DE102021006133A1 - Component, method of manufacture and use - Google Patents

Abstract

Multi-layer component (1) comprising a wire mesh layer (2) and a further layer (3), the two layers (2, 3) being arranged overlapping in sections and being connected to one another. The two layers are connected by an adhesive device (4) comprising a duroplast (5). In the method for manufacturing a filter cartridge (1) from a wire mesh layer (2, 3), the wire mesh layer (2) is shaped accordingly until the end sections (9, 10) of the two layers (2, 3) to be connected have a predetermined overlap . An adhesive device (4) is inserted between the two layers (2, 3) and then heated and pressed so that the two layers (2, 3) are sufficiently connected by the adhesive device (4). According to one use, a heat-activatable film (HAF) (7) is used to connect a wire mesh layer (2) to at least one other layer (3). According to a further use, a heat-activatable film (HAF) (7) is used to produce a filter candle (100) from at least one wire mesh layer (2).

Description

The present invention relates to a component which is at least partially multi-layered and comprises at least one wire mesh layer and at least one further layer, the two layers being arranged so as to overlap at least in certain sections and being connected to one another. The present invention also relates to a method for producing such a component and two uses for such components.

filters such as B. Filter cartridges have a wide range of applications. Filter candles made from a wide variety of materials have become known in the prior art. Fabrics made of plastic and/or metal, among other things, can be used here. Depending on the area of application, stainless steel mesh is also used.

In the production of a filter basket or a filter cartridge from a wire mesh layer, this z. B. formed around a shaped body until a desired geometry exists and the ends of the wire mesh are present at least partially overlapping. Then, in the prior art, the two overlapping areas are connected to one another via a weld seam, for example by resistance welding or plasma welding.

The disadvantage here is that oxidation occurs in the weld seam area, which has a negative effect on the corrosion behavior of the filter cartridge. After the welding process, the weld seam must therefore be subjected to a surface treatment. This post-processing can B. pickling, passivation, vacuum annealing and (or mechanical brushing or grinding. Such post-processing steps are sometimes very time-consuming and / or expensive.

It is therefore the object of the present invention to improve the disadvantages described above in the production of filters from wire mesh.

This object is achieved by a component with the features of claim 1, by a method with the features of claim 12, by a use with the features of claim 15 and by a use with the features of claim 17. Preferred developments of the invention are the subject matter the subclaims. Further advantages and features of the present invention result from the general description and the description of the exemplary embodiment.

The component according to the invention, which is at least partially multi-layered, comprises at least one wire mesh layer and at least one further layer, the two layers being arranged in an overlapping manner at least in certain sections and being connected to one another. The connection of the two layers is produced by at least one adhesive device comprising at least one duroplast.

The adhesive device preferably provides an adhesive seam between the layers.

The wire mesh layer is preferably made from metal wires and in particular from stainless steel wires.

The at least partially multi-layer component can be designed in particular as a filter candle, for which purpose in particular at least one wire mesh layer is formed in such a way that two ends of the wire mesh layer overlap, which are then connected to one another. A filter cartridge or the filter cage of a filter cartridge can thus be made available in a cylindrical configuration with an angular, round or another suitable cross section.

A duroplastic is in particular a plastic that can be thermally deformed and has a predetermined strength after curing, with the shape no longer being able to be changed. For example, phenolic plastics or phenolic resins can be provided as the duroplast.

The component according to the invention offers many advantages. A significant advantage is that a stable and reliable connection of a wire mesh layer to at least one other layer can be provided and that post-processing of the connecting seam is not necessary.

If a layer of wire mesh is connected to another layer, for example by welding, oxidation occurs in the area of the weld seam, which has a negative effect on the corrosion behavior of the component, for example a filter cartridge. After the welding process, the weld seam must therefore be subjected to a surface treatment using conventional methods. This is done, for example, by pickling or passivation, and the oxide layer can also be removed by vacuum annealing or by mechanical brushing or grinding.

The use of an adhesive device with a duroplastic eliminates this post-processing, while a sufficiently stable connection is nevertheless available. The processing or the joining of the layers is quicker and easier and therefore also more cost-effective.

