EP2377425A1 - Device and method for manufacturing brushes - Google Patents

Abstract

The method involves attaching bristles at a base part (12) in a clumpful manner. The bristles are cut by a heated tool (70), which stays in contact with the bristles to be cut. The bristles are plugged into openings of the base part and are cut by the heated tool. Tool geometry and temperature of the tool are adjusted to brush geometry in such a manner that a bunch (16) of bristles or an adjacent bunch of bristles is welded together by cutting. The tool is arranged at distance from the base part and is displaced transverse to the bristles without a support body during cutting. An independent claim is also included for a device for manufacturing brushes.

Description

The invention relates to a method and an apparatus for producing brushes, with a base part which forms at least a portion of the brush and are fastened to the bristles.

Various methods of making brushes are known. Conventionally, a brush body is provided with an array of holes ("hole pattern") corresponding to the desired arrangement of bristles. Bundles or tufts of bristles are then inserted into the holes of the brush body and anchored therein by means of impressed small metallic anchors or by means of loops.

In an alternative method of making brushes that has become established in just a few years and is referred to as Anchor Free Tufting (AFT), the bristle tufts are attached to a small brush head plate without the use of loops or anchors. and the carrier plate is then inserted into or attached to a brush body or handle. In a variant of the AFT method brush handles are made with a hole pattern that corresponds to the desired tuft pattern. Bristle tufts are then inserted into these holes and attached to the brush handles. The attachment ends of the tufts are then covered with a small plate.

The bristles are in the prior art front (that is, in the direction of the brush surface, which is the working surface of the brush) and / or back circumcised. The trimming is done either before the bristles are attached to the base part or after fixing to the base part. For example, in the prior art, bristles are tufted in tufts from the front side into openings of the base part and / or of a guide part adjacent to the back of the base part in order to project out of the guide part at the rear. A sharp knife is then moved along the guide member to cut off the bristles at the back. The guide member serves as a counter knife and as a support for the moving knife. Overall, this leads to high blade wear.

In addition, bristles are also trimmed on the front side, especially after they have been attached to the base part by anchor plates. This front trimming is used in particular for profiling the brush surface so that the brush surface, for example, receives a toothed profile in side view. This front trimming, which must be done as accurately as possible, is usually done in several stages from coarse to fine. In this case, successively connected profile cutters are used. This applies in particular to very deep cutting profiles.

The object of the invention is to provide a method and a device with which a brush can be produced in a cheaper way.

• Befestigung der Borsten, insbesondere büschelweise, am Basisteil und
• Zuschneiden der Borsten mittels eines beheizten Werkzeugs, wobei das beheizte Werkzeug mit den zu beschneidenden Borsten in Kontakt kommt.

The method according to the invention provides the following steps:

• Fixing the bristles, in particular tufts, on the base part and
• Cutting the bristles by means of a heated tool with the heated tool in contact with the bristles to be trimmed.

The method according to the invention provides for a so-called hot knife which contacts the bristles and separates them solely on account of their heat development or due to the development of heat and the cutting geometry. The bristles may be cut with the heated tool before or after attachment to the base part.

Further, the hot knife may also be used for cutting the bristles or bristle tufts prior to feeding to the base member, eg, generally to cut the bristles out of the brush making apparatus or to cut the stents in a bristle magazine.

However, according to the preferred embodiment, the cutting should be carried out on bristled base parts.

The heated tool works practically wear-free and can be moved with a high cutting speed across the bristles.

The cutting speed in the preferred embodiment is about 1 to 2.5 m / minute.

The temperature of the heated tool in the cutting area is about 500 ° C +/- 70 ° C. The bristles are made of thermoplastic.

According to the preferred embodiment, the heated tool in the cutting area comprises an electrical resistance heater or itself forms an electrical resistance heater.

One way to implement such a tool is to work with a heated wire that cuts the bristles.

The heated wire can in principle have any cross-sectional shape.

