EP0405204B1 - Verfahren und Vorrichtung zum Herstellen von Borstenfeldern oder Borstenbündeln - Google Patents

Verfahren und Vorrichtung zum Herstellen von Borstenfeldern oder Borstenbündeln Download PDF

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Publication number
EP0405204B1
EP0405204B1 EP90110871A EP90110871A EP0405204B1 EP 0405204 B1 EP0405204 B1 EP 0405204B1 EP 90110871 A EP90110871 A EP 90110871A EP 90110871 A EP90110871 A EP 90110871A EP 0405204 B1 EP0405204 B1 EP 0405204B1
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EP
European Patent Office
Prior art keywords
bristles
tufts
bristle
holes
holding plate
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
EP90110871A
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German (de)
English (en)
French (fr)
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EP0405204A3 (en
EP0405204A2 (de
Inventor
Fritz Rueb
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.)
FRISETTA GMBH
Original Assignee
Frisetta 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
Priority claimed from DE19893920769 external-priority patent/DE3920769A1/de
Application filed by Frisetta GmbH filed Critical Frisetta GmbH
Publication of EP0405204A2 publication Critical patent/EP0405204A2/de
Publication of EP0405204A3 publication Critical patent/EP0405204A3/de
Application granted granted Critical
Publication of EP0405204B1 publication Critical patent/EP0405204B1/de
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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    • 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
    • A46D—MANUFACTURE OF BRUSHES
    • A46D1/00—Bristles; Selection of materials for bristles
    • A46D1/08—Preparing uniform tufts of bristles
    • A—HUMAN NECESSITIES
    • A46—BRUSHWARE
    • A46D—MANUFACTURE OF BRUSHES
    • A46D3/00—Preparing, i.e. Manufacturing brush bodies
    • A46D3/08—Parts of brush-making machines
    • A46D3/082—Magazines for bristles; Feeding bristles to magazines; Knot picking

Definitions

  • the invention relates to a method for producing bristle fields for brushes or bristle bundles for brushes, bristle tufts being filled into perforations in molds, the bristle tufts first being formed from individual bristles by separating a bristle supply into bristle tufts, after which the bristles are tied with the shape With the help of an air stream and introduced into the holes in the mold.
  • the invention further relates to a device for producing bristle fields for brushes or of bristle bundles for brushes, in which the ends of individual plastic bristles of a bristle bush are fused to one another and / or to those of a neighboring tuft, with a perforated shape in which perforations one tuft of bristles fits, feed lines are provided to the mold and a line leads to each hole to be filled, to which lines means for generating an air flow to the mold can be connected.
  • Trimmed bristles have therefore been subjected to a subsequent processing, by means of which the later working end of each bristle is to be rounded off more or less. However, this is only possible and only within limits if an overall flat bristle field is present or is retained.
  • tufts of bristles must first be separated and fused before they can then be brought into a mold with compressed air, where their fused ends have to be encapsulated again.
  • the method of the type mentioned is characterized in that the air flow for conveying the bristle tufts is generated with negative pressure and that the ends of the bristles facing away from the later free working ends are then fused after being introduced into the perforations in the mold.
  • the later work ends can be rounded off before they are brought into the mold.
  • the tuft of bristles that have not yet been fused can be transported into a mold with the aid of the negative pressure, where the fusion and connection takes place , so that a higher production speed is possible.
  • the bristles can be transported into the mold more cheaply and more quickly. Even relatively long conveyor lines can be overcome in this way. Since the flow is caused by negative pressure and not, as in other air or gas conveyances, by positive pressure, more favorable flow conditions are possible in which mutual turbulence of the individual bristles or even jams can be avoided.
  • the bristles can be introduced into the mold in an approximately vertical orientation. This has the advantage that the insertion of the bristles into the mold can be supported by gravity.
  • the tufts of bristles are matched by one placed on the mold Perforations such as the mold-equipped holding plate are sucked through, after which the ends of the bristles to be fused protrude beyond the plate or at least protrude into a perforation area which widens towards the top of the plate, and when these bristles are joined together and / or with the plate or with these protrusions protruding in the same direction as the protruding ends of the bristles and optionally fused to the ends of the neighboring bristle tufts.
  • the tufts of bristles can be sucked into the mold insofar as, above all, perforations of this holding plate widening against the direction of suction, specifically guide the individual tufts into the perforations of the half-shape and allow them to enter.
  • the ends of the tufts of bristles to be connected are held together well and the heat of fusion to be applied at these ends is kept away from those areas of the bristles which are not to be fused together.
  • this holding plate allows a better connection to a later brush body or may even be the brush body itself under certain circumstances.
  • each individual bristle of a tuft of bristles remains free of the neighboring bristle, so that the elasticity of the individual bristles is completely retained despite the fusion and connection above or in the holding plate below it.
  • a further improvement and refinement of the method according to the invention for the mutual fixing of the individual bristles with one another and also with the holding plate can be achieved by utilizing the conveyance of the bristles by means of negative pressure in the mold in that the still soft or pasty melt after the ends of the bristles have melted pressurized, in particular underpressure, and thereby pressed or sucked at least partially into spaces between the bristles and / or between them and the holding plate located within the holding plate.
