EP2832256A1 - Clapet de fermeture simplifié doté d'un filetage ou d'une fermeture à baïonnette et applicateur en une pièce ainsi équipé - Google Patents

Clapet de fermeture simplifié doté d'un filetage ou d'une fermeture à baïonnette et applicateur en une pièce ainsi équipé Download PDF

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Publication number
EP2832256A1
EP2832256A1 EP14178775.4A EP14178775A EP2832256A1 EP 2832256 A1 EP2832256 A1 EP 2832256A1 EP 14178775 A EP14178775 A EP 14178775A EP 2832256 A1 EP2832256 A1 EP 2832256A1
Authority
EP
European Patent Office
Prior art keywords
bristle
cap
applicator
bristles
carrying portion
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
Application number
EP14178775.4A
Other languages
German (de)
English (en)
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EP2832256B1 (fr
Inventor
Werner Fischer
Friedrich Weigel
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Geka GmbH
Original Assignee
Geka GmbH
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Filing date
Publication date
Application filed by Geka GmbH filed Critical Geka GmbH
Publication of EP2832256A1 publication Critical patent/EP2832256A1/fr
Application granted granted Critical
Publication of EP2832256B1 publication Critical patent/EP2832256B1/fr
Not-in-force legal-status Critical Current
Anticipated expiration legal-status Critical

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Classifications

    • A—HUMAN NECESSITIES
    • A45—HAND OR TRAVELLING ARTICLES
    • A45D—HAIRDRESSING OR SHAVING EQUIPMENT; EQUIPMENT FOR COSMETICS OR COSMETIC TREATMENTS, e.g. FOR MANICURING OR PEDICURING
    • A45D40/00—Casings or accessories specially adapted for storing or handling solid or pasty toiletry or cosmetic substances, e.g. shaving soaps or lipsticks
    • A45D40/26—Appliances specially adapted for applying pasty paint, e.g. using roller, using a ball
    • A45D40/262—Appliances specially adapted for applying pasty paint, e.g. using roller, using a ball using a brush or the like
    • A45D40/265—Appliances specially adapted for applying pasty paint, e.g. using roller, using a ball using a brush or the like connected to the cap of the container
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
    • B65D—CONTAINERS FOR STORAGE OR TRANSPORT OF ARTICLES OR MATERIALS, e.g. BAGS, BARRELS, BOTTLES, BOXES, CANS, CARTONS, CRATES, DRUMS, JARS, TANKS, HOPPERS, FORWARDING CONTAINERS; ACCESSORIES, CLOSURES, OR FITTINGS THEREFOR; PACKAGING ELEMENTS; PACKAGES
    • B65D41/00—Caps, e.g. crown caps or crown seals, i.e. members having parts arranged for engagement with the external periphery of a neck or wall defining a pouring opening or discharge aperture; Protective cap-like covers for closure members, e.g. decorative covers of metal foil or paper
    • B65D41/02—Caps or cap-like covers without lines of weakness, tearing strips, tags, or like opening or removal devices
    • A—HUMAN NECESSITIES
    • A46—BRUSHWARE
    • A46B—BRUSHES
    • A46B2200/00—Brushes characterized by their functions, uses or applications
    • A46B2200/10—For human or animal care
    • A46B2200/1046—Brush used for applying cosmetics
    • A46B2200/1053—Cosmetics applicator specifically for mascara

