EP4369986A1 - Procédé et dispositif de fixation de poils dans un support de poils - Google Patents

Procédé et dispositif de fixation de poils dans un support de poils

Info

Publication number
EP4369986A1
EP4369986A1 EP22744432.0A EP22744432A EP4369986A1 EP 4369986 A1 EP4369986 A1 EP 4369986A1 EP 22744432 A EP22744432 A EP 22744432A EP 4369986 A1 EP4369986 A1 EP 4369986A1
Authority
EP
European Patent Office
Prior art keywords
opening
forming tool
bristle
front side
bristle carrier
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.)
Pending
Application number
EP22744432.0A
Other languages
German (de)
English (en)
Inventor
Bart Gerard Boucherie
Chris DEPICKERE
Henk Vandenbussche
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
Publication of EP4369986A1 publication Critical patent/EP4369986A1/fr
Pending legal-status Critical Current

Links

Classifications

    • A—HUMAN NECESSITIES
    • A46—BRUSHWARE
    • A46B—BRUSHES
    • A46B3/00—Brushes characterised by the way in which the bristles are fixed or joined in or on the brush body or carrier
    • A46B3/06—Brushes characterised by the way in which the bristles are fixed or joined in or on the brush body or carrier by welding together bristles made of metal wires or plastic materials
    • A—HUMAN NECESSITIES
    • A46—BRUSHWARE
    • 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
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C65/00—Joining or sealing of preformed parts, e.g. welding of plastics materials; Apparatus therefor
    • B29C65/56—Joining or sealing of preformed parts, e.g. welding of plastics materials; Apparatus therefor using mechanical means or mechanical connections, e.g. form-fits
    • B29C65/567—Joining or sealing of preformed parts, e.g. welding of plastics materials; Apparatus therefor using mechanical means or mechanical connections, e.g. form-fits using a tamping or a swaging operation, i.e. at least partially deforming the edge or the rim of a first part to be joined to clamp a second part to be joined
    • B29C65/568—Joining or sealing of preformed parts, e.g. welding of plastics materials; Apparatus therefor using mechanical means or mechanical connections, e.g. form-fits using a tamping or a swaging operation, i.e. at least partially deforming the edge or the rim of a first part to be joined to clamp a second part to be joined using a swaging operation, i.e. totally deforming the edge or the rim of a first part to be joined to clamp a second part to be joined
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C66/00—General aspects of processes or apparatus for joining preformed parts
    • B29C66/01—General aspects dealing with the joint area or with the area to be joined
    • B29C66/02—Preparation of the material, in the area to be joined, prior to joining or welding
    • B29C66/022—Mechanical pre-treatments, e.g. reshaping
    • B29C66/0224—Mechanical pre-treatments, e.g. reshaping with removal of material
    • B29C66/02241—Cutting, e.g. by using waterjets, or sawing
    • B29C66/02242—Perforating or boring
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C66/00—General aspects of processes or apparatus for joining preformed parts
    • B29C66/50—General aspects of joining tubular articles; General aspects of joining long products, i.e. bars or profiled elements; General aspects of joining single elements to tubular articles, hollow articles or bars; General aspects of joining several hollow-preforms to form hollow or tubular articles
    • B29C66/51—Joining tubular articles, profiled elements or bars; Joining single elements to tubular articles, hollow articles or bars; Joining several hollow-preforms to form hollow or tubular articles
    • B29C66/53—Joining single elements to tubular articles, hollow articles or bars
    • B29C66/532—Joining single elements to the wall of tubular articles, hollow articles or bars
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C66/00—General aspects of processes or apparatus for joining preformed parts
    • B29C66/69—General aspects of joining filaments 
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C66/00—General aspects of processes or apparatus for joining preformed parts
    • B29C66/70—General aspects of processes or apparatus for joining preformed parts characterised by the composition, physical properties or the structure of the material of the parts to be joined; Joining with non-plastics material
