摘要:
A forehearth for the conveyance of molten glass has at least one cooling zone which includes a trough and a roof over the trough. A pair of spaced projections extend downwardly from the roof to define in the space below the roof a central channel over the central portion of the stream of molten glass and side channels over respective side portions of the stream of glass. The roof has at least one area of reduced thickness in the portion over the central channel. An enclosed upper cooling channel extends longitudinally of the forehearth over the area of reduced thickness and has an inlet and an outlet spaced longitudinally from the inlet. Heating means are provided for applying heat to each side portion of the stream of glass.
摘要:
An automatic cooling adjustment system for the forehearth of a glass furnace which enables the minimization of the amount of energy used in the forehearth. The system is utilized in a forehearth wherein a continually activated and adjustable cooling wind apparatus operates in conjunction with an electric or fuel fired heating system which controls or maintains the glass within a desired temperature range and at a predetermined temperature gradient range over the length of the forehearth. An automatic means is provided to adjust the amount of cooling wind and to maintain it at whatever level is required in order to minimize the opposing heating energy required. The system includes a timer which enables small automatic cooling wind adjustments during a first, relatively short time period and which enables temperature stabilization in the forehearth during a second, relatively long time period. The cycle of small adjustments is repeated as necessary to keep the heating system within pre-set energy limits.
摘要:
An improved glass melt tank (10) having a feeder (15) and a channel (14) which interconnects the tank and the feeder and in which is arranged a rotary, raisable and lowerable regulator (20, 21) which opens and closes the channel (14) so that the feeder (15) is supplied with molten glass from the tank (10) when a level sensing means (22) senses a lower level in the feeder, the supply of molten glass being caused to cease when an upper level is sensed. The regulator (20, 21) rotates continuously in order not to get stuck in setting glass and seals against a horizontal seat formed in the channel.