Definitions

  • the invention relates to a closure cap according to the preamble of claim 1, as well as a cosmetic applicator equipped therewith.
  • Such caps for cosmetic applicators which consist of a tubular cap body, the interior of which is divided by a plate into two areas on which a stem or shaft is attached, which in turn holds the actual applicator, are widely used in the cosmetics industry.
  • the plate is usually at the same time the task to form a sealing surface to be pressed with a completely closed cap against the bottleneck, or against the protruding edge of the scraper to seal the cosmetic reservoir reliably.
  • the cap body is generally provided on its inner peripheral surface with a thread profile which projects radially relatively far inwards into the free space enclosed by the cap body.
  • the thread profile forms a holding projection: With the help of this thread profile, the cap can be screwed onto a reservoir provided with a complementary thread groove until the plate rests with the pressure required for a secure seal against the front side of the container neck or this front side cross-scraper.
  • caps are used again and again, instead of an internal thread use an elastic Rastwulst, although also protrudes inward, but only so slightly that the cap with the help of the linear movement of a correspondingly strong ejector of which forms the locking mechanism Can be pushed down core, because it can stretch so far elastically that the locking bead from the recess of the mold that has been imaged can be pulled out.
  • Such locking closures often do not keep tight in the long term, since it is difficult to permanently apply relatively high forces with the aid of such a snap closure, which act in the direction of the longitudinal axis L and sufficiently bias the sealing surfaces against each other.
  • a plastic injection-molded cap is provided with a tubular cap body which has a longitudinal axis which in many cases (but not always) will at the same time be the axis of symmetry of the cap.
  • the cap body merges integrally into an at least predominantly radially extending plate.
  • the tubular cap body has on its inner circumference at least one retaining projection which, relative to the longitudinal axis of the tubular cap body, extends substantially radially inwardly into the free space bounded peripherally by the cap body and indeed more than only slightly - the retaining projection is normally part of one positive holding mechanism over which a more than insignificant holding force in the direction of the longitudinal axis of the cap or its associated container can be applied.
  • This holding mechanism is usually a thread or a bayonet closure, otherwise to another holding mechanism that locks so tightly form-fitting that the cap can not be unlocked by pure tensile forces in the direction of the longitudinal axis again.
  • the plate has a window associated with the at least one holding projection, which is aligned in the direction of the longitudinal axis of the closure cap with its associated holding projection. Through this window, viewed in the direction of the longitudinal axis between the retaining projection and the plate lying space of the side facing away from the retaining projection side of the plate is accessible.
  • the injection mold can then be designed so that its at least two parts for molding in the direction of the longitudinal axis L. can be moved apart and thus also the cap comes free.
  • the region in the closure cap which lies between the holding projection and the plate viewed along the longitudinal axis, and which actually constitutes a so-called undercut from the point of view of a mold maker does not have to be formed by the molding which is the holding projection facing, but can be formed by the molding, which faces away from the retaining projection and for this purpose has a projecting projection which projects through the window into the undercut between the retaining projection and the plate.
  • the invention is that the closure cap is provided with a tubular cap body having a longitudinal axis which integrally merges into a plate extending at least predominantly radially, wherein the tubular cap body has at least one holding projection on its inner circumference, the radially inwardly protrudes into the circumference bounded by the cap body interior (8) and thereby seen from the holding projection facing the front end of the tubular cap body forth forms an undercut, characterized in that the plate has a the at least one retaining projection associated window through which the front projection of the tubular cap body remote from the holding projection has access to the undercut, so that in the production of the end opening facing away from the holding projection, a shaped part is pushed into the region of the undercut can to fill this so that there is no undercut for the other part.
  • the window is designed so that the cross-sectional area of the window is larger than the projection surface of the associated retaining projection in the direction of the longitudinal axis.
  • This makes it possible for the projection projecting through the window to become thicker from its free end to its root, because it can be made e.g. B. tapered sideways or pyramid-shaped, which improves its sealing effect about.
  • the plate is positioned in the tubular cap body so as to divide it into two sections, each of which has the shape of a frontally open tube.
  • This improves handling especially in cosmetic applicators decisively because the part of the tubular cap body facing away from the plate forms a counterweight to the applicator, which is fastened to the plate via a shaft or stem, so that the center of gravity of the overall system is more in Direction of the center of the cap moves ("center" seen in relation to the longitudinal axis).
  • the plate transitions into a shaft which carries an applicator or which has a coupling for coupling a shaft carrying an applicator.
  • the invention further relates to a particularly rational to produce applicator with a handle, a handle and a bristle trim and a method for producing such an applicator.
  • Such a cosmetic applicator which is designed in particular as a mascara applicator, is provided with a closure cap designed on its outer side as a gripping surface.
  • the cap is used for sealing a cosmetic reservoir and is designed according to the invention by its plate has at least one window, which is aligned with the at least one holding projection in the direction of the longitudinal axis.
