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pattern making

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  • integerspin
    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
    Message 1 of 6 , Oct 1, 2003
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      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
    • cvedrick
      Velspar, polyurethane based gloss spar varnish makes a nice, shiny and smooth and very durable finish. It can be sanded, steel wooled or rubbed lightly
      Message 2 of 6 , Oct 1, 2003
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        Velspar, polyurethane based "gloss spar varnish" makes a nice, shiny
        and smooth and very durable finish. It can be sanded, steel wooled
        or rubbed lightly with paint thinner for a glass smooth finish, but
        that is not usually necessary.


        --- 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
      • Carole and Brian Le Page
        Bodge it and Quick , I must remember that! You could try Brewers. They are a paint specialist and may be able to help you. B Brian Le Page Church Crookham
        Message 3 of 6 , Oct 1, 2003
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          'Bodge it and Quick', I must remember that! You could try Brewers.
          They are a paint specialist and may be able to help you.

          B

          Brian Le Page
          Church Crookham
          Hampshire
          England


          > -----Original Message-----
          > From: integerspin [mailto:richard@...]
          > Sent: 01 October 2003 19:03
          > To: hobbicast@yahoogroups.com
          > Subject: [hobbicast] pattern making
          >
          > 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
          >
        • emovi@mweb.co.za
          Hello Richard I occasionally repair sailplanes and sailing dinghies and when I finally getting to the stage of respraying them I: i) give them an undercoat of
          Message 4 of 6 , Oct 1, 2003
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            Hello Richard

            I occasionally repair sailplanes and sailing dinghies and when I finally
            getting to the stage of respraying them I:

            i) give them an undercoat of two-pack zinc chromate primer - this is epoxy
            based that fills and sands (wet or dry) like a dream.
            ii) top coat is a two-pack polyurethane or two-pack polyacrathane - colour
            white.

            Of all the colours white is the hardest and longest lasting.

            Don't skip the undercoat - if you do - you'll treble your sanding time.

            Best sources would be a yacht chandler or maybe an auto body shop.

            cheers edi




            ----- Original Message -----
            From: "Carole and Brian Le Page" <brian.lepage@...>
            To: <hobbicast@yahoogroups.com>
            Sent: Wednesday, October 01, 2003 9:57 PM
            Subject: RE: [hobbicast] pattern making

            >> -----Original Message-----
            > From: integerspin [mailto:richard@...]
            > Sent: 01 October 2003 19:03
            > To: hobbicast@yahoogroups.com
            > Subject: [hobbicast] pattern making
            >
            > 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,
            > i cant spend a tenner a can on a few types of paint in the hope it is
            ok...
            >
            > any ideas..
            > --
            > thanks richard
          • nh_farmer
            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.
            Message 5 of 6 , Oct 4, 2003
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              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
            • Brian Crocker
              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
              Message 6 of 6 , 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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