The variant which has proved to be an optimized embodiment in experiments consists in the use of a flat wire.

This flat wire is in particular obliquely moved obliquely to the bristles to lead away the cut ends of the trimmed ends.

The bristles can be trimmed with the heated tool prior to attachment to the base part or, as already mentioned, subsequently.

In particular, the bristles before their attachment to the base part of the openings in the base part protrude the back and be trimmed on the back of the base part. This embodiment is particularly advantageous in brushes in which the bristle tufts are first inserted into the openings of the base part and are moved over a profiled pressure part to different degrees in the openings to produce a profiled brush surface.

The tool geometry (in the case of a wire, the wire geometry) and the temperature of the tool are to be matched to the bristle geometry such that bristles, in particular bristles of a tuft, or neighboring bristle tufts are also welded together by the cutting. The trimmed ends become so soft when cutting and stick together. This can Have advantages, for example by the not yet fixed bristles are already fixed in position.

The base part can be aligned during cutting so that the cut bristle ends fall past the bristles. It is to be avoided that the partially soft bristle sections fall on the bristle ends on the base part in order to bond with them. In particular, the cutting process is performed overhead, that is, projecting downwards with the bristle ends to be cut off, or with bristles lying substantially horizontally, so that the cut ends fall laterally along the bristle tufts. In the latter case, the tool is moved vertically along the side of the base part along.

To prevent falling of cut bristle ends onto the bristles of the base, additional measures may be taken, such as blowing with air, aspirating or using mechanical deflectors.

The heated tool can be moved away from the base part and without supporting body when cutting transversely to the bristles. A supporting part, which acts as a counter knife contacted by the knife and absorbs, for example, bristle ends to be circumcised, would be worn away by the tool traveling along it, which can be avoided by the invention.

Especially when profiling the brush surface by trimming the heated tool can be of great advantage. Here, for example, a first cut is performed with the heated tool, and then further trimmed over an unheated cutting tool, so to speak a fine cut performed. That the trimmed bristle ends easily stick together when processed by the hot tool may be advantageous for subsequent trimming since adjacent bristles support the bristle to be cut, which lessens bristles overall and provides a cleaner cut.

The attachment of the bristles or bristle tufts on the base part can be done by means of separate anchor plates, by gluing, welding and / or encapsulation on the base part.

It should be emphasized that the base part having a perforated field can be a separate, in particular flake-shaped part, which is attached to the remaining brush body or can be embedded in the brush body when it is sprayed, or in that the base part is a one-piece, i. is an integral part of the brush body from the beginning and thus represents only a portion of the same. Yet another possibility is that the base part is welded to the rest of the brush body.

The brush body usually comprises a handle and a head portion, wherein in the / on the head portion, the base part is provided.

The device according to the invention for producing a brush, in particular for carrying out the abovementioned method according to the invention, comprises a removal device for bristle tufts or bristles (bristle separating device), a transport device for bristle tufts or bristles to form a base part forming at least part of a brush body and a heated tool for trimming the brush bristles. Again, there must be contact between the tool and the bristles to be trimmed to transfer the heat directly from body to body (tool to bristle).

The device according to the invention can also have a fastening device in which the bristles are fastened, in particular in tufts, to the base part.

To increase the cycle rate, the device according to the invention has a plurality of processing stations, which are traversed successively from the base part. Here, in particular, an index table, generally speaking a ring or a rotating circle with brackets, a circumferential chain with brackets or the like is advantageous.

