
While jumping through Ebay's "similar items" section within listings, discovering "wood barrel ice-baths", I found out that there's one semi-common HDPE barrel that is taller than the 220L, blue and doesn't use a galvanised metal clamping ring: the 290L barrel. Like the previous barrel, this barrel was acquired to store things outside, thus it's beneficial that the ring is made out of plastic. For safety with a 450/405nm laser, blue or white is more ideal than red, dark grey or black. It's also got 4 convenient indents to carry the barrel.
Cleaning the barrel
The one I found happened to be local; the going rates for both 220L and 290L seem to be sub £40/ea when collected instead of delivered.
The black HDPE parts and the barrel's outside was scrubbed with a sponge and the inside was mopped:



Modelling
I let it dry while I measured things for 30 minutes, mainly the height. I know it's taller than 1110mm but maybe 1120mm or less. Nominally, I got 1115 - 1116mm. Then I went to the other side of the garden to try and get a full-size image as orthogonal as I could so I could import the image in Fusion:

Taking a picture from so far away highlights how surfaces on the barrel aren't as straight as they might appear when closer. I left the lid on because I imagined that I could use its height as a reference, but now I think I'll just measure the height of the barrel's straight section.
I then spent over an hour modelling the lid:


It took ages to determine where fillets started and ended, and I had to use some 48mm tape as a spacer to be able to use my calipers to measure the wall's thickness and height. It's rare times like these where I wish I had a 3D scanner. Fusion's weight estimate is 750g and the real one is 100g less, and I believe some of that discrepancy is because I don't know the cross section of the seal. The HDPE lid alone is reported to be 600g in Fusion.
I have yet to model the other 2 parts.
Trivia
I also tried using Wispr Flow for this log, but ran into similar issues as when I tried Windows Dictation over 2 years ago. I have to think of the sentence, send it to my mind's Speech Processing Unit, say the sentence, read the sentence and correct it. The first 2 steps is the bottleneck because I don't think of sentences synchronously, so I generally have to think of the entire sentence in my mind, recite it, and then say it.
Maybe this workflow is a lot better for people who can literally just say what's on their mind? It's still better than Windows dictation because at least I don't have to worry about punctuation and the default CTRL+WIN shortcut is a lot less cumbersome than WIN+H.
[July 30]
Modelled the screw ring


Then I had to do some tricks here and there to properly design the custom thread:


kelvinA
Discussions
Become a Hackaday.io Member
Create an account to leave a comment. Already have an account? Log In.