EP1859705B2 - Brosses et procédé destiné à leur fabrication - Google Patents

Brosses et procédé destiné à leur fabrication Download PDF

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Publication number
EP1859705B2
EP1859705B2 EP07009988.2A EP07009988A EP1859705B2 EP 1859705 B2 EP1859705 B2 EP 1859705B2 EP 07009988 A EP07009988 A EP 07009988A EP 1859705 B2 EP1859705 B2 EP 1859705B2
Authority
EP
European Patent Office
Prior art keywords
shell
brush head
head body
main brush
injection
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.)
Not-in-force
Application number
EP07009988.2A
Other languages
German (de)
English (en)
Other versions
EP1859705A1 (fr
EP1859705B1 (fr
Inventor
Markus Hörenbaum
Erwin Buchholz
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.)
M&C Schiffer GmbH
Original Assignee
M&C Schiffer GmbH
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
Family has litigation
First worldwide family litigation filed litigation Critical https://patents.darts-ip.com/?family=38462032&utm_source=google_patent&utm_medium=platform_link&utm_campaign=public_patent_search&patent=EP1859705(B2) "Global patent litigation dataset” by Darts-ip is licensed under a Creative Commons Attribution 4.0 International License.
Application filed by M&C Schiffer GmbH filed Critical M&C Schiffer GmbH
Publication of EP1859705A1 publication Critical patent/EP1859705A1/fr
Application granted granted Critical
Publication of EP1859705B1 publication Critical patent/EP1859705B1/fr
Publication of EP1859705B2 publication Critical patent/EP1859705B2/fr
Not-in-force legal-status Critical Current
Anticipated expiration legal-status Critical

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Classifications

    • 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
    • A46B3/00—Brushes characterised by the way in which the bristles are fixed or joined in or on the brush body or carrier
    • A46B3/04—Brushes characterised by the way in which the bristles are fixed or joined in or on the brush body or carrier by mouldable materials, e.g. metals, cellulose derivatives, plastics
    • 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
    • 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

