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Epoxy Resin - Non Traditional Uses
"Bob La Londe" wrote in message ... With all the epoxy gurus here I thought I would ask a question. Have any of you guys poured epoxy solids? Encased things in epoxy? My daughter said one of her friends said she wanted some paperweights for Christmas with fish in them or fish shaped paperweights or something like that. (Yes my daughter's friend is weird.) I thought I might buy some toy fish at the local toy store or whereever I can find something suitable and then pour them into some epoxy solids. I figured a cube, a tetrahedron, and maybe a dome. Making a mold for a sphere is not out of the question either, but I was thinking maybe just a hemisphere for number three. I can make molds out of wood or aluminum for the cube and tetrahedron. For a sphere or hemisphere I would probably have to go with wood. I was thinking if I go with aluminum I would polish the interior surfaces, put a tiny bit of clear RTV adhesive silicon in the seams and spray the inside with non flavored cooking spray to prevent sticking. Basically screw the pieces together. When the resin is hard remove the screws and knock the sides off. Then cut the bottom square and epoxy on a layer of felt. Any of you guys see any problems with that approach? For wood I was thinking I could make it similar to the aluminum, but coat the wood pieces with epoxy first. Would take longer because I would have to make sure the resin coating the wood was fully cured, and thick enough to machine smooth for drilling and assembling the mold. The advantage to wood is I could more easily make a sphere or hemisphere shape, and it would be a lot cheaper than a piece of aluminum thick enough to make a reasonable size sphere. You have any tips? Any Alternatives? Reasons why my idea is totally stupid? I have several gallons of two part epoxy left over from a previous project. I also considered milling some fish shapes out of wood and using them in the "paperweights", but I am concerned that escaping air might cause bubbles in the end solid. I suppose I could paint the shape with epoxy before encasing it. Try this link http://www.smooth-on.com/gallery.php...327&cPath=1271 |
#12
posted to rec.boats.building
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Epoxy Resin - Non Traditional Uses
On Thu, 03 Dec 2009 21:17:17 -0600, cavelamb
wrote: Bruce In Bangkok wrote: On Thu, 3 Dec 2009 12:57:01 -0700, "Bob La Londe" wrote: "cavelamb" wrote in message m... Bob La Londe wrote: With all the epoxy gurus here I thought I would ask a question. Have any of you guys poured epoxy solids? Encased things in epoxy? My daughter said one of her friends said she wanted some paperweights for Christmas with fish in them or fish shaped paperweights or something like that. (Yes my daughter's friend is weird.) I thought I might buy some toy fish at the local toy store or whereever I can find something suitable and then pour them into some epoxy solids. I figured a cube, a tetrahedron, and maybe a dome. Making a mold for a sphere is not out of the question either, but I was thinking maybe just a hemisphere for number three. I can make molds out of wood or aluminum for the cube and tetrahedron. For a sphere or hemisphere I would probably have to go with wood. I was thinking if I go with aluminum I would polish the interior surfaces, put a tiny bit of clear RTV adhesive silicon in the seams and spray the inside with non flavored cooking spray to prevent sticking. Basically screw the pieces together. When the resin is hard remove the screws and knock the sides off. Then cut the bottom square and epoxy on a layer of felt. Any of you guys see any problems with that approach? For wood I was thinking I could make it similar to the aluminum, but coat the wood pieces with epoxy first. Would take longer because I would have to make sure the resin coating the wood was fully cured, and thick enough to machine smooth for drilling and assembling the mold. The advantage to wood is I could more easily make a sphere or hemisphere shape, and it would be a lot cheaper than a piece of aluminum thick enough to make a reasonable size sphere. You have any tips? Any Alternatives? Reasons why my idea is totally stupid? I have several gallons of two part epoxy left over from a previous project. I also considered milling some fish shapes out of wood and using them in the "paperweights", but I am concerned that escaping air might cause bubbles in the end solid. I suppose I could paint the shape with epoxy before encasing it. A better choice is acrylic casting resin for jobs like this. It is generally crystal clear, but can be tinted or pigmented, or filled with a filler (sand, marbles, keys...) Any thickness (depth) of epoxy will likely go thermal on you and boil. That's what I was afraid of. One of the reasons I was considering aluminum as it transfers heat very efficiently, and I have some. I also have epoxy on hand which is why I was considering it. How about small batches, partial cure and then next pour? If you mix epoxy rich enough that it gets really hot the aluminum molds will probably not absorb heat fast enough. The reason is that the heat build-up actually causes the mix to react faster so it is somewhat of a circle. More heat faster reaction causing more heat... If I may add something here, Bruce? The heat buildup works from the inside - out. So absorbing heat at the outside isn't going to stop it from boiling in the middle. True. I should have said that. Cheers, Bruce (bruceinbangkokatgmaildotcom) |
#13
posted to rec.boats.building
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Epoxy Resin - Non Traditional Uses
"Bob La Londe" wrote in message ... With all the epoxy gurus here I thought I would ask a question. Have any of you guys poured epoxy solids? Encased things in epoxy? My daughter said one of her friends said she wanted some paperweights for Christmas with fish in them or fish shaped paperweights or something like that. (Yes my daughter's friend is weird.) I thought I might buy some toy fish at the local toy store or whereever I can find something suitable and then pour them into some epoxy solids. I figured a cube, a tetrahedron, and maybe a dome. Making a mold for a sphere is not out of the question either, but I was thinking maybe just a hemisphere for number three. I can make molds out of wood or aluminum for the cube and tetrahedron. For a sphere or hemisphere I would probably have to go with wood. I was thinking if I go with aluminum I would polish the interior surfaces, put a tiny bit of clear RTV adhesive silicon in the seams and spray the inside with non flavored cooking spray to prevent sticking. Basically screw the pieces together. When the resin is hard remove the screws and knock the sides off. Then cut the bottom square and epoxy on a layer of felt. Any of you guys see any problems with that approach? For wood I was thinking I could make it similar to the aluminum, but coat the wood pieces with epoxy first. Would take longer because I would have to make sure the resin coating the wood was fully cured, and thick enough to machine smooth for drilling and assembling the mold. The advantage to wood is I could more easily make a sphere or hemisphere shape, and it would be a lot cheaper than a piece of aluminum thick enough to make a reasonable size sphere. You have any tips? Any Alternatives? Reasons why my idea is totally stupid? I have several gallons of two part epoxy left over from a previous project. I also considered milling some fish shapes out of wood and using them in the "paperweights", but I am concerned that escaping air might cause bubbles in the end solid. I suppose I could paint the shape with epoxy before encasing it. Think I'd go this way and save myself $100s in time and materials: http://shop.ebay.com/?_from=R40&_trk...All-Categories 310 hits. |
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