    • B29C66/73—General aspects of processes or apparatus for joining preformed parts characterised by the composition, physical properties or the structure of the material of the parts to be joined; Joining with non-plastics material characterised by the intensive physical properties of the material of the parts to be joined, by the optical properties of the material of the parts to be joined, by the extensive physical properties of the parts to be joined, by the state of the material of the parts to be joined or by the material of the parts to be joined being a thermoplastic or a thermoset
    • B29C66/739—General aspects of processes or apparatus for joining preformed parts characterised by the composition, physical properties or the structure of the material of the parts to be joined; Joining with non-plastics material characterised by the intensive physical properties of the material of the parts to be joined, by the optical properties of the material of the parts to be joined, by the extensive physical properties of the parts to be joined, by the state of the material of the parts to be joined or by the material of the parts to be joined being a thermoplastic or a thermoset characterised by the material of the parts to be joined being a thermoplastic or a thermoset
    • B29C66/7392—General aspects of processes or apparatus for joining preformed parts characterised by the composition, physical properties or the structure of the material of the parts to be joined; Joining with non-plastics material characterised by the intensive physical properties of the material of the parts to be joined, by the optical properties of the material of the parts to be joined, by the extensive physical properties of the parts to be joined, by the state of the material of the parts to be joined or by the material of the parts to be joined being a thermoplastic or a thermoset characterised by the material of the parts to be joined being a thermoplastic or a thermoset characterised by the material of at least one of the parts being a thermoplastic
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C66/00—General aspects of processes or apparatus for joining preformed parts
    • B29C66/80—General aspects of machine operations or constructions and parts thereof
    • B29C66/81—General aspects of the pressing elements, i.e. the elements applying pressure on the parts to be joined in the area to be joined, e.g. the welding jaws or clamps
    • B29C66/814—General aspects of the pressing elements, i.e. the elements applying pressure on the parts to be joined in the area to be joined, e.g. the welding jaws or clamps characterised by the design of the pressing elements, e.g. of the welding jaws or clamps
    • B29C66/8141—General aspects of the pressing elements, i.e. the elements applying pressure on the parts to be joined in the area to be joined, e.g. the welding jaws or clamps characterised by the design of the pressing elements, e.g. of the welding jaws or clamps characterised by the surface geometry of the part of the pressing elements, e.g. welding jaws or clamps, coming into contact with the parts to be joined
    • B29C66/81411—General aspects of the pressing elements, i.e. the elements applying pressure on the parts to be joined in the area to be joined, e.g. the welding jaws or clamps characterised by the design of the pressing elements, e.g. of the welding jaws or clamps characterised by the surface geometry of the part of the pressing elements, e.g. welding jaws or clamps, coming into contact with the parts to be joined characterised by its cross-section, e.g. transversal or longitudinal, being non-flat
    • B29C66/81415—General aspects of the pressing elements, i.e. the elements applying pressure on the parts to be joined in the area to be joined, e.g. the welding jaws or clamps characterised by the design of the pressing elements, e.g. of the welding jaws or clamps characterised by the surface geometry of the part of the pressing elements, e.g. welding jaws or clamps, coming into contact with the parts to be joined characterised by its cross-section, e.g. transversal or longitudinal, being non-flat being bevelled
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C66/00—General aspects of processes or apparatus for joining preformed parts
    • B29C66/80—General aspects of machine operations or constructions and parts thereof
    • B29C66/81—General aspects of the pressing elements, i.e. the elements applying pressure on the parts to be joined in the area to be joined, e.g. the welding jaws or clamps
    • B29C66/814—General aspects of the pressing elements, i.e. the elements applying pressure on the parts to be joined in the area to be joined, e.g. the welding jaws or clamps characterised by the design of the pressing elements, e.g. of the welding jaws or clamps
