EP3599934B1 - Druckplatteneinheit für eine bürstenherstellungsvorrichtung sowie bürstenherstellungsvorrichtung - Google Patents

Druckplatteneinheit für eine bürstenherstellungsvorrichtung sowie bürstenherstellungsvorrichtung Download PDF

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Publication number
EP3599934B1
EP3599934B1 EP18718104.5A EP18718104A EP3599934B1 EP 3599934 B1 EP3599934 B1 EP 3599934B1 EP 18718104 A EP18718104 A EP 18718104A EP 3599934 B1 EP3599934 B1 EP 3599934B1
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EP
European Patent Office
Prior art keywords
pressure plate
bristle
bristle carrier
plate
funnel
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.)
Active
Application number
EP18718104.5A
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German (de)
English (en)
French (fr)
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EP3599934A1 (de
Inventor
Bart Gerard Boucherie
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GB Boucherie NV
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GB Boucherie NV
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Publication of EP3599934A1 publication Critical patent/EP3599934A1/de
Application granted granted Critical
Publication of EP3599934B1 publication Critical patent/EP3599934B1/de
Active legal-status Critical Current
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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
    • A46D—MANUFACTURE OF BRUSHES
    • A46D3/00—Preparing, i.e. Manufacturing brush bodies
    • A46D3/04—Machines for inserting or fixing bristles in bodies
    • 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 invention relates to a printing plate unit for a brush manufacturing device and a brush manufacturing device itself.
  • the anchorless method provides that the bristle carrier has openings through which the tufts of bristles are inserted. The rear end of the bristle tufts then protrude from the openings and are heated on the rear side of the bristle carrier. The thermoplastic material of the bristles thus melts, as a result of which the bristles merge into one another in terms of material and a thickening results, by means of which it is impossible to pull out the individual bristles forwards. This rear side is then covered, in particular overmolded.
  • the invention relates to a different, new type of anchorless fastening of bristles in the bristle carrier.
  • This new type of attachment is in the DE 10 2016 107 759 A described.
  • blind holes which represent anchoring openings, are produced in the bristle carrier during injection molding.
  • the bristle or the bristle tufts have a thickened end with which they are inserted into the associated anchoring openings.
  • at least the edge of the bristle carrier around the anchoring opening is deformed so that a circumferential bead is created which migrates into the anchoring opening and extends to the bristle or tufts of bristles and anchors them.
  • the bristles Due to the thickened fastening end, the bristles can no longer be pulled out.
  • the special feature of this process is that the front of the bristle carrier is only brought to a temperature below the Melting temperature of the bristle material and / or the bristle carrier material is, in particular at most 85% in ° C. of the respective melting temperature of the bristle and / or the bristle carrier material.
  • the tool part exerts a compressive force on the heated bristle carrier and deforms the correspondingly heated bristle carrier.
  • the bristle carrier on the front is heated by the tool part, which is heated. If, as is the case in the preferred variant, the front side of the tool part contacts the front side of the bristle carrier for a few seconds, the temperature of the front side of the tool part also corresponds to the temperature on the front side of the bristle carrier, so that the temperatures correspond. This means that the front side of the tool part is brought to a temperature which is below the melting temperature of the bristle material and / or the bristle carrier material, in particular a maximum of 85% in ° C. of the respective melting temperature of the bristle and / or the bristle carrier material.
  • the change in distance takes place through a relative movement of the tool part to the holding part, i.e. the tool part can be moved, for this purpose the holding part stands still, or vice versa, or the tool part and the holding part both move.
  • the tool part comprises a pressure plate which is heated and which contacts the front side of the bristle carrier. Opposite the pressure plate is the holding part in the form of a counter plate.
  • a receptacle for the bristle carrier is formed between the two plates, which are movable relative to one another.
  • the pressure plate is then moved relative to the bristle carrier so that the bristles are pulled out of the passage openings.
  • the term “bristle carrier” is to be understood as that part of the finished brush which carries the bristle or the bristle tufts.
