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KOSTAS - 9/12/2018 6:02:02 PM

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Lester Populaire - 5/30/2018 9:24:47 PM

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scottracing - 5/30/2018 11:14:56 AM

what layer height did you use on the PLA print? And did you sand it prior to the first coat of primer?

The finished part looks brilliant, is that a flax/hemp material you made the part from?

I usually print with a Layer height of 0.15 to 0.2mm and give it a light sand to get rid of small bumps where a new layer started and any things like that. Then usually two coats of heavy filler and one coat of finishing filler with wet sanding is enough to get a good finish.

The part is made from Bcomp's ampliTex 5040 fabric.

0.15 layer height !!!! How many hours did it take you  to print this bar mold ?

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KOSTAS - 9/13/2018 4:23:53 PM

one question : By printing my mold in PLA is it possible the exothermic reaction of curing resin to reach 60C or above that could soften my mold and ruin my cast? How can i suppress the rising of curing resin temperature in order to avoid such a possibility ?

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Lester Populaire - 5/19/2018 8:06:17 AM

I just have some pictures of printed positive moulds on hand and thought i would share them. printed in PLA on a Prusa printer.


second layer of spray filler


sanded to 800 grid


with tooling gel coat


finished mould (made with vacuum infusion) and the first part


first part close up. Finish straight out of the mould.


Another project with the bar and the lower mould have printed to get an accurate split line exactly in the center of the bar.


this is how the first mould have is made, then the lower part is removed and a composite mould is made instead.


And a close up of the finish. getting a really smooth finish and decent dimensional accuracy is really easy even with a relatively big layer height.

I hope this helps.
Cheers, Reto