CN103442616B

CN103442616B - For the manufacture of the method and apparatus of brush

Info

Publication number: CN103442616B
Application number: CN201180069189.4A
Authority: CN
Inventors: B·G·保彻瑞
Original assignee: GB Boucherie NV
Current assignee: GB Boucherie NV
Priority date: 2011-03-11
Filing date: 2011-10-06
Publication date: 2016-01-13
Anticipated expiration: 2031-10-06
Also published as: WO2012123004A1; EP2683271B1; CN103442616A; EP2683271A1; DE102011013621B4; DE102011013621A1; ES2647582T3

Abstract

Propose a kind of method and apparatus for the manufacture of brush (10), sequentially take out bristle tuft (16) from bristle storage (44), wherein said bristle is settled by parallel packing.The bristle tuft (16) of described taking-up is sent to the substrate (12) of described brush (10) by means of a conveyer (18).Sequentially described bristle tuft (16) is pushed into the hole (14) of attaching troops to a unit from the dorsal part of described substrate (12), wherein between described conveyer (18) and the dorsal part of described substrate (12), be provided with one and there is the guided plate turning to passage, by the described described hole (14) turning to passage described bristle tuft (16) to be pushed in described substrate (12).Subsequently, without anchor pole ground, bristle tuft (16) is fixed on described substrate (12).

Description

For the manufacture of the method and apparatus of brush

Technical field

The present invention relates to a kind of method and apparatus for the manufacture of brush.

Background technology

The known different method for the manufacture of brush.Conventional brush body is provided with the setting of hole (" casement "), and it is corresponding to the setting of the expectation of bristle.The bundle of bristle or bundle to be so inserted in the hole of brush body and wherein by means of the little anchor metal of press-in or by means of staple by anchoring.

In the method for the alternative for the manufacture of brush, described method is being only implemented in several years and described method is called as AFT method (planting hair without anchor), do not apply staple or bristle tuft is fixed in little head plate by anchor, and loading plate to be inserted in brush body or handle or fixed thereon subsequently.In a modification of AFT method, manufacture the brush holder with casement, described casement is corresponding to the pieces mould expected.So bristle tuft to be inserted in this some holes and to be fixed on brush handle.The anchor portion of pieces covers with little plate subsequently.

Summary of the invention

The present invention relates to a kind of method and apparatus for the manufacture of brush assembled in described AFT method.

The invention provides a kind of method and a kind of device, it simply and particularly quickly work and be non-maintaining.

Method according to the present invention is especially for manufacturing toothbrush and being provided with following steps:

Sequentially take out bristle tuft from bristle storage, wherein said bristle is settled by parallel packing;

The bristle tuft of described taking-up is sent to the substrate of a part for the brush that a formation completes by means of a conveyer, it has the hole for holding each bristle tuft;

Sequentially described bristle tuft is pushed into the hole of attaching troops to a unit from the dorsal part of described substrate, wherein between described conveyer and the dorsal part of described substrate, be provided with one and there is the guided plate turning to passage, by the described passage that turns to, described bristle tuft is pushed in the described hole of described substrate, and

Without anchor pole ground, bristle tuft is fixed on described substrate.

In the method according to the invention successively that is sequentially from a bristle storage particularly a Storage Box take out bristle tuft and send it to substrate.This substrate can or portion's section of a kind of plate of being connected with brush body or brush body self.The positive side of substrate is such side, the bristle of brush subsequently with it away from, in contrast dorsal part is the side usually closed, that is does not have the side of bristle.Guided plate is arranged between conveyer and the dorsal part of substrate, and described guided plate has and turns to passage, by the described described hole turning to passage described bristle tuft to be pushed in described substrate.Tiltedly directed pieces can be realized thus or be integrally a common large pieces by multiple pieces in substrate, thus such as produce bristle tuft extending longitudinally.Also different pieces geometries can be realized, if such as turn to the entrance of passage to be circular, so outlet can have have an angle or in general non-circular geometry, although thus pieces always takes out from Storage Box with identical cross section geometry, realize different cross section geometries in substrate.What turn to passage therefore as described in " turning to " with concept to make each bristle or whole pieces perpendicular to straight line pushes direction skew.

Be possible in this multiple modification, they also can at random combine mutually:

Described move towards with turning to passage and described hole deviation and described pieces is tiltedly on the spot anchored in described substrate and/or

Be provided with multiple overlapped passage towards the common hole of in substrate trend (wherein this also such as one is had tiltedly move towards turn to passage to be attached in substrate a common hole along the passage pushing direction trend), thus multiple pieces to be pushed in the different passages be arranged side by side and in one that is pushed in substrate through described passage common hole so as to be formed a common pieces and/or

Be provided with at least one and turn to passage, it holds multiple pieces, to make them be integrally a common pieces, wherein this turns to passage preferably to have multiple entrance side by side, be integrally one by each passage described in described entrance and common turned to passage, and/or

At least one turns to passage to have an entrance, turns to the geometry of the outlet of passage described in its geometry is different from.

Describedly the outlet of passage is turned to usually to have the geometry identical with the hole of the vicinity in substrate and size.

Embodiment proposes, and the dorsal part that described guided plate is placed to substrate left described substrate fix described pieces on substrate before.

Because bristle tuft sequentially that is is in turn directly clogged in substrate separately, so do not need high the mating of instrument and other substrates in device side yet.

In addition mostly cooperate with the support of a tool side in the prior art, the hole of described support is exactly corresponding to the hole in substrate.First fill this support with bristle tuft and subsequently this support be sent to substrate to be filled.The manufacture of multiple support worked in one apparatus is relatively expensive.In addition device is expensive for the remodeling of other brush.

This remodeling can be designed very simply in the method according to the invention and in a device in accordance with the invention.

In the method according to the invention, the position of substrate and the static tools for alignment pushed be used for for each hole to be filled are also moved then.For this reason one may be, described substrate is at least moved along both direction for pushing of described order, to be aimed at bristle tuft described to be pushed in described hole to be filled.

The method can be matched with brand-new pieces mould easily as directly produced.

If use the positioner of a programmable at least diaxon of freedom, particularly freely the industrial robot of programmable preferred diaxon move described substrate, particularly this method can be matched with new mould very fast.

Especially advantageously, sequentially described bristle tuft is transported until described final position by a pieces receiver, be pushed into described hole to be filled from bristle tuft described in described final position.Separately but also for transmission therefore need an only movement not only for bristle tuft, it can be such as that the circular arc of pieces receiver moves or moves linearly.

