Petri Sallinen Posted February 20, 2015 Share Posted February 20, 2015 We are going to produce new locomotive kit of the Finnish prototype in H0 scale by using high quality 3D prints as master parts for resin casting. Hulls and bogie sides will made by using the resin casting and the fuel tank and smaller parts will made in white metal. There will be also many parts made in etched nickel silver. My point of view is that high quality 3D prints work excellent as master parts. Yes, they are also quite expensive — too expensive for making only one model, but suitable for using as masters in small series kits. I hope that someone might get ideas of our project. Petri Sallinen Helsinki, Finland Link to post Share on other sites More sharing options...
bluemattersoda Posted February 20, 2015 Share Posted February 20, 2015 Excellent work on the print. Where did you get such a high resolution 3d print done? And is that your own designed chassis? Link to post Share on other sites More sharing options...
Kelly Posted February 21, 2015 Share Posted February 21, 2015 Looks really nice Link to post Share on other sites More sharing options...
Petri Sallinen Posted February 21, 2015 Author Share Posted February 21, 2015 Excellent work on the print. Where did you get such a high resolution 3d print done? And is that your own designed chassis? Prints were made by ProtoLabs (ex-Fineline Prototyping) using SL-system (=Micro Fine Green). http://www.protolabs.com/fineline The chassis is designed by Store Holmborg from Stockholm Sweden. He is the specialist for making chassis for small series kits using the CNC machine. Gearboxes are made in Delrin by milling — the chassis plate is 1 mm brass. It is very easy to work with Sture — we are able to send our 3D design to him and after that he is able to design the chassis using your drawing. Stures chassis are always ready-to-run. We have made earlier some locomotive kits using the same idea. Here is one sample. Link to post Share on other sites More sharing options...
alanbuttler Posted February 21, 2015 Share Posted February 21, 2015 The quality of those 3D prints is amazing! Fantastic work Link to post Share on other sites More sharing options...
thegavs Posted February 21, 2015 Share Posted February 21, 2015 Would be intrested in how you do the casting. I have some 3rd prints that I will be using as masters when I get some time to play Link to post Share on other sites More sharing options...
Hawk Posted March 5, 2015 Share Posted March 5, 2015 We have made earlier some locomotive kits using the same idea. Here is one sample. Thats a really nice model! Did you have to do any cleanup on the printed master? Any sanding of ridges/stepping fromthe layers? And could you tell us a little more on the cost of the printed parts? Link to post Share on other sites More sharing options...
Petri Sallinen Posted March 5, 2015 Author Share Posted March 5, 2015 Any cleanups, sanding etc. is not needed. There are also some smaller parts in our locomotive project, but I did not take photos of them — the price for all parts we needed was 1100 euros. Link to post Share on other sites More sharing options...
Horsetan Posted March 5, 2015 Share Posted March 5, 2015 ....the price for all parts we needed was 1100 euros. At which point, a lot of people start having second thoughts. Link to post Share on other sites More sharing options...
RMweb Gold Corbs Posted March 5, 2015 RMweb Gold Share Posted March 5, 2015 The finish of your locos looks amazing! Any cleanups, sanding etc. is not needed. There are also some smaller parts in our locomotive project, but I did not take photos of them — the price for all parts we needed was 1100 euros. Could I clarify what you mean by this? Do you mean that the price for all the parts you need to build 1 loco was €1100? Or, do you mean that the price to set up production for many locos was €1100? Link to post Share on other sites More sharing options...
Hawk Posted March 5, 2015 Share Posted March 5, 2015 Any cleanups, sanding etc. is not needed. There are also some smaller parts in our locomotive project, but I did not take photos of them — the price for all parts we needed was 1100 euros. Thanks for the reply! Does the RTV for the resin mould degrade or destroy the 3D-printed masters in any way, or can you make several RTV moulds from the same master? Link to post Share on other sites More sharing options...
Petri Sallinen Posted March 6, 2015 Author Share Posted March 6, 2015 The finish of your locos looks amazing! Could I clarify what you mean by this? Do you mean that the price for all the parts you need to build 1 loco was €1100? Or, do you mean that the price to set up production for many locos was €1100? This is the price for parts of one locomotive, but we are using parts as master parts in resin casting — same idea when using CNC machine for making masters. This is too expensive technique for making only one model — we are making 100 kits when the cost of master printing will divide between the whole run. Link to post Share on other sites More sharing options...
Petri Sallinen Posted March 6, 2015 Author Share Posted March 6, 2015 Thanks for the reply! Does the RTV for the resin mould degrade or destroy the 3D-printed masters in any way, or can you make several RTV moulds from the same master? No, the silicon rubber will not destroy the 3D printed masters — but only when you are using "cold cured" (=RTVs) rubbers. Prints are not suitable for using "warm cured" rubbers — like any plastics do not. Link to post Share on other sites More sharing options...
Quarryscapes Posted March 11, 2015 Share Posted March 11, 2015 Out of interest what was the volume of material for the model? Link to post Share on other sites More sharing options...
Multiple identity account Posted April 2, 2015 Share Posted April 2, 2015 Hi Petri, I need some advice on resin casting....Can I PM you for some tips please? It looks excellent. The 3D print quality is also spectacular. Link to post Share on other sites More sharing options...
Petri Sallinen Posted September 3, 2015 Author Share Posted September 3, 2015 We have got resin cast parts ready using the "green" 3D parts as masters. Rest parts of the model were etched in nickel silver and stainless steel. We have also built the first bodies ready — the chassis is still missing. The scale of our model is 1:87. Please enjoy my pictures. Petri Sallinen Helsinki, Finland Link to post Share on other sites More sharing options...
Hawk Posted September 10, 2015 Share Posted September 10, 2015 The model looks fantastic. It is incredible what you have achived! Could you tell us a bit more about how you made the RTV moulds and resin castings? Link to post Share on other sites More sharing options...
Pugsley Posted September 10, 2015 Share Posted September 10, 2015 Stunning! Link to post Share on other sites More sharing options...
Petri Sallinen Posted October 14, 2015 Author Share Posted October 14, 2015 We have got the locomotive ready. Petri Helsinki, Finland Link to post Share on other sites More sharing options...
richbrummitt Posted October 20, 2015 Share Posted October 20, 2015 Echoing what Hawk asked: The model looks fantastic.It is incredible what you have achieved!Could you tell us a bit more about how you made the RTV moulds and resin castings? Link to post Share on other sites More sharing options...
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