The adhesive device preferably comprises at least one elastomer. An elastomer can be provided by nitrile rubber, for example. The combination of a thermoset and an elastomer in an adhesive device offers particularly advantageous properties.

The adhesive device is particularly preferably provided at least by at least one heat-activatable film (HAF) or comprises such a heat-activatable film. Known heat-activatable films, for example from the Tesa® company, contain nitrile rubber and phenolic resin, among other things, and cure very quickly at an appropriate temperature and under a specific pressure. By using a heat-activatable film, a very defined connection between two layers can be provided quickly and easily. The film thickness can be 200 μm, for example. Depending on the configuration, thicker or thinner films can also be used.

In expedient configurations, the adhesive device is provided in the form of a strip between the two layers. A preferably continuous seam can thus be achieved between the two layers, which is in particular homogeneous, tight, flat and chemically resistant and resistant to liquids. Furthermore, after curing, temperatures of, for example, up to about 200° C. can be withstood.

The further layer is preferably a wire mesh layer. In particular, it is possible to simply and reliably connect two wire mesh layers by means of at least one adhesive device.

Particularly preferably, the wire mesh layer and the further layer are provided by end sections of a single wire mesh layer, which are arranged overlapping at least in sections. In such a configuration, for example, a filter cartridge can be formed by forming a filter basket from a layer of wire mesh.

In expedient developments, at least one connecting layer is provided, which is connected to one of the layers with an adhesive device. Such a design can be particularly advantageous when the wire mesh layer or even both mesh layers have such a large mesh size that the contact surface of the mesh layer on the adhesive device or on the heat-activatable film would not be sufficient. Such a connecting layer or intermediate layer provides a sufficient contact surface. Such a connection or intermediate storage can be provided, for example, by a fabric or wire mesh with a sufficiently narrow mesh size or be designed as a solid material, z. B. as sheet metal strips or the like.

In expedient configurations, the wire mesh layer is made of stainless steel, at least in sections. Depending on the configuration, the wire mesh layer can also be made from a different metal and/or a different material, for example a suitable plastic. Blended fabrics can also be used in a sensible and expedient manner, depending on the configuration.

The wire mesh layer preferably comprises weft wires and warp wires, wire diameters between 0.05 mm and 1.50 mm being provided.

In expedient developments, recurring support wires are provided as weft wires and/or warp wires, which have a diameter of between 0.1 mm and 2 mm, preferably between 0.25 mm and 1.5 mm, particularly preferably between 0.4 mm and 1.25 mm and in particular between 0.4 mm and 0.7 mm. The provision of recurring support wires can provide adequate stability even in the case of fabrics with a very small wire cross-section.

The component is particularly preferably a filter candle. Especially when forming the filter basket of a filter candle, the connection between the overlapping ends of a wire mesh layer can be provided by the adhesive device with a sufficiently durable connection.

The method according to the invention is suitable for producing a filter candle from at least one layer of wire mesh. In this case, a wire mesh layer is preferably formed around at least one core until the ends of the layers to be connected have a predetermined overlap. At least one adhesive device is introduced between the layers. Subsequently, the heating and the pressing of the adhesive device, in particular a heat-activatable film, take place at a predetermined temperature and a predetermined pressure, which brings about a sufficient connection of the two layers by the adhesive device.

Depending on the configuration, the wire mesh is preferably preformed.

Depending on the configuration, the temperature and the pressure are applied to the adhesive device in particular from the outside and/or from the inside through the layers. For example, the core can be heated. The pressure can then from the outside z. B. be applied by means of a stamp, the stamp can also be heated. A type of support mold can preferably be provided around the core and fabric layer during heating and pressing.

The stamp can preferably be driven and/or controlled electrically, hydraulically and/or pneumatically.

In this case, pressure and temperature are advantageously to be selected depending on the adhesive device used. In particular, manufacturer information can be used here in order to be able to guarantee the desired strength of the connection.

The method according to the invention also offers the advantages described above for the component.

