Boiling PVC but....

[Infernal2]

I've used the search function but I have a few questions about making sheet pvc from pipe.

My approach will be thus.

Using 4 inch Sch 40 I cut it in half lengthwise.
I will then heat it in the oven until pliable.
I will press it between two small sheet of 5/8 Plywood.

Is there anything flawed with this approach?

[L.J.R]

Just get 2 pieces of sheet metal and a piece of your 4 inch PVC put the PVC on top off one of the pieces of sheet metal and then place the other piece of sheet metal over the top put it in the oven when its pliable the weight of the top piece will push it down a bit put a brick on top of the sheet metal sandwich and turn the oven off after you can see that the pvc is flat and let it cool down then take your brick off and get the PVC. That’s how I do it.

[frankrede]

Umm what is a good use for sheet pvc?
I cant think of anythging.
Is it possible to melt multiple sheets together to make a pvc block?for a vortex?

[L.J.R]

I'm going to be using sheet PVC in my M-16 replicahttp://www.spudfiles.com/forums/viewtopic.php?t=3672&, Just glue alot of small sheets together and clamp it in a vice if you want a block, You can't really melt it but you can mold it around things while it's pliable to make molds I suppose.

[killagorrila99]

I can buy sheet PVC from my local hardware store.

[Infernal2]

^^^Lucky man.

L.J.R, sounds great man. At what temp and how long do you leave it in?

[L.J.R]

I did mine in my oven at about 150 degrees celsius, It will flaten out very easily with just a little weight on top

[schmanman]

Umm what is a good use for sheet PVC?
I cant think of anything.
Is it possible to melt multiple sheets together to make a PVC block?for a vortex?

that's a really good idea, and I may have to try that. (probably wont ever get around to it, though.)

ohh, and L.J.R, wouldn't the air in the brick expand, and the brick crack and explode? use a pot with buckshot or some type of steel in it instead. also, don't they sell it at mcmaster carr? It seems like the do, If my memory serves me correctly.

[boilingleadbath]

schmanman, the increase in temperature from 20->150C will only cause a 1/2 atm increase in pressure.
Now, the vapor pressure of the water trapped in the brick is another matter...

Yeah, mcmaster carr sells PVC sheet. What's your point?

[mark.f]

I need some for a scope rail.

All I need to do is get a half cut piece of pipe, boil it for several minutes, then press it flat against the counter with a plate.

I played around with boiling PVC when I was trying to figure out the optimal sleeving cut for making a 2" in 2" golfball barrel.