EP4132324A1

EP4132324A1 - Machine for producing brushes and method for producing brushes

Info

Publication number: EP4132324A1
Application number: EP21716739.4A
Authority: EP
Inventors: Bart Boucherie; Henk Vandenbussche
Original assignee: GB Boucherie NV
Current assignee: GB Boucherie NV
Priority date: 2020-04-08
Filing date: 2021-04-07
Publication date: 2023-02-15
Also published as: DE102020109780A1; TW202203810A; CN115460954A; WO2021204853A1

Abstract

The invention relates to a machine for producing brushes, with a tufting station (18) in which at least one tufting tool (52) is provided, a drilling station (16) in which more drilling tools (50) than there are tufting tools (52) in the tufting station (18) are provided, and a transporting system (11) which has multiple carrier units (12), which carrier units (12) are movable independently of one another and each carry two or more clamping devices (30) for main brush bodies (32) and can be advanced from the drilling station (16) to the tufting station (18). The invention also relates to a method for producing brushes, in particular with a machine according to any one of the preceding claims, wherein the following steps are provided: - in a drilling station (16), in one processing cycle, holes are drilled into multiple main brush bodies (32) by multiple drilling tools (50), - in a tufting station (18), in the same processing cycle, clusters of bristles are introduced one after the other into the holes of multiple main brush bodies (32) by a tufting tool (52).

Description

Brush manufacturing machine and process for manufacturing

to brush

The invention relates to a machine for making brushes and to a method for making brushes.

In the production of brushes, for example toothbrushes, household brushes or paint brushes, it is common for a brush base body to be guided one after the other to different processing stations, at each of which a specific processing step is carried out. For example, a plurality of holes can be drilled into the basic brush body at a processing station, and bundles of bristles are stuffed into the holes at a subsequent work station. To adjust the basic brush bodies, carriages are mostly used, which revolve along a predetermined path in such a way that the bristle bodies temporarily received on them are presented one after the other to the various stations for processing. In a simple example, the brush manufacturing machine has a loading station, a drilling station, a tamping station and a removal station. Then four carriages can be used, which are adjusted one station further with each cycle of the brush manufacturing machine. The carriages are usually attached to a drive element such as a common carrier or a chain, which moves all the carriages further together.

The disadvantage of the known machines is that a certain amount of time passes when the carriages are moved further from one processing station to the next, which has a disadvantageous effect on the productivity of the brush manufacturing machine.

To solve this problem, a brush manufacturing machine is known from DE 102014 103599 A1, which is characterized by very short cycle times and thus high productivity. This known machine is described below with reference to FIGS. 1 and 2. The brush manufacturing machine has a guide block 10, along which a plurality of carriers 12 are circumferentially adjusted by means of a transport system. The carriers 12 are designed here as slides.

A plurality of processing stations 14, 16, 18, 20, 22, 24 are arranged around the guide block 10. When the carriages 12 are adjusted around the guide block 10, they move past the processing stations.

To adjust the carriages 12, a drive device 28 is provided with which each carriage can be moved individually and individually around the guide block 10. The only limitation to the individual maneuverability of the sledges is that no sled can overtake the other. Otherwise, each carriage can be moved individually and independently of the other carriages in terms of travel and travel speed.

The drive device 28 can be formed, for example, by a drive motor on each slide 12, which is coupled to a drive element, for example a drive wheel or a gear wheel, which in turn interacts with a corresponding counter element of the central guide block 10, for example a track or a rack. The drive device 28 can also be designed as a linear motor which is assigned to the carriage and which adjusts it in a contactless manner relative to the guide block 10. The drive device 28 can also be formed by several belt drives with which the carriages can be adjusted individually. Here it is possible, by appropriately assigning the belt drives to the processing stations, to get by with fewer belt drives than there are slides, since it is sufficient for a minimized cycle time to adjust the slides individually and independently of one another only in the area of a few processing stations, for example in the drilling area - and the tamping station, while the carriages can be adjusted synchronously from a removal to a loading station (and thus by means of the same belt drive) without this having a negative impact on the cycle time.

The drive devices mentioned are merely examples and are not an exhaustive list. At least one clamping device 30 for a basic brush body 32 is attached to each carriage 12. In the embodiment shown, two clamping devices 30 are used for each slide. If necessary, more fixtures can be provided.

Each clamping device 30 can be pivoted or tilted about two axes. On the one hand, a pivoting device 36 is provided with which each clamping device 30 can be pivoted about a pivoting axis S. The pivot axis S is aligned parallel to the direction of adjustment of the slide.

