BE1017647A3 - MACHINE FOR MANUFACTURING TWISTED BRUSHES. - Google Patents

Abstract

A machine is used to produce twisted brushes (2) such as interdental brushes, mascara brushes, medical brushes, which have a twisted carrier portion (3) made of wire sections with a pile trim (4) on one side of the head and an injection coating on the handle side forming the handle. The machine is configured as a production unit (1) with a brush-twisting machine (6) for twisting blanks of brushes (10) having the carrier portion (3) and the bristle trim (4) on the the head, with a finishing machining system (7) as well as with a conveying device (37) for conveying the brush blanks from the twisting machine (6) to the finishing machining system (7). ).

Description

The invention relates to a machine for producing twisted brushes such as interdental brushes, mascara brushes, medical brushes, which have a twisted carrying part made of wire sections with a filling of a twisted brush. hair on the side of the head and an injection coating on the side of the handle forming the handle.

Such twisted brushes require a series of individual, very different finishing steps and different machines for them.

The task of the present invention is to provide a r! machine of the type mentioned at the beginning which is compact and with which completely finished twisted brushes can be manufactured, an adaptation to the different brush models and the different subsequent machining must be possible in a simple manner.

To solve this problem, it is proposed that the machine be configured as a production unit with a machine to twist brushes to twist brush blanks having the carrier portion as well as the head-side hair pad, with a finishing machining system as well as with a transport device for transporting the brush blanks from the twisting machine to the finishing machining system.

A mechanical unit is thus constructed, with which all the finishing steps necessary for the manufacture of twisted brushes can be performed.

In this case, the finishing machining system suitably has a feed station for the brush blanks and an injection molding machine as well as, if necessary, at least one subsequent machining station.

In the feed station, the brush blanks are received in the correct position from the twisting machine and are supplied to the following machining devices.

The finishing machining system suitably has a transport device for transporting the brush blanks, or the brushes, at least between a feed station, an injection molding station, and a pick-up station. Release.

Conveniently, the transport device has supports for supporting the brush blanks to be transported. The brush blanks or the brushes are supported by transport carriers and transported between the individual stations.

Depending on the space available and the requirements, the transport device can be configured either as a linear transport device or as a carousel with carousel arms rotatable about a central axis. In the carousel-shaped embodiment, the transport supports are arranged at the outer ends of the carousel arms.

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Depending on, among other things, the number of machining stations provided for the finishing machining system, the carousel may have three arms or more than three carousel arms, the ends of which can be positioned one after the other at the stations of the carousel. 'machining.

The linear transport device may have a plurality of linear sections and may also form a circulating conveyance particularly in the work plane, in that three or more linear transport sections are coupled to one another.

The feed station may preferably have a magazine with through-holes for receiving the brush blanks. The brush blanks may be temporarily stored in the magazine in the feed station, the magazine also forming an intermediate buffer. The magazine itself can be used as a transport medium for brush blanks.

However, it is preferably provided to provide a centering bar adjacent to the magazine which has centering holes aligned with the holes through the store. In this case, the centering bar adjacent to the magazine serves as a transport carrier for the brush blanks as well as a transfer device for transporting the brush blanks to the following machining stations.

Conveniently at least one injection molding station is provided with a centering device for maintaining centered the wire sections of the brush blanks which project into a mold cavity. This gives an exact orientation of the wire section on the side of the handle, especially also when using the centering bar as a carrier.

According to one embodiment of the invention, the centering device may have centering jaws that can be moved towards one another, with centering profiles open at the edge, for example V-shaped cuts, finding at their acting ends. When the centering jaws act on the wire section, a center alignment occurs in the direction of travel and transverse to it through the centering profiles.

There is also the possibility that transport cassettes are provided as a transport medium. The centering bar adjacent to the magazine serves, in this embodiment, as a transfer device for transferring the brush blanks stored in the transport cassettes which in turn serve to transport the brush blanks to the following machining stations. .

The transport cassettes may also be configured to form part of the injection molding mold during the injection molding process. For this purpose, the transport cassettes respectively have a partial cavity and are introduced with the brush blanks that they contain in the mold in the injection molding machine. In this case, the transport device has supports for transport cassettes that can be releasably connected thereto.

