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Everything posted by Kang

  1. Kang

    Bones Black Owlbear - 44001

    Best owlbear paintjobs I've seen, period. Kudos! Kang
  2. Kang

    hide Guitar Strap

    Awesome stuff! Castings look great, your friend should be really happy with all this. Kang
  3. Great job! "Now we will begin the dance. Remember, child, this is not the dance of the Westeros we are learning, the knight's dance, hacking and hammering, no. This is the Braavo's dance, the water dance, it is swift and sudden. All men are made of water, do you know this? If you pierce them, the water leaks out and they die." - George R. R. Martin, A Game of Thrones Glitterwolf, you were right, he is facing a wolf. A direwolf. A pup that walks in two legs; her name is Arya Stark. Kang
  4. Kang

    Owl Coin

    Sounds like he just needed the night and a closer look to realize what you'd done here. Great job!
  5. Bit of an update, since I haven't posted anything here in a while... The house number plaque I made for my sister is now installed on the front of her house and she seems satisfied with it: Also, I have completed another aluminum bronze choppy thing project. A pipe-tomahawk this time. Chose to make the rear-facaing bit a smoking pipe instead of a spike or something because new laws here in Canada had everyone talking about legalized wacky tobaccy up here constantly for a few weeks and months there. I was hoping to maybe try my hand at making some stuff to sell sometime down the line and that's the idea I came up with. The pipe-hawk casting needs 2 cores; one for the eye where the handle fits in. And one for the pipe bowl. Cores are made in molds called core boxes, so I had to make 2 core boxes. I think I showed a bunch ch of pictures of how I made the core box for another one of my bronze axes somewhere above, so here's just one, of the new corebox for the bowl core: I also made a little video demonstrating how I make these coreboxes using Lego, plasticine (cheese wax works in a pinch too but not as nice) and hydrostone plaster, if anyone is interested: https://youtu.be/HHkvnVLBOLc The bowl core box was made around a piece of dowel I sanded down the end of I to the shape I wanted for the pipe bowl, but the core for the eye is shaped like a sacrificial tomahawk handle I cut up for this project. I ordered a few of them, they're pretty cheap and I'm no woodworker, but I wanted to be sure the handles that company sells are all roughly similar so they'd fit the same tomahawks well. I used the same chunk of handle that I made the second corebox with to build the actual foundry pattern's core prints, which are projections off a pattern designed for a hardened sand core to fit in so that they are supported by the mold in place when the metal is poured in. I scuplted the eye of the tomahawk pattern onto the core print using a 2-part epoxy putty (an old trick I learned from my gaming miniatures hobby, I told the guys at the casting forums ). And I used scraps of old furniture and terrain basing supplies I found in my scraps bin to use for making the blade and bowl. Here are some pictures of the patternmaking process: The patternmaking video I made covers it up to this point: https://youtu.be/ErOADrMfHEE But I had second thoughts and ended up beefing up the blade-to-eye joint with more putty before I cast it: Couple more coats of paint and it was time to cast this thing! Of course there is video of that too: https://youtu.be/NRFE_x-rKpM And some still pix as well... The crazy colours faded as the ingots cooled down. Couple small casting defects... Bowl drilled through to the eye. I'm still figuring out how I'm gonna drill a long straight hole through a hawk handle to make the pipe functional. I'm more interested in throwing it at targets and chopping down trees with it than that though. On its handle, loosely. After grinding out some of the booger holes (actual foundry terminology) And finally, after a bunch more sanding, sharpening, and peening to work harden the edge: Here it is next to its older brother, who could use a bit of cleaning and sharpening since I actually use it quite a lot for doing work around the yard. That's it for now. I'm planning on turning the pattern into a match plate, which means mounting it on a board that will allow me to make pipe-hawk molds much more quickly and easily. Not sure how long that will take but I'll post more when there's something to post. Meanwhile I also have a new (used) small electric kiln that needs to have it's controls updated from an on/off switch to a k-tyoe thermocouple and PID controller etc., which will allow me to program it so that it will be useful for burning out small molds for lost wax casting or.maybe even some winter aluminum casting if I can get a safe place to use it set up in the basement. It did come with a large number of small crucibles that fit inside it, plus another larger #6 clay-graphite crucible that looks brand new and is privately worth more than I paid for the whole bunch. And a bunch of cast aluminum ingots. And here I thought I was.the it person in this region crazy enough to play around with molten metal! Not so; I got to meet French Canadian future me when I picked this thing up... You gotta love Kijiji (aka Canadian Craig's List)! Pretty sure I'm not gonna get away with keeping it in the living room for much longer, so that is my main concern right now... Kang
  6. Never really checked out this section much before, but it seems like a good place to put some pictures of the stuff I've been working on over the past few years. I'll start with the very beginning of my molten metal obsession which began 3 years ago during the 13th annual "Boys' Camping Weekend". Every year we try to have some sort of unusual and memorable activity planned. That year, it was seeing if we could get aluminum to melt in our campfire. Someone brought a crucible from the internet. Someone else brought a novelty ice cube tray. Yet another guy somehow got totally hooked on this molten metal stuff, and that someone would be me. Aaaand yet another someone brought his video camera AKA phone: https://vimeo.com/75917079 So that was it for me, I dove in headfirst and haven't really surfaced since, from the strange world of backyard metal casting. So, you see those ugly little skullules in the video? Pretty cool, but definitely hideous and not as intended, right? I just got back from Boys' Camping Weekend #16. Oh, how far I have come in 3 years! I brought a homemade bronze axe with me this year, so I