Furthermore, a tilting device 38 is provided with which the clamping device 30 can be tilted about a tilting axis K. The tilting axis K is perpendicular to the adjustment direction V of the slide 12.

Furthermore, a height adjustment 40 is provided with which the carrier 34 can be adjusted in the vertical direction relative to the carriage 12, that is, in the direction of the double arrow H.

With regard to the orientation of the brush manufacturing machine, as shown in FIGS. 1 and 2, the height adjustment 40 adjusts the carrier 34 in the vertical direction, that is to say upwards and downwards. The tilting device 38 can tilt the clamping device 30 assigned to it, in relation to FIG. 1, clockwise and counterclockwise about the tilting axis K (see also the double arrow K in FIG. 1). The pivoting device 36 can pivot the clamping device 30 assigned to it, in relation to FIG. 1, clockwise and counterclockwise about the pivot axis S (see also the double arrow S in FIG. 2).

Information such as “above” or the like are to be understood here merely as a reference to the figures. The brush manufacturing machine can later also be arranged differently, since the guide 26 does not have to be located in a horizontally extending plane, as is shown in the drawings.

To adjust the carriage 12 along the guide 26, a control 48, shown schematically here, is provided, which can be freely programmed in the desired manner. Depending on the desired processing steps, the controller 48 controls the speed and steps at which the carriages 12 move along the guide 26. The processing stations can carry out different processing steps. In one example, the processing station 14 can be a loading station in which empty clamping devices 30 are equipped with basic brush bodies 32 to be processed.

The processing station 16 is here a drilling station, which has a drilling tool 50 for each clamping device 30. The drilling tools 50 can be adjusted in a reciprocating movement along the direction of the double arrow B, so that holes are drilled into the brush base body 32. The longitudinal adjustment of the brush base body 32 required here, i.e. along the adjustment direction V of the slide 12 on the guide 26, takes place in that the slide 12 is adjusted in small steps relative to the processing station 16 by means of the drive device 28, namely for each column of holes to be drilled Holes around the hole spacing. In the vertical direction, the brush base bodies 32 are adjusted by means of the height adjustment 40, specifically by the hole spacing for each row of holes to be drilled. If the holes in the brush base body 32 are to be drilled in directions that are not parallel to one another, the brush base body 32 is pivoted and / or tilted in a suitable manner by means of the pivoting device 36 and the tilting device 38.

The processing station 18 is here a tamping station in which each clamping device 30 has a tamping tool 52. With the stuffing tool 52, in a reciprocating motion along the double arrow P, bundles of bristles 60, which are kept ready in a storage box 54, can be stuffed into the holes of the brush base body 32. Here, too, the brush base body 32 is positioned relative to the tamping tool 52 by suitable control of the drive device 28, the height adjustment 40, the pivoting device 36 and the tilting device 38.

The processing station 20 can be a removal station in which the basic brush body 32 provided with bundles of bristles is removed from the clamping device 30 or even just ejected.

Depending on the processing steps to be carried out by means of the Bürstenher manufacturing machine, further processing stations can be used. For example, a post-processing station can be provided in which the bristles 60 attached to the basic brush body 32 cut and / or sanded to obtain a desired length and / or profile. In this case, the removal station 20, viewed in the adjustment direction V, will of course be arranged behind the post-processing station.

The brush manufacturing machine can be coupled to an injection molding station, so that the brush bodies are first injection molded in an adjacent injection molding station or additional parts are molded onto previously produced brush bodies. These brush bodies are then transported manually or preferably fully automatically from the injection molding station to the brush manufacturing machine and coupled into the brush manufacturing machine in the loading station. This can be done in a number of ways. When the carriers do not leave the brush making machine, the brush bodies are inserted into the carriers in the brush making machine. In addition, the carriers could also be used in the loading station in the production machine in the loaded state. In the embodiment shown, however, it is the case that the carriers circulate in the brush manufacturing machine and thus do not leave it.

It is also possible to equip the brush manufacturing machine “twice”, ie a loading station, various processing stations and a removal station in one half, and then a loading station, several processing stations and a removal station in the second half. In this way, the number of brushes produced per cycle can be doubled.

It can be seen that the cycle rate at which the brush body can be drilled and then fitted with bristles depends on the “slowest” of the two stations, drilling and tamping; Since as many holes have to be drilled as have to be tamped per brush body, neither of these two stations can work faster than the other. If it does, it then has to wait until processing at the other station has been completed.

