Bondo fiber glass resin + aluminum
-
Sticky_Tape
- Sergeant 2
- Posts: 1175
- Joined: Thu Jan 31, 2008 6:35 pm
- Location: Sydney, Nova Scotia, Canada.
It seems that when I try to make casting from cpvc to aluminum the aluminum barrel slips out of the casting I roughened up the barrel for casting but it wouldn't work any ideas. BTW I got the mix right 12 drops per oz. resin - 3 drops 1/4 oz. resin.
You can tell how awesome a cannon is by the pressure used.
http://www.spudfiles.com/forums/high-pr ... 12803.html
xnt rnm ne z ahtbg
http://www.spudfiles.com/forums/high-pr ... 12803.html
xnt rnm ne z ahtbg
-
jrrdw
- Moderator
- Posts: 6572
- Joined: Wed Nov 16, 2005 5:11 pm
- Location: Maryland
- Has thanked: 39 times
- Been thanked: 22 times
- Contact:
Stud the barrel.Sticky_Tape wrote:It seems that when I try to make casting from cpvc to aluminum the aluminum barrel slips out of the casting I roughened up the barrel for casting but it wouldn't work any ideas. BTW I got the mix right 12 drops per oz. resin - 3 drops 1/4 oz. resin.
Drill holes, tap the holes, then screw in machine screws with Loctite on the threads, then cast it.
Why are you using Bondo fiber glass resin?
-
Sticky_Tape
- Sergeant 2
- Posts: 1175
- Joined: Thu Jan 31, 2008 6:35 pm
- Location: Sydney, Nova Scotia, Canada.
What's wrong with it? btw I woud reather just do the more simple cast.Why are you using Bondo fiber glass resin?
You can tell how awesome a cannon is by the pressure used.
http://www.spudfiles.com/forums/high-pr ... 12803.html
xnt rnm ne z ahtbg
http://www.spudfiles.com/forums/high-pr ... 12803.html
xnt rnm ne z ahtbg
-
Sticky_Tape
- Sergeant 2
- Posts: 1175
- Joined: Thu Jan 31, 2008 6:35 pm
- Location: Sydney, Nova Scotia, Canada.
Oh ok * walks away *
You can tell how awesome a cannon is by the pressure used.
http://www.spudfiles.com/forums/high-pr ... 12803.html
xnt rnm ne z ahtbg
http://www.spudfiles.com/forums/high-pr ... 12803.html
xnt rnm ne z ahtbg
-
jackssmirkingrevenge
- Five Star General
- Posts: 26216
- Joined: Thu Mar 15, 2007 11:28 pm
- Has thanked: 576 times
- Been thanked: 347 times
how did you roughen up the barrel? Just a light sanding? If so, try repeated file marks or saw cuts, not enough to go through the barrel though of course.
hectmarr wrote:You have to make many weapons, because this field is long and short life
-
Gippeto
- First Sergeant 3
- Posts: 2504
- Joined: Sat Jan 19, 2008 10:14 am
- Location: Soon to be socialist shit hole.
- Has thanked: 2 times
- Been thanked: 17 times
The problem could be that epoxies and fibreglass resins create heat when curing.
Aluminum has a fairly high coefficient of expansion.
Simply put, this means it grows when heated.
If it "grows" while the epoxy is curing, then the epoxy cures with a larger hole in it, and your aluminum tube does not stay put.
Try JB weld.
Aluminum has a fairly high coefficient of expansion.
Simply put, this means it grows when heated.
If it "grows" while the epoxy is curing, then the epoxy cures with a larger hole in it, and your aluminum tube does not stay put.
Try JB weld.
"It could be that the purpose of your life is to serve as a warning to others" – unknown
Liberalism is a mental disorder, reality is it's cure.
Liberalism is a mental disorder, reality is it's cure.
-
jackssmirkingrevenge
- Five Star General
- Posts: 26216
- Joined: Thu Mar 15, 2007 11:28 pm
- Has thanked: 576 times
- Been thanked: 347 times
I've epoxied aluminium tubing before successfully, I doubt thermal expansion is a real factor here.
hectmarr wrote:You have to make many weapons, because this field is long and short life