The adhesive device is preferably pre-laminated to a layer at a predetermined temperature. The adhesive device or, depending on the configuration, the heat-activatable film is pre-laminated on one layer at such a temperature that the adhesive device does not undergo final curing. Depending on the adhesive device, temperatures between 80° C. and 120° C. can advantageously be used for this purpose.

Depending on the design, the adhesive device can also be pre-laminated on one layer, preferably with an adhesive and/or a double-sided adhesive tape.

At least one connecting layer is particularly preferably arranged between the overlapping layers, which is connected to the layers in each case by means of an adhesive device. At least one connecting layer can be used particularly expediently when the mesh size of the wire mesh layer is too large and otherwise no adequate connection to the adhesive device can be produced.

According to the invention is also the use of a heat-activatable film for connecting a wire mesh layer to at least one other layer.

In particular, the use of an adhesive device with a duroplastic and preferably an elastomer is also inventive.

The use also offers the advantages already mentioned.

The further layer is preferably a wire mesh layer. The two layers can also be end sections of the same wire mesh layer, which are arranged in an overlapping manner at least in sections.

Also according to the invention is the use of a heat-activatable film for producing a filter candle from at least one layer of wire mesh.

Here in particular also the use of an adhesive device with at least one thermoset and preferably at least one elastomer according to the invention.

Further advantages and features of the present invention result from the exemplary embodiment, which is explained below with reference to the accompanying figures.

• 1-3 eine rein schematische Darstellung der Herstellung eines Ausführungsbeispiels eines als Filterkerze ausgebildeten erfindungsgemäßen Bauteils in perspektivischen Ansichten;
• 4 eine rein schematische Darstellung eines weiteren Ausführungsbeispiels eines als Filterkerze ausgebildeten erfindungsgemäßen Bauteils in einer perspektivischen Ansicht;
• 5 eine rein schematische Darstellung der Herstellung eines Ausführungsbeispiels eines als Filterkerze ausgebildeten erfindungsgemäßen Bauteils in einer Herstellungsform in einer perspektivischen Ansicht; und
• 6 eine rein schematische Darstellung eines weiteren Ausführungsbeispiels eines erfindungsgemäßen Bauteils Ansicht von der Seite.

In the figures show:

• 1-3 a purely schematic representation of the production of an embodiment of a designed as a filter candle component according to the invention in perspective views;
• 4 a purely schematic representation of a further embodiment of a designed as a filter candle component according to the invention in a perspective view;
• 5 a purely schematic representation of the production of an embodiment of a designed as a filter candle component according to the invention in a production form in a perspective view; and
• 6 a purely schematic representation of a further exemplary embodiment of a component according to the invention, view from the side.

In 1 a multi-layer component 1 according to the invention is shown purely schematically in a perspective view, the multi-layer component 1 being a filter cartridge 100 in the exemplary embodiment shown here.

In the exemplary embodiment shown, the filter candle 100 is made from a wire mesh layer 2 which is formed into a filter basket 16 with the desired contour or shape. For this purpose, the wire mesh layer 2 is formed into the corresponding contour around a shaped body, for example. The end sections 9 , 10 are arranged so that they overlap at least slightly in order to connect them to form the filter cartridge 100 .

According to the embodiment shown here, both the wire mesh layer 2 and the further layer 3 is provided by the one wire mesh layer 2, whereby in the exemplary embodiment shown here the area of wire mesh layer 2 in the area of end section 9 is regarded as wire mesh layer 2, and wire mesh layer 2 in the area of end section 10 is considered additional layer 3 Are defined. By connecting the two end sections 9, 10, a component 1 that is at least partially multi-layered according to the invention is provided.

In the exemplary embodiment shown here, the wire mesh layer 2 is woven from warp wires 13 and weft wires 14, with a wire mesh layer 2 made of stainless steel 12 being provided here.

In the area of the end section 10 it is indicated purely schematically in the exemplary embodiment shown that the wire mesh layer 2 can have recurring supporting wires 15 as a whole or only in sections in order to increase the stability of the wire mesh layer 2 . It is provided that the wire mesh layer is generally woven from warp wires 13 and weft wires 14, which have a wire diameter of between 0.05 mm and 1.5 mm, for example. In the exemplary embodiment shown here, the support wires 15 can have a thickness of between 0.1 mm and 2 mm, with a thickness of between 0.4 mm and 0.7 mm being particularly advantageous.