    • B29C66/8141—General aspects of the pressing elements, i.e. the elements applying pressure on the parts to be joined in the area to be joined, e.g. the welding jaws or clamps characterised by the design of the pressing elements, e.g. of the welding jaws or clamps characterised by the surface geometry of the part of the pressing elements, e.g. welding jaws or clamps, coming into contact with the parts to be joined
    • B29C66/81411—General aspects of the pressing elements, i.e. the elements applying pressure on the parts to be joined in the area to be joined, e.g. the welding jaws or clamps characterised by the design of the pressing elements, e.g. of the welding jaws or clamps characterised by the surface geometry of the part of the pressing elements, e.g. welding jaws or clamps, coming into contact with the parts to be joined characterised by its cross-section, e.g. transversal or longitudinal, being non-flat
    • B29C66/81415—General aspects of the pressing elements, i.e. the elements applying pressure on the parts to be joined in the area to be joined, e.g. the welding jaws or clamps characterised by the design of the pressing elements, e.g. of the welding jaws or clamps characterised by the surface geometry of the part of the pressing elements, e.g. welding jaws or clamps, coming into contact with the parts to be joined characterised by its cross-section, e.g. transversal or longitudinal, being non-flat being bevelled
    • B29C66/81419—General aspects of the pressing elements, i.e. the elements applying pressure on the parts to be joined in the area to be joined, e.g. the welding jaws or clamps characterised by the design of the pressing elements, e.g. of the welding jaws or clamps characterised by the surface geometry of the part of the pressing elements, e.g. welding jaws or clamps, coming into contact with the parts to be joined characterised by its cross-section, e.g. transversal or longitudinal, being non-flat being bevelled and flat
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C66/00—General aspects of processes or apparatus for joining preformed parts
    • B29C66/80—General aspects of machine operations or constructions and parts thereof
    • B29C66/81—General aspects of the pressing elements, i.e. the elements applying pressure on the parts to be joined in the area to be joined, e.g. the welding jaws or clamps
    • B29C66/814—General aspects of the pressing elements, i.e. the elements applying pressure on the parts to be joined in the area to be joined, e.g. the welding jaws or clamps characterised by the design of the pressing elements, e.g. of the welding jaws or clamps
    • B29C66/8141—General aspects of the pressing elements, i.e. the elements applying pressure on the parts to be joined in the area to be joined, e.g. the welding jaws or clamps characterised by the design of the pressing elements, e.g. of the welding jaws or clamps characterised by the surface geometry of the part of the pressing elements, e.g. welding jaws or clamps, coming into contact with the parts to be joined
    • B29C66/81427—General aspects of the pressing elements, i.e. the elements applying pressure on the parts to be joined in the area to be joined, e.g. the welding jaws or clamps characterised by the design of the pressing elements, e.g. of the welding jaws or clamps characterised by the surface geometry of the part of the pressing elements, e.g. welding jaws or clamps, coming into contact with the parts to be joined comprising a single ridge, e.g. for making a weakening line; comprising a single tooth
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C66/00—General aspects of processes or apparatus for joining preformed parts
    • B29C66/80—General aspects of machine operations or constructions and parts thereof
    • B29C66/82—Pressure application arrangements, e.g. transmission or actuating mechanisms for joining tools or clamps
    • B29C66/822—Transmission mechanisms
    • B29C66/8225—Crank mechanisms
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C66/00—General aspects of processes or apparatus for joining preformed parts
    • B29C66/80—General aspects of machine operations or constructions and parts thereof
    • B29C66/83—General aspects of machine operations or constructions and parts thereof characterised by the movement of the joining or pressing tools
    • B29C66/832—Reciprocating joining or pressing tools
    • B29C66/8322—Joining or pressing tools reciprocating along one axis
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29L—INDEXING SCHEME ASSOCIATED WITH SUBCLASS B29C, RELATING TO PARTICULAR ARTICLES
    • B29L2031/00—Other particular articles
    • B29L2031/42—Brushes
    • B29L2031/425—Toothbrush