  • the bristle carrier can be the entire brush body, in the case of a toothbrush, that is, the one-piece injection-molded part consisting of the handle, neck and head, or just a prefabricated component of the later brush body.
  • the bristle carrier is usually a thin plate made of thermoplastic material, which is provided with one or more openings for filling with one or more bristles or bristle tufts.
  • the narrowed "neck" of the anchoring opening formed by the deformation near the mouth, ie the deformed edge of the anchoring opening engaging behind the thickened fastening end can, for example, have an axial extension (axial means in connection with the invention always in the direction from the front to the rear or from the back to the front) of 0.5-1.3 mm, especially 0.6-0.9 mm.
  • the thermoplastic material is preferably made from polyester, in particular polyethylene terephthalate (PET), preferably BR003, and polybutylene terephthalate (PBT), polypropylene (PP), polycarbonate (PC), polyamide (PA), polyvinyl acetate (PVA), polyethylene ( PE), acrylonitrile-butadiene-styrene copolymer (ABS) and styrene-acrylonitrile copolymer (SAN). Both homopolymers and copolymers with the thermoplastics mentioned can be used.
  • PET polyethylene terephthalate
  • PBT polypropylene
  • PC polycarbonate
  • PA polyamide
  • PVA polyvinyl acetate
  • PE polyethylene
  • ABS acrylonitrile-butadiene-styrene copolymer
  • SAN styrene-acrylonitrile copolymer
  • the predetermined temperature is preferably in a range between 30.degree. C. and 150.degree. C., particularly preferably between 60.degree. C. and 140.degree. C., in particular between 90 and 130.degree. C. or 100 and 115.degree.
  • the invention provides in particular the use of polypropylene, some groups of which have a glass transition temperature of less than 300 ° K, others have a glass transition temperature of over 300 ° K, as bristle carrier material.
  • Other preferred bristle carrier materials are PET, PBT, PA, ABS, SAN and PC. These bristle carrier materials all have glass transition temperatures of over 300 ° K.
  • the invention provides, among other things, that the melting temperature of the plastic of the bristle carrier is below the melting temperature of the bristle or Bristle lies. This also applies to brushes in which the bristle carrier material is the same as the bristle material, for example polypropylene and PA.
  • the plastics used in the present invention are, for example, copolyesters, in particular Eastar TM BR003 (with a melting temperature range of 230 to 280 ° C), polypropylenes, in particular a homopolymer such as PPH5042 with a melting temperature of 165 ° C, polycarbonate, polyamide, polyvinyl acetate or polyethylene . If these materials have a glass transition temperature above the ambient temperature, here 300 ° K, energy should be introduced into the bristle carrier via the tool part. This is also advantageous in the case of materials whose glass transition temperature is below the ambient temperature.
  • bristle carrier materials are heated to the following temperatures in the method according to the invention and by the device according to the invention explained below: Bristle carrier material Melting temperature [° C] Glass transition temperature [° C] Process temperature [° C] Polypropylene 160 ° -170 ° -10 ° - 0 ° ⁇ 136 ° PET 260 ° 70 ° ⁇ 120 ° PBT 220 ° 47 ° ⁇ 95 ° PA 200 ° - 260 ° 50 - 60 ° ⁇ 98 ° SECTION 220 ° - 250 ° 95 ° ⁇ 150 ° Pc 220 ° - 230 ° 148 ° ⁇ 210 ° SAN 200 ° 108 ° ⁇ 165 °
  • the invention provides for the front side of the bristle carrier to be heated in a range of 75-95 ° C., in particular 80-90 ° C., and in PP from 115 to 125 ° C., in particular 110-120 ° C., particularly in the case of PET.
  • melt flow index 6-35, preferably 10-15, is used.
  • the object of the invention is to create a pressure plate unit for a brush production device and a brush production device with such a pressure plate unit which ensures an even better quality of the bristles.