It is known from the prior art to connect the two end positions 9, 10, for example, by resistance welding. In order to avoid the time-consuming post-processing of the oxide layer on the weld seam, an adhesive device 4 is provided instead of a weld seam in the exemplary embodiment shown, which is arranged in strips on the end section 10 analogously to the extent of a weld seam. this is in 2 shown purely schematically in a perspective view.

In the exemplary embodiment shown here, the adhesive device 4 comprises a duroplastic 5 , an elastomer 6 also being provided in the adhesive device 4 here. In the exemplary embodiment shown, the adhesive device 4 is provided by a heat-active film (HAF) 7, such as can be purchased from the manufacturer Tesa®, for example.

In particular, phenolic plastics or phenolic resins can be used as duroplastics 5 . Nitrile rubber, for example, can be used as the elastomer 6 . These two components are also contained in commercial heat-activatable films 7, for example.

In the exemplary embodiment shown, the adhesive device 4 is provided pre-laminated on the end section 10 . For this purpose, a temperature of between 80° C. and 120° C. was applied to the adhesive device 4 . It should be noted in particular that such a high temperature is not used as is necessary for the final curing of the thermoset 5 or the heat-activatable film 7 .

In 3 is shown purely schematically how the manufactured filter cartridge 100 looks like. For this purpose, the end section 9 was placed over the end section 10 with the adhesive device 4 arranged thereon, so that the end sections 9, 10 overlap with the adhesive device 4 arranged between them. Subsequently, a predetermined temperature was applied to the adhesive device 4 and a predetermined pressure was applied in order to bring about a sufficiently stable and adhesive connection between the end sections 9, 10. Suitable temperatures and pressures can be provided in particular according to the manufacturer's specifications or can also be determined empirically depending on the application. A glued seam 17 was thus produced, which holds the two layers 2, 3 together

In 4 a further exemplary embodiment of a component 1 according to the invention is shown purely schematically, with a filter cartridge 100 also being formed by a wire mesh layer 2 here. For the sake of clarity, the wire mesh layer is only indicated in places.

Here, too, one can see the overlapping end sections 9, 10, between which an adhesive device 4 comprising a duroplastic 5 is arranged. Here, too, a heat-activatable film 7 is provided as an adhesive device 5, which brings about a sufficiently adhesive connection after a predetermined treatment with a temperature and a pressure.

In 5 is shown purely schematically how the component 1 or a filter cartridge 100 can be produced.

For this purpose, in the exemplary embodiment shown here, a wire mesh layer 2 is formed around a core 201 of a production mold 200 in such a way that the end sections 9, 10 of the wire mesh layer 2 have a corresponding overlap. An adhesive device 4 is then either arranged between the two end sections 9 , 10 or this is already prelaminated on one of the end sections 9 , 10 .

Depending on the configuration, an outer shape 202 can be arranged around the wire mesh layer 2 to guarantee a particularly stable formation of the wire mesh layer 2 in the contour of the later filter candle 100 during the connection of the two end sections 9, 10. This can e.g. For example, a pneumatic or hydraulic clamping device acting on the wire mesh layer from the outside can be provided as the outer mold 202, which fixes the wire mesh layer 2 on the core 201.

In the exemplary embodiment shown, a predetermined pressure is then applied to the future seam with a stamp 203, so that the heat-activatable film 7 is subjected to a predetermined pressure, which, in conjunction with a temperature to be applied, brings about a stable adhesive force.

Here, the stamp 203, designed as a press bar, generates a hydraulically generated pressure for the process on the glued seam from above, precisely positioned.

In the exemplary embodiment shown, it is provided that both the stamp 203 and the core 201 are designed to be heatable, so that optimal heating of the adhesive device 4 is ensured during the pressing process.

In 6 a further exemplary embodiment of an at least partially multilayer component is shown purely schematically.

In the exemplary embodiment shown here, too, a wire mesh layer 2 is connected to a further layer 3 , the further layer 3 being provided here as a further wire mesh layer 8 . The layers of fabric are again made of stainless steel 12 in this embodiment.