It turns out that drilling the holes is currently the "bottleneck". In view of the fact that the drilling chips have to be removed from the hole and, moreover, the material cannot be processed as quickly as desired (with brush bodies made of plastic this consists of Risk that the material melts), the processing limits have currently been reached with conventional drills and conventional drilling techniques.

The object of the invention is to create a machine and a method for manufacturing brushes with which the processing speed can be increased further.

To solve this problem, a machine for the manufacture of brushes is provided according to the invention, with a tamping station in which at least one tamping tool is provided, a drilling station in which more drilling tools are provided than tamping tools in the tamping station, and a transport system that has several carrier units that independently are movable from one another and each carry two or more clamping devices for brush bodies, which can be further adjusted from the drilling station to the tamping station. To achieve the object, a method for producing brushes is also provided, in particular with such a machine, the following steps being provided: In a drilling station, holes are drilled in several basic brush bodies in a machining cycle with several drilling tools, and in a tamping station Machining cycle with a tamping tool successively introduced bundles of bristles into the holes of several brush bodies.

The invention is based on the basic idea of removing the "bottleneck" in the machining speed by using more drilling tools than tamping tools. If one considers a simple example in which each carrier unit has two clamping devices, one brush base body is completely drilled in one machining cycle with one drilling tool each, while in the same machining cycle two previously drilled brush base bodies, which are accommodated in another carrier unit, are carried out using a single tamping tool Bundles of bristles are provided. Ultimately, the holes (in this example) only have to be drilled half as fast as they are filled with bundles of bristles.

In other words, a drilling rate of the drilling station, which is determined from the number of holes drilled per unit of time multiplied by the number of drilling tools, is greater than or equal to a tamping rate of the tamping station, which is determined from the number of holes tilled per unit of time multiplied by the Number of tamping tools. In this way, all the holes to be drilled in a machining cycle are drilled at the latest when all the holes to be stuffed within the same machining cycle are provided with a bundle of bristles. It is no longer necessary for the tamping tool to wait until all the holes have been drilled in the drilling station, but rather so many drilling tools are used that they are ready in time.

According to a preferred embodiment of the invention, the time period within which all the holes to be drilled in a machining cycle are completed is 90% or less of the time duration of the machining cycle, preferably less than 70% and particularly preferably less than 60%. In general terms, the drilling rate is not equal to the tamping rate, but is noticeably greater than it. As a result, time is available within a processing cycle, which is specified by the tamping station, which can be used to further adjust the carrier unit, which is currently not in the tamping station, before or after drilling. Depending on the “excess” of the drilling rate over the tamping rate, the free time can be used solely to ensure that the corresponding carrier unit only traverses the path from one station to another (i.e. is indexed). However, if the excess is large enough, the excess can also be used to move the corresponding carrier unit to a further station, for example to a post-processing station, which - viewed in an adjustment direction of the transport system - is arranged behind the tamping station, or to a loading station , in which unequipped brush bodies can be fed to the clamping devices and / or stuffed brush bodies can be removed from the clamping devices. The loading station is - seen in the direction of adjustment of the transport system - arranged in front of the drilling station.

Different configurations are possible depending on the number of carrier units used.

If two carrier units are provided, a set of basic brush bodies can be stuffed in the tamping station during a processing cycle, while a further set of basic brush bodies is processed in the drilling station and passes through at least one further station. If three carrier units are provided, it can be provided that one set of brush bodies is stuffed in the tamping station during a processing cycle, while another set of brush bodies is processed in the drilling station and another set of brush bodies passes through at least one further station. This results in more degrees of freedom when machining the brush body.

It can also be provided that the, in turn, further set of basic brush bodies not only pass through one further station, but two further stations. These stations can be, for example, a post-processing station and a charging station.

In the post-processing station, the bristles of the bristle bundles introduced into the bristle base body can be post-processed, in particular cut, ground, rounded off and / or slotted.

In the charging station, brush bodies can be introduced into and / or removed from clamping devices. The removal can take place under the action of gravity, so that the basic brush bodies fall out of the clamping devices when they are opened, or by removing them by machine. The brush body can be inserted by hand or by means of an automated feed device.

Depending on the excess of the tamping rate of the tamping tool over the drilling rate of each individual drilling tool, the number of clamping devices per carrier unit can also be varied. If the stuffing tool is very much faster than the drilling tools, for example three clamping devices per carrier unit (and then for example three drilling tools) can be provided.

