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I took a mold making workshop this past spring and wanted to see how I could combine 3d modeling and mold making techniques.
While modeling, of course, keep in mind the build volume and resolution of your 3d printer.
I drew a box around the object in Rhino, split both the box and object with two planes, then joined the appropriate pieces into this three part mold. ...
Print your mold...Then set up a work station outside, or in a room with proper ventilation.You will need the following:BucketClampsPacking tapePaint stirrersLatex glovesSpray releaseLarge plastic cupsPoly PT Flex ...
Spray everything a couple times, including around the mouth of the mold.
Assemble the mold and cover all crevices with tape to help prevent leaks.
Clamp the mold as tightly as possible.
Pour equal amounts of part A and part B into separate cups. Take extra care in measuring.
Mix parts together, then pour mixture into third cup and mix once more. This ensures an even distribution.
Position your mold over the bucket to catch drips. Prop it up to make level if necessary. Let the rubber cure for at least one hour.
This may take some work. Use a screwdriver if needed.
There is always something that could be improved upon. Personally, I think I should have spent more time orienting the grain of the print!
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