Marshall
It is entirely possible to both plasma and arc spray unlimited thickness' of
tool steel direct onto SLA. Ref. my e-mail yesterday the trick is not to
overheat the part, to get the material to adhere to the part, and control
the residual stress levels upon cooling of the metal. Using techniques
developed here at Pera I have manually sprayed (no secondary systems or
simultaneous shot peening) tools which are up to 16 mm thick (I stopped
because I, the robot, was bored). To give you an example of these tools
performance one tool with a shell only 2.5 mm thick and backed with resin
has produced over 3000 glass filled ABS parts with no wear at all. Another
tool was heat treated at 800 deg C and air quenched only moved 0.1 of a mm
throughout (which we think is actually a layer of oxide rather than
distortion). Typical manufacturing times are about twice those of working
with zinc but the performance as you can see blows other low melting point
spraying materials away.
Ben
Ben (Halford)
Consultant
PERA Technology
England
0044 (0)1664 501501 ext. 516
ben.halford@pera.com
www.pera.com
> -----Original Message-----
> From: Marshall Burns [SMTP:Marshall@Ennex.com]
> Sent: 23 November 1999 14:20
> To: Dr Matt Murphy; rp-ml@bart.lpt.fi
> Subject: Spray steel?
>
> Matt,
>
> In answer to Erkut's question about footwear, you said:
>
>
> >Yes - I have used SLA + spray metal (steel) tooling to produce a
> compression
> >mould for processing thermoplastic elastomer boot soles.
>
> The answers I have received to my question about spray metal tooling
> seem to indicate that steel cannot be sprayed onto plastic. Do you know
> something they don't?
>
> Best regards,
> Marshall Burns
> President, Ennex Corporation
>
> Marshall@Ennex.com
> Los Angeles, USA, (310) 824-8700
> www.Ennex.com
>
>
>
> 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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