EP2552276A1 - Method for connecting bristle supports having bristles to cover parts during brush production - Google Patents
Method for connecting bristle supports having bristles to cover parts during brush productionInfo
- Publication number
- EP2552276A1 EP2552276A1 EP11711453A EP11711453A EP2552276A1 EP 2552276 A1 EP2552276 A1 EP 2552276A1 EP 11711453 A EP11711453 A EP 11711453A EP 11711453 A EP11711453 A EP 11711453A EP 2552276 A1 EP2552276 A1 EP 2552276A1
- Authority
- EP
- European Patent Office
- Prior art keywords
- cover
- bristle carrier
- sacrificial structures
- brush
- plasticized
- 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.)
- Granted
Links
- 238000000034 method Methods 0.000 title claims description 30
- 238000004519 manufacturing process Methods 0.000 title claims description 8
- 230000002093 peripheral effect Effects 0.000 claims abstract description 23
- 238000010438 heat treatment Methods 0.000 claims abstract description 7
- 229920001169 thermoplastic Polymers 0.000 claims abstract description 4
- 238000004140 cleaning Methods 0.000 claims abstract description 3
- 239000012815 thermoplastic material Substances 0.000 claims description 5
- 239000000835 fiber Substances 0.000 claims description 4
- 230000008878 coupling Effects 0.000 claims description 3
- 238000010168 coupling process Methods 0.000 claims description 3
- 238000005859 coupling reaction Methods 0.000 claims description 3
- 230000000630 rising effect Effects 0.000 claims description 3
- 239000013536 elastomeric material Substances 0.000 claims description 2
- 230000000717 retained effect Effects 0.000 claims 1
- 239000004416 thermosoftening plastic Substances 0.000 claims 1
- 239000000463 material Substances 0.000 abstract description 9
- 229920001971 elastomer Polymers 0.000 abstract description 2
- 239000000806 elastomer Substances 0.000 abstract description 2
- 238000003466 welding Methods 0.000 description 10
- 238000007906 compression Methods 0.000 description 4
- 230000006835 compression Effects 0.000 description 4
- 230000005855 radiation Effects 0.000 description 3
- 239000000969 carrier Substances 0.000 description 2
- 238000001746 injection moulding Methods 0.000 description 2
- 239000000155 melt Substances 0.000 description 2
- 238000004026 adhesive bonding Methods 0.000 description 1
- 238000011109 contamination Methods 0.000 description 1
- 230000001627 detrimental effect Effects 0.000 description 1
- 238000011161 development Methods 0.000 description 1
- 230000018109 developmental process Effects 0.000 description 1
- 238000005485 electric heating Methods 0.000 description 1
- 230000007717 exclusion Effects 0.000 description 1
- 238000005304 joining Methods 0.000 description 1
- 230000014759 maintenance of location Effects 0.000 description 1
- 238000009732 tufting Methods 0.000 description 1
- 238000002604 ultrasonography Methods 0.000 description 1
Classifications
-
- A—HUMAN NECESSITIES
- A46—BRUSHWARE
- A46B—BRUSHES
- A46B7/00—Bristle carriers arranged in the brush body
Definitions
- the invention relates generally to a method of making brushes, and more particularly to a method of bonding bristled bristle carriers to cover members in the manufacture of brushes, particularly toothbrushes.
- a brush body is provided with an array of holes ("hole pattern") corresponding to the desired arrangement of bristles. Bundles or tufts of bristles are then inserted into the holes of the brush body and anchored therein by means of impressed small metallic anchors or by means of loops.
- the bristle tufts are attached to a small brush head plate without the use of loops or anchors. and the carrier plate is then inserted into or attached to a brush body or handle.
- brush handles are made with a hole pattern that corresponds to the desired tuft pattern. Bristle tufts are then inserted into these holes and attached to the brush handles. The attachment ends of the tufts are then covered with a small plate, which in turn is attached to the brush handle.
- brush elements of any type and shape can be mounted in the holes of the top plate or the brush body: bristles or bristle bundles of thermoplastic material, Reinigurigsele of elastomeric material, which are formed for example by injection molding, or natural fibers.
