*"Hammer Forged"* gun barrels are supposed to be really good. If you tap on the mold with a hammer while making the part you could call the process: *HAMMER FORGED CARBON FIBER* Calling it "hammer forged carbon fiber" has got to worse than "forged carbon fiber" to those people who think it should be called "chopped carbon fiber." The term *forged carbon fiber* used to annoy me since nothing is being melted together. The more videos I watch on making carbon fiber parts, the less the term *forged carbon fiber* annoys me. I think I personally prefer *forged carbon fiber* over *chopped carbon fiber* now. Thanks for another interesting video. I really enjoyed it.

@@ddegn I follow you on this one! It's a matter of giving it a name but so controversial in another way... at some point someone said let's call it an ice cream, other people said lets call it a frozen penguin stick :D the more adopted one made it ...

I just learned this term a few days ago so I could be off, I believe that length of CF stand would make this "milled" instead of chopped. So Forged/Milled carbon fiber parts. I'm going to have to make some resin molds for some parts now, great idea. Are the 4 small channels at the edges of the mold tapered and open to the outside of the mold? kind of like a sprue? I've been playing around with this quite a bit and I'm getting the hang of it. All my molds so far have been 3D printed but sometimes I destroy them accidentally when de-molding the part. Not that I've been making it easy for myself, most of my parts are thin (~3mm thick) and I'm using 3 part molds with a core. One trick that's worked for me, put the mold in the freezer before you break out the part. In my case the thermal coefficients of the mold & resin is different enough that a few times the forged part has slipped right out after cooling down adequately. Also, tip for filling the part fully with resin. Paint the mold surface with resin then alternate adding fibers and resin. its very difficult for thick resin to penetrate the fibers that's why the first few didn't infuse all the way through. Also your mold could have a deeper cavity so when the top is pressed down the resin and fiber doesn't flow right out the sides but instead is compressed like a piston. I believe the term "forged" should be "pressed" instead when its chopped/milled strands infused in resin, but apparently the term forged was used as a marketing gimmick.

glad you liked it! appreciate your comment on here ;)

I figured that the ratio of vertical and horizontal surfaces correlates with the ease of release. I did some test runs on simple shapes and they just popped right out of the mold. When I forged the more complex drone frame I struggled to get it out of the mold.

@@AlenHR With the mould release I mentioned or just in general? I think in general more draft would equal more friction during de-mould. But I even did some near neutral draft parts and that worked even. Was there actually draft on the parts? When I read 'complex drone shape' I can imagine organic shapes where you might perceive draft, but due to the curvature there actually is none. What did mess me up a few times when working with purely FDM printed moulds was underextrusion.

the hardest thing with forged is that you have no flanges to get the part out of the mould compared to resin infused parts. Thanks for the comments both of you ;)

thanks! it took me some time but glad I'm back to see all your comments! it's heartwarming reading comments of true fans from day one one here :)

Thanks! part 2 is online now as well ;) I have new video's lined up for the next to month now, with a video a week or sometimes more :D

thinking the same! the way of thinking is more like reinforced carbonfiber injection moulding like traditional injection moulded parts! your topic seems very suited to it indeed

it's a very controversial topic. I do like it, other say its not composites work, I see it more as an alternative to injection moulded plastic parts and believe carbon fiber can have a big role in this!

@@MatthieuLibeert I feel it almost bridges the gap between injection molded plastic and machining. The omnidirectionality that chopped fibers give I really think is underappeciated, and it's tough to be a better fiber than carbon fiber! Appreciate the reply, and hope you keep exploring this regardless of the controversy!

Thanks for your comment! glad you liked it, more video's are coming ;)

Glad to be back as well! I have bundled a lot of videos and most are edited so for the next two month I'll have a video a week or sometimes even more 😉

it wasn't under-extrusion but the Z-height nozzle being a bit to close, nylon is printed at 280°C without cooling and the nozzle was "scratching" the inner lines :)

Thanks :D

Thanks! more video's will follow ;)

haha it's a part of the process as well to try fail and learn and take that knowledge to other projects then :) Heatbed works, or oven might be better to evenly heat everything :D but I mostly like to let the parts cure at room temperature, then do a postcure to avoid exothermal reations and shrink or expansion

yes should work as well! any release agent compatible for polyurethanes should work. I find the spray the easiest way to apply :)

I don't have numbers but makes a big difference in theorie... PU can be brittle and the fibers function as reinforcement, comparable to glassfiber reinforced concrete for example

Thanks for your suggestion! Would be a cool thing to do! Will see if I can fit it into a video!

a mystery do be solved in part 2 :D

thanks for your comment! you are correct, mould geometry makes a lot of difference in the production of parts!

It's a cool process, you can compare it a bit to fiber reinforced concrete being more "commonly" used in the daily life.