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EP0779046B1 - Verfahren und Vorrichtung zum Abrunden von Borstenbürsten - Google Patents

Verfahren und Vorrichtung zum Abrunden von Borstenbürsten Download PDF

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Publication number
EP0779046B1
EP0779046B1 EP19960200288 EP96200288A EP0779046B1 EP 0779046 B1 EP0779046 B1 EP 0779046B1 EP 19960200288 EP19960200288 EP 19960200288 EP 96200288 A EP96200288 A EP 96200288A EP 0779046 B1 EP0779046 B1 EP 0779046B1
Authority
EP
European Patent Office
Prior art keywords
fibres
brush
friction
rounding
brush fibres
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.)
Expired - Lifetime
Application number
EP19960200288
Other languages
English (en)
French (fr)
Other versions
EP0779046A1 (de
Inventor
Bart G. 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
Application filed by GB Boucherie NV filed Critical GB Boucherie NV
Priority to DE29614118U priority Critical patent/DE29614118U1/de
Priority to US08/766,776 priority patent/US5893612A/en
Publication of EP0779046A1 publication Critical patent/EP0779046A1/de
Application granted granted Critical
Publication of EP0779046B1 publication Critical patent/EP0779046B1/de
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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Classifications

    • A—HUMAN NECESSITIES
    • A46—BRUSHWARE
    • A46D—MANUFACTURE OF BRUSHES
    • A46D9/00—Machines for finishing brushes
    • A46D9/02—Cutting; Trimming