Since a large number of comparatively expensive cassettes corresponding to the number of stations in the plant are used in the use of shaping transport cassettes, this means high costs and also requires effort because the cassettes must also be used. be changed when changing the production model.

This is why the centering bars adjacent to the magazine, already mentioned above, are preferably provided as a transport medium for the brush blanks.

According to an advantageous embodiment of the invention, the transport device for transporting the brush blanks of the machine to twist the brushes to the finishing machining system has a transport channel in which gas flows, a Venturi tube. preferably being provided to produce the stream.

As a result, transport is particularly simple, fast and economical for all brush blanks. Expensive handling devices are avoided.

A particularly flexible tube or hose with an inside diameter that corresponds approximately to the diameter of the bristle trim of the brush blank can be provided as a transport channel for the brush blanks. A flexible pipe as a transport channel has the advantage of being able to be installed in virtually any manner and also to allow a trouble-free connection in the area of the magazine, because it is moved there correspondingly and that the output end The transport channel can be positioned in a particularly simple way in the individual housing of the store.

Advantageously, the magazine has several areas with individual housings for brush blanks, which are alternately associated with a transport channel and the centering bar as a transfer device. The individual housings prevent the brushes with their pile liner from engaging with each other and then remain hooked to each other. Thanks to the alternating association of the individual housings of the magazine on the one hand with the supply side and on the other hand with the discharge side, a sampling independent of the supply of brush blanks, for example an evacuation towards a cassette of transport can take place with the transfer device formed in particular by the centering bar.

According to a preferred embodiment, the magazine has as individual housings two parallel rows of through-holes respectively intended for the individual housing of the brush blanks and can be rotated about an axis parallel to the through holes, the rows of holes. which may be associated with the choice of the transfer device or the transport channel.

During the filling of one of the rows of passage holes of the magazine, brush blanks can already, independently of this, be taken from the other row and processed later.

According to a configuration of the invention, the transfer device has expulsion rods for moving the brush blanks from the row of through holes of the magazine positioned near it at least through the centering holes of the bar centering and, where appropriate, with the carrier portions of the brush blanks in clamping openings of a transport cassette which are alignedly positioned.

The stored brush blanks can thus be either driven into the centering passage holes of the centering bar and transported by means of the centering bar or the brush blanks are pushed to the contrary in the clamping openings of the centering cassettes. transport through the centering holes, an exactly centered feed of the wire carrying parts being obtained. Production interruptions due to oblique or jammed wire sleeves are thus avoided. With the expulsion rods, the brush blanks that are associated with the centering bar and are in the magazine are all expelled at the same time.

The brush blanks can in the transport position in the transport channel be arranged with their wire section on the side of the handle pointing in the direction of transport. Such a transport position of the brush blanks is particularly advantageous when a linear transport device is provided as a transport device. The brush blanks thus arrive in the correct position, in particular during the transport of the brush blanks to an injection molding machine.

When the brush blanks in the transport position are transported, as previously mentioned, in the transport channel with their wire section on the handle side pointing in the transport direction but on the other hand, this transport position is not suitable. not for further processing, for example with a transport device configured as a carousel, a turning device for the brush blanks can be provided in particular near the carousel.

Preferably, however, the brush blanks are, in such cases, arranged and transported in the transport position in the transport channel with their pile lining pointing in the conveying direction.

Conveniently there is provided a bending device for deforming the wire section of the injection-molded brush blank.

Profiling, for example a bend, can be printed in the wire handle, which prevents the twisted or wound wire handle from being removed from the injection molded handle in a subsequent operation.

The folding device may be arranged downstream of the magazine or the centering bar or the transfer device.

There is also the possibility that the folding device is already associated with the machine to twist the brushes. Since profiling generally does not protrude beyond the cross-section of the pile liner, transport and handling of the brush blanks are not compromised during subsequent machining.

Additional configurations of the invention are set forth in the other dependent claims. The invention will be further explained in more detail below with its essential details based on the drawings.

