The cleaned glass enters the positioning station, where the longitudinal and transverse sides of the panes are aligned with repeatable accuracy according to their respective geometry.
The transfer unit, equipped with impression-free suction cups, lifts the positioned glass panes. Non-occupied cups are closed automatically. The transfer unit transports the glass via precise linear guides to the assembly position.
From a choice of different PVB film coils, the suitable one is selected and handed over to the operating personnel.
The next pane is then placed on top, accurately aligned, and the sandwich is assembled. Then the operator releases the sandwich so that it moves over to the nip rollers where the laminated glass is pressed to remove any air bubbles and heated to soften the PVB.
Step 5: After leaving the nip zone, the glass package is conveyed to the exit and then is transported to an auto-clave cart.
The nipped glass enters the autoclave where the final clear laminated glass state is achieved by a specific cycle of pressure (8-10 bar) and heat (100 to 150 degree).
Properties of Laminated Glass .
Float Glass in different thickness is basically used in the form of clear, tinted, reflective, tempered and heat strengthened glass. The PVB exhibits an extraordinary resistance in terms of UV transmission but does not reduce the visible light in the light spectrum.
• PVB thickness --0.38mm, 0.76mm, 1.14mm, 1.52mm
• PVB colors --Clear, white, gray, purple, blue, green, yellow, orange, red
• Refractive Index -- 1.48
• Visible Light Transmittance, Clear -- 89%
• Shading Coefficient, Clear -- 0.92
• UV Screening, up to 380 nm -- 99%
• Tensile Strength -- 3220 psi
• Tensile Elongation -- 205% (JIS K6771)
• Specific Gravity -- 1.07
• Specific Heat -- 0.47 Btu/lb°F
• Thermal Conductivity (K value) -- 0.12 Btu/(ft2hr°F)
• Coefficient of Thermal Expansion -- 2.6 x 10-4 in./in.°F
• Emissivity -- 0.9