Definitions

  • the present invention concerns a method and device for rounding fibres of brushes.
  • the ends of the brush fibres are rounded by putting them in contact with a moving grinding element.
  • This grinding element can be a grinding strip or a grinding disc as described in EP-A-0.019.944.
  • the grinding is usually carried out in a relatively large number of steps, for example some five to ten steps, with an increasing grain fineness of the grinding surface, and it is usually followed by a polishing stage.
  • the invention aims a method and a device used with it with which the rounding process can be carried out in a simple and a relatively fast manner with a very good result.
  • the invention concerns a method for rounding brush fibres of thermoplastic material, by bringing the ends of the fibres in contact with a treatment surface which moves relative to the brush fibres and by heating the ends of the fibres up to a temperature at which they are rounded by thermoplastic deformation due to the contact with said treatment surface, characterised in that the rounding of the fibre ends is essentially realised by using a friction element which is provided with a friction surface which is less coarse than the surface of abrasive or grinding elements and in that the rounding of the fibres is created mainly through the heat developed by the contact between the fibres and said surface.
  • the required rounding can be obtained in one step or in a limited number of steps which is significantly lower than the number of steps required for the grinding.
  • the speed at which the heating up caused by friction takes place not only depends on the friction surface of the friction element, but also on the speed of the relative movement which can be selected relatively fast.
  • a device comprising a friction element which is provided with a friction surface, means to put the thermoplastic brush fibres and the friction element in contact with one another and means to create a relative movement between the friction surface and the brush fibres, said device being characterised in that the friction surface is less coarse than the surface of abrasive or grinding elements and provides in that the rounding of the fibres is created mainly through the heat developed by the contact between the fibres and said surface.
  • the device mainly consists of a frame which is equipped with one or several slidable carriages, whereby one or several supports are fixed on each carriage, displaceable in the longitudinal direction of the brush fibres, and whereby one or several supports are coupled to the frame by means of a cam drive and whereby a friction element is mounted in a rotatable manner on each support.
  • these ends are heated up in one or several steps by means of friction as a result of a fast relative movement of a friction element with a suitable friction surface against these brush fibres, up to a temperature at which these ends obtain a rounding due to the contact with the friction element.
  • the friction element hereby makes such a movement that the frictional direction changes continuously and evenly, such as for example a movement as described in Belgian patent application No. 9400745 of 17 August 1994, or such that all points on this friction element simultaneously follow identical circular courses as described in Belgian patent application No. 9500402 of 4 May 1995.
  • these ends are preferably heated up until they soften, and, to the limit, possibly slightly melt on the surface.
  • Both the brush and the friction element can be moved, but the brush is preferably maintained stationary whereas the friction element is moved.
  • This friction element can be a rotating disc, a rotating drum, a moving flat plate or an endless belt as described in Belgian patent No. 1.007.111.
  • the drum barrel will be preferably cylindrically shaped, barrel-shaped and/or profiled, for example fluted.
  • the brush fibres can be directed for example vertically with their ends up or with their ends down.
  • this friction element touches the brush fibres with a friction surface which has the appropriate structure to sufficiently heat up the ends of these brush fibres by means of friction, at the selected relative speed of the friction element on the spot where contact is made with the brush fibres, and to round the heated ends, thanks to an appropriate variation of the frictional direction.
  • This friction surface is usually less coarse than the surface of abrasive or grinding elements and is preferably made of a material which does not conduct the heat well, such as for example a material on a synthetic basis, so as not to remove the created frictional heat prematurely.
  • the required heat level can be obtained or maintained by supplying heat from outside, for example by heating the friction body.
  • the friction element can be entirely made of the appropriate material, or it can be provided with a layer or covering of such material on the outside. Said friction element may also have obtained the required friction surface thanks to a special treatment of its surface.
  • the frictional heat can also be supported by a directed heat supply from outside.
  • the brush fibres can be either or not cooled between the steps.
  • the figures represent a device which applies the method according to the invention and which mainly consists of a complete finishing unit 1 for brushes which contain a series of holders 2 for brush bodies 3 in which brush fibres 4 are fixed.
  • Every holder 2 can hereby hold one brush body 3, but according to another embodiment, also two or more brush bodies 3 can be provided per holder 2.
  • the above-mentioned holders 2 are provided on a frame 5 upon which are mounted an endless conveyor belt 6, a device 7 for warping the brush fibres 4 and a device 8 for rounding the free ends of these brush fibres 4.
