• 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:
    According to a method of manufacturing a toothbrush (1), provision is made to rectify, before rounding, the free tips (8) of the filaments (3,5,6,7) of the toothbrush (1 ) which are provided with oblique cutting surfaces (9) to obtain the desired profile shape (4).
    公开号:BE1019358A3
    申请号:E2010/0337
    申请日:2010-06-03
    公开日:2012-06-05
    发明作者:Michael Rich
    申请人:Zahoransky Ag；
    IPC主号:
    专利说明:

    The invention relates to a method of manufacturing a brush with filaments which are attached to a brush body, the filaments being cut to size in a desired profile shape with a milling cutter and the free ends of the filaments being rounded, after cutting to size, during a grinding treatment.
    The invention also relates to a device for manufacturing a brush with filaments, a milling cutter for dimensionally cutting the filaments in a desired profile shape and a first grinding unit for rounding the free ends of the cut-to-size filaments being provided.
    Such methods and devices are used in particular for the manufacture of toothbrushes for rounding the free ends of the bright-edged filaments due to the cut to size in order to avoid as much as possible of hurting the gum during brushing.
    If the toothbrush is to be made with a shaped shape in which the free points of the filaments describe more or less steep ascents or descents, it is generally difficult to achieve a good rounding quality for these tips of filaments.
    It is therefore an object of the invention to provide a method and a device for producing a brush with filaments, which achieve a good rounding quality even for the manufacture of toothbrushes with a profiled surface.
    To achieve this purpose, it is provided for the method described at the beginning that, before rounding, the oblique cutting surfaces on the free ends of the filaments are ground by further treatment by grinding. In general, rectification is understood to mean approximating the oblique cutting surface imposed by the profile shape of a plane perpendicular to the extension direction of the filaments by removal of portions of the free peaks protruding from this imaginary plane. final surface of the resulting filaments should not itself be flat but can also, for example, be curved.
    The invention makes use of the fact that the difficulties in rounding the free ends of the filaments arise from the fact that the filaments are cut obliquely to produce the profiled surface and can therefore have sharp edges which make difficult a semi-spherical symmetrical rounding. . It has been found that the bevel in the rounding of obliquely cut filaments remains as a rule visible. The invention has the advantage that the bevel is essentially eliminated by the intercalated processing step so that a semispherical tip can be formed on the filaments by the following rounding.
    It has been found advantageous that the additional grinding treatment is carried out at a high grinding speed, thus at a high speed of relative movement between the filament tip and the grinding wheel. For example, the additional treatment by grinding can be performed at a grinding speed which is twice that of the grinding treatment for rounding.
    Good results are obtained when the additional grinding treatment is carried out at a grinding speed which results in thermal grinding of the filaments. Alternatively or additionally, it may be provided that the further grinding treatment is performed with an abrasive material which results in thermal grinding of the filaments. Due to the thermal deformation of the filament material, which occurs during thermal grinding, particularly sharp edges are eliminated.
    An easily achievable configuration of the invention may provide that the additional grinding treatment is performed with the flat side of a grinding wheel.
    It is particularly advantageous that the wheel performs in addition to its rotation a planetary movement during the grinding treatment. What is advantageous in this case is that the filaments are thus treated on all sides and that a symmetrical grinding is obtained. Planetary movement is generally understood to mean rotation around an axis which is guided on its side, during rotation, in another rotational or pivotal movement about at least one other axis.
    Optimum conditions for the following rounding are achieved when the additional treatment by grinding produces a curved end surface on the free tips of the filaments.
    When all the filaments have surfaces located horizontally and at an angle to the longitudinal axis of the filaments when these filaments are oriented vertically, it is generally possible to obtain, in the next normal grinding operation, the rounding according to what is desired, semi-spherical ends or ends with a straight surface around the central point and more or less rounded edges.
    To now process the beveled filaments, it may be expected that during the further grinding treatment, longer filaments, especially straight cut filaments, are forced back for the treatment of shorter filaments. For this purpose, filament delivery devices are preferably used.