  • the cap merges integrally into a protruding shaft.
  • the stem forms a stem portion and integrally forms a bristle-carrying portion, i. H. the stem portion and the bristle-carrying portion merge seamlessly into one another and are designed as a one-piece component.
  • the bristle-carrying portion stands from the bristle-carrying portion of bristles, which are formed as an integral part of the bristle-carrying portion by being inextricably form-fitting and connected by welding to the bristle-carrying portion.
  • the bristle-carrying portion is hollow as such and carries injection-molded bristles which are integrally connected through the wall of the bristle-carrying portion with a plastic core lining the bristle-supporting portion.
  • the closure cap and the stem are preferably made of a different plastic material than the plastic core and the bristles. Ideally, these two plastic materials are chosen so that they weld together in the course of spraying the bristles.
  • the bristles, the stem and the cap thus form a one-piece component.
  • the inventive design of the cap is significantly contributed to the efficient production of the applicator according to the invention, since the molding of the integrally produced applicator is substantially simplified.
  • the applicator according to the invention is advantageous because there are nowhere montage facultye joints to him, could penetrate into the cosmetic mass to stay there permanently and then u.U. to form a stove for germs.
  • the first plastic mass that forms the bristles is made of a plastic that is more flexible in the cold state and / or a better "Bend recovery assets "has, as the plastic from which the second plastic composition, which preferably forms the cap and / or the shaft.
  • a particularly well-suited for providing the first plastic composition plastic is under the brand name "Grilflex” ® commercially available type of plastic.
  • Polypropylene (PP) is particularly suitable as the second plastic compound.
  • the bristles are integrally connected to a plastic core lining the bristle-carrying section and locally reach through the wall of the bristle-carrying section.
  • the second plastic material which forms the bristles and the bristle-carrying portion inside filling plastic material, and the tubular, bristle-carrying portion.
  • bacteria or fungi could settle.
  • the cosmetic applicator is configured such that the cavity of the bristle-carrying portion is open on the end side facing away from the cap of the bristle-carrying portion to the outside.
  • the plastic mass which is the wall of the bristle-carrying portion locally break through and form the bristles, inject very well without bubbles.
  • the bristle-carrying portion is designed to have an at least substantially constant wall thickness, ideally ⁇ 1 mm, and more preferably ⁇ 0.75 mm.
  • the handle portion is at least partially hollow and in its interior has a separating portion which pressure-tightly separates its cavity from the cavity of the bristle-carrying portion, such that even under the influence of a several hundred bar amounting injection pressure no breakthrough takes place ,
  • the handle portion is solid at its end facing away from the handle and thus forms a separating portion, which accounts for about 1/5 to 1/2 of the total length of the handle portion and ensures a reliable seal.
  • the stem portion seals reliably even when the cycle times are kept relatively short and the stalk portion injected together with the cap in a first step at the time in which the bristles are injected in a second step, is not fully cooled ,
  • a particularly reliable and stable construction results when the wall thickness of the bristle-carrying portion increases immediately before the transition of the bristle-carrying portion in the stem portion.
  • the shaft is continuous inside hollow and in the course of production forms a channel through which the injected into the interior of the bristle carrier portion for the purpose of producing the bristles plastic mass into the region of the cap, preferably into the region of the outer circumference of the cap, can flow.
  • a special embodiment of the cap can be achieved particularly efficiently, namely in one operation with the injection of the bristles, preferably in the area from the handle surface.
  • the gripping surface of the cap is hereby provided with one or more surface areas consisting of the material of the bristles (compared to the common plastic material of the cap and the stem portion) and therefore improves the feel of the gripping surface - for example by making the gripping surface grippier and not so easily accidentally slips out of hand, for example, because the applicator is still handled after showering wet / clammy fingers.
  • the ratio AB / AS is preferably ⁇ 0.8, and ideally ⁇ 0.7. In this way it is reliably prevented that the bristle stock overloads when passing through the scraper and therefore sooner or later damaged.
  • the first plastic mass that forms the bristles consists of a plastic that is more flexible in the cold state and / or a better "Bend recovery assets "has, as the plastic from which the second plastic composition, which preferably forms the cap and / or the shaft.
  • a particularly well-suited for providing the first plastic composition plastic is under the brand name "Grilflex” ® commercially available type of plastic.
  • Polypropylene (PP) is particularly suitable as the second plastic compound.
  • this applicator is very efficient to manufacture, because it consists of a single piece, including the bristles.
  • the stem portion at its end facing away from the handle is solid and thus forms a separation section, which is about 1/5 to 1/2 of the total length of Stem section makes.
  • the mold which is wrapped in a second injection molding step around the stabilizing core to overmold it with the second plastic mass forming the sleeve from which the bristles protrude, can be applied with the pressure required for to ensure a reliable seal.
  • injection molding in one step in the sense of this alternative solution is understood to mean any production that can take place within one and the same injection mold without first spraying a blank, which is then completely or partially shaped to continue the injection molding process in another mold arrangement.
