• 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 brush making machine (1) has a first injection molding machine (18) for locally injecting tufts of bristles (7) held in cassettes (9) and for forming a bristle support (19) connecting the tufts of bristles (7) as well as a second injection molding machine (24) in which the brush holder (19) can be placed and can be coated by injection to form a brush body (25) or a partial brush body. The first injection molding machine (18) is designed to form a thin-walled wafer as a bristle carrier (19) and has a shorter cycle time than the second injection molding machine (24). At least the second injection molding machine (24) is designed as a multiple injection molding machine and has a multiple of the number of mold cavities of the first injection molding machine (18). (figure 1).
    公开号:BE1019099A3
    申请号:E2009/0607
    申请日:2009-10-06
    公开日:2012-03-06
    发明作者:Winfried Ebner
    申请人:Zahoransky Ag；
    IPC主号:
    专利说明:

    The invention relates to a machine for manufacturing brushes comprising a first injection molding machine for locally coating the tufts of bristles held in cassettes in places and for forming a bristle support connecting the tufts of bristles. bristles and a second injection molding machine in which the bristle carrier can be placed and injection-coated to form a brush body or a partial brush body.
    In the manufacture of brushes in which the bristles are not inserted into the brush body but in which the tufts of bristles are plastic injection-coated in the region of the brush body and thus are held on the brush body, the problem lies in the fact that during the injection molding of the brush body, liquid plastic material is pushed upwardly through the individual filaments of the brush tufts or on the edge of the tufts due to the injection pressure high and that this excess plastic material is then visible on the surface of the brush and that the brush is then unusable /
    To solve this problem, various devices and methods are already known. For example, it is possible to melt the tufts of bristles at their attachment side to thereby connect the individual fibers to one another and to thicken the melt end.
    Document EP 1 110 478 discloses a method in which the ends of tufts of bristles advancing in a mold cavity are first coated by injection with a plastic component and the bristle carrier thus formed is then transferred into another mold cavity in which the brush body is injection molded and, in doing so, the bristle carrier is injection-coated and thus becomes a part of the brush body. The bristle carrier can, in doing so, be injection molded with a lower injection pressure, thereby avoiding an overflow of the injected material in the region of the tuft of bristles.
    Injection molding machines are generally designed with multiple mold cavities to simultaneously injection mold a plurality of brush bodies, often by multiple mold cavities. The tufts of bristles are in this case held in cassettes, the cassettes being generally designed as multiple cassettes depending on the number of multiple mold cavities. Such multiple cassettes need to be produced very precisely, particularly with respect to the position of the tufa holes, and are therefore expensive, the accuracy requirements increasing as the cassettes are larger.
    The injection molding machine itself can be designed as a multiple injection machine with several injection units to be able to inject one after the other several plastic components, for example a basic brush body with a partial injection coating of color. When the first and second injection molding machines are joined in such a multiple injection machine, three injection units are required for the bristle carriers, the brush base bodies and the injection coating. Such multiple injection machines are very complex and expensive, the costs depending in particular on the number of injection units and hence on the number of mold cavities to be made very precisely, which is identical for each of the regions of the invention. partial injection.
    Since the cassettes after having been filled with the bristle material are often still routed to treatment stations, for example for profiling, polishing and rounding the free ends of the bristles, and are then inserted one after the other. the others in the mold cavities of the injection molding machine, a plurality of cassettes are required. Cassettes are thus an essential cost factor for such brush making machines.
    Therefore, the problem is to provide a brush-making machine of the type mentioned at the beginning which allows a precise and reliable injection molding of the brush bodies and which is nevertheless of advantageous price.
    The solution according to the invention to this problem is that the first injection molding machine is designed to form a thin-walled wafer as a bristle carrier and has a shorter cycle time than the second injection molding machine and in that at least the second injection molding machine is designed as a multiple injection molding machine and has a multiple of the number of mold cavities of the first injection molding machine.
    Several injection cycles for the brush holders can be performed in the first injection molding machine during the injection cycle of the second injection molding machine. It is therefore possible to use smaller cassettes which are collected, after injection of the bristle carrier, into the first injection molding machine and are inserted per group into the second injection molding machine to inject the brush body. Due to the different cycle times, the treatment is possible without loss of time compared to the injection in the various injection molding machines with multiple cassettes as in the state of the prior art known. At the same time, the smaller cassettes of the injection molding machine according to the invention are significantly cheaper to manufacture so that the entire brush making machine is of a lower cost. This cost advantage is even more noticeable when the brush making machine is to be used with different bristle area patterns for the production of different types of brush and depending on the type of brush, different cassettes are needed.