    If the difference in height between the longest and the shortest filaments in a brush is very large, it can be expected that the rectification takes place in two stages of work. For example, it may be provided that the longer, bevel-cut filaments are first treated and that, preferably, the shorter filaments are treated with another grinding wheel, the longer filaments already treated previously being repressed for to do.
    In this way, the additional grinding treatment is achieved in at least two operations, the filaments having a length in a predetermined length range being processed in each operation.
    To prevent the filaments during the further treatment by grinding from moving away from the grinding wheel by bending in a predominant direction which may be given by the direction of rotation of the grinding wheel, which would have the effect that the grinding would not be completely carried out and If only a cutting surface which is still oblique is obtained, it may be provided that the additional treatment by grinding is carried out with two grinding wheels which operate in opposite directions to one another. These wheels can work and apply on the filaments simultaneously or successively.
    According to one embodiment of the invention, it may be provided that the additional treatment by grinding is carried out with at least one grinding wheel, the grinding wheel being guided during the further treatment by grinding in a lifting movement in the longitudinal direction of the filaments. Lifting movements are preferably carried out in the longitudinal direction of the filaments, but it is also possible advantageously to provide lifting movements which move away from it and which are oriented only approximately in the longitudinal direction and therefore run obliquely to the direction longitudinal as the lifting movement away from the filaments has the effect of an at least partial discharge of the filaments with which the wheel comes into contact. It is advantageous in this case that the filaments can again, during the treatment by grinding, recover vertically or recover from a curved position imposed by the action of the grinding treatment so that a cutting surface also straight as possible can be formed. Due to the lifting movement, the filaments are thus briefly discharged and even released during the grinding treatment and can return to their relaxed position. A lifting length of less than 1 mm and even less than 0.5 mm or of the order of 1/10 mm is preferably used.
    To achieve the stated purpose, there is provided for the device described at the beginning at least one additional grinding unit which is designed to grind bevel cutting surfaces on the free ends of the size cut filaments.
    A preferred embodiment may provide that said at least one additional grinding unit has a grinding wheel which has on its flat side abrasive material.
    Symmetrical grinding is achieved when the at least one additional grinding unit has a drive unit which, during grinding, also executes a planetary movement. It is particularly advantageous for said at least one additional grinding unit to be shaped like a grinding wheel.
    If only the beveled filaments are to be processed and not the longer filaments which have been cut parallel or only slightly obliquely in the upper region, a pressure element which is designed to force longer filaments during the grinding of the filaments more short can be expected.
    In one configuration of the invention, it can be provided that said at least one additional grinding unit has at least two wheels that can be driven in opposite directions. The grinding unit can be configured for simultaneous and / or time-shifted operation of the grinding wheels.
    It may be alternatively provided that two additional grinding units each have a grinding wheel, the grinding wheels being drivable in opposite directions to each other.
    For the subsequent treatment during rounding, it is possible to obtain particularly suitable ground rectified cutting surfaces when the at least one additional grinding unit has a lifting device with which a lifting movement of the grinding unit or The grinding wheel can be made in the longitudinal direction of the filaments during grinding. The lifting device is preferably designed in such a way that the lifting movement can be and is performed as a back and forth movement, for example a periodic movement in time.
    The invention will now be described in more detail on the basis of an exemplary embodiment but is however not limited to this embodiment. Other exemplary embodiments result from the combination of the features of the claims taken separately from each other and / or with individual features or several features of the exemplary embodiment.
    It is shown in a highly schematized representation on FIG. 1 a side view of the front end of a toothbrush,
    Fig. 2 in a side view, a single filament cut obliquely,
    Fig. 3 the filament according to Figure 2 after the rectification and
    Fig. 4 the filament according to Figure 3 after rounding.
    Figure 1 shows, in a diagrammatic representation, the front distal end of a brush designated in its entirety by 1, which is configured as a toothbrush.
    The brush 1 has on its brush body 2 a liner with filaments 3 which have been cut to size in the desired profile shape 4 with a not shown cutter.
    The shape of profile refers to the envelope surface described by the free points of the cut-to-size filaments.
