BE1031902A1 - Device for grinding bristle filaments and brush manufacturing device - Google Patents

Abstract

The invention relates to a device (1) for grinding bristle filaments (2), wherein the device (1) comprises a motor-driven grinding surface carrier (3) with a grinding surface (4) and a dust extraction device (5). This device (1) is characterized in that the dust extraction device (5) comprises a suction nozzle (6) assigned to the grinding surface (4), wherein the suction nozzle (6) has a strand holder (7) for an end (8) of a bristle filament strand (9) to be processed and a suction gap (10) which surrounds the strand holder (7) over at least part of its circumference.

Description

Device for grinding bristle filaments and

Brush manufacturing device

The invention relates to a device for grinding

Bristle filaments, in particular ends of the bristle filaments, and a brush manufacturing device comprising such.

Such devices are known, for example, from DE 10 2022 105 091

B1 and are already known in practice in various embodiments and are used, for example, to form free ends of brushes, in particular toothbrushes, in the manufacture of

To round off bristle filaments or to shape them into a specific form.

Bristle filaments already attached to a brush body or bristle filaments before they are attached to a

Brush bodies can be processed with such a device.

When using such devices, in particular in the

Mass production produces a large amount of grinding dust, which

can affect the processing of bristle filaments and the production of brushes.

The object of the invention is to provide a device for grinding

Bristle filaments that actively remove the

Processing of the bristle filaments of grinding dust from a

Work area in which the device is used.

To solve the problem, a device for grinding

Bristle filaments is proposed, which has the means and features of independent claim 1. To achieve the object, a device for grinding bristle filaments is thus proposed, wherein the device comprises a motor-driven

Grinding surface carrier with a grinding surface and a

The device according to the invention is characterized in that the dust extraction device comprises one of the

Grinding surface associated suction nozzle comprising a strand holder for an end of a bristle filament strand to be machined and a

Suction gap which surrounds the strand holder over at least part of its circumference.

The device is equipped with a dust extraction system and its

The suction nozzle assigned to the grinding surface is designed to capture and extract grinding dust where it is generated, namely directly at the

Grinding surface used to process the ends of bristle filaments.

By arranging the suction nozzle on the grinding surface and the

By forming their suction gap, it is possible to reduce the amount of

The sanding dust generated by the bristle filaments should be extracted as effectively and as close to its source as possible. This prevents the dust generated during the processing of the bristle filaments from

Grinding dust inside the device and in the environment in which the

device is set up.

The suction nozzle can be particularly effective if it is positioned opposite the grinding surface. The suction nozzle can be statically mounted on the grinding surface, which rotates during operation of the device.

device and thus be arranged in the immediate vicinity of the grinding surface.

Particularly preferably, the suction gap of the suction nozzle is arranged opposite the grinding surface or on the grinding surface. In particular, if the grinding surface is in a horizontal or approximately horizontal

alignment is used, it may be useful if the

Suction nozzle, especially the suction gap of the suction nozzle, above the

grinding surface is arranged.

The suction gap of the suction nozzle can be one of the grinding surface and/or the

have an inlet opening facing the strand holder.

Inlet opening, the strand intake can be arranged over at least part of the

The circumference of the strand holder is surrounded. A bristle filament strand to be processed can be arranged within the strand holder of the suction nozzle and held in its processing position on the grinding surface.

If the suction gap, especially its inlet opening,

Strand holder and/or the grinding surface, it is possible to effectively capture the grinding dust generated during processing of the free end of the bristle filament strand and to remove it from the

The suction nozzle can be removed from the working area of the device.

In this context, it must be connected not only to a vacuum source but also to a dust collector with which the grinding dust can be removed from the extracted air.

Particularly preferably, the suction gap of the suction nozzle is an annular gap, the inlet opening of which surrounds the strand holder in a ring.

This ensures that the entire strand holder and a bristle filament strand arranged therein are surrounded on all sides by the inlet opening of the suction gap. This promotes a particularly reliable

Extraction of grinding dust from the working area of the device.

The suction gap can have an inlet section that is aligned transversely or perpendicularly to the grinding surface. It is also possible that the

Inlet section of the suction gap with the grinding surface a pointed

angle or is aligned parallel to the grinding surface.