• - Figuren 1a bis 1h aufeinanderfolgende Schritte des erfindungsgemäßen Verfahrens, die in der erfindungsgemäßen Vorrichtung durchgeführt werden,
• - Figur 2 eine schematische Draufsicht auf eine Station der erfindungsgemäßen Vorrichtung, in der Borstenbüschel einem Magazin entnommen werden,
• - Figur 3 eine perspektivische Ansicht der Station nach Figur 2 mit einigen weggelassenen Teilen,
• - Figur 4 eine vergrößerte Detailansicht von Figur 3,
• - Figur 5 eine Schnittansicht durch die Station nach Figur 3,
• - Figur 6 eine schematische Perspektivansicht einer weiteren Station der erfindungsgemäßen Vorrichtung, bei der Borsten geschnitten werden,
• - Figur 7 eine Detailschnittansicht durch die Station von Figur 6,
• - Figuren 8a bis 8c aufeinanderfolgende Schritte in der Station nach Figur 6 mit einem anderen Messer, - Figur 9 eine schematische Draufsicht auf eine erfindungsgemäße Vorrichtung,
• Figur 10 einen Querschnitt durch eine nach dem erfindungsgemäßen Verfahren hergestellte Bürste gemäß einer weiteren Ausführungsform,
• Figur 11 eine Schnittansicht durch die Bürsten nach der Linie XI-XI in Figur 10, und
• Figuren 12a bis c aufeinanderfolgende Schritte gemäß einer weiteren Ausführungsform des erfindungsgemäßen Verfahrens und der erfindungsgemäßen Vorrichtung .

Further features and advantages of the invention will become apparent from the following description and from the following drawings, to which reference is made. In the drawings show:

• - FIGS. 1a to 1h successive steps of the method according to the invention, which are carried out in the device according to the invention,
• - FIG. 2 a schematic plan view of a station of the device according to the invention in which tufts are removed from a magazine,
• - FIG. 3 a perspective view of the station after FIG. 2 with some omitted parts,
• - FIG. 4 an enlarged detail view of FIG. 3 .
• - FIG. 5 a sectional view through the station after FIG. 3 .
• - FIG. 6 a schematic perspective view of another station of the device according to the invention, are cut in the bristles,
• - FIG. 7 a detailed sectional view through the station of FIG. 6 .
• - FIGS. 8a to 8c successive steps in the station FIG. 6 with another knife, - FIG. 9 a schematic plan view of a device according to the invention,
• FIG. 10 a cross section through a brush produced by the process according to the invention according to a further embodiment,
• FIG. 11 a sectional view through the brush after the line XI-XI in FIG. 10 , and
• FIGS. 12a to c successive steps according to a further embodiment of the method according to the invention and the device according to the invention.

In FIG. 1 Several sequential steps for making brushes, here in the form of toothbrushes, are shown. The brush has a brush body 10 with a brush head, which in the following forms a base part 12. The base part 12 has numerous passage openings 14, which are filled with bristle tufts 16, which are fastened to the base part 12.

In FIG. 1 It can be seen that a transport device 18, which will be explained in more detail below, conveys individual bristle tufts 16, which are pushed by a device from the transport device 18 into the openings 14 from the rear side of the base part 12.

For this purpose, the transport device 18 has a receiving opening 22 which is filled with a bristle tuft 16 and moved to the base part 12. The device 20 comprises a linearly movable plunger 24, which is inserted axially into the receiving opening 22 in order to push the bristle tufts 16 into the opening 14 of the base part 12 aligned with the receiving opening 22. The Base part is moved along two axes and aligned with the opening to be filled 14 on the bristle tufts 16 to be introduced.

As in FIG. 1 a, on the front side of the base part 12 is a device-side guide part 26, preferably in contact with the front side of the base part 12, whose through-holes 28 are aligned with the openings 14 to be populated.

Distanced from the guide member 26 is a stop member 30. The bristle tufts 16 are so deeply into the base member 12 and the guide member 26 from the back of the base member 12, that is, from the back of the brush 10, pushed in that they protrude from the front of the guide member 16 again and abut against the stop member 30.

As soon as all openings 14 to be equipped with bristle tufts 16 are provided, the in FIG. 1b fully populated state reached.