    Because of the profile shape 4, the individual filaments 3 have lengths strongly differing from each other.
    The selected profile shape 4 also implies that the filaments 5 and 6 are cut to size with a straight or substantially straight cutting surface, while the filament 7 for example is configured with a cutting surface extending obliquely to in its longitudinal direction.
    FIG. 2 shows, for example, in a side view, this filament 7 which has at its free point 8 an oblique cutting surface 9 which describes a plane which forms, in the plane of the drawing, an angle which is less than 90 ° with the longitudinal axis of the filament 7 standing vertically on the brush body 2 in FIG.
    It can be seen in Figure 2 that a sharp edge 10 is formed on the end of the filament 7 opposite the brush body 2 due to the oblique position of the cutting surface 9. This sharp edge 10 poses difficulties when of a subsequent borough.
    Therefore, according to the invention, the free point 8 of the filament 7 is ground during a processing process performed before rounding, which gives the situation according to FIG. 3. In doing so, the sharp edge 10 protruding from the final surface 11 (see Figure 2) is removed with the material of the filament 7 which is contiguous.
    A rectified final surface 11 which has rotational symmetry with respect to the longitudinal axis of the filament 7 is thus formed at the free end 8 of the filament 7 by the intermediate grinding treatment according to the invention. The final surface 11 may be planar or slightly domed upwards.
    The final ground surface 11, however, always has on its edge a sharp peripheral edge 12 which will be ground during the rounding process that follows.
    This results in the completed form of the filament 7 shown in Figure 7 with a rounded tip 13 in the shape of a half-sphere. Depending on the choice of the radius of curvature of the rounded formed, it is however also possible to obtain other forms in which the sharp edge 12 according to Figure 3 is not ground to the center of the final surface 11 corrected so that a straight surface with a rounded peripheral ridge at the free point 8 is obtained.
    According to the method of manufacturing a toothbrush 1, it is intended to rectify before rounding the free ends of the filaments 3, 5, 6, 7 of the toothbrush 1 which are provided with oblique cutting surfaces 9 to obtain a desired profile shape 4.
    权利要求:
    Claims (17)
    [1]
    A method of manufacturing a brush (1) with filaments (3, 5, 6, 7) which are attached to a brush body (2), the filaments (3, 5, 6, 7) being cut to dimension according to the desired profile shape (4) with a milling cutter and the free ends (8) of the filaments (3, 5, 6, 7) being rounded after dimension cutting by a grinding treatment, characterized in that, before rounding, oblique cutting surfaces (9) on the free ends (8) of the filaments (3, 5, 6, 7) are ground by further grinding treatment.
    [2]
    2. Method according to claim 1, characterized in that the additional treatment by grinding is carried out at least at a grinding speed which is twice that of the grinding treatment for rounding.
    [3]
    Method according to Claim 1 or 2, characterized in that the additional grinding treatment is carried out at a grinding speed and / or with an abrasive material which has (for) the effect of thermal grinding of the filaments (3, 5, 6, 7).
    [4]
    4. Method according to any one of claims 1 to 3, characterized in that the additional treatment by grinding is performed with the flat lateral side of a grinding wheel.
    [5]
    5. Method according to any one of claims 1 to 4, characterized in that the wheel performs in addition to its rotation a planetary movement during the grinding treatment.
    [6]
    6. Method according to any one of claims 1 to 5, characterized in that the additional treatment by grinding produces a curved end surface (11) on the free ends (8) of the filaments (3, 5, 6, 7). ).
    [7]
    Method according to one of Claims 1 to 6, characterized in that during the further grinding process, longer filaments (5, 6) are discharged for the treatment of shorter filaments (7).
    [8]
    8. Method according to any one of claims 1 to 7, characterized in that the additional treatment by grinding is performed in at least two operations, the filaments (3, 5, 6, 7) whose length is in a range of predefined length being processed during each operation.
    [9]
    9. Method according to any one of claims 1 to 8, characterized in that the additional treatment by grinding is performed with two grinding wheels which operate in opposite directions to each other, in particular one after the other in time.
