glass tubing

[stevea2]

does anyone know how to get the "BOW" out of glass tubing when pulling...Im pulling a very soft lead glass into tubes about .154 diameter and i cant seem to get the bow out of the rod . any hints??????

 

[nbucska]

If you are worried about the sagging due to gravity, you should rotate both ends sinchronously e.g. on a glass lathe.

<nbucska@pcperipherals.com>

 

[stevea2]

we area actually pulling the glass from a furnace with a orfice and a puller at the other end. pulling about 8lbs per min. the kiln temp is about 2100f . for the pull but the tubing we are pulling is very bowed

 

[nbucska]

tried to pull vertically?

<nbucska@pcperipherals.com>