OldTools Archive
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250190 | RH Hutchins <rhhutchins@h...> | 2014‑08‑26 | Expanding Aluminum |
If this is OT, I trust the listmoms to file it in the round file. I'm trying to make some beer can stoves. I'm making a dozen or so to give to friends. The design I'm using calls for a top (with a hole in it to receive fuel) and bottom which sandwich in a baffle made from the spout of the bottle-shaped been can. The process means that the bottom piece must be stretched ever so slightly to allow it to slip over the top piece. The instructions I've seen call for all kinds of techniques and I've tried most of them with mixed success. One of the problem is that the aluminum is so thin that it dents very easily; so great care must be taken to avoid this as it pretty much ruins the design and the function of the stove. After cutting out the requisite pieces, I've tried stretching the bottom sides with no success. I've placed the bottom on another can and gently pressed on with a press but then I can't remove it. I've cut the other can away and removed it but the bottom didn't expand enough to accommodate the top piece. I hope that this description makes SOME sense. Can anyone suggest techniques that I might use. I have a number of old tools - including my feeble brain that just entered its 73rd year - that I might put to use but am at a loss which to try. Bob Hutchins Temple, TX, USA -- |
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250193 | "Peter H" <p-j-h@w...> | 2014‑08‑27 | Re: Expanding Aluminum |
http://vimeo.com/64726512 See the section beginning at 3:15. Best of luck. Cheers PeterH in Perth p.s. Just in case you cannot access the video: What is shown at 3:15 is a simple method of crimping which occurs when the fuel vents are created in the top section. A pocket knife is used to press evenly spaced creases around the top part of the can along the length of it, much like a stovepipe joint. The knife makes a small dent at the shoulder of the can top which becomes a vent channel. The crimped lower edge of the can top can now be inserted into the bottom part of the can. ------------------------------------------------- ----- Original Message ----- From: "RH Hutchins" To:"old >> Unknown" Cc: Sent:Tue, 26 Aug 2014 16:03:49 -0500 Subject:[OldTools] Expanding Aluminum If this is OT, I trust the listmoms to file it in the round file. I'm trying to make some beer can stoves. I'm making a dozen or so to give to friends. The design I'm using calls for a top (with a hole in it to receive fuel) and bottom which sandwich in a baffle made from the spout of the bottle-shaped been can. The process means that the bottom piece must be stretched ever so slightly to allow it to slip over the top piece. The instructions I've seen call for all kinds of techniques and I've tried most of them with mixed success. One of the problem is that the aluminum is so thin that it dents very easily; so great care must be taken to avoid this as it pretty much ruins the design and the function of the stove. After cutting out the requisite pieces, I've tried stretching the bottom sides with no success. I've placed the bottom on another can and gently pressed on with a press but then I can't remove it. I've cut the other can away and removed it but the bottom didn't expand enough to accommodate the top piece. I hope that this description makes SOME sense. Can anyone suggest techniques that I might use. I have a number of old tools - including my feeble brain that just entered its 73rd year - that I might put to use but am at a loss which to try. Bob Hutchins Temple, TX, USA -- ------------------------------------------------------------------------ OldTools is a mailing list catering to the interests of hand tool aficionados, both collectors and users, to discuss the history, usage, value, location, availability, collectibility, and restoration of traditional handtools, especially woodworking tools. To change your subscription options: http://ruckus .law.cornell.edu/mailman/listinfo/oldtools To read the FAQ: http://swingleydev.com/archiv e/faq.html OldTools archive: http://swingleydev.com/archive/">http://swingleydev.com/archive/ OldTools@r... http://ruckus .law.cornell.edu/mailman/listinfo/oldtools |
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250194 | "Cliff Rohrabacher, Esq" <rohrabacher@e...> | 2014‑08‑27 | Re: Expanding Aluminum |
Don't stretch the can. Use a knife edge to crease ( crimping is what you are doing) the top half around several places to shrink the top half and insert that into the base. |
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250205 | RH Hutchins <rhhutchins@h...> | 2014‑08‑27 | Re: Expanding Aluminum |
Thank you for the responses. The video shows a little different technique than the one I planned to use, but I'm definitely going to give it a try. bh Temple, TX On 8/26/2014 7:35 PM, Peter H wrote: > > http://vimeo.com/64726512 > > See the section beginning at 3:15. > Best of luck. > > Cheers > PeterH in Perth > > > p.s. Just in case you cannot access the video: > > What is shown at 3:15 is a simple method of crimping > > which occurs when the fuel vents are created in the top section. > > A pocket knife is used to press evenly spaced creases around > > the top part of the can along the length of it, much like a stovepipe > joint. > > The knife makes a small dent at the shoulder of the can top which > > becomes a vent channel. The crimped lower edge of the can top > > can now be inserted into the bottom part of the can. > > |
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250208 | Brent Kinsey <brentpmed@c...> | 2014‑08‑27 | Re: Expanding Aluminum |
On Aug 26, 2014, at 4:03 PM, RH Hutchins |
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250210 | RH Hutchins <rhhutchins@h...> | 2014‑08‑28 | Re: Expanding Aluminum |
On 8/27/2014 5:51 PM, Brent Kinsey wrote: > Ok Bob, > Thanks for sending me down the rabbit hole.... > > After googling and watching numerous videos I had to go to the 7-11 to buy a bottle shaped beer can (which I won't drink) a different sized energy drink (which I also won't drink) and a couple of soda cans. I am now also lamenting the demise of the Heineken keg shaped can (which I would have drank) even though I didn't know that I gave a rats behind about can shape, and had no idea they had quit making that can. (if you are wondering, search out the "penny stove" on the web...here. http ://www.jureystudio.com/pennystove/index.html) > > I now HAVE TO make some of these: a side burner, a penny stove (self pressurizing), the penny wood burner, and there are probably a half dozen more to try. > > I did see someone using a press to expand the can and it led me to wonder if we used an un-opened soda can as the die, lightly greased the inside of the piece to be expanded then pressed them together...the full can wouldn't dent or crush and the lubricant should make it easier to twist the expanded piece off. The expanding jaw chuck from a lathe might work as a spreader if you used a strip of tin cut to fit around the chuck to even out the round pressure so it would spread more evenly. > > Geez, see what you did to me? > > Brent K. Just slightly north of you in OK. > You're welcome, (heheheh)! Nothing like giving someone a slight push to start them down another slippery slope . . . or rabbit hole. I tried the press but was notably unsuccessful using a full can as a die. Oh, it pushed into the other piece easily enough but even using different oils and vaseline I was unable to separate the two pieces without cutting one of them away with scissors. It was that failure that caused me to post the original question. If you try this, don't forget to punch a hole in the bottoms so that you don't get an air lock. I'm going to try the one that Peter in Perth posted the Vimeo link for. It seems easy enough to do and promises a very good perimeter flame. BobH looking for some rain a little bit South of Brent K. |
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