It should be emphasized that, depending on the embodiment of the brush 10, not all openings 14 have to be filled with bristle tufts 16. To enable variations of tufts patterns and other bristle geometries, it is possible to optionally populate different apertures 14 with bristle tufts 16.

In the in Figure 1c shown next method step, the stop member 30 is removed. Instead, a pressure member 32 is moved from the front axially to the bristle tufts 16 upwards, so that it contacts all the bristle tufts 16. The top of the pressure member 32 is profiled to form a complementary brush surface (formed by the front ends of the bristle tufts 16).

By the pressure member 32, the bristle tufts 16 are pressed back up in part and are unevenly back against the base member 12 out.

Optionally, a counterpressure part 36 complementary to the pressure part can be provided on this rear side so that the bristle tufts 16 can be axially fixed between the pressure part 32 and counterpressure part 36 as far as possible without play.

In order to achieve a tolerance compensation due to the different lengths of the individual bristles, it would be conceivable to design one of the pressure parts 32, 36 either elastically or elastically mounted.

Due to the pressure part 32, the front ends of the bristle tufts 16 have an exact alignment with the base part 12.

In the next step, which will be explained more clearly in the following, the bristle tufts 16 projecting from the rear side relative to the base part 12 are cut off ( Figure 1d ), so that the resulting free ends are just above the base part 12.

In the next process step, which could be carried out in the subsequent station, bristle tufts 16 are attached at the back. This attachment is done for example by welding.

One way of welding is in Figure 1e shown in which a hot plate 38 is pressed against the bristle tufts 16. The back ends of the thermoplastic bristles fuse together, preferably to form a continuous layer 40 (see FIG FIG. 1f ). During this fastening operation and also during the preceding cutting operation, the pressure part 32 preferably remains on the bristle tufts 16. The pressure part 32 can now be removed (FIG. Figure 1g ), and then a rear lid part 40 is applied to the back of the base part 12, at least in the region of the ends of the bristle tufts 16 welded together. This cover part 40 may be a prefabricated part. Alternatively, the lid member 40 may also be made by injection molding to the base member 12 or to the brush body. Of course, the aforementioned use of sacrificial structures on the lid or on the brush body can also be used.

During the foregoing process steps, it is preferable (not limiting) for the guide member 26 to be supported on the base member 12 to provide support and sealing.

In the following, individual of the method steps just explained above will be illustrated and described in more detail.

So shows FIG. 2 Further details of a possible embodiment of the station of the device according to the invention, in which the bristle tufts 16 are separated and transported to the base part 12. The device has its own station with a magazine 42, in which a bristle supply 44 is housed.

The bristles are aligned in magazine 42 parallel and ungrouped housed. They are pressed by adapted pressure means in the direction of the transport device 18.

The transport device 18 includes in the present, also not limiting embodiment to be pivoted about a pivot axis 46 to be pivoted removal device 48 with a plate-shaped bundle pickup, in the illustrated embodiment, a so-called circular arc having a receiving opening 50 for a bristle tufts 16. The receiving opening 50 is open on the side facing the brush holder 44 side. If the bundle taker to the right, based on FIG. 2 , is pivoted, the receiving opening 50 comes in contact with the bristle supply 44. Due to the bias of the bristle supply 44 in the direction of this receiving opening 50, so many bristles press into the receiving opening 50, that it is completely filled.

The separation of the bristle tufts 16 thus takes place laterally to the longitudinal extension of the bristles, which in the present case would be perpendicular to the plane of the drawing. When the receiving opening 50 is filled with bristles, it is pivoted clockwise and in the in FIG. 2 shown position moves. A guide plate 52, which conforms to the shape of the plate 48, ensures that no bristles can fall out of the receiving opening 50.

As an alternative to the curved path, which has the transport device 18 in the embodiments, a linear method can also be used.

