Classifications

• • A—HUMAN NECESSITIES
  • A46—BRUSHWARE
  • A46B—BRUSHES
  • A46B5/00—Brush bodies; Handles integral with brushware
  • A46B5/002—Brush bodies; Handles integral with brushware having articulations, joints or flexible portions
  • A46B5/0025—Brushes with elastically deformable heads that change shape during use
  • A46B5/0029—Head made of soft plastics, rubber or rubber inserts in plastics matrix
• • A—HUMAN NECESSITIES
  • A46—BRUSHWARE
  • A46D—MANUFACTURE OF BRUSHES
  • A46D3/00—Preparing, i.e. Manufacturing brush bodies
• • 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
  • A46B3/20—Brushes characterised by the way in which the bristles are fixed or joined in or on the brush body or carrier the bristles being fixed or joined in rubber bodies, e.g. in soft rubber
• • 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 process for the production of bristle goods, consisting of a bristle carrier made of elastic material with at least one substantially cylindrical recess for receiving a bristle bundle, which has at its fastening-side end a thickening connecting the bristles, the cross-section of which is larger than the narrowest cross-section Is recess, has and is inserted under pressure in the recess on the bristle carrier.
• the invention further relates to a device for carrying out the method and bristle articles produced according to it.
• bristle goods are understood to mean all products in which bristle bundles or individual bristles are attached to a carrier of any shape.
• This can be conventional brushes such as toothbrushes, body brushes, cleaning brushes, abrasive brushes, polishing brushes or scrubbers, brooms, brushes or bristle mats.
• the carrier can be a handle, handle, or device housing, tapes, strips or the like, or just preliminary products, which are subsequently integrated into a handle, a handle, a device or the like is used or connected to one another to form larger units.
• Bristle bundles are understood to mean bundles of any cross-section, for example round bundles, polygonal bundles, hollow bundles, bundle bundles or the like.
• the bristles are made of plastic and the thickening can be produced by melting the bristle ends and cooling and, if necessary, by post-forming.
• the bristle carrier is provided with preformed recesses and either in the region of the recess and / or the thickening on the bristle bundle is melted close to the surface and the bristle bundle with the thickening is pressed into the recess (US Pat. No. 4,609,228, US Pat. No. 4 637 660). After insertion, the melt of the bristle carrier flows around the thickening and, at the same time, the plastic components of the bristle bundle and carrier can fuse.
• thermoelastic joining method in which the wall of the recess and / or the thickening on the bristle bundle in its region near the surface are heated to temperatures below the melting temperature and then that
• Bristle bundle with thickening under thermoelastic Deforming is used. After cooling, the bundle with the thickening is firmly anchored in the carrier.
• the invention is based on the object of proposing a method and a device for producing bristle articles and bristle articles produced thereafter which permit cost-effective production with short working cycles, bristle articles with new usage properties also being created.
• the object of the invention is achieved in that the bristle bundle is aligned with its axis approximately to the axis of the recess in the bristle carrier and is driven into the recess by the action of a force on the thickening, the Wall of the recess springs elastically as it passes through the thickening and springs back in the driving-in direction behind the thickening until it rests against the bristles of the bristle bundle.
• the force to be applied for driving in depends largely on the modulus of elasticity of the material of the bristle carrier and on how the thickening and the recess are geometrically dimensioned or matched to one another. Depending on the type of bristle product to be manufactured, these parameters can be easily adjusted by a few Determine experiments. Driving forces of the required size can then also be generated without problems and transferred to the thickening on the bristle bundle in order to obtain a pull-out strength after driving in on the bristle bundle, which is in the range of conventionally produced bristle articles.
• the axes of the bristle bundle and recess are preferably aligned before being driven in, but a slight inclination or a slight offset is not harmful since the thickening centers itself when it is driven in.
• the method can be carried out not only with bristle bundles, but also with individual bristles, as long as these have only a thickening at their end on the fastening side.
• the force for driving in the bristle bundle is preferably applied uniformly to the projection of the thickening projecting annularly around the bristles of the bristle bundle on the circumference.
• the thickening also projects at least partially into the cross section of the cavity, but can also close off the latter in the form of a plate. In the case of such hollow bundles, the force for driving in the bristle bundles within the cavity on the thickening is brought into effect.
• the recess in the bristle carrier has an undercut.
• the force for driving in the bristle bundle is exerted on the thickening until it reaches the largest cross section of the recess behind the undercut.