Pieces receiver also must reciprocally not move forcibly between accommodated position and outgoing position.Also can consider, be provided with the pieces receiver of an annular or circle, it for good and all rotates along a direction.

The bristle of application is made up of plastics.

The advantage that the filling of the dorsal part of bristle tuft has is, pieces is so given prominence to, as desired, independent of the length tolerance of each bristle from substrate in positive side due to the usual stopper section in positive side.In addition the bristle with bristle tips, the such as conglobate sharp-pointed bristle tips of preprocessing is selectively also used.

According to preferred embodiment, in described conveyer, during described pieces is pushed described substrate, only apply axial compressive force to described bristle tuft.That is bristle tuft is not by radial clamping.When clamping, that is pieces end is expanded in gap, and this makes to import in hole and becomes difficult.Such radial clamping force particularly occurs in so-called tension frame.

Because described substrate usually has little thickness and the length in hole (keeping pieces by described hole) is equally correspondingly little, so be provided with a favourable method step, namely there is in the prelocalization one pushing described bristle tuft on the positive side of described substrate in device side the guiding piece of through hole.Described bristle tuft via described hole by the through hole that is so inserted in described guiding piece.Preferably, right instead of compulsory situation is, described pieces is also given prominence to from described guiding piece in positive side.

The guiding piece of described positive side can be configured to the clamping device for described pieces, and such as its method is that described through hole has so large cross section compared to the described pieces be pushed into wherein, and described pieces is located in described through hole with press-fit.If the guided plate of dorsal part is separated with substrate backward, so the clamping of pieces stops extracting of pieces.

The anterior end of described pieces can contact the casting die that has shape exterior feature, to complete the brush finish that has type exterior feature between the erecting stage of described substrate or afterwards.Described brush finish is the machined surface of the positive side of brush, and it is formed by bristle ends.This casting die can or exist when clogging and extruded by relative to bristle as stopper section or after filling, and described bristle to abut on casting die and moulds the shape of casting die thus.

According to preferred embodiment, after pushing described bristle tuft, described bristle tuft of giving prominence to from the hole of described substrate at dorsal part is cut off.The tolerance of each bristle lengths is it often fully compensated thus, because can realize length coupling accurately by this casting die on positive side, is then cut off simply on dorsal part.

Described cutting away can by the instrument realization of cutting or still by the instrument particularly so-called hot cutter realization of heating.It achieves the contact between the instrument and each pieces of heat, and wherein the service life of cutting element is very high.

Described bristle tuft is fixed at dorsal part, such as, by hot melt and/or bonding and/or be placed in the plastic material of spray.Naturally also these fixing means at random can be combined mutually.

As mentioned above, the bristle be tucked in substrate preferably shifts to an earlier date by pre-rounding or preprocessing.

According to an embodiment, cut away period only radially by substrate and (if present) keep described bristle by guiding piece.Two ends are provided with the fixture of little side, and described end only reclines on such devices and is therefore axially fixed on side.

Being capped with the dorsal part of substrate of described bristle tuft.This such as can realize thus, makes brush body have a recess in the region of the pieces end of dorsal part, and its cover piece that is prefabricated by one or spray is closed.The another kind of the covering of bristle tuft on dorsal part may be, design the prefabricated cover piece that has molded jut, so-called sacrificial structure (Opferstrukturen) on its side towards described substrate, described jut hankers deliquescing in adding subsequently, particularly become fluid, so that subsequently relative to substrate or be more generally extruded relative to brush body.If substrate and brush body are two different parts, so natural brush body also can be provided with such sacrificial structure, so as its heating after be perhaps also connected by the substrate heated.This cover piece can be provided with arbitrary form away from clean jut, to be used as tongue formula cleaner.

To this as an alternative by substrate extruding encapsulating.If substrate does not have simultaneously on brush body but parts to be fixed on the remainder of brush body, so can when manufacturing brush body by substrate extruding encapsulating.The extruding encapsulating of substrate is still not limited to this modification.

A particularly advantageous embodiment of the present invention proposes, described bristle tuft is fixed without anchor pole at dorsal part, particularly by fusing and/or bonding, and the substrate of described assembling to be encased in the chamber of the half mould of an injection moulding tool by a bristle station subsequently and on this to abut in based on the hole in described chamber of attaching troops to a unit edge with its edge and described bristle tuft protrude in described hole.At dorsal part by the spray of brush portion section on described substrate, described brush portion section covers described bristle tuft.By present invention dramatically reduces for the manufacture of the cost required for loading plate, because described loading plate no longer moves to injection moulding tool from feather planting machine, injection moulding tool and the synchronous of feather planting machine no longer must intercouple forcibly thus.The bristle ends of bristle tuft fuses first mutually in the prior art, and this realizes usually in the orifice plate costly to be manufactured with bristle tuft.This orifice plate is sent in injection moulding tool subsequently, so that by pieces extruding encapsulating.Substrate with bristle is always sent in injection moulding tool together with loading plate in the prior art or is sent in another station of injection moulding tool.This loading plate is used for when the injection moulding of brush body (head and handle) relative to the support of expulsion pressure.But the present invention proposes, and is no longer provided with the loading plate being provided with the pore-forming of brush as the gripper shoe in injection moulding tool when the manufacture of brush body.In the half mould of injection moulding tool, in the region in the chamber released, be in contrast provided with in the method according to the invention and in a device in accordance with the invention a hole (preferably unique hole), described multiple bristle tuft protrudes in described hole.Described substrate only or almost only with its around edge to abut in from the edge in hole out, described chamber and to be preferably only supported on this edge.

This substrate is maintained in chamber on edge side.

According to preferred embodiment described substrate with its border seal around ground abut in hole same close around edge on, thus realize sealing function.

By method according to the present invention (its aperture plate no longer circulates between feather planting machine and injection moulding tool), whole manufacture and whole device are just enough by significantly less orifice plate.

Now also possible that, the substrate with bristle is stored in apparatus for temporary storage or buffer storage.Therefore no longer cause the stopping of another machine corresponding during maintenance work on injection moulding tool or feather planting machine, this significantly improves flexibility generally speaking.

Preferably in the half mould of device according to the present invention, there is multiple chamber, to improve the release rate of whole device.