It is shown schematically on Lafig. 1 a production unit with a brush-twisting machine, a finishing machining system and a packing station,

Fig. 2 a brush blank transported in a transport channel by means of compressed air,

Fig.3 to

Fig. 5 each time side views taken in section in the region of the handle of different twisted brushes,

Fig. 6 a feeding station with magazine and transfer device,

Fig. 7 the arrangement shown in FIG. 6, but here in another work position and with an associated folding device,

Fig. 8 a sectional representation of a centering bar with associated transport cassette,

Fig. 9 a representation corresponding approximately to FIG. 8, but here in another working position, and FIG. A partial sectional representation of an injection molding mold with a brush blank inserted or inserted, a transport carrier and a centering device.

A production unit 1 shown in FIG. 1 is used to make twisted brushes 2 such as, for example, interdental brushes, mascara brushes, medical brushes and the like. These brushes consist essentially of a carrier part 3 twisted into sections of yarn with a hair lining 4 on the side of the head and an injection coating on the side of the handle forming the brush handle 5.

The production unit 1 essentially presents a machine for twisting brushes 6, a finishing machining system 7 which has, in the exemplary embodiment, two injection molding machines 8, 8a, and a station downstream packaging.

The brush blanks 10 produced by the brush-twisting machine 6 consist of the carrier portion 3 twisted into wire sections with a head-side hair lining 4, a wire-side section 11 of the handle following the pile lining 4, as is clearly visible in FIG. 2.

Automatic transfer of these brush blanks 10 to the finishing machining system 7 and to the first injection molding machine 8 forming part of the finishing machining system takes place by means of the transport device 37. This is indicated by the arrow PF1 in FIG. 1.

In this case, there is provided as transport device 37 a transport channel 12 (FIG 2) in which a gas flows, the transport by gas preferably taking place by means of a Venturi tube not shown here. The transport channel 12 is preferably a flexible hose with an inner diameter that corresponds approximately to the diameter of the bristle pad 4 of the brush blank 10.

A handle portion 13 is injection molded, in the present example, into the injection molding machine 8, while an injection coating of this handle portion 13 takes place with the injection molding machine 8a and the handle Brush 5 is thus completed.

The brush handle 5 thus consists of two injection molding components.

The brushes 2 are then brought into a subsequent machining station 14 or into a control station where, for example, a final check is made and / or a stamp or additional pieces can be stamped, such as a sealing case, can be mounted. Subsequently, a transport of the brushes 2 takes place to a sampling or ejection station 15 where the brushes 2 are removed or ejected or are brought to the packing station downstream 9. The transfer of the brushes from the station 15 to the packing station 9 can be undertaken, for example, using positionable clamps.

In the embodiment shown in FIG. 1, the finishing machining system 7 has a transport device 38 for transporting the brush blanks 10 or the brushes 2 by means of a linear transport device. This linear transport device suitably has supports 17 which can be connected to the transport cassettes 16 (see Figs 6 to 9).

Instead of the linear transport device, the transport device 38 can also be configured as a carousel with carousel arms rotatable about a central axis and on the outer ends of which are disposed supports 17 for the transport cassettes 16 In the case of a carousel with four arms, the different carousel arms can be coordinated one after the other at a feed station, for example where brush blanks are fed, and then to a first molding machine. by injection 8, then to a second injection molding machine 8a and finally to a sampling station 15.

It should also be mentioned that the second injection molding machine 8a which serves, in the present example embodiment, to inject a first handle portion 13, may also be arranged to manufacture additional parts for the brushes 2, for example. For example, a plug-in or screw-on cap, which are then connected to the brushes 2 in the subsequent machining station 14. Consequently, the subsequent machining station 14 may also include one or more mounting stations.

The injection molding machines 8, 8a suitably have vertically disposed closure units, which is advantageous, in particular with two injection molding stations arranged side by side, because of the space required. which is only available to a limited extent.

Figs. 6 and 7 show a feeding station 18 in which the brush blanks 10 fed via the transport channel from the machine to twist the brushes 6 are transferred into the transport cassettes 16.

In the transport cassettes 16, the brush blanks 10 are supported by clamping their wire section 11 on the handle side, which is why the brush blanks 11 are also transported in the transport channel 12 with their wire sections 11. on the side of the handle in the lead.

