DE102012106157A1 - Disk element for use in heating device for air heating in motor vehicle, has lamellas arranged one behind other, where two of lamellas comprise planar contact section over which lamellas are attached to another two lamellas - Google Patents

Abstract

The element (1) has lamellas (2, 4, 6, 8) arranged one behind the other, and a lug (32) formed at two of the lamellas and engaged above and/or behind another two lamellas. The former lamellas comprise a planar contact section (9) over which the former lamellas are attached to the latter lamellas. The contact section is arranged perpendicular to connection sections, and the lug is arranged in an area of longitudinal edges (44, 46) of the element, where the element is designed in a meander-shape. The lug is formed as a single-piece with the lamellas and manufactured by a cutting process. An independent claim is also included for a method for manufacturing a disk element.

Description

The invention relates to a lamellar element for a heating device, which is used in particular for air heating in motor vehicles. Furthermore, the invention relates to a method for producing such a fin element.

For use in motor vehicles, especially those with consumption-optimized internal combustion engines, heaters are used for heating the interior and engine. However, such heaters are also suitable for other applications in a wide range of applications, for example in the field of domestic installations (room air conditioning), industrial equipment and the like. Usually heating devices, in particular those with PTC heating elements (positive temperature coefficient, positive temperature coefficient, PTC thermistors), lamellar elements, which are used for heat dissipation. The heat dissipation is supported by an air flow, which is generated by a blower.

There are known heaters in various designs. For example, conventional heaters have fins which are soldered to or mechanically fastened to holding sheets or cover sheets.

However, the production of soldered versions requires a very high effort and is also not reliable, since often not all contact points of the fins are soldered and thus no uniform heat dissipation takes place. As a result, the heating power output of the (PTC) radiator can even be so strongly influenced that the radiator can no longer be operated within the specified specification.

As an alternative to soldered heaters or radiator elements and mechanical fasteners are known as clamp connections. However, these have the disadvantage that the installation of such radiator elements or the radiator is complex and error prone.

From the EP 0 575 649 B1 For example, a radiator element is known which contains heating elements assembled into prefabricated units, which consist of riveted-on sheet metal strips which enclose a lamellar band. The PTC elements used are held in windows or openings of plastic frames. For assembly, the prefabricated heating element units and the plastic frame provided with PTC elements are layered and fixed by means of a holding frame. This design has the disadvantage that the assembly of such a radiator element is expensive.

In the DE 197 06 199 A1 Also, an electric heater is described, are stacked in the PTC elements supporting heating elements with corrugated fins. To secure the position of the corrugated fins between the heating elements serve projections on the sheets that surround the PTC elements. This measure does not lead to an improved assembly.

The EP 0 379 873 A2 describes a device for heating gases using PTC elements which are mounted in a frame, which lies in a U-profile and is covered by a cover plate. The arrangement sit to heat dissipation to the surrounding air frictionally slats, which have a breakthrough for this purpose. Although hereby heating units are created, which heat release lamellae clamped, but such a device can also be expensive to assemble, since the lamellae must be pushed individually. In addition, the arrangement is not very stable and can not be easily layered.

In the EP 1 061 776 A1 a heater is described for air heating, the positioning frame having means for snap-latching of radiator elements and electrode sheets. The frames allow for assembly into radiator assemblies that can be subsequently stacked. The heating elements used are PTC elements. Crimps are used to fasten lamella elements to the radiator panels.

In the EP 1 327 834 B1 a heating device is shown, which has a lamellar element or a corrugated fin element. This has a variety of lamellae interconnected slats. Lamellar arches of one side of the lamellar element are fastened to a radiator panel. Furthermore, the lamellar element is held in its longitudinal direction by the radiator sheet. The radiator plate thus serves to fix the position of the lamellar element, both in its longitudinal and in its transverse direction.

A disadvantage of this solution is that such a lamellar element in an unfixed state has an extremely low rigidity and spring-like effect, which is why a mounting is quite complex. Furthermore, the positional fixing of the lamellar element with the radiator panel is expensive in terms of apparatus.

