Published July 28, 2010
Blow Molding , Processes
Hey guys, sorry it’s been so long since I’ve last posted. Been traveling, working, etc… You know, all the usual excuses… Anyway, I’m trying to play a bit ‘o catch-up, so I’ll be posting stuff I bookmarked, but just haven’t had a chance to post about until now… Thanks for all the support!
So here’s something fun: This guy George Fereday decided it would be cool to build his own hand-held blow molding gun. This is a manual tool for molding what George describes as ‘polymorph’ thermoplastic, which melts at a low temperature (in this case, he uses boiling water). This seems a lot safer than wielding a hand-held extruder with the traditional hot melted thermoplastic at 390+ degrees. I found more info on polymorphic thermoplastics at Instructables.
His rig uses two air lines for inflating an extuded tube of plastic, much like a traditional extrusion blow molder does. The cool thing is that he built this into a hand-held mastic gun to allow him to inject the plastic with subsequent blown bubble into a mold in a way that would be too cumbersome a huge extruder. So, while in his demonstration he’s shown blow molding a little box-shaped part, you could potentially introduce this sucker into a mold in multiple places or from multiple angles.
Looks kinda fun, doesn’t it?
Published August 18, 2009
The Fat Tire Sand Bike designed by Mike Scarani, is a 21-speed, rear drive sand cruiser that uses disc brakes and an offset jack shaft to make the soft sand a bit more bearable to navigate. He designed it using no 3D CAD of any sort, but his knowledge based in mountain biking, architecture and a few CAD applications, gave him just enough passion to push the limits of drive train dominance. The layout was done on a piece of cardboard:
I did not use any CAD program even though I have some experience with CAD programs. I did all my initial design by hand sketches and then final layout on the cardboard. The primary reason, I guess, is that it was a fluid process. I did not know all of the components I was going to use at the start of the actual construction. I had a general idea, but you can see by some of the earlier photos how the overall frame design changed.
Check out the story on SolidSmack with links to the Fat Tire Instructable.
Published August 9, 2009
General , Materials
Tags: diy, goggles, how-to, leather
Tim Elverston is a designer, sculptor, artist, and founder of WindFire Designs, a studio where he designs and builds insanely beautiful custom kites and other artwork. So he decides he needs some goggles for the dust in the desert at Burning Man… So he decides to make them himself from an old leather jacket and two pieces of tempered and UV resistant glass out of some halogen lights.
Good goggles for the desert are hard to find and they are very expensive if you do… Once I worked out how to design them, the whole process took about 3 hours.
He’s posted the entire instructions on his blog. Here’s the complete collection of images and details.