|
Forming wire mesh cloth - how to compress a cylindrical shape?
I'm forming some wire mesh cloth - that part is going ok. The finished part needs to be compressed to fit into a pvc part - working it in by hand results in scratching and marking of the pvc. I'm looking for some ideas on how to compress the mesh part so it slips cleanly into the pvc part. There's a few pics in the dropbox: http://www.metalworking.com/dropbox/wire_screen.pdf |
Forming wire mesh cloth - how to compress a cylindrical shape?
On Mon, 8 Feb 2010 21:07:21 +0800, the renowned "Royston Vasey"
wrote: I'm forming some wire mesh cloth - that part is going ok. The finished part needs to be compressed to fit into a pvc part - working it in by hand results in scratching and marking of the pvc. I'm looking for some ideas on how to compress the mesh part so it slips cleanly into the pvc part. There's a few pics in the dropbox: http://www.metalworking.com/dropbox/wire_screen.pdf Stuff it into a stubby thin-walled open-ended tube (maybe with a ring or other handle at one end) shove the tube into the PVC and then withdraw the tube while pushing against the top of the screen so it stays seated in the PVC. (Sort of how I imagine how a tampon applicator would work). Best regards, Spehro Pefhany -- "it's the network..." "The Journey is the reward" Info for manufacturers: http://www.trexon.com Embedded software/hardware/analog Info for designers: http://www.speff.com |
Forming wire mesh cloth - how to compress a cylindrical shape?
On Feb 8, 8:07*am, "Royston Vasey" wrote:
I'm forming some wire mesh cloth - that part is going ok. The finished part needs to be compressed to fit into a pvc part - working it in by hand results in scratching and marking of the pvc. I'm looking for some ideas on how to compress the mesh part so it slips cleanly into the pvc part. There's a few pics in the dropbox: http://www.metalworking.com/dropbox/wire_screen.pdf Could you hold it on the outside of the PVC with a press-on stainless sleeve? Maybe cut a groove and wind wire around the screen to squeeze it in, then press the sleeve on to cover and secure the sharp ends. Or perhaps you can find a stainless key ring the right size. A retaining sleeve on the inside could split the pipe. If it really has to be inside maybe you could fold the rim back over itself over a tube mandrel before cutting it so it would snap into an internal groove. jsw |
Forming wire mesh cloth - how to compress a cylindrical shape?
On Feb 8, 1:07*pm, "Royston Vasey" wrote:
I'm forming some wire mesh cloth - that part is going ok. The finished part needs to be compressed to fit into a pvc part - working it in by hand results in scratching and marking of the pvc. I'm looking for some ideas on how to compress the mesh part so it slips cleanly into the pvc part. There's a few pics in the dropbox: http://www.metalworking.com/dropbox/wire_screen.pdf My thought would be to compress it around a mandrel. My first thought was using a ratcheting cargo strap, but chucking the mandrel in the lathe and wrapping rope around it might work well. Sort of how one makes springs on a lathe using something in the tool post to control the tension in the rope. Still another idea would be using something like a single wheel knurling tool to force the wire against the mandrel. Dan |
Forming wire mesh cloth - how to compress a cylindrical shape?
"Spehro Pefhany" wrote in message ... On Mon, 8 Feb 2010 21:07:21 +0800, the renowned "Royston Vasey" wrote: I'm forming some wire mesh cloth - that part is going ok. The finished part needs to be compressed to fit into a pvc part - working it in by hand results in scratching and marking of the pvc. I'm looking for some ideas on how to compress the mesh part so it slips cleanly into the pvc part. There's a few pics in the dropbox: http://www.metalworking.com/dropbox/wire_screen.pdf Stuff it into a stubby thin-walled open-ended tube (maybe with a ring or other handle at one end) shove the tube into the PVC and then withdraw the tube while pushing against the top of the screen so it stays seated in the PVC. (Sort of how I imagine how a tampon applicator would work). Best regards, Spehro Pefhany -- "it's the network..." "The Journey is the reward" Info for manufacturers: http://www.trexon.com Embedded software/hardware/analog Info for designers: http://www.speff.com Yeah, I toyed with that idea - like some of the old piston ring compressor sleeves for auto engines. The open end needs to be squeezed a little smaller than 16mm OD but the flat top end OD is fixed at 16mm and wouldn't fit through. |
Forming wire mesh cloth - how to compress a cylindrical shape?