On the other hand, the object of the invention is to provide a lamellar element which is easy to assemble and / or device-technically simple. Another object of the invention is to provide a simple and To provide cost-effective method for producing such a fin element.

The object is achieved with regard to the lamellar element according to the features of patent claim 1 and with regard to the method according to the features of patent claim 9.

According to the invention, a lamella element, in particular a lamellar element configured in one piece, has a plurality of lamellae arranged one behind the other, in particular in series. At least on a lamella, in particular in one piece, a tab is formed, which laterally over and / or engages behind another lamella, in particular an adjacent lamella. The tab restricts a relative movement of the lamellae operatively connected via the lug to one another. Thus, with the lug, in particular in a direction transverse to the longitudinal direction of the lamellar element, a mechanical rigidity of the lamellar element is increased. As a longitudinal direction, the direction is to be seen approximately transversely to the plane defined by the respective, in particular plate-shaped, slats planes, or the direction in which the slats are arranged one behind the other. Such a lamellar element thus has an overall higher mechanical rigidity than lamella elements without such a lug, whereby the lamellar element can be easily mounted. By the number of tabs and the lugs on the lugs in operative connection slats then a mechanical stiffness of the fin element can be adjusted. Through the tabs, in addition to the rigidity, a more uniform current (in) conduction is realized by the corrugated rib or the fin element. These advantages are reinforced by the fact that the slats according to the invention have contact sections over which each slat rests flat against the at least one adjacent slat.

A gripping behind the tab results in that in addition a relative movement between the lamella having the tab and the lamella engaged behind by the tab is limited in the longitudinal direction of the lamella element. This thus leads to an extension limit of the fin element. The lamellar element according to the invention, in contrast to the prior art, no additional component required - such as the radiator panel in the above-explained EP 1 327 834 B1 - To fix this in the longitudinal direction. The lamellar element according to the invention carries and fixes quasi by the at least one tab by itself, since a relative movement of lamellae in the transverse and / or longitudinal direction is limited. Nevertheless, due to the at least one tab, the lamellar element has a certain flexibility in order, for example, to adapt to surfaces which are not completely flat.

The lamellar element is device technology simply formed by a meander-shaped curved band, which is in particular a metal strip made of an aluminum material. Due to the meander-shaped bending of the band, a plurality or multiplicity of lamellae are formed, wherein in each case two lamellae are connected via a common connection portion of the band, and wherein the planar contact portions are arranged approximately perpendicularly to the connection portions.

In a further embodiment of the invention, each lamella has a tab. A respective tab is preferably formed in the region of a longitudinal edge of a respective lamella. The longitudinal edge of a respective lamella extends in the region between the connecting portions of the respective lamella. A respective two lamella connecting tab is in this case bent over and / or behind the lamella to be joined, wherein the connecting tab is bent together with the tab of the connecting lamella. The two tabs can thus lie substantially on top of each other. Preferably, viewed in the longitudinal direction, at least the superimposed tabs are arranged one behind the other. By bending two superimposed tabs for connecting two slats, for example, each slat can advantageously be configured identically, which reduces the manufacturing outlay.

A lug is preferably provided in the corner region of the respective lamella, whereby in the use of the lamellar element, an air flow flowing through the lamella element is hardly influenced by the lug.

Furthermore, it is conceivable that the tab of a respective lamella is always formed on the longitudinal edge of a same side of the lamellar element, however, the tab could be alternately provided in different corner areas in the slats, whereby all tabs could be used to connect the slats.

Preferably, at least one tab, in particular in the corner area, may be formed in the area of both longitudinal edges of a respective lamella. As a result, relative movements in both directions transverse to the longitudinal direction can be limited by the tabs. When reaching over the tab on the lamella may be present in the normal state of the lamellar element, a distance between the tab and overlapped lamella or the tab is located on the overlapped lamella or its tab. If a distance is selected, then a slight clearance between the lugs on the lugs in operative connection is thus allowed.