  • the melt can thus further stabilize the bristle areas located within the holding plate and, above all, seal the spaces between bristles in such a way that no bacteria and no toothpaste sludge can penetrate.
  • the negative pressure that is also used for conveying into the mold can be used.
  • the holding plate can be connected to a brush body, in particular welded, high-frequency welded, glued, permanently locked or screwed.
  • a brush body in particular welded, high-frequency welded, glued, permanently locked or screwed.
  • the bristle field can then be ejected from the mold together with the holding plate or with the brush body.
  • Differently colored bristle tufts are also possible within a bristle field, so that the brush manufacturer has the possibility of influencing the aesthetic effect of the brush by means of differently colored bristle tufts. For example, by using only a single bristle tuft with a color different from that of the other bristle tufts, the brush can be identified.
  • the working speed and in particular the speed when filling the mold is not impaired and, since no mechanical means of transport are used to transfer the tufts of bristles into the mold, but instead a gas flow generated by negative pressure is also a problem-free transfer without congestion, upsetting and without transverse laying of individual bristles, for example at pipe bends or at the mouth entry into the recess of the mold, especially when the negative pressure is applied to the mold, so that the negative pressure automatically directs the bristles into the mold, so that all bristles thereby and by the possibility of a bristle field into the mold via corresponding parallel vacuum lines, very high working speeds are possible.
  • the device according to the invention of the type mentioned at the outset is characterized in that the mouths of the lines and the shape can be moved relative to one another and that the shape has a connection for applying a vacuum to the individual perforations.
  • both the pipe mouths and the molds can be movable, so that the molds can be transported to a melting station after filling, for example in a manner to be described, while a new mold can already be made in the area of the pipe mouths.
  • the guide lines can be at their introductory point, at which the bristles are sucked into the lines, or at a distance from one another be adjustable, in which the tufts of bristles are provided before they are inserted into the mold, and the outlets or openings of the lines can be provided or adjustable in the position of use in the distance and the arrangement that corresponds to the hole arrangement of the mold and / or a holding plate. Since each bristle tuft has its own feed line to the corresponding perforation of the mold after it has been formed from a bristle stock, any geometric arrangements of the bristle tufts with respect to one another can be formed in this way and any shape can be loaded, in that the lines can be adjusted accordingly.
  • An expedient embodiment of the device is that at least one bristle magazine can be provided, in which the individual bristles are pressed against a displaceable and / or rotatable removal slide, and that the removal slide movable transversely to the removal is arranged at a distance from one another, the bristle supply has facing, open recesses for forming tufts of bristles and, with its region having these recesses, is displaceable or rotatable from the bristle magazine to below the individual openings of the lines.
  • the respective bristle tufts can thus be formed in a very simple manner with the aid of such a removal slide, in whose open-ended recesses or recesses corresponding to the shape and size of the later bristle tufts, in the edge facing the bristle stock, and transferred to the inlet area of the suction lines, whereby After exiting the bristle magazine, the corresponding counterholders close the open-edge recesses with the individual tufts of bristles.
  • the individual openings of the suction lines can be or are oriented in a simple manner to those locations in which the tufts of bristles are located after removal with the aid of the slide. Simple and quick back and forth movements of this slider are therefore sufficient to form the desired tufts of bristles from a supply of individual bristles and to position them so that they can be sucked into the mold in the manner already mentioned.
  • Hoses and / or pipes can be provided as lines, and in particular in the area of the introduction end and / or the mouth, the lines can be flexible for the adjustability of these areas. This facilitates the adjustment and mobility already mentioned, particularly in the mouth areas.
  • Embodiments of the feed lines and in particular their inlet openings and also the outlets are the subject of claims 10 and 11.
  • the measures specified therein on the one hand facilitate the safe suction of all bristles of a tuft of bristles and on the other hand the assignment to a holding plate and its perforation pattern.
  • the flow velocity of the air or gas flow caused by the negative pressure is increased depending on the degree of constriction, so that the bristles enter the perforation of the mold at a correspondingly high speed and with a correspondingly high momentum and, due to their ends which have already been sphered, become tangled can slide between bristles already in the perforation. If one or the other bristle no longer gets into the perforation, it can still be used the subsequent fusion process may be advantageous because it can then be fused with the protruding and fused ends of the filled bristles.
  • a further embodiment of the device of very significant importance can consist in that the perforations for receiving the tufts of bristles are blind holes, the bottoms or inner end faces of which have a negative shape or contour for shaping the ends of the respective tufts of bristles and, for example, as a hollow cone or - pointed, hollow hemisphere, bevel, level or a combination of these hollow shapes are formed.
  • the geometric shape of its later working end can be produced at the same time, so that trimming the working ends of the tufts of bristles is no longer necessary after they have been combined into bristle fields and the working ends of the individual bristles can therefore be rounded off from the beginning.
  • a suction channel can emerge laterally, possibly at right angles, from all the bores or perforations of the mold, above their bottom, and these channels can lead to the suction connection and can be combined.