    Multiple injection machines for manufacturing a brush body from a plurality of injection components also have a cost advantage, since the injection of the bristle carrier takes place separately in the first machine. injection molding and that in the second injection molding machine designed as a multiple injection machine, only the mold cavities still need the injection components of the brush body, so a less injection component than in previously known brush making machines.
    In order to achieve an optimal ratio between the cycle times of the individual injection molding machines and the size of the cassettes which determines the costs for the individual cassettes, it is advantageous that the second injection molding machine is designed as a molding machine. by multiple injection with 16 mold cavities and that the first molding machine is designed as a multiple injection molding machine with four or eight mold cavities. The cassettes can thus be designed as a quadruple cassette or an eightfold cassette, which significantly reduces manufacturing costs compared to a hexadecouple cassette. In the first injection molding machine with an eightfold mold, it is also possible to use quadruple cassettes which are each inserted in pairs. In addition, the handling and transport of smaller cassettes are simpler, which also allows a simpler and cheaper assembly of the entire machine for making brushes.
    Because the injection pressure of the first injection molding machine is lower, it may be possible to omit melting the ends of the tufts before injection of the bristle carrier. It is preferred, however, to interpose also in the brush making machine a device for melting the ends of the tufts of bristles before the first injection molding machine.
    So that even with injection-molded hair tufts ends, the bristle support surrounding them can be made as thin as possible, it is appropriate that a device for flattening the fused ends of the tufts of bristles is associated with the device for melting the ends of tufts of bristles or is placed after it. The more the bristle carrier is flat, the more the entire brush head will be flat, brush head which is formed by injection coating the bristle carrier into the second injection molding machine.
    To obtain good hold between the bristle carrier and the plastic material injected around it in the second injection molding machine, it is appropriate for the first injection molding machine to be designed to form a profiled surface of the injection molding machine. fur. The bristle carrier may then be provided with splines, grooves or undercuts to provide a better etching surface for the plastic material injected into the second injection molding machine.
    In general, steel cassettes are used because they are strong and durable. In particular situations, for example for small series for which a long life of the cassettes does not matter, they can however also be made of plastic. It is also possible to provide individual plastic cassettes which are designed as a tamper-proof closure. These remain on the tufts of hair and are removed by the user only immediately before the first use.
    The brush making machine suitably has a packing device for the cassettes as well as a plurality of successive processing stations for treating the tufts of bristles held in the cassettes. The lining device may be an insertion machine, or the bristle material is guided on reels, bunched and cut to length. After packing the cassettes, the tufts of hair can be rounded, polished and profiled. After profiling, the ends opposite the useful ends of the bristles are cut to a uniform level to melt and coat them by injection into the first injection molding machine.
    For simple handling of the cassettes, it is advantageous that there is provided between the first and the second injection molding machine a device for removing the cassettes of the first injection molding machine, to collect the removed cassettes as well as for the group and transfer them to the second injection molding machine. The cassettes with the bristle carriers, cassettes injected during a shorter cycle time, can thus be collected and kept ready until the second injection molding machine is ready, after its treatment cycles, to receive the collected cassettes according to the number of existing mold cavities.
    A device for applying an identification mark on the bristle carrier may also be provided between the first and the second injection molding machine. This identification mark is then coated by injection into the second injection molding machine so that it is no longer visible on the completed brush. This allows, for example, to have a hidden proof of authenticity. In case of doubt, the brush can be cut and the absence of the identification mark can prove plagiarism. The identification mark can also be an RFID transponder. This can be used, for example, for formal identification of each individual brush or as protection against theft by triggering an alarm device.
    To further automate the manufacturing process, it is appropriate that a removal device for the injection-molded brush bodies and one or more after-treatment devices be placed after the second injection molding machine. The injection molded brushes may be conveyed by the removal device either directly to a subsequent treatment device or transferred to a transport device with which they are transported to the further processing device. As subsequent processing devices, it is possible to envisage, for example, devices for marking the brushes, for example with date, series or type mention, automatic or manual control stations, devices for removing the cassettes and / or packaging devices.
    The cassettes are used, after removal of finished brushes, to make another brush. To obtain a closed circuit for transporting the cassettes, a return device for transporting the cassettes removed from the completed brushes may be provided on the packing device.
    To compress the tufts of bristles, a transfer device may be provided on the lining device for transferring the tufts of bristles from one lining cassette into another cassette with a smaller hole diameter.