The feed station 18 has a magazine 19 for receiving the brush blanks 18 and a transfer device 20 thereafter for the transfer of the brush blanks stored in the transport cassettes 16. The magazine 19 is configured as a swiveling magazine and can for this purpose rotate 180 degrees about a pivot axis 21 according to the arrow PF 2 in Figs. 6 and 7. The magazine 19 has, as individual housings for the brush blanks 10, two rows of through-holes 22, each row being able to have, for example, eight of these through-holes 22. The upper row, in the exemplary embodiment, passage hole 22 is coordinated with the transport channel 12, while the lower row of passage holes 22 present in identical number is coordinated with the transfer device 20. Thanks to the pivoting of the magazine around the pivot axis 21 , the coordination of the rows of passage holes is permuted. Thanks to the pivoting of the magazine, an independent emptying of the filling is possible.

The outlet end 23 of the transport channel 12 can be positioned as a hole-hole in the upper row of through holes 22, so that the brush blanks arriving via the transport channel 12 can be deposited next to each other. others in the upper through holes. 24 again denotes an abutment buffer which stops the ends of the brush blanks 10 abutting at this location, so that they are positioned in the correct position within the through holes 20 of the magazine.

By pivoting the magazine 19 around the pivot axis 21, the stored brush blanks 10 arrive in the lower zone. The transfer device 20 disposed at this location has an expulsion rod row 25 and a centering bar 26. The number of the expulsion rods preferably corresponds to the number of through holes 22 in a row of the magazine 19 so that all brush blanks 10 in the through holes 22 can be expelled at the same time.

The number and arrangement of the through holes 22 of the magazine and the centering through holes 27 of the centering bar 26 as well as the clamping openings 28 of the transport cassette 16 and cavities of the injection molding tool are identical in particular for optimum cooperation of the functional elements. The centering bar has centering through holes 27 which are sized to receive the bristled portion of the brush blank 10. In the transfer position, the expulsion rods 25, the lower through holes 22, the centering through holes 27 and the clamping openings in the associated transport cassette 16 are aligned with each other, as shown in FIG. 6. The brush blanks 10 are already here in the centering bar 26 and pass through their wire sections 11 on the handle side the clamping openings 28 of the associated transport cassette 16. During the expulsion of the brush blanks 10, through-holes 22 from the magazine into the centering bar 26 by means of the expulsion rods 25, as can be seen in FIG. 8, the clamping openings 28 of the transport cassette 16 are open. It is also very clear here that the centering through holes 27 have funnel-shaped conformations 29 at their ends on the outlet side, so that the wire sections are centrally inserted into the clamping openings 28 of the transport cassette 16. Both the centering bar 26 and the transporting cassette 16 are respectively configured in two parts with a separation plane passing through the longitudinal central plane in the region of the centering holes 27 or the clamping openings 18. As a result, they can be placed respectively in the open position or in the closed position. The closing position of the centering bar 26 is visible in FIG. 8 and that of the clamping opening 28 is in FIG. 9, while the open position of the clamping openings 28 is shown in FIG. 8 and the open position of the centering bar 26 is shown in FIG. 9.

The opening of the clamping openings 28 is necessary so that the handle-side wire sections 11 are inserted, and then held tight in the closed position (Fig. 9). In the case of the centering bar, the opening is necessary so that the brush blanks 10 can be removed, as can also be seen in FIG. 7.

The opening of the clamping openings 28 is shown somewhat enlarged in FIG. 8 for purposes of explanation and is in practice in practice only a few tenths of a millimeter, for example two tenths of a millimeter. To open and close the centering holes 27 or the clamping openings 28, there is provided drive means not shown here.

A folding device 30 for deforming the section of fiM1 to be coated by injection of the brush blank 10 is disposed downstream of the transfer device 20 is, as can be seen in FIG. 7. It is thus possible to deform the wire section, as shown for example in Figs. 3 and 5, elbow-shaped. This reliably prevents the wire section 11 from being unscrewed in the case of an injection-coated brush handle 5, 5a.

