• 专利附录
  • 专利说明
  • 权利要求
  • 类似技术
  • 同族专利
  • 引用文献
  • 法律状态
  • 优先权
    • 专利摘要:
    A device for producing brushes with tufts of bristles (1) coated, the device having at least one brush injection molding device and a tufts lining device (31) for filling the partial bodies brush (2) with tufts of bristles (1). The device has at least one cassette (15) forming a support piece for one or more brose partial bodies (2), which can be positioned together with the brush body (s) (2) near the lining device tufts of bristles (31) for filling the partial brush bodies (2) with tufts of bristles (1). The injection molding device has an injection tool with a recess (40) for placing the cassette (s) provided with at least one partial brush body. Due to the placement of the cassette together with the partial brush body filled with tufts of hair, it only takes a very short time during which the mold must be opened. In addition, the tufts of bristles are retained by a longer guiding longeuer.
    公开号:BE1018140A3
    申请号:E2007/0465
    申请日:2007-09-27
    公开日:2010-06-01
    发明作者:Matthias Schubnell；Bernard Rees
    申请人:Zahoransky Ag；
    IPC主号:
    专利说明:

    The invention relates to a method for making brushes, in which a partial brush body provided with passage holes is lined with tufts of bristles and their attachment ends at the back are thickened and wherein the attachment ends are then coated by injection.
    The invention further relates to a device for manufacturing brushes with tufts of bristles coated by injection, the device having at least one injection molding device for brush bodies and a tufts filling device for garnishing partial brush bodies with tufts of bristles.
    DE 43 02 870 A1 discloses a method and a device for producing brushes, in which a partial brush body is first injection molded and its through holes are filled with tufts of bristles. The lining with tufts of bristles takes place either directly in the mold, which has for this purpose mold holes through which the tufts of bristles are pushed into the through holes of the partial brush body in the mold. Or the tufts of bristles are first filled in a hole plate which is then positioned near the mold and from which the tufts of bristles are pushed into a mold half and into the partial brush body located in the mold. In the region of the mold, it is thus expected to work phases that take comparatively long time and by which the working cycle of the injection molding device is negatively influenced.
    The object of the present invention is to provide a method and a device for making brushes with which it is possible to simply and quickly produce safe and secure, particularly time-consuming work steps being particularly avoided in the region of the device. injection molding.
    In order to achieve a goal, it is proposed, with respect to the method according to the invention, that the partial brush body being in a cassette serving as a support piece, giving a shape and having tuft-receiving holes aligned on the passage holes of the partial brush body, is trimmed with tufts of bristles and the partial brush body is placed with the cassette in an injection molding mold and a molding completing or completing the partial brush body is undertaken.
    With regard to the device according to the invention, it is proposed that it has at least one cassette giving a shape as a support piece for one or more partial brush bodies, which can be positioned with the partial body or brushes near the pile tufting device for filling the partial brush bodies with tufts of bristles and the injection molding device has an injection tool with a recess for placing the cassette (s) provided therewith (s) at least one partial brush body.
    The cassette with the tufted bristle partial body, which is placed and held in the cassette, is thereby directly placed from a pile tufting station in the injection tool, which takes very little time, so that the mold should, therefore, be opened only briefly. Apart from this placement in the injection tool, there are no other work phases, since the packing of the partial breaststroke with tufts of bristles can already be undertaken near the filling station. tufts of bristles during the closed phase of the injection molding device.
    The recess in the injection tool for placement of the cassette with the partial brush bodies is configured and dimensioned so that the cassette and, where appropriate, tufts of bristles passing through its receiving holes The cassette then fits precisely as part of said mold half into the injection tool.
    What is also particularly advantageous is that the tufts of bristles are maintained by their greater guide length, since they extend as well through the partial brush body as at least partly in the cassette. As a result, the tufts of bristles are securely held in alignment with the partial brush body and do not tilt in the case of very thin partial brush bodies. This results in a good constant quality of the brushes produced.
    The cassette can serve not only as a support piece for the partial brush bodies and for transporting these partial brush bodies of the pile tuft packing device into the injection tool, but can also be used as a piece for form during injection molding of the partial brush body itself. In this case, it is particularly appropriate that the injection molding device is preferably formed with a multi-station tool at least for the injection of partial brush bodies as well as for the injection of coatings covering the ends of the brush. fixing the tufts of hair, so for partial coatings or an injection completing the partial brush body.
    The injection-molded partial brush bodies are in this case removed with the cassettes of the injection tool and are fed to the pile-tuft lining device and are then placed again with the cassette in the tool. injection for an injection coating.
    There is conveniently provided a removable holding device for holding the partial brush bodies in the cassette.
