NOZZLE BODY

Abstract

A method for producing a nozzle body and a nozzle body. The method includes at least partially processing a nozzle body blank produced by one of an injection molding process or a 3D printing process by laser processing to form the nozzle body. The nozzle body includes a frusto-conical section; at least one nozzle bore having a diameter of less than or equal to 300 μm coupling the frusto-conical section to an outside of the nozzle body; and at least one turbulence channel that is configured to communicate with the frusto-conical section and to taper in a direction toward to the frusto-conical section

Claims

1. A method for producing a nozzle body comprising: at least partially processing a nozzle body blank produced by one of an injection molding process or a 3D printing process by laser processing to form the nozzle body.

2. The method according to claim 1, wherein the at least partially processing comprises producing by the laser processing at least one nozzle geometry in the nozzle body blank.

3. The method according to claim 1, wherein the at least partially processing comprises producing by the laser processing at least one nozzle bore in the nozzle body blank.

4. The method according to claim 3, wherein the nozzle bore produced by the laser processing has a diameter less than or equal to 300 μm.

5. The method according to claim 1, wherein the laser processing comprises at least one of laser ablation, laser drilling, and 3D laser ablation.

6. The method according to claim 1, wherein the nozzle body comprises a hollow-cone geometry.

7. The method according to claim 2, wherein the at least one nozzle geometry comprises a surface, notch or undercut configured to convert a liquid into an aerosol to be ejected from the nozzle body.

8. The method according to claim 4, wherein the nozzle bore produced by the laser processing has a diameter less than or equal to 100 μm.

9. The method according to claim 1, wherein the nozzle body blank comprises at least one of PMMA (poly(methyl methacrylate)), POM (polyoxymethylene), PP (polypropylene), PE (polyethylene), ABS (acrylonitrile-butadiene-styrene copolymer), COC (cycloolefin copolymer), PA (polyamide), PC (polycarbonate), PBT (poly(butylene terephthalate)), PEEK (poly(ether ether ketone)), PEI (polyetherimide), PET (poly(ethylene terephthalate)), and PPE (poly(phenylene ether)).

10. A nozzle body comprising: an injection molded or 3D printed nozzle body blank that is a least partially processed by laser processing.

11. The nozzle body according to claim 10, wherein the laser processing comprises at least one of laser ablation, laser drilling, and 3D laser ablation.

12. The nozzle body according to claim 10, wherein at least one nozzle bore is produced by the at least partially processing of the nozzle body blank by the laser processing.

13. The nozzle body according to claim 12, wherein the at least one nozzle bore has a diameter of less than or equal to 300 μm.

14. The nozzle body according to claim 13, wherein the at least one nozzle bore has a diameter less than or equal to 100 μm.

15. The nozzle body according to claim 10, further comprising a hollow-cone nozzle geometry.

16. The nozzle body according to claim 10, further comprising at least one nozzle geometry that is a surface, a notch or an undercut that is configured to convert a liquid into an aerosol to be ejected from the nozzle body.

17. The nozzle body according to claim 16, wherein the at least one nozzle geometry comprises at least one turbulence channel recessed below a surface of the nozzle body blank and a frusto-conical section recessed below the at least one turbulence channel.

18. The nozzle body according to claim 17, wherein the at least one turbulence channel is structured to taper toward the frusto-conical section.

19. The nozzle body according to claim 10, wherein the nozzle body blank comprises at least one of PMMA (poly(methyl methacrylate)), POM (polyoxymethylene), PP (polypropylene), PE (polyethylene), ABS (acrylonitrile-butadiene-styrene copolymer), COC (cycloolefin copolymer), PA (polyamide), PC (polycarbonate), PBT (poly(butylene tercphthalate)), PEEK (poly(ether ether ketone)), PEI (polyetherimide), PET (poly(ethylene terephthalate)), and PPE (poly(phenylene ether)).

20. A nozzle body comprising: a frusto-conical section; at least one nozzle bore having a diameter of less than or equal to 300 μm coupling the frusto-conical section to a nozzle outlet surface; and at least one turbulence channel that is configured to communicate with the frusto-conical section and to taper in a direction toward to the frusto-conical section.

Description

BRIEF DESCRIPTION OF THE DRAWINGS

[0034] The present invention is further described in the detailed description which follows, in reference to the noted plurality of drawings by way of non-limiting examples of exemplary embodiments of the present invention, in which like reference numerals represent similar parts throughout the several views of the drawings, and wherein:

[0035] FIG. 1 shows a schematic illustration of a nozzle body blank,

[0036] FIG. 2 shows a schematic top view of a nozzle body blank,

[0037] FIG. 3 shows a schematic sectional illustration of a nozzle body blank,

[0038] FIG. 4 shows a schematic sectional illustration of a nozzle body, and

[0039] FIG. 5 shows an enlarged view of a nozzle bore of a nozzle body.

DETAILED DESCRIPTION

[0040] The particulars shown herein are by way of example and for purposes of illustrative discussion of the embodiments of the present invention only and are presented in the cause of providing what is believed to be the most useful and readily understood description of the principles and conceptual aspects of the present invention. In this regard, no attempt is made to show structural details of the present invention in more detail than is necessary for the fundamental understanding of the present invention, the description taken with the drawings making apparent to those skilled in the art how the several forms of the present invention may be embodied in practice.

[0041] FIG. 1 shows a perspective view of a nozzle body blank 1 that has been produced by an injection molding process or 3D printing process. The produced nozzle body blank 1 may include, to the extent that is it possible by the injection molding process or 3D printing process, several nozzle geometries, such as plural turbulence channels 2. e.g., three turbulence channels, and a frusto-conical section 3. However, the produced nozzle body blank 1 does not yet have a nozzle bore.