In one embodiment of the device, the suction gap can have a

cross-section that widens in the suction direction. Starting from its inlet cross-section, the suction gap then widens in

Extraction direction in which the grinding dust is extracted from the working area of the

The inlet cross-section can be accessed via this

In this way, a high flow velocity can be generated, which ensures reliable collection and removal of the

Processing of grinding dust from bristle filaments directly on the grinding surface of the device is facilitated.

The adhesion of grinding dust within the suction gap can be at least reduced or even completely avoided if the

The surfaces of the suction nozzle that delimit the suction gap have a surface roughness of Ra 0.01 µm to 12.5 µm. The surface roughness is particularly preferably

Surface roughness of the surfaces bordering the suction gap of the

Suction nozzle Ra equal to 0.8 um to 3.2 um.

In one embodiment of the device, the suction gap has in its

The inlet cross-section has a gap width of 1 mm to 20 mm. The gap width in the inlet cross-section of the suction gap is particularly preferably between 2 mm and 5 mm.

In one embodiment of the device, a distance between

Suction gap and grinding surface between 0.2 mm and 10 mm, especially between 1 mm and 3 mm. The distance between suction gap and

Grinding surface can be determined, for example, by the distance between a

Entry cross-section into the suction gap and the grinding surface must be defined.

Furthermore, the distance between the suction gap and the grinding surface can be adjusted. In this way, it is possible to adjust the distance between the suction gap and

Grinding surface can be changed as required.

In order to adjust the distance between the suction gap and the grinding surface, 5 especially during operation of the device, it is possible that the

Device has a distance adjustment device which is designed to adjust a distance between the suction nozzle and the grinding surface. The distance adjustment device can be used for

Setting a distance between an inlet opening of the

suction gap and the grinding surface.

The distance adjustment device can, in one embodiment of the

The device can also be used during the processing of bristle filaments. This makes it possible to adjust the distance during

processing of bristle filaments. A standstill in the

This eliminates the need for a device to adjust the distance. It also makes it possible to adjust the distance accordingly, for example, to increase or decrease it, in the event of increased sanding dust accumulation or restricted removal.

In a particularly preferred embodiment of the device, the suction nozzle has a nozzle housing in which the suction gap and the

Strand holders are designed.

In one embodiment of the device, the nozzle housing can be manufactured using an additive manufacturing process, in particular 3D printed. This variant of the nozzle housing can thus be formed in one piece. It is also possible for the nozzle housing to be a

outer part and at least one insert part in which the

Strand holder is designed.

The multi-part design of the nozzle housing can be advantageous in order to be able to replace the at least one insert part in which the strand holder is formed, for example in a different, in particular higher-quality,

material than the outer part of the nozzle housing. Furthermore, it is possible to design the at least one insert part, which due to its contact with the bristle filaments to be processed may be subjected to increased

can be subject to wear, as it may come into direct contact with the bristle filaments to be processed, and should be designed to be replaceable.

If at least one insert part is worn, it is possible to

Insert part from the outer part of the nozzle housing and replace it with a new one. Furthermore, it is possible to replace the insert part with another insert part in order to

To convert to processing a different, particularly larger or smaller, bristle filament strand.

In a particularly preferred embodiment of the device, the device has in the outer part of the nozzle housing two with respect to a

Longitudinal center axis of the strand holder axially spaced

At least one of the two insert parts can have or form the previously mentioned strand holder and in particular at least partially within the other

It is also possible that two or more

Insert parts together define the strand holder.

If there are several insert parts, one insert part can be placed between the grinding surface of the device and another insert part, in particular a

Insert part which has the strand holder.

The suction nozzle, especially on its nozzle housing, can have a

Connection piece for connection to a vacuum source of the

device.

In one embodiment of the device, the suction gap can be formed between the outer part and the at least one insert part of the nozzle housing. In a particularly preferred embodiment of the

Device is the suction gap between two arranged in one, for example in the previously mentioned outer part of the suction nozzle

This variant of the device makes it possible to produce surfaces that delimit the suction gap and are formed on the inserts with a certain quality, i.e. with a certain hardness and/or

Surface roughness, in a desired material, which is, for example, particularly wear-resistant, and/or in a specific shape, without the entire suction nozzle, in particular its

to manufacture nozzle housings of this quality. This enables the

To keep the costs of manufacturing the device as low as possible.

The outer part and at least one insert part can be

The design of the device can have the same distance to the grinding surface or different distances to the grinding surface.

