Re: Thin refractory material
The Sagers wrote: > I don't know your exact > problem, but in a similar soldering situation, I just slid a piece of sheet > metal to act as a barrier. Vic. Thanks for responding. Out of expediency, I used your suggestion. Contrary to the pace of hobby work (where the longer it takes, the more joy you experience), this was for a work project and time is money. Worked well enough for my purposes. My client will never know. royce in SB
Re: Thin refractory material
Bill, and to all who responded with suggestions. Thanks. That's what I love about this list. A multitude of intelligent answers to a problem from people whose opinion is worth listening to. But this white out sugggestion is curious. Can't see how it would stand up to direct flame from a torch. Because I couldn't wait for the arrival of a mail-order product as the item (high end hardware for a window) has to go out tomorrow AM, I went ahead and used some .005 or so stainless steel shim stock to "shield" the other part. Only got a "slight" amount of discoloration on the "protected" part. Acceptable. But I ended up soldering the SS to the part and had to file it off with a very thin file. FYI, one thing I tried was "muffler repair tape", from Pep Boys. It's grey, loosely stranded (fiberglass) material that you're supposed to "soak" in some kind of clear liquid to "set" the heat resistant quality. I placed a few layers of the tape soaked in the liquid (after hardening) between the parts but it disintegrated within moments of direct flame. No match for the torch (propane). Don't recommend this tape for this purpose. Thanks again listers. royce in SB [EMAIL PROTECTED] wrote: > I have not tried it, but I have been told that White Out, does a good job, > the stuff for covering typing mistakes. Try it on a scrap piece, and let us > know. > bill
Re: Thin refractory material
Friends, Try www.smallparts.com. They sell a heat shielding compound, look under "H" on the web site. Their catalog is a "gold mine" source for many of the things we need for our hobby work. Casey Sterbenz >From: Royce Woodbury <[EMAIL PROTECTED]> >Reply-To: [EMAIL PROTECTED] >To: Multiple recipients of sslivesteam <[EMAIL PROTECTED]> >Subject: Thin refractory material >Date: Fri, 12 Apr 2002 15:35:55 -0700 > >Hi listers. I need some thin refractory material to protect one >part while silver soldering another in close proximity. Anybody >know of a source of 1/32 to 1/16" thick heat shielding material? _ Send and receive Hotmail on your mobile device: http://mobile.msn.com
Re: Thin refractory material
Plaster of paris works fine. Mold it around the joints you want to keep from melting, let it set up, and have at it. You can also just wet a bit of rag and wrap the joints. Common (or used to be) in jewelry work was to make a paste with water and rouge, or whiting (chalk, calcium carbonate) or loam (clay) and apply that to the joint to be saved. Your pickle will not clean these off so the old joints must be scraped clean before pickling. Also, do not get even a speck of these mixtures on the new joint or the solder will not flow. Of course, all these techniques also apply to protecting complete parts as well as just joints. What I use for protecting large areas is just the sheet material sometimes called nonbestos (different makers use different names) that you find in any hardware store. It's cheap and very effective for one time use. (Unlike asbestos or the ceramic sheet used for boilers and available from Sulpher Springs even as low a temperature as a propane torch generates will turn it to powder quickly. However, by the time it is powder, the job is done.) It's also stiff and somewhat brittle, Victor Lacy - Original Message - From: "Shyvers, Steve" <[EMAIL PROTECTED]> To: "Multiple recipients of sslivesteam" <[EMAIL PROTECTED]> Sent: Friday, April 12, 2002 6:21 PM Subject: RE: Thin refractory material > Bill's suggestion of trying White Out makes me wonder if plaster of paris > would function as a temporary heat shield. Maybe a plaster-soaked > patch could be formed over the area to be protected, and then soaked off > later. > > I am not recommending this. But I am curious whether anyone thinks plaster > of paris could work as a refractory material in this application. >