could field-test it right back where it all started, by using it to cut wood to feed the very same fire that was responsible for its creation. First some background on the bronze axe though. I was inspired to make it by George R. R. Martin's world of Westeros, where in ancient times the First Men crossed the Narrow Sea wielding bronze weapons to make war on the Children of the Forest. I don't know much about axes, but I did some googling to come up with a cool looking shape that would be believable as a battle axe yet still useful for chopping wood, which I am more likely to find myself doing. Then I made a wooden pattern to use in making the sand mold needed to cast it. Here are the two halves of the "split pattern" - each part goes in one half of the mold to form the mold cavity, then they patten is drawn out of the mold, the mold is closed, and metal gets poured in: (not the original pix, those showed the pattern halves repainted and sealed for glossy slick non-sand-stickiness) Here is the mold just after I poured in the bronze: (See? The mold is literally a 'sandbox', so I know I'm in the right section...) Here is the raw casting just after I shook out the mold. This side of the casting was in the cope, which is what we call the top half of the mold though I am not sure why. You can see the gating and 2 risers and the sprue here as well as the axe blade. Note the shrinkage on top of those risers. That is their function, to feed their own molten metal into the cast part, to compensate for the shrink that would otherwise occur on the casting itself. They will be remelted when I pour my next bronze casting: Drag (bottom half of the mold) side. You can see the remains of the hardened sand core I had to insert into the mold to create the hollow "eye" where a handle wiould later be fitted. I used sodium silicate (AKA waterglass) based woodstove gasket cement to bind the core, then catalyzed the hardening reaction by baking it in my oven on low for 15 minutes. The core was made in a small plaster mold I made from the core prints on the pattern before they got attached to it, which is visible above. Note, there is a visible screwdriver shaft-thick vent through the core in this pic, to allow gases to escape the mold Here is a big ingot I poured with the leftover bronze, to be remelted next time along with the risers, sprue, and gating from this casting. And here is it pretty much finished up. I put a sledge hammer handle from the hardware store on it because otherwise it would not have been ready for this year's camping weekend, but I did come home with a nice piece of hickory from our campsite that I'll use to make a new handle, now that I have had a chance to field-test the axe. I also ground off the flashing around the parting line and sanded the blade a little shinier than how it came out of the sand. There is a lot more sanding to do before it has a golden mirror-finish, but in terms of usefulness, it is all finshed up here in this pic. The edges were hardened by hammering on them. Bronze does not need to be heated up like steel for this sort of forging, and most bronzes are not hardened by heat treatment. Now. So far I have been discussing this like I used traditional bronze-age bronze - alloys of copper and tin. But the fact is, nowadays "bronze" refers to many different alloys of copper. The alloy I chose for making blades is aluminum bronze, AKA alloy C95400 (which in fact CAN be hardened by heat treatment, though I am not equipped for that). The aluminum bronzes are the toughest of the copper alloys, so they should make the most durable bronze blades, which should be able to hold their edges. Here's where the campsite field test comes in... Our usual campsite is surrounded by a forst of hickory and oak and maple (and the lake), so basically a lot of hardwood. We prefer to burn the fallen hickory logs, because the smoke smells nice, but mostly because one of those hickory logs burns hot (hot enough to melt aluminum, see video clip above) and burns all night long. I knew I wanted to use a big dry super hard thigh-thick hickory log to test the edges on my super hard (for a bronze) axe, so that is exactly what I did when we found on that size leaning dead against a couple other trees (rather than green and growing or rotting on the ground). (I have been unable to find the pix to replace the rest of these broken links, but the most interesting ones in this post are now restored... on to the next post. I'm not saying it was easy going, or even easier than using our camp saw... But the camp saw is also easier than using a store-bought forged steel axe, and what really matters here is that the First Men bronze axe works, and it held its edges! Both blades were used, and both came through it completely undamaged; the edges are as straight and sharp as when we began chopping ("we" because we took turns), no visible shiny spots or bumps or nicks can be seen or felt. I call that a 100% success, and I call this the greatest thing I have made in my backyard foundry so far, by far. Here are a few gratuitous fire shots of the burning test log keeping our campfire burning hot all night long: So that is my latest creation. I have posted my cast aluminum weirwood tree here somewhere before and I think my little rabbit-robots. I'll try to link those here if I can find those older posts. Otherwise, let me know if you guys want to see more and I can dig up some more pix of my castings. Spoiler warning: mostly it is a lot of aluminum skulls. Or you could try googling "Ghost Vines Band". It's not my band, it's one of my camping buddies, and I just learned he's wearing one of my skull belt buckles in one of their promo pix which I had no trouble finding. But I also have pictures of all the foundry equipment I've built over the last 3 years, everything from my oil-fired melting furnace (Balerion the Black Dread) to Big Bucket Mull the sand mixing machine to my cast aluminum sand rammer (King Robert's Rammer) to Lightbringer, my homemade waste oil burner, and on and on. So it's not ALL metal skulls Not bad for some crazy Canadian computer programmer tinkering in his shed for kicks, eh? I even got an "order" for another bronze axe from one of the guys I camp with, which is a huge step for me. This has always been just a hobby, but this opportunity will allow me to try and make an even better axe without having to pay for the bronze myself. Who knows, maybe someday I'll be able to make my casting hobby start paying its own way in the world instead of costing me money... Kang
  7. Kang

