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Re: [HOn3] Plastic to brass

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  • JOHN SPRATLEY
    Hi Tom, Gues the process to turn plastic parts to brass is basically the Lost Wax casting system. However, rather than use mass produced wax masters, the
    Message 1 of 3 , Mar 17, 2013
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      Hi Tom, Gues the process to turn plastic parts to brass is basically the Lost Wax casting system.
      However, rather than use mass produced wax masters, the plastic part is used as a One Off
      Master,  coated in plaster and ceramic, then when the mold is baked, the Plastic melts(hopefully)
      and runs out, leaving a perfect negative. This is then filled with molten Brass, and you have the brass part. Unfortunately the mold has to be baked at a much higher temperature, and there is no gaurentee that the plastic will all run out.  Some firms have cast wax masters in the same dies as the plastic parts,
      but this can be a problem as the wax versions may not be strong enough to use for making the molds.
      Also either method is very expensive. 
        Don`t know any firm that offers this service. Kind Regards, John.therailtoad.

      Sent: Sunday, 17 March 2013, 4:24
      Subject: [HOn3] Plastic to brass

       
      Group,
      Years ago I had written to David Braun of the Backshop about converting plastic to brass.David`s website had photos of a Grandtline Porter built of pastic to brass conversion parts. Would convert to exactly the same size parts.

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