• a bristle article for example a brush, has a plurality of bristle bundles and the bristle carrier has a corresponding number of recesses.
• the method according to the invention makes it possible to drive all the bristle bundles or groups of bundles simultaneously into the recesses on the bristle carrier.
• a force can also be exerted on the free ends of the bristle bundles, the bundle preferably being clamped on the circumference in order to prevent the bristles from buckling.
• the invention is based on a device with a receptacle for the bristle carrier and a holder for the bristle bundle.
• a device with a receptacle for the bristle carrier and a holder for the bristle bundle.
• the holder has a stamp which acts with its leading end face on the thickening on the bristle bundle, is driven axially in the direction of the receptacle with the bristle carrier and into the recess until the thickening is finally positioned is mobile.
• the stamp therefore moves together with the bristle bundle into the recess and displaces the elastically flexible wall of the recess outward until the thickening is finally positioned.
• the elastic wall of the recess springs back, clamps the thickening and at the same time encompasses the Bristles of the bundle insofar as they are located within the bristle carrier.
• the plunger can be designed as a sleeve which surrounds the bristle bundle on the outside and, with its annular end face, acts against the protrusion of the thickening projecting beyond the bristles of the bristle bundle.
• a sleeve-shaped stamp also serves to guide the bundle of bristles and applies the lateral displacement forces to the elastic material of the bristle carrier.
• the sleeve has an outer cross-section at its area acting on the protrusion of the thickening, which is not larger than the largest cross-section of the thickening, and then has a larger cross-section while forming a step. The step forms a stop which interacts with the surface of the bristle carrier for the driving depth of the bristle bundle.
• the stamp In the case of hollow bundles, the stamp is designed like a bolt. It engages in the hollow bundle and acts with its leading end face on the thickening which projects beyond the inner diameter of the hollow bundle. If the thickening is designed in such a way that it closes off the hollow bundle in the form of a plate, the stamp acts on the inside of the plate-shaped thickening.
• the stamp can have an approach of smaller diameter engaging in the annular space of the thickening, the step formed thereby on the stamp acting on the inner projection of the annular thickening when driven in.
• Bristle goods produced by the process according to the invention are characterized in that the bristle carrier consists of a material which is rubber-elastic at normal temperature, the elasticity of which is adjusted depending on the ratio of the cross sections of the recess and the thickening such that after the bundle has been driven into the recess the thickening is held in a form-fitting manner by elastic resetting of the material of the bristle carrier and the bristle bundle is closely enclosed by this at least over part of its length in the carrier.
• the invention proposes a rubber-elastic material which, on the one hand, permits the deformation necessary for inserting the bristle bundle with the thickening, and on the other hand has such a resilience that, on the one hand encompassing the thickening of the carrier material in a form-fitting manner and, on the other hand, encompassing the bundle of bristles, insofar as it is located within the carrier, and banding it in this way without leaving any significant cavities.
• the material for the carrier or its elasticity must be set and the geometrical dimensions of the recess and the thickening must be coordinated with one another in such a way that the bristle bundle can be inserted with reasonable effort, and on the other hand a pull-out strength is achieved which the respective intended use of the bristle product is sufficient.
• Materials that meet these conditions are natural and synthetic rubbers and a number of known elastomers.
• Bristle goods designed according to the invention also have improved usage properties, since the rubber elasticity of the carrier offers advantages in many applications, for example the risk of injury in the case of toothbrushes, cosmetic brushes, body brushes or the like is reduced. With brushes, brooms or the like for cleaning purposes, as well as with technical brushes, on the one hand the risk of damage to other objects in the movement area of the brush is reduced and the rubber elasticity results in favorable damping properties, which is particularly advantageous in the case of mechanically driven brushes.
• the recess on the bristle carrier is undercut, the smallest cross section of the recess being smaller than the cross section of the thickening on the bristle bundle.
• the form fit between the bundle of bristles and the carrier is ensured not only by its general elasticity, but also by the shape of the recess, the rubber elasticity ensuring that that the thickening can easily pass through the narrower cross section when inserting the bristle bundle.
• the opening has a larger cross section at its opening edge than the cross section of the bristle bundle and narrows conically in the direction of its smallest diameter. This initially makes it easier to drive in the bristle bundle, since the conical wall forms a kind of run-in slope for the thickening and the stamp.
