EP2078472B1 - Stempel zum Pressen von Faserbündeln - Google Patents

Stempel zum Pressen von Faserbündeln Download PDF

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Publication number
EP2078472B1
EP2078472B1 EP20090075002 EP09075002A EP2078472B1 EP 2078472 B1 EP2078472 B1 EP 2078472B1 EP 20090075002 EP20090075002 EP 20090075002 EP 09075002 A EP09075002 A EP 09075002A EP 2078472 B1 EP2078472 B1 EP 2078472B1
Authority
EP
European Patent Office
Prior art keywords
stamp
fibres
bundles
holder
hot
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
EP20090075002
Other languages
English (en)
French (fr)
Other versions
EP2078472A1 (de
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
Original Assignee
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
Priority claimed from BE200800020A external-priority patent/BE1017930A6/nl
Application filed by GB Boucherie NV filed Critical GB Boucherie NV
Publication of EP2078472A1 publication Critical patent/EP2078472A1/de
Application granted granted Critical
Publication of EP2078472B1 publication Critical patent/EP2078472B1/de
Not-in-force 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
    • A46D3/04—Machines for inserting or fixing bristles in bodies
    • A46D3/045—Machines for inserting or fixing bristles in bodies for fixing bristles by fusing or gluing to a body
    • 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
    • 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 present invention concerns stamps for pressing synthetic bundles of fibres on a holder, in particular for bundles of fibres of brushes.
  • a brush is formed of a body to which a number of bundles of fibres are fixed
  • the bundles of fibres are usually fixed to a holder which is partially or entirely part of the brush body, or in some cases it may be the brush body itself.
  • the holder contains holes in a certain pattern, whereby the diameter of the holes depends on the thickness of the fibre bundles, whereby holes of different diameters may be provided.
  • Bundles of fibres are hereby put in a holder by means of a device, and the holder is carried to what is called a fusion module via a revolving table in order to fasten the bundles of fibres by fusing the far ends of the bundles of fibres that protrude from the holder.
  • This fusing module can use different techniques, such as ultrasonic welding of the bundles of fibres.
  • Another, simpler technique consists of mechanically pressing the bundles of fibres in or on the holder by means of a heated stamp.
  • the far ends of the bundles of fibres are locally fused. If the far ends are long enough, a molten film can even be created between the heated stamp and the holder as the far ends of different bundles of fibres melt together. Next, the stamp is withdrawn and the molten far ends start to cure.
  • stamps are typically rather thin.
  • the stamps are heated up to a temperature which is dependent of the melting temperature of the material out of which the bundles of fibres are made, for example up to a temperature of 300°C, by sending a big electric current through them for a short duration, after which the stamps quickly cool down again.
  • This technique is described in EP 1,136,017 .
  • a disadvantage of this technique is that, due to the local melting, molten material may stick to the stamp and not to the holder as was intended, when the latter is withdrawn after the pressing. Thus, the bundles of fibres cannot be fixed that well to the holder. This disadvantage is all the more important as the holders get larger, and at present it bars this technique for household brushes.
  • the stamp can be covered with an anti-sticking layer, as was mentioned in EP 1,136,017 .
  • Another disadvantage is that the surface of the fused fibres is not entirely flat, such that covering with a cover plate or any other further processing, for example filling with injection moulding material, may be desirable or necessary.
  • a further disadvantage is that microscopically small holes and pores may still be present in the mass of the fused fibres, which may cause the injection moulding material to leak during any further processing.
  • the present invention aims to remedy one or several of the above-mentioned or other disadvantages.
  • the invention concerns a device for manufacturing brushes which consists of a positioning device on which is provided a holder, whereby a number of bundles of fibres are provided loosely in the holder, and a first stamp which is heated and with which the far ends of the bundles of fibres are pressed on, whereby it provides for a second stamp which is used for a final pressing and whose temperature is lower than that of the first stamp.
  • An advantage of the pressing with a colder stamp, to which nothing sticks, is that the fibre mass which has been plasticized beforehand can be connected more efficiently to the holder. This is also the case when it is made of another material than fibres, which normally only occurs when the fibres and holders are made of one and the same or a similar synthetic material which is compatible.
  • a further advantage is that, by pressing with the colder stamp, a smoother and more even surface of the solidified melt is obtained than if this was not the case.
  • injection pressures that are less high. Consequently, there will be less leakage of the injection moulding material.
  • Another advantage is that, by pressing with the second stamp, the fibre melt is compressed and is made more compact during the solidifying process. As a result, microscopically small holes and pores that might still be present in the melt are filled. This in turn results in a more homogenous fibre layer, so that there will be less leakage problems while injection moulding.