Definitions

  • the invention relates to a method for fastening at least one bristle without an anchor in an associated opening, designed as a blind hole, in a plastic bristle carrier as part of a future brush, and a corresponding device.
  • Such a bristle base has a front side from which the opening extends into the bristle base, the at least one bristle having a thickened attachment end.
  • the object of the present invention is to create a method and a device with which cycle times that are increased even further are possible.
  • the method according to the invention does not provide for heating of the bristle base, since this is shaped at ambient temperature. As a result, it is no longer necessary to cool the bristle head. Furthermore, it was previously assumed that the plastic can be plastically deformed by means of high pressure and a longer exposure time, but this would then require even longer cycle times than when heating and compressing the bristle carrier. Surprisingly, however, it has now been found that only the edge section of the opening in an area near the front can be selectively reshaped by a short impact impulse, which makes extremely short cycle times possible. The entire front is also not deformed, but only the area of the opening edge, ie the area adjoining the opening on the front. It is important that the wall of the entire blind hole is not deformed.
  • the brush body is made of a thermoplastic material, in particular polypropylene or PET. It has been found that recycled PET in particular is advantageously shaped by the new method and the new device because this recycled material no longer has the properties of the "new material". Because the recycled material is not heated, the product properties of the finished brush are excellent, in particular the accuracy of the formed area and the pull-out force of the bristles. According to one embodiment, the entire brush is made of the same material, e.g. As polypropylene or PET, but especially made of recycled PET. Due to this measure in connection with the lack of heating, the materials and individual parts retain their initial properties. It must therefore be sought at a heating temperature no compromise to z. B. to achieve easy formability of the bristle carrier and cause no negative properties of the thin bristles. A side effect of this is that the brush can be recycled according to type, as it is not made of a plastic mixture and no metal anchor is used.
  • the edge of the opening does not have to be a circular ring, of course, because all hole shapes (elongated, arched, L-shaped, X-shaped, etc.) can be processed by the method and the device according to the invention.
  • the method according to the invention makes it irrelevant whether the bristles are inserted into the forming tool from the front, side or rear.
  • the forming tool does not have to be a tube that is closed on the circumference, but also several, e.g. B. rod-like forming tools can partially reshape the front edge.
  • the forming tool does not necessarily have to hit the front side vertically, but can also hit it at an angle.
  • the forming tool does not necessarily have to follow a linear path, but can also follow an inclined or curved path, e.g. travel a circular path.
  • the forming tool does not have to be moved parallel to the longitudinal axis of the bristle or the tuft, but can run obliquely or at a slight angle for this purpose.
  • the impact pulse can be applied to the bristle carrier over an exposure time of less than 250 msec, in particular less than 50 msec, ie the exposure time is the contact time of the forming tool on the bristle carrier. Tests have shown that it is advantageous if the exposure time is at least 3 msec.
  • the openings are equipped with their associated at least one bristle, for example one after the other, i. H. hole by hole. This means that the impact impulse is used in a very targeted and selective manner.
  • the forming tool itself can also fill all the openings and fix the bristles in the openings through the plastic forming. This can be done in one operation: the forming tool with bristles protruding in the direction of movement pushes this bristle end or tuft end into the opening and the front side rushing behind the end then strikes the front side of the bristle carrier.
  • a forming tool which is tubular in the contact area with the bristle carrier in order to deform the edge in a closed manner all the way around.
  • a forming tool which has a plurality of rams spaced apart from one another, which deform the edge in sections.
  • the latter option sees e.g. B. punctiform deformations or ring-section-shaped deformations, wherein the deformed sections are spaced apart, similar to a broken line or a dotted line.
  • the reshaping tool can have a number of receptacles for bristles and these can be pushed into assigned openings at the same time and their edges can be plastically reshaped by the impact impulse. As an alternative to this, all openings can possibly even be filled with one tool and the edges are then reshaped with the same or another tool.
  • a forming tool which has a plurality of annular or ring-section-shaped front extensions, each extension being assigned an opening and this extension plastically deforming the front edge of the opening at least in sections.