It is conceivable that the two tabs of a respective lamella are arranged at the same height or diagonally, ie at different heights, in relation to the lamella. Furthermore, it is conceivable to provide three or four tabs for a respective lamella. In the case of four lugs, two are preferably each formed in the region of a respective longitudinal edge, in particular in the corner regions of the lamella. Tabs of a respective corner region can then preferably be arranged one behind the other. Four tabs lead to an extremely high rigidity of the fin element. Furthermore, in the case of four straps, two straps each of the slat element, in particular the straps at the same height, could be used for over- and / or behind, while the two other straps could be engaged and / or engaged behind by the straps of the adjacent slat element. Thus, if a respective lamella has four tabs, each lamella can be overridden and / or engaged behind by two tabs of an adjacent lamella, except for end-side lamellas, and can engage and / or engage behind each other with another pair of tabs.

In order to produce the lamellar element simply and inexpensively, all tabs of a respective side of the lamellar element are bent in a same direction.

For easy connection of the lamellae, two lamellae can be arranged substantially V-shaped starting from their common connection section. Each two slats thus have an area in which they have an extremely small or no distance to each other. Preferably, these areas are then connected by one or two tabs. Thus, two slats are advantageously connected with their spaced from their common connecting portion via tabs. The two blades are therefore connected from one side via the connecting portion and from the other side via the tabs, resulting in an extremely high rigidity of the fin member.

In a particularly preferred development of the lamella element according to the invention, the tabs are arranged on edges of the abutment sections. The tabs reduce or prevent spacings or insulating oxide layers between the abutment sections.

A respective tab may be formed by two sections extending from a longitudinal edge. A respective tab is thus separated by the cutting sections of the lamella. If two adjacent tabs for connecting two slats are then bent over one another, then the tab for over- and / or behind engagement emerges in the groove of the slat formed by the bending away of the other tab. The immersion of the tab in the groove causes a displacement movement of the tab along the longitudinal edge of the overlapped and / or under-gripped lamella is limited by the walls of the groove. Thus, a displacement movement of lugs operatively connected lamellae in the direction of a top and bottom of the fin element is also limited. By producing the tab over two cuts, the lamellar element can be produced extremely cost-effectively, precisely and essentially without cutting and have narrow dimensions. Separation areas of a respective tab may preferably extend approximately parallel to each other and approximately perpendicular to the longitudinal edge. It would also be conceivable for the separating regions to be V-shaped or angled to the longitudinal edge. Preferably, the separation areas are substantially the same depth.

In a preferred embodiment of the invention, a plurality of fins is provided, wherein the connecting portions then form a top and bottom. At least one of the sides forms a functional area. The functional surface is, for example, an adhesive surface for equipping with PTC elements. Preferably, the connecting portions which form the functional surface each have a radius in the transition region to at least one lamella and, moreover, form an approximately planar plane. Due to the radius, when the functional surface is used as the adhesive surface, excess adhesive may flow or be displaced into the gaps formed by the radii when the lamellar element is fitted with a PTC element.

• – Biegen eines Bands, insbesondere eines Blechbands, zu hintereinander angeordneten Lamellen;
• – Fertigen, insbesondere durch Trennen, insbesondere durch Schneiden, einer oder mehrerer Laschen einer oder mehrerer Lamellen.

An inventive method for producing a lamellar element has the following steps:

• - bending a strip, in particular a metal strip, to successively arranged lamellae;
• - Manufacture, in particular by cutting, in particular by cutting, one or more tabs of one or more slats.

This solution has the advantage that the tabs can be positioned and formed extremely accurately. For example, if the tabs were to be made prior to bending the tape, bending the tape regularly results in an inaccurate and undesirable arrangement of the tabs since material stretching or warping may occur when the tape is bent. A subsequent transfer process of the tabs then runs incorrectly. The production of the tabs after the bending of the strip causes them to be introduced into the lamella element in a defined manner, resulting in a low error rate in the production of the lamella element.

Advantageously, the bent band is loaded in the longitudinal direction prior to manufacturing the tabs, whereby the lamellae are pressed against each other or pressed against each other, which leads to a prefixing of the band or the lamella element. This pre-fixing is very precise control, in particular, a planarity of the upper and lower sides formed by the transition areas remains.