  • the devices 7 and 8 are erected along the conveyor belt 6, for example as represented in the figures along the lower end thereof.
  • the holders 2 are applied on the conveyor belt 6.
  • the device 7 for warping the ends of the brush fibres 4 consist of one or several moveable warping units 9 which may be of a known construction. These warping units 9 are equipped with control elements 10, such that the warping plane 11 of each warping unit 9 can be adjusted in height. By means of these control elements 10, the brush fibres 4 can be warped according to a certain length.
  • brushes can be either cut off flat or with a certain profile.
  • fibres can also be cut off at two or more different length levels.
  • the device 8 for rounding the ends of the brush fibres 3 contains one or several rounding units 12 which each contain a friction element 13 provided with a suitable friction surface 14 and means 15 to put the friction surfaces 14 and the brush fibres 4 in contact with one another in an appropriate way, and means 16 to create a relative movement of the friction surfaces 14, when in contact with the brush fibres 4, in relation to the brush fibres 4.
  • the friction element 13 consists of a round drum 17 whose perimeter forms the above-mentioned friction surface 14 and whose axial length or width practically coincides with the length of the part of the brush body 3 which is provided with fibres 4.
  • the drum 17 is fixed on a shaft 18 which can rotate in a drum 19.
  • This shaft 18 is situated in a plane which is parallel to the part of the brush body 3 which is equipped with brush fibres 4 to be rounded.
  • the support 19 is in turn fixed on a shaft 20 which can rotate in a casing 21.
  • This shaft 20 is parallel to or almost parallel to the direction of the above-mentioned brush fibres 4 and preferably runs through the centre of the above-mentioned drum 17.
  • each rounding unit 12 is fixed to a carriage 23 by means of a connecting element 22 which can be moved in the longitudinal direction of the brush fibres 4.
  • a connecting element 22 which can be moved in the longitudinal direction of the brush fibres 4.
  • To each connecting element 22 are fastened one or several casings 21, such that each casing 21 can be adjusted individually by means of a control element 24 in the longitudinal direction of the brush fibres 4.
  • Several or all connecting elements 22 of the device 8 can be coupled to one another.
  • the above-mentioned carriage 23 is provided in a slidable manner on a guide 25 which is fixed on the frame 5, such that the carriage 23 can slide in a direction which is parallel to the longitudinal direction of the part of the brush bodies 3 which is filled with brush fibres 4.
  • the connecting elements 22 can be moved in the longitudinal direction of the brush fibres 4 in relation to the carriage 23 by means of a cam drive 26 consisting of a buffer shaft 27 which is mounted slidable in the longitudinal direction of the brush fibres 4 to the carriage 23 and which is equipped with a cam follower 28 which cooperates with a cam 29 fixed on the frame 5.
  • a cam drive 26 consisting of a buffer shaft 27 which is mounted slidable in the longitudinal direction of the brush fibres 4 to the carriage 23 and which is equipped with a cam follower 28 which cooperates with a cam 29 fixed on the frame 5.
  • several cam drives 26 can be provided whose cams 29 have the same active surface.
  • crank mechanism 30 whose crankshaft is driven by an electric motor 31 which is fixed to the frame 5.
  • the transmissions 34 and 35 are for example a couple of belt transmissions.
  • the transmissions 35 are preferably made such that the drums 17 of neighbouring rounding units 12 turn in the opposite sense.
  • the conveyor belt 6 and the cam drive 30 are part of the above-mentioned means 15 to put the friction surface 14 in contact with the brush fibres 4.
  • the casing 21 with the support 19, the connecting element 22 and the motors 32 and 33 with the transmissions 34 and 35 are part of the above-mentioned means 16 which make it possible to realize a relative movement of the friction surface 14 in relation to the brush fibres 4.
  • the carriage 23 which can slide over the guide 25, the crank mechanism 30 and the motor 31 are common to the above-mentioned means 15 and 16.
  • the working of the finishing unit 1 is simple and as follows.
  • the brush bodies 3, filled with brush fibres 4 are successively provided opposite the warping units 9, where the brush fibres 4 are put in contact with the warping planes 11 and are warped in one or several steps, and are subsequently provided opposite the rounding units 12, where they are rounded in one or several steps.
  • the drum 17 of the corresponding rounding unit 12 is rotated via the transmission 34 through the motor 33 around the shaft 18, whereas the drum 17 is rotated via the transmission 34 through the motor 32 around the shaft 20.
  • the drum 17 and thus the friction surface 14 are also moved in the longitudinal direction of the part of the brush body 3 which is filled with brush fibres 4 thanks to the to-and-fro movement of the carriage 23 which is caused via the crank mechanism 30 by the motor 31.
  • the rotational speed of the motors 31-32-33 can be controlled separately and continuously by means of for example a frequency regulator.
  • the warping units and the rounding units can be alternately erected at random.
  • one or several warping units can be each time followed directly by one or several rounding units, and then again one or several warping units can be followed by rounding units, etc.
  • the brush fibres can be spread such by means of spreading elements that the operating units can be adjusted for the short fibres without touching the long fibres.
  • the above-described method can also be used for rounding loose brush fibres, either in bundles or wound on bobbins, before fixing them in or on a brush body.