  • the pressure plate unit according to the invention for a brush manufacturing device for the thermal pressing of at least one bristle in an anchoring opening of a bristle carrier, wherein the brush manufacturing device has a receptacle for the bristle carrier between the pressure plate unit and a counterplate and the pressure plate unit and the counterplate can be moved towards and away from one another a heatable pressure plate with a front side opposite the counterplate and an opposite rear side and at least one receiving opening for the at least one bristle and a funnel plate provided on the rear side of the pressure plate which has an insertion opening for the at least one bristle aligned with the at least one receiving opening and with the pressure plate and the funnel plate a device for reducing the temperature of the funnel plate is provided.
  • the bristles are thermally protected away from their thickened fastening end in that the channel in which they are received during the application of pressure and temperature to the bristle carrier is kept cool. There is therefore no thermal impairment.
  • the pressure plate is preferably equipped with an electrical heating device, in particular it has recesses for receiving electrical heating cartridges.
  • the device for reducing the temperature can have insulation and / or active cooling in order not to allow the heat to be transferred from the pressure plate, or only to a small extent, to the funnel plate.
  • Active cooling means it is cooling fluid, e.g. B. compressed air, which is pumped through a corresponding channel.
  • the insulation can be carried out by a thermal insulating layer between the pressure plate and the funnel plate, for example by a separate, prefabricated, sheet-like part.
  • a separate part can be based on a paper substrate, similar to seals in internal combustion engines.
  • the corresponding part is only a few tenths of a millimeter thick, for example 0.3-0.4 mm.
  • Another additional possibility for insulation is that an air gap is provided between the pressure plate and the funnel plate.
  • This air gap can be formed by a spacer between the pressure plate and the funnel plate, which is realized by a separate part.
  • the spacer is formed by the thermal insulating layer mentioned earlier.
  • Active cooling can be implemented, for example, via a cooling channel in the funnel plate through which cooling fluid flows.
  • This cooling channel can be a groove which is open on the end face of the funnel plate facing the pressure plate and which is closed, for example, by the insulating layer.
  • Such an open groove is easy to manufacture.
  • the pressure plate there are preferably several passage openings for bristles of several bristle carriers, which are then processed at the same time.
  • a plurality of funnel plates, each assigned to a bristle carrier, can be provided on the rear of the pressure plate. These individual funnel plates can then be easily aligned with the passage openings in the pressure plate or can be exchanged individually.
  • a plurality of depressions, each assigned to a bristle carrier, for receiving prefabricated bristle carriers can be formed on the front side of the pressure plate. These bristle carriers are thus received in a form-fitting manner not only on the front side, but also on the transition edge to the side surface in the depression of the pressure plate, so that a high-quality surface can be ensured in this area after the reshaping.
  • the invention also relates to a brush manufacturing device for the thermal pressing of at least one bristle in an anchoring opening of a bristle carrier.
  • the brush manufacturing device according to the invention comprises the pressure plate unit according to the invention as well as a counter-plate opposite the pressure plate, which between itself and the pressure plate forms a receptacle for the bristle carrier.
  • the pressure plate unit and the counter plate can be moved towards and away from one another relative to one another.
  • the pressure plate can be heated in order to be able to heat a front side of the bristle carrier.
  • the bristle carrier Under the action of the temperature and pressure temperature, the bristle carrier is compressed between the pressure plate and the counterplate on the front side, so that the wall defining the anchoring opening is pressed inwards and narrowed at the transition to the front side in order to fasten the at least one bristle in the anchoring opening.
  • the temperature to which the pressure plate itself and the front side of the bristle carrier are brought is in the ranges mentioned above.
  • Corresponding controls are provided, as well as at least one temperature sensor on the pressure plate, which ensures that the specified temperature is maintained.
  • the pressure plate and the funnel plate have such a thickness that the free end of the at least one bristle, which is inserted into the passage opening, ends in the funnel plate during the pressing process.
  • the pressure plate unit can form a magazine which is filled in advance and which passes through several stations, for example a station in which the bristles of a bristle tuft are thermally connected to one another in order to produce the thickened fastening end. This magazine then wanders through several stations until it is in an anchoring station, in which the tufts of bristles are then pushed into the anchoring opening of the bristle carrier.