Even in an embodiment of the device in which the suction nozzle comprises two insert parts, these can have the same distance to the

grinding surface or different distances to the grinding surface.

The distance between the insert part, which has the strand holder, and the

The grinding surface can, for example, be larger than the distance between the outer part or the other insert part and the grinding surface.

In one embodiment of the device, between the end faces of the

Inserts facing the grinding surface, a distance between

0.5 mm to 10 mm, especially from 1 mm to 4 mm, measurable.

In one embodiment of the device, an insert part, in particular an insert part arranged adjacent to the grinding surface, has a distance of between 0.2 mm and 10 mm, in particular from 1 mm to 3 mm, from the grinding surface. This distance can also be the distance of the

suction gap to the grinding surface. The insert part arranged adjacent to the grinding surface can be one of two insert parts that is arranged closer to the grinding surface than the other insert part.

In one embodiment of the device, this has within the

The filament stop can prevent a bristle filament strand from fanning out within the

Avoid strand pick-up of the device and promote precise processing of the ends of the bristle filaments on the grinding surface.

The filament stop can be arranged or formed, for example, on an insert part having the strand holder. Furthermore, it is advantageous if the filament stop is ring-shaped within the strand holder and/or if a narrowing of the cross section of the

A strand holder is formed in the direction of insertion of a

Bristle filament strand in the strand receptacle upstream section of the

Strand absorption can be compared to the cross section in the

Area of the filament stop have a larger cross-section.

In order to increase the service life of the suction nozzle, it may be advisable to coat an inner circumferential surface of the strand holder, in particular the

The insert part comprising the strand holder is made of steel or ceramic and/or has a hardness of 55 to 63 HRC, preferably 60 to 63 HRC. Particularly preferably, the inner peripheral surface of the strand holder is made of hardened steel, in particular stainless steel.

In this way, the strand holder and its inner circumferential surface are particularly wear-resistant, so that a long service life of the suction nozzle can be achieved. Furthermore, it is possible for the inner circumferential surface of the strand holder to be surface-hardened, in particular with a

Surface hardening depth from 1.2 to 1.8 Rht.

The design of the inner circumferential surface of the strand holder in a

Material of particularly high quality and/or hardness can be advantageous in order to avoid abrasion of the material from which the strand holder is made on the

To avoid bristle filaments.

The device may include a throttle for changing a

insertion cross-section into the strand holder.

The insertion cross-section into the strand holder can be the cross-section through which a bristle filament strand to be processed can be inserted into the strand holder. Using the throttle, it is possible to create a free

Cross-section that occurs when the strand is inserted into the

bristle filament strand still results, and thereby a

Flow velocity of the air when flowing through this free

An increased cross-section in the strand holder.

Flow velocity can prevent grinding dust from escaping via the

Counteract the insertion cross-section from the strand holder.

Before the bristle filament strand is removed from the

When the device's strand holder is removed, the throttle can be opened, thus widening the insertion cross-section into the strand holder. This prevents any grinding dust that may still be adhering to the bristle filament strand from being transferred to the throttle and its components. The throttle can also be used when

Inserting a bristle filament strand into the strand receptacle must be open to facilitate insertion of the bristle filament strand into the strand receptacle and to prevent bristle filaments from kinking.

The throttle can be used to change the insertion cross-section into the

Strand pickup between an initial position and a

It is advantageous to leave the throttle elements in their initial position when a

Bristle filament strand is inserted into the strand holder. During operation of the device, i.e. when the bristle filaments are

Grinding surface is machined, the throttle can be closed, i.e. its

Throttle elements must be arranged in the throttle position. After the

When processing the bristle filament strand, it is advantageous to open the throttle, i.e. to move the throttle elements from their throttle position back to the

starting position and thus the insertion cross-section into the

In this way, contact of the

Throttle elements through the bristle filaments of the processed

Bristle filament strand is avoided when removing the bristle filament strand from the strand holder.

In one embodiment of the device, it has a

Holding device for holding a bristle filament strand in a

It is particularly advantageous if a longitudinal center axis of a receiving cross-section of the

Holding device for a bristle filament strand congruent with a

The longitudinal center axis of the strand holder is

Holding device ensures that the bristle filament strand can be positioned centrally in the strand holder of the device.

To achieve the object, a brush manufacturing device with a device for grinding bristle filaments according to the claimed type is also proposed.