  • the hot first stamp is a stamp whose contact surface is at least partly made of carbon.
  • stamp with the aforesaid layer of carbon is that it can press the bundles of fibres on to a holder, after which the stamp can be withdrawn without any fibre bundle material sticking on the stamp.
  • brushes can be manufactured in a more efficient and cheaper way with this stamp, whereby less energy is consumed and the stamps have a longer lifetime.
  • the layer of carbon with which the stamp is provided is commonly more known as a layer of graphite.
  • Graphite is a form of carbon element carbon and one of the softest materials.
  • the crystalline structure is hexagonal. From an atomic point of view, it is formed of layers which can easily slide off one another. That is why it is also used as a dry lubricant.
  • Figure 1 schematically represents the first stamp 1 according to the invention, which in this case is made of solid graphite.
  • a layer of graphite with a certain thickness will be provided on the contact surface 2 of a stamp 1 which is part of a mechanical pressing device.
  • graphite containing copper provides very good results.
  • This composition which contains for example 20% of copper, is less brittle than pure graphite.
  • said contact surface 2 is provided with an embossed pattern, but this is not necessarily so and, in most cases, a flat contact surface 2 is preferred.
  • Figures 1 to 3 show that the first stamp 1 is close to a holder 3 in which has been provided an amount of fibre bundles 4 through the holder 3 and whereby the far ends 5 of the bundles of fibres 4 protrude on the side of the stamp 1.
  • the bundles of fibres 4 are hereby kept in place by a positioning device 6 and a device with pens 7.
  • the functioning of the first stamp 1 according to the invention is simple and as follows.
  • Figure 1 shows that the stamp 1 is brought towards the holder 3 in a direction A in order to press the bundles of fibres 4 on the holder 3 with its contact surface 2, as shown in figure 2 .
  • the stamp 1 is preferably heated, such that the far ends 5 of the bundles of fibres will locally fuse while the latter are being pressed on. Thus, the bundles of fibres 4 will be pressed onto the holder 3 in a more efficient way.
  • the stamp 1 may for example be heated by means of electric heating elements which are not represented in the figures and which are provided in or under the stamp.
  • the bundles of fibres 4 are formed for example of polyethylene terephthalate, polyvinyl chloride, polypropylene or nylon, and the bundles of fibres are either or not locally fused when at least their respective melting temperatures are reached.
  • the first stamp 1 is withdrawn in a direction B and removed from the holder 3, as shown in figure 2 .
  • Figure 3 also shows that, thanks to the embossed pattern on the contact surface 2, the bundles of fibres 4 can be pressed on in a cleaner way as they fuse locally in the cavities of the relief pattern.
  • the far ends 5 of the fibres of individual bundles of fibres 4 are hereby fused. It is also clear that the embossed pattern may have different shapes, depending on the desired pattern for the pressed-on material.
  • Figure 4 shows how the holder 3 with pressed-on bundles of fibres 4 can subsequently be covered with a cover plate 8, whereby the holder 3 may be part of a brush body or may be the brush body itself.
  • the cover plate 8 may be a separate part which is connected to the holder 3 by means of mounting, welding, gluing or other techniques, as is described for example in EP 0,972,464 .
  • the cover plate 8 is directly provided on the holder 3 by means of injection moulding, as described in EP 0,972,465 .
  • Figures 5 to 9 included schematically represent the successive steps of a method in which the stamp according to the invention is used, followed by a final pressing with a second stamp at a lower temperature.
  • Figure 5 shows how the first stamp 1 is brought to the holder 3 in a direction A so as to press the bundles of fibres 4 on the holder 3 with its contact surface 2, as shown in figure 6 .
  • the first stamp 1 is preferably heated, such that the far ends 5 of the bundles of fibres are locally fused while the stamp is being pressed on. As a result, the bundles of fibres 4 are pressed on the holder 3 more efficiently.
  • the stamp 1 will be withdrawn in a direction B and removed from the holder 3, as shown in figure 7 .
  • a colder second stamp 16 is used for the final pressing, as represented in figures 7 to 9 .
  • the device function according to this alternative embodiment is as follows.
  • the fusion by means of the heated first stamp 1 is followed by a final pressing with a second cold stamp 16.
  • a second cold stamp 16 for example made of a metal such as steel or copper, either or not cooled externally, and against which the fibre mass then cools down.
  • a further advantage is that, by pressing with the second stamp 16, a smoother and more even surface of the solidified melt is obtained than if this was not the case.
  • Another advantage is that, by pressing with the second stamp 16, the fibre melt is compressed and is made more compact during the solidifying process. As a result, microscopically small holes and pores that might still be present in the melt are filled. This in turn results in a more homogenous fibre layer, so that there will be less leakage problems while injection moulding.
  • Figure 5 shows a top view of material that has been pressed onto holder 3 and figure 6 also shows the bundles of fibres 4 in perspective. A specific pattern is used thereby which concentrates the bundles of fibres 4 on the outer side of the holder 3.
  • Figure 12 shows how the holder 3 of figure 11 is covered with a cover plate 8 containing a connecting opening 9 for a brush handle.

