Thank you all for your information. We don't have the time of the right printer to do investment casting, but that is an amazing method. we got out hands on...
I mistakenly allowed all remote comtent on my email client instead of only for a couple of sites that send email sales on computer equipment. I have sience...
Kerry, My Sparkfun blowers arrived yesterday, too. I will be building an appropriate burner this weekend, and will post the results to the group Monday...
OK- Sparkfun blower arrived Friday (yesterday)... runs well at 6-12v with fairly silent operation... Mikey- what tips do we need to purchase for the fuel...
Hennepin Technical College used to have (maybe still does) a foundry just a few blocks from Dunwoody. If not, you can make all the equipment you need for...
Shonda, There is a group of metalsmiths in the Twin Cities that promotes the metal crafts and we are doing a brass pour in Oct. in St Paul. Go to the...
... As long as the prints do not have undercuts you could like do a standard cope/drag sand casting of it. For shapes with undercuts you could directly cast...
Hi, My name is Shonda, I'm a student at Dunwoody College of Technology in Minneapolis, Minnesota. Were are doing a engineering project, CAD modeling original...
That's exactly what I used over the paste wax. By the way, smooth - on is absolutely the best stuff I've ever used (for making rubber molds). I use the...
Hello Lyle, Did you try a spray something like this <http://www.smooth-on.com/Release-Agents-for/c1123_1226/index.html> in lew of the paste wax? I've used it...
Not a bad idea Rupert. One of the main problems is getting the Johnson's wax between all the fins. Seems easy but there's bolt bosses and a spark plug boss...
Wonk, I totally agree. The round exhaust port on the Sparkfun blower is a huge advantage, and 16 CFM is a good output range. BUT, Dr. Frankenburner needs lots...
Hello Lyle, My words weren't clear and I assumed your using sodium silicate sand. Johnson's paste wax should work as long as you have complete coverage. I ...
Just thinking......... someone in a recent post said that was dangerous ;-) ............... Suppose you were able to coat the pattern with some sort of low...
Rupert, Thanks for the idea but the pattern is one piece. Today after work I used a masonery bit to free the pattern out of the sand which looked a little like...
Lyle, Just a thought. (I know that's dangerous) I understand your using a resin set sand. Would it be possible to use the fins to shape individual cores? Then...
Be sure your pattern fins are very smooth and clean, Clean well with alcohol and I would try some welders marker soap stone ground to a powder in a pencil...
I suspect the 'Spark Fun' blower will be the best all around blower something like 16 CFM with a 33mm round tube opening which should make it a snap to adapt...
Nelson, These are heads, not cylinders. They are old patterns that were used decades ago. I have made cylinder patterns on a wood lathe and they were cast in...
Wonk, I've ordered several blower fans in sizes from 1" to 3" and various CFM outputs; experiments will proceed in the order the fans arrive. I will be doing...
creepin I should have read you first message. If you want to pour very thin fins, you will need a core that when cured will release from your mold. Then you...
If you get the graphit spray it will not work because you need to burn in the graphite. Nelson Collar ________________________________ From: walter peterson...
I know that Caterpillar has a Graphite spray for lubing certain moving parts...you could probably find something like that at NAPA Â ... From: creepinogie...
JR, One problem is these are loose patterns which is one reason for my 4 threaded holes and rods method of drawing the pattern. I have used johnson floor wax...
I would think that the wax and silicone would stick to the sand, one thing I do on my troublesome patterns is spray them with a rubbing alcohol/graphite dust...
Folks, I'm casting a batch of air cooled heads with long deep closely spaced fins. In short, I'm having a hard time getting the pattern to release. I'm using...