The invention is described in more detail below with reference to exemplary embodiments, but is not limited to the exemplary embodiments shown. Further exemplary embodiments will become apparent from

Combination of the features of one or more protection claims with each other and/or by combination of one or more

Features of the embodiments. They show:

Figure 1 is a perspective view of a device for grinding bristle filaments, the device comprising a motor-driven grinding surface carrier with a grinding surface and a

Dust extraction device comprising a grinding surface associated

Suction nozzle, wherein the suction nozzle has a strand receptacle for an end of a bristle filament strand to be processed and a suction gap which supports the strand receptacle over at least part of its

circumference, here closed ring-shaped.

Figure 2 shows the device shown in Figure 1 in partially broken away

Depiction,

Figure 3 is a sectional side view of the suction nozzle, wherein it can be seen that the suction nozzle has a nozzle housing with an outer part and two insert parts arranged therein, one of which

Insert part forms a strand holder and between the two

Insert parts form a suction gap whose entry section is aligned perpendicular to the grinding surface,

Figure 4 is a sectional side view of a suction nozzle modified in comparison to Figure 3, the suction gap of which has an inlet section aligned approximately parallel to the grinding surface of the grinding surface carrier,

Figure 5 is a sectional side view of another

Design of a suction nozzle, the upper part of which in the illustration

Insert part has an annular filament stop which is arranged within the strand holder of the suction nozzle,

Figure 6 is a sectional view of another embodiment of a suction nozzle having a throttle for reducing a

insertion cross-section into the strand holder,

Figure 7 is a perspective view of the device shown in Figure 6

suction nozzle,

Figure 8 is a plan view of the device shown in Figures 6 and 7

Suction nozzle with throttle elements in the open position,

Figure 9 shows the suction nozzle shown in Figures 6-8 in perspective

View with valves in closed or throttle position

throttle elements on their top and

Figure 10 is a plan view of the suction nozzle shown in Figure 9.

All figures show at least parts of a device for grinding bristle filaments 2, designated as a whole by 1. The

Device 1 has a motor-driven grinding surface carrier 3 with a grinding surface 4 and a dust extraction device 5.

The dust extraction device 5 has a grinding surface 4 associated

Suction nozzle 6, wherein the suction nozzle 6 has a strand holder 7 for an end 8 of a bristle filament strand 9 to be processed and a

Suction gap 10, which connects the strand holder 7 via at least one

Part of its circumference, in the example shown over the entire

The circumference is closed and surrounds the ring.

The figures illustrate that the suction gap 10 is an annular gap whose

Inlet opening 11 surrounds the strand holder 7 in a closed ring shape.

The suction gap 10 of the embodiments of the

Devices 1 each have an inlet section 12 which, as in

Figure 3, is aligned perpendicular to the grinding surface 4, or which, as shown for example in Figure 4, forms an acute angle with the grinding surface 4 or is even aligned parallel to the grinding surface 4.

In particular, the sectional views of the suction nozzle 6 illustrate that the respective suction gap 10 has a cross-section which is

Suction direction extended.

Surfaces 13 of the suction nozzle 6 delimiting the suction gap 10 have a

Surface roughness Ra between 0.01 µm to 12.5 µm, preferably between 0.8 µm to 3.2 µm.

The suction gap 10 has a gap width B in the inlet cross-section between 1 mm and 20 mm, in particular between 2 mm and 5 mm.

A distance A between the suction gap 10 and the grinding surface 4 is adjustable. The distance can be, for example, between 0.2 mm and 10 mm, in particular between 1 mm and 3 mm.

To change the distance between the suction gap 10 and the

Grinding surface 4, the device 1 has a distance adjustment device 14. The distance adjustment device 14 is designed to adjust the distance between the suction nozzle 10 and the grinding surface 4. In particular, the distance between an inlet opening 11 of the

suction gap 10 and the grinding surface 4 can be changed.

In particular, the sectional views of the suction nozzle 6 show that the

Suction nozzle has a nozzle housing 15 in which the suction gap 6 and the

Strand holder 7 are formed.

Depending on the design of the nozzle housing 15, this can be produced, for example, in one piece and/or in an additive manufacturing process, in particular 3D-printed, or in another

manufacturing process.

The nozzle housing 15 shown in the figures is constructed in several parts and has an outer part 16 and two insert parts 17 and 18.

