DE102013106306B3 - Method for manufacturing blade for air vent, involves positioning stiffening element between two blade portions, and then blade portions are irreversibly joined together by using ultrasonic welding, bonding or latching element - Google Patents

Abstract

The method involves providing a blade (20) with two blade portions (22,24), where a stiffening element (26) is arranged between the two blade portions. The stiffening element is positioned between the two blade portions manufactured in a preceding manufacturing step, and then the two blade portions are irreversibly joined together by using ultrasonic welding, bonding or a latching element. An independent claim is included for a blade for an air vent.

Description

The present invention relates to a method for producing a lamella for an air vent and a lamella for an air vent, wherein the lamella consists of at least two fin parts and a stiffening element arranged between the at least two fin parts. Stiffening elements, in particular for horizontally extending lamellae with a certain length, are known from the prior art. In order to provide such lamellae with a stiffening element, the stiffening element is usually encapsulated with a plastic for producing the lamella or molded onto the stiffening element plastic to form a lamella.

DE 20 2006 014 287 U1 discloses a lamella for an air nozzle, which is made as a composite component of a support structure and an at least partially surrounding the support structure enclosure. Both the support structure and the enclosure are made of plastic, wherein the support structure made of a high-strength plastic and the enclosure are made of a contrast softer plastic. The support structure is at DE 20 2006 014 287 U1 molded with a plastic.

DE 20 2006 004 052 U1 discloses a blade for a horizontal and / or vertical blade assembly on a housing of an air nozzle, wherein a stiffening metallic insert is overmolded with a plastic to produce such a blade.

DE 20 2004 008 181 U1 discloses a blade made of plastic for an existing plastic lamellar grid of a ventilation nozzle. To produce a lamella, a lamella body forming a main element is produced in a first operation by spraying a plastic into which a strip of a plastic material to be galvanized is injected in a second operation.

Further disclosed DE 10 2004 053 720 A1 an attachable element for motor vehicle ventilation nozzles, wherein a detachable element is attached to a lamella, which offers an individual appearance of motor vehicle ventilation nozzles.

DE 10 2009 010 950 A1 discloses a blade for a ventilation nozzle of a vehicle having a base body on which at least one bearing element is arranged, wherein the blade has a first plastic component and a second plastic component. The second plastic component is a solid plastic. For producing the lamella, it is specified to manufacture the lamella as a multicomponent injection-molded part, wherein the bearing element has a cross section which comprises an inlying core of the second plastic component, the core extending substantially over the entire length of the bearing element and being enveloped by a cladding layer, which consists of the first plastic component.

The encapsulation of inserts or stiffening elements for the production of lamellae, which are much more resistant to a deflection, however, has disadvantages. The overmolding of inserts, for example, in a two-component injection molding (overmolding), requires that the insert must be supported during encapsulation. Without supporting the insert, the position of the insert in the finished slat would differ significantly from the planned or desired position. However, since only slight deviations can be permitted in lamellas, in particular in optical decoration elements, the production in an injection molding process proves to be extremely complicated. For example, the metal support of the DE 20 2006 004 052 U1 Holding pins on and the metal support must survive the lamella at least in part to support.

Object of the present invention is therefore to provide a method for producing a lamella, which is compared to the known from the prior art method easier and therefore less expensive and also offers a great design freedom in the production of lamellae.

According to the invention the object is achieved by a method having the features specified in claim 1 and a blade having the features specified in claim 7.

Advantageous developments of the invention are specified in the dependent claims in detail.

In a method for producing a lamella for an air vent, the lamella consisting of at least two lamellae parts and a stiffening element arranged between the at least two lamellae parts, the stiffening element is positioned between the at least two lamella parts manufactured in an upstream production step, and then the at least two blade parts by means of ultrasonic welding, gluing or irreversibly connected to each other via at least one locking element.

