From: Bob Olsen (Bob@protogenic.com)
Date: Wed Apr 09 2003 - 23:01:29 EEST
I'd say the mold would seal fine, because you have to mill the A and B half
shutoffs to fit no matter what the part geometry. Your part may just look
funky. Faceting shouls only affect the part, not the mold shutoffs.
> -----Original Message-----
> From: Rohit Kumar [mailto:rohitk@isrmail.isr.umd.edu]
> Sent: Wednesday, April 09, 2003 1:31 PM
> To: rp-ml@rapid.lpt.fi
> Subject: machining of STL files
>
>
> Hi.
>
> I had a question on machining of STL files.
>
> Since STL files are faceted, if mold is machined, what's the
> guarantee that the core and cavity would seal properly
> (assuming the parting line is not perfectly straight and has
> sort of a contour to it)?
>
> My understanding is that if the resolution of the triangles
> is within that of the milling process, then there is no
> problem. However, if it's not, what happens then? For molds
> made via SLA, the mold material is soft. So applying
> pressure, would sort of deform the material such that at the
> parting plane, the core and cavity make a seal. But say if
> the mold is made out of tool steel, what happens then? BTW,
> is mold ever made out of tool steel via STL files?
>
> Any inputs will be appreciated.
> Best regards,
> Rohit.
>
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