The upper insert part 17 of the two insert parts 17 and 18 of the

The suction nozzle 6 shown in Figures 3, 4 and 5 has the strand holder 7 and, in the position of use, is surrounded in sections on the outside of the outer part 15 by the lower insert part 18 of the two insert parts 17 and 18 in a ring-shaped manner.

In the embodiment of the suction nozzle 6 shown in Figure 6, the two insert parts 17 and 18 together form the strand holder 7.

The two insert parts 17 and 18 are arranged axially spaced from each other with respect to a longitudinal center axis 34 of the strand holder 7. The annular suction gap 10 of the suction nozzle 6 is thus formed by a

Distance between the two insert parts 17 and 18.

In the embodiment of the suction nozzle 6 shown in Figure 3, the two insert parts 17 and 18 have the same distance A from the grinding surface 4 on the grinding surface carrier 3 of the device 1.

According to the embodiment of Figure 4, the upper insert part

17 of the two insert parts 17 and 18 is arranged so that it has a greater distance to the grinding surface 4 on the grinding surface carrier 3 than the lower insert part 18. Between levels in which the

Grinding surface 4 facing end faces of the insert parts 17 and 18, in this embodiment a distance C of 0.5 mm to 10 mm, preferably a distance C of 1 mm to 4 mm, can be measured.

The other, lower insert part 18 has, depending on the design of the

Suction nozzle 6 has a distance A between 0.2 mm and 10 mm, in particular from 1 mm to 3 mm, to the grinding surface 4 on the grinding surface carrier 3.

In the example shown, this distance A also corresponds to the

Distance of the suction gap 10 to the grinding surface 4.

In the embodiment of the suction nozzle 6 shown in Figure 5, this has within the strand holder 7, namely on the upper insert part 17 of the

Nozzle housing 15 has an annular filament stop 21, which leads to a cross-sectional constriction within the strand holder 7. The

Filament stop 21 serves to stop the end 8 of the

bristle filament strand 9 within the strand holder 7 and to avoid damage to bristle filaments 2 during processing.

The inner circumferential surface 22 of the strand holder 7, in particular of the upper insert part 17, which has the strand holder 7, is preferably made of hardened steel, in particular stainless steel, or of

Ceramic. In any case, it is advantageous if the inner circumferential surface 22 is made of a wear-resistant material. This prevents abrasion of the

Material of the inner peripheral surface 22 and contamination of the

Bristle filaments 2 and contamination of the bristle filaments with this abrasion are avoided. Preferably, the inner peripheral surface 22 of the strand holder 7 has a hardness of 55-63 HRC, preferably 60-63 HRC.

The inner circumferential surface 22, which defines the circumference of the strand holder 7, can be surface hardened. This can be done in particular with a

Surface hardening depth from 1.2 to 1.8 Rht.

The inner circumferential surface 22 of the suction nozzle 6, which circumferentially defines the strand holder 7, can have a surface roughness between Ra 0.01 µm and 2.2 µm, in particular between 0.2 µm and 1.6 µm.

Part of the inner peripheral surface 22 of the strand holder 7 can also be provided by a surface of the filament stop 21.

In the embodiment of the suction nozzle 6 shown in Figures 6-10, this has a throttle 23. The throttle 23 is part of the device 1 and serves to change an insertion cross-section 24 of the suction nozzle 6 into the strand holder 7. The throttle 23 has several throttle elements 25 which are used to change the insertion cross-section 24 between a

initial position and a throttle position. The

Throttle elements 25 are shown, for example, in Figure 6, but also in the

Figures 9 and 10 are shown in their throttle position. In this throttle position, the throttle elements 25 reduce the free

Cross-section extending between an edge of the insertion cross-section 24 of the

Strand holder 7 and the inserted into the strand holder 7

Bristle filament strand 9.

Figures 9 and 10 show the throttle elements 25 in their

Throttle position, whereby in the illustration according to Figure 10 it is

outside of the bristle filament strand 9.

In order to remove the bristle filament strand 9 from the strand holder 7 or to insert a bristle filament strand 9 into the strand holder 7, the throttle elements 25 can be moved from their throttle position shown in Figures 9 and 10 into their initial position or open position according to Figures 7 and 8. In their open position, the throttle elements 25 reduce the insertion cross-section 24 of the

Strand holder 7 is not, so that a bristle filament strand 9 with its end 8 freed from a sheath 26 without damaging the

Bristle filaments 2 due to the certain excess of the

Insertion cross-section 24 of the strand holder 7 in relation to a

Outer diameter of the bristle filament strand 9 securely into the

Strand holder 7 can be inserted.