Preferably, during manufacture, the tabs are first cut one at a time and bent partially (e.g., up to about 90 °) before being simultaneously bent (e.g., over a comb) to their final position.

The tabs are preferably produced by cutting, in particular cutting, in particular by cutting. If the tabs are made by a cutting process, this leads to no chip removal.

The tabs can also be bent at the same time during their manufacture, in particular during cutting, in order to over- and / or reach behind the adjacent lamella. Thus, a combined process step "cutting and folding" is provided. Would the tabs are made before bending the tape, so no combined process step would be possible because the tabs would be punched, for example, then the tape would be bent and only then would a bending of the tabs occur. The combined process step thus leads to a fast and cost-effective production process of the lamellar element.

Are two tabs provided when connecting two adjacent lamellae, wherein a first tab is used for over- and / or behind and the other second tab of the first tab over and / or engaged behind, both tabs are made by a cutting tool, said the cutting tool then cuts both tabs substantially simultaneously and bends together. The loading of the lamellar element is effected by the cutting and Umlegevorgang substantially preferred manner in the longitudinal direction of the fin element, whereby a Planizität the top and bottom of the fin element is hardly affected.

The lamellar element produced by the method according to the invention thus has a high planicity, in particular its top and bottom, on, has a high rigidity and is easy to further process or assemble.

In the production of the tab, this is preferably in a first direction, in particular in the longitudinal direction, cut and bent and subsequently bent in a second direction, in particular transversely to the longitudinal edge and / or transversely to the longitudinal direction, for engaging further. Are two tabs provided when connecting two adjacent slats, wherein the first tab is used for over- and / or behind and the other second tab of the first tab over and / or behind, so both tabs are cut together in the first direction and bent and then bent together in the second direction.

It has proven to be advantageous if the slats to be connected via a respective tab are pressed against each other at least in the region of the tab during cutting, as a result of which the slats mutually support each other.

Furthermore, it is extremely advantageous if at least two rows of tabs on different sides of the lamellar element are manufactured substantially simultaneously, since manufacturing forces, in particular when bending the tabs approximately transversely to the longitudinal direction, act against each other and thus bearing forces of the lamellar element during manufacture are extremely low ,

Other advantageous developments of the invention are the subject of further subclaims.

In the following, preferred embodiments of the invention are explained in more detail with reference to schematic drawings. Show it:

1 in a perspective view of an inventive slat element according to a first embodiment;

2 in a perspective view of the invention lamella element together with PTC elements according to a second embodiment;

3 in a perspective view of the lamellar element 2 together with a further fin element; and

4 to 9 in different representations, process steps for the production of the lamellar element according to the invention.

A lamellar element 1 according to 1 is used for a heater for air heating, wherein the heater can be used in particular for heating an interior and / or a combustion or electric motor of a motor vehicle. The heater has in this case, for example, PTC heating elements. The lamellar element then serves to dissipate heat from the PTC heating elements and to supply this heat to an air flow passing through and around the lamella element.

The lamellar element 1 has a multiplicity of lamellae arranged one behind the other, with the following for the sake of simplicity describing the lamellar element 1 only on the after in the 1 first lamella arranged one behind the other lamellas 2 to 8th Reference is made. The lamellar element 1 is meander-shaped, whereby in each case two adjacent lamellae 2 to 8th via a connecting section 10 . 12 . 14 . 16 are connected, wherein in the 1 for simplicity, only the connecting portions of the slats 2 to 8th is provided with a reference numeral. About the connection section 10 is the slat 2 with the in the 1 connected to the first left lamella. A respective lamella 2 to 8th , with the exception of the first and last lamella, is thus alternately over in the 1 upper connecting section 10 respectively. 14 with a first adjacent fin and over the lower connective portion 12 respectively. 16 connected to a second adjacent lamella. The in the 1 upper connecting sections 10 . 14 make a top 18 of the lamellar element 1 and the lower connecting portions 12 . 16 a bottom 20 ,

An embodiment of the connecting portions of the slat element 1 will be described below with reference to the upper connecting section 14 explained. This one has an outer one of the slats 2 to 8th pointing away substantially planar, rectangular outer surface 22 , Starting from this outer surface 22 the connection section extends 14 arcuate to the over the connecting portion 14 connected slats 4 and 6 with a respective arch surface 24 respectively. 26 , The connecting section 14 thus has in the transition region to the associated with this lamellas 4 and 6 seen in cross section a radius.

