handheld additive manufacture as art

[Ed Bisdee]

http://www.core77.com/posts/33215/Guns-Plastic-and-Baroque-Furniture

handheld plastic extruder gun used to make baroque style furniture from HDPE.

I like the concept, although i'm not too keen on the finished product. What do people think?

[Cay Green]

The 'baroque' bit is post-hock rationalisation. It's like something that Homer Simpson would have thought up in the Simpsons *design* episode. Which is probably why I like it so much - it's a 12 bore plastic doodler pen!

Additive manufacture for *big* things (not Yoda heads) is something I've been banging on about to anybody who'll listen for ages. I'm currently ordering the parts for 2 desktop plastic grinder/shredders - One for down here, and one for the Maker-Space. 

Next up will getting the extruder working. After than, I want to build a test bed to test extruder designs that can extrude 1.75mm or 3mm plastic filament at that diameter - not small 0.4mm etc. 

This bed will involve a simple rotating plate (to simulate X and Y axis movement of a printing bed - at different speeds - mm/s) onto which plastic can be extrude at different layer heights. The extruder will have movement only in the Y axis. This test bed  will test the viability to making useful stuff from recycled plastics. One it's been proved that structural sound objects can be made (no coloured *baroque* splats) that a large format 3d printer can be made that uses the extruder perfected on the test bed. Circular economy one step closer…

c

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[Jon Davies]

Nice idea, but I agree with Ed on the finished product. It looks quite ugly to me, and would go for some other concept.

Fair play to the artist though!  Looks like the start of awesome plastic-recycling art with a geet huge 3doodler.

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[Jon Davies]

Hey Cay, all sounds awesome. Very kind of you to donate a desktop plastics grinder. Also interested in seeing how your large format project progresses.

[Ed Bisdee]

a large bore filament 3d printer is a good idea. i'm suprised it hasn't been tried before.

[David Pye]

Would you not need larger diameter filament to sensibly extrude a 3mm bead?  If the nozzle diameter is the same size as filament in,  would it work?

David

[Iain Yarnall]

I like the look of the gun more than the furniture!  Looks like a really good hack!

I'd really like to see a combination of filling with a large head and doing the detail with a normal head.  You'd have to have 2 lots of slicing going on though to do the outer wall up to the height of a single fill layer and then do a fill layer.  I'd like to think it would be less prone to de-lamination but it might end up making it more prone to de-laminating between fill layers.  It would certainly be interesting to find out.

Cheers,

Iain.

[Glen Beestone]

thinking the size of the extrude needn't be limited to the filament size as long as you have a big enough melt chamber and some way to stop the melt backing up around the filament going in.

G

[David Pye]

Your filament feed rate would also have to be faster than your extrude rate,  the opposite of what we do at the moment.

You'd presumably need to have a dogleg or similar in the extruder otherwise your filament might find its way through the extruder and out the nozzle without touching the side and melting!

David

[Glen Beestone]

 or you use something like this which relies on a chemical reacion rather than a melt extrusion

 ( i guess it depends of wheter you are concentrating on the recycling aspect of it )

 

 

http://www.thisiscolossal.com/2013/05/anti-gravity-object-modeling-mataerial-is-a-robot-that-draws-sculptures-in-3d/

 

G

 

 

Sent: Wednesday, March 25, 2015 at 4:25 PM
From: "David Pye" <davi...@gmail.com>
To: north-ea...@googlegroups.com
Subject: Re: [Makers] handheld additive manufacture as art

[David Pye]

How about expanding foam 3dprinting?

:-D

[Glen Beestone]

I was thinking about something like that. You need something to get it to "go off" as fast as possible after exiting the nozzle

You could potentially build really big stuff

[Jon Davies]

>You could potentially build really big stuff

You mean like this?
http://www.bbc.co.uk/news/blogs-news-from-elsewhere-27156775

On Wed, 25 Mar 2015 17:12 Glen Beestone <gl...@technologist.com> wrote:

I was thinking about something like that. You need something to get it to "go off" as fast as possible after exiting the nozzle

You could potentially build really big stuff

On 25 Mar 2015 16:36, David Pye <davi...@gmail.com> wrote:

How about expanding foam 3dprinting?

:-D

On 25 Mar 2015 16:31, "Glen Beestone" <gl...@technologist.com> wrote:

 or you use something like this which relies on a chemical reacion rather than a melt extrusion

 ( i guess it depends of wheter you are concentrating on the recycling aspect of it )

 

 

http://www.thisiscolossal.com/2013/05/anti-gravity-object-modeling-mataerial-is-a-robot-that-draws-sculptures-in-3d/

 

G

 

Sent: Wednesday, March 25, 2015 at 4:25 PM
From: "David Pye" <davi...@gmail.com>

To: north-east-makers@googlegroups.com

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[Colin Jones]

Feed rate is about the same as extrude rate. The problem is heating the material. If you need 20W for a 0.35mm nozzle, you'll need about 1500W for 3mm (74 times the flow rate).