- the brush elements of the bristled head plates or brush body can be contoured and - in the case of bristle bundles - already rounded at the free ends. But it is also possible to produce any contouring or rounding in a subsequent processing step.
- To attach the top plate to a brush body it is known to insert the top plate in a recess in the handle and to weld the two parts by means of ultrasound. This is a fast and reliable way to join the parts.
- the disadvantage of this method is that a gap or a cavity between the back of the top plate and the end face of the recess remains in the brush body. It can not be ruled out that contaminations that are detrimental to hygiene can be found in these gaps.
- the invention makes it possible to bring together bristle carrier and cover without intervening gaps or voids quickly and safely with each other.
- a bristle carrier made of thermoplastic material with through-holes and a peripheral edge surrounding these holes is produced.
- the bristle carrier may be a top plate or a brush handle.
- brush elements such as bristles, bristle bundles, cleaning elements made of elastomer material and natural fibers are then attached.
- a cover part is formed and provided as part of a brush body of thermoplastic material with a mounting area for the bristle carrier and with sacrificial structures formed in the mounting area and a connection edge surrounding the mounting area.
- the surrounding the holes peripheral edge of the bristle carrier and the sacrificial structures of the cover and its connection edge are then plasticized by heating.
- the outer surfaces of the cover and the bristle carrier are excluded from the plasticization, since they are a part of the brush body and should not be deformed by heating. This exclusion can be done by means of heat shields with which radiation heat is held. Then bristle carrier and cover are pressed against each other, the following happens: The plasticized peripheral edge of the bristle carrier is welded to the plasticized connection edge of the cover. But excluded from the plasticization outer surfaces of the cover and the bristle carrier remain in shape. The plasticized mass of the sacrificial structures now flows in the framed by the connecting edge of the cover, between bristle carrier and cover remaining volume and fills this volume at least largely. Thus, the retention of gaps or voids between bristle carrier and cover is avoided.
- the sacrificial structures can be formed in many forms.
- they are designed as fine ribs, tines or blocks, which rise from the bottom of the mounting portion of the cover.
- the sacrificial structures can be well controlled e.g. also be contactlessly plasticized by radiant heat for the welding process.
- the ribs may be formed as fine longitudinal ribs and / or transverse ribs, or as surrounding and spaced apart rings.
- Other advantageous embodiments are blocks that have cross-shaped, star-shaped or annular cross-sections.
- Another alternative is sacrificial structures in the form of a plateau rising from the bottom of the mounting area of the cover part or several such plateau areas. In any case, the sacrificial structures are dimensioned so that their plasticized mass fills the remaining between bristle carrier and cover volume.
- the bristle carrier is a top plate and the cover part is formed on a brush handle or brush handle, or conversely, the brush head is directly brushed, wherein the cover member is formed as a cover plate completing the brush body.
- the brush head may then be shaped as a small round disc and the cover plate provided with a pin for coupling to a drive mechanism, as required for the so-called electric toothbrushes.
