Fw: [rp-ml] SLA x SLS

From: Mert Wehl (m.vries@wehl-partner.com)
Date: Sat May 14 2005 - 18:09:37 EEST

I agree with that, only my personal opinion on the expensiveness
of SLA, would be a reflection on the cost of several parts of
the machine in itself.
Likely the most expensive part of the machine is the laser system
itself, which in another perspective decides greatly on the speed
and accuracy of the whole process.
Where the laser itself is no problem at all to change for another
more cost effective one, the finishing of the parts will be there
and is a labor intensive and as such expensive job.
Wether SLS or SLA the layers will always be there inherent
to the process, where SLA parts can nicely be polished and
SLS have more problems in achiving this.

My personal opinion on the item is that the SLA process is far more
accurate than SLS and can still be much more as is today typically.
Resins will continue to evolve and already available resins give a
wide range of aplications.

With regards,

Lammertus de Vries

----- Original Message -----
From: "Brock Hinzmann" <bhinzmann@sric-bi.com>
To: "Miller, Michael W" <michael.w.miller@boeing.com>;
<jharrison@3dresins.com>; "Ricardo Calumby" <ricalumby@yahoo.com.br>;
Sent: Friday, May 13, 2005 9:51 PM
Subject: Re: [rp-ml] SLA x SLS

>I doubt that anyone has the resources to invest in all the process and
>material technologies simultaneously that would be necessary to get one
>approach to out-compete the other. Just as it has taken a long time for
>metal processing and alloying to evolve, I expect to see RM take an
>evolutionary path, as each vendor makes incremental improvements in
>processes and additions to their materials options.
> I have had laser scientists tell me it makes less sense to use a laser as
> a heat source (SLS) than as a source of a chemical change (photo-initiated
> SLA), so I would think that SLA offers greater options, but in the real
> world, business models evolve based on what a given customer is willing to
> pay for, not what a scientist says should be.
> Also waiting in the wings could be discoveries in nanomaterial science and
> self-assembling materials that could tilt in favor of either appproach,
> responding to light or heat or maybe even to some new approach using
> magnetics or ultrasound or some new hybrid approach. As Jim wrote, nothing
> will stay the same.
> Brock Hinzmann
> Technology Navigator
> SRI Consulting Business Intelligence
> On Fri, 13 May 2005 11:11:49 -0700
> "Miller, Michael W" <michael.w.miller@boeing.com> wrote:
>>I agree with Jim, the SL materials will get there. But I don't think the
>>SLA process will penetrate production very far. It's too expensive and
>>labor intensive. I think machines more like 3D's Invision and hybrids are
>>the ticket to manufacturing.
>> I have to add that this is my personal opinion, not necessarily that of
>> my employer.
>>Michael W Miller (michael.w.miller@boeing.com) desk) 206-655-3289 pgr)
>>206-416-0257 fax) 655-0025 The Boeing Company Seattle M/C 45-17
>>66-ZB-XS29 Rapid Product Manufacturing 655-4366 or 655-2262
>>http://dmp-rpm.web.boeing.com/splash.htm Disclaimer: Engineer and out
>>the other!
>> -----Original Message-----
>> From: James P. Harrison [mailto:jharrison@3dresins.com] Sent: Wednesday,
>> May 11, 2005 12:08 PM
>> To: 'Ricardo Calumby'; rp-ml@rapid.lpt.fi
>> Subject: RE: [rp-ml] SLA x SLS
>> Hi Ricardo,
>> Yes! Our SL resins are currently in use as end products. Also, look at
>> the new materials that have come out in the past 4 years, including the
>> one you mentioned. What a difference! The industry went from several
>> General Purpose brittle resins to a wide range of SL materials with
>> unique and different mechanical properties. At this years SLA/SLS User's
>> conference, more SL resins were introduced than ever before. Just wait
>> and see what is developed in the next 4 years. But the SLS technology is
>> also advancing in accuracy and materials. Nothing stays the same!
>> Best Regards,
>> Jim
>> James P. Harrison 3Dimensional Resins 2991 N. Powerline Rd Pompano Beach,
>> FL. 33069 Phone: 954-582-0582 Fax: 954-861-1088 E-mail:
>> jharrison@3dresins.com www.3dresins.com -----Original Message-----
>> From: owner-rp-ml@rapid.lpt.fi [mailto:owner-rp-ml@rapid.lpt.fi] On
>> Behalf Of Ricardo Calumby
>> Sent: Wednesday, May 11, 2005 12:53 PM
>> To: rp-ml@rapid.lpt.fi
>> Subject: [rp-ml] SLA x SLS
>> Dear all,
>> Considering the new materials developed for the SLA process, like DSM
>> Somos NanoForm 15120, could SLA compete with the SLS process, regarding
>> direct manufacturing of plastic parts?
>> It is well-known that SLA is the best rapid prototyping process regarding
>> its accuracy. But, the main limitation was always the material
>> mechanical properties and dimensional stability. So, could someday, SLA
>> be used to manufacture end parts?
>> Ricardo Bou Reslan Calumby
>> Material and Process Development Engineer
>> Embraer - São José dos Campos - Brazil
>> ________________________________
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