By ultrasonic welding, bonding or bonding by at least one locking element can be dispensed with structures for supporting the connecting element. Another Advantage of the method according to the invention over the prior art is that no overmolding occur in a lamella produced by the process according to the invention, wherein in the prior art by overmolding the risk of over-molding, since the stiffening element or a metal insert of the prior art must be extremely tight tolerated. The tolerance requirements result in the prior art in high costs and in a high committee. However, in contrast to the prior art, the method according to the invention makes it possible to introduce the stiffening element precisely in position and to provide a simple, fast and cost-effective method.

At least one of the at least two plate parts may have a receptacle into which at least partially the stiffening element is inserted. By inserting the stiffening element in a receptacle, the stiffening element is prepositioned. Subsequently, only at least two leaf parts need to be brought together and connected to each other.

A first sipe part of the at least two sipe parts may be a front sipe part of a sipe and a second sipe part of the at least two sipe parts may form a rear sipe part of the sipe, or a first sipe part of the at least two sipe parts may be an upper sipe part of a sipe and a second sipe part of at least two Slat parts can form a lower slat part of the slat.

In addition, at least one further lamella part can be arranged between at least two lamella parts before the lamella parts are connected to one another. With appropriate design of the plate parts and the stiffening element hereby different optical configurations of a blade can be achieved. For example, between a first and a second fin part a plurality of further thin-layer fin parts can be arranged, which cause a certain visual appearance in the finished fin.

Furthermore, the at least two lamella parts can be adhesively bonded or joined together by means of ultrasonic welding via their contact surfaces on which the at least two lamella parts lie in the assembled state. The contact surfaces may, for example, represent a large area of the two lamella parts or even be single points at which the two lamella parts abut each other.

In addition, the at least two sipe parts may have been produced in an injection molding process. An injection molding process in this case allows the production of a large number of fin parts, which can be dispensed with complex positioning or support steps or devices due to the subsequent connection of the fin parts with the stiffening element in another process.

In a blade according to the invention for an air vent, consisting of at least two fin parts and a stiffening element arranged between the two at least two fin parts, the at least two fin parts are irreversibly connected to one another by means of ultrasonic welding, gluing or at least one latching element.

The advantages stated with regard to the method for producing such a lamella also apply to the finished lamella. This concerns in particular the design options with regard to the finished lamella and the method for producing the lamella, thereby also resulting in significantly lower costs for a finished lamella. In contrast, lamellae with special optical appearances from the prior art are relatively expensive. By contrast, a lamella according to the invention can have a multiplicity of optical appearances, but without resulting in relatively high additional costs. The first fin part, the second fin part and further fin parts can be assembled, for example, modular. Thus, different and different colored slats can be made easily and quickly.

Thus, for example, one of the at least two lamella parts have a receptacle in which at least partially the stiffening element is inserted.

In addition, at least one lamella part or the receptacle of at least one lamella part can have at least one connecting element, which abuts in the assembled state of the lamella on a corresponding connecting element of an opposite lamella part or on an opposite lamella part. By way of example, two lamella parts can be connected to one another via the connecting elements, with the connection being able to take place only in the region of the connecting elements and / or on further circumferential edges of the lamella parts, depending on the desired embodiment (for example, connection via ultrasonic welding).

Furthermore, the stiffening element may have at least one opening, an opening and / or at least one structure.

In further embodiments, the receptacle and / or the at least one connecting element can be designed such that they correspond to the structure of the at least one opening and / or the at least one opening of the stiffening element. If the stiffening element is inserted or placed in the receptacle and / or the at least one connecting element, positioning of the stiffening element takes place.

Furthermore, the stiffening element may have pins that protrude from the blade. These pins serve, for example, for pivoting the finished lamella in a fan housing.

The stiffening element may be arranged substantially in the longitudinal direction of the blade between the at least two fin parts. This is used in particular to prevent the deflection of the blade in the inserted state.

The stiffening element can furthermore extend essentially over the entire width and / or length of the lamella. In certain embodiments, the stiffening element is visible from the outside in the case of a manufactured lamella.