In the exemplary embodiment shown, however, the mesh size of the wire mesh layers 2, 8 is so large that the adhesive device 4 cannot achieve sufficient adhesive force. Therefore, a connecting layer 11 is provided here, which enables sufficient adhesive force.

This connecting layer 11 can, for example, be a fabric layer with a sufficiently small mesh size or can also be provided by a solid material, for example a sheet metal strip or a strip made of another suitable material.

The connecting layer 11 is operatively connected to a respective adhesive device 4 which in turn is connected to one of the wire mesh layers 2 , 8 . By providing the connection layer 11, a sufficiently stable connection can be achieved even with wire mesh layers 2, 8 with a large mesh size.

Reference List

1

component

2

wire mesh layer

3

Position

4

gluing device

5

thermoset

6

elastomer

7

heat-activatable film (HAF)

8th

wire mesh layer

9

end section

10

end section

11

connection location

12

stainless steel

13

warp wires

14

weft wires

15

support wire

16

filter basket

17

adhesive seam

100

filter cartridge

200

manufacturing form

201

core

202

outer shape

203

Rubber stamp

Claims (17)

Component (1) which is multi-layered at least in sections and comprises at least one wire mesh layer (2) and at least one further layer (3), the two layers (2, 3) being arranged so as to overlap at least in sections and being connected to one another, characterized in that the connection of the two Layers by at least one adhesive device (4) comprising at least one duroplast (5) is produced. Component (1) after claim 1 , wherein the adhesive device (4) comprises at least one elastomer (6). Component (1) according to the preceding claim, wherein the adhesive device (4) is provided at least by at least one heat-activatable film (HAF) (7). Component (1) according to one of the preceding claims, wherein the adhesive device (4) is provided in strip form between the two layers. Component (1) according to one of the preceding claims, wherein the further layer (3) is a wire mesh layer (2, 8). Component (1) according to the preceding claim, wherein the wire mesh layer (2) and the further layer (3) are end sections (9, 10) of a wire mesh layer (2) which are arranged overlapping at least in sections. Component (1) according to one of the preceding claims, wherein at least one connecting layer (11) is provided, which is connected to one of the layers (2, 3) in each case with an adhesive device (4). Component (1) according to one of the preceding claims, wherein the wire mesh layer (2) is made of stainless steel (12) at least in sections. Component (1) according to one of the preceding claims, wherein the wire mesh layer (3) comprises warp wires (13) and weft wires (14), a wire diameter of between 0.05 mm and 1.50 mm being provided. Component (1) according to one of the preceding claims, wherein recurring support wires (15) are provided as weft wires (14) and/or warp wires (13) which have a diameter between 0.1 mm and 2 mm, preferably between 0.25 mm and 1.5 mm, more preferably between 0.4 mm and 1.25 mm and in particular between 0.4 mm and 0.7 mm. Component (1) according to one of the preceding claims, wherein the component (1) is a filter candle (100). Method for producing a filter cartridge (1) from at least one wire mesh layer (2, 3), characterized by the following steps: - Shaping the wire mesh layer (2, 3) preferably around a core up to the end sections (9, 10) of the two layers to be connected (2,3) have a predetermined overlap; - introducing at least one adhesive device (4) between the two layers (2, 3) - heating and pressing the adhesive device (4), in particular a heat-activatable film (7), with a predetermined temperature and a predetermined pressure, which ensures a sufficient connection of the two Layers (2, 3) effected by the gluing device (4). A method according to the preceding claim, wherein the adhesive means (4) is prelaminated to a sheet at a predetermined temperature. Method according to one of the two preceding claims, wherein at least one connecting layer (11) is arranged between the overlapping layers (2, 3) and is connected to the layers (2, 3) in each case by means of an adhesive device (4). Use of a heat-activatable film (HAF) (7) for connecting a wire mesh layer (2) to at least one other layer (3). Use according to the preceding claim, wherein the further layer (3) is a wire mesh layer (2, 8). Use of a heat-activatable film (HAF) (7) for producing a filter candle (100) from at least one wire mesh layer (2).

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