"Jim Wilkins" wrote in message ... On Feb 8, 8:07 am, "Royston Vasey" wrote: I'm forming some wire mesh cloth - that part is going ok. The finished part needs to be compressed to fit into a pvc part - working it in by hand results in scratching and marking of the pvc. I'm looking for some ideas on how to compress the mesh part so it slips cleanly into the pvc part. There's a few pics in the dropbox: http://www.metalworking.com/dropbox/wire_screen.pdf Could you hold it on the outside of the PVC with a press-on stainless sleeve? Maybe cut a groove and wind wire around the screen to squeeze it in, then press the sleeve on to cover and secure the sharp ends. Or perhaps you can find a stainless key ring the right size. A retaining sleeve on the inside could split the pipe. If it really has to be inside maybe you could fold the rim back over itself over a tube mandrel before cutting it so it would snap into an internal groove. jsw You've given me an idea Jim, maybe I should "trepan" a slot into the end of the PVC, fill it with urethan and just push the screen into the urethane. Cheers. _________ |_ /------ _] | | | --- | |_ \------ _] |_________ |
Forming wire mesh cloth - how to compress a cylindrical shape?
wrote in message ... On Feb 8, 1:07 pm, "Royston Vasey" wrote: I'm forming some wire mesh cloth - that part is going ok. The finished part needs to be compressed to fit into a pvc part - working it in by hand results in scratching and marking of the pvc. I'm looking for some ideas on how to compress the mesh part so it slips cleanly into the pvc part. There's a few pics in the dropbox: http://www.metalworking.com/dropbox/wire_screen.pdf My thought would be to compress it around a mandrel. My first thought was using a ratcheting cargo strap, but chucking the mandrel in the lathe and wrapping rope around it might work well. Sort of how one makes springs on a lathe using something in the tool post to control the tension in the rope. Still another idea would be using something like a single wheel knurling tool to force the wire against the mandrel. Dan Mmm, thanks Dan, its only 16mm ( 5/8") in size - your approach is what I'd thought of if it was bigger - kind of like a mini strap wrench or band style ring compressor. |
Forming wire mesh cloth - how to compress a cylindrical shape?
On Feb 8, 9:01*am, "Royston Vasey" wrote:
... You've given me an idea Jim, maybe I should "trepan" a slot into the end of the PVC, fill it with urethan and just push the screen into the urethane. Cheers. * * * * *_________ * * * * |_ /------ *_] | * * * | | --- | * * * |_ \------ *_] * * * * |_________ That's how the hydraulic tank pickup filters that Northern sells are assembled. I know because I had to glue one back together. jsw |
Forming wire mesh cloth - how to compress a cylindrical shape?
Royston Vasey wrote:
"Spehro Pefhany" wrote Stuff it into a stubby thin-walled open-ended tube ... ... the flat top end OD is fixed at 16mm and wouldn't fit through. Do you *any* leeway here? If the flat top end could be 14mm, say, it would work nicely. The forming bar & die could be tapered & would work better than the straight ones. Bob |
Forming wire mesh cloth - how to compress a cylindrical shape?
Royston Vasey wrote:
I'm forming some wire mesh cloth - that part is going ok. The finished part needs to be compressed to fit into a pvc part - working it in by hand results in scratching and marking of the pvc. I'm looking for some ideas on how to compress the mesh part so it slips cleanly into the pvc part. There's a few pics in the dropbox: http://www.metalworking.com/dropbox/wire_screen.pdf Here's an idea if you don't need to do many in a hurry. Make a recess in a block of suitable material, maybe 15.5mm in diameter, and suitably deep. Have it split down the middle. Place the wire form in to compress it then fill the recess with water and freeze it. When frozen remove the former and drop the wire form and ice slug into your PVC part and allow the water to thaw. |
Forming wire mesh cloth - how to compress a cylindrical shape?