Definitions

  • the present invention relates to a toothbrush and a method for the production thereof.
  • the bristle bundles are introduced into channels, which are formed on a small plate, which is also integrated into the brush to be produced.
  • the fastening-side ends of the bristle bundles are melted and shaped according to this prior art, preferably in such a way that the melt produced by heating the fastening-side ends forms a form-fitting manner in the manner of a backing layer on the small plate.
  • the WO 2005/013762 A1 discloses a toothbrush whose bristle bundles are inserted into and secured in a gel material, thereby providing flexible support of the bundles of bristles should be achieved.
  • a similar solution is from the DE 201 20 773 U1 known.
  • the bristle bundles are each held in individual compartments, which are filled with a soft elastic plastic component.
  • Even after the apprenticeship after the WO 2005/084486 A1 are individual bristle bundles embedded in a soft elastic cushion, which forms the essential part of a brush head of a toothbrush and which is supported on the back by a support arc of the brush head.
  • the present invention is based on the problem to provide a method for producing a brush and a brush produced by the method, which meets the highest optical and hygienic requirements.
  • a brush whose brush head carries a cleaning element that can be varied in terms of shape and size within wide limits.
  • the present invention also wants to specify a brush that can meet the hygienic, optical and technical requirements that are placed on high-quality brushes, in particular toothbrushes by combining different materials.
  • a brush body made of plastic is first formed, which forms at least one shell which is open to the top and essentially closed at the bottom.
  • the upper side of the brush base body is understood to mean that side which is surmounted by the cleaning elements, namely the bundles of bristles, and which regularly lies opposite the surface to be cleaned.
  • At this top of the brush head body is open, but has a staggered thereto provided in the bottom, which forms the bottom of the there substantially closed shell.
  • This shell has edges which preferably follow substantially the outer contour of the brush head body. Thereafter, preferably, a circumferential, relatively thin edge protrudes from the bottom surrounding the shell circumferentially.
  • At least one bristle bundle is inserted with its fastening-side end.
  • a thickening has been formed by melting before insertion into the shell.
  • the thickening is usually arranged at a distance from the upper edge of the shell in this.
  • the shell is filled with the plastic.
  • This plastic is filled in the molten state and settles upon solidification, for example by cooling and / or Crosslinking, to the bottom and the inner edge of the shell and includes the thickening of the attachment-side end of the bristle or bundles.
  • the bristle bundle is fixed to the brush head body.
  • the shell is closed substantially at the bottom, which does not preclude that the shell may have in its bottom or at its edge an injection port through which the plastic is injected into the shell.
  • This injection opening is preferably sealed in this case.
  • the brush head body may have one or more shells into which one or more bundles of bristles protrude.
  • the filling of the plastic can be done up to the upper edge of the shell. Just as well, the plastic can also be filled the edge slightly outstanding. If a plurality of shells are formed on the brush head body, they can be filled in relation to the longitudinal extent of the bristle bundles in diverging altitudes with the plastic to create a contoured, projected by bristle bundles surface of the brush head.
  • the areas of different heights can merge intermittently or continuously.
  • a bristle field having a plurality of bristle bundles is stuffed in a perforated field plate which has holding channels for the bristle bundles corresponding to the bristle field. Each individual channel is stuffed with a bundle of bristles.
  • the perforated field plate is applied when filling the shell at its upper edge and thus covers the opening formed by the shell.
  • the perforated field plate is preferably applied to the upper edge of the shell such that the perforated field plate seals the shell.
  • the shell preferably has a circumferential edge in the circumferential direction.
  • the inventive method offers the possibility to fix the bristle bundles with a relatively small injection unit to the brush head body. All you have to do is fill the bowl.
  • the shell is filled with PP as a hard component.
  • the brush body is after fixing the bristle bundles, ie after filling the shell with the plastic encapsulated on its outside, in particular with a soft elastic plastic component, the further Protection of oral mucous membranes in the manufacture of a toothbrush is used.
  • the injection opening provided for filling the shell by injecting the plastic through the wall of the brush base body delimiting the shell is preferably overmolded and thus covered on the outside.
  • the encapsulation should preferably take place in such a way that the circumferential edge of the brush head base body is peripherally encapsulated, whereby a further mucous membrane protection is provided on the outer peripheral surface of the brush head main body preferably formed from a hard component.
  • the encapsulation thus forms a circumferential impact protection. If the shell is filled by spraying the plastic through a relatively thin wall of the shell, this has the advantage that it can be operated with relatively low pressures, since the flow path from the injection point to the shell is extremely low. This has particular advantages for the position of the bristle bundles after fixing them in the shell.
  • the fundamental problem is that they are displaced from the preset position and fixed in this shifted arrangement and orientation after solidification of the injected plastic mass. Such an impairment need not be feared when injecting at lower speeds and / or lower pressures.
  • the method can thus produce toothbrushes with good quality and exact bundle position.
  • a further preferred embodiment of the present invention preferably further provided on the outside of the brush head body, usually formed in the longitudinal direction of the bristle bundles slots to form superior cleaning elements from the underside of the brush head body with a thermoplastic elastomer.
