Something for the peeps with metal allergies
- LIBrassCo
- Posts: 585
- Joined: Feb 24, 2019
Something kinda cool I'm prototyping, resin topped blanks. Doing a few just for some rigorous testing. Here's photos of the first one. Thus far I'm quite enjoying it, nice dark sound.
- harrisonreed
- Posts: 6479
- Joined: Aug 17, 2018
It looks cool!
- LIBrassCo
- Posts: 585
- Joined: Feb 24, 2019
[quote="Posaunus"]Jeff,
What material did you machine for the cup top?[/quote]
Slow cure foodsafe resin, poured and set for a week. I've done it in a different variation with excellent results, but the process just to make the blank took far too long to be profitable. If this bond is adequate, I'll be able to produce them.
What material did you machine for the cup top?[/quote]
Slow cure foodsafe resin, poured and set for a week. I've done it in a different variation with excellent results, but the process just to make the blank took far too long to be profitable. If this bond is adequate, I'll be able to produce them.
- Posaunus
- Posts: 5018
- Joined: Mar 23, 2018
I think you can readily purchase off-the-shelf polycarbonate rod stock in appropriate diameter, as Doug Elliott must do for his rims. Possible alternates: Delrin, ABS. :idk:
- LIBrassCo
- Posts: 585
- Joined: Feb 24, 2019
[quote="Posaunus"]I think you can readily purchase off-the-shelf polycarbonate rod stock in appropriate diameter, as Doug Elliott must do for his rims. Possible alternates: Delrin, ABS. :idk:[/quote]
Sure, but this is made as one piece and more than just the rim. Goes .75" into the mouthpiece. Plus, it looks sexy.
Sure, but this is made as one piece and more than just the rim. Goes .75" into the mouthpiece. Plus, it looks sexy.
- robcat2075
- Posts: 1867
- Joined: Sep 03, 2018
Looks snazzy!
- LIBrassCo
- Posts: 585
- Joined: Feb 24, 2019
Was able to optimize the full resin top with metal core method as well. This is a tenor or thin rim bass blank ready to cut.
- trombonedemon
- Posts: 218
- Joined: Aug 06, 2018
Darn, you need an apprentice to teach that too.
- LIBrassCo
- Posts: 585
- Joined: Feb 24, 2019
[quote="trombonedemon"]Darn, you need an apprentice to teach that too.[/quote]
Lol. Heres the final product
Lol. Heres the final product
- LIBrassCo
- Posts: 585
- Joined: Feb 24, 2019
[quote="Posaunus"]Is the (beautiful) resin cup threaded onto the shank?[/quote]
Yup. There's a piece of metal thats set in the resin when its poured. That's whats threaded.
Yup. There's a piece of metal thats set in the resin when its poured. That's whats threaded.
- elmsandr
- Posts: 1373
- Joined: Mar 23, 2018
[quote="LIBrassCo"]<QUOTE author="Posaunus" post_id="190744" time="1665526322" user_id="158">
Is the (beautiful) resin cup threaded onto the shank?[/quote]
Yup. There's a piece of metal thats set in the resin when its poured. That's whats threaded.
</QUOTE>
To make sure I understand, you overmold the resin on the threads? Or do you thread both and join them?
(I always love the process nuances)
Cheers,
Andy
Is the (beautiful) resin cup threaded onto the shank?[/quote]
Yup. There's a piece of metal thats set in the resin when its poured. That's whats threaded.
</QUOTE>
To make sure I understand, you overmold the resin on the threads? Or do you thread both and join them?
(I always love the process nuances)
Cheers,
Andy
- LIBrassCo
- Posts: 585
- Joined: Feb 24, 2019
[quote="elmsandr"]<QUOTE author="LIBrassCo" post_id="190749" time="1665528968" user_id="4931">
Yup. There's a piece of metal thats set in the resin when its poured. That's whats threaded.[/quote]
To make sure I understand, you overmold the resin on the threads? Or do you thread both and join them?
(I always love the process nuances)
Cheers,
Andy
</QUOTE>
Well since u asked....
I cut a piece of metal (bronze, brass, nickel silver, etc) to .7" diameter and 1.25" long. On the bottom it is threaded but not drilled past the threaded area. Then I make a wood disc thats 1.85" dia and .25" thick, to press onto the bottom on the metal core. This is used to center the metal in the resin, and provide a hard bottom to my makeshift mold. I then take a buttload (technical term) of blue tape and make a cylindrical mold out of it. At this point i mix up 105 grams of 2:1 resin, adding whatever color and flake tickles my fancy, stirring with a drill for 5ish minutes. After carefully pouring it into the mold, I run it through a bunch of vacuum cycles to pull the air out. Takes about an hour to get it all out. It then sits for 7 days, then is demolded. I screw it into a fixture, and cut the whole thing down to a working dimension.
Yup. There's a piece of metal thats set in the resin when its poured. That's whats threaded.[/quote]
To make sure I understand, you overmold the resin on the threads? Or do you thread both and join them?
(I always love the process nuances)
Cheers,
Andy
</QUOTE>
Well since u asked....
I cut a piece of metal (bronze, brass, nickel silver, etc) to .7" diameter and 1.25" long. On the bottom it is threaded but not drilled past the threaded area. Then I make a wood disc thats 1.85" dia and .25" thick, to press onto the bottom on the metal core. This is used to center the metal in the resin, and provide a hard bottom to my makeshift mold. I then take a buttload (technical term) of blue tape and make a cylindrical mold out of it. At this point i mix up 105 grams of 2:1 resin, adding whatever color and flake tickles my fancy, stirring with a drill for 5ish minutes. After carefully pouring it into the mold, I run it through a bunch of vacuum cycles to pull the air out. Takes about an hour to get it all out. It then sits for 7 days, then is demolded. I screw it into a fixture, and cut the whole thing down to a working dimension.
- robcat2075
- Posts: 1867
- Joined: Sep 03, 2018
It brings to mind some very old mouthpieces that were turned out of ivory.
Since you are doing semi-transparent version I think some embedded LEDs that flashed to sounds to be the next step.
Since you are doing semi-transparent version I think some embedded LEDs that flashed to sounds to be the next step.
- hornbuilder
- Posts: 1384
- Joined: May 02, 2018
No allergy issues with the metal flake?
- LIBrassCo
- Posts: 585
- Joined: Feb 24, 2019
[quote="hornbuilder"]No allergy issues with the metal flake?[/quote]
If it was a concern I can simply not use any. Just a little color and good to go.
If it was a concern I can simply not use any. Just a little color and good to go.
- hornbuilder
- Posts: 1384
- Joined: May 02, 2018
<EMOJI seq="1f44d" tseq="1f44d">👍</EMOJI>
- LIBrassCo
- Posts: 585
- Joined: Feb 24, 2019
[quote="hornbuilder"]No allergy issues with the metal flake?[/quote]
And here's what that looks like. No coloring or metal flake.
And here's what that looks like. No coloring or metal flake.