EP1684612A1 - Procede et dispositif pour realiser des brosses comprenant des faisceaux de poils et des elements d'extremite - Google Patents

Procede et dispositif pour realiser des brosses comprenant des faisceaux de poils et des elements d'extremite

Info

Publication number
EP1684612A1
EP1684612A1 EP04797812A EP04797812A EP1684612A1 EP 1684612 A1 EP1684612 A1 EP 1684612A1 EP 04797812 A EP04797812 A EP 04797812A EP 04797812 A EP04797812 A EP 04797812A EP 1684612 A1 EP1684612 A1 EP 1684612A1
Authority
EP
European Patent Office
Prior art keywords
knobs
brush body
bristle
injection molding
molding machine
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.)
Granted
Application number
EP04797812A
Other languages
German (de)
English (en)
Other versions
EP1684612B1 (fr
Inventor
Reto STRÄHLER
Ulrich Kaczmarek
Otmar Horl
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.)
Trisa Holding AG
Zahoransky AG
Original Assignee
Trisa Holding AG
Zahoransky AG
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=34585161&utm_source=google_patent&utm_medium=platform_link&utm_campaign=public_patent_search&patent=EP1684612(A1) "Global patent litigation dataset” by Darts-ip is licensed under a Creative Commons Attribution 4.0 International License.
Application filed by Trisa Holding AG, Zahoransky AG filed Critical Trisa Holding AG
Publication of EP1684612A1 publication Critical patent/EP1684612A1/fr
Application granted granted Critical
Publication of EP1684612B1 publication Critical patent/EP1684612B1/fr
Revoked legal-status Critical Current
Anticipated expiration legal-status Critical

Links

Classifications

    • A—HUMAN NECESSITIES
    • A46—BRUSHWARE
    • A46D—MANUFACTURE OF BRUSHES
    • A46D3/00—Preparing, i.e. Manufacturing brush bodies
    • A—HUMAN NECESSITIES
    • A46—BRUSHWARE
    • A46B—BRUSHES
    • A46B15/00—Other brushes; Brushes with additional arrangements
    • A46B15/0002—Arrangements for enhancing monitoring or controlling the brushing process
    • A46B15/0016—Arrangements for enhancing monitoring or controlling the brushing process with enhancing means
    • A46B15/0032—Arrangements for enhancing monitoring or controlling the brushing process with enhancing means with protrusion for polishing teeth
    • 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
    • A—HUMAN NECESSITIES
    • A46—BRUSHWARE
    • A46B—BRUSHES
    • A46B9/00—Arrangements of the bristles in the brush body
    • A46B9/06—Arrangement of mixed bristles or tufts of bristles, e.g. wire, fibre, rubber

