Al and RPML:
Basically, the extruded material is laid out in "roads" at a certain angle
(changes on alternate layers) in the interior portion of a layer. You can
vary the "air gap" between these roads from .050" or more to an overlap of
.005". Even if you tried to make the part solid, generally it is not
fluid-tight without sealing. Also, the larger the gap, the faster the part.
I would agree that the parts are not the same mechanically as injection
molded ABS, especially for small features in the slicing direction. I would
say, though, that the larger the part, the closer the material comes to
injection molded properties.
Russ Jensen
Parker Hannifin Corp., Racor Div.
AHastbacka@aol.com@bart.lpt.fi on 09/27/99 05:53:08 AM
Sent by: owner-rp-ml@bart.lpt.fi
To: rp-ml@bart.lpt.fi
cc:
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/
For more information about the rp-ml, see http://ltk.hut.fi/rp-ml/
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