  • cap, plate stem and bristles achieves unexpectedly good results, if one uses a comparison with the injection of fine bristles usually used injection pressure a significantly increased injection pressure, such as at least 900 bar or better still at least 1200 bar.
  • the outer diameter of the stem portion is substantially or consistently larger than the outer diameter of the bristle-carrying portion, wherein the ratio is preferably ⁇ 0.8, and ideally ⁇ 0.7.
  • the outer diameter of the stem portion is reduced at the transition to the bristle-carrying portion relative to the otherwise encountered outside diameter of the stem portion.
  • one or more holding projections on the closure cap which are designed such that they form an applicator quick closure in cooperation with one or more holding projections on the container side, designed as a bayonet closure or preferably as a multi-start short thread is and which is designed so that the holding elements with a rotary motion ⁇ a 3/8 turn and better still with a rotational movement ⁇ a 1/4 turn from a fully closed position can be transferred to a no longer fixed in the direction of the applicator longitudinal axis position.
  • the short thread is formed as a coarse thread with a pitch angle ⁇ of preferably more than 5 °.
  • ⁇ preferably more than 5 °.
  • the plate has an opening which connects the cavity of the stem portion with the adjoining, circumferentially bounded by the cap cavity. This is because a consistently solid stem has proved to be unsuitable because of the high material consumption and the long cooling times.
  • Such a click-and-close closure is evidently part of the Fig. 1 a plurality of container-side retaining projections 5.
  • the retaining projections 5 are in radially outward direction from the container neck and have in the circumferential direction only a local extent, the radian measure B is preferably less than 1/10 and ideally less than 1/15 of a full circle.
  • the container-side holding projections 5 have no thread pitch. However, they are preferably at least on the side on which they interact with the corresponding holding projections of the closure cap, spherical or convex. This makes it easier to lock in and out.
  • the cap 2 which usually forms a gripping surface on its outer side, is evidently the Fig. 2 for a substantial part of a tubular cap body 3, which surrounds an interior 8, ie circumferentially bounded, while the front side each has a free cross-section.
  • the tubular cap body 3 on its inside two cap-side retaining projections 6, which form another part of the click-and-close closure.
  • the holding projections 6 are expediently mounted remotely from the lower end edge of the cap body, so that the lower edge of the cap body forms an apron which substantially obscures the direct view of the holding projections.
  • the closure cap-side retaining projections 6 protrude in a radially inward direction into the interior 8 enclosed by the cap body 3. Similar to the container-side holding projections 5, the closure cap-side holding projections 6 have only a local extent in the circumferential direction, the radians of which are preferably less than 1/10 and ideally less than 1/15 of a full circle. In this embodiment, the cap-side holding projections 6 have no thread pitch.
  • the retaining projections 5 and 6 are coordinated in this embodiment so that each of the cap-side holding projections 6 engages the currently associated container-side retaining projection 5 and preferably latched with a form-fitting, as soon as the closed position is completely reached, see. Fig. 3 that illustrates the principle addressed.
  • the Fig. 5 shows what problem arises when one tries to produce such a cap 2 for such a click-and-close closure with the means of the prior art in one piece, instead of producing them from two subsequently assembled to each other items.
  • the one-piece cap 2 with its tubular cap body 3.
  • the enclosed by the tubular cap body 3 interior 8 of the cap is divided by a plate 4 into two separate sections.
  • the plate 4 is used for attachment of the stem, not shown, or shaft, or even goes in one piece into this.
  • the injection mold to be used for one-piece production consists of a first mold half 9 and a second mold half 10, as can be seen from the different hatching.
  • the two mold halves in the direction of the arrows P must be pulled apart parallel to the longitudinal axis L of the cap.
  • the plate has for each retaining projection 6, a window 11 which is aligned in the direction of the longitudinal axis L of the closure cap with its associated retaining projection 6.
  • the free cross-sectional area of the window 11 in the direction of the longitudinal axis L is at least as large as the projection of the projecting retaining projection in the direction of the longitudinal axis L.
  • the free cross-sectional area of the window 11 is even larger, for the same reasons yet to be explained ,
  • each of the windows 11 actually has only a local extent, both radially and peripherally, so that the plate 4 is connected in one piece to the cap body 3 wherever no window 11 can be found.
  • each window 11 in the present case is greater than the projection surface of its associated retaining projection 6 - it is extremely appropriate the tongues 12 of the first mold half 9 conical or wedge-like perform at least on its radially inward surface 13, since in this way a particularly reliable sealing pressure with the correspondingly shaped mating surfaces 14 of the second mold half 10 can be achieved.
  • the free cross-sectional area of the windows 11 is larger at least in the radial direction than the projection area of the holding projections 6, while ideally being larger even in the radial direction and in the circumferential direction than the projection area of the holding projections 6.
  • the window 11 does not extend too far in a radially inward direction, so that an undisturbed, circumferentially completely self-contained sealing portion 15 remains on the plate 4 despite the window or windows.
  • This sealing portion 15 can be pressed against a corresponding counter surface on the neck of the cosmetic reservoir or on the neck overlapping collar of the scraper and thereby seals the cosmetic reservoir tight.
  • this sealing portion 15 has the shape of a self-contained annular disc, which lies between the shank neck of the plate 4 and the projection of the holding projections 6, in a plane perpendicular to the longitudinal axis (L) of the cap level, or level crowd.