Definitions

  • the invention relates to a method and a device for producing brushes with bristle bundles and knobs made of plastic, rubber or rubber-like material.
  • Brushes in particular toothbrushes, are known which, in addition to the cleaning bristles, have rubber-like knobs which are used, for example, for gum massage or for polishing the teeth.
  • Such brushes are manufactured by first spraying the brush body with the bundle holes and then spraying the knobs in a second spraying process. Finally, the bundles of bristles are plugged into the bundle holes.
  • a certain minimum distance between the knobs and the bundle holes must be taken into account in order to enable tamping at all. After the bundles of bristles are stuffed, they are sheared off, but this is only possible up to the length of the knobs, since these would otherwise be damaged.
  • knobs can also be displaced during shearing, but this is complex and limits the possibilities for shearing. Rounding the ends of the bristle bundles with grinding wheels is also problematic, since the bristles are bent over here and the grinding wheels engage deeper than a shearing unit. Pushing the knobs away to avoid damage is even more problematic. In addition, when the bristle bundles are rounded off, fine dust is formed, which is deposited on the rubber knobs and is difficult to remove. The object is therefore to create a method and a device with which brushes with bristle bundles and knobs can be easily produced and the knobs are not damaged and / or contaminated. In addition, the knobs should be able to be arranged relatively close to the bristle bundles.
  • the solution according to the invention consists in that the bristle bundles are first stuffed into a brush body and reworked, and then at least the knobs, and possibly also additional parts, are connected to the brush body.
  • the knobs By inserting the knobs at the end of the manufacturing process, the bristle bundles can be sheared off, rounded and ground in the usual way.
  • the insertion of the knobs after stuffing the bristle bundle also allows a reduced distance between knobs and bristle bundles, which enables a more flexible design of the bristle field.
  • the nubs can be injected into the nub receiving holes of the brush body or sprayed onto the brush body.
  • corresponding receiving holes can also be provided for the knobs, which bring about anchoring and thus a particularly good hold of the knobs on the brush body.
  • the bristle bundles adjacent to the position of the knobs to be introduced on the brush body are displaced when the brush body by means of the displaced bristle bundles of an injection mold for spraying the knobs and if the displacement device is withdrawn after inserting the brush body into the injection mold.
  • knobs it is also possible for the knobs to be manufactured in a separate operation and then connected to the brush body, in particular plugged into receiving openings in the brush body or fastened or glued to the brush body.
  • the insertion of the knobs is particularly easy if the knobs are used in through-openings on the brush body from the side of the brush body opposite the bristle field.
  • the work area for inserting the knobs is thus on the rear side facing away from the bristle bundles, so that no special precautions or measures need to be taken to displace bristle bundles or to make the knob receiving openings accessible.
  • the invention is characterized in that an assembly device is provided for equipping a bristled brush body with at least knobs. This results in the advantages already explained in the description of the method according to the invention.
  • the assembly device is an injection molding machine with an injection mold for spraying the knobs, a displacement device for the Has bristle bundles and a transfer gripper for inserting the brush body equipped with bristle bundles into the injection mold.
  • the bristled brush body is inserted by means of the transfer gripper from a postprocessing station into an injection mold in which the knobs are sprayed onto the brush body or injected into correspondingly provided knob receiving openings.
  • At least the bristle bundles adjacent to the knob injection position are displaced from the immediate spray area with a displacement device.
  • a feeding and stuffing device for feeding separate knobs to the brush body and for stuffing the knobs into receiving openings of the brush body is provided as the fitting device. Since such a stuffing device requires less space compared to an injection molding device, the knobs can be arranged particularly close to existing bristle bundles, so that smaller brush sizes are possible or a more compact arrangement of bristle bundles and knobs can be realized.
  • the receiving openings are designed as blind holes for plugging the knobs from the bristle side.
  • the receiving openings for the knobs are conical are tapered to the bristle field, possibly have an undercut and in their
  • At least one feed channel which is approachable to a respective knob receiving opening, for receiving a respective knob element with a plunger guided therein is provided, and if the feed channel is at least at its in the stuffing position of the receiving opening facing end area penetrating into the bristle field of the brush body is particularly elastically deformable with respect to its cross-sectional size.
  • the feed channel can be guided past the adjacent bristle bundles to the surface of the brush body, in order then to insert a knob element into a receiving opening provided for this purpose.
  • the bundles of bristles expand slightly at their free ends.
  • the cross section of the feed channel can be changeable.
  • the feed channel has a small cross section in order to be guided past the bundles of bristles.
  • the feed channel is inserted up to the surface of the brush body, its cross section is increased in accordance with the cross section of the knobs to be used, so that a knobs element can be pressed into the respective receiving opening with the plunger.
  • the feed channel can be designed in particular as a longitudinally slotted sheet metal tube with overlapping longitudinal edges.
  • the insertion of the knobs can be simplified if the receiving openings are designed as through openings, in particular for plugging the knobs off the bristle field. turned side of the brush body. As a result, no precautions are required to displace bundles of bristles.
  • the nubs are visible after insertion from the side of the brush body facing away from the bristle field, which can be used as a design feature for the brush. However, it is also possible to provide the side of the brush body facing away from the bristle field with a cover.
  • the pimpled knobs can just end with the side of the brush body facing away from the bristle field. However, it is also possible for the stuffed knobs to protrude beyond the side of the brush body facing away from the bristle field as additional users. In addition to polishing the teeth and massaging the gums, these users, preferably protruding one or more millimeters, can also be used, for example, as tongue brushes or massage elements for the interior of the mouth.
  • the injection molding machine for spraying the knobs can be designed as a multi-component injection molding machine for spraying different knobs.
