EP2337474B1 - Procédé pour produire des brosses, en particulier des brosses à dents - Google Patents

Procédé pour produire des brosses, en particulier des brosses à dents Download PDF

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Publication number
EP2337474B1
EP2337474B1 EP09777899.7A EP09777899A EP2337474B1 EP 2337474 B1 EP2337474 B1 EP 2337474B1 EP 09777899 A EP09777899 A EP 09777899A EP 2337474 B1 EP2337474 B1 EP 2337474B1
Authority
EP
European Patent Office
Prior art keywords
brush body
fiber bundles
flexible material
layer
recess
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Active
Application number
EP09777899.7A
Other languages
German (de)
English (en)
Other versions
EP2337474A2 (fr
Inventor
Bart Gerard Boucherie
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
GB Boucherie NV
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GB Boucherie NV
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by GB Boucherie NV filed Critical GB Boucherie NV
Publication of EP2337474A2 publication Critical patent/EP2337474A2/fr
Application granted granted Critical
Publication of EP2337474B1 publication Critical patent/EP2337474B1/fr
Active legal-status Critical Current
Anticipated expiration legal-status Critical

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Classifications

    • A—HUMAN NECESSITIES
    • A46—BRUSHWARE
    • A46D—MANUFACTURE OF BRUSHES
    • A46D3/00—Preparing, i.e. Manufacturing brush bodies
    • A46D3/06—Machines for both drilling bodies and inserting bristles
    • A—HUMAN NECESSITIES
    • A46—BRUSHWARE
    • A46B—BRUSHES
    • A46B3/00—Brushes characterised by the way in which the bristles are fixed or joined in or on the brush body or carrier
    • A46B3/06—Brushes characterised by the way in which the bristles are fixed or joined in or on the brush body or carrier by welding together bristles made of metal wires or plastic materials
    • A—HUMAN NECESSITIES
    • A46—BRUSHWARE
    • A46B—BRUSHES
    • A46B9/00—Arrangements of the bristles in the brush body
    • A46B9/02—Position or arrangement of bristles in relation to surface of the brush body, e.g. inclined, in rows, in groups
    • A46B9/04—Arranged like in or for toothbrushes
    • A—HUMAN NECESSITIES
    • A46—BRUSHWARE
    • A46D—MANUFACTURE OF BRUSHES
    • A46D3/00—Preparing, i.e. Manufacturing brush bodies
    • A46D3/005—Preparing, i.e. Manufacturing brush bodies by moulding or casting a body around bristles or tufts of bristles
    • A—HUMAN NECESSITIES
    • A46—BRUSHWARE
    • A46B—BRUSHES
    • A46B2200/00—Brushes characterized by their functions, uses or applications
    • A46B2200/10—For human or animal care
    • A46B2200/1066—Toothbrush for cleaning the teeth or dentures

