Fixing uncured resin

[scvrobeson]

Hey everyone,

 

I'm still very new to 3D printed bits. I've been looking over my Lukgraph Grumman Goose kit again, and I noticed that the engine bearers were pretty warped. I thought I might be able to straighten them out by just using a piece of brass rod of the right diameter, but all it found was a bunch of liquidy resin inside. I'm guessing this is because the part wasn't fully cured before being packed and shipped out.

 

What is the fix here? Since they're engine bearers, they are very important parts to the build. Can the excess resin be cured and straightened, or is it off to Lukgraph to ask for replacement parts?

 

 

Matt 

[denders]

I think I would request new pieces.

 

That being said, I don't know what the pieces look like. Since you mention what sounds like just pushing a brass rod into an existing opening and finding resin inside, is it a hole/space already in the part? If so, perhaps it is just uncured resin that wasn't washed out of the hole properly?

[scvrobeson]

1 hour ago, denders said:

I think I would request new pieces.

 

That being said, I don't know what the pieces look like. Since you mention what sounds like just pushing a brass rod into an existing opening and finding resin inside, is it a hole/space already in the part? If so, perhaps it is just uncured resin that wasn't washed out of the hole properly?

 

Part looks like this, they're the two in the back middle-

 

 

 

Matt 

[BiggTim]

I agree with Dave, I'd ask for new parts. If you want to cure them, just put them in the sunlight for an hour or so, and they will harden right up, but that won't solve the bent parts.

 

T

[RCPlym]

New parts would be my first option. Uncured resin will eventually leech out of the parts and make a right mess, but as BT said sunlight will 'cure' the resin.

 

If you get uncured resin on your skin, make sure you wash it off as soon as you can. There's plenty of somewhat nasty stuff in it that can cause skin reactions.

 

As for 'bent' parts, hot water will often return the part to its original state, but don't attempt that if there is uncured resin.

 

 

[Timmy!]

Rinse them with isopropyl alcohol with a dropper or syringe to flush out the uncured resin.  Place them in a glass container with cold water and place in the sun.  If you have a UV flashlight or other light source you can cure the parts that way too and direct the light in the interior of the part.   
 

Timmy!

Edited June 4 by Timmy!

[RCPlym]

48 minutes ago, Timmy! said:

Rinse them with isopropyl alcohol with a dropper or syringe to flush out the uncured resin.  Place them in a glass container with cold water and place in the sun.  If you have a UV flashlight or other light source you can cure the parts that way too and direct the light in the interior of the part.   
 

Timmy!

 

That will do it the proper way.

 

Strange that it is there at all in parts with thin sections as those appear to be, unless they are designed to take metal rods for reinforcement.

If that's the case, considering the quality of Lukgraph kits I have, I am quite surprised the parts escaped into the wild...

[scvrobeson]

1 hour ago, RCPlym said:

Strange that it is there at all in parts with thin sections as those appear to be, unless they are designed to take metal rods for reinforcement.

If that's the case, considering the quality of Lukgraph kits I have, I am quite surprised the parts escaped into the wild...

They are intended to have metal pins inserted into them. I think this was the very first run of the kits, so things might not have been fully dialed in yet.

 

I'll give Timmy's plan a try to see if that helps them, and if not, I'll contact Lukgraph for a replacement set when I order their next release.

 

 

Matt 

[RCPlym]

16 minutes ago, scvrobeson said:

They are intended to have metal pins inserted into them. I think this was the very first run of the kits, so things might not have been fully dialed in yet.

 

I'll give Timmy's plan a try to see if that helps them, and if not, I'll contact Lukgraph for a replacement set when I order their next release.

 

 

Matt 

 

Definitely give the isopropyl a go, otherwise the resin will cure in daylight (even on a cloudy day!) and the pins won't fit.

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