    The transfer can be particularly simple when the packing cassette has passage openings for the tuft of bristles and when the transfer device has rods to be introduced into the passage openings. In this case, the stems may be profiled for the tuft of bristles at their active ends to thereby profile the individual tufts of hair during the transfer.
    An exemplary embodiment of the machine for manufacturing brushes according to the invention will be explained in more detail below on the basis of the drawing which shows more schematically on:
    Fig. 1 a brush making machine with an insertion device, a plurality of processing stations, a first and a second injection molding machine and subsequent processing devices,
    Fig. 2 a top view of a quadruple cassette,
    Fig. 3 a section through the cassette along the line III - III in Figure 2,
    Fig. 4 an injection mold of the first injection molding machine with a cassette lined with tufts of bristles, and FIG. A sectional representation of a completed brush.
    A brush-making machine designated in its entirety by 1 is shown in FIG. 1, an insertion device 2 with a stock of bristles 3, a tuft splitter 4 and an insertion tool 5 as a packing device for cassette cassettes. 6. After the complete packing of the packing cassette 6 with tufts of bristles 7, the packing cassette 6 is brought into a transfer position (arrow Pf1) in which the tufts of bristles 7 are transferred to another cassette 9 by means of a transfer device 8. This cassette 9 may have a smaller hole diameter for the tufts of bristles 7 so that the tufts of bristles 7 are compressed during the transfer. The transfer device 8 has rods 10 to be introduced into the passage openings of the packing cassette 6. The tufts of bristles 7 are pushed with these rods 10 out of the passage openings of the packing cassette 6 into the passage openings. 27 (Figures 2, 3) of the casettes 9. After the transfer of the tufts of bristles 7 in the cassette 9, the packing cassette 6 is brought back to the insertion tool 5 (arrow Pf2) and can be filled again. Due to the use of several packing cassettes 6, another packing cassette 6 can already be filled with tufts of bristles during the transfer of the tufts of bristles into a cassette 9, which makes it possible to accelerate the processing time .
    In the embodiment shown, the cassettes 9 are each quadruple cassettes, the four sections for the individual brushes being arranged next to each other in the plane of the drawing according to FIG. 1 and each having a row of oriented tufts. transversely to the plane of the drawing (see also Figure 2).
    The cassettes 9 filled with tufts of bristles 7 are conveyed along a transport device 11 to several treatment stations 12a, b, c. In a first treatment station 12a, the bristle ends are rounded, in a second treatment station 12b, the bristle ends are profiled and in an additional treatment station 12c, the ends of the profiled bristle area are cut at the same length.
    In a removal station 13, the cassettes 9 are transferred (arrow Pf3) into a device 14 to melt the ends of the tufts of bristles. In the device 14, the rods of a rod plate 16 are inserted into the tufts holes of the cassette 9 to push out of the cassette 9 the ends of the tufts of bristles 7 which are then subjected to the action of a heating plate 17 and doing melted.
    The cassette 9 is then conveyed to a first injection molding machine 18 in which the tips of the fused pile tufts 15 of each hair zone are injection-coated to form a thin-walled thin plate as a bristle carrier 19. The cassette 9 is for this purpose inserted between two mold halves 20a, b of the first injection molding machine 18 so that the ends of the melt tufts 15 project into mold cavities 21 of the first mold half 20a. (see Figure 4) and can be coated by injection.
    After the injection of the bristle supports 19, the cassette 9 is removed from the first injection molding machine 18. Several cassettes 9 thus treated are collected in a collection place 22 and are then placed together in a multiple mold 23 of A second injection molding machine 24. Here, the brush bodies 25 for the individual brushes 26 (Figure 5) are injection molded, in that the bristle carriers 19 are injection-coated.
    For injection of the bristle carrier 19 into the first injection molding machine 18, only a short cycle time is required so that during an injection cycle of the second injection molding machine 24, it is possible to process in the first injection molding machine 18 at least the number of cassettes 9 to be placed in the second injection molding machine 24. It is thus possible to use, without loss of time, cassettes 9 plus small and therefore less expensive, a corresponding number can then be placed in the multiple mold of the second injection molding machine. In the exemplary embodiment shown in FIG. 1, two quadruple cassettes 9 are used in an eight-fold mold of the second injection molding machine 24. But the second injection molding machine 24 may also have a hexadecuple mold in which four quadruple cassettes 9 can then be placed.
    After removal of the cassettes 9 with the molded brush bodies of the second injection molding machine 24 (arrow Pf4), these are conveyed to further further unrepresented processing devices (arrow Pf5) where a Stamp or engraving can be applied on the brush body, a brushes control is carried out to detect errors or special treatments are carried out. Finally, the completed brush is ejected from the cassette (arrow Pf6) and the empty cassette 9 is returned to the transport device 11 (arrow Pf7).