Definitions

  • the invention relates to a method for producing brushes, in particular toothbrushes.
  • a method for making brushes in particular toothbrushes, is known.
  • This brush body are injected, which have a handle, neck and head section.
  • the brush body has several holes for fiber bundles which are inserted into the holes.
  • the fastening ends of the fiber bundles emerging from the holes at the back are melted, so that in each case a melting droplet is formed.
  • some holes in the brush head are not populated with fiber bundles.
  • a soft head back layer is injected on the back side. About the not stocked with fiber bundles holes this head back layer merges into front-side functional elements, which are formed by injection molding and connected to the brush head.
  • a separate head unit and a handle unit separate therefrom can be produced.
  • the soft head back layer is provided here as a connecting material, because it connects the brush head unit with the separate grip unit and represents, so to speak, a kind of elastic bridge.
  • the EP 1 859 705 A1 proposes a method for producing brushes, in particular toothbrushes and a corresponding toothbrush, in which the brush body also represents a unit of head, neck and handle section.
  • a tool-side perforated field plate is equipped with fiber bundles, whereby the projecting from the perforated field plate bundle ends are melted, so that each fiber bundle has a thickened end. All thickened ends are introduced into a cup-shaped recess in the brush head of the brush body by the perforated field plate is placed on the protruding edge of this cup-shaped depression.
  • the perforated field plate also serves as a seal of the bowl-shaped depression, which is then poured out.
  • a soft elastic material is also molded onto the back of the brush body, which has a crenellated edge in the head area. About the wells of this edge, the soft elastic material can flow forward to form functional elements there.
  • the US Pat. No. 6,886,207 B1 shows a similar method in which first the fiber bundles are connected to the head of the brush body. Again, the head of the brush body has a crenellated edge. This crenellated edge is poured through an elastic material that merges into front elastic bristles.
  • a continuous layer of the soft elastic material is formed on the rear side of the carrier plate at the same time as the soft elastic element or a plurality of soft elastic elements is injection molded.
  • This layer of soft elastic material can serve various purposes.
  • the carrier plate is attached to a brush body.
  • the carrier plate with the fiber bundles attached thereto is placed in an injection mold and overmolded to form the brush body.
  • the holes or recesses of the support plate, which are provided for soft elastic elements remain free, and in a subsequent further manufacturing step, the soft elastic mass is injected through the free holes or recesses in an injection mold.
  • a continuous layer of soft elastic material is formed on the back of the brush body. This layer of soft elastic material is integral with the soft elastic elements integrated into the bristle field.
  • the exposed on the back of the brush body layer of soft elastic material may have the function of a tongue cleaner or even give the brush desired optical or haptic properties.
  • the layer of flexible material is also formed on the back side of the carrier plate, but lies directly above the layer of the fused attachment ends of the fiber bundles.
  • the carrier plate with the fiber bundles attached thereto is introduced into an injection mold, and the soft-elastic mass is injected through the holes or recesses of the carrier plate released from the melt.
  • the layer of soft elastic material on the back of the carrier plate covers the fused attachment ends of the fiber bundles and is molded integrally with the pin or plate-shaped, soft elastic elements that are integrated into the bristle field. Subsequently, the carrier plate with attached fiber bundles, soft elastic elements and the layer of soft elastic material is connected to a brush body.
  • the layer of soft elastic material is disposed inside the brush and is not visible to the outside. Their function is to form a perfect seal on the back of the carrier plate.
  • This seal is useful on the one hand in the use of the brush, especially as a toothbrush, as it prevents any ingress of moisture or foreign bodies into the interior of the brush.
  • Particularly useful is the seal through the layer of soft elastic material when the carrier plate is encapsulated to form the brush body in an injection mold with plastic compound. In this process, care must be taken that the injected plastic mass does not penetrate into the bundle holes, resulting in a critical injection pressure. By sealing the bundle holes with the layer of soft elastic material, the injection pressure is easy to control.
  • a method of manufacturing brushes in which the fiber bundles are likewise fastened to a carrier plate by fusing the attachment ends and the carrier plate has at least one further hole or recess in addition to the bundle holes.
  • the further hole or the recess can be used both for molding a soft elastic element and for the later attachment of separately manufactured parts such as so-called. Stimulators.
  • FIG. 1a Figure 11 is a plan view of a plastic backing sheet 10 having a group of bundle holes 12 whose arrangement corresponds to a desired bristle pattern. In addition to these bundle holes 12, there are further holes 14 which have a particular designation.
  • the carrier plate 10 has a generally oval shape corresponding to the head of a toothbrush. It can be made by injection molding.
  • fiber bundles 16 are inserted, whose attachment ends are melted on the back of the carrier plate to attach the fiber bundles to the carrier plate.
  • the carrier plate 10 with the attached fiber bundles 16 is in the Figures 1b, 2b and 3b shown. It can be seen that the special holes 14 are unpopulated.