    A connection between the cassette and the partial brush body during transport and also during the filling with tufts of bristles is thus possible.
    In order to automate the working phases, at least one handling device may be provided for bringing the packed cassette (s) of partial brush bodies to the injection molding tool of the molding device. injection.
    This can then also be used to transport injection molded partial brush bodies from an injection molding device to a pile tuft packing device.
    The tuft receiving holes in the cassette are closed during the injection molding of the partial brush bodies where the cassette is a shape portion. Hole pins, if any extended, which are already present to practice the passage holes of the partial brush bodies, suitably serve as closure elements.
    In this case, the hole pins pass through the tuft receiving holes of the cassette and protrude into the mold cavity in which the partial brush body will be injection molded. Passage holes in the partial brush bodies exactly aligned with the tuft receiving holes of the cassette (s) are thus created.
    Additional embodiments of the invention are set forth in the other dependent claims. The invention will be explained in more detail below with its essential details based on the drawings.
    It is shown somewhat diagrammatically in FIG. 1 a tufted filler plate forming part of a pile material feed with an associated filling tool,
    Fig. 2 a side view of the filler plate with associated cutting plate, a set of pins as well as profiling pins,
    Fig. 3 the cutting plate in the area of a contouring and cutting device,
    Fig. 4 a tufting device for tufts of hair,
    Fig. 5 a heating station,
    Fig. 6 a cassette placed in a mold part together with a partial brush body lined with tufts of bristles,
    Fig. A detail view of a tuft of bristles in a partial brush body partially shown in forming a thickening by means of a heating plate,
    Fig. 8 a view corresponding approximately to FIG. 7, the thickening being effected by means of a pressure plate in a cross-sectional enlargement of a tufted bristle hole.
    Figures 1 to 3 show a supply of bristle material 30 of a device for making brushes with tufts of bristles coated by injection, with which tufts of bristles 1 are prepared to be subsequently connected to a partial brush body 2 in a pile tufting device 31 (FIG 4).
    Tufts of bristles 1 are taken individually from a stock of bristles comprising bristle material preferably already treated at one end and transferred by means of a pusher 32 and a filling tool 3 into a filling plate 4 (figure 1). The filler plate 4 has holes 5 arranged approximately corresponding to the bristle area of the completed brushes. This filling plate can be tilted for example by means of a tilting axis 6 and can be associated by a tilting movement to a cutting plate 7 (FIG. 2). The filling plate 4 then rests flat against the cutting plate 7, the holes 5 of the filling plate 4 being aligned with the holes 8 of the cutting plate 7. The tufts of bristles 1 of the filling plate 4 are pushed into the holes 8 of the cutting plate 7 with pins 9 forming part of a set of pins.
    The cutting plate 7 is associated with a profiling and profiling plate 10 which has contouring and profiling rods 11. These contouring and profiling rods 11 engage the useful ends 12 of the tufts of bristles 1 and move these in such a way that a desired profile of the bristle area results (FIG. 3). The contouring and profiling rods 11 may be formed at their front ends to also contour the individual filaments of the tuft of bristles concerned, the useful ends 12 of the tuft of bristles 1 being displaced in a complementary manner and the useful ends being contoured. In the contoured and profiled position, the tufts of bristles are cut flat at their attachment ends 13 by means of a cutting knife 14.
    A cassette 15 with one or preferably several partial brush bodies 2 contained therein is then fed to the cutting plate 7 in the pile tufting device 31 according to FIG. 4 and the tufts of bristles 1 located in the cutting plate 7 is pushed with the contouring and profiling pins 11 through the tuft receiving holes 16 of the partial body cassette 15 into the partial brush body 2 having through holes 17. In the example embodiment, there is shown a partial brush body 2 of a toothbrush with a head region 34 having through holes 17 and a subsequent handle 35, shown only in part.
    The partial brush body is an injection molded part which is fed as a separate piece to the pile tufting device 31 and can be placed in a cassette 15 positioned there. The partial brush body 2 is held in the cassette 15 by means of a support device 37.
    But the cassette can also be used during the injection molding of the partial brush body 2 so that after the injection molding of the partial brush bodies, these can then be removed from the injection tool and brought to to the pile tufting device 31 together with the cassette.
    The holes 8 of the cutting plate 7 intended to receive the tufts of bristles 1 are generally round, while the partial brush body 2 may also have holes in the form of a line. To fill these stripe-shaped holes, several tufts of bristles are advanced from the cutting plate 7. For this purpose, the tuft receiving holes 16 of the partial body cassette 15 are provided with hole transition formations. 8 of the cutting plate 7 to the oblong shaped holes of the partial brush body 2.