  • FIG. 1 an apparatus for producing brushes, for example toothbrushes, is shown.
  • a toothbrush has a brush head with tufts of bristles protruding on the front side, a neck and a handle. These three sections can merge in one piece, they form the so-called brush body.
  • the brush head can either be stuffed directly, or it can be made in two parts, with a plate-like bristle carrier, which after injection molding has already prefabricated blind hole-like anchoring openings, this plate-like bristle carrier then being brought together with the rest of the head, either by welding, gluing or by Encapsulation.
  • the brush head is made in one piece so that it forms the bristle carrier itself.
  • the brush head simultaneously forms the bristle carrier 10.
  • the bristle carrier 10 is also the brush body, because it includes the style, neck and head of the brush.
  • the bristle carrier 10 is a prefabricated, injection molded part.
  • Figure 2 shows that the bristle carrier 10 has numerous prefabricated anchoring openings 12 produced during injection molding on its underside, into which tufts of bristles are inserted and anchored therein. The following description can, however, be transferred and read identically to platelet-like bristle carriers 10.
  • the device shown comprises several stations, namely a placement station 14, which is in the Figures 1a and 1b is shown, a melting station 16, which is shown in Figure 1c is shown, as well as an anchoring station 18 for the tufts of bristles, which in the Figures 1e and 1f is shown. All stations can be constructed on and around an indexing table that cycles from one station to the next.
  • All stations are passed through by a magazine 20, also called a tool part, which transports tufts of bristles through the individual stations.
  • a magazine 20 is shown with receiving openings for a brush, which will be shown in more detail later, the magazines 20 are preferably so large in practice that several adjacent groups of receiving openings for several brushes are formed in the magazine 20. It there can also be several rows of groups of receiving openings for several brushes.
  • the magazine 20 is a printing plate unit as shown in Figures 7 to 9 is shown.
  • the magazine 20 can be according to Figure 1 has upper, flat front side 22.
  • the magazine 20, which is essentially plate-shaped, has a recess 200 with a bottom 202 on its flat front side 22 (see FIG Figure 7 ) to form part of a cavity for receiving the bristle carrier 10.
  • the magazine 20 passes through several stations and is then used for the production of further brushes, there is a magazine circulation mode in the device, with numerous identically designed magazines 20 being clocked one after the other through the individual stations.
  • the magazine 20 is thus a means of transport for tufts of bristles 24 through the device.
  • the magazine can be stationary, and the individual stations are clocked around the magazine, for example on a carousel.
  • Several stationary magazines can be processed at the same time, more precisely the tufts of bristles arranged in the magazines.
  • the magazine 20 has numerous receiving openings 26 which have a hole pattern which corresponds to the hole pattern of the bristle carrier 10.
  • Each bristle tuft 24 consists of several bristles, which are separated from a bristle supply and how Figure 1a shows, can be inserted into the magazine 20, for example by means of pins, as will be explained later.
  • the individual tufts of bristles 24 can be transported via pipes with compressed air or vacuum.
  • the bristles are made of a thermoplastic material, in particular PA, PBT, polyester, copolyester or polypropylene, but they can also consist of elastomers. It is also possible to use coextruded bristles, for example with a core made of PA with an elastomer coating. It is also not absolutely necessary that only tufts of bristles 24 are used and embedded in the anchoring opening, but only a singular, prefabricated bristle in the form of, for example, an elastomeric cleaning element with a thickened end in its Anchoring opening can be inserted and fixed in accordance with the method mentioned above and described below. Such cleaning elements are injected or foamed separately and are softer than the bristle carrier 10.
  • the tufts of bristles 24 have opposite ends and their rear ends 28, called fastening ends, protrude somewhat from the magazine 20, so they protrude somewhat from the front side 22. This is in Figure 1b shown.
  • the magazine 20, which is completely equipped with the tufts of bristles 24, is transported laterally into the melting station 16, as in FIG Figure 1c shown.
