EP3241781B1 - Tube with throttle insert - Google Patents

Tube with throttle insert Download PDF

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Publication number
EP3241781B1
EP3241781B1 EP17165003.9A EP17165003A EP3241781B1 EP 3241781 B1 EP3241781 B1 EP 3241781B1 EP 17165003 A EP17165003 A EP 17165003A EP 3241781 B1 EP3241781 B1 EP 3241781B1
Authority
EP
European Patent Office
Prior art keywords
throttle
tube
connecting piece
insert
distal
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.)
Active
Application number
EP17165003.9A
Other languages
German (de)
French (fr)
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EP3241781A1 (en
Inventor
Andreas Geiger
Andreas Eggenberg
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.)
Hoffmann Neopac AG
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Hoffmann Neopac AG
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Publication date
Application filed by Hoffmann Neopac AG filed Critical Hoffmann Neopac AG
Priority to PL17165003T priority Critical patent/PL3241781T3/en
Publication of EP3241781A1 publication Critical patent/EP3241781A1/en
Application granted granted Critical
Publication of EP3241781B1 publication Critical patent/EP3241781B1/en
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Classifications

    • 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
    • B65D47/00—Closures with filling and discharging, or with discharging, devices
    • B65D47/04—Closures with discharging devices other than pumps
    • B65D47/06—Closures with discharging devices other than pumps with pouring spouts or tubes; with discharge nozzles or passages
    • B65D47/18—Closures with discharging devices other than pumps with pouring spouts or tubes; with discharge nozzles or passages for discharging drops; Droppers
    • 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
    • B65D35/00—Pliable tubular containers adapted to be permanently or temporarily deformed to expel contents, e.g. collapsible tubes for toothpaste or other plastic or semi-liquid material; Holders therefor
    • B65D35/24—Pliable tubular containers adapted to be permanently or temporarily deformed to expel contents, e.g. collapsible tubes for toothpaste or other plastic or semi-liquid material; Holders therefor with auxiliary devices
    • B65D35/40—Pliable tubular containers adapted to be permanently or temporarily deformed to expel contents, e.g. collapsible tubes for toothpaste or other plastic or semi-liquid material; Holders therefor with auxiliary devices for metering discharge

Definitions

  • the invention relates to a tube with a throttle insert, a throttle insert and a method for producing a tube according to the preambles of claims 1, 7 and 10.
  • liquids must be dispensed dropwise or metered. This is especially true for liquids with pharmaceutical or cosmetic agents or for liquids with dyes, flavors or fragrances, which are used for example in the processing of food.
  • the viscosity of such liquids is in the range of 1 to 100 mPas.
  • Liquids are also referred to as liquid mixtures and emulsions.
  • Suitable containers for storing and dispensing such liquids are in particular tubes and tube-like small bottles. These include a reservoir containing the liquid to be dispensed, and a spout having a dispensing opening.
  • the nozzle forms an output channel, the distal end of which is connected to the reservoir, and at the proximal end of which the dispensing aperture is arranged.
  • proximal and distal refer to the location or direction relative to the dispensing opening, respectively.
  • Various factors affect the size or volume of drops that form the liquid at the dispensing opening, before these drops come off the nozzle.
  • Such factors are, for example, the interfacial tension and the surface tensions of the liquid and the nozzle to be dispensed, the size and shape of the nozzle in the region of the dispensing opening, the pressure and the flow rate of the liquid in the dispensing channel, and the gravity acting on the exiting liquid.
  • a pressure force acting on the respective tube in addition to the ambient pressure causes an increase in pressure in the interior of the reservoir relative to the ambient pressure.
  • liquid is displaced from the reservoir through the discharge channel to the discharge opening, where it exits the tube.
  • the volume flow discharged through the dispensing opening also increases.
  • This dependence of the volume flow of the pressure force which exerts a person in addition to the ambient pressure on the tube, prevents or hampers the formation of uniformly large drops. Dosing the liquid by dispensing evenly large drops is thereby impaired or even made impossible.
  • tubes whose jacket is elastically deformable wherein the jacket can be made of plastic or of a composite material with plastic, for example, causes the elastic restoring force of the material in the absence of forces that act in addition to the ambient pressure from the outside of the jacket, that the pressure in the reservoir is less than the ambient pressure. If there is a sufficiently large pressure difference, liquid which is located in the discharge channel is forced back into the reservoir by the suction, ambient air penetrating through the discharge opening into the discharge channel.
