3-D printed stock failure

[davelarson]

Hi everyone, I got this cool adjustable 3-D printed stock on eBay. The listing is closed now. Anyway the seller sent me two for the price of one ( $54 ) because of how fragile they are. You can see in the picture where the machine stitches it all together, problem is that it left weak spots and both broke in the same place. I’m going to be reinforcing it somehow because it is a great idea and it makes the HW44 into a cool little carbine. Other than the weak areas this is a great idea. I just can’t believe that he’d put them out there before correcting the problem. Just a heads up on my first 3-D printed purchase. The plastic is plenty strong everywhere else that it printed well.

 

[biohazardman]

Oops well looks like the gun is broken now. You can send it off to me and I will dispose of it in an ecologically green manor. ;^) Love the gun but find it hard to purchase one as I modded a 2240 with an FX barrel, aftermarket breech and regulated 13cu tank. It shoots with a bit more fpe and puts them through the same hole at 25 meters. Actually I just use that as an excuse cuz I am jealous and will still probly have to have an HW someday.

I wish you luck with your fix and have fun wit the gun.

 

[Hepotter]

JB Weld - Steel. Strongest epoxy I've found in the last 50 years. Bonds well to plastic, and sets up hard as hell. Paintable, comes in one stick putty form. Squish until even color, apply, smooth surface, let dry 24 hours. After that, you can drill, cut, sand, paint it...I used it on my SPA 700. Put a butt stock and hand grip on. It's the real stuff for things like this.



Uncle Hoot

 

[davelarson]

Thanks Hoot! That’s exactly what I’m going to do. Biohazardman, the 2240 with the FX barrel sounds great, I’d definitely like the extra power.

 

[BH]

Bummer, I had traded messages with the seller to get one. I guess I’ll hold off till some changes are made. Thanks for the PSA.

 

[MartinT]

From the looks of it, it’s printed from PLA. That glues really easy with CA glue (‘superglue’ for non RC modelers). Super strong bond and works almost immediately. Especially if you spray it with accellerator after applying the glue.

 

[dan_house]

been working on a stock similar for a differnt pistol.



The area that failed on Daves gun has been an issue for my designs too..... more infill and thicker wallls....... 

 

[Michigander]

If you can get your hands on the CAD model, or make your own model, you could go to a provider of 3D printing services and have your stock made using a process suitable for functional prototypes. When I last was involved in this sort of thing we were having prototypes made in Nylon using the SLS process. Surface finish was a little rough, so we would lightly sand and then paint. When we were done they looked great. This article explains the different processes.

https://formlabs.com/blog/fdm-vs-sla-vs-sls-how-to-choose-the-right-3d-printing-technology/