In addition, the at least two sipe parts made of plastic and / or the stiffening element may be made of plastic or a metal. If both the lamella parts and the stiffening element are made of plastic, then the same plastic can also be used for all components since no encapsulation takes place as in the prior art. In the prior art, however, it is often necessary that the plastic of the insert has a higher melting point than the overmolded plastic, otherwise the insert or the stiffening element would melt and the resulting blade would be unusable either optical or technical reasons.

The at least two lamella parts may have a different color, surface texture and / or extent in their length, width and / or height. Thus, the at least two blade parts, wherein between the at least two blade parts further blade parts can be arranged, have different colors or even a blade part a defined structure and the other blade part have a smooth surface. For example, in one embodiment where one blade portion is the front blade portion of a blade and another blade portion is the rear blade portion of a blade, the rear blade portion may have a structure causing a turbulent airflow, the leading blade portion having a smooth surface. Thus, in the installed state of the lamella in a Luftausströmer results in a familiar visual appearance, but the outflowing air is desired by the structure of the rear fin part swirled desired.

The stiffening element can, for example, also have fiberglass elements in order to achieve the required bending stiffness of a lamella. Furthermore, aluminum or steel can also be used for the stiffening element, wherein, with regard to the desired optical configuration of the finished lamella, especially if it is designed such that the stiffening element is visible from outside, for example the stiffening element is coated with a galvanizing process can.

Furthermore, it is possible to produce the stiffening element before joining the lamella parts in a so-called MIM (Metal Injection Molding) method. It is also possible to produce the stiffening element by means of extrusion and subsequent possible post-processing. In addition, the stiffening element can also be produced in a zinc die-casting process. In particular, the stiffening element may have a cross-section in the form of a double-T-beam.

Other objects, features, advantages and applications will be apparent from the following description of non-limiting embodiments to be understood with reference to the accompanying drawings. All described and / or illustrated features alone or in any combination form the subject matter disclosed herein, also independent of their grouping in the claims or their relationships. The dimensions and proportions of the components shown in the figures are not necessarily to scale, they may differ from the illustrated in embodiments to be implemented.

In the drawings shows:

1 a cross section through a lamella with stiffening element;

2 a cross-section through a lamella with stiffening element in the region of a connecting element;

3 a first fin part;

4 a stiffening element;

5 a second fin part;

6 another second fin part;

7 a stiffening element having a structure;

8th a stiffening element with openings;

9 a cross section through two leaf parts and a stiffening element;

10 a cross-section of a connected blade with stiffening element;

11 a cross section of a connected blade;

12 a cross section of a connected blade with a plurality of connecting elements;

13 a second fin part with three connecting elements;

14 a further second fin part with three connecting elements;

15 a second fin part with three connecting elements and side openings;

16 a cross section through a plurality of leaf parts and a stiffening element;

17 a cross section through a connected blade with a plurality of fin parts and a stiffening element;

18 a cross section through two leaf parts;

19 a cross section through two leaf parts and a stiffening element; and

20 a cross section through a connected blade.

The 1 to 20 show various embodiments of lamellae, wherein provided with like reference numerals substantially correspond to each other, unless otherwise specified.

1 shows a cross section through a blade 20 with a stiffening element 26 , The slat 20 has a first fin part 22 and second fin part 24 on, between the first fin part 22 and the second fin part 24 a stiffening element 26 is arranged. The stiffening element 26 is designed essentially as a double-T-carrier. The stiffening element 26 is from the outside with a finished lamella 20 visible, noticeable. The stiffening element 26 has a bead 46 on which, for example, pins 44 (please refer 4 ) can be arranged. About the pins 44 the slat can be pivoted in the installed state in an air vent.

At the bead 46 opposite end of the stiffening element 26 is the stiffening element 26 rounded. Furthermore, the stiffening element 26 radii in this area 50 on, wherein the first fin part 22 and the second fin part 24 have corresponding radii. Furthermore, the stiffening element 26 an area 60 on, which in the connected state of the blade 20 from a part of the second fin part 24 is engaged behind.