    Boxer Rebellion: Box-Turtle Folk, WIP

    What does TMNT have to do with any of this?! Clearly these are adolescent genetically modified martial arts tortoises. A totally different thing. They are coming along great, your idea to cast the partially sculpted armatures is really paying off! Imagine all the extra work if you'd had to sculpt their shells indivudially... Can't to see the rest of them coming together! Kang
  8. Kang

    Boxer Rebellion: Box-Turtle Folk, WIP

    I love ravens too, especially when they are into mimicry. (Although they are amazing stunt flyers also) I ran across this one urban raven near my old office, sitting on the street corner eating a dead pigeon. While mimicking pigeon calls between bites! Same bird a couple weeks later was sorting the contents of a trash can on the same corner. When he would pluck out something inedible, he'd wait for a human to pass by and throw it at their feet to make them jump out of the way. A real jerk, but talk about personality! The ones nesting near my place are usually too busy getting harrassed by crows to really cause any trouble. Those crows are just jealous... Kang
  9. Kang

    Owl Coin

    Heh. My Dad is a 'Rald too. 7pt! I can barely even read text that small without my readers on. Great job. Waxes look great; the finished pieces ought to go over really well. Kang
  10. Kang

    Owl Coin

    Ack! Resent. Sorry about that. Kang
  11. Kang

    Owl Coin

    Good idea. TaleSpinner, I just PM'ed you a link to one such manufacturer that offers a discount to those who use their stamps as foundry patterns. Kang
  12. Kang

    Owl Coin

    That is an amazing gift idea, not to mention a great use of that extra bronze you've got left over now that you are using pewter for the armatures! Kang
  13. Kang