  • a tube which comprises an output channel in the form of an elongated nozzle.
  • the distal end of the neck is connected via a tube shoulder with the tube jacket.
  • the neck is slightly conical on the outside and inside, with the inside diameter decreasing from the distal end to the dispensing opening.
  • an insert is inserted into the nozzle in such a way that a stop element of the insert abuts against the inside of the tube shoulder and thereby prevents the insert in the direction of the dispensing opening can continue to penetrate into the nozzle.
  • the insert includes a proximal and a distal portion whose lateral surfaces in this position sealingly abut the inner wall of the nozzle.
  • Both portions of the insert are interconnected by a smaller diameter connecting neck such that the inside of the tubular neck and the insert are annular Limit gap.
  • the intermediate space is connected by a respective longitudinal groove in the distal and in the proximal portion of the insert with the interior of the tube body and with the adjacent to the discharge opening portion of the discharge channel. An additional recess in the stop element ensures that the connection to the interior of the tube body is ensured.
  • a throttle passage is formed, which acts as a flow resistance and limits the volume flow of the liquid to be dispensed even when the tube is compressed. This ensures that droplet formation at the dispensing opening is largely independent of the pressure exerted on the tube.
  • the insert comprises in the distal direction axially adjacent to the stop element an extension which can be used as an assembly aid for inserting the insert into the nozzle.
  • This extension is formed coaxially and mirror-symmetrically to the front part of the insert, wherein the plane of symmetry is in the region of the stop element.
  • the extension protrudes comparatively far into the tube body.
  • the flexible tube jacket When the flexible tube jacket is compressed, it can come into contact with the extension and exert a force on the insert. As a result, the frictional connection between the lateral surfaces of the insert and the inner wall of the nozzle can be solved.
  • the insert and the neck are conical and matched in shape and size exactly matched.
  • the lateral surfaces of the insert In a relative axial position, which is determined by the stop element and the tube shoulder, the lateral surfaces of the insert must bear against the inner wall of the nozzle by exerting a radial pressure force surface sealing. This requires a sufficiently large length of the nozzle and the insert in the axial direction.
  • the neck is formed as an elongate cannula and includes a portion adjacent to the tube shoulder with an external thread and adjacent thereto a front portion with the discharge opening. The insert extends in the axial direction beyond the section with the external thread into the front section. The diameter of the discharge channel is small, even at the distal end of the nozzle, compared to the length of the nozzle.
  • US 2011/125111 A1 discloses a tube or a choke insert according to the preamble of claims 1 and 7 with a solid body whose profile is dome-shaped.
  • An object of the present invention is to provide a tube with an output channel and a throttle insert securely mounted in this output channel and a throttle insert for such a tube. Another object of the invention is to provide a method for attaching the throttle insert in the tube.
  • the container preferably in the form of a tube or a tube-like bottle, comprises a reservoir for a fluid medium and a nozzle with an outlet channel which connects a dispensing opening to the reservoir.
  • the dispensing opening is located at a forward portion of the neck, also referred to as a proximal portion.
  • This proximal portion may be formed differently according to the respective requirements and include, for example, an elongated conical cannula, a ring body with a short tube section or a disc with a central opening. Parameters such as shape, size, opening area, material, or surface finish of the proximal portion may be optimized according to the fluid being dispensed so as to favor delivery of drops of a desired size or volume.
  • a distal portion of the neck preferably comprises an external thread for screwing on a protective cap, but binding at least one general outer support structure for securing such a protective cap.
  • the output channel is at least approximately cylindrical or slightly conical in this area formed, wherein the inner diameter axially remains the same or increases in the distal direction.
  • the distal end of the neck is connected via a tube shoulder with a tube jacket, which encloses the reservoir.
  • a throttle insert formed essentially as a plug-like rotary body is inserted into the distal section of the nozzle, thereby reducing the free cross-section of the dispensing channel.
  • the throttle insert is dome-shaped, preferably a hood-like injection molding. Such parts can be efficiently manufactured and easily inserted into the neck. In addition, the amount of material required for the production compared to a solid body is low.