The outer surfaces 22 all upper connecting sections ( 10 . 14 ) of the fin element 1 form a substantially planar upper functional surface at the top 18 and the outer surfaces 22 all lower connecting sections ( 12 . 16 ) a substantially planar lower functional surface at the bottom 20 from, wherein the functional surfaces, for example, for connecting the fin element 1 serve with PTC elements, which is explained in more detail below.

From a respective connection section 10 to 16 - except in the 1 Right and last connection section - each extend two fins 2 to 8th V-shaped away, with a respective lamella 2 to 8th is slightly S-shaped in cross section. Thus, two slats each 2 to 8th via a respective connecting section 10 to 16 interconnected and lie through the approximately V-shaped arrangement with a spaced from its connecting portion contact portion 28 respectively. 30 (of which the better representability only two are provided with a reference numeral) substantially to each other. According to the invention, two adjacent lamellae 2 to 8th then in the area of their contact sections 28 . 30 via an integral with the lamellar element 1 trained tab 32 firmly connected to each other (the better representation is half in the 1 only one tab 32 provided with a reference numeral. Neighboring lamellae 2 to 8th Thus, on the one hand, via their connecting section 10 to 16 together and on the other hand over the tab 32 interconnected, whereby the lamellar element 1 has an extremely high rigidity.

A respective lamella 2 to 8th points in their corner areas 36 to 42 at the in the 1 left first lamella 34 are provided with a reference numeral, a tab 32 on. Two tabs each 32 are here at a respective lamella 2 to 8th in the region of their respective longitudinal edge 44 and 46 educated. The long edges 44 and 46 a respective lamella 2 to 8th extend approximately transversely to the longitudinal direction between the top and bottom 18 . 20 of the lamellar element 1 , The tabs 32 a respective corner area 36 to 42 the slats 2 to 8th are in the longitudinal direction of the fin element 1 seen in series one behind the other. Two tabs each 32 a respective lamella 2 to 8th are approximately at the same height on the different longitudinal edges 44 and 46 of the lamellar element 1 educated.

A respective tab 32 gets through two cuts 48 and 50 educated. A respective cut 48 and 50 extends from the longitudinal edge 44 respectively. 46 approximately perpendicular to this in the respective lamella 2 to 8th into it. The depth of the cuts 48 and 50 is essentially the same here. The cuts 48 and 50 a respective tab 32 thus extend substantially parallel to each other.

For connecting two slats 2 to 8th become the immediately adjacent tabs 32 the corner areas 36 to 42 the slats 2 to 8th bent together. The joining of lamellas will be described below with reference to FIG 51 and 53 in the 1 provided lamella explained. A flap of the lamella 51 is here by the reference numeral 52 provided adjacent to the in the 1 with the reference number 32 provided flap of the lamella 53 is arranged. For connecting the directly adjacent lamellae 51 and 53 will be the tab 32 the slat 53 around slat 51 along with its tab 52 bent. The tab 52 is thus from its adjacent longitudinal edge 44 bent away, creating a groove 54 is formed by the tab 32 is interspersed. Because the tab 32 together with the tab 52 bent, has the tab 32 a relatively large bending radius, resulting in low stresses in the tab 32 leads. A break of the tab 32 in the production is thus largely avoided. The connection of the other slats of the slat element 1 with the tabs is done accordingly.

By connecting the slats 2 to 8th with the tabs 32 becomes a relative movement of these slats 2 to 8th to each other in a direction approximately parallel and approximately transverse to the longitudinal edges 44 and 46 avoided. Furthermore, the grasping behind the tabs 32 to that a Auszugsweg of the lamellar element 1 is limited in the longitudinal direction.