  • the suction pressure is maintained right into the interior of the perforations in the mold, but without individual bristles being able to be drawn into the suction channels, as would be possible with a connection in the extension of the perforations in the mold.
  • suction connections can be that the bottoms of the perforations in the mold in a porous insert, in particular in a ceramic insert, sinter insert, sieve, felt, textiles or the like. are provided, under which one with the vacuum connection connected or provided chamber or the like is provided.
  • the negative pressure can be applied directly in the extension of the individual perforations, since the pores of such a porous insert are much smaller than the cross section of a single bristle.
  • the bottoms of the individual perforations can be stamped from the front side of the perforations be formed, which are arranged deeper when filling than when the bristles melt and can be raised to a height corresponding to the exact tuft length, possibly via the suction channels of the perforations.
  • the suction channels can be relatively deep, so that the bristles are sucked deep into the holes. If, however, due to a certain distance of the suction channels from the perforated floor, one or the other bristle does not initially reach this floor, this is nevertheless accomplished by the subsequent lifting of the floors.
  • a further embodiment of the invention of its own worthy of protection can consist in a device of the type mentioned in the fact that the bottoms of the holes or holes of the shape are corrugated or profiled or roughened, with individual bristles between the ridges formed and others on these ridges fit so that the individual bristles of a bristle tuft at its free working end have slightly different lengths. It has been shown that a much better cleaning result can be achieved with such toothbrushes, in which not only the working end of the entire bristle tuft has a favorable geometric shape, but also in which the individual bristles of a bristle tuft are not all exactly on the surface of this geometric Form, but each have slightly different lengths, so that individual bristles protrude slightly from neighboring bristles.
  • Claim 18 specifies a configuration with which several shapes can be loaded with bristles in the same advantageous manner at the same time, so that an even more rational and faster brush production is possible.
  • the measure of claim 19 also contributes to this, but also includes a possibility of how different bristles and / or tufts of bristles can be arranged in one and the same bristle field.
  • Claim 20 represents a simple and expedient embodiment of how a significantly larger number of bristle tufts and possibly also different bristles can be provided with a single slide, since different bristles can be kept ready in each of the bristle magazines mentioned therein.
  • Claim 21 relates to the possibility of further accelerating and rationalizing the production and thereby increasing the possibility of combining different bristles and shapes of bristle tufts.
  • Claim 23 is an embodiment of the entire device in such a way that the individual work steps such as filling the mold, the subsequent melting and connecting to a brush body can each be carried out approximately simultaneously.
  • An essential embodiment of the device contains claim 25, wherein the holding and insertion plate mentioned therein, which has already been mentioned above, is initially part of the device, but later forms part of the brush produced.
  • a new holding plate of this type is to be supplied, for which purpose a work station for placing such holding plates on the molds can be provided on the chain belt according to claim 23 in front of the station for filling the molds.
  • this holding plate In addition to improving the insertion of the bristles and the better holding together of the bristle tufts, especially after the fusing and, if necessary, when the fused bristle ends are encapsulated, this holding plate has the additional advantage that it provides the brush manufacturer with further design options, e.g. offers that this plate and the actual brush body can be colored differently. If the perforations of the holding plate are slightly conical, so-called open bristle bundles result, in which the individual bristles are not pressed together by an anchor and are therefore separate from one another and can therefore achieve better cleaning results.
  • a major advantage of filling the mold with the aid of negative pressure is that any grinding dust still stuck to the bristle ends due to their rounding is practically completely removed, whereas in the conventional stamping process this grinding dust has scarcely been removed could be and every new toothbrush adheres a considerable amount of such grinding dust.
  • these bristle tufts fused into bristle bundles can advantageously be used to produce brushes, the manufacture of the individual bristle bundles advantageously having a high level Working speed and precision and at the same time good strength of the bristle bundle can take place.
  • bristle fields are to be formed from coherent tufts of bristles with a retaining plate connecting and stabilizing them, however, it is expedient if the perforations in the retaining plate on the upper side facing away from the working ends of the bristles have depressions which accommodate the fused ends of the bristles of the individual bristle tufts and which merge into one another at the mutually facing edges below the plate surface.
  • the bristles to be fused protrude bumps, protrusions, knobs or the like can form between the perforations project meltable material.
  • the protruding bristles can then be fused with these if a corresponding melting punch is pressed sufficiently far down until it touches these projections, knobs or the like and the bristle ends, melts and compresses them at the same time.
  • the melt which is formed by the bristle ends and these projections of the plate, can then flow into one another and, as it were, bring about welding, especially if the bristles and the plate are made of the same material. But even with different materials, there is an intimate connection between the bristles and the plate.
  • the holding plate can have a flange or a sealing lip which, after being inserted into a recess of the brush body which receives the holding plate, engages over the edge thereof. This prevents, for example, that cleaning agents gradually penetrate into the recess in the holding plate and deteriorate the appearance of the brush and also gradually loosen the connection.
  • a device suitable for solving the problem of the type mentioned is characterized, which allows a wire-free supply of the bristles to the molds and their perforations, but again advantageously negative pressure for inserting the bristles into the perforations of the Forms is used.