    [10]
    Method according to one of Claims 1 to 9, characterized in that the additional treatment by grinding is carried out with at least one grinding wheel, the grinding wheel being guided in a lifting movement approximately in the longitudinal direction of the filaments (7). during the further treatment by grinding, a lifting length of less than 1 mm, less than 0.5 mm or of the order of 1/10 mm is preferably used.
    [11]
    11. Device for producing a brush (1) with filaments (3, 5, 6, 7), a cutter being provided to cut the filaments (3, 5, 6, 7) according to the profile shape (4 ) and a first grinding unit being provided for rounding the free ends (8) of the size-cut filaments (3, 5, 6, 7), characterized in that at least one additional grinding unit is provided, which is designed to grind oblique cutting surfaces (9) on free spikes (8) cut to filament size (3, 5, 6, 7).
    [12]
    12. Device according to claim 11, characterized in that said at least one additional grinding unit is designed for higher grinding speeds than the first grinding unit.
    [13]
    13. Device according to claim 11 or 12, characterized in that said at least one additional grinding unit has a grinding wheel which has abrasive material on its flat side.
    [14]
    14. Device according to any one of claims 11 to 13, characterized in that said at least one additional grinding unit has a drive unit which further guides the grinding wheel during grinding into a planetary movement.
    [15]
    Device according to any one of claims 11 to 14, characterized in that at least one pressure element is provided which is designed to discharge longer filaments (5, 6) during the grinding of shorter filaments ( 7).
    [16]
    16. Device according to any one of claims 11 to 15, characterized in that said at least one additional grinding unit comprises at least two grinding wheels can be driven in opposite directions or in that two additional grinding units each comprise a grinding wheel. the wheels can be driven in opposite directions.
    [17]
    17. Device according to any one of claims 11 to 16, characterized in that said at least one additional grinding unit has a lifting device with which a lifting movement of the grinding unit or the grinding wheel can be carried out approximately in the longitudinal direction of the filaments (7) during grinding.
    类似技术:
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    同族专利:
    公开号 | 公开日
    DE102009024923A1|2010-12-16|
    CN101919621A|2010-12-22|
    引用文献:
    公开号 | 申请日 | 公开日 | 申请人 | 专利标题
    DE4441985A1|1994-11-25|1996-05-30|Zahoransky Anton Gmbh & Co|Method of manufacturing brushes, esp. toothbrushes|
    EP1449458A1|2003-02-21|2004-08-25|Firma G.B. BOUCHERIE, naamloze vennootschap|Method and device for manufacturing brushes|
    DE102009019451A1|2009-04-29|2010-11-04|Zahoransky Ag|Bristle filaments processing method for e.g. toothbrush, involves applying bristle filaments to free ends, where bristle filaments are shifted in vibration by ultrasonic waves, and mechanically processed by application and vibration|
    DE3820372C2|1988-06-15|1997-07-24|Coronet Werke Gmbh|Method and device for producing bristle goods|
    BE1013319A5|1996-07-05|2001-12-04|Zahoransky Anton Gmbh & Co|Correction device.|
    GB2328148B|1997-08-12|2001-11-07|Boucherie Nv G B|A method of endrounding loose fibres|
    CN2345056Y|1998-09-11|1999-10-27|李刚|Toothbrush|
    DE10212701B4|2002-03-21|2015-05-13|Geka Gmbh|Bristle, method and device for its manufacture, and bristles|
    KR101243431B1|2004-12-09|2013-03-13|라이온 가부시키가이샤|Method of processing tooth brush bristle tip|
    DE102006030413B4|2006-06-29|2016-05-12|Zahoransky Ag|Method and apparatus for making brushes|
    CN201157107Y|2008-01-25|2008-12-03|周之海|Double-face toothbrush|
    法律状态:
    优先权:
    申请号 | 申请日 | 专利标题
    DE200910024923|DE102009024923A1|2009-06-10|2009-06-10|Toothbrush manufacturing method, involves fitting filaments of toothbrush with milling cutter on desired profile form, and straightening diagonal cutting surface at free points of filaments before rounding by additional grinding operation|
    DE102009024923|2009-06-10|
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