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

Claims (14)

  1. Vorrichtung zur Herstellung von Bürsten, welche aus einer Positioniereinrichtung (6) besteht, woran eine Halterung (3) angebracht wird, wobei eine Anzahl von Faserbündeln (4) lose in der Halterung (3) angebracht ist, und einem ersten Stempel (1), der beheizt wird und womit die Enden (5) der Faserbündel angedrückt werden, dadurch gekennzeichnet, dass sie einen zweiten Stempel (16) vorsieht, der für ein letztendliches Andrücken verwendet wird und dessen Temperatur niedriger als die des ersten Stempels (1) ist.
  2. Vorrichtung zur Herstellung von Bürsten nach Anspruch 1, dadurch gekennzeichnet, dass der zweite Stempel (16) gekühlt wird.
  3. Vorrichtung zur Herstellung von Bürsten nach einem der Ansprüche 1 oder 2, dadurch gekennzeichnet, dass die Kontaktfläche des zweiten Stempels (16) flach ist.
  4. Vorrichtung zur Herstellung von Bürsten nach Anspruch 1, wobei eine Halterung (3) auf einer Positioniereinrichtung (6) angebracht wird, und wobei eine Anzahl von Faserbündeln (4) lose in der Halterung (3) angebracht wird, wobei die Faserbündel (4) mit einem Ende (5) aus der Halterung (3) ragen, und wobei die Enden (5) der Faserbündel mit einem ersten Stempel (1) angedrückt werden, dessen Temperatur der Kontaktfläche (2) mindestens so hoch ist wie die Schmelztemperatur des Materials, woraus die Faserbündel (4) gefertigt sind, dadurch gekennzeichnet, dass unmittelbar, nachdem der heiße erste Stempel (1) benutzt wurde, ein zweiter, kühlerer Stempel (16) zum letztendlichen Andrücken verwendet wird.
  5. Vorrichtung zur Herstellung von Bürsten nach Anspruch 1, dadurch gekennzeichnet, dass der heiße erste Stempel (1) ein Stempel ist, dessen Kontaktfläche (2) mindestens teilweise aus Kohlenstoff besteht.
  6. Vorrichtung zur Herstellung von Bürsten nach Anspruch 1, dadurch gekennzeichnet, dass der heiße erste Stempel (1) ein Stempel ist, dessen Kontaktfläche (2) mindestens teilweise aus Kohlenstoff in Form von Graphit besteht.
  7. Vorrichtung zur Herstellung von Bürsten nach Anspruch 1, dadurch gekennzeichnet, dass der heiße erste Stempel (1) ein Stempel ist, dessen Kontaktfläche (2) mindestens teilweise aus Kupfer und Graphit zusammengesetzt ist.
  8. Vorrichtung zur Herstellung von Bürsten nach Anspruch 1, dadurch gekennzeichnet, dass der heiße erste Stempel (1) ein Stempel ist, dessen Kontaktfläche (2) mit einem eingeprägten Muster versehen ist.
  9. Vorrichtung zur Herstellung von Bürsten nach Anspruch 1, dadurch gekennzeichnet, dass der heiße erste Stempel (1) an der Kontaktfläche (2) flach ist.
  10. Vorrichtung zur Herstellung von Bürsten nach Anspruch 1, dadurch gekennzeichnet, dass der heiße erste Stempel (1) bis auf eine Temperatur erhitzt wird, die mindestens die Schmelztemperatur des Materials ist, woraus die Faserbündel (4) hergestellt sind.
  11. Vorrichtung zur Herstellung von Bürsten nach Anspruch 1, dadurch gekennzeichnet, dass der heiße erste Stempel (1) mittels eines oder mehrerer elektrischer Heizelemente beheizt wird.
  12. Vorrichtung zur Herstellung von Bürsten nach Anspruch 1, dadurch gekennzeichnet, dass der heiße erste Stempel (1) als massiver Kohlenstoffblock ausgeführt ist.
  13. Vorrichtung zur Herstellung von Bürsten nach Anspruch 1, dadurch gekennzeichnet, dass der heiße erste Stempel (1) an der vorgenannten Kontaktfläche (2) des Stempels mit Kohlenstoff beschichtet ist.
  14. Vorrichtung zur Herstellung von Bürsten nach Anspruch 1, dadurch gekennzeichnet, dass der heiße erste Stempel mittels einer Spritzgusstechnik mit Kohlenstoff beschichtet ist.
EP20090075002 2008-01-10 2009-01-05 Stempel zum Pressen von Faserbündeln Not-in-force EP2078472B1 (de)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
BE200800020A BE1017930A6 (nl) 2008-01-10 2008-01-10 Stempel voor het aandrukken van vezelbundels.
BE200800178A BE1018061A6 (nl) 2008-01-10 2008-03-25 Stempel voor het aandrukken van vezelbundels.

