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28771Re: [hobbicast] Re: pattern making

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  • Brian Crocker
    Oct 5, 2003
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      Hallo all,

      15 years ago when I made patterns as a Tech Officer assisting a Lecturer in
      The subject of Patternmaking and Foundry Practice I used a timber called
      Jelutong it is soft with little or no grain and sands up to a nice finish.
      It was then finished with a "Patternmaking Paint" which was very hard.

      Kind regards,
      Brian and Rena in South Oz.

      ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~

      ----- Original Message -----
      From: "nh_farmer" <nh_farmer@...>
      To: <hobbicast@yahoogroups.com>
      Sent: Sunday, October 05, 2003 7:26 AM
      Subject: [hobbicast] Re: pattern making


      > The only foundry I saw finish the wood patterns used a varnish like
      > polyurethane. They used mahogony for the wood pattern and sanded it
      > to a smooth finish. Generally they used the wood pattern unfinished
      > to make up the production patterns out of metal.
      >
      > JP
      >
      >
      > --- In hobbicast@yahoogroups.com, integerspin <richard@i...> wrote:
      > > hi
      > > I subscribed to this group for a while about six months ago.
      > > I didn't in fact do the castings I needed my self, I had a small
      > > foundry do them.
      > > I made an mdf pattern and have had about 20 of these items done so
      > far..
      > > I am just altering the pattern prior to haveing another ten cast.
      > > Becuse i made the pattern without any undercut's I have to machine
      > rather
      > > a lot off the casting, so I am removing what I can from the
      > pattern,
      > > quicker to remove it onces than ten times?
      > > I wondered what people paint patterns with, I was talking to
      > someone at a
      > > landrover show and he said they use a 2pack floor paint on their
      > patterns,
      > > brushed on it flows out like glass and is quite hard.. I didn't ask
      > what
      > > paint or where I get it though..
      > > I did look in 'Bodge it and Quick' they have a few types of paint
      > that
      > > sound promising, but i cant spend a tenner a can on a few types of
      > paint in
      > > the
      > > hope it is ok...
      > >
      > > any ideas..
      > >
      > > --
      > > thanks richard
      >
      >
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