  • the different knobs can differ in terms of color and / or shape.
  • an injection molding machine with an injection mold for injecting additional parts for example a suction cup, is provided on or in the brush bodies equipped with bristle bundles.
  • the multi-component injection molding machine can be designed to inject different studs, if necessary, and to inject or overmold at least one additional part.
  • the knobs and / or the optionally additionally provided parts can also be supplied as finished parts and then connected to the brush body by injection molding.
  • an assembly device can be installed in front of the injection molding machine (s) for attaching at least one additional part to be overmolded in the injection molding machine and / or for attaching knobs which may be overmolded in the injection molding machine.
  • 1 is a transfer gripper with a brush body held by this and with a displacement device arranged outside the bristle field of the brush body in front view,
  • FIG. 3 shows the arrangement according to FIG. 1 with the displacement device inserted into the bristle field
  • FIG. 4 shows the arrangement according to FIG. 3 in side view
  • FIG. 5 shows the bristled brush body from FIGS. 1 to 4 inserted into an injection mold
  • FIGS. 1 to 5 shows an arrangement similar to FIGS. 1 to 5 with a differently arranged displacement device
  • 11 is an injection mold with beveled molded parts as a displacement device for the bristles of a toothbrush
  • 12 shows the arrangement according to FIG. 11 with the brush inserted into the injection mold
  • FIG. 13 shows a schematic illustration of a device with a bristle processing device, a transfer gripper and an injection molding machine
  • Fig. 14 is a schematic representation of a device with a bristle processing device and a feeding and stuffing device for knobs and
  • Fig. 15 is a schematic representation of a device with a tamping and finishing device and an injection molding machine.
  • FIG. 15 a tamping and finishing device 21 shown in FIG. 15 to an injection molding machine 29 with an injection mold 4a (FIGS. 5 and 10) for spraying the knobs.
  • the bristle field can first be completely machined, sheared off and ground, so that the knobs introduced only afterwards are not a hindrance by these work steps and are not damaged.
  • the device shown in FIG. 15 has a brush body feed 23 to a stuffing device 24, which is followed by a finishing device 25.
  • the brush body which is particularly equipped with sheared bristles and rounded at the ends, is removed from it with the help a transfer device 27 having the transfer gripper 1 is transported to a subsequent mounting device 26.
  • the mounting device 26 has a rotary table or turntable 28, in which additional parts, for example suction cups for attachment to the brush bodies, can be supplied. These additional parts, each mounted on the brush body, can be additionally encapsulated in a downstream injection molding machine 29. There is also the possibility that 28 knobs 18 are fed to the rotary table or turntable and overmolded in the injection molding machine 29.
  • the knobs 18 can also be injection molded with the injection molding machine 29, as can additional parts such as the suction cups.
  • the injection molding machine 29 can be designed as a multi-component injection molding machine. This can be used to spray different knobs and, if necessary, additional parts.
  • a multi-component injection molding machine can also be used for both injection molding and overmolding of the knobs and / or the additional parts.
  • a guide 5 for an expansion fork 6 is provided on the transfer gripper 1 (FIGS. 1 to 4, 6 to 9).
  • the spreading fork 6 can be adjusted between a rest position shown in FIGS. 1, 2, 6 and 7 outside the bristle field and a spreading position engaging and displacing individual bristle bundles 2 and pushing and displacing individual bristle bundles 2 (FIGS. 3, 4, 8, 9).
  • the expansion fork 6 has run-up slopes 8 which, when the expansion fork 6 is moved into the bristle field in the insertion direction (Pf1), displace the free ends of the bristle bundles 2 arranged in the application area of the expansion fork 6 to the outside.
  • a bristle-free area 7 (FIGS. 2, 4, 7, 9) is provided on the brush body 3, in which knobs are to be attached.
  • the brush body 3 can have recesses into which the knobs are introduced.
  • the brush body 3 with the displaced or laterally deflected bristle bundles 2 is fed with the transfer gripper 1 to an injection mold 4a, the bristle-free area 7 being guided via an outlet opening 9 for the rubber material of the knobs.
  • the expansion fork 6 can be withdrawn before reaching the injection position in which the brush body 3 rests against the free ends 10 of the outlet opening (s) 9 (FIGS. 5 and 10) to simplify flush insertion of the brush body 3.
  • the knobs can then be molded onto the brush body 3. If necessary, the brush body 3 can be converted with the transfer gripper 1 into a further injection mold in order to inject further knobs, for example in a different color.
  • FIGS. 1 to 5 each show an arrangement with an expansion fork 6 which can be moved into the bristle field transversely to the longitudinal direction of the bristles, while in the arrangement according to FIGS. 6 to 10 the expansion fork 6 can be moved into the bristle field in the longitudinal direction of the brush.
  • FIG. 11 shows an injection mold 4b, which has a receiving area 11 for a bristled brush body 3 and a spray nozzle 12 for spraying or injecting knobs on or into the brush body 3.
  • the injection mold 4b has a a molded part 14 as a displacement device on its insertion side 13.
  • the molded part 14 tapers from the spray nozzle 12 to its free end on the insertion side 13.
  • the brush body 3 After the brush body 3 has been introduced into the injection mold 4b in the direction of insertion Pf1, the brush body 3 is displaced in the longitudinal direction of the bristle until the brush body 3 lies sealingly against the spray nozzle 12 (FIG. 12). In this position, one or more knobs can be injected onto or into the brush body 3. After injection of the knob (s), the brush body 3 can be removed from the injection mold 4b with a transfer gripper (not shown in FIGS. 11 and 12).
  • FIG. 13 shows a schematic illustration of a device 15a according to the invention with a finishing device 16 for shearing off, grinding off and / or polishing the bristle bundles 2 of a bristled brush body 3 and with a transfer gripper 1 for transferring the brush bodies 3 from the finishing device 16 to an injection molding machine 17 in which one or more knobs 18 are injected or injected onto the brush body 3a.
  • FIG. 14 shows a schematic illustration of another embodiment of a device 15b according to the invention, which likewise has a finishing device 16 for shearing off, grinding off and / or polishing the bristle bundles 2 of a bristled brush body 3. From there, the bristled brush bodies 3 are fed to an equipping device 19, with the prefabricated knobs 18 are plugged into receiving openings 20 on the brush body 3a. These receiving openings 20 can preferably be incorporated in a manner comparable to the receiving openings for the bristle bundles when the brush body 3 is sprayed.
  • the knobs 18 can be designed like a pin. However, other shapes are also possible, for example wider knobs or curved knobs.