  • Such a device is advantageous if a separating slide for the tufts of bristles can be moved directly up to the inlet openings of the mold or the holding plate lying thereon.
  • the claims 32 and 33 relate to the rotatable removal slide, which allows a considerable acceleration of the workflow and the bristle supply, because it can be moved and rotated continuously in the same direction, i.e. the time for an idle stroke, in the case of a displaceable removal slide for its return movement the bristle magazine or magazines is necessary, is saved.
  • a device designated as a whole by 1 and recognizable above all in FIGS. 1, 4, 14 and 15 is used to produce bristle fields 2 (see, for example, FIGS. 8, 9 and 10) or bristles 3 (see again FIG. 9) and 10).
  • the ends of individual plastic bristles 4 of a tuft of bristles 5 according to FIG. 5 or 6 are fused to one another and / or to those of a neighboring tuft.
  • the device 1 includes a shape 7 provided with perforations 6, which is a semi-shape, i.e. the perforations are 6 blind holes.
  • a tuft of bristles 5 fits into these perforations 6, but the ends 8 of the bristles 4 to be fused, as shown in FIG. 1, protrude.
  • 1, 4 u. 14 has the form 7 belonging to the device 1 a connection or connecting piece 9 for applying a negative pressure to the individual perforations 6 and supply lines 10, hereinafter also simply referred to as lines 10, are provided, with a line 10 for each hole 6 to be filled leads.
  • the cross sections of these lines 10 correspond at least to those of the bristle tufts 5 to be transported and guided in them, so that each line 10 can transport a tuft of bristles 5.
  • the orifices 11 of the lines 10 and the form 7 can be moved relative to one another, as is indicated in FIGS. 1 and 14 by the double arrow Pf 1 for the orifices 11 and in FIG. 4 by the arrow Pf 2 for the form 7.
  • the guide lines 10 are at a distance from one another or, if necessary, can be set to a distance at which the tufts of bristles 5 are provided before they are inserted into the mold 7 according to FIGS. 1 and 2.
  • Fig. 1 it is shown that the insertion ends 12 are formed or held together by an insertion plate 13.
  • the outlets or outlets 11 of the lines 10 are provided or adjustable according to FIG. 1 in the position of use in the distance and the arrangement which corresponds to the hole arrangement of the shape 7 which can be recognized by way of example in FIG. 3 or a holding plate 14 which can be placed on the shape according to FIG. 1 .
  • the bristles can be sucked in at the inlets 12 after applying a negative pressure to the connection 9, transported through the lines 10 and drawn into the perforations 6 of the mold 7, in which case, of course, the mouths 11 of the line 10 onto the mold 7 or Holding plate 14 are lowered or the shape 7 is raised.
  • the device also includes at least one bristle magazine 15, in the exemplary embodiment two such bristle magazines 15 are provided with mutually facing removal points 16, which are under pressure from opposite sides according to arrows Pf 3, so that the bristles 4 in them are repeatedly brought to the removal points 16 and pressed. As a result, the bristles 4 are pressed against a removal slide 17, which in each case limits the supply of bristles at these removal points 16.
  • This across the tapping point 16 movable removal slide 17 has, according to FIG. 2, at a distance from each other, facing the bristle supply and towards the edge open recesses or recesses 18 for forming the bristle tufts 5.
  • This removal slide 17 is with its area having these recesses 18 from the bristle magazine 15 to below the insertion openings 12 of the lines 10 are displaceable, the drawings showing this displacement position.
  • Hoses and / or pipes can be provided as lines 10, the lines 10 being flexible in particular in the area of the insertion end 12 and / or the mouth 11 for carrying out the adjustment movement of these areas.
  • the insertion ends 12 of the lines 10 are connected to an insertion head, in the exemplary embodiment of the insertion plate 13 already mentioned, or fastened to such an insertion head.
  • the insertion openings 19 in the exemplary embodiment are funnel-shaped with a course tapering from a larger cross section to the line cross section, so that all the individual bristles 4 of a respective bristle tuft 5 can be sucked in and transported in tufts with a correspondingly high degree of security.
  • outlets or orifices 11 of the lines 10 are also connected to one another and are thereby fixed to an orifice plate 20. If the assignment of the individual orifices 11 to change a bristle pattern is to be changed, the orifice plate 20 can possibly be exchanged.
  • the perforations 6 for receiving the tufts of bristles 5 in the shape 7 are blind holes, the bottoms 21 or inner end faces of which have a negative shape or contour for forming the have free ends of the respective bristle tufts 5 and, for example, as Hollow cone or tip, hollow hemisphere (Fig. 6), bevel, plane (middle bristle tufts of Fig. 5) or a combination of these hollow shapes can be formed.
  • the free working ends of these bristle tufts are simultaneously brought into a desired shape without the need for subsequent trimming or shaping of these working ends of the bristle tufts 5, so that the individual bristles can be rounded off beforehand.
  • suction channels can branch off laterally, possibly at right angles, above their bottoms, and these channels can lead to the suction connection 9 or be combined.