    We can see on fig. 4 to 8 that the partial brush body 2 has on the rear side of the annular projections 18 adjacent its through holes 17. These serve among other things to enlarge the guide length of the tufts of bristles 1. Such annular protrusions 18 may also be provided on the front side. The annular projections 18 may also be configured to form sealing members surrounding the tufts of bristles in that they are somewhat deformed under the influence of the injection pressure. This can be achieved for example because the annular projections 18 have walls narrowing towards their free ends. Due to this measurement in relation to the position of the sealing thickenings 19 on the rear side at the projections 18, it is prevented that the injection material can penetrate the through holes 17 during the injection of the back of the body. of brush.
    The cassette for partial body 15 with or preferably several partial brush bodies 2 and tufts of bristles 1 put in place is fed to a heating station 20 (FIG 5) comprising a heating plate 21 to form thickenings 19 (Figs 6 to 8) on the attachment ends 13 of the tufts of bristles. In the exemplary embodiment shown, only a partial lining with tufts of bristles 1 is shown for the sake of clarity.
    The fixing ends 13 of the tufts of bristles 1 are retained, during heating and the formation of the thickenings 19, at a distance from the partial brush body 2 and also with respect to its annular projections 18 (FIGS. and the thickened fastening ends 19 are then pressed with a pressure plate 38 in a sealed manner against the edges of the through-holes 17 of the partial brush body 2. In the exemplary embodiment shown, the passage 17 have at their inner ends a widening of cross-section 39 in the form of a bucket in which the melted thickenings 19 and, if appropriate, pushed back are pressed. This provides a particularly safe seal so that there can not be penetration of the injection material into the region adjacent to the through holes 17 during a subsequent injection operation.
    The attachment ends 13 of the tufts of bristles which are preferably held at a distance during the thickening can also remain, if necessary, in this remote position. A displacement of the tufts of bristles 1 with, if appropriate, sealing position on the edges of the through holes 17 and connection with the partial brush body 2 can also take place, if necessary, under the action of the pressure. injection during the injection of the coating.
    The heating plate 21 of the heating station 20 can be remotely positioned during the heating of the fixing ends 13 so that the heating takes place by radiant heat. But the heating plate can also contact the attachment ends 13 of the tufts of bristles 1 with its heating side 22 and thereby form the thickenings 19 in the form of a mushroom. In this case, the useful ends 12 are supported at the other end by a profiled plate 23 during the application of the heating plate 21 on the fixing ends 13. This profiled plate can, on the one hand, be adapted to the profiling predefined by the different lengths of the tufts of bristles and, on the other hand, also present a forming corresponding to the predefined contour in the region of support of the tufts of bristles.
    The partial brush bodies 2 can then be fed to an injection tool including a partial mold 24 with a recess 40 and a partial counter mold 25 with a mold cavity 26 corresponding to the brush back to be formed. fig. 6. The cassette 15 is placed in the recess 40 and supports with its receiving cavity 36 the partial brush body 2 lined with tufts of bristles 1.
    In the exemplary embodiment, the useful ends 12 of the tufts of bristles 1 protrude from the outside of the cassette 15. The recess has a free space 41 corresponding to the maximum extension of the tufts of bristles. The cassette can bear against the partial mold 24 on the edge side, if necessary also in intermediate regions where there is no tuft of bristles.
    It is also possible to size the cassette 15 such that the length of its tuft receiving holes 16 is sufficient to fully accommodate the tuft of bristles 1. In this embodiment, the recess 40 in the partial mold 24 can be configured with a contour identical to that of the cassette 15 so that it can rest flat on the bottom of the recess and the cassette 15 is therefore particularly well supported. Thus the tuft receiving holes 16 may further be closed on the outside during the injection operation.
    A handling device not shown here can also be provided for transporting cassettes 15 lined with partial brush bodies 2 to the injection tool of the injection molding device.
    When the cassette is already provided as a piece giving a shape, removable, during the injection of the partial brush body 2, the handling device can also be used to remove the cassette with the partial brush bodies 2 of the tool d injection after the injection operation and to bring it as a unit to the pile tufting device 31.
    For the injection operation of the coating, the partial against-mold 25 is placed on the partial mold 24 and the mold is thus closed. During the coating of the fastening ends 13 of the tufts of bristles on the rear side of the head region 34 of the partial brush body 2 or the bristle-carrying part, this basic body is completed and in this case a part back is particularly applied by injection.
    The injection molding device can be configured with a multi-station tool for injecting the partial brush bodies 2 into a first injection station as well as for injecting the coatings covering the fastening ends 13 of the tufts of bristles. in another injection station.