  • the FIG. 3b shows that the molten attachment ends of the fiber bundles 16 form a continuous layer 17 on the back of the carrier plate 10. In this continuous layer 17 of the melt surface areas are recessed, which correspond to the specific holes 14, so that they remain free of melt. This can be achieved in different ways.
  • a first measure is to make the carrier plate 10 with melt edges which delimit the area into which the melt can flow.
  • Another possibility is to use a heating punch for melting, which come into contact with the fiber ends surfaces edge contours that limit the flow of the melt.
  • Another possibility is to place a mask over the carrier plate, this mask having suitably shaped edges which limit the flow of the melt. Further below, referring to FIG. 13 an embodiment described in which such a mask is used.
  • the carrier plate with the fiber bundles attached thereto is connected to the head of a brush body 18.
  • the connection The carrier plate with the brush body can be done in two ways.
  • a first variant of the brush body is made separately and provided with a recess into which the carrier plate is inserted with the attached fiber bundles. Subsequently, the carrier plate is welded to the head portion of the brush body to make a permanent connection.
  • the carrier plate is introduced with the fiber bundles attached thereto in an injection mold and molded with plastic, whereby the head and stem of the brush body are formed.
  • the special holes 14 remain at least largely free. As in Figure 3c can be seen, go through the special holes 14 to the back of the brush head, since the brush body has corresponding recesses in the head area. Further, the brush body is provided on the back of its head portion with a shallow recess 20.
  • the brush body 18 with attached carrier plate 10, as in the Figures 1c, 2c and 3c is then introduced into an injection mold to inject in a further manufacturing step, a soft elastic mass, an elastomer such as TPE or the like, through the special holes 14 and suitable cavities, so that pin-shaped elements 22 of soft elastic material are anchored in the holes 14.
  • These soft-elastic elements 22 are part of the bristle field and are in the embodiment shown here at the two longitudinal edges of the brush head.
  • the soft elastic mass is injected into the recess 20 at the back of the brush head, so that a continuous layer 24 of soft elastic material is formed, which fills the entire recess 20 and through the holes 14 with the soft elastic elements 22 in one piece connected is.
  • the layer 24 of soft elastic material thus occupies the back of the brush head and can, for example, have the function of a tongue cleaner. Their function can only be to give the brush a special look or feel.
  • the soft elastic elements 22 have in particular a cleaning or massage function.
  • the layer 24 of soft elastic material does not necessarily have to be introduced into a recess of the brush head. If no recess 20 is present, the layer 24 is raised on the back of the brush head and has the same function.
  • the soft elastic elements 22a are molded directly onto the carrier plate 10a.
  • a continuous layer 24a of soft elastic material is formed on the back of the carrier plate 10a, which completely covers the layer 17a of molten attachment ends of the fiber bundles formed in the previous step.
  • the carrier plate 10a with the fiber bundles 16a, soft elastic elements 22a and the layer 24a of soft elastic material attached thereto is fastened to a brush body 18a.
  • this can be done in two ways, be injected by attaching the carrier plate to a separately prepared brush body, on the other hand by molding the carrier plate with the material from the stem and head of the brush body.
  • the soft elastic material layer 24a inside the brush head is sandwiched between the layer 17a and an inner wall of the brush head.
  • the layer 24a has here mainly the function of a seal. In particular, it forms a perfect seal of the bundle holes 12a both against penetration of moisture or foreign bodies from the outside into the interior of the brush head and against plastic mass of the brush body during the injection molding of the carrier plate under high injection pressure.
  • FIGS. 7, 8 and 9 show a variant of the first embodiment of the method and therefore largely correspond to the FIGS. 1, 2 and 3 ,
  • the only difference is the brush, in particular the bristle field with an integrated soft elastic element.
  • This soft elastic element 22b is generally cross-shaped in plan view and is located in the middle of the bristle field. Accordingly, the support plate 10b has in its center a recess 14b, in which the soft elastic element 22b is anchored.
  • the production takes place in the same way as in the FIGS. 1, 2 and 3 is therefore not described again.
  • FIGS. 10, 11 and 12 illustrated method steps for producing a toothbrush follow the second embodiment of the method and thus correspond to the FIGS. 4, 5 and 6 However, show a variant of a toothbrush in the FIGS. 7, 8 and 9 is shown. The in the FIGS. 10, 11 and 12 shown process steps are therefore not described again.
  • FIG. 13 shows the use of a mask 28 for limiting the flow of the melt, which is generated when the attachment ends of the fiber bundles with the heated surface of a punch 30 come into contact, in one embodiment of the brush, the in the FIGS. 7, 8 and 9 or 10, 11 and 12 equivalent.
  • the mask 28 has, on the one hand, an edge which bounds the outer edge of the molten layer and, on the other hand, an island region 32 which delimits the region around the recess 14b of the carrier plate 10.
  • the mask 28 is made as a plate, for example made of steel.
  • a mask 28 may be used if the carrier plate has only ordinary bundle holes and no special holes or recesses for soft-elastic elements or the like. In this case, the mask 28 limits only the outer edge of the melt. This makes it possible to use completely flat carrier plates that have no molded raised boundary edge for the melt, such as in Fig. 12a shown.

