Method for air quenching an elongated glass hollow body comprising an axial bore
Inventors
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Assignees
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CrossjectCrossject is a specialty pharmaceutical company focused on drug-device combination products for emergency medicine. Leveraging a proprietary needle-free auto-injection platform, the company develops and manufactures fast-acting treatments for life-threatening situations such as epilepsy, adrenal crisis, and anaphylaxis. Crossject conducts advanced regulatory development, clinical validation, and large-scale industrialization to deliver innovative therapies for global markets, with an emphasis on simplicity, reliability, and patient usability.
Crossject is a specialty pharmaceutical company focused on drug-device combination products for emergency medicine. Leveraging a proprietary needle-free auto-injection platform, the company develops and manufactures fast-acting treatments for life-threatening situations such as epilepsy, adrenal crisis, and anaphylaxis. Crossject conducts advanced regulatory development, clinical validation, and large-scale industrialization to deliver innovative therapies for global markets, with an emphasis on simplicity, reliability, and patient usability.
Publication Number
US-11939254-B2
Publication Date
2024-03-26
Expiration Date
Abstract
An installation for quenching a glass hollow body includes a plurality of external nozzles and an axial nozzle. The plurality of external nozzles are positioned around a main axis. Each of the plurality of external nozzles includes an axial slot configured to direct an air jet towards the main axis. The axial nozzle is aligned along the main axis and includes a shape configured to form an internal air jet forming a ring with an opening at a center thereof in a plane transverse to the main axis. The axial nozzle forming the internal air jet positioned substantially external to and above the bore.
Core Innovation
The invention provides an installation for quenching a glass hollow body using air quenching. The installation includes a plurality of external nozzles positioned around a main axis, where each external nozzle comprises an axial slot configured to direct an air jet towards the main axis. An axial nozzle is aligned along the main axis and has a shape configured to form an internal air jet forming a ring with an opening at a center thereof in a plane transverse to the main axis.
The axial nozzle forming the internal air jet is positioned substantially external to and above a bore extending along the main axis. The shape comprises an axial core connected by radii to an external contour, so that the axial nozzle configuration provides a structured internal air jet geometry including a ring and a central opening. In the described arrangement, the internal air jet is formed to include a central recess at the center in a transverse plane.
In addition, the external nozzle cylinders are motorized to rotate during blasting. The described results compare prior-art air-quenching showing unequal compressive inner-wall residual stresses along tube height, versus the installation that combines an internal crown air jet with a central recess and rotated external jets, yielding more uniform inner-wall residual stress and faster, better-distributed temperature drop.
Claims Coverage
The independent claim covers a quenching installation having two air-jet systems: multiple external nozzles with axial slots directing air jets toward a main axis, and an axial nozzle that forms an internal air jet as a ring with a central opening in a transverse plane. It further defines the axial nozzle’s position relative to a bore extending along the main axis and requires a specific axial core connected by radii to an external contour. Dependent claims refine slot extent over an external surface height and require rotation of the external nozzles about the main axis during air-jet blasting.
External nozzles with axial slots directing air jets to the main axis
A plurality of external nozzles positioned around a main axis, wherein each of the plurality of external nozzles comprises an axial slot configured to direct an air jet towards the main axis.
Axial nozzle forming internal ring air jet with central opening
An axial nozzle aligned along the main axis and comprising a shape configured to form an internal air jet forming a ring with an opening at a center thereof in a plane transverse to the main axis.
Axial nozzle positioned substantially external to and above the bore
The axial nozzle forming the internal air jet is positioned substantially external to and above a bore extending along the main axis.
Axial core connected by radii to an external contour
The shape comprises an axial core connected by radii to an external contour.
Axial slot extends substantially over the outer surface height
Each of the external nozzles is characterized in that the axial slot runs substantially the full height of the outer surface of a glass hollow tube aligned with the main axis.
External nozzles rotate about the main axis during air-jet blasting
A plurality of external nozzles rotate about the main axis while blasting air jets directed to the main axis.
Overall, the claim set centers on combining external axial-slot air jets directed toward the main axis with an axial nozzle positioned above and external to the bore that forms an internal ring air jet with a central opening, where the nozzle shape is defined by an axial core connected by radii to an external contour. Dependent coverage refines the axial slot extent over the outer surface height and requires rotation of the external nozzles about the main axis during blasting.
Stated Advantages
More uniform inner-wall residual stress.
Faster temperature drop.
Better-distributed temperature drop.
Documented Applications
Suitability for forming a glass-tube reservoir of a needleless injection device (glass-tube reservoir, plunger, pressurized gas).
Air-quenching application for elongated glass hollow bodies with an axial bore, including comparison of residual stress and cooling-rate/temperature-drop behavior.
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