  • the longitudinal slots can be closed circumferentially by the material of the brush head body.
  • these longitudinal slots are preferably formed by recesses of the brush head main body that are open to the outside, which are closed during injection molding by the injection molding tool surrounding the brush head main body, which forms a shaping element for forming the cleaning elements from the thermoplastic elastomer.
  • a toothbrush comprising a brush head body forming at least one shell open to the top.
  • This shell is at least one bristle bundle with its fastening side, provided by melting with a thickened end and fixed by a filled in the shell plastic, namely PP as a hard component.
  • a hard component is first injected into an injection mold, which is a mold cavity for forming a brush body having.
  • This main body consists of a brush head base body 5, a provided between the thickened handle 4 and the brush head body 5 brush neck 6 and the handle handle 4.
  • the brush body 5 can be encapsulated, subsequently printed and / or decorated.
  • the brush head body 5 forms a shell 8, which is surrounded by one of the circumferential contour of the brush head 2 substantially corresponding edge 10.
  • the shell 8 is bounded and closed on the underside by a bottom 12 which extends parallel to the top of the rim 10.
  • the rear wall 14 provided on the underside of the brush head base body 5 has an injection opening 16, which connects the rear side of the brush head base body 5 with the shell 8.
  • recesses 18 extending at right angles to the upper side of the rim 10 are recessed, which are open to the circumferential outer side of the brush head main body 5. At the position of the recesses 18 of the edge 10 is slightly offset in the direction of the shell 8 inwardly formed.
  • the rear wall 14 formed by the brush head body 5 has a front and a rear raised portion 20 which is exposed on the outside of the brush to be produced.
  • the two distal and proximal raised portions 20 enclose therebetween a slightly inwardly offset rear wall bottom 22, whose front and rear ends are aligned with the respective outer edges of the recesses 18.
  • the injection opening 16 is located in the region of the rear wall bottom 22.
  • the in the Figures 1 and 2 illustrated brush head body 5 is implemented by injection molding production by injecting a hard component into a first injection mold into a second injection mold.
  • This second injection mold is covered by a perforated field plate which is applied to the top of the rim 10.
  • the perforated field plate has holding channels for receiving bristle bundles 24 corresponding to a bristle field 25 of the brush to be produced (cf. FIGS. 7 and 8 The size and arrangement of the bristle bundles 24.
  • the perforated field plate is filled with the possibly different sized bristle bundles 24, which are then heated at their mounting side ends and thereby melted. This inevitably forms a thickening 28 at the individual bristle bundles 24.
  • This thickening 28 is arranged at a distance from the underside of the perforated field plate during installation of the perforated field plate in the second injection mold, as shown schematically in the FIGS. 3 and 4 is shown.
  • the figures show the situation after installation of the perforated field plate in the second injection mold and before the filling of the plastic in the shell 8. How the FIG. 4 can be seen, are the bristle bundles 24 with their thickening 28 at a distance from the upper edge of the shell 8 circumferentially surrounded by the edge 10 of the shell 8.
  • the plastic is now injected into the shell 8 from behind after closing the second injection mold , The attachment-side ends of the bristle bundles 24 with their thickening 28 are enclosed by the plastic.
  • the perforated field plate is in this case against the top of the edge 10 at.
  • the in Fig. 6 obtained intermediate product can be obtained.
  • the bristle bundles 24 are received with their thickening 28 in the solidified in the shell 8 filled plastic 30.
  • the plastic 30 should preferably be adhesion-compatible with the hard-shell component forming the brush head base body 5, in particular in the area of the surface of the brush between the brush head base body and the plastic 30 filled into the shell 8, during intensive use of the brush, to leave no slot in which germs are formed and can infiltrate contaminants.
  • thermoplastic elastomer is injected into a mold cavity, which extends flush between the raised areas 20 of the rear wall 14 and surrounds the intermediate product circumferentially.
  • the third injection mold further has the recesses 18 continuing and extending in the longitudinal direction of the bristle bundles 24 channels.
  • the injected into the mold cavity of the third injection molding thermoplastic elastomer thus fills the back wall bottom 22 to form a heel-free rear wall of the brush head 2, flows through the recesses 18 and into the adjoining channels to form the edge provided cleaning elements 32 of thermoplastic elastomer to solidify.
  • the toothbrush thus produced is with its front portion in the FIGS. 7 and 8 shown.
  • the sealing of the bristle bundles 24 in the plastic 30 offers the possibility to achieve a high design variation by a suitable choice of the plastic.
  • the basic brush head body 5 merely serves to form a shell, which is hardly recognizable, in particular, during the subsequent external molding on the finished brush.
  • the brush head body forms the mechanical skeleton of the finished brush.
  • By filling the plastic in the shell and encapsulation is possible to realize different designs.
  • By placing the perforated field plate on the edge of the one shell a smooth termination and transition can be achieved at the top of the brush.
  • the seams on the finished product sometimes to be recognized when using perforated field plates at the point at which the perforated field plate passes into the injection mold within the cavity can be largely avoided.
  • thermoplastic elastomer which is particularly recommended in the manufacture of toothbrushes for mucosal protection.
  • the method presented by the present invention can be used economically for the production of mass-produced articles by means of plastic injection molding.
  • On a second injection mold, which holds the brush head body back, can be dispensed with in this variant.

