EXPERT SYSTEM ES III™

Forehearth Advanced Control

Conditioning is, besides the furnace, responsible for determining the glass quality, and this is what counts in the end.

ES III™ can be used with any type of forehearth/feeder:

  • Fossile
  • Electrical
  • Mixed: Fossile and Electrical

Specific Benefits:

Container Glass
  • Temperature stability
  • Improved thermal homogeneity before spout
  • Gob weight stability
  • Higher forming productivity
  • Minimizing time for job changes
Flat Glass
  • Temperature stability
  • Stability of spread, producing reduced nip loss
  • Tweel operation minimization
Reinforcement Fibres
  • Stable delivery conditions
  • Temperature stability
  • Stability of glass conditioning before fiberizing
  • Minimizing time for job changes
  • Reduced defects and breakages
  • Improved quality of fiber production (diameter)
Insulation Fibres
  • Stable delivery conditions
  • Temperature stability
  • Stability of glass conditioning before fiberizing
  • Minimizing time for job changes

Example 1: ES III™ control of feeder job change

Operator only needs to specify new production temperature for the article (9-grid or spout).

ES III™ controls simultaneously all heatings and coolings of entire feeder in one controller, also during the job changes, to reach required new setpoint at optimal homogeneity.

ES III™ takes into account variations in upstream temperatures and various residence time of glass in feeder at different pulls to control 9-grid temperatures.

Example 2: ES III™ feeder setpoint control

ES III™ adjusts setpoints continuously to improve homogeneity:
Zone 3 and 2 setpoints control 9-grid middle and bottom, Zone 1 setpoint controls 9-grid top.
PID still controls each zone separately to required setpoint (ES III™ / PID in cascade).

Result: ES III™ automatic 9-grid control

ES III™ automatic direct control of 9-grid process values after a setpoint increase.

Figure displays Middle Top, Bottom Left and Bottom Right temperatures.

Further Information:

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