Landscapes

  • Polishing Bodies And Polishing Tools (AREA)
  • Treatment Of Fiber Materials (AREA)
  • Brushes (AREA)

Claims (15)

  1. Verfahren zum Abrunden von Bürstenborsten aus thermoplastischem Material, indem die Enden der Borsten (4) mit einer Behandlungsfläche (14), die sich relativ zu den Bürstenborsten (4) bewegt, in Kontakt gebracht werden und indem die Enden der Borsten (4) bis auf eine Temperatur erwärmt werden, auf der sie durch thermoplastische Verformung abgerundet werden können, dadurch gekennzeichnet, dass das Abrunden der Borstenenden hauptsächlich durch Verwendung eines Friktionselements (13) verwirklicht wird, das mit einer Friktionsoberfläche (14) versehen ist, die weniger rau als die Oberfläche von Abschleif- oder Schleifelementen ist, und dass die Rundung der Borsten (4) hauptsächlich durch die durch den Kontakt zwischen den Borsten (4) und besagter Fläche (14) entwickelte Wärme erzeugt wird.
  2. Verfahren gemäß Anspruch 1, dadurch gekennzeichnet, dass die Enden bis auf eine Temperatur erwärmt werden, auf der diese Enden an ihrer Oberfläche weich werden.
  3. Verfahren gemäß Anspruch 2, dadurch gekennzeichnet, dass die Enden bis auf eine Temperatur erwärmt werden, auf der diese Enden an ihrer Oberfläche etwas zu schmelzen beginnen.
  4. Verfahren gemäß einem der vorangehenden Ansprüche, dadurch gekennzeichnet, dass das Friktionselement und die relative Bewegung so gewählt sind, dass die Reibungsrichtung der relativen Bewegung der Friktionsoberfläche in Bezug zu den Bürstenborsten kontinuierlich und gleichmäßig verändert wird.
  5. Verfahren gemäß einem der Ansprüche 1 bis 3, dadurch gekennzeichnet, dass das Friktionselement und die relative Bewegung so gewählt sind, dass alle Punkte der Friktionsoberfläche simultan identischen Bahnen folgen.
  6. Verfahren gemäß einem der vorangehenden Ansprüche, dadurch gekennzeichnet, dass die Reibung auf den Bürstenborsten von einer Friktionsoberfläche verursacht wird, die aus einem Material hergestellt ist, das kein guter Wärmeleiter ist.
  7. Verfahren gemäß Anspruch 6, dadurch gekennzeichnet, dass die Reibung von einer Friktionsoberfläche auf Synthetikbasis erzeugt wird.
  8. Verfahren gemäß einem der vorangehenden Ansprüche, dadurch gekennzeichnet, dass die relative Bewegung mit einer relativ großen Geschwindigkeit ausgeführt wird, abhängig von der Friktionsoberfläche des Friktionselements und der Art der Bürstenborsten.
  9. Verfahren gemäß einem der vorangehenden Ansprüche, dadurch gekennzeichnet, dass die Bürstenborsten stationär gehalten werden, während das Friktionselement bewegt wird.
  10. Vorrichtung zum Abrunden von Bürstenborsten aus thermoplastischem Material, welche ein Friktionselement (13) umfasst, das mit einer Friktionsoberfläche (14) versehen ist, Mitteln (15), um die thermoplastischen Bürstenborsten (4) und das Friktionselement (13) miteinander in Kontakt zu bringen, und Mitteln (16) zur Erzeugung einer relativen Bewegung zwischen der Friktionsoberfläche (14) und den Bürstenborsten (4), dadurch gekennzeichnet, dass die Friktionsoberfläche (14) weniger rau ist als die Oberfläche von Abschleif- oder Schleifelementen und dafür sorgt, dass die Abrundung der Borsten (4) hauptsächlich durch die durch den Kontakt zwischen den Fasern (4) und besagter Oberfläche (14) entwickelte Wärme erzeugt wird.
  11. Vorrichtung gemäß Anspruch 10, dadurch gekennzeichnet, dass die Friktionsoberfläche (14) und die Mittel (16) zur Erzeugung einer relativen Bewegung oder dergleichen so bewegt werden, dass die Reibungsrichtung kontinuierlich und gleichmäßig verändert wird.
  12. Vorrichtung gemäß Anspruch 10 oder 11, dadurch gekennzeichnet, dass das Friktionselement (13) eine Friktionsoberfläche (14) hat, die kein guter Wärmeleiter ist.
  13. Vorrichtung gemäß einem der Ansprüche 10 bis 12, dadurch gekennzeichnet, dass sie hauptsächlich aus einem Rahmen (5) besteht, der mit einem oder mehreren bewegbaren Schlitten (23) ausgestattet ist, wobei ein oder mehrere Träger (19) auf jedem Schlitten (23) befestigt sind, die in der Längsrichtung der Bürstenborsten (4) verschiebbar sind, und wobei ein oder mehrere Träger (19) mittels eines Nockentriebs (26) mit dem Rahmen (5) gekoppelt sind und wobei ein Friktionselement (13) rotierbar auf jedem Träger (19) montiert ist.
  14. Vorrichtung gemäß Anspruch 13, dadurch gekennzeichnet, dass einer oder mehrere Träger (19) rotierbar am Schlitten (23) befestigt sind, gemäß einer Achse (20), die parallel oder nahezu parallel zur Längsrichtung der Bürstenborsten (4) ist, wobei auf jedem Träger (19) ein Friktionselement (13) rotierbar gemäß einer Achse (18) fixiert ist, die sich in einer Ebene befindet, die parallel zu dem mit Bürstenborsten (4) versehenen Teil des Bürstenkörpers (3) verläuft.
  15. Vorrichtung gemäß Anspruch 13 oder 14, dadurch gekennzeichnet, dass der Nockentrieb (26) hauptsächlich aus einer Pufferwelle (27) besteht, der in Längsrichtung der Bürstenfasern (4) verschiebbar am Schlitten (23) montiert ist und der mit einem Nockenstößel (28) ausgerüstet ist, der mit der aktiven Oberfläche einer auf dem Rahmen (5) befestigten Nocke (29) zusammenwirkt.
EP19960200288 1995-12-13 1996-02-09 Verfahren und Vorrichtung zum Abrunden von Borstenbürsten Expired - Lifetime EP0779046B1 (de)