Landscapes

  • Chemical & Material Sciences (AREA)
  • Engineering & Computer Science (AREA)
  • Materials Engineering (AREA)
  • Brushes (AREA)

Claims (11)

  1. Procédé de fabrication d'une brosse à dents dans lequel un corps de base de tête de brosse (5) est formé, constituant au moins une coquille (8) ouverte dans sa partie supérieure et essentiellement fermée dans sa partie inférieure, dans lequel au moins un faisceau de poils (24) est inséré dans la coquille (8) par son extrémité pourvue d'un épaississement (28) par thermosoudage à son côté fixation, et dans lequel le faisceau de poils (24) est fixé au corps de base de la tête de brosse (5) par remplissage de la coquille (8) avec du plastique (30), notamment du PP comme composant dur (30).
  2. Procédé selon la revendication 1, caractérisé en ce que la coquille (8) est remplie par injection du plastique (30) à travers un orifice d'injection (16) constitué dans la coquille (8).
  3. Procédé selon la revendication 1 ou 2, caractérisé en ce que le plastique (30) est injecté à travers la paroi arrière (14) du corps de base de la tête de brosse (5).
  4. Procédé selon l'une des revendications précédentes, caractérisé en ce qu'une zone de brosse (26) comportant une pluralité de faisceaux de poils (24) est fourrée dans une plaque à plage de trous comportant des canaux d'arrêt correspondant à la zone de brosse (26), ladite plaque étant agencée sur le bord (10) du côté supérieur lors du remplissage de la coquille (8).
  5. Procédé selon la revendication 4, caractérisé en ce que la plaque à plage de trous scelle la coquille (8) sur son bord lors du remplissage.
  6. Procédé selon l'une des revendications précédentes, caractérisé en ce que le corps de base de la tête de brosse (5) est injecté à partir d'un composant dur sous forme d'un élément d'un corps de base de brosse avec un col de brosse (6) et un élément de manche (4).
  7. Procédé selon l'une des revendications précédentes, caractérisé en ce que le corps de base de la tête de brosse (5) est injecté périphériquement sur son côté externe après la fixation du faisceau de poils (24).
  8. Procédé selon la revendication 7, caractérisé en ce que l'orifice d'injection (16) aménagé à travers le corps de base de la tête de brosse (5) pour le remplissage de la coquille (8) est recouvert par injection lors de l'injection périphérique.
  9. Procédé selon la revendication 7 ou 8, caractérisé en ce que le bord périphérique (10) du corps de base de la tête de brosse (5) est injecté sur tout son pourtour.
  10. Procédé selon l'une des revendications 7 à 9, caractérisé en ce que, lors de l'injection périphérique, au moins un évidement (18) renfoncé sur le côté externe du corps de base de la tête de brosse (5) en direction longitudinale du faisceau de poils (24) est injecté avec un élastomère thermoplastique depuis la partie inférieure pour constituer au moins un élément de nettoyage (32) dépassant de la partie supérieure du corps de base de la tête de brosse (5).
  11. Brosse à dents avec un corps de base de la tête de brosse (5) qui constitue au moins une coquille (8) ouverte sur sa partie supérieure et remplie à l'aide d'un plastique (30), notamment du PP comme composant dur (30), dans laquelle au moins un faisceau de poils (24) est fixé sans ancrage dans la coquille (8) par son extrémité côté fixation pourvue d'un épaississement (28) par thermosoudage qui comporte l'épaississement, et dans laquelle la coquille (8) comporte dans son fond ou sur son bord un orifice d'injection (10) à travers lequel le PP est injecté comme composant dur (30) dans la coquille (8).
EP07009988.2A 2006-05-26 2007-05-18 Brosses et procédé destiné à leur fabrication Not-in-force EP1859705B2 (fr)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DE200610025043 DE102006025043A1 (de) 2006-05-26 2006-05-26 Bürste und Verfahren zu deren Herstellung

Publications (3)

Publication Number Publication Date
EP1859705A1 EP1859705A1 (fr) 2007-11-28
EP1859705B1 EP1859705B1 (fr) 2012-08-22
EP1859705B2 true EP1859705B2 (fr) 2015-07-15

Family

ID=38462032

Family Applications (1)

Application Number Title Priority Date Filing Date
EP07009988.2A Not-in-force EP1859705B2 (fr) 2006-05-26 2007-05-18 Brosses et procédé destiné à leur fabrication

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EP (1) EP1859705B2 (fr)
DE (1) DE102006025043A1 (fr)

