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  • #31
    Bernd, just a thought...instead of cutting apart the wall into individual stones after casting it,

    would it work as well to use a variety of tools (Dremel, hobby knife, small gouge and chisel to slightly change

    the faces of stones so they don't look like they did originally? Then you'll have walls that don't look like any

    others, but still a solid one piece casting overall?

    Comment

    • #32
      quote:

      Originally posted by Bill Gill

      Bernd, just a thought...instead of cutting apart the wall into individual stones after casting it,

      would it work as well to use a variety of tools (Dremel, hobby knife, small gouge and chisel to slightly change

      the faces of stones so they don't look like they did originally? Then you'll have walls that don't look like any

      others, but still a solid one piece casting overall?

      I didn't state it right as to what I want to accomplish. Here's a picture of the South River Model Works block roundhouse.



      Notice the two bottom rows of blocks. They are quite even in size all along the length of the wall. They also seems to stand a bit proud of the stones above. I also want to attain a more balanced look. If they had ever sold individual stone molds I would have bought those and not have to cut the stones from a solid wall casting. It'll be kind of like I did the walls on the rock-crusher, individual blocks.

      I refer you to the pictures on the first page of the different vinyl rock wall products. I will be making plaster castings of these and cut out the individual stones to assemble into a master mold. A lot of work? Yup, but I'm hoping I'll be able to attain a look I like.
      New York, Vermont & Northern Rwy. - Route of the Black Diamonds

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      • #33
        Ah, gotcha. I see what you're aiming for.

        Comment

        • #34
          Ok, it rained very early this morning and the rest of the day is supposed to have some rain so I called a "rain day" to do some modeling. I couldn't decide which project to work on. I decided to work on the master rock mold.

          When I left off on the last page I showed how I was going to drill the holes in the Acrylic so they match. What I'm going to show is called match drilling, at least that's what they called it back at work.

          First I found what the thickness of the base plate is.



          Taking half of that figure, .100", I scribed a short line on where to drill a #50 (.070" dia.) hole in the side panel.



          Set up my mini-mill with a #50 drill and drilled a hole .100" from the bottom edge.



          Back at the Bridgeport I eye-balled the side plate in from the end and from the back stop. Made sure everything was flush.



          Drilled down the full length of the flutes on the drill.



          Next I used a center in the drill chuck to hold the tap handle square to the hole and proceeded to tap the hole with hand power.



          Open up the #50 hole to a clearance hole for the #2-56 screw and tightened down the side panel.



          This allowed me to hold the piece in place with one screw while drilling the second hole.



          Holding the side piece against the back stop helps keep everything in alignment.



          And the end result. Only three more sides to do.



          I know some are thinking this is more work than it's worth, but hey, it's a master mold right? [^]

          Bernd
          New York, Vermont & Northern Rwy. - Route of the Black Diamonds

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          • #35
            Thanks for the detailed explanation on how you drilled the acrylic. You make it look easy.

            George
            The sky is not my limit, it's my playground.

            Comment

            • #36
              I'll be watching "the machinist" closely.
              Carl

              Comment

              • #37
                Bernd.

                Where is the "Mr Safety Poster" in that spinning drill bit / finger photo? Glad to see your 'auxiliary' work area is neater than mine. Keep up the great work! It's going to be terrific.

                Jim
                Take the red pill

                Comment

                • #38

                  Bernd you may do things to "over kill" but they will last a lifetime. :up:
                  Frank

                  Comment

                  • #39
                    quote:

                    Thanks for the detailed explanation on how you drilled the acrylic. You make it look easy.

                    George


                    Thanks George. It is easy, I just use different tools than everybody is used to using.

                    CarlB said:

                    quote:

                    I'll be watching "the machinist" closely.

                    Careful you don't get a chip in your eye. [^]

                    quote:

                    Bernd.

                    Where is the "Mr Safety Poster" in that spinning drill bit / finger photo? Glad to see your 'auxiliary' work area is neater than mine. Keep up the great work! It's going to be terrific.

                    Jim


                    The Safety Poster is behind the machine where you can't see it. Will detail this project to the "bitter" end. [:-smile_green]

                    quote:

                    Bernd you may do things to "over kill" but they will last a lifetime.


                    Frank


                    Thanks Frank. problem is I need several "lifetimes" to get all my projects done.