Publications (2)

Publication Number Publication Date
EP2078472A1 EP2078472A1 (de) 2009-07-15
EP2078472B1 true EP2078472B1 (de) 2010-02-24

Family

ID=40651528

Family Applications (1)

Application Number Title Priority Date Filing Date
EP20090075002 Not-in-force EP2078472B1 (de) 2008-01-10 2009-01-05 Stempel zum Pressen von Faserbündeln

Country Status (2)

Country Link
EP (1) EP2078472B1 (de)
DE (1) DE602009000006D1 (de)

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE102010025852A1 (de) * 2010-07-02 2012-03-29 Gb Boucherie Nv Verfahren und Vorrichtung zum Herstellen von Bürsten
DE102012005311A1 (de) 2012-03-19 2013-09-19 Zahoransky Ag Vorrichtung zum Herstellen von Bürsten oder Borstenwaren, sowie Bürste oder Borstenware
US11497302B2 (en) 2017-10-24 2022-11-15 Koninklijke Philips N.V. Brush head manufacturing method and device

Families Citing this family (10)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
BE1018439A3 (nl) * 2009-02-04 2010-11-09 Gb Boucherie Nv Methode voor het produceren van ankerloze borstels, meer bepaald tandenborstels.
JP2012000148A (ja) * 2010-06-14 2012-01-05 Panasonic Electric Works Co Ltd ブラシ体およびこれを備えた歯ブラシ
CN104363791B (zh) * 2012-06-12 2016-09-14 博朗有限公司 刷头以及用于制备所述刷头的方法和工具
EP2674061B1 (de) * 2012-06-12 2017-07-19 Braun GmbH Verfahren und Werkzeug zur Herstellung eines Bürstenkopfs
EP2928340B1 (de) 2012-12-10 2017-02-15 Colgate-Palmolive Company Mundpflegevorrichtung
DE102016107759A1 (de) * 2015-07-13 2017-01-19 Gb Boucherie Nv Verfahren und Vorrichtung zum Herstellen einer Bürste
BE1023148B1 (nl) * 2015-07-13 2016-12-01 Bart Gerard Boucherie Verfahren und Vorrichtung zum Herstellen einer Bürste
BE1023625B1 (de) * 2016-01-12 2017-05-19 Bart Gerard Boucherie Verfahren und Vorrichtung zum Herstellen einer Bürste
JP6920346B2 (ja) * 2016-04-26 2021-08-18 ヘーベー・ブシュリー・ナムローゼ・フェンノートシャップＧＢ Ｂｏｕｃｈｅｒｉｅ ＮＶ ブラシを製造する方法と装置
US11723453B2 (en) * 2017-12-12 2023-08-15 Koninklijke Philips N.V. Brush head assembly and methods of manufacture

Family Cites Families (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE69915180T2 (de) 1998-07-14 2004-12-30 Firma G.B. Boucherie N.V. Verfahren zum Herstellen von Bürsten sowie Bürstenherstellungsmaschine zur Durchführung dieses Verfahrens
EP1136017B1 (de) 2000-03-21 2003-06-25 G.B. Boucherie, N.V. Verfahren und Vorrichtung zum Verschmelzen von Faserenden
US7858188B2 (en) * 2005-12-14 2010-12-28 Dupont-Mitsui Fluorochemicals Co Ltd Non-stick coating composition comprising diamond particles and substrate

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE102010025852A1 (de) * 2010-07-02 2012-03-29 Gb Boucherie Nv Verfahren und Vorrichtung zum Herstellen von Bürsten
DE102012005311A1 (de) 2012-03-19 2013-09-19 Zahoransky Ag Vorrichtung zum Herstellen von Bürsten oder Borstenwaren, sowie Bürste oder Borstenware
DE102012005311B4 (de) 2012-03-19 2021-08-12 Zahoransky Ag Vorrichtung zum Herstellen von Bürsten oder Borstenwaren, sowie Bürste oder Borstenware
US11497302B2 (en) 2017-10-24 2022-11-15 Koninklijke Philips N.V. Brush head manufacturing method and device

Also Published As

Publication number Publication date
EP2078472A1 (de) 2009-07-15
DE602009000006D1 (de) 2010-04-08

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