Method for Lubricating Molten Glass Forming Molds and Machine Using Such Molds

A method for lubricating a glass forming mold with a nozzle, the nozzle for spraying a lubricating media into the mold, the method comprising the steps of:

• displacing a nozzle from a resting position to a working position into the mold;
• moving the nozzle in the mold while spraying a lubricating media to lubricate an inner surface of the mold;
• applying a vacuum at least during the moving and spraying step to evacuate emissions;
• displacing the nozzle to a resting position allowing a loading of a gob in the mold, once the mold has been lubricated;
• and
• circulating the lubrication media in the nozzle before and after the moving and spraying step for at least one of avoiding stagnant lubrication media remaining in the nozzle and ensure constant mixing of solid particles in the lubrication media.

A nozzle for lubricating a glass forming mold, comprising:

• a supply line and a return line for lubrication media;
• a nozzle head with an exhaust for spraying of the lubrication media;
• and
• a piston configured to move to a first and a second position,
• wherein in the first position, the piston closes the nozzle head for the lubricating media so that the lubricating media remains in a closed circuit in the nozzle between the supply line and the return line, and
• wherein in the second position, the piston opens the nozzle head for the lubricating media so that the nozzle is configured to spray the lubricating media in the mold.

An IS machine for forming glass containers comprising:

• a spraying mechanism having a nozzle including,
• a supply line and a return line for lubrication media,
• a nozzle head with an exhaust for spraying of the lubrication media, and
• a piston configured to move to a first position and a second position,
• wherein in the first position, the piston closes the nozzle head for the lubricating media so that the lubricating media remains in a closed circuit in the nozzle between the supply line and the return line, and
• wherein in the second position, the piston opens the nozzle head for the lubricating media so that the nozzle is configured to spray the lubricating media in a mold.