|
Post by 1dave on Jan 15, 2018 8:13:06 GMT -5
it is easy to weld 2 fittings or pipes to each other. More complicated welding a flat plate to a pipe or fitting, heating the plate just around the edge requires way higher skill woofer. Or specific tooling. How about making an iron ring the diameter you want and setting it on top of a hot plate? set it for the exact temperature you desire, set the HDPE plate on top.
|
|
|
Post by MrP on Jan 15, 2018 8:36:27 GMT -5
it is easy to weld 2 fittings or pipes to each other. More complicated welding a flat plate to a pipe or fitting, heating the plate just around the edge requires way higher skill woofer. Or specific tooling. How about making an iron ring the diameter you want and setting it on top of a hot plate? set it for the exact temperature you desire, set the HDPE plate on top. Good idea-----------------------if you can cut and weld like jamesp................................MrP
|
|
jamesp
Cave Dweller
Member since October 2012
Posts: 36,159
|
Post by jamesp on Jan 15, 2018 9:02:53 GMT -5
How about making an iron ring the diameter you want and setting it on top of a hot plate? set it for the exact temperature you desire, set the HDPE plate on top. Good idea-----------------------if you can cut and weld like jamesp................................MrP it is easy to weld 2 fittings or pipes to each other. More complicated welding a flat plate to a pipe or fitting, heating the plate just around the edge requires way higher skill woofer. Or specific tooling. How about making an iron ring the diameter you want and setting it on top of a hot plate? set it for the exact temperature you desire, set the HDPE plate on top. Thought about that Dave. That is likely great way to weld a plate to a pipe. It would be a test though, not 100% sure that it would work. But most likely. I did buy a $65 blower driven hand held plastic welder; the Harbor Freight model. It compares to $300 units, fine tool. From what I have seen, the fry pan weld is 10 times overkill, way strong for a tumbler barrel. No doubts that a properly done weld with plastic welder and rod would be plenty strong enough. It would butt weld a flat plate to a pipe or fitting. Have not tried it yet....but gonna soon.
|
|
jamesp
Cave Dweller
Member since October 2012
Posts: 36,159
|
Post by jamesp on Jan 15, 2018 9:23:03 GMT -5
Just got pricing on 6" X 4" reducers. HDPE SDR 17 for $26.50 each. Weld a plate on the big end, cut 4 inch side short enough for a 4 inch Fernco cap to grab nicely. May hold 8 pounds rocks, not sure but close. Weld 1/2 inch thick Walmart HDPE butcher block to cap 6 inch open end. Should last many moons.
|
|
|
Post by MrP on Jan 15, 2018 9:53:58 GMT -5
I went to Harbor Freight to pick up one like that but they we out when I was there. I tried using a heat gun also but with the large heating area it doesn't work well on a seam. I got a 2' X 6' X 3/4" plastic cutting board at a used Restaurant Supply. The cutting board material reacts very different the pipe material. I am not sure, if because it is white, it looks like the surface is being burned but under that layer it turns clear. The black just gets glassy looking as it gets to melt temperature. The white and black seem to make a good join if you get it right but black to black is much better and easier...................................MrP
|
|
jamesp
Cave Dweller
Member since October 2012
Posts: 36,159
|
Post by jamesp on Jan 15, 2018 18:07:32 GMT -5
I went to Harbor Freight to pick up one like that but they we out when I was there. I tried using a heat gun also but with the large heating area it doesn't work well on a seam. I got a 2' X 6' X 3/4" plastic cutting board at a used Restaurant Supply. The cutting board material reacts very different the pipe material. I am not sure, if because it is white, it looks like the surface is being burned but under that layer it turns clear. The black just gets glassy looking as it gets to melt temperature. The white and black seem to make a good join if you get it right but black to black is much better and easier...................................MrP I can probably help you. I bet I made the exact same mistake. I also bought 3/4" white plastic from the restaurant supply. I noticed it was a bit greasier feeling and a bit more clear at the edges. I tried a practice weld on the stove, a chunk of pipe to it, edge to edge, 3/4 to 3/4. The white plastic did turn clear at the bead. Welded good. Then I took it outside to hit with hammer. This white plastic would crack some, not the other white plastic. First hammer blow it broke at the weld. About sure the 3/4" is polypropylene and not polyethylene. Those 2 are similar but no where near the same. It may be that restaurants use polypropylene also. The 1/2" white plastic I had laying around, it welded incredibly well, could not crack it nor break the weld. Welded easy. Not the polypropylene. I can post a close up photo of the 1/2" plastic that did so well. Check it out, note the gouges from hitting it with all I got: I hot air gun heated the top corner of the white plastic onto the side of the black pipe material. Then sawed thru it and the weld between black and white: Before sawing in half, after beating the heck out of it. first ever plastic weld. Hope this helps. I would do a test weld if welding foreign plastic and do a hammer test. Pipe to pipe always works so far.
|
|
jamesp
Cave Dweller
Member since October 2012
Posts: 36,159
|
Post by jamesp on Jan 15, 2018 18:24:02 GMT -5
How about making an iron ring the diameter you want and setting it on top of a hot plate? set it for the exact temperature you desire, set the HDPE plate on top. Good idea-----------------------if you can cut and weld like jamesp................................MrP The first time I sawed the 8 inch pipe I had a fence clamped to the saw. I removed the fence and clamped it back down on the saw. The 2nd time the cuts were not lining up ha ha and had to make several adjustments and cut an inch of pipe till the fence was lined up perfectly. Even after adjustments it was not cutting repetitive blade slot to blade slot. The way I solved that problem was to leave the pipe in the frying pan till it melted to a flat face. Created a giant bead on one side. So what, it welded well. Took a while to grind the fat bead off. I forgot to turn the burner off on this one, check out the monster bead.
|
|