WarmGlass.com

A broad cone shape (the shape of a martini glass) is one of the most difficult shapes to make using a torch. Has anyone had experience with making this shape by slumping the glass into a mold?

Very nice work indeed, Marty! Since I'm looking for steeper sides than your bowls, and a flat place about 3/4" in diameter on the bottom, I was thinking that two graduated molds might be the solution. Does this sound reasonable? I'll be using borosilicate glass for this project.

Hi Mike,

I don't have pictures of the cone shaped light fixtures I made years ago but the way I was able to get it shaped was a custom spun SS molds. These were fairly large fixtures and deep. I did slump the pieces into a larger mold first just to get the glass to start forming into a bowl type shape, I didn't want the glass to ruffle or wrinkle. How big is this going to be? You can get a circle cut from SS to put into the bottom of the cone shaped mold too where you want the base to be. Another way would be to do a drop mold and have the cone shape for the piece to slump into.

Good luck.

Patty
http://www.pattygray.com

http://www.schlanserdesign.com/frmset.htm

As I understand it, a lot of Schlanser's work is dropouts with the rims removed.


Ron

These are going to be fairly small, about four inches in diameter. I figure to roll the stainless into a cone, weld the joint and grind it smooth. Then I'll tack a small circle of stainless on for the bottom. I want an angle of around 45 degrees for the finished piece, so I'm hoping two molds (30 and 45 degrees) will do the job.

Mike, if you need these made out of boro you might want to check on a lampworker board for a supplier. A lot of goblet parts are pre fabbed and easily available, as I understand it.