 The Clarinet BBoard
|
Author: saxlite
Date: 2010-04-06 22:15
Need to cement a broken tenon on a Vito Resonite alto clarinet. I believe the material is actually ABS plastic.....can anyone confirm this or advise what basic plastic type this is? Thanks!
Jerry
|
|
Reply To Message
|
|
Author: Chris P
Date: 2010-04-06 23:37
Araldite or any similar epoxy resin will do the trick - it will work with most plastics including Resonite and ABS.
Are you sticking the broken tenon back on, or machining and fitting a new one into the joint?
If you're doing the former, you will need to reinforce it with metal pins going through the tenon and into the body or a metal sleeve that will reinforce the tenon - though the metal tubing (nickel silver or stainless steel) will need an 18mm inside diameter and you'll have to machine out the tenon and part of the bore to fit the metal tube in (and glue it in with Araldite as well). If you're making a completely new one, turn it from Delrin or ABS stock.
Former oboe finisher
Howarth of London
1998 - 2010
The opinions I express are my own.
Post Edited (2010-04-06 23:42)
|
|
Reply To Message
|
|
Author: clarnibass
Date: 2010-04-07 06:01
Some repairers claim to use specific plastic glues that weld the break, making it the same as it was before. But unless you want the specific glue does this for the specific plastic it can be too risky.
I agree with Chris and recommend a strong epoxy. I have tried more than a few types and there are differences and I wouldn't just use any. I also agree that the glue alone is too risky and it's better with reinforcement pins. It is crucial to have vent holes for the pin holes othewise you will have air gaps inside.
>> If you're making a completely new one, turn it from Delrin or ABS stock. <<
AFAIK delrin is considered a non-gluable plastic. Not that you can't glue it but it is not relaible for gluing compared with some other plastics like ABS.
Post Edited (2010-04-07 06:01)
|
|
Reply To Message
|
|
Author: tictactux ★2017
Date: 2010-04-07 06:48
Actually, Delrin is used for bearings, ice rink boards, ... because of its non-sticking qualities.
--
Ben
|
|
Reply To Message
|
|
Author: Chris P
Date: 2010-04-07 11:02
Oops - I meant ebonite, but was thinking of Delrin.
Former oboe finisher
Howarth of London
1998 - 2010
The opinions I express are my own.
|
|
Reply To Message
|
|
Author: David Spiegelthal ★2017
Date: 2010-04-07 15:13
Whatever adhesive you use, proper surface preparation is crucial. This usually means cleaning the mating surfaces, roughening them slightly with sandpaper or steel wool, and cleaning them again with a good solvent (one which does not degrade the material itself). Some useful solvents include isopropyl alcohol (only moderately effective but has the advantage of being benign to most plastics), acetone (a more effective solvent but can dissolve or soften some plastics), and various forms of mineral spirits (less effective than the aforementioned, in my experience).
|
|
Reply To Message
|
|
Author: Chris P
Date: 2010-04-07 15:24
Acetone will dissolve ABS resin, so best use alcohol rather than solvents on these kind of plastics.
Former oboe finisher
Howarth of London
1998 - 2010
The opinions I express are my own.
|
|
Reply To Message
|
|
Author: jasperbay
Date: 2010-04-07 17:43
My belief is that 'resinite' , as used in the US for Bundys and Vito's is ABS. Try a little ABS glue on a spot and see if it dissolves the surface, as it will on an ABS plumbing fitting.
Clark G. Sherwood
|
|
Reply To Message
|
|
Author: RoBass
Date: 2010-04-08 19:46
ABS isn't glueable so fast as before. Best way is to reinforce the tenon like described (with a metal sleeve or well set bolts).
kindly
Roman
PS: The same is said for ebonite - nothing on earth to glue it fast and stable. Please contact a manufacturer of car styling spare parts or motorcyclist helmets for further informations...
|
|
Reply To Message
|
|
The Clarinet Pages
|
 |
.jpg){kind=small}
.jpg){kind=small}
.jpg){kind=small}
.jpg){kind=small}
.jpg){kind=small}
.jpg){kind=small}