  • the Fig. 7 shows a section through the equipped with a scraper 16 reservoir 7, on which with the aid of the click-and-close closure, a closure cap 2 is attached, which merges integrally into a shaft or stem approach.
  • the window 11 of which preferably two pieces are provided at diametrically opposite locations.
  • FIG. 8 shows what you can see when you look at it from the right side along the line CC in Fig. 7 guided section looks.
  • the Fig. 9 also shows a section through the already from Fig. 7 shown, equipped with a scraper 16 reservoir 7, on which by means of the click-and-close closure, a cap 2 is attached.
  • the cutting plane is opposite the cutting plane, which is the Fig. 7 shows, rotated 90 ° in the longitudinal axis (L).
  • Fig. 10 shows a view from above in the of Fig. 7 shown cap. Good to see the two windows 11 through which are each aligned with them Shut-off cap-side retaining projections 6 can be seen whose projection area is each slightly smaller than the free cross-sectional area of the relevant window 11th
  • the Fig. 11 finally shows again a perspective view of the invention belonging to cap.
  • the Fig. 12 shows in principle the same as the Fig. 11 , but in a flat view from the side.
  • the closure cap-side holding projections 6 can be seen particularly well. Unlike the container-side retaining projections 5, the closure cap-side retaining projections 6, preferably not designed as wings completely free projecting on all sides, which are connected only on a single side. Rather, the closure cap-side holding projections 6 preferably go on one side into a stop 19 for the container-side stop projections on, which prevents over-rotation, through which the already fixed cap 3 would come free again.
  • the stopper 19 provides a defined closed position of the cap 3 relative to the reservoir 7, so that the cap 3 and the reservoir 7 in the fully closed state readily provide a visually appealing image even if they are not round.
  • the closure cap-side holding projections 6 essentially form the shape of a L, which is connected with its one side edge to the inner surface of the closure cap 3, one leg of which is the actual retaining projection forms, which engages under the retaining projection 5 of the container and the other leg forms the said stop projection 19.
  • FIGS. 13 and 14 show a second embodiment of the invention.
  • the second embodiment differs from the first embodiment in that the closure cap and the container-side holding projections are each provided here with a slope, so that they act in the manner of a screw. Apart from that, there is functional identity with the first embodiment, so that what is said for the first embodiment also applies to this second embodiment, unless otherwise stated below.
  • Figs. 12A and 12B show the windows 11, which are already on hand of the Fig. 6 allow the described production method.
  • the holding projections even if they have a slope, each extend over only a small part of the circumference, preferably in the limits that have already been described for the first embodiment.
  • annular disc-like configuration of the sealing portion 15, which is preferably realized even in this embodiment, may be smaller or possibly even omitted when the plate passes into a cone D, the fixed by the threading action of the retaining projections 6 in the correspondingly trained Inner circumference of the scraper is pressed, as the the Fig. 12B illustrated.
  • the cap according to the invention is predestined to be used in the construction of one-piece applicators, in which the Cap, whose plate, the adjoining stem or stem, as well as the bristle carrier and its bristle trimming consist of a single piece, which is injection-molded in a single or two successive steps.
  • FIGS. 13 to 16 An embodiment is described in which the one-piece applicator is produced by means of a special injection molding process, in which the bristles are made by shooting through the wall of the bristle-carrying portion.
  • the one-piece applicator according to the invention consists of an inventively designed cap 2, which is integrally connected to a shaft 20, see.
  • the shaft 20 has a longitudinal axis which is identical to the cap longitudinal axis L and is therefore also denoted by the reference L.
  • the shaft 20 is in turn subdivided into two sections with different functionality and consists in one piece of a stem portion 21 and a bristle-carrying portion 22, see.
  • the stem portion 21 provides for the sufficient spatial distance between the bristle trim and the handle formed by the cap 2, which is required to give the applicator desired by the users application behavior.
  • the bristle-carrying portion 22 serves to anchor the bristle trim, which allows the order of the cosmetic and preferably consists of at least 300 bristles, which in Fig. 14 are shown only rudimentarily. Said sections are formed by a unitary "main component” called injection molded part 31; So they are jointly designed as a one-piece component, in so far as is on the FIG. 13 which shows the main component 31. Such a main component 31 can be produced very efficiently. As soon as it has been provided with the bristle stock in a next process step, the applicator is finished. one laborious assembly of a brush part to a handle is not required.
  • the closure cap 2 is preferably formed by a tube open at both ends, which ideally in the direction of its side facing away from the bristle facing, has a larger diameter.
  • the closure cap 2 carries here on its side facing the applicator on its inner side retaining projections 6, in this embodiment have no slope here.
  • a connecting member between the shaft 20, or its stem portion 21 and the cap 2 preferably serves a plate 4.
  • This extends substantially in the radial direction relative to the longitudinal axis L and is configured as already described above.
  • the plate is preferably positioned to divide the tubular cap body forming the closure cap 2 into two sections, the length of the portion facing the applicator preferably being about 1/3 the length of the portion facing away from the applicator.
  • the plate 11 preferably has a central plate opening 32.
  • the plate opening 32 allows a mold core can reach through the plate, which ensures that the shaft 20 can be hollow shaped in the region of its stem portion 21 inside, and possibly a sealing cone for sealing forms relative to the scraper, the corresponding cavity carries the reference numeral 31st