Figures 1 and 2 show that the device 1 also has a

Holding device 27 for a bristle filament strand 9. By means of the

Holding device 27, a bristle filament strand 9 can be attached to the

Device 1 can be arranged so that its end 8 is in the

Strand holder 7 of the suction nozzle 6 is positioned.

For this purpose, a receiving cross-section 33 of the holding device 27 for a bristle filament strand 9 has a longitudinal central axis 32 which is congruent with a longitudinal central axis 34 of the strand receptacle 7 of the

Suction nozzle 6 is.

The dust extraction device 5 of the device 1 has below the

Grinding surface 4 and below the grinding surface support 3 a

Suction cup 29. The suction cup 29 is connected to a vacuum source 20 of the device 1 via a suction line 30.

In order to set the grinding surface carrier 3 and the grinding surface 4 formed thereon in rotation, the device 1 has a rotary drive 31.

Furthermore, a plurality of projections 35 are formed on the grinding surface 4, which support the action of the grinding surface 4, the

Bristle filaments 2 are correctly aligned for processing on the grinding surface 4 and/or a detachment of grinding dust from the

Bristle filaments 2 can be beneficial during their processing.

The device 1 is part of a device designated as a whole by 28

Brush manufacturing device.

List of reference symbols 1 Device 2 Bristle filaments 3 Grinding surface support 4 Grinding surface 5 Dust extraction device 6 Suction nozzle 7 Strand holder 8 End of 9 9 Bristle filament strand 10 Suction gap 11 Inlet opening of 10 12 Inlet section 10 13 Surfaces of 10 14 Distance adjustment device 15 Nozzle housing 16 Outer part 17 Upper insert part 18 Lower insert part 19 Connection piece 20 Vacuum source 21 Filament stop 22 Inner circumferential surface of 7 23 Throttle 24 Inlet cross section of 7 25 Throttle element 26 Sheathing of 9 27 Holding device for 9 28 Brush production device 29 — Suction pot

30 — Suction line 31 Rotary drive 32 Longitudinal center axis of 33 33 Mounting cross section of 27 34 Longitudinal center axis of 7 35 Projection on 4

A distance between 10 and 4

B Width of 10 in 11

C Distance between levels in which end faces of 17 and 18 are arranged

Claims (24)

