Apparatus for producing a cooling or lubricating spray

Abstract

An apparatus for delivering a spray of cooling liquid to opposed shear blades of an apparatus for shearing a stream of molten glass into gobs, the apparatus having liquid outlets ( ) that lead to spray nozzles. A liquid is intermittently delivered at a low pressure to the liquid outlets ( ) from separate liquid inlets ( , respectively), each of the outlets ( ) having a solenoid valve ( , respectively), in a line leading thereto. The nozzles that receive liquid from the outlets ( ) are periodically purged of accumulated coagulated coolant or other debris by pumping coolant therethrough at a substantially higher pressure. To this end, each of the liquid outlets ( ) is connected to an outlet from a rodless cylinder ( , respectively), and high pressure air from a common inlet ( ) is intermittently imposed on an inlet to each rodless cylinder ( ) to urge pistons in the rodless cylinders toward the outlets from the rodless cylinders ( , respectively) to expel liquid coolant in the rodless cylinders ( ) toward the liquid outlets ( , respectively) at a substantially higher pressure. A solenoid valve ( ) is positioned in the high pressure air inlets to the rodless cylinders ( , respectively) to limit the pressurization of the liquid outlets ( ) on a timed basis so that nozzle clogging is eliminated.