The folding device 30 has a receiving member 32 with holes 33 which are aligned with the clamping openings 28 of the associated transport cassette 16 and in which the wire sections 11 of the brush blanks 10 extend. In the region of the bend 31 to be formed, the receiving member 32 has slots 34 extending transversely to the lengthwise extent of the holes 33 for engaging compression rods 35, 35a therein. At their oriented ends towards each other, the acting sides of the compression bars 35, 35a are formed complementary to each other and have, in the exemplary embodiment, in the case of the compression bar 35 has a convex shape and in the case of the compression bar 35 has a concave shape corresponding to the bend 31 to be formed.

During the folding process, the sections of the wire outside the slot 34 in the holes 33 are held to ensure that the wire section 11 on the handle side remains perfectly straight so that it engages centrally in the mold cavity during subsequent injection coating for making the handle and also centrally positioned in the resulting handle.

After stamping the bend 31 in the wire section 11, the receiving element 32 opens, in that the parts of the receiving element 32 are on both sides of the separation plane passing through the longitudinal central plane. holes 33 deviate from each other. The brush blank 10 can then be removed and transported held by the transport cassette 16 to the injection molding machine 8. The support 17 which is connected to the transport cassette 16 can, in this case, be part of a linear transport device or be part of a carousel.

The transport cassette 16 is positioned, in the injection molding machine 8, on the stationary forming plate of the injection forming tool such that the transport cassette 16 forms a closure on the end side of the injection molding machine. the cavity in question. The adjacent recesses 36 in the area of the clamping apertures 28 are, in this case, part of the recess and form the end of the brush handle 5 oriented towards the bristle pad 4.

Thanks to the portion of the handle 5 or the portion 13 of the handle engaging in the recess 36 of the transport cassette 16, the brush is not only held tight by the clamping opening 28 of the transport cassette 16 at its lead carrier portion 3 after the (first) injection molding process but is also stabilized by engagement of the inner end of the handle into the recess 36. This prevents the subsequent course of the machining of the brush in the machining stations or control stations, an inappropriate folding of the handle portion with respect to the section of the pile lining occurs. This also helps to avoid rejects and disruption of operation.

After the injection molding process, the brushes 2 remain connected to the transport cassette 16 by its clamping apertures 28 and the shape matching of the pieces and are fed to a next machining station or another molding machine. by injection 8a. It is only in the sampling station 15 that a separation of the brushes 2 from the transport cassette 16 occurs.

Figures 3 to 5 show different embodiments of twisted brushes 2. FIG. 3 and FIG. 4 show interdental brushes, the wire section 11 on the handle side in FIG. 3 having an elbow 31 as a raised shape, while in FIG. 4, the end of the wire section 11 is generally not bent.

Fig. 5 shows a mascara brush whose handle 5a is configured as a threaded plug. The wire section 11 on the handle side also here has an elbow 31 as a relief shape.

Fig. 10 shows in partial sectional representation an injection molding mold 41 with a brush blank 10 having a handle-side wire section 10 protruding into the cavity of the injection mold. In the exemplary embodiment shown, the centering bar 26a serves as a transport support 39 for the brush blanks 10 and also, if appropriate, after the injection molding of the brush handle 5, for the subsequent transport of the brushes so that that the transport cassettes 16 with support 17 provided in the embodiment according to FIGS. 6 to 8 are not needed here.

In this embodiment, the forming part 36 of the transport cassette 16 is part of the injection molding mold 41 and is designated 36a. The injection molding mold also has, therefore, clamping openings 28a through which the wire section 11 is introduced into the mold cavity 42.

In the exemplary embodiment shown, the mold is not completely closed and, therefore, the wire section 11 is not yet tightened. Due to this clamping which is also used for sealing, a position of the centrally oriented wire section 11 in the mold cavity 42 is obtained by means of a centering device 40. The centering device 40 is part of suitable manner of the injection molding station having the injection molding mold.

The centering device 40 has centering jaws 43 in the form of scissors, which can be moved towards each other, with centering profiles 44 open at the edge, preferably V-shaped notches, located at their edges. acting ends. To act on the wire section 11 of a brush blank 10, the centering jaws 43 are tightened along the double arrow Pf3 and thereby align the wire section to the extent that it deviates from the rectilinear position. With the centering device 40, the wire section 11 is held in a straight position so that additional attachment by a funnel-shaped conformation 29, as can be seen in FIG. 8, is not necessary here.

