Glass molding apparatus including adjustable cooling nozzles and methods of using the same
A molding apparatus for forming a glass article comprises a mold shell comprising a cooling surface comprising at least a first zone and a second zone; an adjustable nozzle system comprising a mold-facing surface having a plurality of apertures sized to receive a nozzle or a plug; a plurality of nozzles, each coupled to one of the apertures to direct a stream of fluid onto the cooling surface; and a fluid supply providing a fluid through the plurality of nozzles. The fluid is jetted through the nozzles to impinge against the first zone or the second zone of the cooling surface, and a number of nozzles through which the fluid is jetted to impinge against the first zone of the cooling surface is different than a number of nozzles through which the fluid is jetted to impinge against the second zone of the cooling surface.
1 . A method of cooling molten glass to form a glass article, the method comprising:
flowing molten glass into a cavity defined by a cooling surface of a mold shell, the cooling surface comprising a first zone and a second zone such that the first zone and the second zone are thermally isolated from one another;
supplying fluid to an adjustable nozzle system comprising a mold-facing surface having a plurality of apertures, each of the plurality of apertures sized to receive one of a plurality of nozzles; and
each of the plurality of nozzles coupled to and extending through a corresponding one of the plurality of apertures to direct a first stream of fluid onto the cooling surface of the mold shell to impinge against the first zone to cause a first cooling intensity and to direct a second stream of fluid to impinge against the second zone to cause a second cooling intensity, the first cooling intensity and the second cooling intensity drawing heat away from the molten glass, thereby cooling the molten glass to form a glass article, wherein the second cooling intensity is different from the first cooling intensity.
2 . The method of claim 1 , wherein a number of the plurality of nozzles directing the first stream of fluid to impinge against the first zone is greater than a number of the plurality of nozzles directing the second stream of fluid to impinge against the second zone.
3 . The method of claim 1 , wherein a temperature of the fluid impinging against the first zone is less than a temperature of the fluid impinging against the second zone.
4 . The method of claim 1 , wherein a diameter of the plurality of nozzles directing the first stream of fluid to impinge against the first zone is greater than a diameter of the plurality of nozzles directing the second stream of fluid to impinge against the second zone.
5 . The method of claim 1 , wherein an amount of fluid impinging against the first zone is greater than an amount of fluid impinging against the second zone.
6 . The method of claim 1 , wherein a flow rate of the first stream of fluid impinging against the first zone is greater than a flow rate of the second stream of fluid impinging against the second zone.
7 . The method of claim 1 , wherein the cooling surface comprises a deflector extending outward from the cooling surface, and wherein the deflector redirects the fluid impinging the first zone or the second zone to prevent the fluid from contacting the other of the second zone or the first zone of the cooling surface of the mold shell.
8 . The method of claim 1 , wherein the plurality of apertures comprises a first aperture with one of the plurality of nozzles inserted therethrough and a second aperture with a plug inserted therethrough.
9 . The method of claim 1 , wherein the molten glass flows through the cavity of the mold shell and the cooling surface is an outer surface of the mold shell.
10 . The method of claim 1 , wherein each of the plurality of nozzles directs a stream of fluid onto the cooling surface of the mold shell to remove heat from the mold shell.
11 . The method of claim 1 , wherein the plurality of nozzles direct multiple streams of fluid onto the cooling surface of the mold shell to impinge against the first zone to cause the first cooling intensity and direct multiple streams of fluid onto the cooling surface of the mold shell to impinge against the second zone to cause the second cooling intensity.
12 . The method of claim 1 , further comprising flowing the glass article from an outlet end of the cavity.