• the bundle of bristles has the possibility to move transversely to its axis, which is advantageous in certain applications.
• the recess can also be designed as a through hole in the bristle carrier, so that the bristle bundle can be inserted into the carrier from one side or the other with the same axial orientation.
• the invention furthermore makes it possible to insert the bristle carrier made of rubber-elastic material with the bristle bundles used into a less elastic to rigid carrier by utilizing the elasticity, for example by the rigid carrier having a corresponding recess which has the rubber-elastic one Includes and clamps the frame like a frame. This recess can also be undercut if necessary.
• the rigid support can form the handle of the brush.
• the rubber elasticity of the carrier not only leads to the elastic flexibility of the carrier itself, but at the same time forms a damping bearing for the bristle bundle, so that it can be moved axially and transversely to the axis to a limited extent. Such flexibility is particularly desirable for toothbrushes.
• the agile speed of the bristle bundle can be supported in the latter embodiment in that the carrier has cavities on its side facing away from the bristle bundle. If this carrier is inserted into a rigid body, the rubber-elastic material of the carrier can escape into these cavities when force is exerted on the bristles, so that the bundle of bristles can move more or less axially or transversely to the cavities, depending on the arrangement of the cavities.
• the bristle carrier made of the rubber-elastic material can simultaneously form a handle and have greater rigidity in the area of the handle.
• bristle holder and handle are formed in one piece.
• a greater stiffness in the grip area can be achieved by stiffening inserts or coverings or by material-technical restructuring, e.g. can only be reached by foaming in the grip area. Larger cross-sections in the grip area can also provide the required rigidity.
• the bristle carrier is a hollow body with recesses open to the outside, the smallest cross section of which is smaller than the largest cross section of the thickening, and that the bristle bundle with the thickening with elastic deformation of the wall of the hollow body delimiting the recess in this is used.
• the hollow body can be produced in a blow or deep drawing process.
• the elasticity of the blown hollow body is used to make the bristle collars To be able to use del with its thickening and at the same time be able to fix it in a pull-out manner.
• This training also does not require thermal treatment.
• the hollow body is designed in such a way that the bottom of the recess is supported on an opposite wall of the hollow body, in order to absorb above all the pressure forces which occur during normal use of a brush.
• the thickening on the bristle bundle can be spherical, lenticular, disk-shaped or cylindrical, or it can be tapered in the axial direction of the bundle.
• the shape will be chosen on the one hand according to the required pull-out strength or the desired mobility of the bundle transversely to its axis.
• Figure 1 three process steps in connecting a bristle bundle with a bristle carrier with a first embodiment of the device
• Figure 2 several stages in the process of attaching another type of bundle with a second embodiment of the device
• FIG. 3 a third embodiment of the attachment of the bristle bundle in two process variants
• FIG. 4 several process stages in the attachment of the bristle bundle to a further embodiment of the bristle carrier;
• FIG. 5 a plurality of process stages when fastening a bundle of bristles in a bristle carrier designed as a hollow body;
• FIG. 6 a broken longitudinal section in the area of a toothbrush head
• Figure 7 is a plan view of Figure 6;
• Figure 8 shows a cross section through a brush in another embodiment
• Figure 9 a plan view of a toothbrush head in a further variant.
• FIGS. 1 to 4 each show only a section of a bristle carrier 1 made of a rubber-elastic material in the area of the attachment point of a bristle bundle 2.
• the bristle bundle 2 consists of a multiplicity of individual bristles 3 which have been melted at their fastening-side end to form a thickening 4, the thickening subsequently being flattened, for example compressed, so that it has a lens-like shape exhibits and protrudes the actual bundle outwards.
• the bristle carrier 1 is provided with a cylindrical blind hole 5, the diameter of which is smaller than the outer diameter of the thickening 4.
• the bristle bundle provided with the thickening 4 is driven into the blind hole 5 in the direction of its axis.
• a device with a stamp in the form of a sleeve 6 is used for this purpose, into which the bundle of bristles is tightly inserted.
• the sleeve is drawn in at its front end via a step 7 to a section 8 with a smaller diameter.
• the outside diameter in the area of section 8 should not be larger than the outside diameter of the thickening.
• the end face 9 of the section 8 of the sleeve 6 acts on the protrusion of the thickening 4, which protrudes beyond the outer diameter of the bundle of bristles 2.
• Wall of the blind hole 5 is displaced to the outside due to the rubber elasticity of the bristle carrier 1 until finally the thickening 4 hits the bottom of the blind hole 5.