Re: Thin refractory material
Hi Royce, You may get by with material commonly used for our boiler lagging-FibreFax I think it is called. It's similar to asbestos in look/feel but a ceramic fiber product. I usually place it in my small crucible before I make a lost wax casting to protect the inner surface of the expensive crucible. Mine is about 1/16" and I can mail you a small piece. I don't know your exact problem, but in a similar soldering situation, I just slid a piece of sheet metal to act as a barrier. Also what might work is to coat the piece not to be soldered with investment material (which is used for making molds in the lost wax casting process). The problem with this material though is it is very corrosive because of its low ph. I also seem to remember a moldable ceramic product made especially to be a heatsink in soldering applications- may have been offered at MicroMark. You could probably get some at a Jewelry supply. Vic in CA - Original Message - From: "Royce Woodbury" <[EMAIL PROTECTED]> To: "Multiple recipients of sslivesteam" <[EMAIL PROTECTED]> Sent: Friday, April 12, 2002 4:41 PM Subject: Re: Thin refractory material > Hi Gary. What was the total thickness of composite ? > > royce in SB > > Gary wrote: > > > I got a heat shield at a plumbing supply house. > > It has two layers. A soft aluminum layer with some sort of insulating cloth > > attached. > > I just shape the material around what I am soldering. It saved me from > > setting fire > > to my house when soldering 40 feet of pipe with a bunch of valves and turns. > > Pipe > > was right against insulation and wood in many places. > > ~Gary - Eugene, Oregon > > > > > Hi listers. I need some thin refractory material to protect one > > > part while silver soldering another in close proximity. Anybody > > > know of a source of 1/32 to 1/16" thick heat shielding material > > > ? I looked in my wife's hair dryer and there is a metal shield > > > between the elements and plastic exterior, but then there is a > > > blower that carries the hot air away. I only need a couple of > > > square inches of the stuff and would be happy to buy some if I > > > knew where. (I checked at Air Liquide up the street (they sell > > > bottled gases and silversoldering supplies)and the thinnest > > > stuff they had was 1/8" - too thick). Any suggestions ? > > > > > > royce in SB > > > > > > > > > > > > > > > >
Re: Thin refractory material
About 1/4-1/8 inch Subject: Re: Thin refractory material > Hi Gary. What was the total thickness of composite ? > > royce in SB
Re: Thin refractory material
Royce, I read somewhere that regular toothpaste might protect the area. Another suggestion is to put a heat sink in the area to be protected. Dick G New Britain, CT On Fri, 12 Apr 2002 15:35:55 -0700 Royce Woodbury <[EMAIL PROTECTED]> writes: > Hi listers. I need some thin refractory material to protect one > part while silver soldering another in close proximity. Anybody > know of a source of 1/32 to 1/16" thick heat shielding material > ? I looked in my wife's hair dryer and there is a metal shield > between the elements and plastic exterior, but then there is a > blower that carries the hot air away. I only need a couple of > square inches of the stuff and would be happy to buy some if I > knew where. (I checked at Air Liquide up the street (they sell > bottled gases and silversoldering supplies)and the thinnest > stuff they had was 1/8" - too thick). Any suggestions ? > > royce in SB > > > GET INTERNET ACCESS FROM JUNO! Juno offers FREE or PREMIUM Internet access for less! Join Juno today! For your FREE software, visit: http://dl.www.juno.com/get/web/.