From the transport device 18, the bristle tufts 16 are pushed directly into the base part 12 directly, without the interposition of a carrier plate or the like. It should be noted that the individual bristle tufts are removed sequentially from the magazine 42 and transported with the tuft picker to their final position before impact. A transfer to subcarrier is avoided here.

However, since the base portion 12 has numerous openings 14 which must be successively filled with bristle tufts 16, the base portion 12 is moved in two directions X, Y. In order to be filled openings 14 are aligned with the receiving opening 50 and the next bristle tufts 16 to be injected.

The corresponding station preferably has a so-called X-Y carriage, on which the base parts 12 can be fastened and moved in one plane. A so-called X-Y carriage is a simple embodiment of a freely programmable industrial robot, here a 2-axis industrial robot.

FIG. 3 shows the magazine 42 with the tuft stock 44 in perspective view. To clarify the entire station several parts have been omitted.

FIG. 3 further shows a bristle tufts 16, which is being pushed by the device 20 into an opening of the base part 12. A holder 54 positions and locks the guide member 26 to an alignment unit, such as an XY carriage, through which alignment of the base member 12 with the receiving aperture 50 occurs.

FIG. 4 shows that the bristle tufts 16 project from the guide member 26 on the front side after being pushed into the openings 14 of the base part 12. However, the bristle tufts 16 are also in front of the base part 12, either directly after the impact or after the start of the pressure part 32.

The loading with the bristle tufts 16 is in FIG. 5 shown in more detail. It can be seen that the bristle tufts 16 accommodated in the transport device 18 are spaced from the rear side of the base part 12 before being inserted into the openings 14. The transport device is spaced from the base part 12 in the region of the openings 14 via a gap 60 with the gap thickness d. This gap 60 is bridged by no guide member or the like.

Also with respect to the remaining base part 12, the transport device 18 is spaced. A corresponding gap D shows the smallest distance between the transport device 18 and the rear side of the base part 12. Optionally, this gap D could also be zero, but the gap 60 is always present.

When the bristle tufts 16 are pushed in, they consequently have to bridge the gap 60 freely.

For easy insertion of the bristle tufts 16, the openings 14 are preferably provided on the back with a flared chamfer 62.

Also can be seen in FIG. 5 in that the base part 12 has a depression 64 in the region of the openings 14 on the rear side. In this recess 64, the lid member 14 is introduced or molded.

The transport device 18 is designed so that during the insertion of the bristles into the openings 14 in the transport device 18 exclusively axial pressure (that is, pressure in the bristle longitudinal direction) is exerted on the bristle tufts 16 to be introduced. That is, the wall around the receiving opening 50 is rigid, no radial clamping force is exerted on the bristles. The only clamping force is achieved by the bias in the bristle supply 44, which is forwarded so to speak in the receiving opening 50 when separating the bristles.

The cutting of the bristle tufts 16 preferably takes place in a separate station of the device according to the invention, preferably by means of a heated tool. Preferably, the cutting region is formed as an electrical resistance heater, i. this area is current-carrying. Of course, it would also be possible to electrically isolate the section through which current flows, at least in the area of contact with the bristles.

FIG. 6 shows an embodiment of such a heated tool 70, which comprises a current-carrying, hot wire. This wire is moved substantially parallel to the back of the base part 12, as close as possible to the base part 12 along and separates the protruding bristle ends. In this case, bristles or neighboring bristle tufts 16 also partially merge with each other.

FIG. 7 shows the effects of heat on not yet cut bristle tufts 16, which merge together. In addition, however, the already separated ends of remaining in the base part 12 bristle tufts 16 merge, which is advantageous for positioning and attachment.

While in the Figures 5 and 6 a substantially circular cross-section wire as a tool 70 is shown in the FIGS. 8a to 8c to see an alternative embodiment with a so-called flat wire. This, also in the longitudinal direction of the current-carrying, heated wire is knife-like obliquely placed to the bristles to be separated. The inclination of the wire is chosen so that its inclined away from the base part inclined surface is inclined in the direction of movement away from the base part. This will be a removal the cut bristle ends are supported away from the base part. In the FIGS. 5 to 8 It can also be seen that the bristle tufts 16 are not laterally supported in the region of their interface. Also, the tool 70 is not supported in the region of the base part 12, so that no wear occurs during cutting. The cutting takes place, so to speak, without support.

