Post by muttleytm on Jul 25, 2024 19:20:15 GMT -5
I know next to nothing about molding & casting. I do know that generally to cast a rigid part you use a flexible mold like a rubber bold for a plaster of Paris casting.
In my case I'm thinking of molding a two part casting and using a 3D printed mold. The part to be cast would basically the three thin sides around a rectangular mold. The thickness I'm not sure, maybe 3-5mm thick.
Actually the shape isn't a rectangle, it is a little more complex, something like this:
It would be open on the bottom and the diagonal front side on the right side of the image and the vertical face on the left side of the image. I may also make it thicker along those two open sides and have some slots in it to run some flat plastic into the slots.
I have read that 3D printed molds that are made up of several pieces which can be taken apart to allow them to be taken off the molded part can be used. The example I read about was with casting plaster of Paris.
I suppose I would actually pour into something like the above with some sides only upside down from the image above.
In addition to knowing next to nothing about molding and casting I also don't know much about 3D printing and CAD, but is seems like it might be fairly easy to draw the mating surface to the above and leave room for whatever thickness plastic I go with.
If it were a rectangle the height x 2 plus the top (3 sides) would be about 30" (762mm) x and the width would be about 30" (762mm)
I'd like a little reality check before I start down this road.
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In my case I'm thinking of molding a two part casting and using a 3D printed mold. The part to be cast would basically the three thin sides around a rectangular mold. The thickness I'm not sure, maybe 3-5mm thick.
Actually the shape isn't a rectangle, it is a little more complex, something like this:
It would be open on the bottom and the diagonal front side on the right side of the image and the vertical face on the left side of the image. I may also make it thicker along those two open sides and have some slots in it to run some flat plastic into the slots.
I have read that 3D printed molds that are made up of several pieces which can be taken apart to allow them to be taken off the molded part can be used. The example I read about was with casting plaster of Paris.
I suppose I would actually pour into something like the above with some sides only upside down from the image above.
In addition to knowing next to nothing about molding and casting I also don't know much about 3D printing and CAD, but is seems like it might be fairly easy to draw the mating surface to the above and leave room for whatever thickness plastic I go with.
If it were a rectangle the height x 2 plus the top (3 sides) would be about 30" (762mm) x and the width would be about 30" (762mm)
I'd like a little reality check before I start down this road.