Due to the V-shaped arrangement of the slats 2 to 8th is between two adjacent lamellae 2 to 8th one an approximately triangular cross-section trained air duct 56 educated.

The upper tabs in the 1 first lamella 34 are inoperative and could be removed.

The tabs 32 . 52 are elongate (eg approximately rectangular) shaped, with their shorter side transverse to the flow direction of an air flow through the lamellar element 1 is arranged. The tabs 32 . 52 are thus extremely narrow, giving a flow resistance of the lamellar element 1 minimized by flowing airflow.

2 shows a second embodiment of a fin element according to the invention 58 , This is much longer than the lamellar element 1 out 1 , In addition, PTC elements serving as heat sources 60 shown.

The PTC elements 60 are configured substantially cuboid and have a width which is about a width of the fin element 58 equivalent. The length of the PTC elements 60 out 2 is chosen so that in this illustration four consecutive pieces in series on the top 18 of the lamellar element 58 can be arranged. The PTC elements 60 are preferably on the top 18 glued. By the of the arch surfaces 24 . 26 the connecting sections 14 limited space (see also 1 ), may be an excess adhesive for bonding the fin element 58 with the PTC elements 60 be displaced there. Thus occurs when gluing the PTC elements 60 essentially no more glue laterally from the lamellar element 58 , ie in a direction transverse to the longitudinal direction, out. Furthermore, such a thin adhesive film is made possible, which serves the function of the unit.

In the 3 is the lamellar element 58 out 2 together with the PTC elements 60 shown, wherein another lamellar element 62 with its bottom 20 with the PTC elements 60 is glued. These are thus between the lamellar element 58 and 60 arranged.

The following is an example of a manufacturing method of the fin element 1 based on 4 to 9 explained.

As a crude product for the production of the lamellar element 1 serves according to 4 a metal band 102 , which consists for example of aluminum or an aluminum alloy. The metal band 102 may be part of a coil, not shown.

According to 5 becomes the metal band 102 out 4 by a suitable forming machine to the fin element 1 meandering curved, with the individual slats 2 to 8th are arranged approximately parallel to each other.

To create the V-shaped arrangement of the slats of the fin element 1 out 5 this is in a holding form 104 according to 6 used in which the lamellar element 1 one-sidedly supported in the longitudinal direction and with its in 6 right lamella on the holding mold 104 can support. The lamellar element is then moved from its in 6 left lamella ago with a forming force 106 acted upon in the longitudinal direction, whereby the lamellar element 1 is compressed. By compression, the slats are arranged V-shaped to each other.

The lamellar element 1 out 6 is in a next step by comparatively easy bending with the abutment sections 9 and by cutting and bending with the tabs 32 . 52 (see. 1 ) Mistake. For this purpose, the lamellar element 1 be led to a (not shown) tool and held there. After that, dive in accordance with 7 for cutting the tabs 32 . 52 one row a corresponding plurality of teeth 96 a holding element 70 and a corresponding plurality of teeth 108 a plate-like cutting tool or cutting element 88 in the lamellar element 1 one. This is in 7 by way of example in the area of the underside 20 of the lamellar element 1 at the in 1 visible longitudinal edge 44 shown.

7 shows an outbreak of a longitudinal section through the cutting element 88 That together with an outbreak of the retaining element 70 and an outbreak of a longitudinal section of the laminar element 1 is shown. The teeth of the cutting element 88 have a depth and a width (seen in the longitudinal direction), which is the depth and width of the teeth 96 of the holding element 70 does not exceed. The teeth 108 of the cutting element 88 in this case, they taper in a direction towards the lamellar element 1 or in the immersion direction. Thus have the teeth 108 two V-shaped cutting edges or tooth flanks 110 and 112 , The teeth 96 of the holding element 70 are at their to the lamellar element 1 pointing edges with a chamfer 116 provided, making this easier in the lamellar element 1 can dive.

According to 7 is a width of the spaces 98 between the teeth 96 of the holding element 70 - In the longitudinal direction of the fin element 1 considered - wider than twice the width or thickness of a lamella 2 , Thus, in each case two to be joined slats, of which in the 7 to 9 exemplary two with the reference numerals 2 and 118 are provided, with play in a respective space 98 plunge.