  • the stem portion 21 is not necessarily formed hollow over its entire length. Instead, it is preferably designed so that its distal, that is, the cap 2 facing away from the end is solid. Preferably, the stem portion 21 is at least on a length LL (see. Fig. 14 ) formed massive, which accounts for at least 1/6, better still at least 1/4 of its total length. In this way it is reliably prevented that the plastic compound injected in the second step for forming the bristles breaks through the barrier in the stem section which is still warm during short cycle times and penetrates uncontrollably in the direction of the closure cap 2.
  • LL see. Fig. 14
  • the outer diameter of the stem portion 21 decreases in the region of its distal, the cap 2 facing away from the end, also that can be seen from the figures.
  • the bristle-carrying portion 22 is an initially hollow tube, which consists of the same material as the stem portion 21. However, the wall thickness of the bristle-carrying portion 22 is generally lower, it is preferably at most 60%, better less than 40% the wall thickness of the stem portion 21. At the transition between the stem portion 21 and the bristle-carrying portion 22, the wall thickness of the bristle-carrying portion 22 preferably increases toward the inside, cf. Fig. 13 ,
  • the bristle-carrying portion 22 are substantially radially outwardly directed bristles 23 from, as the FIG. 14 hinted at.
  • the bristle spacings are smaller and the number of bristles is significantly greater, since at least 300 bristles of the type in question will normally be found on the applicator, and in some cases even more than 600 bristles may be provided.
  • the effective diameter of the preferably substantially round bristles in the region of their foot is typically in the range between 0.1 mm and 1 mm, preferably in the range between 0.1 mm and 0.4 mm.
  • the bristles 23 are injection-molded bristles, that is to say bristles which have received their shape through the corresponding cavity of an injection mold into which they are usually injected at high pressure, which will be discussed in greater detail below.
  • the injection molding according to the invention also gives the bristles their relevant physical application properties, since injection-molded bristles which have been produced by the method relevant to the invention show the polymer chains forming the bristles a special orientation parallel to the longitudinal axis of the bristle.
  • bristles are preferably addressed such order organs, as in FIG. 15 shown.
  • Each of these bristles 23 preferably has a substantially conical mantle.
  • a cone angle ⁇ is found between 0.5 ° and 2.5 °, cf. FIG. 15 .
  • these bristles Due to the already mentioned orientation of the polymer chains, these bristles are usually very flexible. Therefore, they can typically be deflected reversibly, under the influence of the forces which normally occur during the application, such that their tip moves away from the rest position by a distance S which corresponds to at least three times, and better still at least five times the diameter of the bristle without the bristle permanently deformed.
  • the bristles 23 are injection-molded in that the bristle-forming plastic compound is injected under correspondingly high pressure into the cavity 24 of the bristle-carrying portion 22.
  • This bristle-forming plastic mass which is preferably a plastic mass that is different from that from which the main component 31 has been made, breaks through the wall of the bristle-carrying portion 22 at all those points where seen in the radial direction behind the Bristle-bearing wall of section 22 is an empty, bristle-forming cavity. She shoots in this way in the said cavity.
  • the main component 31 is injected as a one-piece component, wherein when spraying the cap 2 is moved as input to the hand Fig. 6 described, which, however, in the 17 to 19 drawing is not expressed.
  • Fig. 17 shown used multi-part mold.
  • the mold consists of the mold main part 25, and the first slider 26, the Frenster 11 is formed as in Fig. 6 shown.
  • the mold is composed of the first mold side member 27 for forming the bristle-carrying portion 22 and the second slider 28 serving the same purpose.
  • the second slider 28 is sealingly guided in the first mold side member 27.
  • the parting line between the mold main part 25 and the first mold side part 27 is preferably located in a plane which intersects the stem part 21 where it is solid. In this way, a particularly good seal can be ensured.
  • the plastic material, which forms the main component injected and preferably from the side on which the first slider 26 is located.
  • the first mold side part 27 is ideally designed in several parts, so that the individual components of the mold side part 27 can be pulled apart in different directions, as indicated by the arrows 29 and 30 roughly. Still further, the main component is preferably not formed in this stage of the process, that is, the other components of the mold remain in position relative to each other.
  • the components of the injection mold which now still contain the main component, are rotated in order to bring the bristle-carrying section 22 to the side of the injection point in order to be able to later connect the mold surrounding it to the injection point.
  • the freed by the removal of the first mold side member 27 region of the main component is now inserted into a second mold side part 29, as the FIG. 19 shows.
  • This second mold side part 29 preferably also consists of a plurality of components, which are moved in the radial direction relative to each other to the main component, and also can be lifted off this again.
  • this second mold side member 29 is equipped with cavities 30 for the formation of the bristles, such as the FIG. 19 roughly represented.
  • cavities 30 are initially still empty and their mouths are first laid through the wall of the bristle-carrying portion 22.
  • the bristle-forming plastic compound is injected into the cavity 24 of the bristle-carrying section 22 from the side of the arrow E forth.
  • the plastic mass exerts such a large pressure on the wall of the bristle-carrying section 22 from the inside that the plastic mass finally breaks through the wall of the bristle-carrying section 22 wherever the wall bridges the mouth of a bristle-forming cavity 30. In this way, the plastic mass shoots the bristle-forming cavities. Once this is done, wait until this second plastic mass has solidified enough to retain its shape. Then the finished applicator is completely formed.