  • the forming tool can strike the bristle carrier perpendicularly to the mouth cross-section, or the forming tool can have several spaced-apart plungers which strike the bristle carrier from the outside at an angle towards the edge and at the same time inwards. In doing so, the multiple rams push the material obliquely downwards and toward one another, i. H. into the opening in the area of its mouth.
  • a bristle carrier is used with a front side that can be flat or convexly curved.
  • the opening here runs obliquely to a tangent on the front side in the area of the opening, with the front side having a flat contact surface adjacent to the opening, which runs perpendicularly or at an angle of 70 to 90° to a central axis of the opening, the forming tool being tilted counter to the contact surface hits.
  • This option makes it possible to anchor bristles or tufts in the bristle carrier at an angle to the front without the risk of the bristle or tuft buckling or tilting during reshaping.
  • a variant of the invention provides that the forming tool has a flat front with which it strikes the bristle carrier and/or tapers conically at the front or has a conical recess on the front that forms a receptacle for the at least one bristle.
  • the forming tool receives z. B. by a drive mechanism or drive mass set in motion, in particular by a flywheel, its kinetic energy and releases it during forming.
  • a drive mechanism or drive mass set in motion in particular by a flywheel, its kinetic energy and releases it during forming.
  • the forming tool or the intermediate drive mechanism is driven by a servo motor or a cam.
  • the forming tool has a contact part which is placed on the front side and a striking part which is struck against the contact part in order to push it into the bristle base, the movable part does not strike the plastic directly.
  • the shape of the formed edge can be predetermined very well.
  • the forming tool should be hammered 0.2 - 3 mm deep into the front, allowing the plastic to spring back a bit.
  • the at least one bristle can first be inserted into the opening using a feed tool and then anchored in the brush body using the forming tool.
  • a device for manufacturing a brush and for carrying out the method according to the invention with a holder for bristle holders which rest against the rear of the holder, and a forming tool which is designed to strike against the front side of the bristle holder and to deform them.
  • e.g. B. provided a feed tool which pushes bristles into their openings, which is then not part of the forming tool.
  • the forming tool can have a contact part, which is placed on the front side, and a striking part, which is struck against the contact part in order to push it into the bristle base.
  • the orifice may have a central axis oblique to a tangent to the face, which may be planar or convex, in the region of the orifice, with the face having a planar contact surface adjacent the orifice which is at an angle of from 70° to 90° ° runs to a central axis of the opening, wherein the forming tool can strike against the contact surface.
  • the forming tool can be divided. A bristle feed from the side into the forming tool is provided for this purpose.
  • Figure 1 is a view of a bristle carrier as part of a later finished brush with a drilling tool
  • FIG. 2 the insertion and attachment of tufts of bristles into the openings of the bristle carrier according to the method according to the invention
  • FIG. 3 shows a variation of a forming tool as part of a device according to the invention
  • FIG. 4 shows an enlarged view of the forming tool when it hits the bristle carrier as part of the method according to the invention and the device according to the invention
  • FIG. 5 shows a sectional view through an enlarged bristle carrier with a tuft of bristles attached thereto
  • Figure 6 shows a variant of the device according to the invention
  • FIG. 7 shows a further variant of the forming tool as part of the device according to the invention.
  • FIG. 8 shows a perspective view of a bristle carrier with oblique openings
  • FIG. 9 shows a sectional view through the bristle carrier with the tuft of bristles pushed in according to FIG. 8,
  • FIG. 10 shows a sectional view through a variant of the forming tool that can be used in the invention
  • Figure 11 is a sectional view through a further variant of the
  • FIG. 12 an additional variant of the forming tool
  • FIG. 13 shows a forming tool with a plurality of spaced-apart rams which together form the forming tool
  • FIG. 14 is a sectional view of another variant of the flywheel drive device according to the invention
  • FIG. 15 shows another variant of the device according to the invention with a contact part and a striking part, which together form the forming tool.
  • FIG. 1 shows a bristle carrier 10 which is part of a finished brush.
  • the bristle carrier 10 consists of a thermoplastic material, in particular polypropylene or new or recycled PET, and has numerous openings 12 into which one or more bristles, i.e. also a tuft of bristles 14 (see FIG. 2), are inserted and fastened in the bristle carrier 10 without anchors can.
  • the entire brush is made of the same material, e.g. As polypropylene or PET, but especially made of recycled PET.