                    Ok, final picture of the mold box and wall portion. I haven't decided if I wan to screw the wall down or use silicone sealant. The sealant doesn't stick to the acrylic to good.



                    I have a second mold box to make. I'll wind up with two of these walls. Then I have several more to make for the other wall sections I want to try and make plaster walls from. In total that'll be 7 more mold boxes. Once the mold boxes are all done I'll order the silicone rubber to pour the molds.

                    Bernd
                    New York, Vermont & Northern Rwy. - Route of the Black Diamonds

                    Comment

                    • #40
                      Well, after having gone the political rabbit hole for the last couple of months I've decided to come out of the hole and start some modeling. Adding to the three 1:1 projects that I posted about in the Crew Lounge, plus not having any modeling interest added to the modeling lull. But with the weather turning colder outside the urge to get back into modeling is starting to take hold again.

                      So to start off the modeling season I finished up the first two mold boxes. The sides have been sealed with silicone sealant and the walls have been glued down with same. Hopefully they'll hold.



                      I have four more mold boxes to make before I pour the rubber molds.

                      I'm also going to gather the other threads I started on the roundhouse and the block wall of the rock-crusher building. That way it'll be easier to follow and I won't get lost as to where I posted a specific build.

                      HOn30 quarry line started here. https://railroad-line.com/node/31167 NOTE: Link updated to new forum standard

                      The experiment of making a block wall started here: https://railroad-line.com/node/39523 NOTE: Link updated to new forum standard
                      Last edited by Bernd; 10-03-2021, 06:15 PM.
                      New York, Vermont & Northern Rwy. - Route of the Black Diamonds

                      Comment

                      • #41
                        After posting that last post I started on the second set of walls. These are the vinyl walls from Chooch Enterprises.





                        I was going to use 1/4" thick acrylic to mount the wall to but didn't have any left, so I decided to use gator board. Cut up a couple of pieces.

                        Now I'm in a quandary, do I make a mold box for these like I did for the first walls or just cut up some gator board and glue the pieces together? Before I decide what to do I need to get some spray adhesive to glue down the vinyl walls to the gator board.

                        More later.

                        Bernd
                        New York, Vermont & Northern Rwy. - Route of the Black Diamonds

                        Comment

                        • #42
                          Well, I decided to go all out and use gator board for the mold boxes. The acrylic was to much work and why do I need such a complex mold box for the few times it'll get used to make a mold.

                          So I used my table saw to cut up pieces for four more mold boxes.



                          The side walls are pinned together with straight pins and white carpenters glue. The pins help keep the everything in alignment.



                          I glued the vinyl wall backed with gatorboard into the mold boxes.



                          I've got two more vinyl walls to mount to gatorboard and then it'll be time to order the rubber mold compound.

                          Bernd
                          New York, Vermont & Northern Rwy. - Route of the Black Diamonds

                          Comment

                          • #43
                            I'm also working on getting the upper part of the rock crusher building parts together to try and move that project along.

                            I'd like to thank Carl B for putting me on to "chipboard". His thread on building the Dickens Victorian London Build convinced me to try chipboard for building the upper half of the rock crusher building. I order a box of 40 11" X 14" X .050" thick board to mount the North West Lumber board & batten siding to. Further his thread on "Chesapeake & Ohio Combination Office & Depot Build" build put me over the edge to use the chipboard. I also gleaned some good info from George on his "Cricut Cut Boxcar" where he used 3M 345 adhesive tape to assemble the car sides. Going to try this construction method as soon a I order some of the adhesive tape.

                            I have the chipboard. Got that from Blick Art Supplies.



                            So it looks like I'm off on some model building finally. I do have 99.5% of my 1:1 outside projects completed and the weather will be turning cooler in the next week. So it's a good time to get back into modeling and getting away from the crazy world we have at the moment.

                            Until next time.

                            Bernd
                            New York, Vermont & Northern Rwy. - Route of the Black Diamonds

                            Comment

                            • #44
                              I'm looking forward to seeing the castings that come out of those mold boxes, Bernd.
                              Bruce

                              Comment

                              • #45
                                Thanks for the "shout-out" Bernd. You're on our way to modeling bliss now!

                                I'm sure I got the chipboard technique from another modeler, but I can't remember who! [:-hypnotized]
                                Carl

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