• the sleeve 6 is then pulled (FIG. 1 c), so that the wall of the blind hole springs back in the region 11 and the thickening 4 and the bristles of the bundle 2 are tightly clamped over a certain length.
• the sleeve can also be closed at its trailing end and, with this closed end face, can exert an additional force on the free end of the bristle bundle to drive in the bundle.
• the bristle carrier 1 has a through hole 12 which consists of a section 13 larger and a section 14 smaller
• a bristle bundle 2 in the form of a hollow bundle 15 is used.
• the hollow bundle 15 is also melted at its fastening-side end to form an annular thickening 16 here, and this is flattened by post-forming.
• a bolt-like is used to insert the hollow bundle 15 Stamp 17, which tapers over a level 18.
• the tapered section 19 extends through the free interior of the annular thickening 16 (FIG. 2a).
• the wall of the hole section 13 with the larger inside diameter is displaced outwards until the annular thickening 16 sits on the step between the two sections 13 and 14 of the hole.
• the wall springs back in the area of the larger section 13 of the through hole 12, as a result of which the annular thickening 16 is anchored.
• the wall in the region of section 13 also fits snugly against the outside of the bristle bundle, whereupon the stamp 17 is pulled.
• a bristle carrier 1 is provided with a through hole 21 with a constant diameter over the thickness of the bristle carrier (FIG. 3a).
• the bristle bundle 2 with its thickening 4 ahead can be injected into the bristle carrier 1 from above according to directional arrow 22 (FIG. 3b) or with the bristles ahead according to directional arrow 23 (FIG. 3c).
• the bristle carrier 1 again has a two-stage through hole 24, the narrower section 25 of which is arranged in front of the further section 26 in the driving-in direction.
• a bundle of bristles 2 with the thickening 4 is again injected by means of a sleeve 6 corresponding to FIG.
• the blind hole 24 is at least in its section 25 narrower than the outer diameter of the thickening 4, so that after insertion (FIG. 4b) and retraction of the sleeve 6 (FIG. 4c) the thickening 4 in the another section 26, while the wall of the
• Section 25 springs back and the thickening on its upper section and the bristle bundle in the region of section 25 tightly.
• the bristle bundle is thus effectively anchored to the bundle against tensile forces.
• the bristle carrier 1 can be used in a recess of a separately manufactured handle or the like.
• the recess 5, 13, 21, 24 can expand conically in the region of its opening edge in order to facilitate driving in the bundle.
• the conical widening also gives the bundles the possibility, when using the brushes, to deviate transversely to their axis more than the elasticity of the wearer allows anyway.
• the bristle carrier 1 is designed as a relatively thin-walled hollow body 27. It has approximately parallel walls 28 and 29, of which the wall 28 forms the fastening side, the wall 29 the visible or grip side. Blind holes 30 are formed in the wall 28 and extend with their bottom 31 to close to the wall 29.
• a bristle bundle 2 with a thickening 4 is driven in by means of a sleeve 6 corresponding to FIG. 1, the wall of the blind hole 30 expanding (FIG. 5b) and springing back again after pulling the sleeve 6 around the thickening 4 and the fastening-side section of the bristle bundle 2 to include closely (Figure 5c).
• the bottom 31 of the blind hole 30 bears against the wall 29 of the hollow body 27.
• the head 31 is shown a toothbrush 30 in section '.
• the head 31 has one on its bristle side Recess 32 in which a bristle carrier 1 made of rubber-elastic material with bristle bundles 2 fastened therein by driving in is inserted.
• the bouncing can take place according to one of the previously described method variants.
• the recess 32 has an outline which forms a somewhat smaller cross section than the bristle carrier 1, so that it can also be fastened in the brush head 31 by insertion.
• the bristle carrier 1 can of course also be glued in, welded in or anchored to the brush head 31 in some other way.
• FIG. 7 shows a plan view of the bristle field of the brush head 31 according to FIG. 6.
• FIG. 8 shows an exemplary embodiment in which the bristle carrier 1 is also inserted into a frame-like handle, handle 33 or the like.
• the bristle carrier 1 made of rubber-elastic material has cavities 34 on its side facing away from the bristles 2, so that the bundle of charges 2 has increased mobility in the axial direction, but also in every direction transverse to the bristle carrier 1
• a toothbrush according to FIG. 9 can be equipped with the brush head 35 with a bristle carrier 1 whose bristle bundles 2 have a different mobility in the fields 36 than in the fields 37, so that the bristles are at Use to better adapt the surfaces to be cleaned and their various contours.
• This can be supported by the fact that the recesses 5 in the bristle carrier 1 (for example FIG. 1) expand conically in the region of the opening edge, which at the same time forms an entry slope for the thickening or the stamp.
• the handle 30 can also be made of the same material as the bristle carrier 1 and only through correspondingly larger cross sections, through inserts or wrappings or through material engineering restructuring, for example by Foam, be stiffer.

