Login    Register
User Information
Username:
Password:
We are a free and open
community, all are welcome.
Click here to Register
Sponsored
Who is online

In total there are 72 users online :: 5 registered, 0 hidden and 67 guests


Most users ever online was 218 on Wed Dec 07, 2016 6:58 pm

Registered users: Bing [Bot], Exabot [Bot], Google [Bot], MSNbot Media, Yahoo [Bot] based on users active over the past 5 minutes

The Team
Administrators
Global Moderators
global_moderators.png CS

Can acrylic glued to PVC withstand pressure?

Post about things you have launched or thought about launching. Also post about various materials used for building cannons. No posts about explosive projectiles!
Sponsored 
  • Author
    Message

Can acrylic glued to PVC withstand pressure?

Unread postAuthor: limbeh » Fri Aug 22, 2008 2:24 am

Hi,

I'm planning to buy 6mm thick clear acrylic sheet, cut it into the required shapes, and glue it to some PVC pipe (5.5mm thick JIS VP- can withstand pressure) to make a piston. I will probably use either epoxy or multipurpose cement to glue them together.

Anyone got any comments to whether this is safe enough to withstand 8 bar / ~ 120psi pressure difference?

Sorry to bother you guys again with dumb questions, but I can't test it out for myself. I live in Singapore and my brother's a policeman, so I can't afford to have any exploding chambers because I can't hide them.

Thanks.
  • 0

Last edited by limbeh on Mon Sep 01, 2008 9:07 am, edited 1 time in total.
User avatar
limbeh
Staff Sergeant
Staff Sergeant
 
Posts: 128
Joined: Sun Dec 30, 2007 10:52 pm
Reputation: 0

Unread postAuthor: CasinoVanart » Fri Aug 22, 2008 2:50 am

Limbeh, can you give a few more details in regards to the shapes you want to cut, i don't quite get what you mean about the piston- i think that stuff like contact cement would work for bonding the two materials but i need clarification. :)

edit:spllig
  • 0

User avatar
CasinoVanart
1st Lieutenant
1st Lieutenant
 
Posts: 281
Joined: Wed Jul 30, 2008 1:10 am
Reputation: 0

Unread postAuthor: limbeh » Fri Aug 22, 2008 5:25 am

The piston is in the shape of a cylinder. The pipe forms the cylinder while 2 circular acrylic disks will be used for covering the 2 ends of the cylinder.

The diameter of the disks is about 4 inches / 10cm.

Thanks.
  • 0

User avatar
limbeh
Staff Sergeant
Staff Sergeant
 
Posts: 128
Joined: Sun Dec 30, 2007 10:52 pm
Reputation: 0

Unread postAuthor: CasinoVanart » Fri Aug 22, 2008 7:22 am

If you are using the acrylic as end plates for a piston the chamber will not be subjected to any extra stress because of the fact, how you hold the plates to the end of the piston is the problem?
I am not sure i understand your problem :?

Edit: A digaram would be useful :wink:
  • 0

User avatar
CasinoVanart
1st Lieutenant
1st Lieutenant
 
Posts: 281
Joined: Wed Jul 30, 2008 1:10 am
Reputation: 0

Unread postAuthor: Insomniac » Fri Aug 22, 2008 8:12 am

Is this a piston for use in a piston valved pneumatic? If so, the piston really isn't subjected to much pressure (although if you use a sealed hollow piece of pipe as a piston, it will have external pressure, but this isn't a real problem) Would you mind drawing up a diagram of what you want to make? Just use paint or somthing, it will help us work out exactly what you are asking.
  • 0

I wonder how much deeper the ocean would be without sponges.
Right now I'm having amnesia and deja vu at the same time. I think I've forgotten this before.

Add me on msn!!! insomniac-55@hotmail.com
User avatar
Insomniac
Major General
Major General
 
Posts: 1297
Joined: Mon Dec 18, 2006 3:47 pm
Location: Australia
Country: Australia (au)
Reputation: 0

Unread postAuthor: limbeh » Fri Aug 22, 2008 9:56 am

Hi,

Here's the design.

Pretty simple actually. A simple cylinder. Only question is whether PVC can be glued to acrylic and withstand pressure difference of about 8 bars.

The inside of the piston should be hollow, unless it can't withstand the pressure difference. Which in that case I will probably just fill it up with silicon sealant.

Thanks.
  • 0

Attachments
piston construction.JPG
Piston construction
piston construction.JPG (19.98 KiB) Viewed 521 times
User avatar
limbeh
Staff Sergeant
Staff Sergeant
 
Posts: 128
Joined: Sun Dec 30, 2007 10:52 pm
Reputation: 0

Unread postAuthor: jackssmirkingrevenge » Fri Aug 22, 2008 10:45 am

The right epoxy prepared well and applied to a properly prepared (roughened and cleaned) surface will do the job.
  • 0

User avatar
jackssmirkingrevenge
Donating Member
Donating Member
 
Posts: 24225
Joined: Thu Mar 15, 2007 11:28 pm
Country: Holy See (Vatican City State) (va)
Reputation: 66

Sponsored

Sponsor
 


Unread postAuthor: brogdenlaxmiddie » Fri Aug 22, 2008 11:00 am

THE EPOXY GOD HAS SPOKEN! hahahaha, but seriously, you'd be fine with your design, just don't forget the bumper!
  • 0


brogdenlaxmiddie
Colonel
Colonel
 
Posts: 562
Joined: Sun Jul 22, 2007 2:19 pm
Country: United States (us)
Reputation: 0

Unread postAuthor: MrCrowley » Fri Aug 22, 2008 3:18 pm

The pressure isn't the problem, it's the bumper. As long as you have a good bumper you'll be fine.
  • 0

User avatar
MrCrowley
Moderator
Moderator
 
Posts: 10207
Joined: Fri Jun 23, 2006 10:42 pm
Location: Auckland, New Zealand
Country: New Zealand (nz)
Reputation: 4

Unread postAuthor: limbeh » Sat Aug 23, 2008 9:09 am

As expected, the very mention of epoxy brought jackssmirkingrevenge out - precisely who I'm looking for.

Jacksmirkingrevenge, from your experience, do you know if marine epoxy is better than normal Araldite epoxy?

I suppose 3mm thick 75 deg rubber isn't soft enough as a bumper. I'll probably be using a lot of old mousepads instead.

Thanks!
  • 0

User avatar
limbeh
Staff Sergeant
Staff Sergeant
 
Posts: 128
Joined: Sun Dec 30, 2007 10:52 pm
Reputation: 0

Return to Construction Materials/Ammo Discussion

Who is online

Registered users: Bing [Bot], Exabot [Bot], Google [Bot], MSNbot Media, Yahoo [Bot]

Reputation System ©'