    Boxer Rebellion: Box-Turtle Folk, WIP

    Loving the druid so far! She's gonna be super cool. Too bad about the brazing and pewter not working out like you hoped. You may not need a full burnout of the investment to cast lower temp. alloys. I'll ask a friend who does a lot of small pieces with lost wax if he's ever done anything with pewter and report back any info I can dig up. He's been really busy lately renovating his new very old house though; could take some time to hear back... Update - I heard back: Dave says for pewter, burnout is as usual for your flask size and investment type, but pour when the flask has cooled to 260C. Hope that helps, good luck! Kang
  14. Here is another bronze casting with liver of sulphur patina, alongside the belt buckle. Same bronze. Same LoS. Totally different colour! Weird. I did do one thing differently: the belt buckle was sealed with clear spray polyurethane, and the ashtray was sealed with wax, which IMO gave a much nicer finish due to not being so glossy. Maybe people will find the pic helpful as a painting reference. Most time people add a patina effect to minis, it's a blue-green verdigris type of patina. From what I have noticed anyhow. Fact is, patinas come in a wide variety of different colours, and not every dunegon lord cares so little for his art collection that he will neglect his statues until they look like they have been crying blue-green verdigris tears for a couple of centuries. :) Anyhow, there is video too. It shows what the castings looked like before and after as well as how I applied the patina. https://youtu.be/4Bw2TqCFygU Note, liver of sulphur is NOT non-toxic. I am not sure if it would work on pewter if someone wanted to try shading a mini this way, perhaps it would. For sure it is used on silver and some other copper alloys. If you try it, maybe try applying it cold, which may be slower. Pewter melts at a much lower temperarure than bronze. That said, I was aiming for about 200F with my weed burner torch which should be safe dor metal minis (I think), but I got parts of it hotter than that for sure at certain points in the process. Kang AKA Tobho son of Timmett
  15. I finally got a chance to try my hand at patination! Here is a liver of sulphur patina applied selectively using a hot process (there was a weed burner torch and a lot of sizzling involved, what fun!) to one of my silicon bronze skull belt buckles. To add shading, so to speak. For the highlights, I buffed the patina off first with a scotchbrite pad, then more selectively with a wire brush drillbit. Simple as that. Then once it has cooled, a coat of spray polyurethane to seal the piece and stabilize the patina. That came out a bit glossier than I'd hoped, but I can live with that. Wax would be the more typical choice of sealer; I used what I had handy. Let me know what you think! Kang AKA Tobho son of Timmett
  16. Kang

    Neutralizing Gloss Varnish?

    Dullcote and similar sprays can go glossy or satin if you are like me and tend to apply sprays too thick. I switched to RMS matte sealer rather than keep struggling with spray cans. Works great, thin to taste; just make sure to always mix it really well before use or the whole bottle will go bad on you eventually. Brush on primers for me as well. Kang
  17. Here is testing the sand, part 2 of 3: https://youtu.be/Ne086_NHbjQ And here is part 3 where I finally nail down a recipe that really works. You've already seen the results, the bronze skull pic in the previous post: https://youtu.be/BtRTArVb2lE That's all for now... Kang
  18. Well, the testing and tweaking of the new molding sand is complete. I have gone from crumbly sand producing bronze pieces encrusted with sand like this: To nice and sticky sand producing nice clean smooth castings like this: The mold ran out one side when the hydrostatic pressure of the molten bronze caused the top half of the mold to float. I thought the casting was lost for sure, but a moment later just before pouring ingots I remembered the whole part was molded in the bottom half... Figuring the metal that ran out would have frozen by then and blocked the gap, I resumed pouring and somehow the casting was saved! Not one bit of burned on sand. Not one little bit of flashing either. Umm, unless you count that runout. :) Video of part 1 of the sand testing follows. Have not yet edited the next part. https://youtu.be/77xeLY18Nas Kang
  19. Kang

    Boxer Rebellion: Box-Turtle Folk, WIP

    Too bad the bronze you got isn't cooperating so well for making the armatures. Have you tried annealing them to soften the bronze so it is easier to work? I know it works for copper... Kang
  20. Kang