Landscapes

  • Engineering & Computer Science (AREA)
  • Manufacturing & Machinery (AREA)
  • Brushes (AREA)
  • Moulds For Moulding Plastics Or The Like (AREA)

Abstract

Pour permettre la réalisation de brosses comprenant des faisceaux de poils (2) et des éléments d'extrémité (18) en plastique, caoutchouc ou matière de type caoutchouc, les faisceaux de poils (2) étant tout d'abord enfoncés dans un corps de brosse (3) puis subissant un traitement ultérieur. Ensuite, les éléments d'extrémité (18) sont reliés au corps de brosse (3). Les éléments d'extrémité (18) peuvent soit être injectés contre le corps de brosse dans un moule de moulage par injection (4a, 4b), soit être réalisés séparément et fixés au corps de brosse (3) au moyen d'un dispositif de fixation (19). La fixation peut s'effectuer soit par collage, soit par enfoncement dans des ouvertures de réception (20).
EP04797812A 2003-11-14 2004-11-11 Procede et dispositif pour realiser des brosses comprenant des faisceaux de poils et des elements d'extremite Revoked EP1684612B1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE10353541.1A DE10353541B4 (de) 2003-11-14 2003-11-14 Verfahren und Vorrichtung zur Herstellung von Bürsten mit Borstenbündeln und Noppen
PCT/EP2004/012778 WO2005048773A1 (fr) 2003-11-14 2004-11-11 Procede et dispositif pour realiser des brosses comprenant des faisceaux de poils et des elements d'extremite

Publications (2)

Publication Number Publication Date
EP1684612A1 true EP1684612A1 (fr) 2006-08-02
EP1684612B1 EP1684612B1 (fr) 2008-12-31

Family

ID=34585161

Family Applications (1)

Application Number Title Priority Date Filing Date
EP04797812A Revoked EP1684612B1 (fr) 2003-11-14 2004-11-11 Procede et dispositif pour realiser des brosses comprenant des faisceaux de poils et des elements d'extremite

Country Status (3)

Country Link
EP (1) EP1684612B1 (fr)
DE (2) DE10353541B4 (fr)
WO (1) WO2005048773A1 (fr)

Family Cites Families (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2551663A3 (fr) * 1983-09-14 1985-03-15 Sinzo Tamura Brosse favorisant la croissance des cheveux
DE3905043A1 (de) * 1989-02-18 1990-08-23 Stemme Otto Buerste zur koerperpflege
DE9305163U1 (de) * 1993-04-03 1993-07-01 Lessmann GmbH, 8867 Oettingen Schuhbürste
US5628082A (en) * 1995-03-22 1997-05-13 Colgate-Palmolive Company Toothbrush with improved efficacy
WO2000064307A1 (fr) * 1999-04-22 2000-11-02 Kao Corporation Brosse a dents
DE10143673B4 (de) * 2001-09-06 2014-03-13 Braun Gmbh Verfahren zum Beborsten eines Bürstenträgers einer Zahnbürste mit aus einzelnen Borsten zusammengesetzten Büscheln
DE10164336A1 (de) * 2001-12-28 2003-07-17 Trisa Holding Ag Triengen Zahnbürste und Verfahren zur Herstellung einer solchen Zahnbürste
DE10216641A1 (de) * 2002-04-15 2003-10-23 Trisa Holding Ag Triengen Zahnbürste und Verfahren zu deren Herstellung

Non-Patent Citations (1)

* Cited by examiner, † Cited by third party
Title
See references of WO2005048773A1 *

Also Published As

Publication number Publication date
EP1684612B1 (fr) 2008-12-31
DE10353541A1 (de) 2005-06-16
WO2005048773A1 (fr) 2005-06-02
DE502004008792D1 (de) 2009-02-12
DE10353541B4 (de) 2017-11-30

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