Re: Thin refractory material
On Fri, 12 Apr 2002, Royce Woodbury wrote: > Hi Paul. Thanks for responding. Where does one get mica ? > I know that Cumberland General Store carries it, a google should turn up their website. I beleive that Lehman's also sells it, their website is at: http://www.lehmans.com --- Paul Anderson geeky1!paul "Nature has been kinder to us than we had any right to expect. --- Freeman Dyson
RE: Thin refractory material
Where does one get mica ? Try www.antiquestoves.com
Re: Thin refractory material
Royce, Check with Sulphur Springs Steam Models. I purchased some Fiberfrax (sp?) from them a few years ago. It appears to be a ceramic fiber "felt" material about 1/16" thick. If I knew where I placed it, I'd send you some. Michael Martin http://www.panyo.com/steamups (SF Bay Area Steamup Images and Model Engineering)
Re: Thin refractory material
Hi Paul. Thanks for responding. Where does one get mica ? In correspondence with Gordon Watson re: meths-fired Philly boiler, he mentioned " 1/16" thick millboard" as a liner for the fire box that ducts the flame to the rear of the boiler. This would seem to be perfect, but I don't know where to get it or what to call it (in the US). royce in SB Paul Anderson wrote: > On Fri, 12 Apr 2002, Royce Woodbury wrote: > > > Hi listers. I need some thin refractory material to protect one > > part while silver soldering another in close proximity. Anybody > > know of a source of 1/32 to 1/16" thick heat shielding material > > ? > How about mica sheet? > > --- > Paul Anderson > geeky1!paul > "Nature has been kinder to us than we had any right to expect. > --- Freeman Dyson >
Re: Thin refractory material
Hi Gary. What was the total thickness of composite ? royce in SB Gary wrote: > I got a heat shield at a plumbing supply house. > It has two layers. A soft aluminum layer with some sort of insulating cloth > attached. > I just shape the material around what I am soldering. It saved me from > setting fire > to my house when soldering 40 feet of pipe with a bunch of valves and turns. > Pipe > was right against insulation and wood in many places. > ~Gary - Eugene, Oregon > > > Hi listers. I need some thin refractory material to protect one > > part while silver soldering another in close proximity. Anybody > > know of a source of 1/32 to 1/16" thick heat shielding material > > ? I looked in my wife's hair dryer and there is a metal shield > > between the elements and plastic exterior, but then there is a > > blower that carries the hot air away. I only need a couple of > > square inches of the stuff and would be happy to buy some if I > > knew where. (I checked at Air Liquide up the street (they sell > > bottled gases and silversoldering supplies)and the thinnest > > stuff they had was 1/8" - too thick). Any suggestions ? > > > > royce in SB > > > > > > > > >
RE: Thin refractory material
Paul, There could be problems with the water content, too, which is why I hope to hear some more comments. There may be issues similar to concrete. Regarding the brittleness, if it would work as a refractory material it would definitely be for one-time use.
RE: Thin refractory material
On Fri, 12 Apr 2002, Shyvers, Steve wrote: > > I am not recommending this. But I am curious whether anyone thinks plaster > of paris could work as a refractory material in this application. > Keep in mind, though, heat causes plaster of paris to become extremely brittle. --- Paul Anderson geeky1!paul "Nature has been kinder to us than we had any right to expect. --- Freeman Dyson
Re: Thin refractory material
On Fri, 12 Apr 2002, Royce Woodbury wrote: > Hi listers. I need some thin refractory material to protect one > part while silver soldering another in close proximity. Anybody > know of a source of 1/32 to 1/16" thick heat shielding material > ? How about mica sheet? --- Paul Anderson geeky1!paul "Nature has been kinder to us than we had any right to expect. --- Freeman Dyson
Re: Thin refractory material
I got a heat shield at a plumbing supply house. It has two layers. A soft aluminum layer with some sort of insulating cloth attached. I just shape the material around what I am soldering. It saved me from setting fire to my house when soldering 40 feet of pipe with a bunch of valves and turns. Pipe was right against insulation and wood in many places. ~Gary - Eugene, Oregon > Hi listers. I need some thin refractory material to protect one > part while silver soldering another in close proximity. Anybody > know of a source of 1/32 to 1/16" thick heat shielding material > ? I looked in my wife's hair dryer and there is a metal shield > between the elements and plastic exterior, but then there is a > blower that carries the hot air away. I only need a couple of > square inches of the stuff and would be happy to buy some if I > knew where. (I checked at Air Liquide up the street (they sell > bottled gases and silversoldering supplies)and the thinnest > stuff they had was 1/8" - too thick). Any suggestions ? > > royce in SB > > > >
RE: Thin refractory material
Bill's suggestion of trying White Out makes me wonder if plaster of paris would function as a temporary heat shield. Maybe a plaster-soaked patch could be formed over the area to be protected, and then soaked off later. I am not recommending this. But I am curious whether anyone thinks plaster of paris could work as a refractory material in this application.
Re: Thin refractory material
I have not tried it, but I have been told that White Out, does a good job, the stuff for covering typing mistakes. Try it on a scrap piece, and let us know. bill