"Royston Vasey" fired this volley in
. au: Yeah, I toyed with that idea - like some of the old piston ring compressor sleeves for auto engines. The open end needs to be squeezed a little smaller than 16mm OD but the flat top end OD is fixed at 16mm and wouldn't fit through. Sure it will Roy... Make the "sleeve" out of multiple petals of thin sheet stock. Push the screen home, then slide out the shims one at a time. LLoyd |
Forming wire mesh cloth - how to compress a cylindrical shape?
On 2/8/2010 8:07 AM, Royston Vasey wrote:
I'm forming some wire mesh cloth - that part is going ok. The finished part needs to be compressed to fit into a pvc part - working it in by hand results in scratching and marking of the pvc. I'm looking for some ideas on how to compress the mesh part so it slips cleanly into the pvc part. There's a few pics in the dropbox: Tighten a hose clamp around it. Kevin Gallimore |
Forming wire mesh cloth - how to compress a cylindrical shape?
On Feb 8, 5:07*am, "Royston Vasey" wrote:
I'm forming some wire mesh cloth - that part is going ok. The finished part needs to be compressed to fit into a pvc part - working it in by hand results in scratching and marking of the pvc. I'm looking for some ideas on how to compress the mesh part One approach is to fix the wide end by electroplating, so it doesn't expand when removed from the mandrel. Keeping a mesh in shape this way is a standard tactic (among makers of electron lenses for scanning electron microscopes, anyhow). |
Forming wire mesh cloth - how to compress a cylindrical shape?
On Mon, 8 Feb 2010 21:07:21 +0800, the infamous "Royston Vasey"
scrawled the following: I'm forming some wire mesh cloth - that part is going ok. The finished part needs to be compressed to fit into a pvc part - working it in by hand results in scratching and marking of the pvc. I'm looking for some ideas on how to compress the mesh part so it slips cleanly into the pvc part. There's a few pics in the dropbox: http://www.metalworking.com/dropbox/wire_screen.pdf Think "tampons", Royston. vbg How about a teflon sleeve with an OD the size of the ID of the PVC to help guide the screen in? Or a pair of spring steel guides on sticks, curved tongs if you will. Questions: Do you later "inflate" the cup back to full inside diameter? What do you use to secure it to the PVC? And, last but not least, whatever are these used for? Another thought: If you were to compress the cup closer to final diameter, it might be easier to work with. It appears to have lots of gaps between the folds and OD. -- We don't receive wisdom; we must discover it for ourselves after a journey that no one can take for us or spare us. -- Marcel Proust |
Forming wire mesh cloth - how to compress a cylindrical shape?
On Mon, 08 Feb 2010 08:25:11 -0500, the infamous Spehro Pefhany
scrawled the following: On Mon, 8 Feb 2010 21:07:21 +0800, the renowned "Royston Vasey" wrote: I'm forming some wire mesh cloth - that part is going ok. The finished part needs to be compressed to fit into a pvc part - working it in by hand results in scratching and marking of the pvc. I'm looking for some ideas on how to compress the mesh part so it slips cleanly into the pvc part. There's a few pics in the dropbox: http://www.metalworking.com/dropbox/wire_screen.pdf Stuff it into a stubby thin-walled open-ended tube (maybe with a ring or other handle at one end) shove the tube into the PVC and then withdraw the tube while pushing against the top of the screen so it stays seated in the PVC. (Sort of how I imagine how a tampon applicator would work). Great minds think alike, Pete. g -- We don't receive wisdom; we must discover it for ourselves after a journey that no one can take for us or spare us. -- Marcel Proust |
Forming wire mesh cloth - how to compress a cylindrical shape?
