GLASS INDUSTRY
Glass Processing Capabilities
Glass melting Glass forming Sheet glass forming Automotive windshield, automotive backlight Glass pressing Automotive headlights, TV panels, funnels Compression molding Various consumer products	Blow/vacuum forming Bottles Jars Glass packaging Structural integrity under impact loading Failure strength Static/dynamic analysis Customized process simulation software
Glass Melting Analysis Objectives
Understand furnace flow characteristics Determine: - Flame shape - Glass temperature - Port size and shape changes to improve    flow distribution - Thermal field in the furnace - Convective glass flow - The performance of the furnace
Glass Forming Analysis Objectives
Sheet Glass Forming Mold design Determine process parameters (production speed) Glass Pressing Glass temperature before take out Mold temperature cycle (fatigue) Estimate mold life	Compression Molding Melt front history, knit points Ram pressure Temperature/pressure distribution Blow/Vacuum Forming Parison shape design Finished part thickness distribution Finished part temperature distribution
Blow Molding Analysis
Pressing Cycle (Parison Forming) Parison Stretching Low & High Pressure Blow
Pressing Cycle (Parison Shape Forming Analysis)
Input:
Initial mold and plunger temperatures (uniform or nonuniform) Gob temperature Gob in-mold time	Plunger water cooling rate and inlet water temperature Plunger travel (distance vs. time) Material properties Heat transfer coefficients
Analysis:
Compression molding analysis to predict movement of the glass front Heat transfer analysis to predict plunger glass and mold temperatures in time
Deliverables:
Parison temperature distribution with time (from gob shape to final parison shape) Plunger and mold temperature distribution with time during the entire pressing cycle.
Parison Stretching (Elongation Under Gravity Loading)
Input:
Time for free elongation (Time between the blank mold and plunger removed) Gravitation forces and low pressure air is applied Heat transfer coefficients
Analysis:
Deformation and heat transfer analysis
Deliverables
Parison Shape - Thickness distribution - Temperature distribution
Low and High Pressure Blow Cycle (Blow Molding)
Input:
Low and high air pressure profile Heat transfer coefficients
Analysis:
A non-linear, incremental deformation and transient heat transfer analysis
Deformation analysis is performed leading to new parison shape A thermal link between parison and mold (glass-to-metal contact conduction elements) is established for areas of physical contact between parison and finish mold Non-linear transient heat transfer analysis is performed with new thermal boundary conditions New temperature distribution for parison and finish mold is obtained Material properties at various locations of parison are updated from new temperature distribution
Steps (1 through 5) are repeated until final product is formed. Thereafter, transient heat conduction analysis is performed during time glass is in mold.
Deliverables:
Final product thickness distribution Parison thickness distribution with time as it approaches the final product thickness distribution. Parison and mold temperature distribution at each time increment Parison deformation and mold interaction with time