The invention is described below with reference to several embodiments, which are shown in the accompanying drawings. In these show.

FIG. 1 shows, in a schematic plan view, a machine for making brushes known from the prior art;

FIG. 2 shows a side view of a drilling station of the machine from FIG. 1; FIG. 3 shows a schematic side view of a machine according to a first embodiment of the invention;

FIG. 4 shows the machine from FIG. 3 in a plan view;

Figure 5 in a schematic, perspective view that

Transport system of the machine of Figure 3;

FIG. 6 shows a plan view of an embodiment variant of the machine from FIG. 3;

FIG. 7 shows, in a schematic side view, a further embodiment variant of the machine from FIG. 3;

FIG. 8 shows a schematic plan view of a machine according to a second embodiment of the invention; and

Figure 9 in a schematic, perspective view that

Transport system of the machine of Figure 8.

In the figures 3 to 5 a machine for brush production according to a first embodiment is shown. The same reference numerals are used for the components and elements known from the machine in FIGS. 1 and 2, and reference is made to the above explanations.

The machine according to FIGS. 3 to 5 has a schematically shown transport system 11 which is used to transport the basic brush bodies 32 between different stations.

The transport system 11 has two carrier units 12 which are attached to a guide 26 shown schematically here and which can be adjusted independently of one another by means of a drive device. Specifically, the carrier units 12 are mounted and guided so as to be rotatable about a central axis M. For this purpose, drive shafts or other suitable components can be used, the construction of which is not relevant in detail. This makes it possible to adjust the individual carrier units individually from one another (with the restriction that one carrier unit cannot overtake the other). Each carrier unit 12 is provided with two clamping devices 30, each of which can detachably accommodate a brush base body 32. The tensioning devices 30 can, similarly to the machine known from FIGS. 1 and 2, be mounted pivotably.

As can be seen in FIGS. 3 and 4, the machine here has a drilling station 16 and a tamping station 18.

In FIG. 4, the drilling station 16 and the tamping station 18 are shown diametrically opposite one another in relation to the central axis M. However, this is not mandatory; the stations can also be arranged at an angular distance other than 180 °.

As can be seen in FIG. 3, the drilling station 16 has two drilling tools 50 which are assigned to the two clamping devices 30 of the carrier unit 12. In the illustration of FIG. 4, only the upper one of the two drilling tools 50 can be seen.

As can also be seen in FIG. 3, the stuffing station 18 has a single stuffing tool 52. In order to be able to provide the brush base bodies 32 of the two clamping devices 30 with bundles of bristles, this is so adjustably attached (see arrow P) that the two brush base bodies 32 can be processed.

It is just as well possible for the stuffing tool 52 to be attached in a stationary manner and for the carrier unit 12 or a holder mounted thereon, which carries the clamping devices 30, to be adjusted vertically so that the stuffing tool can introduce the bristle bundles into the basic brush bodies 32.

Even if an embodiment is shown in FIGS. 3 to 5 in which the carrier units 12 are mounted pivotably about a central axis M, the carrier units can just as easily be adjusted along a guide track in the same way as that shown in FIGS. 1 and 2 .

In a simple embodiment, it is assumed that each drilling tool 50 can drill around 500 holes per minute, while the stuffing tool 52 can stuff about 1000 holes per minute with bundles of bristles. It can be seen that despite the fewer number of holes that each Drilling tool 50 can drill per unit of time in comparison with the stuffing tool 52, overall the performance of the machine does not suffer, but the stuffing tool can work uninterruptedly. To put it simply, this is due to the fact that the lower speed can be compensated for by doubling the drilling tools 50. Ultimately, this results in a drilling rate of the drilling station, i.e. the number of holes drilled per unit of time and per drilling tool multiplied by the number of drilling tools, which here is equal to the tamping rate of the tamping station, i.e. the number of holes tilled per unit of time and per tamping tool multiplied by the Number of tamping tools. Specifically, the drilling rate is 1000 holes per minute, and the tamping rate is also 1000 holes per minute.

It is particularly advantageous if the drilling rate of the drilling station is not only equal to the tamping rate of the tamping station, but is greater. For example, to stay with the above example, the plug rate can be 1000 holes per minute, while a drilling rate of 1400 holes per minute can be achieved if each drilling tool 50 can drill about 700 holes per minute. In this case, all of the holes that are to be drilled in a machining cycle are finish-drilled earlier than all the holes that are to be provided with bundles of bristles in the same machining cycle are plugged.

This results in a time free space that can be used sensibly.