After the injection coating of the wire section 11 and thus the formation of the brush handle 5, the mold is opened and the brush is transferred to the next machining station or is ejected.

Claims (42)

A machine for making twisted brushes (2) such as interdental brushes, mascara brushes, medical brushes, which has a twisted carrier portion (3) made of wire sections with a pile trim (4) on the side of the head and an injection coating on the side of the handle forming the handle, characterized in that the machine is configured as a production unit (1) with a machine for twisting brushes (6) for twisting brush blanks (10). ) having the carrier part (3) as well as the head-end pile lining (4), with a finishing machining system (7) as well as with a conveying device (37) for conveying the blanks of brush (10) of the twisting machine (6) to the finishing machining system (7). 2. Machine according to claim 1, characterized in that the finishing machining system (7) has a feed station (18) and an injection molding machine (8, 8a) and, where appropriate, at least one subsequent machining station (14). Machine according to claim 1 or 2, characterized in that the finishing machining system (7) has a conveying device (38) for conveying the brush blanks (10), or the brushes (2), at least between a feed station (18), an injection molding station (8, 8a) and a sampling or ejection station (15). 4. Machine according to claim 3, characterized in that the transport device (38) is configured, where appropriate, as a linear transport device in circulation. 5. Machine according to claim 3, characterized in that the transport device (38) is configured as a carousel with carousel arms rotatable about a central axis. 6. Machine according to claim 5, characterized in that the carousel is configured with three arms or more than three carousel arms. Machine according to one of claims 1 to 6, characterized in that the finishing machining system (7) has a plurality of injection molding stations (8, 8a) for a handle (5, 5a) consisting of several injection molding components and / or for additional parts for brushes, in particular a plug or screw plug. 8. Machine according to claim 7, characterized in that the (the) injection molding station (s) (8, 8a) has (s) a closure unit arranged vertically. 9. Machine according to one of claims 1 to 8, characterized in that the finishing machining system (7) has one or more mounting stations. 10. Machine according to one of claims 1 to 9, characterized in that the finishing machining system (7) has one or more subsequent machining stations (14) and / or control stations. 11. Machine according to one of claims 1 to 10, characterized in that the transport device (37) has for transporting the brush blanks (10) a transport channel (12) in which a gas flows and in that that a Venturi tube is preferably provided to produce the flow. Machine according to claim 11, characterized in that there is provided as a transport channel (12) for the brush blanks (10) a tube or hose in particular flexible with an inner diameter which corresponds approximately to the diameter of the bristle trim (4) of the brush blank (10). 13. Machine according to one of claims 1 to 12, characterized in that the transport device (38) has transport carriers (39) for supporting the brush blanks (10) to be transported. Machine according to claim 13, characterized in that in the case of a transport device (38) configured as a carousel with carousel arms rotatable about a central axis, the transport supports (39) are arranged at their outer ends. 15. Machine according to one of claims 11 to 14, characterized in that the brush blanks (10) in the transport position in the transport channel (12) are arranged with their wire section (11) on the handle side. pointing in the direction of transport 16. Machine according to one of claims 13 to 15, characterized in that in particular in the case of a transport device (38) configured as a carousel and a transport position brush blanks (10) to l In the interior of the transport channel (12) with their wire section (11) on the handle side pointing in the transport direction, a turning device for the brush blanks (10) can be provided near the carousel. Machine according to one of claims 11 to 14, characterized in that the brush blanks (10) in the transport position in the conveying channel (12) are arranged with their pile lining (4) pointing in the direction transport. Machine according to one of Claims 1 to 17, characterized in that at least one injection molding station (8, 8a) is provided with a centering device for keeping the section of wire (11 ) brush blanks (10) which protrude into a mold cavity, respectively. 19. Machine according to claim 18, characterized in that the centering device (40) has centering jaws that can be moved towards one another, with centering profiles open at the edge, located at their operating ends. . 20. Machine according to one of claims 2 to 19, characterized in that the feed station (18) has a magazine (19) with passage holes (22) for receiving the brush blanks (10). Machine according to claim 20, characterized in that the magazine (19) serves as a carrier (39) for the brush blanks (10). 