The half mould with at least one chamber also can be formed on (and this is preferably) multi-piece type ground.The first and second moulded parts can be used, if necessary also have the other moulded parts with particularly multiple chamber of being arranged side by side or serial chamber.This chamber being attached to brush is so divided into multiple sections, such as, portion's section in the first moulded parts and portion's section in the second moulded parts.The mutual transition in these chambeies and form the whole chamber of half mould.This first moulded parts but be separable with the second moulded parts and be perhaps used as the one or more means of transportation or the release instrument that are located at substrate wherein.First first moulded parts is equipped with the substrate with bristle independent of the second moulded parts and is only coupled to the second moulded parts subsequently thus, that is directly before injection moulding.But because can manufacture very simply owing to lacking hole pattern first moulded parts, so can relatively inexpensively manufacture and apply many first moulded parts, this significantly improves cycle time and the flexibility of whole device.

But also impossible, each half mould single type is formed.So brush body to be presented in half mould and from wherein taking out after spray.

Must emphasize, according to preferred embodiment may spray so-called brush body in injection moulding tool, it can single component or many components ground be formed.A part for this brush body normally brush handle, brush neck and brush.Other parts of brush are formed by substrate.

But also have an embodiment to be favourable, particularly in the brush of cheapness, wherein said substrate self has almost had the handle of whole head and whole handle or brush substantially.This substrate so naturally also forms brush portion section and at least also or in inactive region is extruded encapsulating in the head zone of dorsal part subsequently by addition bristle.

Several in hole in substrate can be kept without pieces and are closed by spray.Different bristle tuft can be realized thus arrange in identical substrate.Alternative or be additional to without pieces opening close by (it the has random cross-sectional shape) spray of resilient profile piece or can be fixed in hole.These profile piece are not bristle but have the profile piece of the other pattern being less than or greater than common bristle.These parts such as also can have the shape of cross section being different from circle.Particularly such profile piece is used, to cause the effect of gum massage.

Above-mentioned another close without pieces hole may be the spray of plastics at dorsal part.Can or only close without the hole of pieces at this, or can positive side while together spray away from profile piece.The guiding piece of this positive side can be used as injection model at this.

Bristle tuft is lateral to bristle longitudinal direction and is separated from described bristle storage and is particularly individually moved towards described hole by conveyer.Known transmission tubule is not used in the prior art for conveyer yet, these transmit tubules submerge depository along bristle longitudinal direction in and held by itself and clamp the pieces of bristle.High cycle time can being realized on the one hand by the taking-up of side and on the other hand pieces significantly less or not may be pressed together, which improving the location when being moved in hole.

Also combine brush especially according to method of the present invention to be used, wherein except at least one soft flexible element be preferably made up of TPE of bristle tuft and brush away from and by spray on described brush.On the edge that this soft flexible element can be positioned at brush and away from also or be located in area of bristles, that is by bristle tuft around.This soft flexible element such as has such function, namely realizes gingival massage when brushing teeth.

Be transitioned into from handle to the soft portion's section of on the connecting portion of head and/or be even transitioned into handle this soft flexible element such as single type, thus in this section, realize the elasticity of flexure or fixing feel of sliding.

The present invention also provides a kind of device, particularly so-called brush-making machine for the manufacture of brush in addition, and it preferably utilizes above-mentioned according to method of the present invention.Described device comprises the Storage Box that has bristle storage place, and wherein bristle is settled by parallel packing; A withdrawing device for bristle tuft, bristle tuft is lateral to its longitudinal extension part and sequentially takes out from described bristle storage by described withdrawing device; One for each bristle tuft being sent to the conveyer at filling station, wherein said filling station has the keeper of substrate to be used for brushing; One has the guided plate turning to passage, by the described hole turning to bristle tuft described in passage to be pushed in substrate between described conveyer and the dorsal part of substrate be transferred; And described bristle tuft is sequentially pushed into mechanism in substrate by dorsal part through described guided plate.

Turn to the aforesaid modification of the formation of passage naturally also can realize in a device in accordance with the invention, and ground realization individually or can be combined.

Described device particularly comprise one closed around storing apparatus, such as one hold platform, chain, index platform (Indextisch) or more generally a kind of circle with accommodation section for substrate, on described circle, this substrate is moved, so that by each station, such as, for the station at the station and fixing pieces of cutting away bristle tuft and if desired for the station at the station or spray brush body that are enclosed in the brush body that dorsal part is opened.

Preferably described withdrawing device is integrated in conveyer.

Another kind may be, conveyer by pieces linearly or the track of curve shape move to filling station.So-called pieces receiver is like this shown in document EP0972465B1.

Also preferably include a pieces receiver according to device of the present invention, pieces is sequentially sent to final position by it, is axially shifted onto in hole to be filled by pieces described in this position.Therefore save and be delivered on another device or support after separating bristle tuft, pieces directly caused on described position by another device described before pushing.

In addition a station is also comprised according to device of the present invention, described substrate for sequentially pushing in described station is at least moved along both direction, to be aimed at bristle tuft described to be pushed opening to be filled, wherein this station particularly has the industrial robot for programmable, the preferred diaxon of the freedom of mobile substrate.

Preferred embodiment propose, a topping machanism is integrated in described device, cut away the bristle given prominence to from substrate at dorsal part by means of described topping machanism.Described topping machanism especially unsupportedly moves transverse to bristle.Cut away by bristle at dorsal part by the loading plate of a device side is used as corresponding cutter in the prior art, described pieces is through described loading plate.This plate makes bristle stablize, and a cutter moves along the surface at this plate, and described cutter cuts away described pieces.Although such cutting allows, cause the wearing and tearing of topping machanism and therefore compared to the more difficult maintenance of device according to the present invention and more difficult replacement spare part, wherein on instrument, be not provided with loading plate.

As at this emphasize, this unsupported cutting easily realizes preferably by heatable instrument, wherein said hot tool contact bristle and being cut away.

The thermometal line that this heatable instrument particularly flows through with an electric current is formed, and it can be circle line or lenticular wire, wherein in test achieves extraordinary effect by lenticular wire.

For in the fixed station of bristle tuft, described bristle is by bundle ground or always be welded to each other and/or bond and/or pour into a mould.

The guiding piece (it can be transported to the positive side of substrate) of device side continues mobile together with substrate from CFS to CFS and locates described pieces.

In order to make the locality specific of the end of the rear side of bristle, particularly when having the brush surface of type exterior feature, described device has a transmissible casting die with type exterior feature, and it is contact brush pieces during clogging or afterwards.A corresponding casting die can be moved relative to pieces by dorsal part.

