[PSUBS-MAILIST] Printed Kort Nozzle

[Alan James]

Alec / Joe,
these products "milled glass fibers" or "chopped strand glass fibers"
 may be OK, in combination with epoxy resin.
http://www.fiberglasssupply.com/Product_Catalog/Fillers/fillers.html

The more you can add, the stronger the product, but also it becomes thicker
& harder to pour in to small voids. I would be careful of using polyester resin as it
would probably melt the printed shell.
You may be able to use a thin flexible plastic rod to stuff courser mixtures down in to
the shell.
Alan


________________________________
 From: Alan <alanlindsayjames at yahoo.com>
To: Personal Submersibles General Discussion <personal_submersibles at psubs.org> 
Sent: Saturday, November 9, 2013 8:10 AM
Subject: Re: [PSUBS-MAILIST] Printed Kort Nozzle
 


Alec / Joe,
I will contact a friend who is in the 3d printing business, and try & find out a bit more
about this application & casting materials.
You would need to incorporate risers (tubes) in the design to vent air for the resin 
pouring process, & maybe " keys" on the inside of the mould to give the resin more
grip to the printed shell.
Cheers Alan



Sent from my iPad

On 9/11/2013, at 12:24 AM, Alec Smyth <alecsmyth at gmail.com> wrote:


Hi Alan,
>
>
>I like this idea! I have a printer I built myself so am a little familiar with them. One of the parameters you provide the printers on each job controls the "filling" of the piece. Normally, to save material that is a sort of cross-hatch, and the parameters control things like the direction and density of that cross-hatch. But the problem with that, for an underwater application, is that the resulting piece is full of air voids. I'd always assumed I would print something like this solid. However, if you print it hollow and fill it with structural fiberglass, the end result is going to be a lot stronger than if it's solid plastic. In addition, if we printed by parts but filled it up once those parts are assembled, the resin itself could be the "glue" that holds those parts together.
>
>
>Thanks,
>
>Alec 
>
>
>
>On Thu, Nov 7, 2013 at 10:01 PM, Alan James <alanlindsayjames at yahoo.com> wrote:
>
>Joe,
>>I was re thinking your idea of a printed Kort nozzle.
>>There are printer kits for $900- that would do the job.
>>http://www.3dstuffmaker.com/
>>
>>The ABS printer cable I've seen selling for about $1- an ounce.
>>The $899- version in the above link could possibly be big enough to print
>>the nozzle in one shot. If not then print it in sections & glue together.
>>My idea is to print the nozzle hollow with an egg shell wall thickness & fill it with
>>a fiber reinforced epoxy resin. The resin may need a few pours to allow for contractions
>>in the resin while setting.
>>Maybe under $30- in materials.
>>I am not at the point where I need this & neither are you, but I think this idea still
>>holds a lot of promise.
>>Regards Alan
>>
>>
>>
>>
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>>
>>
>
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