  • the throttle insert forms a baffle or obstruction to a liquid which is conveyed in the discharge channel from the reservoir in the direction of the discharge opening.
  • the maximum volume flow of the liquid which is displaced from the reservoir to the discharge opening at a certain overpressure in the reservoir relative to the ambient pressure, can be limited or throttled. This can be ensured at the discharge opening a uniform droplet formation at the discharge opening.
  • the throttle insert obstructs the dispensing channel with the exception of one or more throttle channels, which form a bottleneck in the dispensing channel.
  • the outer diameter of the throttle insert is greatest in the region of a lower or distal outer edge, where an outer lateral surface and an end-face stop ring of the throttle insert meet one another.
  • This stop ring undercuts a shoulder, which is formed in the distal portion of the nozzle on the inner wall.
  • the shoulder may in particular comprise an annular bead projecting on the inner wall of the connecting piece or at least a portion of such an annular bead.
  • the shoulder may also comprise a portion of the interface of an annular recess on the inner wall of the nozzle.
  • Such a paragraph may e.g. be already prefabricated in the production of the nozzle or the tube part with the nozzle as injection molding.
  • the shoulder is formed only when pressing in the throttle insert, wherein the inner wall of the nozzle is plastically deformed by radially acting pressure forces with which the throttle insert acts on the nozzle and thereby adapts to the shape of the throttle insert at least in the region of the stop ring.
  • This effect is favored when the material of the throttle insert is harder than that of the nozzle and not or only slightly insignificant during pressing deformed.
  • the insert may be made of polypropylene and the tube head of polyethylene, preferably HDPE.
  • the edge angle which enclose the outer lateral surface and the end-side stop ring at the outer edge, 90 ° or smaller, and the outer edge is comparatively sharp. This favors the penetration of this edge into the nozzle and the displacement of material of the nozzle during pressing, so that the edge easily wedged with the nozzle and prevents the re-emergence of the throttle insert.
  • the outer edge of the stop ring has a pitch angle which is greater than or equal to 0 °. This allows a particularly secure positive connection of the throttle insert with the nozzle.
  • the outer lateral surface of the throttle insert Adjacent to the lower outer edge, the outer lateral surface of the throttle insert comprises a distal portion whose pitch angle preferably corresponds substantially to the pitch angle of the inner wall of the nozzle at this point.
  • the pitch angle is thus at least approximately 90 °.
  • a non-positive surface connection of the throttle insert with the neck can be effected.
  • one or more primary throttle passages are disposed along the periphery of the throttle insert, each of these primary throttle passages being separated by a groove-shaped recess on the outer surface of the throttle insert and is limited by the inner wall of the nozzle.
  • Throttle inserts of this type can be produced relatively easily and inexpensively in different variants. Already with a few simple changes of the tool for the production of such injection-molded parts, for example, number, arrangement, shape and size of such throttle channels can be changed. The production of appropriate tools is also relatively easy and inexpensive.
  • throttle channels which form a bottleneck with a very small cross-sectional area, can be produced without problems.
  • the length of the primary throttle channels can be specified.
  • a longer throttle channel forms a larger flow resistance for the liquid.
  • the flow resistance can be further influenced by, for example, one or more stages changing the free cross-sectional area along the flow path.
  • the outer lateral surface of the throttle insert Adjacent to the distal portion, the outer lateral surface of the throttle insert preferably comprises a proximal portion which continuously or stepwise decreases down to an upper or proximal outer edge, so that the inner wall of the nozzle and the outer surface of the throttle insert an annular space limit, in the open or the primary throttle channels.
  • Adjacent to the proximal outer edge of the throttle insert comprises a cover portion, which completes the separation of the output channel in a proximal region facing the output port and a distal region facing the reservoir.
  • the throttle insert or its cover portion may be arranged with a sufficiently large distance from the proximal portion of the neck so that the proximal portion of the dispensing channel between the annulus and the dispensing opening no longer includes bottlenecks and liquid can pass unhindered from the annulus to the dispensing opening.
  • the cover portion of the throttle insert comprises a disc-like or pan-shaped central region and a peripherally arranged contact ring.
  • the contact ring is an annular shoulder that protrudes axially at the central portion of the deck portion.
