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The very essence of bow making (a Hail Mary)
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seammc
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Joined: 04 Feb 2014
Posts: 58
Location: peru,ma..usa

PostPosted: Thu Apr 17, 2014 12:31 pm    Post subject: 400 degrees? Reply with quote

I think you can make charcoal at that temp (in a retort)
Jim
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whatwasithinking
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Joined: 26 Jan 2013
Posts: 209
Location: Washington State

PostPosted: Thu Apr 17, 2014 12:43 pm    Post subject: Reply with quote

wm_crash wrote:
Someone correct me if I am wrong (or buy me the book so I can correct myself), but these guys clamp the slick to molds which they then place in an oven (at 400F if I recall correctly). They allow the stick to cool on that mold/form along with the oven.


Believe it or not, they heated the oven to 280C, or 536F. This is hot enough to turn the finest Pernambuco to charcoal, which I guess might be useful to form coals for cambering another stick. I suppose they arrived at this number through experimentation, but it would certainly require close observation during the heating process. My heat gun produces hot air of about 650F, but I'm not leaving the wood in that air continuously for 20-25 minutes. They let them cool in the jig until below 50C.

I believe Mat Roop tried their method some time back, without encouraging results.

Somewhere I read that many Chinese bow making firms use the Kun & Regh book as their bible of manufacturing processes. I know a maker who visited a Chinese bow factory. I'll have to ask him what he saw. I know they use planes that look like Japanese furniture-maker's planes, having many blades, and work very quickly.

Bob
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seammc
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Joined: 04 Feb 2014
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Location: peru,ma..usa

PostPosted: Thu Apr 17, 2014 5:39 pm    Post subject: John Bolander's booklet Reply with quote

Most curious... when he started out he had to make his own tools, under his teachers eye ...that was the way it was done years ago ...unheard of now

That is how My grandfather learned to be a blacksmith back in the 1920's ..parts of his booklet take me back to my childhood

I'm sure that John knew that cut nails make a nice, small, custom gouge or chisel ..a rasp from a leaf spring worked white hot with a pointed chisel then quenched and so on .... A lot has been lost over the years

Bob, thanks again for the Bolander resource

Jim
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wm_crash
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Joined: 24 Feb 2013
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Location: Wilmington, DE - USA

PostPosted: Tue May 13, 2014 11:42 am    Post subject: Re: simple bow Reply with quote

wm_crash wrote:
E.g., last night I glued up an asymmetric shell for a walnut snare drum.


Just in case anyone was wondering:






cheers,
wm_crash, the friendly hooligan
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seammc
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Joined: 04 Feb 2014
Posts: 58
Location: peru,ma..usa

PostPosted: Tue May 13, 2014 11:55 am    Post subject: drum Reply with quote

WOW
I like your wooden plane

I have made a couple and they are easy to make

Jim
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wm_crash
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PostPosted: Wed Jun 04, 2014 12:44 pm    Post subject: Reply with quote

OK, so the drum is done and now I can get back into bow making mode:



cheers,
wm_crash, the friendly hooligan
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seammc
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PostPosted: Wed Jun 04, 2014 1:05 pm    Post subject: drum Reply with quote

nice job

Jim
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Ed Shillitoe
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Joined: 23 Mar 2007
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Location: Syracuse NY

PostPosted: Fri Jun 06, 2014 8:16 pm    Post subject: Reply with quote

Yes, very nice work.
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