Yeah I got mine a few days ago, I had to wait 1.5 - 2 days with my browser open.
Sent from my iPad using Tapatalk
Same thing with me. Ordered mine today.
Yeah I got mine a few days ago, I had to wait 1.5 - 2 days with my browser open.
Sent from my iPad using Tapatalk
Well, your original statement didn't have it spec'd quite that narrowly.
Well, your original statement didn't have it spec'd quite that narrowly.
Just how long do you plan to keep that SX-350/26650 design of yours under wraps?![]()
I normally dont treat the WSF internals. The tolerances and interfaces are too tight. But the material is porous and can possible get stained. So I did a little experiment tonight to see if they could be sealed and do so without compromising all the holes, slots, grooves and rails. I put together two fresh internal units. I lightly sprayed all the parts on one unit with Krylon #1311. I did two coats. The first coat sunk in to the material, The second coat laid on top of the surface. I didnt pool the acrylic on the second spray, it was more of a misting. This acrylic spray is one of the thinnest coating surface treatments I have use. It added basically zero thickness to the parts and everything assembled perfectly after sealing the material.
I did a quick test by placing a drop of water on each assembly, it was the juice tube side and I tilted them slightly to gauge pooling vs. run off vs absorption. It worked very well. Sealed parts on the left vs unsealed on the right.
Treated - Pretest material - no real noticeable difference in material.
One drop of water placed on each part- Treated part pools water, untreated absorbs instantly.
15 second after the water was dropped. - Treated spreads out but stays on the surface, un treated water spreads through out the part.
Close up on the last pic... Shiney spots are the water reflecting light. Notice the bottom half of the treated part isnt wet...
Whats all this talk about sx350/26650 size devices? I am looking to downsize...well maybe I need to start a new thread.
If Gdeal designs an sx350 mod i would be really ......, last week i picked up a PI mod for a huge amount of money![]()
What kinda modding 'round things' is that? Pull that dremel outta that holster and show us what you're made of...... I will not use a dremel, but will hand file them to avoid any inadvertent slips.
Your issue reminds me of an incident from my days at Polaroid, in the 1980s. A Master's chemist whom I knew slightly from R&D came up to me in the library, where I was reading technical journals (i.e., snoozing), and asked in an offhand way what I thought might happen if one mixed ethylene diamine and methylene chloride. Without thinking (i.e., waking up) very much, I speculated that in small quantities, they'd probably just sit there indefinitely; in a really large volume, they'd probably do nothing for a few hours or days, then explode. He nodded and wandered off. I found out a few days later that he had moved to scale-up, had done the deed in question in a 600-gallon steel reactor, and that it had blown the vessel apart. (No injuries.)
I'd need more information, but I think you're running into a similar problem. CA-type adhesives are oxygen-inhibited and moisture-accelerated. So a blob in air will just sit there. but when pressed thin and moisture added, it cures rapidly. hence the toilet seat/doorknob trick. Acetone is a very hydrophilic polymer - you can look up its moisture content at various RHs - and your "stick" might have brought in enough to start the reaction. With such a large volume/surface area ratio, the exothermic reaction could then boil the acetone. Things that are OK at drop scale don't necessary perform the same way in beakers.
Hazing: there are several possible reasons. The simplest is water. You may have tried pouring an acetone solution of cellulose acetate (or other plastic) into water to get a gauzy precipitate. (The process is called phase inversion, and it is how ultrafilters and other useful objects are made.) CA monomer/oligomer is probably much more soluble in wet acetone than the polymer, hence may go hazy as the reaction proceeds. Moisture could come from the solvent - tech grade acetone can be very wet - or from the atmosphere on a wet day. Is the issue seasonal? It's easy enough to gte dry acetone (or dry it yourself with molecular sieves), but your process may still only work reliably at low RH.