Mysterious raids around the world
- Thread starter Bird
- Start date
Timon
Apprentice elf
Bird said:
I got the same recommendation from the tube company I talked to. He did say that MEK is controlled and might be hard to get. I'll have to check on that.
Update:
Found this on welding Polystyrene:
- 1,2 Dichloroethane: Y
- Acetone: Y
- Cyclohexanone: Y
- Dichloromethane: Y
- MEK: Y
- Methyl benzene: Y
- Tetrahydrofuran: Y
westy27 said:
Did you have a chance to try the sand method yet?
Whilst this video is more about testing the WS2801 RGB (BGR) strip, couldn't resist having a long tube to see how it looked
ws2801test1
Cheers
Phil
ws2801test1
Cheers
Phil
Steve22537
Full time elf
Some members are looking at bending the tubes with air pressure as in this YouTube video clip.
DIY - Bending PVC Pipe with Air Pressure - HenryWitecki.com (Cataclyst) and Chris Powell
The only problem with this method is that the tube needs to be sealed at both ends prior to heating and injecting of the compressed air. In the film clip a rubber compession bung is being used, I have found a similar compression bung which appears would do a similar job. I havn't tried this but can see why it shouldn't work.
http://www.haron.com.au/mechanical_test_plugs.html
And there available from your local Bunnings store.
Steve
DIY - Bending PVC Pipe with Air Pressure - HenryWitecki.com (Cataclyst) and Chris Powell
The only problem with this method is that the tube needs to be sealed at both ends prior to heating and injecting of the compressed air. In the film clip a rubber compession bung is being used, I have found a similar compression bung which appears would do a similar job. I havn't tried this but can see why it shouldn't work.
http://www.haron.com.au/mechanical_test_plugs.html
And there available from your local Bunnings store.
Steve
Henedce
Apprentice elf
Made the first of my 2012 Columns/Fireworks/Roof Lights .. Think I am going to use as columns though , maybe 8 - 12 of them on the corners of my house. I found the easiest way to join the tubes was simply a good quality super glue and using an off cut split to wrap around and glue the join . Once they are lit up its hard to see it anyway..
Column Prototype
Column Prototype
Column Prototype
Column Prototype
Benslights
Dedicated elf
Nice job done Henedce they look great im looking to do the same with 6 modules in a tube
Slite
Full time elf
Dang, but those things are BRIGHT! What pixels are you using?
Henedce
Apprentice elf
Im actually using these dumb modules from Ray Wu
http://www.aliexpress.com/fm-store/701799/209889132-423204013/promotion-5050-SMD-RGB-LED-module-DC12V-input-waterproof-20pcs-a-string.html
18 of them in pairs to make 27 channels . Going to run each one off
http://www.aliexpress.com/product-fm/378111925-Easy-DMX-LED-controller-dmx-decoder-driver-wholesalers.html
Makes for a really cheap display item @ $13.14 ea plus controller @ $44.21
Went to Bunnings today to find the plugs to seal the tube... no luck with them but did find some 80mm downpipe blocking rubbers. These are a nice tight push into the the tubes.
Under $5 each (rip off really) i grabbed a couple to try out.
I thought let's just plug the end of a 20" tube and see if the heated air itself provided enough pressure.... Now there is good news and bad news.
The blocking plugs provided a nice air tight seal, evidenced by the bad news bit where once the tube was hot enough to bend the pressure actually caused the tube to expand outwards and still didn't allow me to bend it in a semicircle.
So tried a 50" tube... basically the same result. Seems like the walls are too thin to provide support for the air pressure when hot enough to bend.
What did seem quite possible is that it may be quite practical to form a long arch from joined tubes if you can get the long tube uniformly heated.
Phil
Under $5 each (rip off really) i grabbed a couple to try out.
I thought let's just plug the end of a 20" tube and see if the heated air itself provided enough pressure.... Now there is good news and bad news.
The blocking plugs provided a nice air tight seal, evidenced by the bad news bit where once the tube was hot enough to bend the pressure actually caused the tube to expand outwards and still didn't allow me to bend it in a semicircle.
So tried a 50" tube... basically the same result. Seems like the walls are too thin to provide support for the air pressure when hot enough to bend.
What did seem quite possible is that it may be quite practical to form a long arch from joined tubes if you can get the long tube uniformly heated.
Phil
Henedce
Apprentice elf
Have you tried hot water ?
I used hot water to bend small acrylic tube easily , not sure how it would go with such a large diameter though.
I used hot water to bend small acrylic tube easily , not sure how it would go with such a large diameter though.
I saw this vid and it looks to be just about the simplest method in existence to do full length curves of tubes. I'm sure someone will give it a go soon and say whether it works with this tubing.
How to bend PVC pipe to make a hoop house/plant tunnel
How to bend PVC pipe to make a hoop house/plant tunnel
ԆцряєсϮ
Senior elf
I just spent a couple of hours trying to bend these using various methods, sand, hot air etc.
It appears the walls arent thick enough to hold any sort of shape once you heat them enough to bend, with the sand the walls actually buckled outwards so unless someone has some sort hot roller set up where they can keep pressure on both the inside and outside of the walls while heating and bending then I reckon were stuck with straight pipes :-\
It appears the walls arent thick enough to hold any sort of shape once you heat them enough to bend, with the sand the walls actually buckled outwards so unless someone has some sort hot roller set up where they can keep pressure on both the inside and outside of the walls while heating and bending then I reckon were stuck with straight pipes :-\
Steve22537
Full time elf
The only other method that may be suitable is to cut them into segments with a drop saw.
Steve
Steve