Glass manufacturing – Processes – Cooling of molten glass
Patent
1990-06-14
1991-10-08
Lindsay, Robert L.
Glass manufacturing
Processes
Cooling of molten glass
65346, 65356, 65136, C03B 523
Patent
active
050551230
ABSTRACT:
The invention provides a method and apparatus for equalizing the temperature of molten glass (2) over the cross-section of a stream thereof advancing through a refractory forehearth from a glass furnace to a glass working machine. To this end, cooling air is blown downwardly to strike the mid-line of the stream, and is then evacuated upwardly from locations on either side of the mid-line, in such manner that substantial side regions of the stream surface are preserved from cooling contact with the cooling air. Apparatus for this purpose comprises refractory blocks (4a, 4b) which can be assembled to form a forehearth superstructure or roof, the blocks having hollow formations which unite on assembly thereof to form feed (11) and return (12, 13) channels for the cooling air, as well as inlet (8) and exhaust (9, 10) ducts for directing it at the molten glass and recovering it thereafter.
REFERENCES:
patent: 2767518 (1956-10-01), Schmid
patent: 3582310 (1971-06-01), Avery et al.
patent: 4622059 (1986-11-01), Brown
patent: 4680051 (1987-07-01), Blumenfeld et al.
Blumenfeld & Bubon, Forehearth Technology, Glass, Apr. 1985, pp. 121, 123 and "Appendix 3".
Ardagh Glass Limited
Lindsay Robert L.
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