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  • Engineering & Computer Science (AREA)
  • Manufacturing & Machinery (AREA)
  • Brushes (AREA)

Claims (13)

  1. Procédé de fabrication de brosses, en particulier de brosses à dents, comprenant :
    a) la fabrication de plaquettes supports (10) présentant des trous (12) pour des faisceaux de fibres (16) et au moins un trou (14) ou un évidement pour un élément élastique souple (22) ;
    b) l'insertion des faisceaux de fibres (16) dans les trous (12) ;
    c) la fixation des extrémités de fixation des faisceaux de fibres (16) débordant des trous (12) sur la plaquette support (10) par fusion, le trou (14) ou l'évidement pour un élément élastique souple (22) étant au moins en grande partie laissé exempt de fonte ;
    d) la réalisation de l'élément élastique souple (22) par moulage par injection de matière élastique souple dans un moule de moulage par injection à travers le trou (14) ou l'évidement en formant une couche (24) de la matière élastique souple du côté des extrémités de fixation fondues des faisceaux de fibres (16) ;
    e) la réunion de la plaquette support (10) à un corps de brosse (18) avant ou après le moulage par injection de la matière élastique souple.
  2. Procédé selon la revendication 1, dans lequel la réunion de la plaquette support (10) au corps de brosse (18) est effectuée avant le moulage par injection de la matière élastique souple, le corps de brosse (18) laisse le trou (14) ou l'évidement pour l'injection de la matière élastique souple au moins partiellement libre, et la couche (24) de la matière élastique souple est appliquée sur la face arrière du corps de brosse (18) détournée des faisceaux de fibres (16).
  3. Procédé selon la revendication 2, dans lequel la couche (24) de matière élastique souple est incorporée dans un évidement plan du corps de brosse (18).
  4. Procédé selon la revendication 2 ou 3, dans lequel le corps de brosse (18) est réalisé sous forme de pièce séparée à laquelle la plaquette support (10) est reliée par soudage, collage ou similaire.
  5. Procédé selon la revendication 2 ou 3, dans lequel le corps de brosse (18) est relié à la plaquette support (10) par enrobage par injection de celle-ci.
  6. Procédé selon la revendication 1, dans lequel la réunion de la plaquette support (10) au corps de brosse (18) est effectuée après le moulage par injection de la matière élastique souple, et la couche (24) de matière élastique souple recouvre les extrémités de fixation fondues des faisceaux de fibres (16).
  7. Procédé selon la revendication 6, dans lequel le corps de brosse (18) est réalisé sous forme de pièce séparée à laquelle la plaquette support (10) est reliée par soudage, collage ou similaire, la couche (24) de matière élastique souple étant en appui sur une face intérieure du corps de brosse (18).
  8. Procédé selon la revendication 6, dans lequel le corps de brosse (18) est relié à la plaquette support (10) et à la couche (24) de matière élastique souple par enrobage par injection de ces dernières.
  9. Procédé selon l'une des revendications précédentes, dans lequel le trou (14) supplémentaire ou l'évidement est au moins en grande partie laissé exempt de fonte par limitation du flux de la fonte au moyen de contours de bord sur la plaquette support, de bordures sur un poinçon (30) chauffé utilisé pour la fusion, ou au moyen d'un masque (28).
  10. Brosse, en particulier brosse à dents, comportant un corps de brosse (18) avec une tête et une plaquette support (10) qui est fixée sur celle-ci, sur laquelle sont fixés des faisceaux de fibres (16) par fusion des extrémités de fixation des faisceaux de fibres (16) insérées dans des trous (12) de la plaquette support (10), et sur laquelle au moins un élément élastique souple (22) est fixé en étant moulé par injection sur celle-ci, la matière de l'élément élastique souple pénétrant à travers un trou (14) ou un évidement de la plaquette support (10) et formant sur la face arrière de la plaquette support (10) détournée des faisceaux de fibres (16) un couche de matière (24) élastique souple qui est reliée à l'élément élastique souple (22) à travers le trou (14) ou l'évidement.
  11. Brosse selon la revendication 10, dans laquelle la couche de matière (24) élastique souple est agencée sur la face arrière du corps de brosse (18) qui est détournée des faisceaux de fibres (16), et le corps de brosse (18) présente au moins un passage à travers lequel s'étend la matière élastique souple jusqu'à l'élément (22) élastique souple du côté des faisceaux de fibres (16).
  12. Brosse selon la revendication 11, dans laquelle la couche de matière (24) élastique souple est incorporée dans un évidement plat (20) sur la face arrière du corps de brosse (18).
  13. Brosse selon la revendication 10, dans laquelle la couche de matière (24) élastique souple repose directement sur les extrémités de fixation fondues des faisceaux de fibres (16) formant une couche (17a) et est recouverte par une paroi (24) du corps de brosse (18) sur la face arrière détournée des faisceaux de fibres (16).
EP09777899.7A 2008-08-26 2009-08-14 Procédé pour produire des brosses, en particulier des brosses à dents Active EP2337474B1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE102008039778A DE102008039778A1 (de) 2008-08-26 2008-08-26 Verfahren zur Herstellung von Bürsten, insbesondere Zahnbürsten
PCT/EP2009/005927 WO2010025820A2 (fr) 2008-08-26 2009-08-14 Procédé pour produire des brosses, en particulier des brosses à dents

Publications (2)

Publication Number Publication Date
EP2337474A2 EP2337474A2 (fr) 2011-06-29
EP2337474B1 true EP2337474B1 (fr) 2014-09-17