  • shaping takes place such that the second mold side part 29 is segmented like a cake piece, so that the individual parts of the mold side part 29 can be moved apart in the radial direction so as to be able to mold the bristles without breakage. Then, the first, contrary to the representation in the 17 to 19 in accordance with the Fig. 6 trained slide 26 pulled. Finally, the finished applicator is ejected from the mold main part, which goes without problems thanks to the above-described embodiment of the holding projections of equip.
  • FIG. 20 Another embodiment of the invention shows the FIG. 20 , This embodiment corresponds to the first, just described in detail embodiment in its entirety, so that what is said there also applies to this second embodiment, unless otherwise indicated by the differences described below.
  • the second embodiment is characterized in that in him the shaft 20 is hollow on the entire length inside. Unlike the first embodiment, therefore, the second embodiment has no separation section, which is made massive.
  • the cap 2 is designed in this embodiment, as described above.
  • the omission of the solid separating section makes it possible to create a channel through which the second plastic mass K, which is injected to form the bristles, flows through the shaft 20 into the region of the closure cap 2.
  • the second plastic mass K even flows into the region of the outer circumference of the closure cap and forms there, for example, a haptically and / or visually particularly attractive gripping surface.
  • Fig. 21 shown injected main component 31, which forms the already named functional sections, including the inventively designed cap according to Fig. 6 ,
  • the bristle-carrying portion 22 is now designed as a rule solid rod, which is used for anchoring and usually also for stabilizing mecanic mousseenden in the next step bristle trim, which allows the order of the cosmetic.
  • the diameter of the bristle-bearing portion should be less than 0.5 times the diameter of the stem portion prior to spraying the bristles.
  • the bristle-carrying portion 22 is in the finished applicator preferably from a sleeve an moussetem on him and Surrounded with plastic welded to the entire surface - just the plastic that forms the bristles.
  • the finished applicator are substantially radially outwardly directed bristles 23, such as the FIG. 22 hinted at.
  • the bristle distances are also lower and the number of bristles is significantly larger, it also applies to what already said above.
  • the bristles 23 are injection-molded bristles, that is to say bristles which have received their shape through the corresponding cavity of an injection mold into which they are usually injected at high pressure, which will be discussed in greater detail below.
  • the bristles also receive their relevant application properties, because in injection-molded bristles, which have been prepared by the method relevant to the invention, the polymer chains forming the bristles have a special orientation parallel to the longitudinal axis of the bristle. This usually requires that when spraying the bristles with a correspondingly high injection pressure is used.
  • the injection pressure is ⁇ 900 bar.
  • each of the bristle-forming cavities is preferably deaerated at several points, namely ideally not only at the end of the bristle-forming channel, but also between the beginning and the end of each bristle-forming channel.
  • the production method described above for the first type of applicator is used, but using a first slide-side first mold part 27 and a modified mold side part 29, as far as is understood FIGS. 23 to 25 to refer, which make the difference visible.
  • the second mold side member has in the region of the bristle-carrying portion 22 of the main component 31 has a Formhautkavmaschine having a slightly larger inner diameter than the bristle-carrying portion 22 of the main component.
  • the bristle-forming cavities extend from this main mold cavity in the radial direction.
  • This applicator is made entirely from a single plastic material, from the cap to the bristle.
  • the applicator has a closure cap 2, which is designed as described above and integrally merges into a shaft 20.
  • the shaft 20 in turn consists of one piece of the shaft portion 21 and the likewise integrally adjoining bristle-carrying portion 22, see.
  • Fig. 26 The bristle-carrying portion 22 together with the bristles 23, the stem portion 21, the plate 11 and the cap 2 have been injected together "with a shot" of the same material, which is why everything consists of one piece.
  • the bristle cavities should be designed accordingly, their largest diameter should be smaller by at least a factor of 10, better the factor 15, than its largest extension in the direction of the longitudinal axis of the bristle.
  • each of the bristle-forming cavities is vented at a plurality of spaced apart locations.
  • the bristles also obtain their decisive application properties, because with injection-molded bristles which have been produced according to the method relevant to the invention, the polymer chains forming the bristles have a special orientation parallel to the longitudinal axis of the bristles Bristle.
  • a method according to the preceding paragraph characterized in that the bristle-carrying portion 22 is formed after the injection molding of the blank from the mold imaging it, while the remaining blank remains in the mold cavity used for its production of the main mold, and then in one, his Outside circumference completely enclosing, second form is inserted, which has bristle-forming cavities and which is brought close to the plant to the shaft 20.
  • Cosmetic applicator according to the invention which is distinguished by the fact that the pressure under which the plastic compound is injected during injection molding the mold cavity is injected, greater than or equal to 900 bar and better is greater than or equal to 1200 bar, so that the bristles forming molecular chains undergo an orientation in the direction of the respective bristle longitudinal axis.
  • Inventive cosmetic applicator which is characterized in that the outer diameter (AS) of the stem portion (5), or the sleeve surrounding the stem portion (24) is substantially or consistently greater than the outer diameter (AB) of the bristle-carrying portion (6), wherein the ratio AB / AS is preferably ⁇ 0.8, and ideally ⁇ 0.7.