  • a heating device 30 which can be, for example, a plate heater or a hot air heater.
  • the rear ends 28 of the tufts of bristles 24 are heated without contact so that the individual bristles exceed their melting temperature and the bristles of a tuft flow together to form a thickened fastening end.
  • the bristles of a bristle cluster 24 are thus connected to one another in one piece.
  • the thickening 32 of a tuft of bristles 24 does not merge into adjacent thickenings of the adjacent tufts of bristles 24, but rather remains spherical or lenticular thickenings. Also, preferably no stamp is pressed against the thickened areas or the still liquid material of the melted bristle ends.
  • a plurality of bristle tufts 24 can be anchored in the same bristle carrier 10, at least one bristle tuft 24 consisting of bristles made of a different material with a different melting temperature than the bristles of at least one other bristle tuft 24.
  • the thickenings 32 can optionally be active, for example cold air flow 214 brought in by a fan (see FIG Figure 1d ) are cooled.
  • the magazine 20 transports the tufts of bristles 24 further into the subsequent anchoring station 18, where the tufts of bristles 24 are locked in the anchoring openings 12 of the bristle carrier 10 without anchoring.
  • the anchoring station 18 comprises at least one counter-plate 34 (preferably several counter-plates), which on its end face 36 opposite the front side 22 (see FIG Figure 2 ) has a recess 38 (several recesses in the case of several bristle carriers 10 to be accommodated), which is designed to be complementary to the corresponding shape of the bristle carrier 10, so that the latter rests flat with its rear side on the counterplate.
  • a receptacle for the bristle carrier 10 with bristles is formed between the counter plate 34 and the magazine 20.
  • the counter plate 34 itself has a flat end face 36, against which, however, the bristle carrier 10 protrudes somewhat, as Figure 2 shows in order to protrude into the recess 200 in the magazine 20 which is complementary to the area of the front side of the bristle carrier 10.
  • the magazine 20 can be heated, for example either by a plate heater supplied from the outside, which is moved laterally to the magazine 20 in the anchoring station 18 and which, since the magazine 20 is made of metal, can heat it up quickly.
  • a heater in particular an electrical resistance heater 39, is formed in the magazine 20, which is shown in FIG Figure 2 is shown.
  • the heating windings are indicated symbolically; they are located close to the front side 22 or, in the case of a recess 200, near the bottom 202 of the recess 200, which represents part of the front side 22.
  • prefabricated electrical heating cartridges are integrated into the magazine, as shown by the Figures 6 to 8 will be explained later.
  • Electrical connection contacts 41 for example sliding contacts on a side surface of the magazine 20, make it possible to electrically couple the magazine 20 when the magazine 20 is moved into the anchoring station 18 in order to activate the heater 39.
  • the front side 22 including the bottom 202 of the recess 200 itself represents an electrical resistance heating layer, so that the front side is heated directly here.
  • the electrical connection for the heater can be implemented very easily; it can be made permanent.
  • the heater 39 ensures that preferably the entire front side 22 that comes into contact with the bristle carrier 10 is heated, that is to say also the sections between the thickened areas 32.
  • the temperature to which the front side 22 is brought is below the melting temperature of the bristle and / or the bristle carrier material, preferably both materials. In particular, it is at most 85%, calculated in ° C, of the respective melting temperature of these materials. For example, if both materials have a melting temperature of 100.degree. C., the temperature of the finally heated magazine 20 on the front side 22 is at most 85.degree.
  • FIG. 8 shows a sectional view through the anchoring station 18 in FIG Figure 1e before the magazine 20 and the bristle carrier 10 are moved towards one another.
  • the thickening 32 has such a dimension, seen in the longitudinal direction A (also called the axial direction or feed direction), that it is smaller than the corresponding cross section of the anchoring opening 12, so that it is also inside 40 of the anchoring opening without being on the inside edge of the anchoring opening 12 called limiting wall, to abut or to contact the inside 40, can be inserted into the anchoring opening 12.
