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:
- Temperature stability
- Improved thermal homogeneity before spout
- Gob weight stability
- Higher forming productivity
- Minimizing time for job changes
- Temperature stability
- Stability of spread, producing reduced nip loss
- Tweel operation minimization
- 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)
- 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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Please contact us to receive more information, our latest presentation, or a quotation to purchase.