From: Rhys Morgan (r.morgan@liverpool.ac.uk)
Date: Wed May 28 2003 - 16:24:05 EEST
Brian, Neil and list,
Did you ever try sintering at room temp and using a substrate to sinter
onto?
It's the standard practice for overcoming curl/stresses with high temp metal
build.
Rhys
----- Original Message -----
From: "Brian Caulfield" <brian.caulfield@nuigalway.ie>
To: "Rapid Mailing List" <rp-ml@rapid.lpt.fi>; "Neil Hopkinson"
<N.Hopkinson@lboro.ac.uk>
Sent: Wednesday, May 28, 2003 1:34 PM
Subject: Re: laser sintering of PEEK
> Neil,
> I have attempted to do this and I think Kwang Hui in Singapore tried
> aswell. The inital results were not promising. I used a 2500 plus
> Sinterstation. The problem as you said is the melt temp of the PEEK. I
> heated the powder up initally and the powder did melt on the pass of the
> laser but with the massive tempersture gradient between the melted PEEK
and
> hte surrounding unsintered PEEK it caused the layer to curl dramatically.
> When the roller passed over again the solid laer would be moved by the
> roller.
> I was also having difficulties with the powder sticking and clumping
to
> the roller which resulted in an uneven powder layer.
>
> Brian
>
>
> ----- Original Message -----
> From: "Neil Hopkinson" <N.Hopkinson@lboro.ac.uk>
> To: <rp-ml@rapid.lpt.fi>
> Sent: Wednesday, May 28, 2003 12:21 PM
> Subject: laser sintering of PEEK
>
>
> > Has anyone tried laser sintering of PEEK (melt temp~400 deg C)? Is it
> > possible on a standard DTM/3D machine using higher laser powder and
build
> > chamber temperature?
> >
> > Neil
> >
> > Neil Hopkinson BEng(Hons) PhD CEng MIEE
> > Lecturer
> > Wolfson School of Mechanical and Manufacturing Engineering
> > Loughborough University
> > LE11 3TU
> > UK
> >
> > Tel: 01509 227529
> > Fax: 01509 227549
> >
>
http://www.lboro.ac.uk/departments/mm/research/rapid-manufacturing/index.htm
> > l
> >
> >
> >
> >
> >
>
>
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