  • the individual bristles 4 of a bristle tuft 5 can expediently have, for example, two different lengths in order to achieve a better cleaning effect.
  • This can be achieved in a manner not shown in the drawings in that the bottoms 21 of the perforations 6 of the shape 7 are corrugated or profiled or roughened, individual bristles 4 each fitting between the elevations formed and others on these elevations, so that the Individual bristles 4 of a tuft of bristles 5 at its free working end receive the slightly different lengths, which can be seen particularly clearly in FIG. 12.
  • the bottoms 21 of the individual perforations 6 can be formed from the end face of stamps which can be displaced in the perforations 6 and which are arranged deeper when filling than when the bristles 4 are fused and in one of the exact tuft lengths appropriate height, if necessary, can be raised via the suction channels leading from the perforations 6.
  • the desired final length of the individual bristles and tufts of bristles is achieved with great certainty even if, for example, when a tuft of bristles is sucked in, one or the other bristle within the perforation 6 remains somewhat behind the other, which above all cannot be completely ruled out if the suction channels branch off laterally from the perforations.
  • the slider 17 for separating the bristle tufts 5 when removing the bristles 4 from the bristle magazine 15 can have different recesses or recesses 18 for forming different bristle tufts 5 and in particular for forming bristle tufts 5 of different thickness and / or cross-sectional shape .
  • Fig. 3 it can be seen that bristle fields and bristle patterns are conceivable, in which on the one hand round, on the other hand square and also elongated cross sections of bristle tufts 5 are provided, the cross-sectional sizes also being able to be different. This can be taken into account by corresponding cross-sectional areas on the recesses 18. The shaping of the cross-sectional contour of the individual Tufts of bristles can then take place in the form 7 and / or the holding plate 14.
  • the bristle fields 2 and / or the brushes 3 can also be combined with bristles of different thickness, quality, flexibility and / or color.
  • the assignment ratio of such different bristle tufts to one another can also be preselected by different numbers of recesses 18 on the removal slide 17.
  • bristle magazines 15 or pairs of such magazines 15 and associated removal slides 17 can also be provided for the inlet heads 13 of the suction guides 10 in order to allow an even higher production rate and possibly the loading of even more molds 7 at the same time.
  • the feed lines 10 for the bristle tufts 5 from the slide 17 to the molds 7 are about 1 mm - 10 mm in diameter, e.g. can have approximately 2 mm or 5 mm inner diameter, depending on how thick the individual bristle tufts 5 are.
  • the length of the feed lines 10 can be approximately 1 m - 10 m, for example approximately 5 m, as tests have shown without individual bristles being sucked in remaining in the line 10. An optimal assignment of the bristle magazines 15 to the molds 7 can thus be selected for the production process.
  • FIG. 4 A further expedient embodiment of the device 1 can be seen in FIG. 4.
  • the molds 7 are arranged on a conveyor or chain belt 24 or the like.
  • a heating or melting station 25 for fusing the bristle ends and optionally again in the feed direction a feed device for brush bodies 26 and / or an ultrasonic welding system 27 or adhesive device are arranged are.
  • the ejection station 28 for the finished brushes 3 can be seen on the lower run of the belt 24.
  • a holding and insertion plate 14 for the bristles 4 is arranged, which has through holes 6a in the arrangement in which the bristle tufts 5 form one Bristle field are summarized and from which the bristles 4 inserted into the mold protrude with their ends 8 when fused.
  • This holding plate 14, which can be placed on the mold 7, can consist of the material from which the brush body 26 is also made, so that the welding or gluing to the brush body 26, which is still pending in FIG. 8 and has already been carried out in FIG. 10, easier and more permanent is possible.
  • a work station 29 is arranged in front of the station for filling the bristles 4 into the mold 7, in which the holding plates 14 are fed and placed on the mold 7.
  • this holding plate 14 may have a suitably circumferential sealing flange 30 which covers the joint between the plate 14 and the depression 31 of the brush body 26 after connection and so the life of the brush especially when used further extended as a toothbrush because penetration of cleaning agents and the like. The like is prevented even more effectively in this area.
  • the perforations 6a in the holding plate 14 have depressions 6b on the upper side facing away from the working ends of the bristles 4, that is to say they widen towards this upper side.
  • the fused ends 8 of the bristles 4 of the individual tufts of bristles are located in these extensions or depressions 6b of the perforations 6a, whereby it is also indicated in FIG. 6 that these depressions 6b below the plate surface with the mutually facing edges 7 can merge, so that the fused bristle ends according to FIG. 7 can also be partially connected to those of the neighboring tufts and fused.
  • the still soft or pasty melt is placed under the negative pressure which also serves to convey the bristles 4 into the mold 7, this melt can partially be located in the holding plate 14 between the bristles sucked and thus the strength of the anchor can be further improved.
  • the gaps that can be seen in FIG. 7 between the fused regions can also be filled with melted and solidified plastic compound.
