Glass container coating process
AssigneeOwens-Brockway Glass Container Inc.
InventorsZhongming Wang, Carol A. Click, Michael P. Remington, D Wayne Leidy
Life of this patent
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Abstract
A process for forming coating on an interior surface of a glass container. A glass preform is formed at blank molding station from a gob of molten glass. Thereafter, a glass container is formed at a blow molding station from the glass preform. A coating material comprising a suspension of nanoparticles in a liquid medium is introduced into an interior of the glass preform or the glass container while the glass is still hot from being formed. Heat from the glass is transferred to the liquid medium to vaporize the liquid medium and form a coating on an interior surface of the glass preform or the glass container. Thereafter, the glass container is annealed.
Claims20
A process for coating an interior surface of a glass container that includes:
- (a) forming a glass preform from a gob of molten glass at a blank molding station;
- (b) transferring the glass preform from the blank molding station to a blow molding station and positioning the glass preform within a cavity defined by a blow mold;
- (c) forming a glass container having a final shape from the glass preform at the blow molding station by introducing compressed gas into the cavity and into an interior of the glass preform such that the glass is blown into contact with inner surfaces of the blow mold;
- (d) introducing a coating material comprising a suspension of nanoparticles in a liquid medium into an interior of the gob of molten glass, the glass preform, or the glass container while the glass is still hot from being formed such that heat from the glass is transferred to the liquid medium to vaporize the liquid medium and form a coating on an interior surface of the gob of molten glass, the glass preform, or the glass container;
- and then
- (e) annealing the glass container.
A process for coating an interior surface of a glass container that includes:
- (a) forming a glass preform having an initial shape from a gob of molten glass at a blank molding station during a blank molding stage;
- (b) transferring the glass preform from the blank molding station to a blow molding station during an invert stage and positioning the glass preform within a cavity defined by a blow mold;
- (c) forming a glass container having a final shape from the glass preform at the blow molding station during a blow molding stage by introducing compressed gas into the cavity and into an interior of the glass preform such that the glass is blown into contact with inner surfaces of the blow mold;
- (d) transferring the glass container from the blow molding station to a deadplate during a takeout stage;
- (e) introducing a coating material comprising a suspension of nanoparticles in a liquid medium into an interior of the gob of molten glass, the glass preform, or the glass container while the glass is at a temperature in the range of 700 degrees Celsius to 1200 degrees Celsius such that heat from the glass is transferred to the liquid medium to vaporize the liquid medium and form a coating on an interior surface of the glass preform or the glass container, wherein the coating material is introduced into the interior of the gob of molten glass, the glass preform, or the glass container during the blank molding stage, the invert stage, or the blow molding stage;
- and then
- (f) annealing the glass container.
Dependencies are inferred from the claim text.