Using FIG. 6, it is explained below how the time space can be used that results when all the basic brush bodies located in the drilling station 16 are finished bored faster than all the basic brush bodies 32 located in the tamping station 18 are finished are located.

In the machine shown in FIG. 6, two further stations 70, 72 are arranged behind the tamping station 18, seen in a transport direction T.

The station 70 can be a post-processing station in which the bristles of a bristle base body 32 equipped with bristle bundles are post-processed, for example trimmed, ground, rounded and / or slotted. Station 72 is a loading station in which basic brush bodies equipped with bristles 60 are removed from clamping devices 30, and new basic brush bodies 32 not yet equipped with bristles are inserted into clamping devices 30.

In this machine, the time which the tamping station 18 needs in order to provide the two basic brush bodies 32 with bundles of bristles can be viewed as a processing cycle. Within this processing cycle, several different steps take place in the stations 70, 72, 16 with one and the same carrier unit 12.

The processing cycle begins when a carrier unit, the brush base 32 of which is completely equipped with bundles of bristles, is moved out of the stuffing station 18 (counterclockwise in the exemplary embodiment shown). At the same time, a new carrier unit, which is provided with completely drilled basic brush bodies 32, is moved into the stuffing station 18, so that the stuffing tool 52 begins there to stuff the holes.

The carrier unit 12, which leaves the tamping unit 18, is first indexed to the next station, that is to say further adjusted. Assume that this takes 0.5 seconds here.

In the post-processing station 70, the bristles 60 are trimmed, which takes around 10 seconds. The carrier unit 12 is then moved further to the charging station 72 (with an indexing time of again 0.5 seconds), and the equipped brush base bodies 32 are ejected. Then new (that is, not yet provided with holes) brush base bodies 32 are inserted into the clamping devices 30. This takes around 3 seconds in total.

The carrier unit 12 with the new basic brush bodies is then indexed further to the drilling station 16 (again with an assumed indexing time of 0.5 seconds), and the holes in the basic brush bodies 32 are drilled in the drilling station 16. Here it is assumed that all holes can be drilled together in 15 seconds. A further 0.5 seconds are then required for indexing to the tamping station 18. It can be seen that in the cycle time of 30 seconds, which is predetermined by the tamping speed in the tamping station 18, the brush bodies can be transported to the finishing station 70, can be processed there and can be ejected in the loading station 72. Furthermore, new basic brush bodies 32 can be received in the loading station 72 and drilled in the drilling station 16.

Depending on the type of post-processing that is carried out in the post-processing station 70, a processing time of less than 10 seconds can possibly also be sufficient there. If, for example, a period of 7 seconds is sufficient for the post-processing, more time would be available in the charging station 72 for changing the basic brush bodies. It would also be possible to reduce the drilling speed, which is advantageous both for the quality of the drill holes and for the service life of the drills used.

A further embodiment is shown in FIG. 7, which differs from the previous embodiments in that three clamping devices 30 are now present on each carrier unit 12. Correspondingly, if you stick to the example above and assume the same stopping rate, the time of each processing cycle increases from 30 seconds to 45 seconds, while the time periods required for indexing, post-processing and loading remain identical. It follows from this that there are now 30 seconds available in the drilling station.

The numbers given are only examples. Depending on the tools used, the material of the basic brush body and the type of brushes to be produced, different values result for the processing speeds that are sensible in each case. Brushes with long bristles lead to a slower tamping speed because the tamping tool has to cover longer distances. In the case of dishwashing brushes with very few bundles of bristles, the relative proportion of the time required for indexing is greater than in the case of a brush in which a large number of holes have to be drilled and stuffed in a basic brush body. The depth and the diameter of a hole to be drilled have an influence, as does the material of the brush body; In the case of plastic, the drilling speed must remain so low that the Material does not melt. Finally, the time that is required for reworking the bristles of a stuffed brush body has an effect.

Depending on these parameters, it can prove to be useful to accept the additional expense of a third clamping device instead of two clamping devices per carrier unit. It may also be useful to increase or decrease the drilling speed.

In Figures 8 and 9, a machine according to a second embodiment is shown schematically. The same reference numerals are used for the components known from the first embodiment or the variant embodiments, and in this respect reference is made to the explanations above.

The difference between the first and the second embodiment is that in the second embodiment three support units 12 are used, which can be adjusted independently of one another. In the exemplary embodiment shown, the three carrier units 12 can be pivoted rotationally about the central axis M in the same way as in the first embodiment.

