Covering device for covering at least one region of a component during a high-temperature coating process

Abstract

A covering device (10) for covering at least one region (21) of a component (20) during a high-temperature coating process, the covering device (10) being placed essentially form-fittingly on the component (20) during the high-temperature coating process to prevent the at least one region covered by the covering device from being coated. The elements of the covering device (10) placed essentially form-fittingly on the component (20) are fabricated of a high temperature-resistant plastic which is dimensionally stable during the high-temperature coating process.

Claims

1. A covering device comprising: a high-temperature-resistant plastic placed form-fittingly on a component, the high-temperature-resistant plastic being selected from the group consisting of laminate materials of resin-bonded glass fabric, laminate materials of silicone resin-impregnated mica paper, homogeneously pressed fiber cement materials, and laminated mica paper impregnated with heat-resistant binding agents, and further including high-temperature-resistant fibers, the high-temperature-resistant plastic being dimensionally stable at a temperature above 220° C. at the component during the high-temperature coating process; the covering device configured to cover at least one region of the component during a high-temperature coating process, the covering device being placed form-fittingly on the component during the high-temperature coating process to prevent the at least one region covered by the covering device from being coated, and configured so a form of the covering device is that of a covered component surface in a border region bordering a covered region of the component not to be coated, so that coating material is not able to reach into the covered region, and the high-temperature-resistant fibers are configured to absorb forces caused by internal material stresses or external influences and distribute the forces and thus counteract a deformation of the covering device.

2. The covering device as recited in claim 1, wherein the high-temperature-resistant plastic is dimensionally stable at a temperature of above 400° C. at the component or mask during the high-temperature coating process.

3. The covering device as recited in claim 2, wherein the high-temperature-resistant plastic is dimensionally stable at a temperature of above 500° C. at the component or mask during the high-temperature coating process.

4. The covering device as recited in claim 3, wherein the high-temperature-resistant plastic is dimensionally stable at a temperature of above 600° C. at the component or mask during the high-temperature coating process.

5. The covering device as recited in claim 4, wherein the high-temperature-resistant plastic is dimensionally stable at a temperature of above 700° C. at the component or mask during the high-temperature coating process.

6. The covering device as recited in claim 1, wherein the high-temperature-resistant plastic is dimensionally stable at a temperature up to 10000 C at the component or mask during the high-temperature coating process.

7. The covering device as recited in claim 1, wherein the high-temperature coating is selected from the group consisting of flame spraying, plasma spraying, arc spraying, vacuum plasma spraying and detonation spraying.

8. The covering device as recited in claim 1, wherein the high-temperature-resistant plastic is machinable.

9. The covering device as recited in claim 1, wherein the high-temperature-resistant plastic is selected to be solely the laminated mica paper impregnated with heat-resistant binding agents, the laminated mica paper impregnated with heat-resistant binding agents being laminated with a high-temperature nonwoven fabric having the high-temperature-resistant fibers.

10. The covering device as recited in claim 1, wherein the high-temperature-resistant plastic has a lower hardness than the component.

11. A method for high-temperature coating of a component where a temperature is above 220° C. at the component during the high-temperature coating, comprising: covering at least one region of the component during the high-temperature coating with the covering device as recited in claim 1.

12. The method as recited in claim 11, wherein the temperature during application of the high-temperature coating is above 400° C. at the component.

13. The method as recited in claim 12, wherein the temperature during application of the high-temperature coating is above 500° C. at the component.

14. The method as recited in claim 13, wherein the temperature during application of the high-temperature coating is above 600° C. at the component.

15. The method as recited in claim 14, wherein the temperature during application of the high-temperature coating is above 700° C. at the component.

16. The method as recited in claim 11, wherein the temperature during application of the high-temperature coating is less than or equal to 1000° C. at the component.

17. The method as recited in claim 11, wherein the high-temperature coating process used is selected from the group consisting of flame spraying, plasma spraying, arc spraying, vacuum plasma spraying and detonation spraying.

18. A covered component comprising: at least one region covered by the covering device as recited in claim 1.

19. The covered component as recited in claim 18, wherein the high-temperature-resistant plastic has a lower hardness than the component.

20. The covered component as recited in claim 18, further comprising a coating region outside the at least one region.

Description

BRIEF DESCRIPTION OF THE DRAWINGS

(1) Other features, advantages and possible applications of the present invention are derived from the following description with reference to the figure. In the drawing,

(2) FIG. 1 schematically shows a known covering device for covering a region of a component during a coating process; and

(3) FIG. 2 schematically shows an exemplary specific embodiment of a covering device according to the present invention during a high-temperature coating process.

DETAILED DESCRIPTION

(4) FIG. 1 schematically shows a known covering device 10 for covering a region 21 of a component 20 during a coating process that is implemented at a process temperature of less than 220° C. Covering device 10 thereby has a steel construction 15 which is provided with a silicone element 16. The soft and resilient silicone element 16 fits form-fittingly on component 20. In response to a movement between covering device 10 and component 20, there is no risk of damage to the surface of component 20. During a coating process, which is illustrated in FIG. 1 by two spray cones 31, silicone element 16 of covering device 10 fits form-fittingly on region 21 to be covered and thus prevents region 21 covered by covering device 10 from being coated.

(5) FIG. 2 schematically shows an exemplary specific embodiment of a covering device 10 according to the present invention during a high-temperature coating process that is implemented at a temperature of above 220° C. at the component or mask. Covering device 10 for covering region 21 of component 20 essentially fits form-fittingly on region 21 of component 20 during the high-temperature coating process to prevent coating of covered region 21. The high-temperature coating process is illustrated in FIG. 2 by two spray cones 30.

(6) Covering device 10, which is essentially placed form-fittingly on component 20, is manufactured from a high temperature-resistant plastic that features high temperature-resistant fibers 11 which counteract the forces occurring during the high-temperature coating process at the high prevailing temperatures and thus a deformation of covering device 10. Thus, the high temperature-resistant plastic is dimensionally stable during the high-temperature coating process at the temperature of above 220° C. and reliably covers region 21.

(7) In this specific embodiment, there is no risk of damage to the surface of component 20 in response to a movement between covering device 10 and component 20 since the high temperature-resistant plastic of covering device 10 has a lower hardness than component 20. Covering device 10 illustrated in FIG. 2 is also lower in weight than covering device 10 of FIG. 1, resulting in a better handling property of covering device 10.

LIST OF REFERENCE NUMERALS

(8) 10 covering device 11 high temperature-resistant fibers 15 steel construction 16 silicone element 20 component 21 covered region of the component 30 spray cone (high-temperature coating process) 31 spray cone (coating process)