"Larry Jaques" wrote in message ... On Mon, 8 Feb 2010 21:07:21 +0800, the infamous "Royston Vasey" scrawled the following: I'm forming some wire mesh cloth - that part is going ok. The finished part needs to be compressed to fit into a pvc part - working it in by hand results in scratching and marking of the pvc. I'm looking for some ideas on how to compress the mesh part so it slips cleanly into the pvc part. There's a few pics in the dropbox: http://www.metalworking.com/dropbox/wire_screen.pdf Think "tampons", Royston. vbg How about a teflon sleeve with an OD the size of the ID of the PVC to help guide the screen in? Or a pair of spr ing steel guides on sticks, curved tongs if you will. Questions: Do you later "inflate" the cup back to full inside diameter? What do you use to secure it to the PVC? And, last but not least, whatever are these used for? Another thought: If you were to compress the cup closer to final diameter, it might be easier to work with. It appears to have lots of gaps between the folds and OD. -- We don't receive wisdom; we must discover it for ourselves after a journey that no one can take for us or spare us. -- Marcel Proust Everytime I think tampons I'm reminded of UK's Prince Charles bugged phone call where he told I think it was Camilla Gorilla his bit on the side at the time that he "wished he was her tampon" - a nasty thought! :| The tongs is a good idea - I just made something similar using some crimpers: http://www.metalworking.com/dropbox/...creen_tool.pdf Once in place the screen springs back quite a bit, I still need some urethane - maybe sika 191, 293 ?? The black marine stuff anyway, that works really well on most things. The screen is a shield over a humidity sensor - to stop fingers and look nice more than anything else. I don't think there is a way to eliminate the folds and extra mesh / cloth. The cloth doesn't want to stretch enough so a degree of folding results. cheers. |
Forming wire mesh cloth - how to compress a cylindrical shape?
On Tue, 9 Feb 2010 11:45:46 +0800, the infamous "Royston Vasey"
scrawled the following: "Larry Jaques" wrote in message .. . On Mon, 8 Feb 2010 21:07:21 +0800, the infamous "Royston Vasey" scrawled the following: I'm forming some wire mesh cloth - that part is going ok. The finished part needs to be compressed to fit into a pvc part - working it in by hand results in scratching and marking of the pvc. I'm looking for some ideas on how to compress the mesh part so it slips cleanly into the pvc part. There's a few pics in the dropbox: http://www.metalworking.com/dropbox/wire_screen.pdf Think "tampons", Royston. vbg How about a teflon sleeve with an OD the size of the ID of the PVC to help guide the screen in? Or a pair of spr ing steel guides on sticks, curved tongs if you will. Questions: Do you later "inflate" the cup back to full inside diameter? What do you use to secure it to the PVC? And, last but not least, whatever are these used for? Another thought: If you were to compress the cup closer to final diameter, it might be easier to work with. It appears to have lots of gaps between the folds and OD. Everytime I think tampons I'm reminded of UK's Prince Charles bugged phone call where he told I think it was Camilla Gorilla his bit on the side at the time that he "wished he was her tampon" - a nasty thought! :| Heh heh heh. The tongs is a good idea - I just made something similar using some crimpers: http://www.metalworking.com/dropbox/...creen_tool.pdf Ah, good! Once in place the screen springs back quite a bit, I still need some urethane - maybe sika 191, 293 ?? The black marine stuff anyway, that works really well on most things. The screen is a shield over a humidity sensor - to stop fingers and look nice more than anything else. I don't think there is a way to eliminate the folds and extra mesh / cloth. The cloth doesn't want to stretch enough so a degree of folding results. Have you tried a press in the shape of those tongs? Place screen cup over mandrel and compress vigorously with tons of force to 'set' the folds tighter. Alternatively, have you thought of just using a disc of screen and a slightly longer piece of PVC, dadoing in the flat screen piece? You could even use a heftier screen gauge to keep fingers from damaging it. -- We don't receive wisdom; we must discover it for ourselves after a journey that no one can take for us or spare us. -- Marcel Proust |
Forming wire mesh cloth - how to compress a cylindrical shape?
