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Injection molding

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  • Malcolm Kent Cleaveland
    Folks, There was a thread on the Nn3 list about do-it-yourself injection molding. Someone has come up with a machine that the average hobbyist could use to
    Message 1 of 9 , Jun 10, 2013
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      Folks,

      There was a thread on the Nn3 list about do-it-yourself injection molding. Someone has come up with a machine that the average hobbyist could use to mold small pieces. Unfortunately, it seemed limited to simple molds and you have to get a mold made.

      Does anyone know sources of molds, especially the more complicated ones used to make things like boxcars?

      CheerZ,
      -- Malcolm Z
      MCZ Models




      [Non-text portions of this message have been removed]
    • etendam
      I ve seen molds created of liquid Aluminium (Resin)used by hobbyist. I think this would be the best way to start with. The proces is similar to creating a
      Message 2 of 9 , Jun 11, 2013
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        I've seen molds created of liquid Aluminium (Resin)used by hobbyist. I think this would be the best way to start with. The proces is similar to creating a double silicone mold. (piece in clay-> por in first -> remove clay -> make second half)

        Ed

        --- In z_scale@yahoogroups.com, Malcolm Kent Cleaveland <mcleavel@...> wrote:
        >
        > Folks,
        >
        > There was a thread on the Nn3 list about do-it-yourself injection molding. Someone has come up with a machine that the average hobbyist could use to mold small pieces. Unfortunately, it seemed limited to simple molds and you have to get a mold made.
        >
        > Does anyone know sources of molds, especially the more complicated ones used to make things like boxcars?
        >
        > CheerZ,
        > -- Malcolm Z
        > MCZ Models
        >
        >
        >
        >
        > [Non-text portions of this message have been removed]
        >
      • Alan Cox
        On Tue, 11 Jun 2013 12:21:13 -0000 ... There are commercial people who basically 3D print low volume moulds. It s cost effective for a few hundred items in
        Message 3 of 9 , Jun 11, 2013
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          On Tue, 11 Jun 2013 12:21:13 -0000
          "etendam" <etendam@...> wrote:

          > I've seen molds created of liquid Aluminium (Resin)used by hobbyist. I think this would be the best way to start with. The proces is similar to creating a double silicone mold. (piece in clay-> por in first -> remove clay -> make second half)

          There are commercial people who basically 3D print low volume moulds.
          It's cost effective for a few hundred items in certain formats.

          We still have a variety of UK toolmakers, dunno what the US situation is
          like. Over here it's mostly the more specialist and complex mouldings
          that you can no longer get produced.

          Alan
        • Ken Armstrong
          A year or so ago N-Scale magazine had a long article on making a molding machine from a pottery wheel. They used silicone molding compound to make the molds
          Message 4 of 9 , Jun 11, 2013
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            A year or so ago N-Scale magazine had a long article on making a molding
            machine from a pottery wheel. They used silicone molding compound to
            make the molds from handmade or copied prototypes. Molded items were
            thin and fairly small but it worked.
            Ken A.
          • etendam
            ... can anyone help me getting the article? Ed
            Message 5 of 9 , Jun 12, 2013
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              --- In z_scale@yahoogroups.com, Ken Armstrong <kenarm322@...> wrote:
              >
              > A year or so ago N-Scale magazine had a long article on making a molding
              > machine from a pottery wheel. >
              can anyone help me getting the article?


              Ed
            • Malcolm Kent Cleaveland
              Folks, On Tue June 11 2013 etendam wrote: I ve seen molds made of liquid Aluminum (Resin)used by hobbyist. Ed, I think I ve seen that, too. My impression is
              Message 6 of 9 , Jun 12, 2013
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                Folks,

                On Tue June 11 2013 etendam wrote: "I've seen molds made of liquid Aluminum (Resin)used by hobbyist."

                Ed,

                I think I've seen that, too. My impression is that even milled aluminum molds have a very limited lifespan, and I am going to want to make thousands of shots. My belief is that is way more than an aluminum resin, and perhaps even more than a milled aluminum mold could do.

                On the other hand, Bowser insisted on making me a chrome steel mold guaranteed for a million clean shots (I think the price mentioned was $15k, at which point I almost fell off my chair). I told them that if they guaranteed I'd live long enough to sell a million, I'd pay the price, because it would be a guarantee of immortality.

                CheerZ,
                -- Malcolm Z
                MCZ Models




                [Non-text portions of this message have been removed]
              • Alan Cox
                ... Boggle. I don t think even the big name vendors are using chrome steel moulds any more. Alan
                Message 7 of 9 , Jun 12, 2013
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                  > On the other hand, Bowser insisted on making me a chrome steel mold guaranteed for a million clean shots (

                  Boggle. I don't think even the big name vendors are using chrome steel
                  moulds any more.

                  Alan
                • BAZ
                  Aluminum can do 1,000 s if the right grain and treated like T3. Aluminum is generally $5K a pair. Add-on details (slides), accessories (roof walks, railings,
                  Message 8 of 9 , Jun 12, 2013
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                    Aluminum can do 1,000's if the right grain and treated like T3. Aluminum is generally $5K a pair. Add-on details (slides), accessories (roof walks, railings, trucks, etch.) and you spend easily another $5K+. Most anywhere in the world now.


                    Jeff

                    Sent 'from the road'

                    On Jun 12, 2013, at 11:02 AM, Malcolm Kent Cleaveland <mcleavel@...> wrote:

                    > Folks,
                    >
                    > On Tue June 11 2013 etendam wrote: "I've seen molds made of liquid Aluminum (Resin)used by hobbyist."
                    >
                    > Ed,
                    >
                    > I think I've seen that, too. My impression is that even milled aluminum molds have a very limited lifespan, and I am going to want to make thousands of shots. My belief is that is way more than an aluminum resin, and perhaps even more than a milled aluminum mold could do.
                    >
                    > On the other hand, Bowser insisted on making me a chrome steel mold guaranteed for a million clean shots (I think the price mentioned was $15k, at which point I almost fell off my chair). I told them that if they guaranteed I'd live long enough to sell a million, I'd pay the price, because it would be a guarantee of immortality.
                    >
                    > CheerZ,
                    > -- Malcolm Z
                    > MCZ Models
                    >
                    > [Non-text portions of this message have been removed]
                    >
                    >


                    [Non-text portions of this message have been removed]
                  • David Mummery
                    Malcolm, Just a thought, if you have the drawings ready to go there are 100s of CNC Mills on the secondary market, lightly used from a very soft market,
                    Message 9 of 9 , Jun 12, 2013
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                      Malcolm,

                      Just a thought, if you have the drawings ready to go there are 100s of CNC Mills on the secondary market, lightly used from a very soft market, everything from bench top to room size.
                      Thinking out loud,
                      Dave

                      Dave Mummery

                      http://27squaresof220ing.blogspot.com/
                      http://tractionmadness.blogspot.com/

                      Sent from my U.S. Cellular BlackBerry® smartphone

                      -----Original Message-----
                      From: etendam <etendam@...>
                      Date: Wed, 12 Jun 2013 11:26:14
                      To: <z_scale@yahoogroups.com>
                      Subject: [Z_Scale] Re: Injection molding

                       





                      --- In z_scale@yahoogroups.com <mailto:z_scale%40yahoogroups.com> , Ken Armstrong <kenarm322@...> wrote:
                      >
                      > A year or so ago N-Scale magazine had a long article on making a molding
                      > machine from a pottery wheel. >
                      can anyone help me getting the article?

                      Ed
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