Chapter 13. ACS—Forehearth Advanced Control Strategy for Glass Stability and Homogeneity

  1. John B. Wachtman Jr
  1. Glen E. Kindall

Published Online: 26 MAR 2008

DOI: 10.1002/9780470314098.ch13

A Collection of Papers Presented at the 53nd Conference on Glass Problems: Ceramic Engineering and Science Proceedings, Volume 14, Issue 3/4

A Collection of Papers Presented at the 53nd Conference on Glass Problems: Ceramic Engineering and Science Proceedings, Volume 14, Issue 3/4

How to Cite

Kindall, G. E. (1993) ACS—Forehearth Advanced Control Strategy for Glass Stability and Homogeneity, in A Collection of Papers Presented at the 53nd Conference on Glass Problems: Ceramic Engineering and Science Proceedings, Volume 14, Issue 3/4 (ed J. B. Wachtman), John Wiley & Sons, Inc., Hoboken, NJ, USA. doi: 10.1002/9780470314098.ch13

Author Information

  1. BH-F (Systems), Inc. Maumee, OH 43537

Publication History

  1. Published Online: 26 MAR 2008
  2. Published Print: 1 JAN 1993

ISBN Information

Print ISBN: 9780470375242

Online ISBN: 9780470314098

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Keywords:

  • forehearth;
  • homogeneity;
  • characteristic;
  • influences;
  • melter

Summary

We will cover this subject by first reviewing the purpose of forehearths and their control. Along with outlining the objective of forehearth Control, we will review the conditions that must be dealt with by the forehearth and the control system. After the goals of forehearth control and the problems encountered have been defined, we will then look at the equipment and strategies that can be used to reach the goals. We will review the forehearth design in respect to its effect on good glass temperature control, and we will review glass temperature measurement and the current zone temperature control strategy. Then, the criteria for the Advanced Control Strategy (ACS) will be defined Based on these criteria, the ACS will be presented by explaining the individual components: exit temperature control, top-to-bottom thermal homogeneity control, side-to-center thermal homogeneity control, and feed for ward control.