The bristle tufts 16 are either laterally only through the base part 12 (see FIGS. 8a to 8c ) or held by the base part 12 and the guide member 26. In the axial direction, the bristle tufts 16 are positioned between the pressure part 32 and the counter-pressure part 36. This positioning should, but not in a limiting sense, be ensured even during cutting.

In order to prevent the severed ends of the bristle tufts 16 from falling onto the base part 12, the cutting is preferably carried out over the head, that is to say with the back side downwards (see, for example, FIG FIG. 8 ) or with at least greatly skewed base part 12. Thus, the severed ends 72 simply fall down.

The fastening of the bristle tufts 16 on the base part 12 takes place, as stated, either by welding and / or by gluing and / or by casting, for example during the production of the cover part 40. The cover part 40 can in particular rear projecting cleaning projections 80 have to form a tongue cleaner. Alternatively, the supplied cover part 40 can be subsequently pressed or glued, even using the aforementioned sacrificial structures.

Not all openings 14 must be closed by a bristle tufts 16. It may, as already mentioned, even one or the other opening 14 remain unfilled. When later gluing or potting or injection molding, the corresponding opening 14 is then closed.

In addition, it is also possible that some openings with an elastomeric profile member 82 are fitted, as exemplified in FIG. 6 is shown. The corresponding opening 14 in the base part 12 corresponds to this one-piece profile part, whose cross section is significantly larger than that of a bristle tufts 16. The profile part 82 can serve as a massage extension for gums or the like. The profile part 82 may either be prefabricated and then mounted in the opening or molded immediately in / at the opening.

In FIG. 9 a device for producing the brush according to the method described above is shown. This device is designed as a tool, for example with a rotating table 100. Preferably, outside of the tool table 100, each bristle tuft 16 is individually moved to the base part 12 (in this case the brush body 10) via the removal device 48 and the transport device 18, wherein previously the brush body 10 is placed on the guide member 26. A magazine with empty guide parts 26 may be present and is not shown here for clarity.

As already mentioned, in the feed station, each individual bristle tuft 16 is stuffed into the associated opening 14 by moving the laterally held guide part 26 in the X and Y directions.

The finished assembled base 12 is then moved to the tool table 100 and attached to this. The rotating tool table 100 transports one or more of the base parts 12 to a station in which Figure 1 c Pressure and counterpressure 32, 36 align the tufts.

Thereafter, the tufts are cut off at the back by means of the tool 70. This cutting can take place in a subsequent station or in the station in which the pressure and counterpressure parts 32, 36 are applied for the first time.

Subsequently, the bristle tufts 16 are fastened on the back, for example under the action of heat.

Finally, the lid part 40 is sprayed on. The finished brushes are removed and stacked, for example. The transport of the guide members 26 into the first station is not explicitly shown.

It should be emphasized in this context that instead of the base part 12 already formed on the brush body 10, it is also possible to use a plate-shaped base part which passes through all the stations before it is fastened to the brush body 10, for example by extrusion coating.

In the embodiment according to FIG. 10 the device mentioned above is slightly modified. Here, a bristle tufts 16 is removed from the magazine 42 and in the base member 12 using an anchor, also called anchor plate 80, fixed in a preferably blind hole-like opening 14. The bristle tufts 16 is U-shaped to two tufts bent. The anchor plate 80 presses or cuts into the wall 82 which defines the opening 14.

In the FIGS. 12a to 12c are sequential process steps for trimming a brush body 10 already completed with bristle tufts 16 shown.