  • the holding plate 14 can also be the brush body itself, into which the bristle tufts 5 are inserted and on which they are fused, it then being expedient to close off the side provided with this fusing with a cover plate 32, in particular then, if only the bristles 4 of the bristle tufts 5 are fused to one another and not to the neighboring tufts, as shown in FIG. 5.
  • brushes 3 or bristle fields 2 can be produced, bristle bundles or tufts 5 being filled into the perforations 6 of the molds 7 and then at the ends 8 facing away from the later free working ends of the plastic bristles 4 in the in FIG. 5 or 6 can be fused in a recognizable manner, FIG. 5 showing a merger only on the individual tufts 5, FIGS. 6 and 7 but also merging with the neighboring tufts.
  • the procedure is such that the bristle tufts 5 are first formed from individual bristles 4 by separating a supply of bristles into tufts 5, that the bristles 4 are then sucked in tufts, fed to the mold 7 and sucked into the perforations 6 of the mold 7 and then melted .
  • the feeding and filling into the mold can take place in one work station, the subsequent melting in a neighboring work station, so that during the melting of the bristles, a filling process can already be carried out for a next mold 7.
  • the tufts of bristles 5 are sucked through the holding plate 14 placed on the mold 7 and equipped with matching perforations 6a, the ends 8 of the bristles 4 to be fused projecting beyond the plate 14 or at least into one towards the top of the plate 14 protruding perforated area 6b (Fig. 6) protrude, and that subsequently Bristles 4 are melted together and optionally with those of the neighboring tufts of bristles and also with knobs 33 of the holding plate 14.
  • the holding plate 14 can be connected, in particular welded or glued, to a brush body 26, which in turn can take place in a further work station after a feed movement, while at the previous work stations the previous method steps in parallel at the same time subsequent form can be performed.
  • the bristle field is ejected from the mold 7 after being connected to the holding plate 14 by fusing the bristles or with the brush body 26.
  • tufts of bristles 5 are formed from individual bristles 4 and then filled in tufts 6 in holes 6 of half-molds 7 and then fused to the holding ends 8. This takes place expediently in that the bristles 4 are removed from a bristle magazine 15 with a corresponding bristle supply and are thereby separated into bristle tufts 5, then these bristles 4 are drawn in tufts by individual lines 10 assigned to them and fed to the mold 7 and are sucked into the perforations 6 of the molds 7.
  • the device 1 shown in FIG. 14 corresponds in essential parts to the device according to FIG. 1 and therefore has the same reference numbers for most parts such as the mold 7 and the lines 10.
  • the separation of the bristle tufts 5 also takes place in the manner already described.
  • the individual tufts of bristles 5 are fed to the mold or molds 7 with the aid of an air flow which arises when a vacuum is applied to the mold 7.
  • the orifices 11 of the lines 10 have tapering or narrowing 34 with subsequent enlargement 35, that is to say in the orifices 11 a type of Venturi nozzle is arranged, within which the air flow is accelerated due to this narrowing of the cross section.
  • the bristle tufts 5 may be drawn out somewhat in length during their transport through the lines 10, because initially medium bristles can be conveyed somewhat faster than the bristles lying against the line walls. This can be exploited by an increased insertion speed with the help of the mentioned constriction 34 into the perforations 6a of the holding plate 14 and 6 of the mold 7, this increased insertion speed also increasing the momentum or the kinetic energy of the individual bristles 4, so that even the last bristles can still be inserted between the bristles already in the perforations 6 and to a certain extent "shot".
  • Such an expedient configuration of the bristle supply is possible precisely because of the conveyance with the aid of negative pressure, whereas conveyance by means of compressed air at the inlet into the nozzles could lead to considerable traffic jams caused by bristles which might be transverse.
  • a supply device, generally designated 37, for grasping and transporting the bristle tufts 5 to the perforations 6 of the mold 7 is provided, which has a slide holding the bristle tufts 5 individually - in this case, also in the case of the preceding devices described removal slide 17 - and has a feed plate 38 provided with passages.
  • the bristle tufts 5 can be displaced transversely to their orientation direction on this feed plate 38 by means of the slide 17.
  • the feed plate 38 has passages 39 which are arranged in alignment with the perforations 6 of the mold 7 or can be brought into alignment with the bristle tufts prior to separation and feeding.
  • the bristle tufts 5 can thus not only be formed and isolated in an advantageous manner with the aid of the removal slide 17, but can also be supplied practically directly to the mold 7.
  • the mold 7 also has a vacuum connection 9 below a porous insert 22 containing the ends of the perforations 6, so that an air flow can also be generated in this case by applying a vacuum the introduction of the bristles 4 into the perforations 6 of the mold 7 brings about or at least supports them, since in the arrangement shown - as in the exemplary embodiments described above - gravity is additionally effective.
  • the device according to FIGS. 1, 4 and 14 can bridge a large distance between the bristle supply and the mold, the device according to FIG. 15 allows a construction with a small space requirement.
  • the bristle tufts 5 can contain a different number of individual bristles 4 and that in extreme cases only a single bristle 4 can be provided and can be conveyed into the mold and through a holding plate 14 in the manner described above. It is precisely here that the constriction 34 according to FIG. 14 be expedient in order to accelerate such a few or a single bristle 4, but also - as in the exemplary embodiment according to FIG. 14 itself - to be inserted centrally into the respective perforation 6.