  • the magazine 20, which is permanently heated to the desired temperature during the entire operation, and / or the counter plate 34 are moved relative to one another, in the present case only the counter plate 34 with the bristle carrier 10 is moved so that the thickening 32 first enters the anchoring opening 12 arrives before the front side 22 contacts the flat front and front side 42 of the bristle carrier 10 facing it.
  • a base plate 44 (see Figure 3 ), on which all of the bristle tufts 24 rest with their front, front, free ends and which forms a support, can serve to bring the bristle tufts 24 towards one another at their front end.
  • the bristle carrier 10 is made of thermoplastic material, in particular of the plastics already mentioned above, such as polypropylene, ABS, PA, PBT, PET or PC.
  • the movement of the counter plate 34 does not remain in the position of the first contact, which is shown in FIG Figure 4 is shown, because a pressure on the bristle carrier 10 of at least 200 bar, preferably at least 400 bar, is exerted on the bristle carrier 10 via the counter plate 34 and the magazine 20. This pressure is already applied from the first contact between bristle carrier 10 and magazine 20 and remains the same over the exposure time (contact time).
  • This pressure is maintained with simultaneous heating of the bristle carrier 10 for an exposure time of at least 4 seconds, in particular at least 5 seconds and a maximum of 15 seconds, in particular a maximum of 10 seconds.
  • the device is driven in particular on a block, that is, the counter plate 34 makes contact outside the cavity formed by the recess 38 and the recess 200 with an end face 36 the section of the front side 22 outside the recess 200. In this contact area, no gap is provided in which could penetrate from the cavity made of material, rather the cavity is sealed by a ring-shaped circumferential contact area.
  • the base plate 44 is preferably removed before the start of the holding time or even before the exposure time, as shown in FIG Figures 3 and 4 is shown symbolically with the arrow Y.
  • the entire flat front side, at least where there is contact with the magazine 20 on the front side 42 of the bristle carrier 10, is heated. If the magazine 20 has a recess 200, it is sufficient and advantageous if the heater is attached only in the area of the bottom 202 of the recess 200.
  • the temperature to which the bristle carrier in the area of the front side 42 is heated during the exposure time is below the melting temperature of the bristle and / or bristle carrier material, in particular at or lower than 85% of the respective melting temperature, calculated in ° C. This corresponds to this Temperature of the aforementioned maximum operating temperature of the magazine 20 in the area of the front side 22 or of the bottom 202.
  • At least the edge 50 of the anchoring opening 12 can be heated in the area of the front side 42, which forms the area of the wall of the anchoring opening 12 which adjoins the opening to the front side 42.
  • the bristle carrier 10 With extremely high pressure, for example above 600 bar, it would be possible to heat the bristle carrier 10 in the area of the front side 42, at least in the area of the edge 50, only to a temperature which is above a limit temperature which is 60% in ° C, in particular 80% in ° C of the glass transition temperature of the bristle carrier material, if the bristle carrier material has a glass transition temperature of greater than or equal to 300 ° K.
  • this limit temperature is preferably at or slightly above the glass transition temperature.
  • the heating temperature is a maximum of 50% above the glass transition temperature in ° K.
  • Another variant provides that the heating of at least the edge 50 of the front side 42, in particular the entire contact surface of the bristle carrier 10 in the area of the front side 42, is heated to a temperature which is at least 30 ° C. above the ambient temperature, in particular before the inside 40 inside the anchoring opening 12 is heated above the ambient temperature by the magazine 20.
  • the magazine 20 has no extensions or the like with which it would protrude into the anchoring opening 12.
  • the bristle carrier 10 When pressure and temperature are applied to the bristle carrier material, the bristle carrier 10 is optionally even deformed over the entire surface in the area of the front side 42. The material wants to evade and thus migrates into the anchoring openings 12 in the area of the mouth and constricts them.
  • the entire thickness D and thus the maximum thickness of the bristle carrier 10 in the region of the opening of the anchoring opening 12 to the front side 42 can optionally be permanently reduced.
  • a type of bead or constriction is created which engages behind the thickened fastening end in the pull-out direction and thus secures the tuft of bristles 24.