  • the contact ring adjoins the proximal outer edge of the lateral surface and comprises an end face contact surface, which preferably rests in the mounted state of the throttle insert on the inside of the proximal portion of the nozzle.
  • one or more grooves are excluded at the contact surface, which together with the adjacent part of the nozzle one or more secondary throttle channels limit.
  • the cover section delimits, together with the distal section of the neck, a dispensing space whose size or volume can be predetermined by the shape of the cover section, in particular by the size of a pan shaped in the cover section.
  • the thus defined volume can be used, for example, as an aid for dosing a quantity of liquid to be dispensed, first by squeezing the tube shell in an upright tube filled the pan volume with liquid and then the liquid collected in the pan by rotating the tube without pressure on the tube coat dropwise through the Output port is issued.
  • the secondary throttle channels can be used analogously to the primary throttle channels for further limiting the volume flow of the liquid.
  • the shape of the throttle insert thus parameters can be influenced, which affect the liquid output.
  • the number, length and cross section of the primary and secondary throttle channels as well as the sizes of the annular space and the output space can be adjusted according to the liquid to be dispensed.
  • Throttle inserts can be easily manufactured with different heights and outside diameters and thus optimized for tubes with different dispensing nozzles. If the positive connection of the throttle insert with the Output spout is made by radial compression of these parts, tools that are used for the production of tubing parts with conventional dispensing nozzle, can be used unchanged for the production of corresponding parts for the inventive tubes.
  • the neck of a tube is made as a one-piece molding, which also includes the tube shoulder.
  • the tube jacket is made, for example, from a laminate film, which may comprise a barrier layer made of metal or plastic, formed into a tube and welded to the tube shoulder or connected in any other way.
  • the throttle insert can be easily grasped by a gripper and inserted from the distal side into the nozzle, where it is radially compressed in a predetermined axial position with the nozzle.
  • the throttle insert for this purpose comprises a cylindrical or slightly conical mounting pin which projects axially on the distal side of the cover portion.
  • the tube opening can now still be closed by a removable protective cap.
  • Such prepared tubes can be sterilized before filling with the liquid.
  • the materials used are chosen so that they are the ones required environmental conditions such as high temperatures unscathed tolerated.
  • the open distal end of the tube sheath is e.g. closed by welding.
  • FIG. 1 shows a first embodiment of a tube 1 with a reservoir 3 for a fluid or liquid medium, wherein the reservoir 3 is surrounded by a tube jacket 5 or enclosed.
  • the tube jacket 5 is preferably made of a multilayer laminate film comprising at least one plastic layer and preferably a barrier layer of metal or plastic and formed into a tube.
  • Via a tube shoulder 7, a front edge of the tube jacket 5 is connected to a distal portion 9b of a tubular neck 9, which forms an output channel 13.
  • an output port 11 is formed, which is connected via the output channel 13 to the reservoir 3.
  • the nozzle 9 and the tube shoulder 7 can be made as a continuous injection molded part, which is substantially rotationally symmetrical with respect to a tube axis X with the exception of an external thread 15 in the distal portion 9b of the nozzle 9.
  • the proximal portion 9a of the neck 9 is an annular disc whose central recess is the dispensing opening 11.
  • the diameter D1 of the discharge opening 11 is smaller than the smallest inner diameter D2a of the discharge channel 13 in the adjacent distal portion 9b of the nozzle 9.
  • the annular disc thus forms a stop surface which projects radially inwards on the inner wall of the nozzle 9.
  • This inner wall has, with respect to a normal plane to the tube axis X, an inclination angle ⁇ , e.g. may be in the range of 75 ° to 90 °.
  • a throttle insert 31 which in the FIGS. 2 to 4 is shown in detail, is inserted into the output channel 13 that it has a small distance S1 to the annular disc or the abutment surface of the proximal portion 9a of the nozzle 9, said distance S1 is preferably in the range of 0 to 1mm.
  • the throttle insert 31 essentially comprises a dome-shaped or hood-like rotational body with an outer lateral surface 33 which extends from a lower or distal outer edge 35 with a maximum diameter D3a over a height H to an upper or proximal outer edge 37 with a diameter D3b extends, D3b is smaller than D3a.
  • the pitch angle of the lateral surface 33 may change continuously or stepwise.
