[Noisebridge-discuss] Who wants Kilograms of Shapelock?

[Michael Shiloh]

One of my students cut gears out of plywood with a hacksaw. Crude but 
effective...

Lee Sonko wrote:
> 
>>You might try delrin...
>  
> Ah, that's the rub. I'm not using CNC to cut the gears. I want to use 
> the simplest tools possible. If I had the class use CNC, it would become 
> a class in CNC operation. This is a class in the theories of mechanics 
> and kinetics; how to get "stuff" to move in interesting ways. So I need 
> some universally easy material to work in. That's why we're using foam 
> core right now. I want them to be able to fashion their own gears, cams 
> etc with their own hands persay so they can get a hands-on feel for what 
> they're building. I could buy lots of parts but that would avoid much of 
> the basic hands-on-edness that I'm trying to impress on them.
>  
> I envision them squishing shapelock in their hands, pressing it into 
> gear molds, stretching it into shape by hand.
>  
> I want to use Phun (the 2d physics simulator) but for real.
>  
>  
>  
> *From:* Corey McGuire [mailto:coreyfro at coreyfro.com]
> *Sent:* Friday, March 12, 2010 1:12 PM
> *To:* Lee Sonko
> *Cc:* NoiseBridge Discuss; Orb Swarm
> *Subject:* Re: [Noisebridge-discuss] Who wants Kilograms of Shapelock?
> 
>     You might try delrin.  It's great for gears because it is hard and
>     REALLY low friction.  Are you using CNC to cut the gears?  Inkscape
>     has an AWESOME built in gear tool.  I used it on the Techshop laser
>     engraver to GREAT effect (acrylic.)
> 
>     On Fri, Mar 12, 2010 at 1:08 PM, Lee Sonko <lee at lee.org
>     <mailto:lee at lee.org>> wrote:
> 
>         I'm in for $10 at up for $15/kg
>          
>         I'm trying to find a better material to use for the Mechanical
>         Sculpture classes I teach at the Crucible. Right now we
>         generally cut gears, cams and levers out of foam core. It's
>         easy, safe and inexpensive. But it's foam core and... well it
>         kinda sucks. If I taught mechanics in metal, we'd spend all our
>         time learning how to use the tools to work the metal; the same
>         goes with wood :-(. Maybe Shapelock will fit the bill: easy to
>         work and re-work with inexpensive tools, safe, inexpensive,
>         fairly sturdy when cool.
>          
>         Lee
>          
>          
>         *From:* noisebridge-discuss-bounces at lists.noisebridge.net
>         <mailto:noisebridge-discuss-bounces at lists.noisebridge.net>
>         [mailto:noisebridge-discuss-bounces at lists.noisebridge.net
>         <mailto:noisebridge-discuss-bounces at lists.noisebridge.net>] *On
>         Behalf Of *Corey McGuire
>         *Sent:* Friday, March 12, 2010 11:58 AM
>         *To:* NoiseBridge Discuss; hackerdojo at googlegroups.com
>         <mailto:hackerdojo at googlegroups.com>; Orb Swarm; Chris Tacklind
>         *Subject:* [Noisebridge-discuss] Who wants Kilograms of Shapelock?
> 
>             Instead of buying the name brand material for $1.50 an oz, I
>             am looking for a source of CAPA 6800 at $10 a kg or about
>             $0.30 an oz.  I might need to get this in a 20kg volume
>             (that's right, I'm measuring volume in grams!)  That means a
>             $200 purchase.  maybe more with shipping and distributor
>             specific pricing, but I have it on authority that $10 a KG
>             is not unreasonable.
> 
>             Anyone who knows of a source, please help me out.  Right now
>             I am looking to work with Tri-ISO.
> 
>             Who is interested?  Do I have $200 of interest in Shapelock?
>              Or, how many KG would you like at $10 a KG?  The more
>             interest, the more likely the chance of success.
> 
>             Ripped from http://en.wikipedia.org/wiki/Polycaprolactone :
> 
>                     *PCL also has many applications in the hobbyist
>                     market. Some brand names used in selling it to this
>                     market are Shapelock and Friendly Plastic in the US,
>                     and Polymorph in the UK. It has **physical
>                     properties* <http://wiki/Physical_property>* of a
>                     very tough, nylon-like plastic that melts to a
>                     putty-like consistency at only 60°C. PCL's specific
>                     heat and conductivity are low enough that it isn't
>                     hard to handle at this temperature.This makes it
>                     ideal for small-scale modeling, part fabrication,
>                     repair of plastic objects, and **rapid prototyping*
>                     <http://wiki/Rapid_prototyping>* where heat
>                     resistance isn't needed. Though molten PCL readily
>                     sticks to many other plastics, if the surface is
>                     cooled, the stickiness can be minimized while still
>                     leaving the mass pliable.*
> 
> 
>             -- 
>             Success is a tasty spirit distilled from bitter failure
>             --Coreyfro
> 
> 
> 
> 
>     -- 
>     Success is a tasty spirit distilled from bitter failure
>     --Coreyfro
> 
> 
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