One of the things I want to do in 3D printing is make models for lost wax investment casting. In this case I would use PLA or one of the softer materials like Moldaly to make the model, bury it in investment and burn out the model in an oven. This is done and works well. But in cruising through the information on 3D printing available online, I was fascinated by the ability to print in metals using metallic powders. I found one service that can print in stainless steel, albeit with a copper content as well. This got me thinking. Rather than 3D print the model and use it once in an investment casting, why not print a permanent mould in metal that could be used many times. This would essentially be die casting, using a steel mould for aluminum casting.
The information I found on the stainless steel mould states that the material is somewhat porous which would be ideal for vacuum casting. Is there any experience with this on the forum? I would think that if this was possible it would be done a lot.
Don
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As a jeweler i print all my jewelry either straight to an investmemt (via wax filament) or make a mold using a somewhat harder/heat resistant silicon mould rather then a metal mold. It is cheaper and adjustments can be made on the fly for me. As well, the silicon moulding allows for great detail once set depending on the type of silicon used. You can also print in copper, brass, gold, silver and aluminium filament these days (although they are a mixture of the metal 80% usually and 20% plastic) it is possible to go straight to final product that way. I guess it really depends on what or who you are sesigning it for. If it is basically mass production i use the silicon mould method. Let me know if you want mord ino on the silicon mould i use (its a local brand name).
Yes i would like some info on the silicon mould. What temperature can it withstand? Have you used ceramic moulds? I am curious to know what temperatures they can stand. I need about 1400F for aluminum.
Don
I like to use a Silicon base from a company called Smooth On. They have a wide variety depending on your needs. They range from super soft squishy silicon to as hard as steel silicon. They are based out of the US so you should be able to find a local dealer and then work out what type of silicone works best for you. Aluminium is probably one of the easier metals woth a lower F melt point. Should have zero problem asking a local dealer to help you out. I would suggest you check out other silicone dealers as well. Due to me being in Canada i am limited for types here. If you live in the USA there are a multitude of others. Do a bit of research on the net. I do not use ceramic mould, however since i have a fairly large kiln the family does do alot of pottery or metal work. Hope this helps!
Yes I am familiar with Smooth On products. I am in Canada too and have ordered from the Edmonton store in the past. Sorry i thought your mention of silicon moulds meant a ceramic. I am familiar with using Silicone to make moulds for injecting wax. I am thinking of a permanent ceramic or metal mould into which you would pour the aluminum directly. This is die casting using permanent metal or ceramic moulds. I am curious if such moulds could be made on a 3D printer.
