[Noisebridge-discuss] Fwd: New equipment for noisebridge :)

Trent Robbins robbintt at gmail.com
Fri Dec 4 21:12:16 UTC 2015


We would also have to consider power costs.  An injection moulding machine
could probably ring up quite a bill.

I found this 2008 research paper
<http://oaktrust.library.tamu.edu/bitstream/handle/1969.1/87974/ESL-IE-08-05-06.pdf>
detailing
the kWh per kg plastic used for hydraulic, mixed, and all-electric molding
machines.  It comes out to 0.5 to 1 kwh / kg.

Thought experiment:  Injection Mold donor runs 100 kg of product per month
- that's ~220 lbs of plastic per month and a 100 kWh increase in our
electric costs. Estimated cost is $22

Thought experiment 2: Injection Mold donor runs 500 kg of product per month
- that's ~250 lbs of plastic per week, 500 kWh, and $110 estimated cost per
month.

Annualized we have a minimum cost increase of $264-$1320.  Not bad, but we
could probably get them to pay this as well.

This gives us an idea of what it would cost for our use as well.

Please note that I know very little about these things, so anyone with
actual experience please feel free to chip in your hard earned knowledge.


T



On Fri, Dec 4, 2015 at 12:48 PM, Rob M <veryprofessionalguy at gmail.com>
wrote:

> Here's a vid on the process https://www.youtube.com/watch?v=RMjtmsr3CqA
>
> I think an advantage of injection molding are 'smoothness' possibly?
> For instance, at work we have a transparent elevator button, but it's
> chipped and nasty looking now.  I'd yeild to anyone else with actual
> experience, but I thought that using a 3D printer for this transparent
> part would produce suboptimal results with nasty ridges and such.  Is
> that the case?  I'm kind of a fabrication noob trap in the s/w world atm.
>
> Maybe someone else can post out some other advantageous use cases for
> the new equipment.
>
> On 12/04/2015 12:18 PM, Patrick O'Doherty wrote:
> > I have zero details about the machine itself. Maybe someone could reach
> out to
> > Pablo to ask for more specifics?
> >
> > Would this be useful to the community? I feel like 3d printers are much
> closer
> > aligned with our fabrication needs
> >
> > p
> >
> > On Fri, Dec 04, 2015 at 10:40:40AM -0800, John Ellis wrote:
> >> Hi Patrick,
> >>
> >> Do we know what the material and tooling(die) requirements are? A few
> >> details such as the type/model might make things easier clearer.
> >>
> >> If it works out, and get used effectively, it would be great for NB. The
> >> learning curve would be somewhat steep though.
> >> IMHO Encouraging local production is a very good thing, but not so easy
> in
> >> practice.
> >>
> >> Regards,
> >> John
> >> PS. My background is in programming and electronics, not manufacturing
> or
> >> 3D design.
> >>
> >> On Fri, Dec 4, 2015 at 10:14 AM, Patrick O'Doherty <p at trickod.com>
> wrote:
> >>
> >>> This came into secretary@ and could be interesting for the space.
> >>>
> >>> p
> >>>
> >>> ----- Forwarded message from Pablo Criado-P??rez <pablo at droponic.com>
> >>> -----
> >>>
> >>>> Date: Fri, 04 Dec 2015 17:24:29 +0000
> >>>> From: Pablo Criado-P??rez <pablo at droponic.com>
> >>>> To: secretary at noisebridge.net
> >>>> Subject: New equipment for noisebridge :)
> >>>>
> >>>> Hi Noisebridge!
> >>>> First, awesome space! I have a small proposition, we are looking to
> buy
> >>> an injection molding machine
> >>>> but only need to use it a few times a month. So I thought it could be
> >>> great to
> >>>> place it in noisebridge and share it with the community! Now I now
> this
> >>> can sometimes be a large machine, but I think it is definitely
> >>>> worth having. We want to launch this cool product we designed, but
> >>> outsourcing
> >>>> injection molding is just to expensive. And this is a problem many
> people
> >>>> struggle with. So having the machine I think could really help people
> >>> out, and
> >>>> give them the chance to make more
> >>>> Would love to hear what you think,
> >>>> Thanks! Pablo
> >>>>
> >>>>
> >>>>
> >>>> Pablo Criado-P??rez
> >>>> Founder & CEO, Droponic
> >>>> Phone: +1 857-200-3240
> >>>> Email: pablo at droponic.com
> >>>> Website: http://droponic.com
> >>>> Skype: jonycp
> >>>> Address: San Francisco, CA
> >>> ----- End forwarded message -----
> >>> _______________________________________________
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> >>> Noisebridge-discuss at lists.noisebridge.net
> >>> https://www.noisebridge.net/mailman/listinfo/noisebridge-discuss
> >>>
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