2 shows a cross section through a blade 20 with stiffening element 26 in the region of a connecting element 36 , The connecting element 36 (or the connecting elements 36 ) extends from the second fin part 24 through an opening 40 of the stiffening element 26 , About the connecting element 36 becomes the first fin part 22 with the second fin part 24 connected. The connection is made via the contact surfaces 34 , where the contact surfaces 34 the surfaces of the first fin part 22 and the second fin part 24 are at which the first fin part 22 with the second fin part 24 is in communication or the first fin part 22 and the second fin part 24 abut each other. Further, the first fin part becomes 22 with the second fin part 24 over the contact surfaces 34 connected with each other. This is done by ultrasonic welding, the welding area 56 the area is where the first fin part 22 and the second fin part 24 over the contact surfaces 34 abut each other.

The opening 40 of the stiffening element 26 also has a circumferential chamfer 48 on. The first lamella part 22 and the second fin part 24 consist of a plastic. As in ultrasonic welding of the first fin part 22 with the second fin part 24 in the welding area 56 or at the contact surfaces 34 the plastic of the first fin part 22 and the plastic of the second fin part 24 at least partially liquefy and therefore can flow, has the opening 40 the chamfer 48 on. Furthermore, there is a certain distance between the connecting element (s) 36 to the wall of the opening 40 of the stiffening element 26 , This also serves to accommodate the possibly flowing or deforming plastic or to make room available for this, without causing deformation or buckling of the first fin part 22 or the second fin part 24 comes.

The 3 to 5 show the components (first lamella part 22 , second fin part 24 and stiffener 26 ) in the 1 and 2 shown lamella.

3 shows here in a perspective view, the first fin part 22 , 4 shows in a perspective view of the stiffening element 26 and 5 shows in a perspective view of the second fin part 24 ,

The stiffening element 26 has the openings described above 40 on which round a chamfer 48 exhibit. Furthermore, the stiffening element 26 an opening 52 into which a positioning pin 54 that on the second fin part 24 is arranged, engages. The first lamella part 22 has analogous to the second fin part 24 also a positioning pin 54 on that in 3 but it is hidden. This also engages at least partially in the opening 52 ,

The bead 46 of the stiffening element 26 has a pin on the outer sides 44 on. About the pins 44 becomes the finished connected lamella 20 rotatably mounted in a ventilation housing of a Luftausströmers.

This in 5 in a perspective view shown second fin part 24 has four fasteners 36 on. The connecting elements 36 are designed to pass through the openings 40 of the stiffening element 26 in the connected state of the lamella 20 pass through and on a lower side of the first fin part 22 issue. The maximum diameter of the connecting element 36 is less in both the longitudinal and in the transverse direction than the width or length of the corresponding openings 40 , Only the positioning pin 54 or the positioning pins 54 have a diameter substantially that of the opening 52 equivalent. Will the stiffening element 26 on the second fin part 24 attached, it results over the or the positioning pin (s) 54 , the opening 52 , as well as the fasteners 36 and the openings 40 a positionally accurate alignment of the components. Subsequently, the first fin part 22 on the stiffening element 26 put on, passing over the radii 50 (please refer 1 and 2 ) Also, an orientation of the first fin part 22 with respect to the stiffening element 26 results.

After the first fin part 22 , the stiffening element 26 and the second fin part 24 positioned to each other and connected to each other, carried out an ultrasonic welding, wherein the structured connecting elements 36 in the contact areas 34 and the contact surfaces 34 of the first fin part 22 merge, what about a permanent connection of the first fin part 22 with the second fin part 24 is reached. The stiffening element 26 is between the first fin part 22 and the second fin part 24 kept free of play.

6 shows a perspective view of another second fin part 24 , This has a recording 28 on. In the recording 28 For example, a stiffening element 26 be used. The recording 28 is here designed so that the stiffening element 26 Partially recorded in it and the recording 28 at least partially survives. Subsequently, a first fin part 22 on the stiffening element 36 and on the second fin part 24 be put on.