Accompanying drawing explanation

Other feature and advantage of the present invention can obtain from explanation subsequently and the accompanying drawing be referenced subsequently.Wherein:

Fig. 1 a to 1h is the continuous print step according to method of the present invention, and described step is implemented in a device in accordance with the invention;

Fig. 2 is the top view of the signal according to a station of the present invention, wherein bristle tuft is taken out from a Storage Box;

Fig. 3 is the stereogram at the station according to Fig. 2 with several parts omitted;

Fig. 4 is the detail view of the amplification of Fig. 3;

Fig. 5 is the sectional view at the described station according to Fig. 3;

Fig. 6 is the stereogram of the signal at another station according to device of the present invention, and wherein bristle is cut off;

Fig. 7 is the detail cross-sectional view at the station of Fig. 6;

Fig. 8 a to 8c be have another cutter according to the continuous print step in the station of Fig. 6;

Fig. 9 is the top view of the signal according to device of the present invention;

Figure 10 is the stereogram of the injection moulding tool of a part as device according to the present invention;

Figure 11 is the top view of the moulded parts of injection moulding tool according to Figure 10;

Figure 12 is the top view of the substrate with bristle, and described substrate is inserted in the moulded parts according to Figure 11;

Figure 13 is the upward view being provided with the moulded parts of substrate according to Figure 12;

Figure 14 is the embodiment of an alternative for Figure 11, wherein supports protrusion and additionally protrudes in the hole of moulded parts;

Figure 15 is the top perspective view without the toothbrush of bristle according to another embodiment, and described toothbrush has a soft flexible element.

Figure 16 is the rear perspective view of the toothbrush of Figure 15 under the state with bristle;

Figure 17 is a rear perspective view compared to the modification revised a little according to the toothbrush of Figure 16; And

Figure 18 is the modification according to device of the present invention.

Detailed description of the invention

Figure 1 illustrates the multiple continuous print steps for the manufacture of brush, this brush has the form of toothbrush at this.Described brushing tool has the brush body 10 with brush, and it forms substrate 12 hereinafter.Substrate 12 has multiple through hole 14, and it is filled with bristle tuft 16, and described bristle tuft is fixed on substrate 12.

Can see in FIG, conveyer 18(also will illustrate it hereinafter further) transmit each bristle tuft 16, they are pushed into hole 14 from the dorsal part of substrate 12 by a device of conveyer 18.

Conveyer 18 has accommodation hole 22 for this reason, and it is filled with bristle tuft 16 and moves towards substrate 12.Device 20 comprises one can linearly moving push rod 24, and it is axially inserted proximally in accommodation hole 22, bristle tuft 16 to be pushed in the hole 14 aimed at accommodation hole 22 of substrate 12.Described substrate moves along two axis and aims at bristle tuft 16 to be pushed with hole 14 to be filled.

Guided plate 17 abuts on the dorsal part of substrate 12, and conveyer 18 abuts in again on guided plate 17.Guided plate 17 is the assembly at corresponding filling station and is automatically placed on it after the substrate 12 that conveying is to be stuffed.

Guided plate has multiple passage, and it respectively has an entrance at dorsal part (towards conveyer 18) and have an outlet at positive side (towards substrate 12).It is directed that multiple edges exactly in passage push direction (moving direction of push rod 24).Several passage but be configured to turn to passage 19, its by the pieces be pushed into wherein perpendicular to pushing direction mobile.

Preferably all entrances 21 have identical geometry and size, particularly circular shape.

Show in fig 1 a and turn to passage 19, it tiltedly overlaps the to each other trend, has the outlet 23 of two entrances separated 21 and two almost transition mutually.Outlet 23 is attached to a common hole 14, and is equipped with two pieces by the excessive hole of 19 1, passage that turns to of two overlapped orientations, and described two pieces integrally turn to a common pieces subsequently.Alternative is in the embodiment illustrated, axis adjacent is filled in excessive hole 14 in substrate 12 towards the passage 19 that turns to of its trend along the passage of launch direction orientation sideling with one.

The geometry in described excessive hole 14 is arbitrary, can be provided with polygonal or circular hole, microscler hole 14 as requested.

Hole 14 is all along launch direction or direction parallel with it trend in fig 1 a, can also be provided with the hole 14 tilting with launch direction, wherein turn to passage 19 to aim at it according to the cross section of amplifying.This tilting hole 14 allows tilting pieces 16 to be placed in substrate 12.

Another modification is, entrance 21 and outlet 23 have different geometries, and such as several outlet 23 has an oval or polygonal geometry, and wherein cross section can be identical with entrance 21.Turning to the bristle of therefore pieces in passage 19 reciprocally to move perpendicular to launch direction accordingly, to produce new pieces shape of cross section, it is corresponding to the shape of cross section in the hole 14 of attaching troops to a unit.Passage in guided plate 17 is particularly corroded by wire or spark erosion manufacture.Guided plate is hardened to 50 to 60 HRCs subsequently.

As appreciable in fig 1 a, the positive side of substrate 12 is provided with the guiding piece 26 of device side, preferably with the positive side contacts of substrate 12, its through hole 28 is aimed at hole 14 to be equipped.

Stop part 30 and guiding piece 26 away from.Bristle tuft 16 is so pushed in guided plate 17 deeply, in the guiding piece 26 of the dorsal part of substrate 12 and substrate 12 that is the dorsal part of brush 10, makes bristle tuft give prominence to and be pushed relative to stop part 30 from guiding piece 16 in positive side again.

Once all holes 14 to be equipped are provided with bristle tuft 16, so achieve the state of equipping completely in Figure 1b.Guided plate 17 or upwards can be removed before realizing the state illustrated in Figure 1b subsequently again.

Guiding piece 26 can be configured to the clamping device for pieces 16, such as additional perpendicular to pushing the moveable clamping element in direction by one, pieces 16 is guided extruding in side along it or has a cross section so large compared to the pieces be pushed into wherein by through hole 28 by it, makes pieces 16 be arranged in described through hole 28 with press-fit.

Must emphasize, must fill with bristle tuft 16 according to the not all hole 14 of the embodiment of brush 10.In order to the modification of the pieces mould and other geometry that realize bristle is it is possible that equip bristle tuft 16 selectively to different holes 14.