In the method step according to 7 are the teeth 108 of the cutting element 88 on the teeth 96 of the holding element 70 and are thus still of the slats 2 spaced. In this case, the holding elements 70 together with the cutting elements 88 in sections laterally in the lamellar element 1 method, wherein to be connected slats 2 . 118 of the lamellar element 1 in the interdental spaces 98 plunge.

In a next process step according to 8th in which the same view as in 7 shown are the tabs 32 . 52 in each case two slats to be connected 2 . 118 of the lamellar element 1 through the teeth 108 of the cutting element 88 cut and bent at the same time. This is the cutting element 88 in the longitudinal direction relative to the holding element 70 according to the arrow (in 8th to the left). Due to the oblique arrangement of the cutting tooth flank 110 the teeth 108 become the tabs 32 and 52 starting from the longitudinal edge 44 the slat 118 cut here. By the sliding movement of the cutting element 88 in the longitudinal direction of the lamella element 1 Beyond cutting the tabs 32 and 52 the slats to be joined 2 . 118 to a respective tooth seen in the direction of displacement 96 of the holding element 70 pressed. The teeth 96 have a supporting surface for this purpose 122 of which, for the sake of simplicity, in the 7 only a single one is provided with a reference numeral.

By the method step according to 8th thus become the tabs 32 and 52 cut and approximately at right angles to the slats 2 . 118 bent. The in the 8th upper flap 32 overlaps the lower flap 52 and with it the lamella 118 that with the slat 2 to be connected. The tabs 32 and 52 lie on top of each other.

According to 9 a process step takes place in which the connection of the two slats 2 . 118 over the two tabs 32 . 52 is finished. This is the cutting element 88 moved further in the longitudinal direction, bringing the teeth 108 of the cutting element 88 - seen again in the transverse direction - on the teeth 96 of the holding element 70 lie. However, the teeth are 108 of the cutting element 88 in contrast to the method step according to 7 offset by one tooth with respect to the teeth 96 of the holding element 70 arranged. In a subsequent process step then the holding element 70 together with the cutting element 88 in the direction of the lamellar element 1 shifted, so in a direction transverse to the longitudinal direction. This will grip the teeth 108 of the cutting tool 88 with their tooth flanks 112 on the upper flap 32 and bend them together with the lower flap 52 in the direction of the lamellar element 1 , causing the tab 32 the slat 118 engages behind and the tab 52 between the lamella 118 and the tab 32 is arranged. The tab 52 can after completion of this process step (as in 9 shown) on the lamella 118 lie flat or projecting at an angle ≤ 45 °.

Subsequently, the lamellar element 1 with respect to the tool offset so that this the other rows of tabs in the lamellar element 1 can contribute.

The method steps described form along the lamellar element 1 extending series of connections over two lugs each 32 . 52 , Deviating may also several rows - especially on two each other on the lamellar element 1 opposite rows - are manufactured at the same time.

Furthermore, it is conceivable that the method steps according to 7 to 9 to manufacture in alternative tool concepts, which, however, a similar design of the fin element 1 result. In particular, the method step according to the 7 to 8th with an alternative tool, which only has one tooth 108 has occurred. In this case, the path to be traveled by the tool is along the lamellar element 1 increased. In the process step according to 9 becomes the lamellar element 1 made with two tools, which are used successively. Other alternative tool concepts or modifications of the above-described are possible.

Disclosed is, in particular according to the invention, a lamellar element, in which adjacent Slats are connected in each case via a tab, wherein the tab is in particular formed integrally with the lamella. A respective tab is produced by a separation method, in particular by a cutting method, wherein the respective tab is preferably cut and bent in a combined method step.