    As is clear from the representation according to FIG. 1, a plurality of cassettes 9 is circulating inside the brush making machine 1. Since small cassettes, for example quadruple cassettes, are cost significantly more advantageous than larger cassettes, for example octuples cassettes or hexadecuples cassettes, there is a clear cost advantage over previously known brush making machines which operate with larger cassettes of this type. type. The different cycle times of the first and the second injection molding machine do not, however, have any disadvantage with regard to the processing time.
    权利要求:
    Claims (15)
    [1]
    A brush making machine (1) comprising a first injection molding machine (18) for locally coating tufts of bristles (7) held in cassettes (9) and forming a bristle carrier (19). ) connecting the tufts of bristles (7) and a second injection molding machine (24) in which the brush holder (19) can be placed and can be injection-coated to form a brush body (25) or a partial brush body, characterized in that the first injection molding machine (18) is designed to form a thin-walled wafer as a bristle carrier (19) and has a shorter cycle time than the second molding machine by injection (24), and in that at least the second injection molding machine (24) is designed as a multiple injection molding machine and has a multiple of the number of mold cavities of the first molding machine. injection (1 8).
    [2]
    Brush making machine according to claim 1, characterized in that the second injection molding machine (24) is designed as a multiple injection molding machine with 16 mold cavities and the first injection molding machine ( 18) is designed as a multiple injection molding machine with four or eight mold cavities.
    [3]
    3. Brush making machine according to claim 1 or 2, characterized in that a device (14) for melting the ends (15) of the tufts of bristles is placed before the first injection molding machine (18).
    [4]
    4. Brush making machine according to any one of claims 1 to 3, characterized in that a device for flattening the fused ends of the tufts of bristles is associated with the device (14) for melting the ends of tufts of hair or is placed after this one.
    [5]
    A brush making machine according to any one of claims 1 to 4, characterized in that the first injection molding machine (18) is adapted to form a profiled surface of the bristle carrier (19).
    [6]
    6. Brush making machine according to any one of claims 1 to 5, characterized in that the cassettes (9) consist of steel.
    [7]
    Brush making machine according to one of Claims 1 to 5, characterized in that the cassettes (9) consist of plastics material.
    [8]
    8. Brush making machine according to any one of claims 1 to 7, characterized in that the cassettes (9) are designed as tamper-proof closures.
    [9]
    Brush making machine according to one of Claims 1 to 8, characterized in that the brush-making machine (1) has a packing device for the cassettes as well as a plurality of treatment stations (12a, 12b, 12c) arranged one after the other to treat the tufts of hair (7) retained in the cassettes (9).
    [10]
    Brush making machine according to one of claims 1 to 9, characterized in that between the first and the second injection molding machine there is provided a device for removing the cassettes (9) from the first injection molding machine (18) for gathering the removed cassettes (9) as well as for grouping and transferring them into the second injection molding machine (24).
    [11]
    Brush making machine according to one of Claims 1 to 10, characterized in that between the first and the second injection molding machine there is provided a device for applying an identification mark to the support. of hair (19).
    [12]
    A brush making machine according to any one of claims 1 to 11, characterized in that a removal device for the injection molded brush bodies (25) and one or more subsequent treatment devices is placed after the second injection molding machine (24).
    [13]
    Brush making machine according to one of claims 1 to 12, characterized in that a return device for transporting the cassettes (9) removed from the finished brushes (26) is provided on the packing device.
    [14]
    Brush making machine according to one of Claims 1 to 13, characterized in that a transfer device (8) for transferring the tufts of bristles (7) from a packing cassette (6) into a Another cassette (9) with a smaller hole diameter is provided on the packing device.
    [15]
    Brush making machine according to one of Claims 1 to 14, characterized in that the packing cassette (6) has openings for the tufts of bristles (7) and that the transfer device (8) has rods (10) to be introduced into the passage openings.
    类似技术:
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    FR2697235A1|1994-04-29|Method and device for conveying objects along a circuit and use of this device.
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    FR3060956A1|2018-06-29|COSMETIC PRODUCT APPLICATOR HAVING ORIFICES
    BE1014314A3|2003-08-05|Machine for making body brush or brushes multicomponent.
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    法律状态:
    优先权:
    申请号 | 申请日 | 专利标题
    DE102008057546|2008-11-08|
    DE102008057546.1A|DE102008057546B4|2008-11-08|2008-11-08|Brush manufacturing machine|
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