- Figure 1 is an exploded perspective view of a bristled bristle carrier plate and a brush handle prior to assembly;
- FIG. 2 shows a schematic sectional view for illustrating a method step in which thermoplastic plastic parts are plastified for welding together;
- FIG. 3 is a perspective partial view of a finished toothbrush
- FIG. 4 shows a cross section through the head region of the toothbrush according to FIG. 3;
- Figure 5 to Figure 10 variants of various embodiments of attachment areas on the brush head with plastifiable sacrificial structures
- Figure 11 is an exploded perspective view of a circular bristle carrier plate and its cover prior to assembly
- Figure 12 is a perspective view of the brush assembled from the parts shown in Figure 11;
- FIG. 13 shows a further variant of a brush handle with a lowered head attachment region and plasticizable material mounted therein
- FIG. 14 is an exploded perspective view of a bristled bristle carrier plate and brush handle prior to assembly in another embodiment;
- FIG. 14a shows a partial section of the brush handle with the heat shield attached;
- FIG. 14a shows a partial section of the brush handle with the heat shield attached;
- FIG. 14b shows a partial section of the bristle carrier plate with the heat shield attached
- FIG. 14c shows a partial section of the connecting region between brush handle and bristle carrier plate
- FIG. Figure 15 is an exploded perspective view of a bristled bristle carrier plate and a brush handle prior to assembly in another embodiment
- FIG. 15a is a partial section of the bristle carrier plate with attached heat shield;
- FIG. 15b shows a partial section of the brush handle with the heat shield attached;
- FIG. 15c shows a partial section of the bristle carrier plate with attached heat shield according to a variant
- FIG. 15d shows a partial section of the connecting region between brush handle and bristle carrier plate in the variant according to FIG. 15a or 15c
- FIG. 15c shows a partial section of the bristle carrier plate with attached heat shield according to a variant
- FIG. 15e shows a partial section of the bristle carrier plate with attached heat shield according to a further variant
- FIG. 15f shows a partial section of the connecting region between brush handle and bristle carrier plate in the variant according to FIG. 15e
- FIG. 15f shows a partial section of the connecting region between brush handle and bristle carrier plate in the variant according to FIG. 15e
- FIG. 15f shows a partial section of the connecting region between brush handle and bristle carrier plate in the variant according to FIG. 15e
- FIG. 16 is an exploded perspective view of a bristled bristle carrier plate and a brush handle prior to assembly in another embodiment;
- FIG. 16a shows a partial section of the brush handle with the heat shield attached;
- FIG. 16a shows a partial section of the brush handle with the heat shield attached;
- FIG. 16b shows a partial section of the bristle carrier plate with the heat shield attached
- FIG. 16c shows a partial section of the connecting region between brush handle and bristle carrier plate
- FIG. 16d shows a partial section of the bristle carrier plate with attached heat shield according to a further variant
- FIG. 16e shows a partial section of the connecting region between the brush handle and the bristle carrier plate in the variant according to FIG. 16d;
- FIG. 17 a shows a partial section with welding aids in the form of fine projections attached to the peripheral edge of the bristle carrier plate
- FIG. 17b shows a variant of the welding aid
- FIG. 1 of a toothbrush handle of the brush neck 10 and the head part 12 are shown, the latter with a mounting portion 14 for one already finished bristle carrier bristles in the form of a bristle carrier plate 16.
- the bristle carrier plate 16 is equipped with differently shaped and profiled bristle bundles, which are preferably fixed by the AFT method mentioned above.
- other fastening methods are possible, for example the injection molding of elastomeric parts or the gluing of natural fibers.
- the mounting portion 14 of the head portion 12, also called cover member is provided with sacrificial structures in the form of annular fine ribs surrounding each other, which rise from the bottom of the mounting portion. They are surrounded by the outer peripheral edge 12a of the head part.
- the shape of the sacrificial structures is highly variable and determined by the process parameters of the chosen attachment method.
- the sacrificial structures 18 provide, on the one hand, the material for the welding to the bristle carrier plate 16 and, on the other hand, the necessary mass in order to completely fill the space present between the head part 12 and the bristle carrier plate 16.
- the bristled bristle carrier plate 16 consists of the head plate 20 and the bristle tufts 22 anchored thereto, which are fused on the back of the head plate 20 and optionally form a continuous fused layer.
- a heater is introduced, which is symbolically represented here as an electric heating coil 24.
- This heating device 24 preferably heats the peripheral edge 20a of the head plate 20, as illustrated by small arrows in FIG. 2, and the sacrificial structures 18 and the connecting edge 12b formed on the peripheral edge 12a of the head part 12 on the opposite side.
- FIG. 3 shows the finished brush head. From Figure 4 it can be seen that between the back of the bristle carrier plate 16 and the head part 12 no dead volume remains because the sacrificial structures in the plasticized state. and have penetrated under pressure in all cavities and have filled them. In Figure 4 it is also seen that the connecting edge of the head portion 12 is welded to the peripheral edge of the bristle carrier plate 16, but while the outer surface of the head portion 12 is intact and preserved in shape.
- FIGS. 5 to 10 are particular embodiments, each of which has particular advantages for the method of connection used, in terms of plasticizability, flow behavior during welding and compression, and in terms of the ability to completely fill all cavities.
