Having problems fixturing a small section of a cone. Brittle material and can't use anything on the inside for support as that arc is not smooth. Trying to make a fixture that will repeat so we can use cad to measure the surface profile. We tried a magnet with a small lip but even with part against the stops we aren't sure what to use for alignment (thickness of part from OD to ID (after ID is finished) is 1.2mm which is what the 45° edges are (not much for manual hits:blah.
20230427134833855.pdf
I have made a mold of a part before with dental mold (we use it to get reproductions of parts for use on a comparator). (We primarily use Cuttersil Light, it is a green toothpaste tube and a bottle of red liquid hardener)
I will adhere to porous surfaces, but if you peel it just after it cures, it always comes off metal.
You say brittle, and it might not come off. If the parts are consistent enough, you could sacrifice one part to make the mold, then put the other parts on that mold.
The plasticene clay (the stuff for kids that is non-toxic and doesn't dry out), if you warm it up (like just above body temperature, not in an oven), it gets very soft. You might be able to make a mold to support your parts with that, and it should hold up to the pressure from a stylus.
Quick and easy, that's all I've got at the moment.
I have made a mold of a part before with dental mold (we use it to get reproductions of parts for use on a comparator). (We primarily use Cuttersil Light, it is a green toothpaste tube and a bottle of red liquid hardener)
I will adhere to porous surfaces, but if you peel it just after it cures, it always comes off metal.
You say brittle, and it might not come off. If the parts are consistent enough, you could sacrifice one part to make the mold, then put the other parts on that mold.
The plasticene clay (the stuff for kids that is non-toxic and doesn't dry out), if you warm it up (like just above body temperature, not in an oven), it gets very soft. You might be able to make a mold to support your parts with that, and it should hold up to the pressure from a stylus.
Quick and easy, that's all I've got at the moment.
.
20230427134833855.pdf