A loading station 72, a drilling station 16, a tamping station 18 and a post-processing station 70 are also used in the second embodiment. In the same way as in the first embodiment, the arrangement of the various stations relative to one another is to be understood here only as an example; Instead of the arrangement shown here with an angle of 90 ° to one another, other angles can also be selected.

The main difference between the first and the second embodiment is that in the second embodiment, the stations that have to be passed through during a processing cycle no longer have to be passed through with a carrier unit 12, but can be "processed" divided between two carrier units. In the exemplary embodiment shown, for example, that carrier unit 12 that is currently located in the drilling station 16 can stay there for just as long as the carrier unit that is located in the tamping station 18. During this In the processing cycle, the third carrier unit 12 can then pass through the post-processing station 70 and the loading station 72.

The particular advantage of the second embodiment is that either more time is available for drilling, or - unlike the variant shown in FIG Win machining cycle.

Claims

1. Machine for the production of brushes, with a stuffing station (18) in which at least one stuffing tool (52) is provided, a drilling station (16) in which more drilling tools (50) are provided than stuffing tools (52) in the stuffing station (18) , and a transport system (11) which has several carrier units (12) which can be moved independently of one another and which each carry two or more clamping devices (30) for basic brush bodies (32), which are further adjusted from the drilling station (16) to the tamping station (18) can be.

2. Machine according to claim 1, characterized in that a drilling rate of the drilling station (16), which is determined from the number of holes drilled per unit of time and per drilling tool (50) multiplied by the number of drilling tools (50), is greater than or equal to a stuffing rate of the stuffing station (18), which is determined from the number of holes stuffed per unit of time and per stuffing tool (52) multiplied by the number of stuffing tools (52).

3. Machine according to claim 1 or claim 2, characterized in that a post-processing station (70) is provided which, viewed in an adjustment direction of the transport system (11), is arranged behind the tamping station (18).

4. Machine according to one of the preceding claims, characterized in that a loading station (72) is provided in which the unequipped brush base bodies (32) are fed to the clamping devices (30) and / or stuffed brush base bodies (32) are removed from the clamping devices (30) can, the loading station (72) being arranged in front of the drilling station (16) as seen in the adjustment direction of the transport system (11).

5. Machine according to one of the preceding claims, characterized in that the drilling tools (50) are each assigned to a clamping device (30) and each tamping tool (52) is assigned to at least two clamping devices (30).

6. Machine according to one of the preceding claims, characterized in that two carrier units (12) are provided.

7. Machine according to one of claims 1 to 5, characterized in that three carrier units (12) are provided.

8. Machine according to one of the preceding claims, characterized in that three clamping devices (30) are provided on each carrier unit (12).

9. A method for producing brushes, in particular with a machine according to one of the preceding claims, wherein the following steps are provided: in a drilling station (16) in a machining cycle with several drilling tools (50) holes are drilled in several basic brush bodies (32), In a tamping station (18), bundles of bristles are successively introduced into the holes of a plurality of basic brush bodies (32) with a tamping tool (52) in the same processing cycle.

10. The method according to claim 9, characterized in that all the holes to be drilled in a machining cycle are drilled at the latest when all the holes to be filled within the same machining cycle are provided with a bundle of bristles.

11. The method according to claim 9 or claim 10, characterized in that the time period within which all holes to be drilled in a machining cycle are completed is 90% or less of the time duration of the machining cycle, preferably less than 70% and particularly preferably less than 60 %.

12. The method according to any one of claims 9 to 11, characterized in that a set of brush bodies (32) is stuffed in the tamping station during a processing cycle, while a further set of brush bodies (32) is processed in the drilling station (16) and at least one another station (70, 72) passes through.

13. The method according to any one of claims 9 to 11, characterized in that a set of brush bodies (32) is stuffed in the stuffing station (18) during a processing cycle, while another set of brush bodies (32) is processed in the drilling station (16) and one in turn Another set of brush bodies (32) passes through at least one further station (70, 72).

14. The method according to claim 13, characterized in that the further set of brush base bodies (32) passes through two further stations (70, 72).

15. The method according to any one of claims 12 to 14, characterized in that the further station is a post-processing station (70) in which the bristles (60) of the bristle bundles introduced into the bristle base body (32) are post-processed, in particular trimmed, ground, rounded and / or slotted.

16. The method according to any one of claims 12 to 15, characterized in that the further station is a loading station (72) in which the brush base bodies (32) are introduced into and / or removed from clamping devices (30).