22. Machine according to claim 20, characterized in that a centering bar (26, 26a) is provided adjacent to the magazine (19), which has centering holes (27) aligned with the passage holes of the store. 23. Machine according to claim 22, characterized in that the centering bar (26, 26a) adjacent to the magazine (19) serves as a carrier (39) for the brush blanks (10). 24. Machine according to one of the preceding claims, characterized in that the transport cassettes (16) are provided as transport carriers (39). 25. Machine according to one of claims 2 to 24, characterized in that the centering bar (26, 26a) adjacent to the magazine (19) serves as a transfer device (20) for transferring the brush blanks (10) stored in the transport cassettes (16) or for transferring the brush blanks (10) to an injection molding station (8, 8a) or a similar machining station. 26. Machine according to claim 24 or 25, characterized in that the transport cassettes (16) can be connected to supports (17). 27. Machine according to one of claims 1 to 26, characterized in that the transfer device (20) has expulsion rods (25) for moving the brush blanks (10) of the row of passage holes of the store located near it at least in the centering passage holes (27) of the centering bar (26) and, where appropriate, with the carrier parts (3) of the brush blanks (10) in clamping openings (28) of a transport cassette (16) which are aligned. 28. Machine according to one of claims 20 to 27, characterized in that the magazine (19) has several zones with individual housings for brush blanks (10), which can be associated alternately with the transport channel (12). as well as the centering bar (26) or the transfer device (20) formed by it. 29. Machine according to claim 19, characterized in that the centering bar (26) and the transport cassettes (16) are respectively configured in two parts with a separation plane passing through the longitudinal central plane. 30. Machine according to one of the preceding claims, characterized in that the centering bar (26) and the transport cassettes (16) are connected or can be respectively connected to drive means for opening and closing. close along their separation plan. Machine according to one of claims 24 to 30, characterized in that the transport cassettes (16) have clamping openings (28) for the carrier parts (3) of the brush blanks (10) which consist of twisted wire. 32. Machine according to one of claims 24 to 31, characterized in that the transport cassettes (16) are configured in bar form with a row of clamping openings (28). 33. Machine according to one of claims 24 to 32, characterized in that the transport cassettes (16) are part of the injection molding mold during the injection molding process. 34. Machine according to one of claims 31 to 33, characterized in that the transport cassettes (16) have recesses (36) adjacent to the clamping openings (28) as part of the mold cavity. 35. Machine according to one of claims 20 to 34, characterized in that the magazine (19) has as individual housing two parallel rows of through holes respectively for the individual housing of brush blanks (10) and can be set in rotation about an axis parallel to the through holes, the rows of through holes may be associated with the choice to the transfer device or the transport channel. 36. Machine according to one of claims 11 to 35, characterized in that the output end of the transport channel can be positioned at the individual housing of the magazine (19). 37. Machine according to one of claims 1 to 36, characterized in that the number and arrangement of the through holes (22) of the magazine and the centering passage holes (27) of the centering bar (26) and that clamping openings (28) of the transport cassette (16) and cavities of the injection molding tool are identical. 38. Machine according to one of claims 1 to 37, characterized in that a folding device (30) is provided for deforming the wire section (11) to be coated by injection of the brush blank (10). ). 39. Machine according to claim 38, characterized in that the folding device (30) is arranged downstream of the magazine (19) or the centering bar (26) or the transfer device (20). 40. Machine according to claim 38, characterized in that the folding device (30) is associated with the machine for twisting brushes (6). 41. Machine according to one of claims 38 to 40, characterized in that the folding device (30) has two compression bars (35, 35a) movable relative to each other with shaped acting sides. complementary means facing each other between which the brush blanks (10) can be introduced in the open position of the compression bars (35, 35a) and can be deformed by closing the compression bars (35, 35a). 42. Machine according to one of claims 38 to 41, characterized in that the folding device (30) has a receiving element with holes (33) for the wire sections (11) on the handle side of the blanks. brush (10), which holes are aligned with the openings (22) of the magazine (19) or the centering holes (27) of the centering bar (26) or the clamping openings (28). an associated transport cassette (16) and that the receiving element (32) has slots (34) for engagement of the compression bars (35, 35a) in the lengthwise extent of the holes (33) .