepover: .635,
SpSpeed: 12000, Feed: 60, Plunge: 10
Toolpath: Rapid: 2.0 mm, M-Allow .5, ZLevel: Raster X
4 (four) fluted .125 inch ball endmill
Cutting Parameters: Passdepth: x.x, Stepover: .xxx,
SpSpeed: 12000, Feed: 60, Plunge: xx
How much mold rubber do I need?
- Using PMC® -121-30 Dry - Easy To Use
- h * w * d = VOLUME (rubber needed to make
the mold). Then divide the VOLUME by the
specific volume yield of the mold rubber
(constant 963 cm3)
- (h * w * d)/ 963 cm3 = Weight in kg of
PartA and PartB need to make mold
- (8.8 height x 9.0 width x 2.0 depth) / 963
cm3 = Approximate Weight of Product Needed 0.16
Kg of Part A and 0.16 Kg of Part B
Smooth-on has a free
iPhone applicationto calculate how much PartA and
PartB you need.
Smooth-on has the same
Smooth-on has an explanation
of this calculation on their FAQ
Mold design: While designing mold
think how the cast material will flow into the finished
mold. Place pouring holes to allow the best flow of
Wax is brittle a small piece of the
design broke off, for example the characters nose.
However the finish pass had enough to cut a small
Know what end-mills are available
before creating file in PartWorks. The 1/16 inch ball
nose end-mills had a 1/4 inch shank that would have
skimmed the interior of mold therefore making it
unusable for my design.
End-mill stick out was to short
rough end-mill kissed the top of the material when
doing the peg holes.
Amount of mold release should be
light spritze which is then brushed with soft brush, a
few minutes later a second light spritze.