David Duke
01-05-2006, 9:54 PM
I have a design for a clock that I'm building that will require curved glass. Awhile back I saw a show on the Discovery Channel that showed the process of bending flat glass, it went somewhere along this procedure
Have a bed of sand, in the sand use a board cut to the desired profile/curve drag it across the sand making an indention (much like when pulling concrete down flat with a drag). Lay the glass across the profiled sand bed, heat to the required temperature in a furnace allowing the glass to sag/bend to the profile made in the sand, slow cool.
My question is what is the temperature needed to achieve glass movement, I have tried an internet search without much luck except in finding the temp for tempering glass which I believe is about 650/700*C or around 1200/1300*F. Would this be about right for the bend? Also how long should the cool down period be, I was thinking 4-6 hrs.
I know this is way off topic but I have faith in you guys :D :D :D !!
TIA
Have a bed of sand, in the sand use a board cut to the desired profile/curve drag it across the sand making an indention (much like when pulling concrete down flat with a drag). Lay the glass across the profiled sand bed, heat to the required temperature in a furnace allowing the glass to sag/bend to the profile made in the sand, slow cool.
My question is what is the temperature needed to achieve glass movement, I have tried an internet search without much luck except in finding the temp for tempering glass which I believe is about 650/700*C or around 1200/1300*F. Would this be about right for the bend? Also how long should the cool down period be, I was thinking 4-6 hrs.
I know this is way off topic but I have faith in you guys :D :D :D !!
TIA