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Some help with stove bottom

Posted: Thu Apr 03, 2008 7:28 pm
by Tony
Hi all,

things have been quiet on the forum

I have been playing around with redesigning my volcano stove and I am having problems producing a flat bottom from the base of a small drink can.

I need a flat bottom to increase the volume and to allow the heat transfer pin to heat the last of the alcohol. I have posted some pictures of the not very nice bottom and how I make to cone top but I am struggling with ideas for a flat bottom.

As I am relatively new to making these small drink can alcohol stoves, I am wondering if any one on the forum has any ideas or could point me to how others have solved this problem.

Thanks

Tony

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Ugly bottom
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bottom before pressing
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tools to make cone
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pressing cone
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finished cone
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finished stove

Re: Some help with stove bottom

Posted: Thu Apr 03, 2008 8:23 pm
by DaddyMnM
Tony,
You have tried one of the two things I have seen, pressing the bottom to make space. The second thing I have seen is to use the top of the can. Pierce a hole in the side of a can and empty contents into a cup. Then carefully remove pull tab by turning 180 degrees, gently lift and nip with dikes.
Cheers!

Re: Some help with stove bottom

Posted: Thu Apr 03, 2008 8:48 pm
by Pure Mahem
To press it out try using a large round item like a Dowel Check out Darren's post he just did it on one of his stove bottoms to increase the fuel cappacity. might try a piece of steal rod look for a chunk that is the diameter of impression you want to make. or you can improvise using a capped piece of heavy pipe. :mrgreen:

Re: Some help with stove bottom

Posted: Thu Apr 03, 2008 9:07 pm
by DarenN
Pure Mahem has it right Tony. i'm using a piece of 1 1/4" aluminum roundstock as a mandrel to flatten my can bottoms.
go through this thread for pics of a couple of my flattenned can bottoms:

viewtopic.php?f=19&t=669&st=0&sk=t&sd=a

i don't even jig them up, just eyball 'em and whack the mandrel with a hammer.

DarenN.......

Re: Some help with stove bottom

Posted: Thu Apr 03, 2008 10:52 pm
by Tony
Thanks DaddyMnM,Pure Mahem and Daren,

Using unopened cans is a good idea I am currently using empty cans from my local recycling depot, I do have some unopened can tops at home will try, thanks.

Thanks Daren for the link to your bottom flattening posting I some how missed it before, nice work ,I will try giving a the mandrel a whack with hammer.

I am going bush this weekend, I will let you know how my bottom flattening is going next week.

thanks

Tony

Re: Some help with stove bottom

Posted: Fri Apr 04, 2008 5:46 pm
by DaddyMnM
Tony,
I didn't really look at your pictures before. Looks like you have access to a lathe and already have some quality dies. Can't you mill the other end of the existing dies and put a sleeve over the cone press so they work two ways? One to make the cone and one to press the fuel cup? Also, I have made a pretty good impression in small cans using the biggest socket from my tool box and a hammer just eyeballing it like Darren says.

Re: Some help with stove bottom

Posted: Sat Apr 05, 2008 7:21 am
by Ridgerunner
Tony, I really like your pressed "volcano" stove top. Are there weep holes along the lower channel to fill fuel ? Good idea. :mrgreen:

Re: Some help with stove bottom

Posted: Tue Apr 08, 2008 10:08 am
by zelph
Cut a full can in half and use the unopened top of the can as suggested by DaddyMnM.

Smashing the bottoms will cause a small fracture in the folds of the aluminum. The fracture will only leak when you least expect it. When you're in the bush. ;)

The leaking occured on the bench for me :lol: