Vitreous fused silica rollers are used specially as transport rollers for tempering flat glass. This method has been used for many years in the manufacture of tempered safety flat glass. The product is used mainly as architectural glass, e.g. for shop-window glass, curtain walls, glass doors, etc. Tempered safety glass is also used in automotive industry.
Vitreous fused silica rollers are used in both conventional (glass) annealing furnaces and furnaces with reversible material flow from various furnace manufacturers and operators. HALDENWANGER vitreous fused silica rollers are in successful use throughout the world in the flat glass industry.
Figure 1. Flat glass vitreous silica rollers and rollers with metal end caps (inset).
Physical Properties
|
|
|
SiO2
|
%
|
99.6
|
|
Density
|
g/cm3
|
1.92-2.00
|
|
Flexural Strength
|
MPa 20°C
|
30-40
|
|
|
MPa 700°C
|
45-60
|
|
Young’s Modulus
|
GPa
|
30-40
|
|
Thermal Expansion
|
10-6 K-1
|
0.5-0.9
|
|
Water Absorption Capacity
|
%
|
4.5-6.0
|
|
Porosity
|
Vol.%
|
10-14
|
|
Average Pore Diameter
|
µm
|
≤0.4
|
Metal End Caps
HALDENWANGER can supply our vitreous fused silica rollers with fitted metal end-caps on request. The following illustrations show some designs that are used in the various types of furnaces in the glass industry.
.jpg)
.jpg)
Source: Morgan Advanced Materials
For more information on this source please visit Morgan Advanced Materials.