i have one question why every time i watch one of your videos i learn something new?

true! love it! now have a laser cutter as wel for future tutorials ;)

@@MatthieuLibeert Wonderful

It's a special finish indeed, I like it as well :D

100% true! Only downside is I don't think 3d printed moulds are durable! Will test a 3d printed mould in future videos, as it's highly requested 😉

@@MatthieuLibeert You can check one of my videos. I used a 3d printed mould PETG coated and one with just release agent :) i'm new into resin works, so its not the perfect mirror finish.

@@MatthieuLibeert I understand why you'd think that!I used to think the same, but there is a way to print durable molds (2-3 perimeters with a larger nozzle, in my case a 0.8mm, plus more infill to avoid any compression during vacuum). Then I sand mine with 80 grit and coat with epoxy mixed with graphite (just something I found to work well for coating). Afterwards I just wetsand with 220, 400, and so on up to 1000, then polish real quick (basically the same process you went through for your plug/pattern). It is as durable as any epoxy/fiberglass mold is as I have infused and pulled a number of parts from mine and they still look perfect. Worst case, another wet sanding pass would refresh it back to tip-top shape! This has been my process for car parts. Nevertheless, I always look forward to your videos and value your opinion because you've been grinding for a long time way before I even figured my stuff out (still figuring it out actually...). Much respect to you.

Thanks 😁

Thank you!

it's on my todo list ;) should work! only thing that might cause some problems is the vacuum I guess

@@MatthieuLibeert that might be a good excuse to get a resin 3D printer!

@@MatthieuLibeert make the printed mold part hollow and fill it up with resin with some filler from the "underside" ;)

Already did that in a previous tutorial 😉 it's in my last videos making a tube 😉 '3d printed mould to make carbon fiber epoxy resin tubes'

Expanding on this, I’d love to see a 3D printed mold utilized with out-of-autoclave prepreg cured in an regular-ish oven that can run the prepreg heat schedule!

Glad it helped!

Thanks!

Works as well but not real carbon

If possible I postcure them, so in 90% of the cases yes

600g/m2 is general rule

Yes epoxy is a 2k resin that will cure under vacuum

Correct, you could clearcoat it if you want

@@MatthieuLibeert any downside to skipping an extra "sealing" coat? Or is it not needed at all due to the void free infusion method? (Just trying to understand as I've always been told to add an extra cost after hitting the weave, but I'd love to skip it 😅)

No not really needed as long as all the fibers are well infused with resin, and your ok with that finish

@@finfoil8544 unless the infusion resin you're using is UV resistant or the part won't see UV light (sun) then leaving the part bare is fine. Otherwise, coat it with a UV resistant clearcoat, as the resin will begin to breakdown and amber over time

Not sure if they ship to there, but try contacting them www.easycomposites.co.uk

Mostly yes

correct! but F1 and Aerospace are very specific industries that need that extra 1% To answer your question; I do think olympic grade and private plane can be done such way, I've read boeing and airbus are switching to out of autoclave as well but not sure. But if you want to make 95% perfect parts, out of autoclave should be fine as well!

@@MatthieuLibeert Thanks for the answer. No I am perfectly fine with less quality material and trade quality for cost and ease of manufacturing given it passes minimum requirements. Eg bike should not disassemble at 50km/h. Also such lesser carbon still should perform better than titanium or well structured aluminium or dural.

It doesn't mean it is some lesser type of carbon. The autoclave is used to minimize faults in the resin e.g. bubbles and increase the properties by achieving better saturation of the fibers with the resin.

@@jucaesar4961 Thanks for the explanation. I thought there some different type of chemical reaction and resin type which need a temperature to cook. Therefore I still can place carbon from the video in autoclave and increase it's quality.

@@vitalykononenko149 I am not too sure about that inference about the same resin being able to increase the properties through the autoclave. Generally, I would refer to specific datasheets in regards to which cure temperature and pressure should be used for the best properties. I only learned about this at a rather surface level during a second-semester course in my (bachelor) study of aerospace engineering.

correct! If you use the slow hardener from easycomposites you might infuse parts larger, did parts up to 10m² in the past. Some other brands of epoxy might even have slower resins. Another solution is to mix your resins in smaller batches and fill up the infusion cup when needed

@@MatthieuLibeert also depends on the structure of it. we have been doing this, design and 3d print then make cf for years, tons of problems. sometimes we have to use clay to re construct.

You could also have several resin inlets. They make yachts with infusion they just have a resin inlet every 2 feet down the center. And infuse it from center out

True!

Will see what I can do!

@@MatthieuLibeert perfect