  • FIG. 16 shows an embodiment modified with respect to FIG. 2 with respect to the removal slide 17, but the same parts have the same reference numbers even when the external design is changed.
  • the removal slide 17 is rotatable, ie it can be rotated in a constant direction of rotation Pf4 when the bristles 4 are removed from the bristle magazine (s) 15 and conveyed to the insertion openings 12 or the passages 39 and from there to the respective bristle magazine and thus only rotate in one direction.
  • the idle stroke required in the reciprocable slide 17 according to FIG. 2 by means of which the slide 17 with its recesses 18 has to be moved back to the bristle magazine 15, is eliminated. Because of this continuous direction of movement and working method as well as the avoidance of loss of time due to such an idle stroke, the loading with bristles and thus the entire work process can be accelerated considerably.
  • a stop position for the transfer of the bristles 4 can be provided at 90 °.
  • the turntable serving as removal slide 17 is acted upon by two bristle magazines 15 lying opposite one another, but has recesses 18 for the bristles 4 which are open at four points, so that such recesses 18 always exist in the area of the bristle magazines 15 and on the other hand are arranged in the area of the transfer to the molds.
  • the open edges 18 are kept closed over part of the rotational path by lateral guides 18a in order to fix the bristles.
  • the rotatable removal slide 17 is a turntable with a circular circumference and a central axis of rotation and the recesses 18 are arranged open on the periphery of this turntable.
  • two, but possibly also e.g. four or with a correspondingly large circumference of the turntable even more bristle magazines 15 can be arranged at a distance from one another along the circumference of the turntable, only enough space between the bristle magazines 15 for the holding position and the transfer point to the insertion openings 12 or passages 39, each of which Form 7, must be present.
  • the open-edged recesses 18 can have different contours and cross sections in order to form different tufts of bristles.
EP90110871A 1989-06-24 1990-06-08 Verfahren und Vorrichtung zum Herstellen von Borstenfeldern oder Borstenbündeln Expired - Lifetime EP0405204B1 (de)

Applications Claiming Priority (4)

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DE19893920769 DE3920769A1 (de) 1989-06-24 1989-06-24 Verfahren und vorrichtung zum herstellen von borstenfeldern oder borstenbuendeln
DE3920770 1989-06-24
DE3920769 1989-06-24
DE3920770 1989-06-24

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EP0405204A2 EP0405204A2 (de) 1991-01-02
EP0405204A3 EP0405204A3 (en) 1991-08-07
EP0405204B1 true EP0405204B1 (de) 1994-09-07

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US (1) US5033797A (ja)
EP (1) EP0405204B1 (ja)
JP (1) JP2774185B2 (ja)
AT (1) ATE110942T1 (ja)
AU (1) AU624048B2 (ja)
CA (1) CA2019662C (ja)
DE (1) DE59007034D1 (ja)
ES (1) ES2060869T3 (ja)

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DE19818553C1 (de) * 1998-04-24 1999-08-05 Rueb F A Holding Gmbh Verfahren zur Herstellung einer Zahnbürste aus Kunststoff
EP0972464A1 (en) 1998-07-14 2000-01-19 Firma G.B. BOUCHERIE, naamloze vennootschap Method for manufacturing brushes and brush manufacturing machine applying this method
DE4409395C2 (de) * 1994-03-18 2000-10-26 Lingner & Fischer Gmbh Zahnbürstenkopf
DE19932377A1 (de) * 1999-07-13 2001-02-08 Coronet Werke Gmbh Verfahren und Vorrichtung zur Herstellung von Bürsten sowie danach hergestellteBürsten
EP1110479A1 (de) 1999-12-22 2001-06-27 G.B. Boucherie, N.V. Verfahren zum Befestigen von Borstenbüscheln für Bürsten an Trägern aus thermoplastischem Kunststoff
EP1136017A1 (de) 2000-03-21 2001-09-26 G.B. Boucherie, N.V. Verfahren und Vorrichtung zum Verschmelzen von Faserenden
EP1136016A1 (de) 2000-03-21 2001-09-26 G.B. Boucherie, N.V. Verfahren und Vorrichtung zum Verschmelzen von Faserenden
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DE102008061389A1 (de) 2008-12-10 2010-06-24 Frisetta Kunststoff Gmbh Verfahren zum Herstellen von Borstenfeldern mittels Formen
