COMPONENT FOR A MOTOR VEHICLE, AND METHOD FOR PRODUCING A COATED COMPONENT FROM A MAGNESIUM MATERIAL

Abstract

A component (10) for a motor vehicle has a main body (12) produced from a magnesium material. The main body (12) has a visible surface (14) with an arithmetic mean roughness Ra of 1 to 40 m. A clear lacquer coating (40) is disposed on the visible surface (14) of the main body (12) and has a layer thickness of at most 60 m. The clear lacquer coating (40) is applied so that the surface structure (15) of the main body (12) that is disposed below the clear lacquer coating (40) is distinguishable in a visible and haptic manner.

Claims

1. A component for a motor vehicle, comprising: a main body that is produced from a magnesium material, the main body having a visible surface with a surface structure having an arithmetic mean roughness Ra of 1 to 40 m; and a clear lacquer coating disposed on the visible surface of the main body, the clear lacquer coating having a layer thickness of at most 60 m, wherein the surface structure of the main body that is disposed below the clear lacquer coating is distinguishable in a visual and haptic manner.

2. The component of claim 1, wherein: the clear lacquer coating has a layer thickness of 5 to 40 m.

3. The component of claim 1, wherein: the clear lacquer coating has a clear lacquer surface with a mean roughness Ra of at least 0.5 m.

4. The component of claim 1, wherein: the main body is a magnesium casting.

5. The component of claim 1, wherein: the component is a visible motor-vehicle interior component.

6. A method for producing a coated component, comprising: providing a component made from a magnesium material and having a visible surface, basting the visible surface of the component using blasting elements, and applying a clear lacquer coating to the visible surface that has been machined by the blasting elements.

7. The method of claim 6, wherein the blasting elements are aluminum pellets.

8. The method of claim 7, wherein the aluminum pellets have a diameter of 0.6 to 1 mm.

9. The method of claim 6, wherein the clear lacquer coating has a matting agent and/or a tinting agent.

Description

BRIEF DESCRIPTION OF THE DRAWINGS

[0028] FIG. 1 schematically shows a main body of the component after primary forming.

[0029] FIGS. 2 and 3 schematically show the individual method steps of the method for producing a coated component from a magnesium material.

DETAILED DESCRIPTION

[0030] FIG. 1 shows a main body 12 of a component 10 to be coated. The main body 12 is produced from a magnesium material, for example AZ91, and has a visible surface 14 that is visible in the installed state of the component. The visible surface 14 has a non-homogenous surface structure 15 that has been created after the primary forming process. The surface structure 15 has troughs and peaks of various depths and heights, respectively. Moreover, the visible surface 14 has streaks and discolorations that have been created, for example, by release agents used in the die-casting process and/or by flows of the melt in the die-casting process.

[0031] FIG. 2 shows the first method step for producing a coated component 10 from magnesium material. The visible surface 14 of the main body 12 is blasted in this step by a blasting device 20, for example a pressure blasting or a wheel blasting device. The blasting device 20 aligns a blasting jet 24 with the visible surface 14 to propel a multiplicity of blasting elements 26 onto the visible surface 14. The blasting elements 26 are aluminum pellets 27 with a diameter of 0.6 to 1.0 mm and, by virtue of the mechanical properties thereof, clean, compact, and level the visible surface 14.

[0032] The non-blasted non-homogenous surface structure 15 is illustrated on the right of the blasting device 20 in FIG. 2, and a blasted surface structure 17 of the visible surface 14 is to the left of the blasting device 20. In contrast to the non-blasted surface structure 15, the blasted surface structure 17 has a finer, more compact and cleaned surface structure with an arithmetic mean roughness Ra of 2 to 6 m.

[0033] FIG. 3 shows the second method step for producing a coated component 10 from a magnesium material. The blasted surface structure 17 of the visible surface 14 is coated with a clear lacquer coating 40 in the second method step. The coating process is performed by a painting device 30 that produces a lacquer jet 34 aligned with the visible surface 14. A clear lacquer surface 42 that has the clear lacquer coating 40 is depicted to the left of the painting device 30, and the blasted surface structure 15 is depicted to the right of the painting device 30

[0034] The clear lacquer coating 40 has a layer thickness of 30 m, and the clear lacquer surface 42 has an arithmetic mean roughness Ra of 1.5 m. On account of the clear lacquer coating 40 of this type the metallic visible surface 14 that is covered by the clear lacquer coating 40 is distinguishable in a visual and haptic manner.

[0035] Constructive embodiments other than the embodiments described are within the scope of the invention.