    Sculpting and casting

    Awesome! So did you print the zodiac stuff with wax filament, or do lost PLA casting, or did you print them then make a silicone mold to cast the waxes in? However you did it, the castings look great! Kang
  21. Love the pony, great job! Kang
  22. I'm more angry at myself for pulling a dumb move out of nothing more than just laziness (not wanting to have to melt more bronze after pouring) than I am in pain. No signs of infection so far thank goodness, I'm keeping a close eye on it. I was taking to my friend Martin from Australia (aka Olfoundryman on YT) and he told me he'd gotten a teaspoon of cast aluminum down his shoe once which took 6 weeks to heal. Mine happened about a month ago now and the wounds are smaller than they started out, but still very much holes in my foot. The short video of the spill I linked above is unlisted, I just uploaded it to show friends who are into this stuff in the hopes it might keep them from making the same mistake. I've since edited a longer video about the accident with a lot more fire and molten metal. Same message, but maybe more entertainment... https://youtu.be/Fq9i9WRuIrA How do I like the Everdur? I love it. Even though every sand casting I've tried to use it for has been a failure, it's amazing stuff. I went to skim the dross of the first pot I melted before pouring, and there just wasn't any... The surface of the melt looked like an orange-yellow hot mirror already! One of those molds actually was an attempt to cast a silicon bronze axe... I know a guy who really wants one shaped like mine who asked me if I could make one for him in everdur. He wants some kind of bronze cap to go on the other end of the handle too, something with skulls on it. Pretty sure it's just going to be a wall hanger, so holding an edge well would be nice, but not really necessary in this case. I haven't designed that cap yet, so I've got some work to do there... So while those were all test castings, if that one had worked it would have been really nice... Since then I've made some adjustments to my molding sand. The new recipe is 2% calcium bentonite clay, 2% sodium bentonite clay, 1% dextrin, 1/2% "sea coal" (actually finely ground bituminous coal dust, should be similar), balance fine dry screened silica sand. The addition of the dextrin made a huge improvement in my sand's green strength. I haven't had a chance to try casting anymore of the bronze to see if the seal coal works to stop the sand from sticking to it. Even the dextrin may help with that. My old sand from the foundry supplier doesn't do that, so I know it can be fixed... Here are a couple of test castings in aluminum from the sand after I tweaked the recipe: (Other side says "drink beer" if you hadn't guessed, lol.) They look a bit rough but some of that is from the rough patterns I used to make the molds (cheap imported cast iron from the hardware store once again, like a lot of my test patterns. They work, but cast aluminum might not be the best choice for bottle opener metal). However the silica sand I used to make the new greensand is a bit more coarse than my old sand, so that may also be a factor. I'm planning to cast one of my really smooth patterns next to see how smooth of a casting the new sand is capable of. I also learned I had been mulling my sand in the wrong order (mixed all dry ingredients, them mulled in the water). Should have been mixing the sand and water THEN mulling in the binders and other additives. Anyhow, just need one or two more tests to check how the sand works for bronze now, and for smoothness.
  23. Was pouring more castings just to test my sand, big dummy that I am sometimes, I chose to fill my crucible right to the top with bronze because I did not want to have to take the time to melt a second pot of bronze. A #12 crucible brim-full of anything hot is too dangeous, but full of bronze it's also heavy enough to be hard to control. Splash! Hello 3rd degree burns on my right foot. Luckily I had my leather steel toes on or I'd be an even bigger dummy with it 1 foot. Shoes took no damage, the worst 2 of the 3 burns happened right through the leather in the amount of time it took for 2 small molten BB's to bounce off my shoe. Video shows my crispy feet, don't click if you're squeamish about feet or seeing fresh burns. Talespinner, please take note and learn this painful lesson the easy way! https://youtu.be/D2gZ__5kIBQ I did pour all 3 molds in bronze then melted a pot of aluminum for the last test casting of the day before I went in for bandaids and beer. All the sand castings were failures, but I got some good data about the new sand. Namely, it does stick to castings more than my old sand does, and it does not have the same green strength (ie. stickiness). Now researching sand additives I can use to correct these... Such as sea coal (bought a bag of bituminous coal dust - a rough equivalent - from a local blacksmith whose existence I just discovered) and dextrin (baked cornstarch, made some but stank the house up because our oven is hotter than it says it is) and a different type of bentonite clay (calcium bentonite) than what I had used as a binder in the sand I made (sodium bentonite). The clay is for the strength and the others are to stop the sand burning onto castings. This was 2 weeks ago. Foot is healing well but slow. I'm back in socks and shoes now, no more wearing my slippers to the office like last week! :) Kang
  24. Kang

    Boxer Rebellion: Box-Turtle Folk, WIP

    Wow, haven't checked in for several weeks, so much progress! A dragon shaped helmet sounds very cool... Really though, I'll be happy enough no matter what, as long as they actually use their weapons on their enemies, not just to cut the rope that causes the chandelier to fall and entangle Rocksteady and Bebop. :) Kang