In the next method step illustrated in figure 1 c, removing stop part 30.Instead casting die 32 is axially up moved towards bristle tuft 16 from positive side, thus casting die contacts all bristle tuft 16.The upside of casting die 32 has type exterior feature, to form complementary brush finish (being formed by the end of the front side of bristle tuft 16).

By casting die 32, partly upwardly bristle tuft 16 and described bristle tuft are given prominence to relative to substrate 12 in downside unevenly again.

Selectively be provided with on this dorsal part one with the corresponding casting die 36 of casting die complementation, thus bristle tuft 16 can axially as far as possible seamlessly be fixed between casting die 32 with corresponding casting die 36.

In order to realize the tolerance compensating of the different length based on each bristle, can consider, or flexiblely or elastic bearing ground design casting die 32,36 in one of.

End based on the front side of casting die 32 bristle tuft 16 has the orientation accurately to substrate 12.

Next step (it also will be described more clearly hereinafter) dorsal part relative to substrate 12 away from bristle tuft 16 be cut off (Fig. 1 d), thus produce free end nearly on substrate 12.

Next method step (it can be performed in station then), at dorsal part stationary brush pieces 16.This is fixing such as by welding realization.

The one of welding may shown in Fig. 1 e, is wherein extruded facing to bristle tuft 16 by a hot plate 38.The end of the rear side of the bristle be made up of thermoplastic fuses mutually, preferably forms through layer 40(see Fig. 1 f).During this fixation procedure and also during aforesaid working angles, casting die 32 preferably remains in bristle tuft 16.Casting die 32 can be removed (Fig. 1 g) now, and is applied on the dorsal part of substrate 12, at least in the region of the end be welded to each other of bristle tuft 16 with the casting die 40 of posterior dorsal.This casting die 40 can be a prefabricated part.As an alternative also can by spray to substrate 12 or brush body manufactures casting die 40 to this.And can certainly the sacrificial structure of application of aforementioned in cap or the application on brush body.

Preferably (being interpreted as without limitation) during aforesaid method step remains on substrate 12 by guiding piece 26, for use in support and sealing.

Each step in the method step of just having illustrated above hereinafter also will illustrate in greater detail further and describe.

Therefore Fig. 2 shows the further details of the possible embodiment at the station according to device of the present invention, and wherein bristle tuft 16 is separated and is sent to substrate 12.This device has one with the station of self of Storage Box 42 for this reason, is mounted with bristle storage place 44 in described Storage Box.

Bristle is directed abreast and do not settle group by group in Storage Box 42.They are extruded towards conveyer 18 by the pressing mechanism of coupling.

Be interpreted as in unrestriced embodiment equally current, conveyer 18 comprises a withdrawing device 48 swung around swinging axle 46, it has the bundle receiver of a plate shape, so-called in the illustrated embodiment circular arc, and it has an accommodation hole 50 for bristle tuft 16.Accommodation hole 50 is opened on the side towards bristle storage place 44.If described bundle receiver swings to the right about Fig. 2, so accommodation hole 50 contacts with bristle storage place 44.Be expressed in accommodation hole 50 based on pretension multiple bristle like this of bristle storage place 44 towards the direction of this accommodation hole 50, this accommodation hole is completely filled.

Separately therefore realizing in the side of the longitudinal extension part of bristle of bristle tuft 16, bristle is in this case perpendicular to plan.If accommodation hole 50 is filled with bristle, so accommodation hole is deasil swung and is moved to position shown in figure 2.Guided plate 52(its be matched with the shape of plate 48) for not having pieces can drop out from accommodation hole 50.

Alternative also can realize rectilinear movement in the curved track that conveyer 18 has in said embodiment.

Loading plate or the middle ground that connects like this is not directly had directly to be pushed in substrate 12 via guided plate 17 by described conveyer 18 bristle tuft 16.Must be noted that, each bristle tuft is sequentially removed from Storage Box 42 and was transmitted before pushing by pieces receiver until its final position.Avoid at this and be delivered to middle bogey.

But because substrate 12 has multiple hole 14, they must in turn be filled with bristle tuft 16, and described substrate 12 is moved along both direction X, Y.Therefore hole 14 to be filled towards accommodation hole 50 and next one bristle tuft 16 to be pushed directed.

Corresponding station preferably has so-called X-Y slide block, and substrate 12 is fixed thereon and can be moved in one plane.So-called X-Y slide block be the positioner of programmable at least 2 axles of freedom, the simple embodiment of the especially industrial robot of programmable 2 axles of freedom.

Fig. 3 shows the stereogram of the Storage Box 42 with bristle storage place 44.Except guided plate 17, in order to illustrating of whole station omits multiple parts.

Fig. 3 also show a bristle tuft 16, and it is just in time pushed into by device 20 in the hole of substrate 12.Guiding piece 26 is located and is fixed on directed element by keeper 54, such as, on an X-Y slide block, realizes the orientation of substrate 12 to accommodation hole 50 by described X-Y slide block.

Fig. 4 shows, and bristle tuft 16 is outstanding in positive side from guiding piece 26 after the hole 14 being pushed into substrate 12.But bristle tuft 16 is also protruded relative to substrate 12 at dorsal part, or directly after pushing or after casting die 32 moves up.

Entrance 21 particularly has the cross section identical with accommodation hole 50.

In contrast to Fig. 1 a, one can be had without the gap 60(guided between the rear side of guided plate 17 and conveyer 18 see Fig. 4).Perhaps can provide at this, entrance 21 is designed to slightly larger than accommodation hole 50, because pieces 16 can disperse a little on its free end.

In addition usually advantageously, entrance 21 is expanded to infundibulate a little towards dorsal part.

In order to import bristle tuft 16 simply, hole 14 is preferably provided with the chamfering 62 of expansion at dorsal part.

And can see in Figure 5, substrate 12 has a recess 64 at dorsal part in the region in hole 14.Cover piece 14 is introduced or spray in this recess 64.

Conveyer 18 so designs, and makes only to apply the axial compressive force pressure of bristle longitudinal direction (that is along) during bristle is pushed into hole 14 by conveyer 18 in bristle tuft to be introduced.This means, the wall around accommodation hole 50 is rigidity, does not have radial clamping force to be applied on bristle.Unique clamping force is realized by the pretension in bristle storage place 44, and described pretension can be said when bristle separates and be continued to be directed in accommodation hole 50.