The bristle tufts 16 can either be attached to the base part 12 via anchor plates 80 or else by other methods, for example the AFT method or the aforementioned method. For the sake of simplicity, a flat surface A, formed by the front free ends of the bristles, is present after the placement and fastening of the bristle tufts ( FIG. 12a ).

In a first method step, the hot tool 70 is moved obliquely inwards and outwards in order to cut off bristle ends in one or more work steps and to give the brush a profiled brush surface ( FIG. 12b ). To move the wire, a freely programmable positioning device can be used, by which the wire is moved along an arbitrarily pre-programmable path.

The free bristle ends can easily stick together, at least the bristle ends of a tuft 16. In a subsequent step ( FIG. 12c ), a profile cutter 84 is used to form the already roughly worked with the hot tool 70 structure even finer and make a final cut on the bristles. The profile cutter 84 is an unheated cutting tool.

Preferably, the larger part of the bristles is cut off with the hot tool 70 and only a smaller part with the unheated, cutting cutting tool. Of course, in this embodiment, a kind of device-side guide member may be present on the front side of the base member 12, from which the bristle tufts 16 protrude far enough to be edited and trimmed here without support.

In addition, individual bristles, the elastomeric profile parts 82 or molded profile parts can be cut with the hot tool.

In a subsequent step, the bristle ends could also be rounded or sharpened, if so desired.

The wire used in the invention preferably has a thickness of about 0.2 mm and a width of 2 mm.

Claims (16)

Method for producing brushes by means of a device, wherein the brushes have a base part (12) which forms at least a portion of a brush body (10) and to which bristles are attached, characterized by the following steps: Attach the bristles, in particular tufts, on the base part (12) and Cutting the bristles by means of a heated tool (70), wherein the heated tool (70) comes into contact with the bristles to be cut. A method according to claim 1, characterized in that the heated tool (70) comprises a heated wire which cuts the bristles. A method according to claim 2, characterized in that the wire is a flat wire. A method according to claim 3, characterized in that the flat wire is moved obliquely inclined to the bristles. Method according to one of the preceding claims, characterized in that the bristles are inserted into openings (14) of the base part (12) and then cut with the heated tool (70). Method according to one of the preceding claims, characterized in that the bristles before being attached to the base part (12) are cut with the heated tool (70). Method according to one of the preceding claims, characterized in that the bristles project before their attachment to the base part (12) from the openings (14) in the base part at the back and are trimmed on the back. Method according to one of the preceding claims, characterized in that the tool geometry and the temperature of the tool (70) are adapted to the bristle geometry, that bristles, in particular a bristle tufts (16), or adjacent bristle tufts (16) are welded together by cutting , Method according to one of the preceding claims, characterized in that the base part (12) is aligned during cutting so that the cut bristle ends (72) fall past the bristles. Method according to one of the preceding claims, characterized in that the tool is moved away from the base part (12) and without supporting body when cutting transversely to the bristles. Method according to one of the preceding claims, characterized in that the bristles cut by the heated tool (70) are then cut further over an unheated cutting tool. A method according to claim 11, characterized in that on the heated tool (70) precut a bristle surface and then further trimmed with the unheated cutting tool, in particular a profile cutter (84), to provide a profiled brush surface. Method according to one of the preceding claims, characterized in that the bristles by means of anchor plates (80), by means of gluing, welding or encapsulation on the base part (12) are attached: Apparatus for producing brushes, in particular with a method according to one of the preceding claims, with
a removal device (48) for bristle tufts (16) or bristles,
a transport device (18) for transporting bristle tufts (16) or bristles to a base part (12) forming at least part of the brush body (10), and
a heated tool (70) for cutting bristles. Apparatus according to claim 14, characterized by a fastening station in which the bristles, in particular tufts, are fastened to the base part (12). Apparatus according to claim 14 or 15, characterized in that it comprises a plurality of processing stations, which are passed through successively in the manufacture of the brush.

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