Hot bent glass



The basic principle of hot bending curved glass processing is as follows:



Heat the cut flat glass evenly until



550 º C (hot bending annealing) -650 º C (hot bending tempering)



Left and right temperature



At this temperature, the glass becomes viscoplastic,Glass product .
Lose its brittleness and stiffness
 
 
 
Softened glass plates are placed on molds with specific bending forms
 
 
 
Annealed curved glass obtained by natural cooling after gravity deformation
 
 
 
Or after mechanical pressure forming by (clamping roller)
 
 
 
And quickly cooled to form tempered curved glass
 
 
 
Annealed glass has better optical quality
 
 
 
Mechanical pressure formed tempered curved glass
 
 
 
The optical quality is very sensitive to the mold
 
 
 
In theory, the hot bending process
 
 
 
Various surface forms can be obtained through specific molds
 
 
 
Like the common single curved arc (single bend)
 
 
 
S-curve (bending), spherical (composite bending)
 
 
 
For single curved glass
 
 
 
Glass hot bending is relatively easy
 
 
 
 
Common methods for bending hot bending glass
 
 
 
Aquarium glass and counter glass available
 
 
 
The main technical difficulties in bending glass are
 
 
 
Defects such as mold marks are prone to appear at straight edge bends and corners