Family

ID=41258788

Family Applications (1)

Application Number Title Priority Date Filing Date
EP09777899.7A Active EP2337474B1 (fr) 2008-08-26 2009-08-14 Procédé pour produire des brosses, en particulier des brosses à dents

Country Status (5)

Country Link
EP (1) EP2337474B1 (fr)
KR (1) KR20110056381A (fr)
CN (1) CN102159115B (fr)
DE (1) DE102008039778A1 (fr)
WO (1) WO2010025820A2 (fr)

Families Citing this family (16)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE102009039514A1 (de) * 2009-08-31 2011-03-03 Gb Boucherie Nv Verfahren zur Herstellung von Bürsten, insbesondere Zahnbürsten
CN105661863A (zh) * 2011-01-04 2016-06-15 特里萨控股股份公司 具有被注塑成型的刷毛的牙刷以及其制造的方法和设备
DE202011106118U1 (de) * 2011-09-26 2011-11-25 Gb Boucherie Nv Bürste, insbesondere Zahnbürste, mit weichelastischem Element
USD766581S1 (en) 2013-12-19 2016-09-20 Colgate-Palmolive Company Electric toothbrush handle
USD769626S1 (en) 2013-12-19 2016-10-25 Colgate-Palmolive Company Refill head for electric toothbrush
USD776435S1 (en) 2013-12-19 2017-01-17 Colgate-Palmolive Company Head portion of a toothbrush
USD790860S1 (en) 2015-11-25 2017-07-04 Colgate-Palmolive Company Electric toothbrush brush head
USD794333S1 (en) 2015-11-25 2017-08-15 Colgate-Palmolive Company Electric toothbrush brush head
EP3262974B1 (fr) 2016-06-27 2024-06-12 The Procter & Gamble Company Procédé de production de têtes de brosse à dents comprenant un élément de nettoyage bi-composant
EP3262975B1 (fr) 2016-06-28 2019-02-20 The Procter and Gamble Company Procédé de fabrication d'une brosse
JP7315552B2 (ja) * 2017-12-12 2023-07-26 コーニンクレッカ フィリップス エヌ ヴェ ブラシヘッド・アセンブリ及びこの製造方法
WO2020242123A1 (fr) * 2019-05-31 2020-12-03 주식회사 리앤코 이노베이션 Brosse à dents et procédé de fabrication de brosse à dents
EP3753447A1 (fr) 2019-06-21 2020-12-23 The Procter & Gamble Company Procédé de production d'une tête de brosse à dents ou d'une partie de celui-ci
EP3753449A1 (fr) 2019-06-21 2020-12-23 The Procter & Gamble Company Plaque de perforation de trous pour la fabrication d'une tête de brosse à dents et pièce associée
EP3753448A1 (fr) 2019-06-21 2020-12-23 The Procter & Gamble Company Procédé de production d'une tête de brosse à dents
EP3753446A1 (fr) 2019-06-21 2020-12-23 The Procter & Gamble Company Support d'élément de nettoyage et tête de brosse à dents le comprenant

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Publication number Priority date Publication date Assignee Title
US5611312A (en) * 1995-02-07 1997-03-18 Walbro Corporation Carburetor and method and apparatus for controlling air/fuel ratio of same
US6886207B1 (en) * 1999-06-14 2005-05-03 The Procter & Gamble Company Toothbrush
DE19738256C2 (de) * 1997-09-02 1999-09-23 Rueb F A Holding Gmbh Verfahren und Vorrichtung zum Herstellen von Borstenfeldern sowie damit hergestelltes Borstenfeld
WO2000064307A1 (fr) * 1999-04-22 2000-11-02 Kao Corporation Brosse a dents
ES2201626T3 (es) * 1999-12-22 2004-03-16 G.B. Boucherie, N.V. Procedimiento de fijacion de mechones de cerdas para cepillos en soportes de material termoplastico.
DE102005024082A1 (de) * 2005-05-25 2006-11-30 M + C Schiffer Gmbh Bürste und Verfahren zu deren Herstellung
DE102006025043A1 (de) * 2006-05-26 2008-02-21 M + C Schiffer Gmbh Bürste und Verfahren zu deren Herstellung

Also Published As

Publication number Publication date
DE102008039778A1 (de) 2010-03-04
CN102159115A (zh) 2011-08-17
WO2010025820A2 (fr) 2010-03-11
EP2337474A2 (fr) 2011-06-29
WO2010025820A3 (fr) 2010-05-27
KR20110056381A (ko) 2011-05-27
CN102159115B (zh) 2014-12-24

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