[0042] FIG. 2 shows a schematic top view of the nozzle body blank 1. It can thereby be recognized that, while the nozzle bore has not yet been produced, to the extent possible, turbulence channels 2 and frusto-conical section 3 are provided in nozzle body blank 1.

[0043] FIG. 3 shows a schematic sectional illustration of nozzle body blank 1 in FIG. 2, which includes turbulence channels 2 and the frusto-conical section 3. As noted above, these nozzle geometries are produced in the nozzle body blank 1, to the extent possible, by the injection molding process or 3D printing process. In this regard, nozzle geometries having dimensions greater than 300 μm can be produced by the injection molding process or 3D printing process in nozzle body blank 1.

[0044] FIG. 4 shows a schematic sectional view of a completed nozzle body 4. Like nozzle body blank 1, nozzle body 4 likewise comprises turbulence channels 2 and a frusto-conical section 3. Further, nozzle body 4 comprises a nozzle bore 5, which has been produced in nozzle body blank 1 by laser processing.

[0045] Nozzle bore 5, which is schematically illustrated in FIG. 5, shows the detailed portion of nozzle body 4 in FIG. 4. Nozzle bore 5 is formed with a diameter X which, in the present case, is any diameter less than 300 μm, in particular 250 μm or less, 200 μm or less, 150 μm or less, or 100 μm or less. Preferably, the diameter X of nozzle bore 5 is less than 100 μm. The term “less than” (<) shall be understood as meaning “less than or equal to” (≤).

[0046] While some of the nozzle geometries, such as, e.g., turbulence channels 2 and/or frusto-conical section 3, may be produced by the injection molding process or the 3D printing process, nozzle bore 5 is produced by laser processing. Moreover, it is understood that nozzle, alternatively or additionally, the nozzle geometries, e.g., frusto-conical section 3 and/or turbulence channels 2, in nozzle body blank 1 can be formed entirely or further defined/created via laser processing of nozzle body blank 1. In this regard, in contrast to nozzle body blank 1 illustrated in FIG. 1, a nozzle body blank can be produced without a frusto-conical section 3 and/or turbulence channels 2 via the injection molding process or 3D printing process, as well as without a nozzle bore. Frusto-conical section 3 and/or turbulence channels 2 may be created in the injection molded or 3D printed nozzle body blank laser processing methods. While the nozzle blank 1 illustrated in FIGS. 1-3 shows three turbulence channels 2, it is understood that this number of turbulence channels 2 is merely an example and can differ from the number depicted without departing from the spirit and scope of the claimed embodiments.

[0047] A principal component of nozzle body 4 or nozzle body blank 1 is a plastic material. With the plastic material, laser processing is possible in which a laser beam first penetrates into the workpiece (nozzle body blank 1) and processes the workpiece on a surface lying opposite of the penetration site. Furthermore, laser ablation, laser drilling, and/or 3D laser ablation and combinations thereof can be understood to be within the scope of the laser processing described in this application.

[0048] A principal component of nozzle body blank 1 is selected in accordance with the laser processing method to be used in forming the nozzle body. By way of example, transparency properties of the plastic material can be taken into account. Thus, in the course of the processing by the laser ablation described above, transparent plastic is used as a principal component of the nozzle body blank 1. For other laser processing methods, non-transparent plastics can also be used. The nozzle body blank/nozzle body can comprise at least one of the following materials as the principal component: PMMA (poly(methyl methacrylate)), POM (polyoxymethylene), PP (polypropylene), PE (polyethylene), ABS (acrylonitrile-butadiene-styrene copolymer), COC (cycloolefin copolymer), PA (polyamide), PC (polycarbonate), PBT (poly(butylene terephthalate)), PEEK (poly(ether ether ketone)), PEI (polyetherimide), PET (poly(ethylene terephthalate)), and PPE (poly(phenylene ether)). A combination of the stated principal components can also be used, such as, e.g., a mixture of PE and PP.

[0049] Laser ablation, also called pulsed laser deposition, refers to removal of material from a surface by bombardment with pulsed laser radiation. The laser radiation used here, which has a high power density, leads to a rapid heating and formation of a plasma on the surface.

[0050] In laser drilling, so much energy is locally introduced into the workpiece by laser radiation that the material is fused and partially evaporated. The ionized vapor is expelled by the different pressure between the ambient environment and the location of the bore. A fusing of the material at the edge of the bore is thereby not desired.

[0051] 3D laser ablation corresponds to the laser ablation previously described above, with the workpiece being processed in three-dimensional space by the 3D laser ablation. As a result, an undercut or other geometries can be produced, for example.

[0052] It is noted that the foregoing examples have been provided merely for the purpose of explanation and are in no way to be construed as limiting of the present invention. While the present invention has been described with reference to an exemplary embodiment, it is understood that the words which have been used herein are words of description and illustration, rather than words of limitation. Changes may be made, within the purview of the appended claims, as presently stated and as amended, without departing from the scope and spirit of the present invention in its aspects. Although the present invention has been described herein with reference to particular means, materials and embodiments, the present invention is not intended to be limited to the particulars disclosed herein; rather, the present invention extends to all functionally equivalent structures, methods and uses, such as are within the scope of the appended claims.

LIST OF REFERENCE NUMERALS

[0053] 1 Nozzle body blank [0054] 2 Turbulence channels [0055] 3 Frusto-conical section [0056] 4 Nozzle Body [0057] 5 Nozzle bore