For this purpose, the first fin part 22 a corresponding corresponding admission 28 on. Thus, take over the recordings 28 a first fin part 22 and the second fin part 24 a positioning and orientation of the stiffening element 26 ,

7 shows a perspective view of a stiffening element 26 that a structure 42 having. Such a stiffening element 26 For example, in a recording 28 as they are in 6 is shown used. For example, the in 6 shown picture 28 of the second fin part 24 Have elevations or fasteners that the structure 42 of the stiffening element 26 penetrate and are designed according to this.

8th shows in perspective view an alternative embodiment of a stiffening element 26 with a multitude of openings 40 , Through these openings 40 For example, fasteners 36 pass.

9 shows a cross section through two leaf parts 22 . 24 and a stiffening element 26 in a further alternative embodiment. The first lamella part 22 and the second fin part 24 each have a recording 28 on, which for receiving and positioning the stiffening element 26 serve. The connection of the first fin part 22 with the second fin part 24 takes place via the contact surfaces 34 , When ultrasonic welding melts the plastic of the first fin part 22 and the second fin part 24 in the area of contact surfaces 34 and connects them together permanently. About that between the first fin part 22 and the second fin part 24 enclosed stiffening element 26 a lamella made of it receives an increased rigidity and resistance to deflections. This is particularly necessary for horizontally extending fins of a Luftausströmers, often an adjusting means for adjusting the direction of the outflowing air is arranged on a horizontally extending lamella and upon actuation of the Adjustment means via a user a pressure on the horizontally extending blade is exerted with the adjusting means. This results in an increased pressure on this blade, since the adjusting means is usually arranged centrally on a horizontally extending blade.

10 shows a cross section of a connected blade 20 with a stiffening element 26 , The first lamella part 22 and the second fin part 24 each have a recording 28 in which the stiffening element 26 is used. The recording 28 of the second fin part 24 also has a connecting element 36 on. The connecting element 36 is designed so that it in the connected, but not yet ultrasonically welded state of the blade 20 on the surface of the picture 28 of the first fin part 22 is applied. For this purpose, the stiffening element 26 an opening 40 which is substantially formed so that the connecting element 36 can pass through. Unlike the one in 10 shown illustration, the opening 40 however, be so large that there is a space between the circumferential wall of the opening 40 and the connecting element 36 prevails. Furthermore, the opening 40 as in the 1 and 2 shown to have a radius and / or a chamfer. The radius or chamfer or the distance between the opening 40 and the connecting element 36 serve to absorb flowing plastic during ultrasonic welding without the lamella being damaged by the plastic 20 is deformed. The connection of the first fin part 22 with the second fin part 24 takes place via the contact surfaces 34 in the welding areas 56 ,

11 shows a cross section of a connected blade 20 , Unlike the embodiments described above, the cut parts are not shown hatched here. The connection of the first fin part 22 with the second fin part 24 can at the in 11 shown embodiment only in the edge regions of the finished slat 20 respectively. In the embodiments in which the stiffening element 26 circumferentially from the first fin part 22 and / or in the second fin part 24 is surrounded, this is not visible from the outside.

12 shows a cross section of a connected blade 20 with several fasteners 36 , wherein the stiffening element 26 which is between the first fin part 22 and the second fin part 24 is recorded, is visible from the outside.

The stiffening element 26 has a variety of openings 40 on. The second fin part 24 has corresponding connecting elements 36 on, which in the connected, but not yet welded state of the lamella 20 through the openings 40 at the bottom of the first fin part 22 issue. Subsequently, a - ultrasonic welding takes place, wherein over the welding areas 56 the first fin part 22 with the second fin part 24 is connected.

As already stated above, the openings 40 Radii, chamfers and a certain distance to the fasteners 36 exhibit.

13 shows a second fin part 24 with three connecting elements 36 , The connecting elements 36 are in a shot 28 arranged and lie with the peripheral edge of the second fin part 24 in a plane. A corresponding first disk part can this also a recording 28 and correspondingly protruding connecting elements 36 exhibit. Into the recordings 28 Furthermore, a stiffening element is used, which also has openings into which the connecting elements 36 at least partially intervene. Subsequently, an ultrasonic welding, wherein the first fin part 22 and the second fin part 24 both over the circumferential edges of the first fin part 22 and the second fin part 24 as well as over the fasteners 36 be connected to each other.

