Haven’t posted any prints in a while. Hoping this will work for an archery arm guard. Supplementing one hobby with another. Now onto some sanding (perhaps an acetone vapor bath), painting, and sewing. If this turns out to be too abrasive, I’ll need to venture into flexible filament, though I doubt I’ll be able to get the detail. Thoughts?
Printed at 0.3 layer height with a DaVinci 1.0. Took about 3 hrs.
Body - armour can be made from Kevlar and Dyneema . A new process of gel electrospinning can produce gel spun polyethylene nanofibers . The material combines strength , stiffness and toughness according to researchers . The concept of using thin interleaved layers of different materials could be useful for helmets and protective clothing .
Attachment of body - armour should be with Velcro .
An archery arm guard isn’t body armor, fwiw.
Debatable .
I think flex filament should be able to handle that level of detail, but I’ve not had much luck with its longevity under actual usage conditions.
@John_Bump Interesting. Does it just stretch and break, or dry out and crack?
@bernd_slemmen lol. Once you figure out how to 3D print this kind of body armor let me know. You can achieve the same thing with 2 layers of graphene also (studies show).
If you want the file I can make a thingiverse account…but you may want to scale things down a bit. That’s 7.5 inches long and 3 inches wide. I have monkey arms. The slots are 1.25 inches long to accommodate for some elastic or Velcro straps.
Don’t use an arm guard. Fix your technique (rotate your arm so that the elbow is out).
@Neal_Grieb : delamination between adjacent strands on one layer. Layer-to-layer sticks well, but within a layer it’s been kind of terrible.
To :- Neal Grieb . Yes . Carbon fiber , Graphene , fibreglass matting and other materials are obtainable from existing industrial suppliers . Molds are 3D printed . Armour components are molded . The components are assembled . Finishes are applied to the assembly . Flexible Silicone Rubber Molds are preferable . Rubbery molds can be 3D printed .
@Ross_Bagley even the pros wear arm guards. I agree that you shouldn’t usually need one, and that a slight graze isn’t going to hurt too bad. On the other hand I kinda think it looks cool. I’m in this mostly for the style points.
@Neal_Grieb This. Also if you are wearing the arm guard and are in a place where you are learning and sometimes striking your arm, that very concept that you MIGHT will affect your form, cause frustration etc. Having a thing to settle the mind to allow you to not worry on release and maintain a proper form isn’t a bad thing.
I do think the design is quite cool. And I did hit my arm on my first release. My teacher used that experience to show me how to hold the bow and never hit my arm again. Your bow arm will have more strength and isometric stability if you keep your elbow up and don’t let it drop. Also, your arm can’t be in the path of the bowstring when your elbow is up.
The idea of being afraid of hitting my arm didn’t occur to me once I knew where my arm was supposed to be.
Don’t use this. There are protrusions going backwards that will catch the string and cut into the guard splintering it and hurting you.
@Michael_Scholtz what are you referring to? Do you mean on the string rebound? The part is nice and smooth. Basically a flat plate though a bit bulbous at the back end.
I’m not sure how bad your form is, but as mentioned earlier, any slap would be minimal. This thing may be thin, but it is sturdy and has a honeycomb infill. If you are splintering things on your arm you have larger issues.
Also, If anything I’m more worried about damage to the the bow string.
I saw something similar here:
How is this different?
Finally got through the 24 hour no publish period on thingiverse…not sure what that is about, but here is the file:
