Cannot recall if it was an episode of "How It Is Made" or Mr Rodgers,
that I stumbled across one day, but they were in an instrument shop, and
followed through the whole process, bending, spinning and soldering
together the parts of a trombone or trumpet. I think it may have been a
trumpet, as I recall valves being there.
The freezer scene featured large, showing a person lifting out a batch
of frozen parts and bending them.
In the video I saw they used pitch, in the next thread over they used
I suspect that anything that is normally used to bend tubing will work,
and will have advantages and disadvantages. Can't one pack a tube with
sand for this operation as well, or am I hallucinating?
Oh, I'm well familiar with that use for things like header pipes and
I just wouldn't want to use that method on the internals of a musical
instrument. the clarity of tone might be affected by the internal finish.
Pitch would work too, but it is hard to cleanup and getting a reliable fill
might be tough.
However, for something like a french horn, where the bend is in the bell
taper, pitch would be required.
The slushy water would just squirt out the wide end. Pitch is sticky and
glues itself to the walls forming a plug that keeps the backpressure in.
Paul K. Dickman
On Tue, 13 Nov 2007 06:25:42 -0800, email@example.com
Saw this on "How it's made" the other day. They use this compound
called "Dihydrogen Monoxide" heated beyond its melting point, and then
they allow it to cool to below the melting point so it becomes a
solid that is soft enough to allow bending but strong enough to prevent
kinking. Be careful of the stuff (if it's not banned where you are),
see http://www.dhmo.org/ for details on its hazards. Inhalation hazards
and all that...
I hear there's a chronic shortage of it in several parts of the country.
Very impractical of you to suggest using something that exotic and hard-to-
find. Sand, on the other hand, is in everyone's shoes.
So you can have no proper agriculture, the basis of all virture and
economic prosperity, and in turn the leisure to develop the liberal arts,
of which music is prime, so you clearly have NO NEED OF TROMBONES.
Ah, that's where you're wrong. Clay is just fine for my tree farm.
(oak/maple/ash/pine/spruce/fir/walnut). Makes 'em grow nice and
slllllow, which makes for nice lumber given proper trimming (which I
do). So, it's, er, a _feature_, not a bug, you see. So let's see the
lumber then, provides for WOODwinds, rather than brASS.
Point remains that DHMO is used in torture, found in tumors, and will
kill you if you get a lungful of the stuff. But nice try at diversion
there. Lets keep our eye on what matters, mmm-kay?
Actually, what I really intend to bend is steel tubing for a tubular
A mandrel bender would be nice if I could afford it but it's just too
expensive for me.
I do have here a simple hydraulic bender (ram style bending... see
http://www.oceanmachinery.com/how-to-bend-pipe-and-tube.htm ) which I
think wouldn't make good, smooth bends and so I'm thinking of putting
in something to support the inside of the tube while bending.
I was thinking of some metal with a low melting point. but you guys
Can sand help me get bends similar to those of a mandrel bender?
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