14 shows a second fin part 24 with three connecting elements 36 , wherein the connecting elements 36 from the recording 28 protrude and the second fin part 24 survive. In the embodiment of the disk parts (first disk part and second disk part 24 ) there are no restrictions. However, in view of the stiffening elements to be used, it is necessary 26 and the design of the lamellae parts are formed so that they have a sufficient contact surface for welded joints for connecting the lamella parts.

15 shows a second fin part 24 with three connecting elements 36 (as in 14 shown) and side openings 58 , Over the side openings 58 for example, pens 44 (as in 4 shown) protrude from a finished blade and be accommodated in a housing for pivoting the blade. For this purpose, a corresponding stiffening element on projecting pins. The openings 58 This can also cause a corresponding orientation of a stiffening element.

16 shows a cross section through several leaf parts 22 . 24 . 30 and 32 and a stiffening element 26 , The first lamella part 22 and the second fin part 24 each have a recording 28 on, from which at least one connecting element 36 in the direction of the opposite lamella 22 . 24 extends. Furthermore, the stiffening element 26 dimensioned so that in a connected state of the lamella 20 (please refer 17 ) Both the first fin part 22 on the further fin part 30 , the more slat part 30 on the further fin part 32 and the further fin part 32 on the second fin part 24 and the first and second fin part 22 . 24 on the surfaces of the stiffening element 26 issue. The connection of the first fin part 22 with the further fin part 30 , as well as the connection of the further fin part 30 with the further fin part 32 , as well as the connection of the further fin part 32 with the second fin part 24 take place via the contact surfaces 34 the corresponding blade parts, wherein the ultrasonic welding at the contact surfaces 34 in the welding areas 56 connect.

17 shows the ingredients 16 in the connected state. In the 16 and 17 Here is only the stiffening element 26 hatched, although a cross section through the lamella 20 is shown.

18 shows a cross section through two leaf parts 22 . 24 , which are not shown hatched. In the above embodiments, the first fin part forms 22 an upper fin part 22 the slat 20 and the second fin part 24 the lower fin part of a lamella 20 , However, as in the 18 to 20 shown a first fin part 22 a front and the second fin part 24 a rear lamella part of a lamella 20 form.

The lamella parts 22 and 24 such as 30 and 32 may be formed differently in their coloring and / or structuring.

In the 18 shown lamellar parts 22 and 24 each have an opening 28 on, wherein in this a stiffening element 26 is used (see 19 ).

After inserting the stiffening element 26 in the recordings 28 become the first fin part 22 and the second fin part 24 moved to each other until the first fin part 22 and the second fin part 24 in their contact areas 34 abut each other.

Subsequently, an ultrasonic welding takes place, wherein the first fin part 22 with the second fin part 24 at the contact surfaces 34 in the welding area 56 connects (see 20 ).

The slats shown in the figure description 20 are much cheaper in their preparation than the slats of the prior art, since for introducing the stiffening element 26 no positioning devices and methods are necessary (for example, special grippers). Furthermore, it is possible to use differently colored and differently structured or coated lamella parts and to connect them simply by means of ultrasonic welding. In the prior art, however, the production of differently colored lamellae is very difficult (for example during encapsulation), since the differently colored plastics would mix, for example, in a two-component injection molding process, thereby producing undesired optical effects.