Fig. 5 also also show another modification turning to passage.Flock together at this multiple passage 19 and passage along launch direction orientation placed therebetween of turning in guided plate 17, there is the common of a common outlet 23 turn to passage 19 ' integrally to turn to one.Outlet 23 has a shape for the formation of the elongation of the pieces 16 of a common plate shape.Outlet 23 preferably has a cross section, and doubly, wherein X equals the quantity of the pieces 12 flowing to described common hole 14 to its X corresponding to accommodation hole 50.

Cutting away of bristle tuft 16 preferably realizes in self a station according to the present invention, and preferably by means of the instrument of a heating.

Fig. 6 shows the embodiment of the instrument 70 of such heating, and described instrument comprises the wire of the heat that an electric current flows through.This wire is arranged essentially parallel to the dorsal part of substrate 12, as far as possible nearly moves along substrate 12 and outstanding bristle ends is separated.Bristle also partly can be fused mutually at this.

Fig. 7 shows the heat effect of the bristle tuft 16 of not yet cutting away, and described bristle tuft fuses mutually.In addition, also the separated end of the bristle tuft 16 retained in substrate 12 can be fused, but this is for locating and being fixedly favourable.

Show the substantially circular wire of cross section in figs. 6 and 7 as instrument 70, and the embodiment with so-called flat alternative wiry can be seen in Fig. 8 a to 8c.The wire blade of the heating that this same electric current flows through tilting relative to bristle to be separated.

Can see in Fig. 5 to 8, bristle tuft 16 is not supported in side in the region of its cutting point yet.Instrument 70 is not supported in the region of substrate 12 yet, thus does not occur wearing and tearing when cutting.This cutting can be said and to realize without supporter.

Bristle tuft 16 or in side only by substrate 12(see Fig. 8 a to 8c) or to keep by substrate 12 with by guiding piece 26.If yet there is guided plate 17 when cutting away, so this contributes to supporting.If replace cutting with being cut with the instrument of heating, so guided plate 17 also can be configured to corresponding cutter.In axial direction bristle tuft 16 is positioned between casting die 32 with corresponding casting die 36.This location should also be guaranteed during cutting, but this cannot be understood to restriction.

End in order to avoid the separation of bristle tuft 16 is fallen on substrate 12, and this cutting is carried out downwards (see such as Fig. 8) preferably by head that is with dorsal part.The end 72 be separated thus is simply to whereabouts.

Bristle tuft 16 on substrate 12 fixing as described in or by weld and/or by bonding and/or such as being realized during generation cover piece 40 by cast.Cover piece 40 can particularly dorsal part have away from clean protuberance 80 for the formation of tongue formula cleaner.Can be pressed into or bond the cover piece 40 of conveying as an alternative afterwards, also use aforesaid sacrificial structure.

Not all hole 14 must be closed by bristle tuft 16.Also can as start mentioned as described in one or another hole 14 retain and do not fill.So corresponding hole 14 is closed when bonding subsequently or cast or rear spray.

In addition also possible that, several hole is equipped with flexible profile piece 82, as exemplarily shown in Figure 6.In substrate 12, corresponding hole 14 is in this profile piece corresponding to this integral type, and its cross section is significantly greater than a described bristle tuft 16.Profile piece 82 can be used as the massage protrusions of gum etc.Profile piece 82 can or prefabricated and be assembled to subsequently in hole or immediately by spray to hole or on hole.

Figure 9 illustrates for the device according to aforesaid method manufacture brush.This device is configured to the instrument such as with the platform 100 that rotates.Preferably outside tool stand 100, by withdrawing device 48 and conveyer 18, each bristle tuft 16 is individually moved to substrate 12(in this case brush body 10), wherein, described brush body is placed on guiding piece 26.The Storage Box with empty guiding piece 26 can exist and not shown at this for promoting clearness.

As already mentioned, clog in the hole 14 of attaching troops to a unit in dispatch station by each single bristle tuft 16, its method moves along X and Y-direction the guiding piece 26 kept in side.

This substrate 12 completing outfit is moved to workbench 100 subsequently and reclines thereon.The workbench 100 of this rotation transmits one or more substrate 12 to station, in described station, aim at pieces according to Fig. 1 c casting die and corresponding casting die 32,36.

Pieces is cut off by means of instrument 70 at dorsal part subsequently.Described cutting away can realize in back to back station or in following station, places casting die and corresponding casting die 32,36 in described station for the first time.

Subsequently bristle tuft 16 is fixed at dorsal part, such as, under heat effect.

Last spray cover piece 40.The brush completed is removed and such as stacked.Guiding piece 26 does not illustrate clearly to the transmission in first stop.

Must emphasize in this, replace molded on brush body 10 substrate 12 also can use the substrate of plate shape, the substrate of this plate shape is such as by extruding before encapsulating is fixed on brush body 10 by all stations.

An injection moulding tool shown in Figure 10 to 13, it can stand in the device for the manufacture of brush comprising multiple station as another and be employed.

This injection moulding tool illustrates with main basic structure in Fig. 10 and comprises lower half mould 140 and a upper half mould 142 of a multi-piece type, they have chamber separately, and described chamber is transition and form the cavity that is treated spray mutually under the closed state of instrument.Lower half mould 140 comprises at least two parts, that is the first moulded parts 144(its illustrate in greater detail in Figure 11 and 13) and the second moulded parts 146.Moulded parts 140,142 comprises multiple chamber 156 be arranged side by side.

First moulded parts 144 has a hole 148 in the region in each chamber 146, its bristle tuft 16 based on chamber 146 and for holding substrate 14.Edge 150(its in depth exist and be the part in chamber 146) around corresponding hole 148.This edge 150 is used as bearing-surface and the supporting surface of the substrate 12 with bristle.Except chamber, edge 150 146 yet has a neck section 152 as the transition between brush and brush handle.

This neck section (as shown in Figure 10) is transitioned into the restriction in the chamber in the second moulded parts 146 or holds in portion's section 156 of handle of brush.

According to be preferred embodiment provided with only one for holding the hole 148 of whole bristle tuft 16 of substrate 12.This makes the special low cost of manufacture of the first moulded parts 144.

Hole 148 or be configured to through hole or blind hole completely.Must guarantee in each case, hole 148 is enough dark, the end of the front side of bristle tuft 16 is not given prominence to from this hole and appears at an adjacent part as on the bottom in the gap 160 the second moulded parts 146 or on the bottom in the hole 148 of blind-hole type.Therefore bristle tuft 16 gives prominence to freely downwards.

