Production of improved nozzle discs by laser machining

The laser processing device and method streamline the production of nozzle slices by simultaneously drilling multiple nozzle openings with optimized geometries, addressing inefficiencies in existing methods and achieving improved performance in aerosol generation and fluid transfer.

WO2025056103A1 Publication Date: 2025-03-20NEBU TEC MED PROD EIKE KERN GMBH
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Patent Information

Application Number
PCT/DE2023/100683
Authority / Receiving Office
WO · WO
Patent Type
Applications
Current Assignee / Owner
Filing Date
2023-09-13
Publication Date
2025-03-20

AI Technical Summary

Technical Problem

Existing methods for producing nozzle slices with optimized nozzle geometries for efficient aerosol generation and fluid transfer are inefficient, requiring multi-step processes and precise parameter control, which are time-consuming and difficult to scale.

Method used

A laser processing device and method that simultaneously drills multiple nozzle openings with desired geometries on a raw material tape, using a laser beam source and a diffractive element to generate a grid-shaped arrangement of partial rays, allowing for precise control of nozzle geometry and rapid production.

Benefits of technology

This approach enables the rapid and economical production of nozzle slices with optimized nozzle geometries, achieving improved droplet size distribution and energy efficiency in aerosol generation and fluid transfer applications.

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Abstract

The invention relates to an improved nozzle disc for use in a fluid transfer device, in particular an atomiser, and to a laser machining apparatus, an arrangement and a method for producing such a nozzle disc by means of laser machining. The nozzle disc has a nozzle geometry with a tapering factor, i.e. a ratio of a surface area of a nozzle inlet opening to the surface area of a nozzle outlet opening, of 10 or more, in particular 20 or more, particularly preferably 100 or more. The apparatus comprises a laser beam source for emitting a laser beam to laser optics, wherein by means of a beam-forming element the laser beam can be split into a plurality of partial beams arranged in a grid, and a controller with a control unit for controlling the laser beam source and the laser optics, wherein the control unit controls the laser beam source and / or the laser optics in such a manner that the partial beams generated by the laser optics simultaneously drill a plurality of nozzle openings in a first desired grid arrangement, and drill each of the nozzle openings completely or partially into the blank with a desired nozzle geometry.
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