rbrown7713 Posted January 14, 2018 Author Share Posted January 14, 2018 Here is the next challenge and I say challenge because this is not as easy as the roofs. As you can see, there are protrusions and those have to be made level or below the top of the mold, otherwise, I would have to fill the top mold and quickly place it on the lower mold and what would probably happen is the plastic would run out before I got the top mold in place, so, the whole part has to be below the top of the lower mold, so I will have to do some figuring on this one. Bob. Quote Link to comment Share on other sites More sharing options...
enginear joe Posted January 14, 2018 Share Posted January 14, 2018 could you use those as fill holes or squeeze out holes if the mold is a squeeze mold? If a fill mold you could then cut them to size after the pour? I maybe way off as how you are planning this one? I picture the side laying face down with these protruding upwards. Quote Link to comment Share on other sites More sharing options...
rbrown7713 Posted January 14, 2018 Author Share Posted January 14, 2018 What you say is true, but the way I try to make my molds is to produce a part that requires no additions or post trimming. I don't always achieve that, but I think that I can with these, we shall see. OK, I was just looking at the picture above and just realized how I am going to do it, sometimes it takes me a while. Bob. Quote Link to comment Share on other sites More sharing options...
rbrown7713 Posted January 14, 2018 Author Share Posted January 14, 2018 Here is the Superliner roof mold ready for the pouring of the second part of the mold. Bob. Quote Link to comment Share on other sites More sharing options...
rbrown7713 Posted January 15, 2018 Author Share Posted January 15, 2018 This is what I came up with and I think this will work just fine. Bob. Quote Link to comment Share on other sites More sharing options...
rbrown7713 Posted January 17, 2018 Author Share Posted January 17, 2018 Here is the layout for the Amfleet frame mold. Bob. Quote Link to comment Share on other sites More sharing options...
Sean Posted January 17, 2018 Share Posted January 17, 2018 Quote Link to comment Share on other sites More sharing options...
rbrown7713 Posted January 17, 2018 Author Share Posted January 17, 2018 Yep, 7 hours a day, 7 days a week, but I love it. Bob. Quote Link to comment Share on other sites More sharing options...
rbrown7713 Posted January 18, 2018 Author Share Posted January 18, 2018 Well, here I am again, waiting on a shipment of urethane. Here are some pictures of the last of the large molds side and frame of the Amfleet, and next I will post some pics. of the small parts for the Superliner. Bob. Quote Link to comment Share on other sites More sharing options...
Sean Posted January 19, 2018 Share Posted January 19, 2018 Bob I might of missed the answer to this question : what are you planning to use as a medium/ product for the car , resin, alum... Quote Link to comment Share on other sites More sharing options...
rbrown7713 Posted January 19, 2018 Author Share Posted January 19, 2018 For the Superliner, I am using styrene sheets for the sides, and for the ends and the roof, I will be using poured urethane plastic, just like the original, and as for the Amfleet cars, I will use poured urethane plastic for the sides, roof. frame and ends. Once I get the sides of the Superliner arranged, I might try to pour them too. Bob. Quote Link to comment Share on other sites More sharing options...
Sean Posted January 19, 2018 Share Posted January 19, 2018 I thought you would try aluninuuummmm for the frame .. Quote Link to comment Share on other sites More sharing options...
rbrown7713 Posted January 19, 2018 Author Share Posted January 19, 2018 No, I don't mix mediums, plastic will be fine and strong enough throughout and also much easier to work with. Great trains glued the frame, sides, and ends, of the Superliners, but I am going to screw them together, because I will need access to the inside for the diaphragms, lights, and because I might install interiors in them later. The Amfleet cars are all screwed together and I am maintaining that method. Ralph Brown made dies to stamp the detail doors and vents out of thin aluminum as you can see here, and since I don't have the dies, I will cast them out of urethane plastic, I hope as, they are awful thin. Bob. Quote Link to comment Share on other sites More sharing options...
rbrown7713 Posted January 19, 2018 Author Share Posted January 19, 2018 I finally got my 3d printed trucks back from the shop and here are some pictures of them raw, no sanding or filling yet. While these parts, overall are accurate, there are some rough spots on them and will be worked out before I make molds of them. These parts were printed on an FDM, fused deposition modeling, type printer that can be purchased with a cost from between, 6,000.00, to 8,600.00 dollars and the same shop is producing some of my window frames on this same type machine and will be receiving them soon, so we will see how they come out. This shop also has a resin type 3d printer that prints in a much smaller resolution for twice the price. Bob. Quote Link to comment Share on other sites More sharing options...
Sean Posted January 19, 2018 Share Posted January 19, 2018 It looks like they used a scroll saw to cut them ... ruff ... Quote Link to comment Share on other sites More sharing options...
rbrown7713 Posted January 19, 2018 Author Share Posted January 19, 2018 Yes, to print a part with smooth surfaces, the resin type printer, SLA is one of the best, but the prices of commercial ones start at 7,000 and go up to 200, 000, and produce parts that one has to try hard to see any layering, but these parts are fine for what I am going to do with them, and that is to make urethane molds after smoothing them out, a little body work and they will be OK. Bob. Quote Link to comment Share on other sites More sharing options...
rbrown7713 Posted January 20, 2018 Author Share Posted January 20, 2018 Here is the layup for the first part of the mold for the trucks and boy, it took me a while to figure this one out. Bob. Quote Link to comment Share on other sites More sharing options...
rbrown7713 Posted January 21, 2018 Author Share Posted January 21, 2018 OK, now almost ready to pour the first part of the mold for the trucks. Should come out good. Bob. Quote Link to comment Share on other sites More sharing options...
rbrown7713 Posted January 21, 2018 Author Share Posted January 21, 2018 I forgot that I made this scene for an airplane that I mounted it in, and note that the coyote has one hand on the stick and the other is holding a fork. Don't know what happened after the crash. Bob. Quote Link to comment Share on other sites More sharing options...
rbrown7713 Posted January 22, 2018 Author Share Posted January 22, 2018 I don't like the Great trains attempt to make an AC vent for the Superliner, so I am reviving the same jig that I used for the window shades for the Pullman passenger cars, might work, or not. Bob. Quote Link to comment Share on other sites More sharing options...
rbrown7713 Posted January 23, 2018 Author Share Posted January 23, 2018 On 1/19/2018 at 8:19 AM, Sean said: I thought you would try aluninuuummmm for the frame .. To add the reasons as to why not aluminum, for one, I am lazy, look at the frame ready for the second pour and you can see that all of the mounting holes are already there for the sides, undercarriage and holes for the ends, why re-invent the wheel. Also, as far as strength, by the time that I attach the sides, it is like making a box, very strong. Quote Link to comment Share on other sites More sharing options...
Jerry B44 Posted January 24, 2018 Share Posted January 24, 2018 Looking good! Quote Link to comment Share on other sites More sharing options...
rbrown7713 Posted January 24, 2018 Author Share Posted January 24, 2018 Thanks Jerry, a little encouragement is always nice. Here is almost the last item, end for the Amfleet car pattern for a mold. Next, the air vent for the Superliner, I hope, Bob. Quote Link to comment Share on other sites More sharing options...
rbrown7713 Posted January 24, 2018 Author Share Posted January 24, 2018 Amfleet side ready for the first pour. Bob. Quote Link to comment Share on other sites More sharing options...
rbrown7713 Posted January 25, 2018 Author Share Posted January 25, 2018 Here are the truck patterns ready for the second part of the mold. Bob. Quote Link to comment Share on other sites More sharing options...
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