  • the outer diameter of the lateral surface 33 along the height H could shrink with one or more steps. Adjacent to the proximal outer edge 37 is the outer diameter of the Throttle insert 31 smaller than at the distal outer edge 35th
  • annular shoulder 17a is formed on the inner wall of the nozzle 9, whose outer diameter corresponds to the maximum outer diameter D3a of the throttle insert 31.
  • This annular shoulder 17a may be comparatively narrow and preferably has a width which is of the order of 0.1 mm to 0.6 mm, in particular from 0.1 mm to 0.2 mm.
  • the annular shoulder 17 a is the lowermost portion or a distal end portion of an annular recess 17, which causes the distal portion 9 b of the throttle insert 31 when pressed into the cylindrical or conical inner wall of the nozzle 9.
  • the annular shoulder 17 a is the lowermost portion or a distal end portion of an annular recess 17, which causes the distal portion 9 b of the throttle insert 31 when pressed into the cylindrical or conical inner wall of the nozzle 9.
  • the throttle insert 31 comprises an end stop ring 39 adjoining the lateral surface 33, which preferably lies in an orthogonal plane to the axis Y of the throttle insert 31 or alternatively may have an inclination angle between 0 ° and approximately 60 ° (not shown).
  • an annular cavity 41 is excluded from the body of the throttle insert 31. This brings about a solid body material savings and a more uniform material thickness, which is advantageous for the efficient production of an injection molded part. This is particularly important for the production of throttle inserts with comparatively large outside diameters.
  • a tool or a punch can be introduced into the cavity 41, which rests against the inner wall of the throttle insert 31 and favors the radial insertion of the throttle insert 31 into the inner wall of the nozzle 9.
  • a preferably cylindrical or slightly conical axial mounting pin protrudes in the distal direction on a base plate 43 which delimits the cavity 41 at the end 45, preferably beyond the plane of the distal outer edge 35 addition.
  • a groove-like primary throttle channel 47 is embedded in the lateral surface 33, the distal end of the end stop ring 39 opens and its proximal end opens in the proximal portion of the lateral surface 33, where the outer diameter D3 of the lateral surface 33 for limiting the annulus 19th is smaller.
  • the depth S2 of the primary throttle channel 47 and the radius R1 of the throttle insert 31 in the region of the primary throttle channel 47 are dimensioned so that when the throttle insert 31 is inserted into the nozzle 9, at both ends of the primary throttle channel 47 has a passage opening for the passage of Liquid from the reservoir 3 in the annular space 19 remains free.
  • the cross section of these passage openings can be optimized according to the dispensed liquid and the respective shape of the nozzle 9.
  • nozzle 9 of various tubes Since at least the distal region of nozzle 9 of various tubes is standardized, a multiplicity of different tubes can be equipped with comparatively few embodiments of the throttle insert 31. Since the throttle insert 31 is inserted in the interior of the nozzle 9 in the output channel 13, standardized closures can be used in such tubes and.
  • an end-side cover section 50 of the throttle insert 31 adjoins with a peripheral contact ring 49 to the lateral surface 33 at.
  • the central region of the cover section 50 is disc-shaped or designed as a socket-like depression 53.
  • one or more grooves are provided on the contact ring 49, which are intended to limit one or more secondary throttle channels 51 together with the adjacent part of the neck 9, if the contact ring 49 in the proximal portion 9a on the inside of the Stutzens 9 is in contact or in contact with this inside.
  • the ends of these secondary throttle channels 51 open into the annular space 19 and into an output space 55 which is connected to the discharge opening 11 and which is bounded by the proximal portion 9 a of the nozzle 9 and by the cover portion 50 of the throttle insert 31. If the cover portion 50 adjacent to the contact ring 49 has a recess 53, this can be used for dosing a certain amount of liquid to be dispensed.
  • liquid 3 is first conveyed into pan 53 by squeezing reservoir 3 until it is full. If the liquid level exceeds the edge of the contact ring 49, the excess liquid can be sucked back into the reservoir 3 by a negative pressure in the reservoir 3, which is caused by the elastic restoring force of the tube jacket 5.
  • the throttle insert 31 can be arranged axially in the neck 9 such that it does not bear directly on the proximal portion 9a of the neck 9, so that an annular gap remains free between the contact ring 49 and the proximal portion 9a of the neck 9.