    The back portion may be made of elastic material such as rubber, for example TPE. If the same material is used for the back part as for the partial brush body 2, therefore polypropylene (PP), care must be taken when heating the fastening ends 13 of the tufts of bristles 1 as the gases and aerosols generated do not settle on the partial brush body 2 and prevent or even limit an intensive connection with the back part.
    In the heating station 20 to form thickenings 19 at the attachment ends 13 of the tufts of bristles 1, provision may additionally be made for a device for preventing deposition of gases and aerosols on the surface of the partial bodies, in particular a gas suction device.
    As already mentioned, in the embodiment there is shown a partial body 2 of a toothbrush with a head region 34 having through-holes 17 and with a handle 35 thereafter. This first partial body 2 is then still coated by injection with a brush head back serving as a second partial body.
    But it is also possible that the first partial body is a bristle-carrying piece that can be connected to a brush handle and thus has connection areas for the brush handle or the two separate parts are connected together in particular by molding by injection. The bristle-carrying portion may also be part of a plug-in brush of a (electric) hand-held device. In these embodiments, a second partial body for fixing the tufts of bristles is also injected during a second injection process. Other injection processes may be provided for additional regions of the brush.
    The back of the brush head formed by the second partial body may be profiled so that, when elastic material is used as rubber for the second partial body, it may be used as a cleaning tool in the cavity oral. The profiling of the back of the brush head can also extend on the lateral longitudinal edges.
    In addition, the profiling of the back of the brush head can also be provided to increase the flexibility and be formed in particular by transverse grooves on the outside.
    权利要求:
    Claims (23)
    [1]
    2. Method according to claim 1, characterized in that the cassette (15) with the partial brush body (2) lined with tufts of bristles (1) therein is placed in a recess (40) of the molding mold by injection for the cassette (15) and is, if necessary, placed above these ends of tufts of hair that protrude.
    [2]
    3. Method according to claim 1 or 2, characterized in that the cassette (15) is used as a piece giving a shape during the injection of the partial brush body (2).
    [3]
    4. Method according to claim 3, characterized in that the tuft receiving holes (16) of the cassette (15) are closed by closure elements during the injection of the partial brush body (2), preferably by hole pins for the through holes (17) of the partial brush body (2).
    [4]
    5. Method according to any one of claims 1 to 4, characterized in that the tufts of bristles (1) in the through holes (17) of the partial brush body (2) are positioned with the ends of attachment (13) on the rear side at a distance from the partial brush body (2), are thickened in this position and are then connected, if necessary, to the partial brush body (2).
    [5]
    6. Method according to any one of claims 1 to 5, characterized in that the fastening ends (13) of the tufts of bristles (1) are melted and, where appropriate, discharged for thickening.
    [6]
    7. Method according to any one of claims 1 to 6, characterized in that the fastening ends (13) thickened tufts of bristles (1) are pressed sealingly against the edges of the passage holes (17) of the body partial brush (2).
    [7]
    8. Method according to any one of claims 1 to 7, characterized in that during the injection coating of the fastening ends (13) thickened, the sealing elements (18) surrounding the tufts of bristles (1) are deformed.
    [8]
    9. Method according to any one of claims 1 to 8, characterized in that tufts of bristles (1) prefabricated, in particular treated at the ends useful and cut, if necessary, the fixing ends (13) are brought to to the partial brush body (2) -
    [9]
    10. Method according to any one of claims 1 to 9, characterized in that during the injection coating of the ends of attachment (13) of tufts of bristles, a back portion is applied by injection on the partial brush body (2).
    [10]
    11. Method according to any one of claims 1 to 10, characterized in that the partial brush body (2) provided with through holes (17) is lined in whole or in part with tufts of bristles (1), where appropriate, different.
    [11]
    12. Method according to claim 11, characterized in that at a partial lining of the passage holes (17) of the partial brush body (2) with tufts of bristles (1), at least a portion of the through holes (17) free are traversed by the injected material during the injection coating of the fastening ends (13).
    [12]
    Apparatus for making brushes with tufts of bristles (1) coated by injection, the device having at least one injection molding device for the brush bodies and a tufts lining device (31) for filling the partial brush bodies (2) with tufts of bristles (1), in particular for implementing the method according to one of claims 1 to 12, characterized in that it has at least one cassette (15) forming a support piece for one or more partial brush bodies (2), which can be positioned together with the one or more partial brush bodies (2) near the pile tufting device (31) for filling partial brush bodies (2) with tufts of bristles (1) and in that the injection molding device has an injection tool with a recess (40) for placing the cassette (s) provided with ) of at least one partial brush body (2 ).
