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The Trombone ForumHorns, Gear, and EquipmentMouthpieces(Moderators: BGuttman, Doug Elliott) Mouthpiece Component Duplication in Delrin/Lexan/?
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JohnL
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« on: Feb 08, 2015, 04:38PM »

I've got one those 1920's vintage Olds mouthpieces with an ivory insert. I'd like to have someone make a duplicate of the insert in delrin (or other suitable non-metallic). I'm going to contact Kanstul about it, but does anyone have any recommendations?
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« Reply #1 on: Feb 08, 2015, 05:14PM »

You can get DE rims in delrin, so he must know something about machining it.  Might try asking him.
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« Reply #2 on: Feb 08, 2015, 05:28PM »

You can get DE rims in delrin, so he must know something about machining it.  Might try asking him.
I exclude Doug at the onset because he has stated more than once that he doesn't do duplication work. Right now, the goal is to produce something in the original dimensions that isn't made of a completely irreplaceable and somewhat fragile material. At some later time, I may want experiment with inserts having dimensions differing from the original - if I get to that point, I will approach Doug to see if he's interested in producing inserts using his cup and rim designs that fit the Olds outer shell.
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growlerbox
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« Reply #3 on: Feb 08, 2015, 05:48PM »

Dave Harrison of Wedge also makes Delrin versions of his mouthpieces.  Not sure if he makes copies of components, but might be worth a shot if Doug doesn't.
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Matt K

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« Reply #4 on: Feb 08, 2015, 06:04PM »

Frostmouthpieces does this:
http://www.frostcustombrass.net/services.html

I can't vouch for their quality personally, but there was a forum member on here recently who had some work done to make a cup that holds water on the exterior and he seems to like the quality of work.
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Doug Elliott
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« Reply #5 on: Feb 08, 2015, 06:42PM »

I would probably do it if you ask nicely and don't have a deadline...

Delrin is extremely easy to work with, but it exudes formaldehyde so I choose not to use it.  Lexan is quite a pain to work with but I feel it has better properties as a mouthpiece material.
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« Reply #6 on: Feb 08, 2015, 11:12PM »

Delrin is extremely easy to work with, but it exudes formaldehyde so I choose not to use it.

But DuPont et al say that's OK  :D

http://plastics.dupont.com/plastics/pdflit/americas/delrin/FETEG_Facts.pdf
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« Reply #7 on: Feb 09, 2015, 06:06AM »

I would probably do it if you ask nicely and don't have a deadline...

Delrin is extremely easy to work with, but it exudes formaldehyde so I choose not to use it.  Lexan is quite a pain to work with but I feel it has better properties as a mouthpiece material.

My "Signature Model" is exuding formaldahyde?
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Doug Elliott
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« Reply #8 on: Feb 09, 2015, 06:17AM »

For you it's "Casual-dehyde" since it's plastic.

Although the fact that it's black does "exude" an "air" of "formal-dehyde."
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« Reply #9 on: Feb 09, 2015, 08:35AM »

I would probably do it if you ask nicely and don't have a deadline...
Thanks. I'll keep that in mind in case Jim New at Kanstul can't do it. It's something I'd rather not trust to USPS or UPS, so getting Kanstul to do it is ideal.
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« Reply #10 on: Feb 09, 2015, 09:19AM »

I would probably do it if you ask nicely and don't have a deadline...

Delrin is extremely easy to work with, but it exudes formaldehyde so I choose not to use it.  Lexan is quite a pain to work with but I feel it has better properties as a mouthpiece material.

...
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Doug Elliott
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« Reply #11 on: Feb 09, 2015, 09:38AM »

Delrin and ABS may be related but they're not the same thing at all.
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« Reply #12 on: Feb 09, 2015, 10:31AM »

Delrin is polyoxymethylene (aka polyformaldehyde), not ABS.

It is FDA approved, but I wouldn't let that stop you from worrying about it.
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« Reply #13 on: Feb 09, 2015, 11:06AM »

Note that ABS (acrylonitrile-butadiene-styrene copolymer) is not Lexan (a polycarbonate) and each have different machining properties.  I've never seen ABS used as a mouthpiece.

Lexan is the polymer used in bullet-proof glass.  Highly impact resistant.
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Bruce Guttman
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Doug Elliott
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« Reply #14 on: Feb 09, 2015, 11:14AM »

Reinhardt's molded mouthpieces were ABS.
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« Reply #15 on: Feb 09, 2015, 11:36AM »

I found some black plastic drainage or sewer pipe that rang like a bell when I dropped it.

I was pretty sure it was ABS.

Later I went to the home improvement store to check it out.  I thought something that rang so easily might make a good marimba if I cut the pipes the right length.

I've yet to find it.  Everything they carry now just gives a dull thud. 

Not that I think a mouthpiece has to vibrate, but still. 
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Tim Richardson
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« Reply #16 on: Feb 09, 2015, 11:40AM »

Reinhardt's molded mouthpieces were ABS.

Not surprising.  ABS is mostly molded.  But that's the first ABS mouthpiece I've heard of.
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Bruce Guttman
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« Reply #17 on: Feb 09, 2015, 04:14PM »

Right now, the goal is to produce something in the original dimensions that isn't made of a completely irreplaceable and somewhat fragile material.

It might be interesting to try tagua nuts, AKA "vegetable ivory".

http://en.wikipedia.org/wiki/Phytelephas
http://www.taguanutivory.com/tagua-for-carving-and-burning-tagua-whole-nuts.html

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