Slot Die and Method for Producing a Component

Abstract

A slot die has a die gap which is formed by a first die surface and a second die surface where the second die surface opposes the first die surface. The die gap extends in a width direction and has a height. At least the first die surface has variable degrees of roughness in the width direction.

Claims

1.-12. (canceled)

13. A slot die, comprising: a die gap which is formed by a first die surface and a second die surface, wherein the second die surface opposes the first die surface, wherein the die gap extends in a width direction and has a height, and wherein at least the first die surface has variable degrees of roughness in the width direction.

14. The slot die according to claim 13, wherein the first die surface is formed in the width direction by a plurality of portions which have variable degrees of roughness and wherein the plurality of portions are configured to be of variable size or width in the width direction.

15. The slot die according to claim 14, wherein the plurality of portions includes at least three portions and wherein a central portion of the at least three portions has a lower degree of roughness than outer portions of the at least three portions.

16. The slot die according to claim 14, further comprising an insert which is disposed so as to be interchangeable, wherein the insert forms the plurality of portions or has the plurality of portions.

17. The slot die according to claim 14, wherein the plurality of portions are segments which are arranged so as to be interchangeable in the slot die or an insert.

18. The slot die according to claim 17, wherein the segments are arrangeable or positionable in a variable manner in the width direction.

19. The slot die according to claim 13, wherein the die gap has a variable height in the width direction.

20. The slot die according to claim 14, wherein the height of the die gap is set via a configuration of the plurality of portions.

21. The slot die as claimed in claim 13, wherein the height of the die gap is greater in a central region of the die gap than at edges of the die gap.

22. The slot die according to claim 13, wherein the second die surface has variable degrees of roughness in the width direction.

23. A method for producing a component, comprising the step of: applying a fluid onto a substrate material by the slot die according to claim 13.

24. The method according to claim 23, wherein the substrate material is a collector foil of an energy storage cell.

Description

BRIEF DESCRIPTION OF THE DRAWINGS

[0025] FIG. 1 shows two schematic sectional views of an embodiment of a slot die;

[0026] FIG. 2 shows a schematic detailed view as outlined in FIG. 1; and

[0027] FIG. 3 shows three further schematic views as outlined in FIG. 2.

DETAILED DESCRIPTION OF THE DRAWINGS

[0028] FIG. 1 shows in the left-hand portion of the image a sectional view of a slot die comprising a first die part 11 and a second die part 12. The slot die is shown in an open position in the left-hand portion of the image. The first die part 11 comprises a supply channel 14 which leads into a distribution channel 16. The slot die is shown in the present case in section transversely to a width direction B. A second die surface 22 and a first die surface 21 can be identified, wherein these die surfaces are configured as a portion which is preferably configured to be interchangeable. The first die surface 21 and the second die surface 22 form a die gap 20 in the closed state of the slot die, see the right-hand portion of the image. This die gap has a height H and a length L which extends in a direction of flow of a coating material (not shown here). A viewing direction of the first die surface 21 is outlined by the reference sign B1. The view is shown schematically in FIG. 2.

[0029] FIG. 2 shows schematically a detail as outlined in FIG. 1 by the reference sign B1. The distribution channel 16 and three portions 30 can be identified. According to one embodiment, for example, the central portion 30 has a different degree of roughness from the outer two portions 30. Thus a variable degree of roughness can be set over the width direction B of the slot die. According to one embodiment, each of the portions 30 is configured individually as a segment and to be interchangeable. Alternatively, the portions 30 can be part of an insert which can be replaced as a whole. The portions 30 can differ, for example, in their thickness or height, whereby a height H of the die gap can be set, see the right-hand portion of the image of FIG. 1.

[0030] FIG. 3 shows schematically various embodiments of a first die surface 21. For orientation, reference is made to the arrow in FIG. 2, see the reference sign B2, which specifies the underlying viewing direction. The first die surface 21 in each case is formed by three portions 30. The direction of flow runs, so to speak, vertically out of the drawing plane, see the viewing direction B2, as outlined in FIG. 2. In the embodiment according to the left-hand portion of the image, the three portions 30 are configured to be of equal height. In the central portion of the image, the central portion 30 is configured to be lower, whereby in the width direction B a die gap of variable height, in particular a stepped hollow profile, is produced. In the present case, the outer portions 30 are configured to be thicker. Alternatively, it might also be possible to use spacer elements. In this case, portions 30 which are of the same configuration could be used, wherein the desired height is set via the number and the height of the installed spacer elements. A further embodiment is shown in the right-hand portion of the image, wherein the die gap is also configured here with a variable height in the width direction B. However, a transition is provided between the outer portions 30 and the inner portion 30. According to a further embodiment, not shown here, a uniform transition can also be provided between the portions in order to provide an entirely stepless height profile. To this end, the portions are preferably not configured to be flat or straight but follow a contour.

LIST OF REFERENCE CHARACTERS

[0031] 11 First die part [0032] 12 Second die part [0033] 14 Supply channel [0034] 16 Distribution channel [0035] 20 Die gap [0036] 21 First die surface [0037] 22 Second die surface [0038] 30 Portion [0039] B Width direction [0040] L Length [0041] H Height [0042] B1,B2 Viewing directions