"Larry Jaques" wrote in message ... On Tue, 9 Feb 2010 11:45:46 +0800, the infamous "Royston Vasey" scrawled the following: "Larry Jaques" wrote in message . .. On Mon, 8 Feb 2010 21:07:21 +0800, the infamous "Royston Vasey" scrawled the following: I'm forming some wire mesh cloth - that part is going ok. The finished part needs to be compressed to fit into a pvc part - working it in by hand results in scratching and marking of the pvc. I'm looking for some ideas on how to compress the mesh part so it slips cleanly into the pvc part. There's a few pics in the dropbox: http://www.metalworking.com/dropbox/wire_screen.pdf Think "tampons", Royston. vbg How about a teflon sleeve with an OD the size of the ID of the PVC to help guide the screen in? Or a pair of spr ing steel guides on sticks, curved tongs if you will. Questions: Do you later "inflate" the cup back to full inside diameter? What do you use to secure it to the PVC? And, last but not least, whatever are these used for? Another thought: If you were to compress the cup closer to final diameter, it might be easier to work with. It appears to have lots of gaps between the folds and OD. Everytime I think tampons I'm reminded of UK's Prince Charles bugged phone call where he told I think it was Camilla Gorilla his bit on the side at the time that he "wished he was her tampon" - a nasty thought! :| Heh heh heh. The tongs is a good idea - I just made something similar using some crimpers: http://www.metalworking.com/dropbox/...creen_tool.pdf Ah, good! Once in place the screen springs back quite a bit, I still need some urethane - maybe sika 191, 293 ?? The black marine stuff anyway, that works really well on most things. The screen is a shield over a humidity sensor - to stop fingers and look nice more than anything else. I don't think there is a way to eliminate the folds and extra mesh / cloth. The cloth doesn't want to stretch enough so a degree of folding results. Have you tried a press in the shape of those tongs? Place screen cup over mandrel and compress vigorously with tons of force to 'set' the folds tighter. I don't have much in the way of machinery so I've made do with what I have. The wire is 316 stainless and is quite "springy". An arbor press is on my wish list (along with a mill, guillotine, panbrake..........) Alternatively, have you thought of just using a disc of screen and a slightly longer piece of PVC, dadoing in the flat screen piece? You could even use a heftier screen gauge to keep fingers from damaging it. I can't quite visualise what you mean. I've tried a few different arrangements, the one I have come up with seems to be the best in terms of being simple to manufacture with the tools I have to hand. -- We don't receive wisdom; we must discover it for ourselves after a journey that no one can take for us or spare us. -- Marcel Proust |
Forming wire mesh cloth - how to compress a cylindrical shape?
"Royston Vasey" fired this volley in
: So why not use something ready-made, like this? http://www.mcmaster.com/#suction-strainers/=5qqxb3 Part # 44265K24 Poly large-particle suction screen. LLoyd |
Forming wire mesh cloth - how to compress a cylindrical shape?
"Lloyd E. Sponenburgh" lloydspinsidemindspring.com fired this volley in
. 3.70: "Royston Vasey" fired this volley in : So why not use something ready-made, like this? http://www.mcmaster.com/#suction-strainers/=5qqxb3 Part # 44265K24 Poly large-particle suction screen. LLoyd Or, more like what you're making -- part # 98755K15 LLoyd |
Forming wire mesh cloth - how to compress a cylindrical shape?
"Lloyd E. Sponenburgh" lloydspinsidemindspring.com wrote in message . 3.70... "Lloyd E. Sponenburgh" lloydspinsidemindspring.com fired this volley in . 3.70: "Royston Vasey" fired this volley in : So why not use something ready-made, like this? http://www.mcmaster.com/#suction-strainers/=5qqxb3 Part # 44265K24 Poly large-particle suction screen. LLoyd Or, more like what you're making -- part # 98755K15 LLoyd Thanks Lloyd, I looked & looked and could not find anything off the shelf that would work. It's hard to get the right mix of size / appearance & cost. Now I've got it sorted the they should cost me ~ $0.10 each. |
Forming wire mesh cloth - how to compress a cylindrical shape?
"Royston Vasey" fired this volley in
: "Lloyd E. Sponenburgh" lloydspinsidemindspring.com wrote in message . 3.70... "Lloyd E. Sponenburgh" lloydspinsidemindspring.com fired this volley in . 3.70: "Royston Vasey" fired this volley in : So why not use something ready-made, like this? http://www.mcmaster.com/#suction-strainers/=5qqxb3 Part # 44265K24 Poly large-particle suction screen. LLoyd Or, more like what you're making -- part # 98755K15 LLoyd Thanks Lloyd, I looked & looked and could not find anything off the shelf that would work. It's hard to get the right mix of size / appearance & cost. Now I've got it sorted the they should cost me ~ $0.10 each. I mailed you off-list with a suggestion, and the mail has bounced. Did you see the post about making an insertion sleeve out of several "leaves" of shim stock? After insertion, you draw out the leaves one-by- one, so the diameter of the "crown" doesn't matter. LLoyd |
Forming wire mesh cloth - how to compress a cylindrical shape?