  • the future brush can be any type of brush, be it a household brush, a toothbrush or the like.
  • the bristle holder 10 can, for example, also be the entire brush holder or a part of the brush holder, for example a small plate later equipped with tufts of bristles, which is combined with the rest of the bristle body, for example by overmoulding, welding, gluing or the like.
  • the openings 12 in the bristle base 10 are produced either by drilling, as symbolized by the drilling tool 16 shown, or by injection molding the bristle base 10.
  • the openings 12 are in particular blind holes.
  • openings 12 are cylindrical right down to the bottom, that is, they have no undercuts or the like.
  • the opening starts from a front side 18 of the bristle carrier 10 and the mouth of the opening is surrounded on the front side 18 by an opening edge 20 which runs around the opening 12 on the front side 18 in a ring shape.
  • the opening 12 itself is defined by an inner side 22 of the wall delimiting the opening 12 .
  • the opening 12 is perpendicular to the front face 18, but it may also be oblique thereto (see Figures 8 and 9).
  • At least one bristle or tuft of bristles 14 is inserted into the respective opening 12 and fastened therein, the at least one bristle or tuft of bristles having a thickened fastening end 24 .
  • This thickened fastening end 24 is produced in that the singular bristle or the bristles of the bristle tuft are heated together and melt, so that a plug or a kind of ball of plastic material is formed which is thicker in cross-section than the singular bristle or, if a bristle tuft 14 is inserted into the bristle carrier 10 is thicker than the cross section of the tuft 14 of bristles.
  • the thickened attachment end is the common attachment end of all bristles of the bristle tuft 14 because the molten plastic of the bristle ends merges so that the bristles of a bristle tuft 14 are connected to one another.
  • the singular bristle or bristle tuft 14 is anchored in the bristle carrier 10 by a forming tool 26 (see FIG. 2), specifically without anchors. This is described below with reference to FIGS. 3 and 4 in one embodiment.
  • the forming tool 26 is tubular and has a receptacle 28 in the form of a central channel.
  • a tuft of bristles 14 with a thickened fastening end 24 is pushed into the receptacle 28 from the front (this is not to be understood as limiting) so that, as shown in FIG.
  • the forming tool 26 is struck against the front face 18, prior to contacting the front face 31 of the forming tool 26 with the front side 18 of the bristle carrier 10, the attachment end 24 protruding beyond the forming tool 26 is pushed into the opening 12.
  • attachment end 24 will preferably rest against the bottom 29 of the opening 12 , but this is also not to be understood as limiting.
  • the cross section of the opening 12 is matched to the cross section (perpendicular to the longitudinal extent of the bristle or the tuft of bristles 14) so that it is at least as large, preferably slightly larger than the cross section of the thickened attachment end 24.
  • the attachment end 24 can thus be clamped without clamping or be inserted into the opening 12 by friction.
  • the so-called exposure time starts, ie the contact time of the forming tool with the bristle carrier.
  • This contact which lasts only a maximum of 250 ms, in particular less than 50 ms, leads to a plastic deformation of the section of the edge 20 close to the front side 18 over a depth s of a maximum of 70% of the total depth of the later formed opening 12.
  • the cross section of the opening ie the opening area of the opening 12 towards the front side 18 in cross section to form a constriction 36 (see FIG. 4) is narrowed in such a way that the tuft of bristles 14 can no longer be pulled out.
  • the contact time should be at least 3 msec.
  • the thickened end 24 can be pressed slightly against the bottom of the opening.
  • the lower area of the opening i. H. the bottom end portion 40, remains undeformed, i. H. here no permanent force is applied to the thickened end 24 by the impact.
  • the tuft of bristles 14 can be clamped in the area of the constriction.
  • the thickened fastening end 24 does not protrude outwards in relation to the front side 18, but on the contrary, it lies below the front side 18 at a certain distance from the front side 18 which is deformed at the edges.
  • the front side 31 can be flat.
  • the cross section of the receptacle 28 can be slightly larger than the cross section of the bristle tuft 14 or also slightly smaller, in which case either the bristle tuft 14 is inserted into the receptacle 28 via a funnel-shaped insertion aid or the receptacle 28 has a funnel-shaped widening in the area of the front side 31 to make it easier to push in the tuft of bristles 14.
  • the forming tool 26 is slotted lengthwise, similar to a clamping jaw of a drill chuck (see Figure 3) or consists of several (e.g. bowl-shaped) rams 50 (see Figure 13), with the ram 50 not having the same shape here in the other variants, it is pushed perpendicularly to the front, but at an angle to it and slightly towards each other.
  • the deformed areas are then sections of a ring which are circumferentially spaced from one another.
  • the tufts of bristles 14 or the individual bristle can be pushed laterally into the slot 52 or the gap between the rams 50.
