WEEK 14 / Apr 26
Composites
The assignment
- read the material safety data sheet (MSDS) and technical data sheet (TDS) for the resins that you're using
- design and fabricate a 3D mold (~ft2) and produce a fiber composite part in it
For this assignment I used the mold from Week 12 that I used of the Molding and Casting project since I wanted to continue adding value to the Fab Lab Coffee bar.
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Materials to be used:
Fiberglass
Polyester Resin (PP38-MAQ)
Catalyst for resin (K-2000)
De-molding spray
1" Brush
Measuring glass
Scissors
Clean Silicon Mold
Mixer
1. Measure the Fiberglass to the size of the mold.
2. Divide the piece of fiberglass into layers
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3. The area of the fiberglass helps calculate the amount of resin to be used; in this case 80 ml of resin. Clean the silicon mold and apply a layer of release spray on its surface and let it rest for 1 minute.
4. Clean the silicon mold and apply a layer of release spray on its surface and let it rest for 1 minute.
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5. Following the manufacturer's specifications, to obtain 100 ml of 1.5% mixed resin, add 25 drops and at 2.0% add 33 (depending on temperature and climate), in our case we take the measuring glass with 80 ml of resin, add 20 drops of catalyst and mix.
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6. Using the brush apply a thin layer of resin and we add a layer of Fiberglass. Spread the the resin mixture on the layer, repeat this step until achieving the desired thickness.
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7. Remove the fiber from the mold once it has hardened.
Oscar Velázquez