- the sacrificial structures are again designed as fine ribs surrounding each other in a ring shape, but in lesser numbers than in FIG. 1, and steps 18 a are formed at the bottom of the fastening area, which surround the annular ribs 18.
- the sacrificial structures are formed as fine blocks, which are cross-shaped in cross-section. Also in Figure 9, the sacrificial structures are small blocks, but here they are annular in cross section.
- FIG. 11 shows an embodiment in which the bristled bristle carrier 30 is part of a round brush body, as used in so-called electric toothbrushes.
- a cover acts here a cover plate 32, which is also designed round and on his the Borstenisme 30 facing side has a mounting area with molded sacrificial structures 18 in the form of concentric annular fine ribs.
- the cover plate 32 is provided on its side facing away from the bristle carrier back with a pin 34 which is intended for coupling to a drive mechanism. Also in the embodiment shown in Figure 11, the parts are welded analogously to the method illustrated in Figure 2; The result is shown in FIG.
- a variant of the embodiment shown in Figures 1 to 4 is that, as shown in Figure 13, the head portion 12 is offset from the brush neck 10 by a step 13.
- the sacrificial structures 18 are formed in a similar manner as in FIG.
- the bristle carrier plate has a correspondingly greater thickness.
- FIG. 14 illustrates how the selective plasticization of the regions to be welded and the sacrificial structures may occur in the practice of the method.
- the flat peripheral edge 20a of the bristle carrier plate and the also flat connecting edge 12b of the brush handle are welded.
- FIG. 14 a when heated by heat radiation, the outer edge of the brush handle 12 surrounding the surface to be plasticized is covered with a correspondingly shaped heat shield 30.
- the outer surface of the bristle carrier plate not to be plasticized namely the side surface and the outer edge of the front surface, is covered with a suitably shaped heat shield 32.
- the result after the compression of the parts is shown in Fig. 14c.
- the welded joint is indicated by an arrow "S".
- the sacrificial structures form a melt 18a, which fills the gap of the connected parts.
- FIGS. 15 and 16 show further variants of the welded connection between brush stem 12 and bristle carrier platelets 20.
- the brush handle 12 in the region of the receptacle for the bristle carrier plate has a step 23.
- Fig. 15a or 15c is the Borstenisme platelets are welded to both the flat peripheral edge and on the side surface. Accordingly, only the edge of the front side (FIG. 15 a) or this edge and a small part of the side surface (FIG. 15 c) of the bristle carrier plate 20 are covered with the heat shield 32. Further, with the heat shield 30 which is adjacent to the step 23 outer surface of the brush handle 12 is covered. The result after the compression of the parts is shown in FIG. 15d. Small arrows in the figure point to the welded surfaces. However, if the side surface of the bristle carrier plate 20 is to be excluded from the welding, the heat shield 32 also covers the side surface as shown in Fig. 15e; the result is shown in Fig. 15f.
- the bristle carrier plate 20 has an angled peripheral edge whose end face forms a connecting edge 20c.
- the corresponding connecting edge 12b of the brush handle is located at the peripheral edge of the sacrificial structures 18.
- the heat shield 30 covers the outer surface of the brush handle 12 surrounding the connecting edge 12b. If the side surface of the bristle carrier plate 20 is also to be welded, only the edge of the front side is covered with the heat shield 32, as shown in FIG. 16b.
- Fig. 16c shows the result after the compression of the parts. Small arrows in Fig. 16c show the welded surfaces.
- FIG. 17 A fine zinc-shaped projections or elevations are formed on the surfaces to be welded at the peripheral edge of the bristle carrier plate 20, which are plasticized very quickly when heated by means of radiation. According to FIG. 17 b, these projections 40 may be limited to the flat peripheral edge of the bristle carrier plate 20. According to FIG. 17
- both the protrusions 40 on the flat peripheral edge of the bristle carrier plate 20 and corresponding protrusions 42 on the connecting edge of the bristle handle 12 are provided.
- the non-plasticized peripheral edge 12a has a greater thickness than the sacrificial structures measured in plan view.
- the thickness of the non-plasticized peripheral edge 12 a is viewed in plan view also a maximum of 1, 5 mm, preferably 0.5 to 1 mm.