"Lloyd E. Sponenburgh" lloydspinsidemindspring.com wrote in message . 3.70... "Royston Vasey" fired this volley in : "Lloyd E. Sponenburgh" lloydspinsidemindspring.com wrote in message . 3.70... "Lloyd E. Sponenburgh" lloydspinsidemindspring.com fired this volley in . 3.70: "Royston Vasey" fired this volley in : So why not use something ready-made, like this? http://www.mcmaster.com/#suction-strainers/=5qqxb3 Part # 44265K24 Poly large-particle suction screen. LLoyd Or, more like what you're making -- part # 98755K15 LLoyd Thanks Lloyd, I looked & looked and could not find anything off the shelf that would work. It's hard to get the right mix of size / appearance & cost. Now I've got it sorted the they should cost me ~ $0.10 each. I mailed you off-list with a suggestion, and the mail has bounced. Did you see the post about making an insertion sleeve out of several "leaves" of shim stock? After insertion, you draw out the leaves one-by- one, so the diameter of the "crown" doesn't matter. LLoyd Sorry Lloyd the email address is bogus. The external compressor approach seems to work ok. I can see how your suggestion of individual leaves would work, but in my case it may be problematic as the cup will sit into gooey urethane glue - the fingers may pull this out as they are withdrawn. Thanks for the suggestions Lloyd (& all others) |
Forming wire mesh cloth - how to compress a cylindrical shape?
On Tue, 9 Feb 2010 20:54:22 +0800, the infamous "Royston Vasey"
scrawled the following: Once in place the screen springs back quite a bit, I still need some urethane - maybe sika 191, 293 ?? The black marine stuff anyway, that works really well on most things. The screen is a shield over a humidity sensor - to stop fingers and look nice more than anything else. I don't think there is a way to eliminate the folds and extra mesh / cloth. The cloth doesn't want to stretch enough so a degree of folding results. Have you tried a press in the shape of those tongs? Place screen cup over mandrel and compress vigorously with tons of force to 'set' the folds tighter. I don't have much in the way of machinery so I've made do with what I have. The wire is 316 stainless and is quite "springy". An arbor press is on my wish list (along with a mill, guillotine, panbrake..........) Got a 1T arbor press? It might do the trick, but you'd still need dies. Alternatively, have you thought of just using a disc of screen and a slightly longer piece of PVC, dadoing in the flat screen piece? You could even use a heftier screen gauge to keep fingers from damaging it. I can't quite visualise what you mean. Think flat water faucet screen shape, glued into a dado in the end of the pvc fitting. I've tried a few different arrangements, the one I have come up with seems to be the best in terms of being simple to manufacture with the tools I have to hand. OK. Then maybe the next best thing would be to use a stainless hose clamp to better smooth out the wrinkles over the arbor. That in itself may make insertion into the pvc fitting easier. -- In order that people may be happy in their work, these three things are needed: They must be fit for it. They must not do too much of it. And they must have a sense of success in it. -- John Ruskin, Pre-Raphaelitism, 1850 |
Forming wire mesh cloth - how to compress a cylindrical shape?
In , on Wed, 10 Feb 2010
20:34:34 +0800, Royston Vasey, wrote: Sorry Lloyd the email address is bogus. That's definitely a wrong way of doing it. lid is one possible way of doing it correctly. -- ˜¯˜¯ Unlimited webspace - Unlimited bandwidth http://www.dreamhost.com/r.cgi?74713 |
Forming wire mesh cloth - how to compress a cylindrical shape?
Steve Ackman wrote:
In , on Wed, 10 Feb 2010 20:34:34 +0800, Royston Vasey, wrote: Sorry Lloyd the email address is bogus. That's definitely a wrong way of doing it. lid is one possible way of doing it correctly. Why? |
| All times are GMT +1. The time now is 12:08 AM. |
Powered by vBulletin® Copyright ©2000 - 2024, Jelsoft Enterprises Ltd.
Copyright ©2004 - 2014 DIYbanter