Claims 1. Device (1) for grinding bristle filaments (2), the device (1) comprising a motor-driven grinding surface carrier (3) with a grinding surface (4) and a dust extraction device (5), characterized in that the dust extraction device (5) comprises a suction nozzle (6) assigned to the grinding surface (4), the suction nozzle (6) having a strand holder (7) for an end (8) of a bristle filament strand (9) to be machined and a suction gap (10) which surrounds the strand holder (7) over at least part of its circumference. 2. Device (1) according to the preceding claim, wherein the suction nozzle (6), in particular the suction gap (6), is arranged opposite the grinding surface (4), in particular above the grinding surface (4), and/or wherein the suction gap (6) has an inlet opening (11) facing the grinding surface (4) and/or the strand holder (7). 3. Device (1) according to one of the preceding claims, wherein the suction gap (10) is an annular gap, the inlet opening (11) of which surrounds the strand receptacle (7) in a ring shape. 4. Device (1) according to one of the preceding claims, wherein the suction gap (10) has an inlet section (12) which is aligned transversely or perpendicularly to the grinding surface (4) or which forms an acute angle with the grinding surface (4) or is aligned parallel to the grinding surface (4). 5. Device (1) according to one of the preceding claims, wherein the suction gap (10) has a cross-section which widens in the suction direction. 6. Device (1) according to one of the preceding claims, wherein surfaces (13) of the suction nozzle (10) delimiting the suction gap (10) have a surface roughness of Ra 0.01 µm to 12.5 µm, in particular of 0.8 µm to 3.2 µm. 7. Device (1) according to one of the preceding claims, wherein the suction gap () has a gap width of 1 mm to 20 mm, in particular of 2 mm to 5 mm, in its inlet cross-section. 8. Device (1) according to one of the preceding claims, wherein a distance between the suction gap (10) and the grinding surface (4) is adjustable and/or is between 0.2 mm and 10 mm, in particular between 1 mm and 3 mm. 9. Device (1) according to one of the preceding claims, wherein the device (1) has a distance adjustment device (14) which is designed to adjust a distance (A) between the suction nozzle (6) and the grinding surface (4), in particular to adjust a distance (A) between an inlet opening (11) of the suction gap (10) and the grinding surface (4). 10. Device (1) according to one of the preceding claims, wherein the suction nozzle (6) has a nozzle housing (15) in which the suction gap (10) and the strand receptacle (7) are formed. 11. Device (1) according to one of the preceding claims, wherein the suction nozzle (6), in particular the nozzle housing (15), is produced in an additive manufacturing process, in particular 3D-printed, and/or wherein the suction nozzle (6), in particular the nozzle housing (15), has an outer part (16) and at least one, preferably replaceable, insert part (17, 18), in particular wherein at least in one Insert part (17,18) the strand holder (7) is formed. 12. Device (1) according to the preceding claim, wherein in the outer part (16) two insert parts (17, 18) are arranged which are axially spaced from one another with respect to a longitudinal central axis (34) of the strand receptacle (7), at least one of which insert parts forms the strand receptacle (7). 13. Device (1) according to one of the preceding claims, wherein the suction nozzle (6), in particular on its nozzle housing (15), has a connecting piece (19) for connection to a vacuum source (20). 14. Device (1) according to one of the preceding claims, wherein the suction gap (10) is formed between an outer part (16) of a nozzle housing (15) and at least one insert part (17, 18) and/or between two insert parts (17, 18) arranged in an outer part (16) of a nozzle housing (15) of the suction nozzle (6). 15. Device (1) according to one of the preceding claims, wherein the outer part (16) and the at least one insert part (17, 18) or two insert parts (17, 18) have the same distance (A) from the grinding surface (4) or different distances from the grinding surface (4), in particular wherein the distance of the insert part (17, 18) which has the strand holder (7) from the grinding surface (4) is greater than the distance of the outer part (16) or the other insert part (18, 17) from the grinding surface (4). 16. Device (1) according to one of claims 11 to 15, wherein a distance (C) of between 0.5 mm and 10 mm, in particular from 1 mm to 4 mm, is measurable between end faces of the insert parts (17, 18) facing the grinding surface (4), and/or wherein the at least one insert part (17, 18) arranged adjacent to the grinding surface (4) has a distance (A) of between 0.2 mm and 10 mm, in particular from 1 mm to 3 mm, from the grinding surface (4). 17. Device (1) according to one of the preceding claims, wherein the device (1) has a preferably annular filament stop (21) within the strand holder (7), in particular on an insert part (17, 18) of the nozzle housing (15). 18. Device (1) according to one of the preceding claims, wherein a surface (22) of the suction nozzle (6), in particular of the insert part (17, 18) which has or defines the strand receptacle (7) on the circumferential side, delimits the strand receptacle (7), consists of, preferably hardened, steel, in particular of stainless steel, or of ceramic and/or has a hardness of 55 - 63 HRC, preferably of 60 - 63 HRC. 19. Device (1) according to one of the preceding claims, wherein an inner circumferential surface (22) circumferentially delimiting the strand holder (7) is surface hardened, in particular with a surface hardening depth of 1.2 to 1.8 Rht. 20. Device (1) according to one of the preceding claims, wherein an inner circumferential surface (22) of the suction nozzle (6) circumferentially delimiting the strand receptacle (7), in particular an inner circumferential surface (22) of the filament stop (21), has a surface roughness between Ra 0.01 µm - 2.24 µm, in particular between 0.2 µm - 1.6 µm. 21. Device (1) according to one of the preceding claims, wherein the device (1) has a throttle (23) for changing an insertion cross-section (24) into the strand receptacle (7). 22. Device (1) according to the preceding claim, wherein the throttle (23) has movable throttle elements (25) for changing the insertion cross-section (24) between an initial position and a throttle position. 23. Device (1) according to one of the preceding claims, wherein the device (1) has a holding device (27) for holding a bristle filament strand (9) in a processing position on the grinding surface (4), in particular wherein a longitudinal central axis (32) of a receiving cross-section (33) of the holding device (27) is congruent with a longitudinal central axis (34) of the strand holder (7) is. 24. Brush manufacturing device (28) with a device (1) according to one of the preceding claims.