  • This gap connects the annulus 19, in addition or as an alternative to the secondary throttle channels 51, to the dispensing space 55.
  • the gap width S1 and the cross-sectional area of the secondary orifice 51 may have the flow resistance that the throttling insert 31 opposes to a particular liquid as it exits the reservoir 3 is displaced to the discharge opening 11, additionally influenced.
  • the external thread 15 is a M9x1.5 thread.
  • the corresponding throttle insert 31 has a maximum outer diameter D3a of 5.5 mm and a height H of 3.2 mm.
  • the number of primary throttle channels 47 is 1 and the number of secondary throttle channels 51 is 3, wherein all the throttle channels 47, 51 evenly distributed with angular intervals of 90 ° at the throttle insert 31 are arranged.
  • the invention also includes other embodiments of the tube 1 and / or the throttle insert 31, in which in particular the number, the arrangement, the cross sections, and the shape of the primary throttle channels 47 and / or the secondary throttle channels 51 may be different.
  • primary Throttle channels 47 and secondary throttle channels 51 offset from each other. This favors a further increase in the flow resistance.
  • FIGS. 6, 7, and 8 show further embodiments of tubes 1 with throttle inserts 31.
  • the proximal portion 9a of the neck 9 comprises a slightly conical cannula 10, at the narrower end of which the delivery opening 11 is arranged, and whose broader end is connected via an annular flange 12 to the distal portion 9b of the neck 9.
  • the external thread 15 is a M11x1.5 - thread.
  • the throttle insert 31 has a maximum outer diameter D3a of 7.2 mm and a height H of 3.6 mm. Compared to the embodiment of the throttle insert 31 according to FIG. 3 the contact ring 49 is wider.
  • the diameter of the pan 53 is comparatively small and the secondary throttle channels 51 extend radially to the tube axis X out beyond the inner edge of the annular flange 12, so that the opening into the discharge chamber 55 ends are no longer covered by the annular flange 12.
  • the in FIG. 7 shown further tubes 1 comprises a M22x1.5 - external thread 15.
  • the throttle insert 31 has a maximum outer diameter D3a of 18.3 mm and a height H of 5.3 mm. Compared to the embodiment of the Throttle insert 31 according to FIG. 3 is the outer diameter D3a compared to the height H significantly larger.
  • the contact ring 49 is a comparatively narrow ring whose width and height can be between 0 and 1 mm, for example.
  • Correspondingly short are the secondary throttle channels 51.
  • the pan 53 in the cover section 50 comprises, adjacent to the contact ring 49, an outer ring 53a or a first annular step, which lies substantially at the base level of the contact ring 49.
  • the outer ring 53a is a flange-like edge of an inner socket 53b, the bottom of which lies at a significantly lower level between that of the distal outer edge 35 and the outer ring 53a.
  • the inner edge of the outer ring 53a has a larger radius than the discharge opening 11, so that the outer ring 53 is completely covered by the proximal portion 9a of the nozzle 9.
  • the proximal portion 9a of the neck 9 is formed as an annular collar adjoining the distal portion 9b, the inner edge of which is a tubular portion 21, the proximal end of which defines the dispensing opening 11.
  • the shape and size of the throttle insert 31 is matched to the shape of the nozzle 9, that the distal end portion of the tube section 21 is immersed in the pan 53 and axially overlaps the edge of the pan 53, such that the inner wall of the pan 53 and the end region of the pipe section 21 form an annular gap 23 which connects the annular space 19 with the discharge space 55.
  • the pipe section 21 may, as in FIG. 8 be chalked outside.
  • the pan wall is inclined accordingly.
  • secondary throttle channels 51 these may be arranged in an analogous manner on the inner wall of the pan 53. This has the advantage that even if the inner wall of the pan 53 rests against the pipe section 21, at least the free cross-sectional area of the secondary throttle channels 51 remains free for the passage of liquid.
  • a drip tap 46 into the distal end of the pipe section 21 into it.
  • the formation of drops of the liquid to be dispensed can be influenced by properties of the pipe section 21 and of the throttle insert 31, in particular also of the dripping pin 46.
  • surface properties such as roughness and surface tension have a significant influence on the type of droplet formation.