    [13]
    14. Device according to claim 13, characterized in that the (the) cassette (s) (15) has (nt) tuft receiving holes (16) aligned on the passage holes (17) of the partial brush body (2).
    [14]
    Device according to claim 13 or 14, characterized in that a support device (37) is provided for retaining the one or more partial brush bodies (2) in the cassette (15).
    [15]
    16. Device according to one of claims 13 to 15, characterized in that a handling device is provided at least to bring the (the) cassette (s) packed (s) partial brush bodies (2) up to to the injection tool of the injection molding device.
    [16]
    17. Device according to one of claims 13 to 16, characterized in that the cassette (15) is provided as a part giving a shape during the injection of the partial brush body (2) and in that the molding device by injection is preferably configured with a multi-station tool at least for the injection of partial brush bodies (2) as well as for the injection of coatings covering the fastening ends (13) of the tufts of bristles (1) .
    [17]
    18. Device according to one of claims 13 to 17, characterized in that it has, upstream of the pile tufting device (31), a supply of bristle material for hair material cut to length, preferably treated at one end, with subsequent tuft splitting.
    [18]
    19. Device according to one of claims 13 to 18, characterized in that the supply of bristle material (30) has a transfer device for placing the tufts of bristles (1) in a filling plate (4) provided of holes (5) corresponding approximately to the bristle area of the completed brush, which plate can be positioned flat against a cutting plate (7) also provided with holes (8) for transferring the tufts of bristles (1) thereon cutting plate (7).
    [19]
    20. Device according to claim 19, characterized in that the cutting plate (7) can be positioned near a profiling device for profiling or contouring the useful ends (12) of the tufts of bristles (1) and in that at least one cutting knife (14) is provided for cutting the tufts of bristles (1) at their attachment ends (13).
    [20]
    21. Device according to one of claims 13 to 20, characterized in that a heating station (20) is provided to form thickenings (19) at the ends of attachment (13) tufts of bristles (1) set square.
    [21]
    22. Device according to one of claims 13 to 21, characterized in that the tuft receiving holes (16) of the partial body cassettes (15) are provided with transition formations of the individual holes of the cutting plate (7). ) to the holes with a cross-sectional shape deviating from a round shape, for example to the oblong shaped holes of the partial brush bodies (2).
    [22]
    23. Device according to one of claims 13 to 22, characterized in that there is provided a device for preventing deposition of gas and aerosols on the surface of the partial bodies, in particular a gas suction device, near the heating station (20) to form the thickenings (19) at the attachment ends (13) of the tufts of bristles (1).
    [23]
    24. Device according to one of claims 13 to 23, characterized in that tuft receiving holes (16) of the cassette (15) for partial body which are in the extension of passage holes (17) unfilled of the partial brush body (2) are configured as blind holes, in particular for the formation of cleaning and massage elements.
    类似技术:
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    同族专利:
    公开号 | 公开日
    DE102006051356A1|2008-05-08|
    引用文献:
    公开号 | 申请日 | 公开日 | 申请人 | 专利标题
    DE19515294A1|1995-04-26|1996-10-31|Zahoransky Formenbau Gmbh|Machine making toothbrush which separates injection moulding from bristle preparation|
    DE19943599A1|1999-09-11|2001-03-15|Zahoransky Anton Gmbh & Co|Brush manufacturing machine has mould halves, one of which, contains cassette with channels into which ends of bundles of bristles are inserted for bonding together by injection molding and which is fitted with sealing plate|
    JP2003061754A|2001-08-24|2003-03-04|Kao Corp|Method and device for manufacture of brush|
    JP2003135147A|2001-08-24|2003-05-13|Kao Corp|Method of manufacturing toothbrush|
    JP2003102552A|2001-09-28|2003-04-08|Sunstar Group Engineering Inc|Method for manufacturing toothbrush|
    DE10235642A1|2002-08-02|2004-02-19|Zahoransky Formenbau Gmbh|Plastic toothbrush manufacture involves injection molding of bristles with a base and transfer to another station for injection of brush bodies|
    EP3033966B1|2014-12-19|2020-08-26|M+C Schiffer GmbH|Brush and method for its production|
    法律状态:
    2020-08-06| MM| Lapsed because of non-payment of the annual fee|Effective date: 20190930 |
    优先权:
    申请号 | 申请日 | 专利标题
    DE102006051356|2006-10-31|
    DE200610051356|DE102006051356A1|2006-10-31|2006-10-31|Brush manufacturing method, involves fitting brush partial body with bundles, and inserting partial body together with cartridge into spraying mold, where partial body is taken supplementarily or completing squirting|
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