Re: [CAD_CAM_EDM_DRO] 3D Printer

"Ian W. Wright" wrote:

>
> This is a fascinating subject - especially as I'm just playing around with
> the Gingery design for an injection moulding machine which is, itself,
> basically a big glue gun for plastic! The biggest problem would seem to be
> the regulation of droplet size but perhaps you could use a kind of cylinder
> and plunger but with some form of solenoid to tap the top of the plunger and
> make it squirt a 'standard sized' drop of wax out of the nozzle.

Exactly, but you know, I've Got it ! You can find "metered dispensers" on E-bay once in a while. You need to use really thick UV cure urethane. The UV cure stuff is one part so the dispenser does not
have to mix for one thing, AND under UV light, the stuff sets up like Pronto ! The metered pump can deliver the little Fly poop size dots you need to build up an object.

This UV cure product is the same stuff you see on these little badges and tags. Lot's of you have them in that little square hole on the front of your PC tower. Smooth, curved..... Ok. here's another
place youve seen it, The "NEON" label of a Dodge Neon. The companies that make those things drop a fixed amount on top of graphics with pick and place type equipment. It flows to the edge and they Nuke
It with UV.

I've done this stuff with two part urethane right on top of vinyl Graphics ( I got one of them cutters too). Takes about 15-20 min to set up though and it is real fussy for humidty and temp. Almost
need a clean room.

But, I think the UV cure stuff is the ticket.

Homebrew Rapid Prototyping here we come.

Chris L