  • the wall of the anchoring opening 12 is over a depth Z (see Figure 5A ) of at least 0.8 mm, starting from the bottom 208, is not deformed and / or the thickening 32 and also the bristles do not jam in this area.
  • the depth T of the anchoring opening after the manufacture of the brush is a maximum of 4 mm, in particular a maximum of 2.7 mm.
  • All anchoring openings 12 are blind holes so that the rear of the bristle carrier 10 does not have to be covered, since no parts of the tufts of bristles are visible or protrude on this side.
  • the bristle carrier 10 should not be brought close to its melting temperature, but rather far away from it and close to the glass transition temperature.
  • the heating temperature and thus also the temperature at the magazine 20 in the area of the front side 22 and the front side of the bristle carrier 10 should not be higher than 15% above the glass transition temperature of the bristle carrier material and / or the bristle material.
  • the front side 42 is heated to a temperature of 75-95 ° C., in particular 80-90 ° C., in the case of PP, to a temperature of 105-125 ° C., in particular 110-120 ° C.
  • the PP is selected so that it has a melt flow index (MFI) of 6-35, preferably 10-15, in the initial state.
  • One embodiment of the invention provides that the front side 22 and thus the bristle carrier 10 are heated to a temperature of a maximum of 140.degree. C., in particular a maximum of 130.degree. C., preferably in the range from 100 to 115.degree.
  • Polypropylene, PET, ABS, copolyester and SAN in particular are used as materials for the bristle carrier.
  • the rear side 206 of the bristle carrier 10 and the area extending from the rear side 206 to at least the bottom 208 of the anchoring openings 12 (preferably even further in the direction of the front side 42) should not be deformed.
  • the counterplate 34 can be provided with active cooling.
  • the counter-plate 34 and the magazine 20 are moved apart again so that the tufts of bristles 24 are pulled out of their receiving openings 26.
  • the device has a controller 51, via which not only the heating temperature, but also the pressure applied and the movement sequences are controlled.
  • the assembly of the magazine 20 can either, as in Figure 1a take place directly via a bristle separator, or via another variant that is included in Figure 6 is shown.
  • a cassette 60 with numerous receiving openings is first filled with tufts of bristles.
  • the isolated tufts of bristles can then also be stored via this cassette 60 until they are finally pressed directly into the magazine 20, for example via movable pins 62.
  • the pressure plate unit comprises a pressure plate 100, the front side 22 of which makes contact with the front side 42 of the bristle carrier 10 and which is heated.
  • a so-called funnel plate 102 adjoins the pressure plate 100 and is connected to it.
  • the receiving openings 26 in the pressure plate 100 are aligned with one or more insertion openings 66 in the funnel plate 102, which are optional, this is based on the Figures 7 to 9 to see, can also widen towards the back. This is optional.
  • the insertion openings 66 can, as shown on the left in FIG Figure 6 can be seen, also complement each other to an opening to the pressure plate 10, so that several tufts of bristles can be combined into a common, larger tuft of bristles and transported into the corresponding receiving opening 26.
  • a device for reducing the temperature of the funnel plate 102 is provided between the pressure plate 100 and the several funnel plates 102 here.
  • each bristle carrier 10 has its own funnel plate 102.
  • the device for reducing the temperature is embodied in the present case by insulation and also by active cooling, with only one of these two options being alternatively also conceivable.
  • the individual insulating layers 108 are only 0.3 to 0.4 mm thick and consist of a paper substrate.
  • the insulating layer 108 ensures a minimal air gap between the rear side of the pressure plate 100 and the funnel plate 102 the better positioning of the insulating layer 108 a minimal (smaller 0.3 mm), a recess adapted to the outer contour of the insulating layer 108 may be present in the funnel plate 102.
  • the insulating layer 108 is angular and ring-shaped, with a central opening in the area of the receiving openings 26 of a bristle carrier.
  • a cooling channel 110 is also provided for thermal decoupling, which is formed by a groove in the funnel plate 102 that is open to the end face 106.