Priority Applications (2)

Application Number Priority Date Filing Date Title
DE29614118U DE29614118U1 (de) 1995-12-13 1996-08-14 Vorrichtung zum Abrunden von Borstenenden bei Bürsten
US08/766,776 US5893612A (en) 1995-12-13 1996-12-13 Apparatus and method for rounding fiber ends of brushes

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
BE9501032 1995-12-13
BE9501032A BE1009884A3 (nl) 1995-12-13 1995-12-13 Werkwijze en inrichting voor het afronden van borstelvezels.

Publications (2)

Publication Number Publication Date
EP0779046A1 EP0779046A1 (de) 1997-06-18
EP0779046B1 true EP0779046B1 (de) 2000-11-02

Family

ID=3889350

Family Applications (1)

Application Number Title Priority Date Filing Date
EP19960200288 Expired - Lifetime EP0779046B1 (de) 1995-12-13 1996-02-09 Verfahren und Vorrichtung zum Abrunden von Borstenbürsten

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Country Link
EP (1) EP0779046B1 (de)
BE (1) BE1009884A3 (de)
DE (1) DE69610810T2 (de)
ES (1) ES2153535T3 (de)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US7699403B2 (en) 2003-02-05 2010-04-20 The Gillette Company Method and apparatus for making toothbrushes

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB2328148B (en) * 1997-08-12 2001-11-07 Boucherie Nv G B A method of endrounding loose fibres
KR100900805B1 (ko) * 2008-10-27 2009-06-04 주식회사 베스트화성 기계적 방법에 의한 칫솔모의 테이퍼 가공방법

Family Cites Families (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2426328A (en) * 1943-06-05 1947-08-26 Lever Brothers Ltd Method of finishing plastic filaments, and products made therefrom
US2587792A (en) * 1946-08-15 1952-03-04 Sivers Carl Henric Von Method for rounding the tips of bristles
BE442233A (de) * 1950-01-11
DE9107687U1 (de) * 1991-06-21 1991-08-14 Anton Zahoransky GmbH & Co., 79674 Todtnau Bearbeitungsmaschine für Bürsten

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US7699403B2 (en) 2003-02-05 2010-04-20 The Gillette Company Method and apparatus for making toothbrushes

Also Published As

Publication number Publication date
DE69610810D1 (de) 2000-12-07
ES2153535T3 (es) 2001-03-01
EP0779046A1 (de) 1997-06-18
BE1009884A3 (nl) 1997-10-07
DE69610810T2 (de) 2001-04-05

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