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nurtext

Super Simple Silicone Sock Mold for E3D v5 Clones

by nurtext Mar 25, 2018
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this is a great design! too sad it's for the v5. I'd love one for a v6! the cartridge style

LOL. My guess is that there are no makes on this because nobody knows where to get the "special silicone" that will work and don't want to buy a dozen brands in hopes of stumbling on the right one. Most silicone isn't going to flow into this well enough to work and from one post it sounds like diluted silicone isn't going to either. Soooooo, yeah.

Edit: I like a good mystery. So, I attempted this mold using a locally sourced RTV silicone. Sounds mysterious doesn't it? Don't worry though, I'll report back my results and even give you a link to the silicone I used as well as the process I tried. Realistically though.....I don't have much hope that its going to turn out well.

It's no mystery at all. I got my 2-component silicone from a large manufacturer here in Germany. I recommend doing some research instead of complaining and telling everyone this is more myth than truth. I've made dozens of silicone socks using my mold and they work very well I can tell you. Besides that: I don't release things to the public only in hope of a number of makes shown on this page. The majority of makers is not going to tip, leave a thanks in the comment or even make a photo of the things they made.

So please do myself and others a favor and stay away. Cheers.

Well of course your socks turned out well....you have the "special silicone". I didnt imply that your design was a myth....I simply pointed out that it requires a special silicone that you chose not to reveal or even give advice on procuring. Instead you ask people to scour the internet in hopes of finding a silicone that you don't even give requirements on.

Believe it or not, the "special" part about "my" silicone is the temperature resistance. Nothing more, nothing less. It still is a silicone, 2-component as I stated multiple times. As I mentioned before: Do your research, easy to find and obtain. I won't give any more detail on this. Period.

Leaving my notes here for something that didn't work. Hopefully this will save other people some trouble...

Given I can't find two-part silicone locally I decided to try Permatex "Ultra Copper" maximum temperature gasket maker. This is a silicone sealant intended for making engine seals and gaskets and is rated to 700F / 371C.

I used mineral turpentine to thin it down to a runny custard-like consistency and trickled it into the mold with a toothpick. When I demolded I discovered that it still wasn't runny enough to make it to the bottom of the mold and, as expected, it shrank as it set - the turps evaporates off so it loses some volume.

I'm going to have to source some two-part silicone from Europe (Germany) by the looks as the ones I found in my country are only rated to 200C and I need it to print PET-G at around 240-250C.

If someone has a known-working brand for this I've love a PM with the info, thanks!

When you say silicone, do you mean silicone sealant or is there something else?

Sealant isn't made for high temperature applications. You'll need to use a 1- or 2-component high temperature silicone (at least 250°C if you plan to print ABS/PETG)

I've tried this with one-part high temp silicone RTV (both thinned and unthinned), but I was unable to open the mold after curing without destroying it and the silicone. I tried using Smooth-On Mold Release and degassing in a vacuum chamber - no luck. It seems the silicone sticks to the mold too well.

I'd try the 2-part platinum-cure silicone, but I haven't found one with a high enough temperature rating.

Is there some secret technique I'm missing?

I made 3 socks in total using my mold. Never had any problems using 2-part silicone.

Looks promising. Does that work on the standard v5 hotend that ships with Anycubic's I3 Mega?

Indeed, it does work. I used a 1 component silicone that is good for up to 300C. Found that in the car repair domain.

Can you link a specific product that worked? I really don't feel like researching 5000 different silicone mold compounds to try to find the right one.

I used a 1 component silicone that is used in car repairs. Brand K2. Is good for up to 350 degrees C.

what did you use to avoid sticking?
this brand is adhesive, isn't it?

I think any separating agent will do. I applied a spray that I use for silicone smoothing. Soap and water will do, I am sure.
The mold needs to be covered (inside and outside) - that's it.

Search for 2-component RTV silicone. Usually used for tin casting and temperatures up to 450 °C.

Comments deleted.

Super instruction and really simple to print/build...
So I got great result at first try.
THANK YOU!

Welcome, glad you like it :)

Beautiful detailed instructions. I look forward to trying!

Thanks, can't wait to see some makes! :-)