The substrate 12 of encapsulating is not also extruded according to the head and the handle that preferred embodiment form brush at dorsal part.At this it is possible that there is the part that has bristle in head, it is extruded encapsulating when forming handle subsequently.According to preferred embodiment but head and handle are single types, and head has the hole 14 for holding bristle tuft 16.

The substrate 12 such as with bristle to get loose with guiding piece 26 according to the method step manufacture of Fig. 1 a to 1g in method step subsequently.The substrate 12 that guiding piece 26 so there is no together with having bristle moves to injection molding station.

The substrate 12 with bristle is subsequently or mechanically or by being manually sent to the first moulded parts 144 and being inserted into there in hole 148, or the centre place of keeping in is arranged between bristle station and injection molding station, the substrate 12 with bristle is temporarily stored in this temporary place.

Substrate 12 is located in chamber 146,156 after being inserted in injection moulding tool.Go up half mould 142 to be subsequently moved downward, so that closed injection moulding tool.

The substrate 12 of insertion can being seen in fig. 12, being wherein only cut off in neck region in the mode illustrated with drawing for simplifying substrate 12.

Also the bristle tuft 16 be welded to each other at dorsal part is shown in fig. 12.Substrate 12 has the recess of slot type at dorsal part, and it is full of by liquid plastics when closed injection moulding tool.

The brush of plastic-enclosed on dorsal part of spray.In addition can in the method step or the portion's section also extruding encapsulating or spray such as handle in other method step with second component.As illustrated, substrate 12 also can only be made up of a part for brush or brush, and the subregion that spray is subsequently other in injection moulding tool.

When spray, substrate 12 is only supported on the edge in hole 148.And bristle tuft 16 is not supported.Which strongly simplifies injection moulding tool.According to preferred embodiment substrate 12 with its border seal around ground abut in hole 148 same close around edge 150 on, thus realize sealing function.

There is the first moulded parts 144 of brush body from injection moulding tool taking-up and or be sent to another injection molding station or be transported to a storage as the brush completed after opening injection moulding tool.

Because the orifice plate not being provided with the substrate 12 with bristle transports substrate 12 from bristle station to injection molding station, so these two stations or machine work separated from each other.The parking that can not cause another machine down time of a described machine.

To this as an alternative according to Figure 14 also possible that based on hole 148 a bottom or based on the second moulded parts 140 in the region in space 160 upward to hole in be provided with outstanding support protrusion 170 along the direction of substrate 12.This support protrusion 170 is straight lines or as shown leads to substrate 12, can move between the bristles to the bearing position of point and preferred conical.Even if but to there is not on top edge 150 support member of bridge-type out in this embodiment yet, it moves towards and for supporting between bristle tuft 16.

As in other all embodiments, hole 148 is so big, make all or at least multiple bristle tuft 16 protrude into described jointly or in a common hole.

Toothbrush constructed in accordance according in the embodiment of Figure 15 to 17 except bristle tuft 16 is yet provided with one or more soft flexible element 180 for cleaning teeth and the massage for gum on brush.This soft flexible with brush away from element 180 however do not clogged but be injected on substrate 12, be preferably injected on substrate before filling.Element 180 extends forward on bristle tuft 16 side and away from substrate 12.

On the edge that this soft flexible element 180 can be positioned at brush and away from also or be located at (see Figure 15) in area of bristles, that is by bristle tuft 16 around.

Brush body 10 is manufactured to multimember moulding, and one of them component forms this soft flexible element 180 individually or by portion's section.Extending until in handle according to the material of element 180 in the embodiment of Figure 15 and 16, form the handle dorsal part that a soft gripping is more steady there.In the join domain 182 from handle to head, this soft material forms larger portion's section and for the elastomeric joint of a type.

Not there is according to the modification of Figure 17 the transition of the single type of the soft flexible element 180 of handle or join domain 182.Portion's section that this is formed by TFE material must therefore by independently spray point by spray.

Be illustrated with also untight form according to the rear portion of head in the embodiment of Figure 15 to 17.Also head must to be closed at its dorsal part after filling at this, such as, pass through spray or a welding or bonding of covering of another component.

This soft flexible element is particularly made up of thermoplastic elastomer body (TPE).

The modification with soft flexible element must not be limited to the manufacturing method and apparatus with guided plate, as shown in figure 18.Also possible that, guided plate 17 ground is not had to manufacture toothbrush.The method does not have and turns to guided plate 17 ground of passage 19 to form in this case, particularly wherein for carrying the conveyer 18 of bristle tuft 16 and the hole in substrate 12 that is in portion's section of the movement of conveyer 18 and the gap 184 that exists between the dorsal part of substrate 12 without guiding, being pushed in substrate 12 by without guiding by described gap bristle tuft 16.

Therefore corresponding device according to the present invention is not provided with guided plate, but is provided with other above with the feature mentioned in the claims (individually or in combination).

Claims

1., for the method by means of a device manufacture brush (10), it is characterized in that comprising the following steps:

Sequentially take out bristle tuft (16) from bristle storage (44), in storage place of described bristle, bristle is settled by parallel packing;

The bristle tuft (16) of taking out in turn directly is sent to separately the substrate (12) of a part for the brush that a formation completes by means of a conveyer (18), described substrate has the first hole (14) for holding each bristle tuft (16);

Sequentially described bristle tuft (16) is pushed into first hole (14) of attaching troops to a unit from the dorsal part of described substrate (12), between described conveyer (18) and the dorsal part of described substrate (12), be wherein provided with one there is the guided plate (17) turning to passage (19), by in described described first hole (14) turning to passage described bristle tuft (16) to be pushed in described substrate (12), and

Without anchor pole ground, described bristle tuft (16) is fixed on described substrate (12).

2. method according to claim 1, is characterized in that, is moved by described substrate (12) to sequentially push along both direction, to be aimed at bristle tuft to be pushed (16) in the first hole (14) to be filled.

3. method according to claim 2, is characterized in that, uses the positioner of an at least diaxon that can freely programme to move described substrate (12).

4. method according to claim 3, is characterized in that, uses an industrial robot that can freely programme to move described substrate (12).

5. method according to claim 4, is characterized in that, uses the industrial robot of a diaxon that can freely programme to move described substrate (12).

6. the method according to any one of claim 1-5, it is characterized in that, sequentially described bristle tuft (16) is transported until final position by a pieces receiver, be pushed into the first hole (14) to be filled from bristle tuft described in described final position.