  • the cooling channel 110 extends from an inlet opening 112 on one end face to an outlet opening 114 on the opposite, likewise short end face of each funnel plate 102. Between the inlet opening 112 and the outlet opening 114, the cooling duct 110 branches out to meander through the funnel plate 102 on the one hand and on the other hand around a central portion in which the insertion openings 66 are formed.
  • cool compressed air is provided as the cooling fluid.
  • a cooling air connection is coupled to the inlet openings 112 and compressed air is pushed through the cooling channels 110.
  • the cooling channels 110 are sealed off and closed off from the pressure plate 100 by the associated insulating layers 108.
  • the individual bristles in the region of their free ends are still in the insertion openings 66 of the funnel plate 102.
  • the length of the bristles measured from the thickening 32, are in the insulated part of the pressure plate unit, i.e. two thirds of the length of the bristles is away from the back of the pressure plate 100 in the direction of the funnel plate 102 or even protrudes from the funnel plate 102 still out.
  • the bristles used are in particular ⁇ 0.15 mm thick.

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EP18718104.5A 2017-03-27 2018-03-27 Druckplatteneinheit für eine bürstenherstellungsvorrichtung sowie bürstenherstellungsvorrichtung Active EP3599934B1 (de)

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BE2017/5201A BE1024474B1 (de) 2017-03-27 2017-03-27 Druckplatteneinheit für eine Bürstenherstellungsvorrichtung sowie Bürstenherstellungsvorrichtung
PCT/EP2018/000126 WO2018177594A1 (de) 2017-03-27 2018-03-27 Druckplatteneinheit für eine bürstenherstellungsvorrichtung sowie bürstenherstellungsvorrichtung

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CN111887578A (zh) * 2020-08-11 2020-11-06 天津斗源美容仪器有限公司 一种牙刷的生产加工工艺
CN112189982A (zh) * 2020-09-29 2021-01-08 斗井化妆用具(深圳)有限公司 化妆刷的制作方法
CN114347202B (zh) * 2021-12-09 2023-03-21 佳米艾家居(广东)股份有限公司 一种层压实木板及其制备工艺
EP4032432A3 (de) * 2022-05-19 2022-11-16 Zahoransky AG Verfahren zur herstellung von bürsten und bürstenherstellungsvorrichtung
EP4035565A3 (de) * 2022-05-19 2022-11-16 Zahoransky AG Profilierungsvorrichtung, bürstenherstellungsvorrichtung, verfahren zur profilierung eines borstenbesatzes und verfahren zur herstellung einer bürste
EP4035564A3 (de) * 2022-05-19 2022-11-16 Zahoransky AG Bürste, verfahren zur herstellung von bürsten und bürstenherstellungsvorrichtung

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DE4014926A1 (de) * 1990-05-10 1991-11-14 Wolfgang Bickel Verfahren zum verbinden von borsten mit einem borstentraeger
US5224763A (en) * 1991-12-30 1993-07-06 The Procter & Gamble Company Method of fastening bristle tufts to bristle carrier
DE19738256C2 (de) * 1997-09-02 1999-09-23 Rueb F A Holding Gmbh Verfahren und Vorrichtung zum Herstellen von Borstenfeldern sowie damit hergestelltes Borstenfeld
EP1136017B1 (de) * 2000-03-21 2003-06-25 G.B. Boucherie, N.V. Verfahren und Vorrichtung zum Verschmelzen von Faserenden
DE10163729A1 (de) * 2001-12-21 2003-07-10 Zahoransky Anton Gmbh & Co Verfahren und Vorrichtung zum Herstellen von Bürsten
DE102016107759A1 (de) * 2015-07-13 2017-01-19 Gb Boucherie Nv Verfahren und Vorrichtung zum Herstellen einer Bürste

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BE1024474B1 (de) 2018-04-24
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CN110662457A (zh) 2020-01-07
TW201840284A (zh) 2018-11-16
EP3599934A1 (de) 2020-02-05

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