Families Citing this family (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE102008039778A1 (de) * 2008-08-26 2010-03-04 Firma G.B. Boucherie N.V. Verfahren zur Herstellung von Bürsten, insbesondere Zahnbürsten
DE102009039514A1 (de) * 2009-08-31 2011-03-03 Gb Boucherie Nv Verfahren zur Herstellung von Bürsten, insbesondere Zahnbürsten
EP2632293B1 (fr) 2010-10-25 2016-09-28 Zahoransky Formenbau Gmbh Brosse et procédé pour fabriquer une brosse
EP3087864A1 (fr) 2015-04-29 2016-11-02 M+C Schiffer GmbH Procédé de production d'une brosse, en particulier brosse à dent et poignée associée
DE102016011477B4 (de) * 2016-09-22 2022-03-31 M + C Schiffer Gmbh Bürstenkopf für eine elektrisch angetriebene Zahnbürste und Verfahren zu deren Herstellung
DE102019205055A1 (de) 2019-04-09 2020-10-15 M+C Schiffer Gmbh Mundpflegeinstrument

Citations (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0676268A1 (fr) † 1994-04-07 1995-10-11 G.B. Boucherie, N.V. Procédé pour le moulage par injection de brosses
WO2000076369A2 (fr) † 1999-06-14 2000-12-21 The Procter & Gamble Company Brosse a dents
DE19962188A1 (de) † 1999-12-22 2001-09-06 Schiffer Fa M & C Verfahren zur Herstellung eines Bürstenkopfes im Wege des Spritzgiessens
DE20120773U1 (de) † 2001-12-21 2002-04-18 Meckseper, Nikolas, 20144 Hamburg Hochelastischer Zahnbürstenkopf
DE10217527A1 (de) † 2002-04-19 2003-11-06 Zahoransky Anton Gmbh & Co Verfahren zum Herstellen von Bürsten sowie danach hergestellte Bürste
WO2005013762A1 (fr) † 2003-07-25 2005-02-17 Glaxosmithkline Consumer Healthcare Gmbh & Co Kg Brosse a dents
WO2005084486A1 (fr) † 2004-03-09 2005-09-15 Glaxosmithkline Consumer Healthcare Gmbh & Co Kg Brosse a dents

Family Cites Families (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0567672B1 (fr) * 1992-04-28 1995-09-06 G.B. Boucherie, N.V. Procédé pour fabriquer des brosses à dents
US5350219A (en) * 1993-07-26 1994-09-27 Acumen Co., Ltd Toothbrush without metal gasket
DE19542393A1 (de) * 1995-11-14 1997-05-15 Zahoransky Anton Gmbh & Co Verfahren zum Herstellen von Bürsten sowie Bürstenherstellungsmaschine
WO2003017801A1 (fr) * 2001-08-24 2003-03-06 Kao Corporation Procede de fabrication d'une brosse a dents
MXPA05001542A (es) * 2002-08-09 2005-04-19 Colgate Palmolive Co Cepillo de dientes flexible.
US20060096052A1 (en) * 2004-11-09 2006-05-11 Michel Parisi Toothbrush with gum protector

Patent Citations (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0676268A1 (fr) † 1994-04-07 1995-10-11 G.B. Boucherie, N.V. Procédé pour le moulage par injection de brosses
WO2000076369A2 (fr) † 1999-06-14 2000-12-21 The Procter & Gamble Company Brosse a dents
DE19962188A1 (de) † 1999-12-22 2001-09-06 Schiffer Fa M & C Verfahren zur Herstellung eines Bürstenkopfes im Wege des Spritzgiessens
DE20120773U1 (de) † 2001-12-21 2002-04-18 Meckseper, Nikolas, 20144 Hamburg Hochelastischer Zahnbürstenkopf
DE10217527A1 (de) † 2002-04-19 2003-11-06 Zahoransky Anton Gmbh & Co Verfahren zum Herstellen von Bürsten sowie danach hergestellte Bürste
WO2005013762A1 (fr) † 2003-07-25 2005-02-17 Glaxosmithkline Consumer Healthcare Gmbh & Co Kg Brosse a dents
WO2005084486A1 (fr) † 2004-03-09 2005-09-15 Glaxosmithkline Consumer Healthcare Gmbh & Co Kg Brosse a dents

Non-Patent Citations (1)

* Cited by examiner, † Cited by third party
Title
K. OBERBACH, DR.-ING. ET AL.: "Saechtling Kunststoff Taschenbuch", vol. 29, 2004, CARL HANSER VERLAG, MÜNCHEN, pages: 398 - 399 †

Also Published As

Publication number Publication date
EP1859705A1 (fr) 2007-11-28
EP1859705B1 (fr) 2012-08-22
DE102006025043A1 (de) 2008-02-21

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