Landscapes

• Engineering & Computer Science (AREA)
• Manufacturing & Machinery (AREA)
• Brushes (AREA)
• Cleaning In General (AREA)
• Heating, Cooling, Or Curing Plastics Or The Like In General (AREA)
• Polishing Bodies And Polishing Tools (AREA)

Priority Applications (14)

Applications Claiming Priority (2)

Related Child Applications (1)

Publications (1)

Family

ID=7755016

Family Applications (1)

Country Status (22)

Cited By (1)

Families Citing this family (17)

Citations (7)

Family Cites Families (9)

• 1995
  • 1995-02-27 DE DE19506597A patent/DE19506597A1/de not_active Withdrawn
• 1996
  • 1996-02-14 UA UA97094793A patent/UA46009C2/uk unknown
  • 1996-02-14 DE DE59606881T patent/DE59606881D1/de not_active Expired - Fee Related
  • 1996-02-14 CN CN96192185A patent/CN1176582A/zh active Pending
  • 1996-02-14 EP EP96904077A patent/EP0812143B1/de not_active Expired - Lifetime
  • 1996-02-14 ES ES96904077T patent/ES2158287T3/es not_active Expired - Lifetime
  • 1996-02-14 CA CA002212721A patent/CA2212721A1/en not_active Abandoned
  • 1996-02-14 KR KR1019970705966A patent/KR19980702560A/ko not_active Application Discontinuation
  • 1996-02-14 HU HU9702429A patent/HUP9702429A3/hu unknown
  • 1996-02-14 AU AU48311/96A patent/AU698713B2/en not_active Ceased
  • 1996-02-14 AT AT96904077T patent/ATE200961T1/de active
  • 1996-02-14 BR BR9607048A patent/BR9607048A/pt not_active Application Discontinuation
  • 1996-02-14 JP JP8525985A patent/JPH11500932A/ja active Pending
  • 1996-02-14 WO PCT/EP1996/000616 patent/WO1996026658A1/de not_active Application Discontinuation
  • 1996-02-14 PL PL96321940A patent/PL182670B1/pl unknown
  • 1996-02-14 CZ CZ972308A patent/CZ230897A3/cs unknown
  • 1996-02-14 EA EA199700202A patent/EA000153B1/ru not_active IP Right Cessation
  • 1996-02-15 TW TW085101914A patent/TW302274B/zh active
  • 1996-02-15 IN IN277CA1996 patent/IN186776B/en unknown
  • 1996-02-26 ZA ZA961523A patent/ZA961523B/xx unknown
  • 1996-02-26 AR ARP960101526A patent/AR001037A1/es unknown
• 1997
  • 1997-08-27 FI FI973534A patent/FI973534A0/fi unknown
  • 1997-08-27 NO NO973937A patent/NO973937L/no not_active Application Discontinuation

Patent Citations (7)

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