LIST OF REFERENCE NUMBERS

1

 lamella element

2

 lamella

4

 lamella

6

 lamella

8th

 lamella

9

 contact section

10

 connecting portion

12

 connecting portion

14

 connecting portion

16

 connecting portion

18

 top

20

 bottom

22

 outer surface

24

 arc face

26

 arc face

28

 Contact section

30

 Contact section

32

 flap

34

 lamella

36

 corner

38

 corner

40

 corner

42

 corner

44

 longitudinal edge

46

 longitudinal edge

48

 cut

50

 cut

51

 lamella

52

 flap

53

 lamella

54

 groove

56

 air duct

60

 PTC element

62

 lamella element

70

 retaining element

88

 cutting element

96

 tooth

98

 gap

102

 metal band

104

 holding mold

106

 forming force

108

 tooth

110

 tooth flank

112

 tooth flank

116

 chamfer

118

 lamella

122

 support surface

QUOTES INCLUDE IN THE DESCRIPTION

This list of the documents listed by the applicant has been generated automatically and is included solely for the better information of the reader. The list is not part of the German patent or utility model application. The DPMA assumes no liability for any errors or omissions.

Cited patent literature

• EP 0575649 B1 [0006]
• DE 19706199 A1 [0007]
• EP 0379873 A2 [0008]
• EP 1061776 A1 [0009]
• EP 1327834 B1 [0010, 0015]

Claims (11)

Slat element with a plurality of slats arranged one behind the other ( 2 to 8th . 118 ) and with one on a lamella ( 4 . 8th ) formed tab ( 32 ), which is an adjacent lamella ( 2 . 6 ) laterally over and / or behind, and wherein the lamella ( 4 . 8th ) at least one planar contact section ( 9 ), over which they at the adjacent lamella ( 2 . 6 ) is present. A lamellar element according to claim 1, characterized by a meander-shaped band ( 102 ) is formed and in each case two slats ( 2 to 8th ) via a common connection section ( 10 to 16 ), and wherein the planar contact sections ( 9 ) approximately perpendicular to the connecting sections ( 10 to 16 ) are arranged. Laminate element according to one of the preceding claims, wherein a tab ( 32 ) on each lamella ( 2 to 8th ) in the region of a longitudinal edge ( 44 . 46 ) of the lamellar element is provided, and wherein a respective two lamellae ( 2 to 8th ) connecting tab ( 32 ) over and / or behind the lamella to be connected ( 2 to 8th ) together with the tab ( 52 ) of the slat to be joined ( 2 to 8th ) is bent. Slat element according to claim 2 or 3, wherein in each case two slats ( 2 to 8th ) with their from their common connecting section ( 10 to 16 ) spaced area over the tab ( 32 ) are connected. Laminate according to one of the preceding claims, wherein the tabs ( 32 . 52 ) at the edges of the plant sections ( 9 ) are arranged. Slat element according to one of the preceding claims, wherein a respective flap ( 32 ) by two from the to the tab ( 32 ) adjacent longitudinal edge ( 44 . 46 ) from extending cuts ( 48 . 50 ) is formed. Laminate according to one of claims 2 to 6, wherein a plurality of fins ( 2 to 8th . 118 ), and the connecting sections ( 10 to 16 ) an upper and a lower side ( 18 . 20 ), wherein at least one of the sides is a functional surface, and wherein at least the functional areas forming the connecting portions ( 10 to 16 ) in each case in the transition region to at least one respective lamella ( 2 to 8th ) a radius ( 24 . 26 ) exhibit. Slat element according to one of the preceding claims, wherein a respective slat ( 2 to 8th ) four tabs ( 32 ), wherein in each case two tabs ( 32 ) for backing and / or reaching over an adjacent lamella ( 2 to 8th ) can be used. Method for producing a lamellar element ( 1 ), in particular according to one of the preceding claims, comprising the steps of: - bending a band 102 to successively arranged lamellae ( 2 to 8th ); - manufacture, in particular cutting, one or more flaps ( 32 . 52 ) one or more fins ( 2 to 8th ). The method of claim 9, wherein after bending the tape ( 102 ) and before making the tabs ( 32 . 52 ) the curved band ( 102 ) is loaded in the longitudinal direction. A method according to claim 9 or 10, wherein in manufacturing the tabs ( 32 . 52 ) These are first cut nacheineander and partially bent and then bent to their final position.

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