LIST OF REFERENCE NUMBERS

20

lamella

22

first fin part

24

second lamella part

26

stiffener

28

admission

30

lamellar part

32

lamellar part

34

contact area

36

connecting element

40

opening

42

structure

44

pen

46

bead

48

chamfer

50

radius

52

opening

54

positioning

56

welding area

58

opening

60

Area

Claims (16)

Method for producing a lamella ( 20 ) for an air vent, the slat ( 20 ) of at least two fin parts ( 22 . 24 ) and one between the at least two fin parts ( 22 . 24 ) arranged stiffening element ( 26 ), characterized in that between the at least two laminar parts manufactured in an upstream production step ( 22 . 24 ) the stiffening element ( 26 ) and then the at least two lamella parts ( 22 . 24 ) are irreversibly connected to each other by means of ultrasonic welding, gluing or at least one locking element. Method according to claim 1, wherein at least one of the at least two lamella parts ( 22 ; 24 ) a recording ( 28 ), in which at least partially the stiffening element ( 26 ) is used. The method of claim 1 or 2, wherein the first fin part ( 22 ) and the second fin part ( 24 ), wherein a first Lamella part ( 22 ) of the at least two lamella parts ( 22 ; 24 ) as a front fin part of a fin ( 20 ) and a second fin part ( 24 ) of the at least two lamella parts ( 22 ; 24 ) as a rear slat part of the slat ( 20 ), or a first fin part ( 22 ) of the at least two lamella parts ( 22 ; 24 ) as an upper fin portion of a fin ( 20 ) and a second fin part ( 24 ) of the at least two lamella parts ( 22 ; 24 ) as a lower fin part of the fin ( 20 ). Method according to one of claims 1 to 3, wherein between the at least two fin parts ( 22 . 24 ) at least one further fin part ( 30 ; 32 ) is arranged before the lamella parts ( 22 . 24 . 30 . 32 ). Method according to one of claims 1 to 4, wherein the at least two leaf parts ( 22 . 24 ) via their contact surfaces ( 34 ), to which the at least two lamella parts ( 22 . 24 ) abut one another in the assembled state, glued or joined together by means of ultrasonic welding. Method according to one of claims 1 to 5, wherein the at least two leaf parts ( 22 . 24 ) have been produced in an injection molding process. Slat ( 20 ) for an air vent, comprising at least two fin sections ( 22 . 24 ) and one between the at least two fin parts ( 22 . 24 ) arranged stiffening element ( 26 ), wherein the at least two lamella parts ( 22 . 24 ) are irreversibly connected to each other by means of ultrasonic welding, gluing or at least one latching element. Slat ( 20 ) according to claim 7, wherein at least one of the at least two lamella parts ( 22 . 24 ) a recording ( 28 ), in which at least partially the stiffening element ( 26 ) is used. Slat ( 20 ) according to claim 7 or 8, wherein at least one fin part ( 22 ; 24 ) or the recording ( 28 ) at least one lamella part ( 22 ; 24 ) at least one connecting element ( 36 ), which in the assembled state of the blade ( 20 ) on a corresponding connecting element ( 36 ) of an opposing fin part ( 24 ; 22 ) or on an opposite lamella part ( 24 ; 22 ) is present. Slat ( 20 ) according to one of claims 7 to 9, wherein the stiffening element ( 26 ) at least one opening ( 40 ), a breakthrough and / or a structure ( 42 ) having. Slat ( 20 ) according to one of claims 7 to 10, wherein the receptacle ( 28 ) and / or the at least one connecting element ( 36 ) are designed to match the structure ( 42 ), which has at least one opening ( 40 ) and / or the breakthrough of the stiffening element ( 26 ) correspond. Slat ( 20 ) according to one of claims 7 to 11, wherein the stiffening element ( 26 ) at least one pin ( 44 ), which from the lamella ( 20 protruding). Slat ( 20 ) according to one of claims 7 to 12, wherein the stiffening element ( 26 ) in the longitudinal direction of the lamella ( 20 ) between the at least two fin parts ( 22 . 24 ) is arranged. Slat ( 20 ) according to one of claims 7 to 13, wherein the stiffening element ( 26 ) substantially over the entire width and / or length of the blade ( 20 ). Slat ( 20 ) according to one of claims 7 to 14, wherein the at least two lamella parts ( 22 . 24 ) made of plastic and / or the stiffening element ( 26 ) made of plastic or a metal. Slat ( 20 ) according to one of claims 7 to 15, wherein the at least two lamella parts ( 22 . 24 ) have a different color, surface texture and / or extent in their length, width and / or height.

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