7. the method according to any one of claim 1-5, is characterized in that, only applies axial compressive force in described bristle tuft (16) in described conveyer (18) during pushing.

8. the method according to any one of claim 1-5, it is characterized in that, the positive side of described substrate (12) has in the prelocalization one pushing described bristle tuft (16) guiding piece (26) of the device side of through hole (28), wherein said bristle tuft (16) is so inserted in described through hole (28) via described first hole (14), makes described bristle tuft outstanding in positive side.

9. method according to claim 8, it is characterized in that, described bristle tuft (16) is so inserted in described through hole (28) via described first hole (14), makes described bristle tuft outstanding in positive side from described guiding piece (26).

10. the method according to any one of claim 1-5, is characterized in that, guiding piece (26) is configured to the clamping device for pieces (16).

11. methods according to claim 10, it is characterized in that, described guiding piece (26) is configured to have so large cross section by through hole (28) compared to the pieces be pushed into wherein (16), makes described pieces (16) be arranged in described through hole (28) with press-fit.

12. methods according to any one of claim 1-5, it is characterized in that, the anterior end of pieces (16) is between the erecting stage of described substrate (12) or contact the casting die (32) that has type exterior feature afterwards, to complete the brush finish that has type exterior feature.

13. methods according to any one of claim 1-5, is characterized in that, after pushing described bristle tuft (16), pieces is outstanding and be cut off from described first hole (14) at dorsal part.

14. methods according to claim 13, is characterized in that, are cut off pushing and the instrument (70) by means of a heating outstanding from described first hole (14) at dorsal part of pieces after described bristle tuft (16).

15. methods according to any one of claim 1-5, is characterized in that, in order to fixing described bristle tuft (16) by described bristle tuft in dorsal part hot melt and/or bonding and/or end is placed in the plastic material of spray.

16. methods according to claim 1, it is characterized in that, described bristle tuft (16) is fixed without anchor pole at dorsal part, the substrate assembled (12) to be encased in the chamber of the half mould of an injection moulding tool by a bristle station and to abut in the edge of described substrate that edge (150) based on second hole (148) of the chamber of attaching troops to a unit (146) is upper and described bristle tuft (16) protrudes in described second hole (148) at this, and at dorsal part by the spray of brush portion section on described substrate (12), described brush portion section covers described bristle tuft (16).

17. methods according to claim 16, is characterized in that, described bristle tuft (16) are fixed without anchor pole at dorsal part by fusing and/or bonding.

18. methods according to claim 16, it is characterized in that, described substrate (12) in the region of described second hole (148) in spray time unsupportedly retain, or point or linear support protrusion (170) extrudes, to support when injection moulding relative to described substrate (12) between the bristles in described second hole (148).

19. methods according to any one of claim 16-18, it is characterized in that, described substrate (12) only abuts on injection mould with its edge when spray and/or the end of front side of described bristle tuft (16) is not axially supported in described injection mould.

20. methods according to any one of claim 16-18, is characterized in that, described substrate (12) Flagless ground is sent to injection moulding tool from bristle station.

21. methods according to any one of claim 1-5, it is characterized in that, describedly turn to passage (19) and described first hole (14) tiltedly to move towards and pieces (16) is tiltedly on the spot anchored in described substrate (12), and/or to be pushed in common the first hole (14) of in substrate (12) one to form a common pieces (16) in the passage multiple pieces (16) being pushed into the different overlapped trends be arranged side by side.

22. methods according to any one of claim 1-5, it is characterized in that, on the dorsal part that described guided plate (17) is placed to described substrate (12) and/or before the upper fixing pieces (16) of described substrate (12), leave described substrate.

23. methods according to any one of claim 1-5, is characterized in that, except described bristle tuft (16), at least one soft flexible element (180) and brush away from and by spray on described brush.

24. methods according to claim 23, is characterized in that, described soft flexible element (180) is made up of TPE.

25. methods according to any one of claim 1-5, is characterized in that, performing described method when not having guided plate (17) that turn to passage (19).

26. methods according to claim 25, it is characterized in that, performing described method when not having guided plate (17) that turn to passage (19), between the conveyer (18) for carrying bristle tuft (16) and the first hole (14) in described substrate (12), wherein having one without the gap (184) guided.

27. for by the device according to the method manufacture brush one of the claims Suo Shu, comprising:

A Storage Box (42) with bristle storage place (44), in storage place of described bristle, bristle is settled by parallel packing;

A withdrawing device for bristle tuft (16) (48), described withdrawing device is used for that bristle tuft (16) is lateral to its longitudinal extension part and takes out from described bristle storage (44),

It is characterized in that, described withdrawing device (48) is so formed, and makes sequentially to take out described bristle tuft (16) from described bristle storage (44);

One for being sent to the conveyer (18) at filling station by each bristle tuft (16);

One has the guided plate (17) turning to passage (19), by described the first hole (14) turning to bristle tuft described in passage (16) to be pushed in described substrate (12) between described conveyer (18) and the dorsal part of substrate (12) be transferred; With

Described bristle tuft (16) is sequentially pushed into mechanism in described substrate (12) by dorsal part through described guided plate (17).

28. devices according to claim 27, is characterized in that, described conveyer (18) by pieces (16) along a straight line or the track of Curved move to described filling station.

29. devices according to claim 27 or 28, is characterized in that, be provided with the fixed station for described bristle tuft (16), and in described fixed station, bristle is by bundle ground or always be welded to each other and/or bond and/or pour into a mould.

30. devices according to claim 27 or 28, it is characterized in that, be provided with the guiding piece (26) of a device side, described guiding piece can be transported to the positive side of described substrate (12) and pass through each station together with described substrate (12).

31. devices according to claim 27 or 28, it is characterized in that, describedly passage and described first hole (14) is turned to tiltedly to move towards and pieces (16) is tiltedly on the spot anchored in described substrate (12), and/or be provided with multiple overlappingly towards the passage that the first hole (14) that in described substrate (12) is common is moved towards, and/or be provided with at least one and turn to passage (19), the described passage that turns to holds multiple pieces (16), to make described multiple pieces be integrally a common pieces.

32. devices according to claim 31, it is characterized in that, the described passage (19) that turns to has multiple entrance (21) side by side, be integrally one by each passage of described entrance and common turned to passage (19 '), and/or at least one turns to passage (19) to have an entrance (21), described in the geometry of described entrance is different from, turn to the geometry of the outlet (23) of passage (19).