ARRANGEMENT AND PROCESS FOR TREATING A SURFACE

Abstract

An apparatus and method for treating a surface with a jet comprising a multiplicity of particles, the apparatus including at least one nozzle unit, which is designed for providing a stream of propellant gas mixed with a multiplicity of particles, and an enclosure of the nozzle unit, the enclosure being arranged at such a distance from the nozzle unit that a gap is formed between the nozzle unit and the enclosure.

Claims

1.-9. (canceled)

10. An apparatus for treating a surface with a jet comprising a multiplicity of particles, the apparatus comprising: at least one nozzle unit, configured to provide a stream of propellant gas mixed with a multiplicity of particles, and an enclosure of the nozzle unit, the enclosure arranged at such a distance from the nozzle unit that a gap is formed between the nozzle unit and the enclosure.

11. The apparatus of claim 10, wherein the enclosure is formed at least partially from a plastic.

12. The apparatus of claim 10, wherein the gap has the same extent at every point of the nozzle unit.

13. The apparatus of claim 10, wherein the nozzle unit comprises at least a mixing chamber and an inner nozzle.

14. The apparatus of claim 13, further comprising an inlet into the mixing chamber having an inlet cross-sectional area that differs from a nozzle cross-sectional area of the inner nozzle.

15. The apparatus of claim 10, further comprising a particle generator.

16. A process for treating a surface with a jet comprising a multiplicity of particles, utilizing the apparatus of claim 10.

17. The process of claim 16, wherein a stream of gas between the nozzle unit and the enclosure is generated.

18. The process according to claim 17, wherein the treating of the surface comprises at least one of the following steps: cleaning the surface, and removing flash or burr from the surface.

Description

BRIEF DESCRIPTION OF THE DRAWINGS

[0037] The invention and the technical environment are explained in more detail below on the basis of the FIGURE. The FIGURE shows a particularly preferred exemplary embodiment, to which however the invention is not restricted. In particular, it should be pointed out that the FIGURE, and in particular the relative sizes represented, are only schematic. In the FIGURE:

[0038] FIG. 1 schematically shows a lateral sectional representation of an arrangement for treating a surface.

DESCRIPTION OF PREFERRED EMBODIMENTS

[0039] FIG. 1 shows a lateral sectional representation of an arrangement 1 for treating a surface with a jet comprising a multiplicity of particles. The arrangement 1 comprises a nozzle unit 2, which is designed to provide a stream of propellant gas mixed with a multiplicity of particles. The nozzle unit 2 is surrounded by an enclosure 3. The enclosure 3 is arranged at such a distance from the nozzle unit 2 that a gap 4 is formed between the nozzle unit 2 and the enclosure 3.

[0040] The nozzle unit 2 comprises a mixing chamber 5 for mixing a stream of propellant gas with the multiplicity of particles. The nozzle unit 2 also comprises an inner nozzle 6 with an outlet 7, The nozzle unit 2 also comprises a particle generator 8, which is designed to generate the multiplicity of particles and introduce them into the mixing chamber 5 in a solid state. The particle generator 8 has a screen plate 11 and a conveying screw 12. By pressing a solid starting material 13 through the screen plate 11 by means of the conveying screw 12, the multiplicity of particles can be formed in a solid state and introduced into the mixing chamber 5.

[0041] Furthermore, the nozzle unit 2 has a propellant gas line 9 with a propellant gas nozzle 10 for introducing the propellant gas into the mixing chamber 5 by way of an inlet 14.

[0042] With the arrangement presented and the process presented for treating a surface, a particularly energy-efficient treatment of the surface can be achieved, in particular by thermal insulation and by suppressing the formation of condensed water. This applies in particular to cleaning and removing flash or burr. The arrangement and the process may be used in particular in the production of wire or plastic products.

LIST OF DESIGNATIONS

[0043] 1 arrangement [0044] 2 nozzle unit [0045] 3 enclosure [0046] 4 gap [0047] 5 mixing chamber [0048] 6 inner nozzle [0049] 7 outlet [0050] 8 particle generator [0051] 9 propellant gas line [0052] 10 propellant gas nozzle [0053] 11 screen plate [0054] 12 conveying screw [0055] 13 solid starting material [0056] 14 inlet

[0057] It will be understood that many additional changes in the details, materials, steps and arrangement of parts, which have been herein described in order to explain the nature of the invention, may be made by those skilled in the art within the principle and scope of the invention as expressed in the appended claims. Thus, the present invention is not intended to be limited to the specific embodiments in the examples given above.