- the maximum thickness for the sacrificial structure has been found to be a maximum thickness of 1.5 mm, the thickness being preferably only 0.5 to 1 mm.
Landscapes
- Brushes (AREA)
Abstract
Description
Claims
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DE201010013124 DE102010013124A1 (en) | 2010-03-26 | 2010-03-26 | Method for joining bristled bristle carriers to cover parts in brush production |
PCT/EP2011/001420 WO2011116935A1 (en) | 2010-03-26 | 2011-03-22 | Method for connecting bristle supports having bristles to cover parts during brush production |
Publications (2)
Publication Number | Publication Date |
---|---|
EP2552276A1 true EP2552276A1 (en) | 2013-02-06 |
EP2552276B1 EP2552276B1 (en) | 2015-11-25 |
Family
ID=44211348
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
EP11711453.8A Active EP2552276B1 (en) | 2010-03-26 | 2011-03-22 | Method for connecting bristle supports having bristles to cover parts during brush production |
Country Status (5)
Country | Link |
---|---|
EP (1) | EP2552276B1 (en) |
CN (1) | CN102821649B (en) |
DE (1) | DE102010013124A1 (en) |
ES (1) | ES2557589T3 (en) |
WO (1) | WO2011116935A1 (en) |
Families Citing this family (5)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
USD769626S1 (en) | 2013-12-19 | 2016-10-25 | Colgate-Palmolive Company | Refill head for electric toothbrush |
USD776435S1 (en) | 2013-12-19 | 2017-01-17 | Colgate-Palmolive Company | Head portion of a toothbrush |
USD766581S1 (en) | 2013-12-19 | 2016-09-20 | Colgate-Palmolive Company | Electric toothbrush handle |
USD790860S1 (en) | 2015-11-25 | 2017-07-04 | Colgate-Palmolive Company | Electric toothbrush brush head |
USD794333S1 (en) | 2015-11-25 | 2017-08-15 | Colgate-Palmolive Company | Electric toothbrush brush head |
Family Cites Families (6)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US5035468A (en) * | 1990-05-11 | 1991-07-30 | James Brown | Surgical scrub brush |
DE19542393A1 (en) * | 1995-11-14 | 1997-05-15 | Zahoransky Anton Gmbh & Co | Making synthetic brushes esp tooth brushes |
EP0972465B1 (en) * | 1998-07-14 | 2003-04-02 | Firma G.B. BOUCHERIE, naamloze vennootschap | Method for manufacturing brushes and brush manufacturing machine applying this method |
CA2596685C (en) * | 2005-02-02 | 2014-04-01 | Sunstar Inc. | Toothbrush |
DE102006011671A1 (en) * | 2006-03-14 | 2007-09-20 | Firma G.B. Boucherie N.V. | Procedure for the production of toothbrushes by fusing the axial end of bundled fibers, comprises contacting fiber ends with a heated area and arranging a foil between the fiber ends and the opposite surface of a heated stamp |
DE102009058608B4 (en) * | 2009-12-17 | 2023-02-02 | Gb Boucherie Nv | Method of connecting brush head plates to brush bodies |
-
2010
- 2010-03-26 DE DE201010013124 patent/DE102010013124A1/en not_active Withdrawn
-
2011
- 2011-03-22 CN CN201180015848.6A patent/CN102821649B/en not_active Expired - Fee Related
- 2011-03-22 WO PCT/EP2011/001420 patent/WO2011116935A1/en active Application Filing
- 2011-03-22 EP EP11711453.8A patent/EP2552276B1/en active Active
- 2011-03-22 ES ES11711453.8T patent/ES2557589T3/en active Active
Non-Patent Citations (1)
Title |
---|
See references of WO2011116935A1 * |
Also Published As
Publication number | Publication date |
---|---|
DE102010013124A1 (en) | 2011-09-29 |
WO2011116935A1 (en) | 2011-09-29 |
CN102821649B (en) | 2015-01-14 |
CN102821649A (en) | 2012-12-12 |
ES2557589T3 (en) | 2016-01-27 |
EP2552276B1 (en) | 2015-11-25 |
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