WO2010105745A1 (de) 2009-03-20 2010-09-23 Zahoransky Ag Verfahren und vorrichtung zum herstellen von borstenfeldern für bürsten
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DE102010055686A1 (de) 2010-12-22 2012-06-28 Zahoransky Ag Vorrichtung zum Herstellen von Borstenfeldern für Bürsten
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DE4409395C2 (de) * 1994-03-18 2000-10-26 Lingner & Fischer Gmbh Zahnbürstenkopf
US5927819A (en) * 1997-02-28 1999-07-27 Gillette Canada Inc. Method and device for trimming and end-rounding bristles
DE19738256A1 (de) * 1997-09-02 1999-03-11 Rueb F A Holding Gmbh Verfahren und Vorrichtung zum Herstellen von Borstenfeldern sowie damit hergestelltes Borstenfeld
DE19738256C2 (de) * 1997-09-02 1999-09-23 Rueb F A Holding Gmbh Verfahren und Vorrichtung zum Herstellen von Borstenfeldern sowie damit hergestelltes Borstenfeld
DE19818553C1 (de) * 1998-04-24 1999-08-05 Rueb F A Holding Gmbh Verfahren zur Herstellung einer Zahnbürste aus Kunststoff
EP0972464A1 (en) 1998-07-14 2000-01-19 Firma G.B. BOUCHERIE, naamloze vennootschap Method for manufacturing brushes and brush manufacturing machine applying this method
DE19932377A1 (de) * 1999-07-13 2001-02-08 Coronet Werke Gmbh Verfahren und Vorrichtung zur Herstellung von Bürsten sowie danach hergestellteBürsten
EP1110479A1 (de) 1999-12-22 2001-06-27 G.B. Boucherie, N.V. Verfahren zum Befestigen von Borstenbüscheln für Bürsten an Trägern aus thermoplastischem Kunststoff
DE10062398C5 (de) * 2000-01-19 2016-03-03 M + C Schiffer Gmbh Verfahren zur Bildung eines Borstenbündels sowie eine zur Durchführung des Verfahrens geeignete Vorrichtung
EP1136017A1 (de) 2000-03-21 2001-09-26 G.B. Boucherie, N.V. Verfahren und Vorrichtung zum Verschmelzen von Faserenden
EP1136016A1 (de) 2000-03-21 2001-09-26 G.B. Boucherie, N.V. Verfahren und Vorrichtung zum Verschmelzen von Faserenden
EP1661487B2 (de) † 2001-12-28 2022-03-30 Trisa Holding AG Zahnbürste und Verfahren zur Herstellung einer solchen Zahnbürste
US8806695B2 (en) 2002-08-09 2014-08-19 Colgate-Palmolive Company Oral care implement having flexibly supported cleaning elements extending in opposite directions
US9167888B2 (en) 2002-08-09 2015-10-27 Colgate-Palmolive Company Oral care implement having flexibly supported cleaning elements extending in opposite directions
DE102008061384A1 (de) 2008-12-10 2010-06-24 Frisetta Kunststoff Gmbh Verfahren und Vorrichtung zum Herstellen von Bohrstenfeldern oder von Borstenbündeln
DE102008061389B4 (de) * 2008-12-10 2012-06-28 Frisetta Kunststoff Gmbh Verfahren zum Herstellen von Borstenfeldern mittels Formen
DE102008061389A1 (de) 2008-12-10 2010-06-24 Frisetta Kunststoff Gmbh Verfahren zum Herstellen von Borstenfeldern mittels Formen
EP2196107A1 (de) 2008-12-10 2010-06-16 Frisetta Kunststoff GmbH Verfahren und Vorrichtung zum Herstellen von Borstenfeldern oder von Borstenbündeln
DE202010015966U1 (de) 2009-03-20 2011-04-14 Zahoransky Ag Vorrichtung zum Herstellen von Borstenfeldern für Bürsten
DE102009013723A1 (de) 2009-03-20 2010-09-23 Zahoransky Ag Verfahren und Vorrichtung zum Herstellen und Bereitstellen von Filamentbündel und Borstenfelder
WO2010105745A1 (de) 2009-03-20 2010-09-23 Zahoransky Ag Verfahren und vorrichtung zum herstellen von borstenfeldern für bürsten
DE102010015118A1 (de) 2010-04-16 2011-10-20 Zahoransky Ag Vorrichtung zum Herstellen von Borstenfeldern für Bürsten
WO2011128020A1 (de) 2010-04-16 2011-10-20 Zahoransky Ag Vorrichtung zum herstellen von borstenfeldern für bürsten
DE102010055686A1 (de) 2010-12-22 2012-06-28 Zahoransky Ag Vorrichtung zum Herstellen von Borstenfeldern für Bürsten
CN102551339A (zh) * 2010-12-22 2012-07-11 沙郎斯基股份公司 用于制造用于刷子的刷毛区的设备
CN102551339B (zh) * 2010-12-22 2014-11-19 沙郎斯基股份公司 用于制造用于刷子的刷毛区的设备

Also Published As

Publication number Publication date
AU624048B2 (en) 1992-05-28
JPH03215211A (ja) 1991-09-20
ATE110942T1 (de) 1994-09-15
AU5769090A (en) 1991-01-03
DE59007034D1 (de) 1994-10-13
EP0405204A3 (en) 1991-08-07
CA2019662A1 (en) 1990-12-24
EP0405204A2 (de) 1991-01-02
ES2060869T3 (es) 1994-12-01
JP2774185B2 (ja) 1998-07-09
CA2019662C (en) 1996-08-13
US5033797A (en) 1991-07-23

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