  • the bristle tuft 14 can also be transported into the receptacle 28 from the rear.
  • the bristle carrier 10 is firmly held in a holder 32 of the corresponding device, see Figure 14.
  • a feed tool 60 can also be provided for all of the embodiments, with which the single bristle or multiple single bristles or bristle tuft 14 or multiple bristle tufts 14 are first transported to the bristle carrier 10 and into the associated openings 12 are moved in. Only then are one or more forming tools 26 moved towards them, which then strike the opening edge 20 on the front side for plastic forming of the bristle base in the area of the opening edge(s) 20.
  • FIG. 5 shows a depression 38 in the finished formed bristle base 10, which in the region of the opening edge 20, where the forming tool 26 penetrates into the bristle base 10, is illuminated. As already mentioned, this deepening can completely ring-shaped or form only sections of the opening edge.
  • each of the openings 12 is filled in succession with the forming tool 26 and its opening edge is formed, so that one opening is filled after the other. This is easily possible due to the very short cycle time.
  • the forming tool as shown in FIG. 7, to have receptacles for a plurality of bristle tufts 14 or even for all bristle tufts (or individual bristles) of a bristle carrier.
  • the shaping tool does not strike the entire front side of the bristle carrier, but really only in the area of the edge around the opening.
  • the forming tool has a plurality of front-side extensions 70 in the form of rings or ring sections, which surround the respective receiving opening in the forming tool 26 .
  • Each of these extensions 70 is then associated with an opening in the bristle carrier, and this extension 70 then plastically reshapes the front edge of the opening at least in sections.
  • the shape of the forming tool 26 in the area of its front side 31 can be different.
  • the front face 31 is planar as shown in FIG.
  • the front end of the forming tool 26 has a cone 71 tapering towards the front, which is intended to facilitate penetration into the plastic.
  • FIG. 10 shows this variant and also shows that the front side 31 runs around as a closed ring.
  • the forming tool 26 is not flat at its front end, but has a rounded portion 74 .
  • FIG. 6 shows another option of the present invention, here a tuft of bristles 14 is always removed from a bristle magazine 42 via a rotating separating device 44 .
  • the attachment end is then melted by a symbolically represented heating device 46 to form the thickening.
  • the bristle tuft 14 is then removed from the separating device 44 and transported into the forming tool 26 by means of a bristle feeder 100 .
  • the forming tool 26 takes the bristle tuft 14 from the separating device 44.
  • Devices and mechanisms for effecting such hole-to-hole movements are of similar or identical design to those in well-known brush drilling and tufting machines.
  • the device according to the invention can also be driven by a flywheel (here a flywheel 76) according to FIG.
  • the flywheel 76 can be driven by a servo motor or a rotating cam.
  • the forming tool is directly or intermediate drive mechanism driven by the servo motor or the rotating cam.
  • the forming tool 26 pushes further down along the bristle tuft 14 against the bristle carrier 10.
  • the forming tool 26 preferably penetrates only 0.2 to 3 mm deep into the front side 18 of the bristle carrier 10 .
  • the forming tool While in the previous embodiments the forming tool is moved completely and hits against the front side 18, in the embodiment according to FIG. 15 the forming tool is designed in several parts. It comprises a so-called contact part 80, which is placed on the front side 18 before the impact impulse and may have one or more of the aforementioned extensions 70 if it is designed to have a larger surface area. Alternatively, the contact part 80 is relatively a tube with a cross section adapted to the edge of the opening.
  • the forming tool then also includes an impact part 82, which strikes the contact part 80, which is already in contact with the bristle carrier, with a high impulse, allowing it to penetrate the plastic so that it is plastically deformed. In this variant, it is easier to adapt to the shape and position of the openings 12 by using different contact parts 80 .
  • the bristle tuft 14 was always inserted perpendicularly to the front side
  • the bristle tufts 14 are installed at an angle to the front side 18 .
  • the front side 18 can be flat or curved convexly or concavely. What is important in this variant is that the front side has a stepped indentation towards the opening 12 . That is, a flat, recessed contact surface 90 adjoins the actual opening 12, which is perpendicular or at least at an angle of 70-90 ° to the central axis A of the opening 12. Due to this special indentation toward the opening 12, the bristle tufts 14 are not realigned or kinked during reshaping. The forming tool then hits the contact surface that forms the edge of the opening.
  • the opening 12 runs obliquely to the corresponding tangent on the front side in the area of the opening 12.
  • the tangent in the case of a flat front side 18 naturally lies in the corresponding plane.