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Closures For Containers (AREA)
  • Moulds For Moulding Plastics Or The Like (AREA)
EP14178775.4A 2013-08-02 2014-07-28 Clapet de fermeture simplifié doté d'un filetage ou d'une fermeture à baïonnette et applicateur en une pièce ainsi équipé Not-in-force EP2832256B1 (fr)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DE202013006927.9U DE202013006927U1 (de) 2013-08-02 2013-08-02 Einstückiger Applikator mit Fensterkappe

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EP2832256A1 true EP2832256A1 (fr) 2015-02-04
EP2832256B1 EP2832256B1 (fr) 2019-05-29

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EP14178775.4A Not-in-force EP2832256B1 (fr) 2013-08-02 2014-07-28 Clapet de fermeture simplifié doté d'un filetage ou d'une fermeture à baïonnette et applicateur en une pièce ainsi équipé

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US (1) US9622565B2 (fr)
EP (1) EP2832256B1 (fr)
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WO2016005471A1 (fr) 2014-07-08 2016-01-14 Albea Services Applicateur de produit cosmétique, notamment de mascara, ensemble d'un tel applicateur et d'un réceptacle dudit produit, procédé et dispositif de fabrication dudit applicateur
WO2023110908A1 (fr) * 2021-12-13 2023-06-22 Geka Gmbh Outil de moulage par injection compact pour un capuchon muni de préférence d'une tige d'applicateur

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DE202017100438U1 (de) * 2017-01-27 2017-02-08 Geka Gmbh Kosmetikeinheit mit speziellem Magnetverschluss
ES2952766T3 (es) * 2017-09-01 2023-11-06 Oreal Vástago con cierre de bayoneta y dispositivo equipado con el mismo
KR102116224B1 (ko) * 2018-07-23 2020-05-28 정재용 잔량이 방지됨과 동시에 에어타이트 기능을 가지는 화장품 용기
FR3121020B1 (fr) 2021-03-24 2023-11-10 L’Oreal Dispositif de conditionnement et d'application d'un produit fluide
USD986064S1 (en) 2021-03-31 2023-05-16 Mocap Llc Twist and lock telescoping package
IL307222A (en) 2021-03-31 2023-11-01 Mocap Llc Case with telescopic rotation and locking, with user-friendliness and increased reliability

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WO2023110908A1 (fr) * 2021-12-13 2023-06-22 Geka Gmbh Outil de moulage par injection compact pour un capuchon muni de préférence d'une tige d'applicateur

Also Published As

Publication number Publication date
DE202013006927U1 (de) 2014-11-03
EP2832256B1 (fr) 2019-05-29
US20150071696A1 (en) 2015-03-12
US9622565B2 (en) 2017-04-18

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