Re: FDM for Vacuum Forming

From: Mike Naylon (m.naylon@qmi.asn.au)
Date: Tue Sep 28 1999 - 02:25:20 EEST


Al,

>From what I've seen FDM models are at times quite porous the reasons could be several
but it's an observed fact that they are. However the porosity is not due to the so
called inherent porosity of ABS. If you think ABS is porous then check it out by
trying to suck air through a 2mm thick sheet !!

Cheers

Mike

Rodrigo Pedron wrote:

> Dear Al,
>
> The porosity in FDM generated ABS parts is not related to gaps in layer to
> layer adhesion since that can be controlled through QuickSlice software.
>
> Its related to the inherent porosity of ABS plastic.
>
> Best regards,
>
> Rodrigo.
>
> Rodrigo Pedron
> IMC Customer Manager
> UNILEVER LATIN AMERICA
> voice 55 11 3741-2063
> fax 55 11 3741-1049
> e-mail rodrigo.pedron@unilever.com
>
> -----Original Message-----
> From: AHastbacka@aol.com [SMTP:AHastbacka@aol.com]
> Sent: Monday, September 27, 1999 9:53 AM
> To: rp-ml@bart.lpt.fi
> Subject: FDM for Vacuum Forming
>
> I am somewhat confused by the comments from several list members who have
> stated that FDM ABS parts are great for vacuum forming because of the
> inherent porosity. I assume the porosity comes about because of gaps in the
> layer to layer adhesion.
>
> If the parts are inherently porous, how can it be that FDM ABS parts have
> nearly the same mechanical properties as injection molded ABS?
>
> Regards,
> Al Hastbacka
>
> For more information about the rp-ml, see http://ltk.hut.fi/rp-ml/
>
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