Landscapes

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

Abstract

Procédé de fixation sans ancrage d'au moins un poil dans une ouverture attribuée (12), sous la forme d'un trou borgne, dans un support de poils en matière plastique faisant partie d'une brosse ultérieure, qui présente un côté avant (18) à partir de laquelle s'étend l'ouverture (12) dans le support de poils (10), le ou les poils présentant une extrémité de fixation (24) épaissie. Après l'insertion du ou des poils dans l'ouverture (12) à partir du côté avant (18) du support de poils (10), une impulsion d'impact étant exercée sur une partie de la circonférence ou toute la circonférence du bord avant (22) de l'ouverture (12), le bord est déformé plastiquement. La présente invention se rapporte également à un dispositif correspondant.
EP22744432.0A 2021-07-16 2022-07-04 Procédé et dispositif de fixation de poils dans un support de poils Pending EP4369986A1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE102021118502.5A DE102021118502A1 (de) 2021-07-16 2021-07-16 Verfahren und Vorrichtung zum Befestigen von Borsten in einem Borstenträger
PCT/EP2022/068485 WO2023285196A1 (fr) 2021-07-16 2022-07-04 Procédé et dispositif de fixation de poils dans un support de poils

Publications (1)

Publication Number Publication Date
EP4369986A1 true EP4369986A1 (fr) 2024-05-22

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Application Number Title Priority Date Filing Date
EP22744432.0A Pending EP4369986A1 (fr) 2021-07-16 2022-07-04 Procédé et dispositif de fixation de poils dans un support de poils

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EP (1) EP4369986A1 (fr)
CN (1) CN117769371A (fr)
DE (1) DE102021118502A1 (fr)
TW (1) TW202304345A (fr)
WO (1) WO2023285196A1 (fr)

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* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
KR102678545B1 (ko) * 2016-04-26 2024-06-25 지비 부쉐리 엔브이 브러시 제조 방법 및 디바이스
DE102019124307B3 (de) * 2019-09-10 2020-09-03 Gb Boucherie Nv Verfahren zum Befestigen einer Borste in einem Borstenträger sowie Vorrichtung hierfür

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TW202304345A (zh) 2023-02-01
DE102021118502A1 (de) 2023-01-19
WO2023285196A1 (fr) 2023-01-19
CN117769371A (zh) 2024-03-26

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