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Closures For Containers (AREA)
  • Containers And Packaging Bodies Having A Special Means To Remove Contents (AREA)
  • Infusion, Injection, And Reservoir Apparatuses (AREA)

Description

Die Erfindung betrifft eine Tube mit einem Drosseleinsatz, einen Drosseleinsatz sowie ein Verfahren zum Herstellen einer Tube gemäss den Oberbegriffen der Patentansprüche 1, 7 und 10.The invention relates to a tube with a throttle insert, a throttle insert and a method for producing a tube according to the preambles of claims 1, 7 and 10.

In verschiedenen Anwendungsgebieten müssen Flüssigkeiten tropfenweise abgegeben bzw. dosiert werden. Dies gilt insbesondere für Flüssigkeiten mit pharmazeutischen oder kosmetischen Wirkstoffen oder für Flüssigkeiten mit Farbstoffen, Aromastoffen oder Duftstoffen, die beispielsweise bei der Verarbeitung von Lebensmitteln angewendet werden. Vorzugsweise liegt die Viskosität solcher Flüssigkeiten im Bereich von 1 bis 100 mPa s. Als Flüssigkeiten werden auch Flüssigkeitsgemische und Emulsionen bezeichnet.In various applications, liquids must be dispensed dropwise or metered. This is especially true for liquids with pharmaceutical or cosmetic agents or for liquids with dyes, flavors or fragrances, which are used for example in the processing of food. Preferably, the viscosity of such liquids is in the range of 1 to 100 mPas. Liquids are also referred to as liquid mixtures and emulsions.

Geeignete Behälter zum Aufbewahren und Ausgeben solcher Flüssigkeiten sind insbesondere Tuben und tubenartige kleine Flaschen. Diese umfassen ein Reservoir, welches die auszugebende Flüssigkeit enthält, und einen Stutzen mit einer Ausgabeöffnung. Der Stutzen bildet einen Ausgabekanal, dessen distales Ende mit dem Reservoir verbunden ist, und an dessen proximalem Ende die Ausgabeöffnung angeordnet ist. Die Begriffe "proximal" und "distal" beziehen sich jeweils auf die Lage oder Richtung relativ zur Ausgabeöffnung. Verschiedene Faktoren beeinflussen die Grösse bzw. das Volumen von Tropfen, welche die Flüssigkeit bei der Ausgabeöffnung bilden, bevor sich diese Tropfen vom Stutzen lösen. Solche Faktoren sind beispielsweise die Grenzflächenspannung bzw. die Oberflächenspannungen der auszugebenden Flüssigkeit und des Stutzens, die Grösse und Form des Stutzens im Bereich der Ausgabeöffnung, der Druck und die Strömungsgeschwindigkeit der Flüssigkeit im Ausgabekanal sowie die auf die austretende Flüssigkeit wirkende Schwerkraft.Suitable containers for storing and dispensing such liquids are in particular tubes and tube-like small bottles. These include a reservoir containing the liquid to be dispensed, and a spout having a dispensing opening. The nozzle forms an output channel, the distal end of which is connected to the reservoir, and at the proximal end of which the dispensing aperture is arranged. The terms "proximal" and "distal" refer to the location or direction relative to the dispensing opening, respectively. Various factors affect the size or volume of drops that form the liquid at the dispensing opening, before these drops come off the nozzle. Such factors are, for example, the interfacial tension and the surface tensions of the liquid and the nozzle to be dispensed, the size and shape of the nozzle in the region of the dispensing opening, the pressure and the flow rate of the liquid in the dispensing channel, and the gravity acting on the exiting liquid.

Insbesondere bei Tuben oder tubenartigen Behältern, deren Reservoir durch einen verformbaren Mantel begrenzt ist, bewirkt eine von aussen zusätzlich zum Umgebungsdruck auf die jeweilige Tube einwirkende Druckkraft eine Druckerhöhung im Inneren des Reservoirs gegenüber dem Umgebungsdruck. Dadurch wird Flüssigkeit aus dem Reservoir durch den Ausgabekanal zur Ausgabeöffnung hin verdrängt, wo sie aus der Tube austritt. Mit zunehmendem Druck nimmt auch der durch die Ausgabeöffnung abgeführte Volumenstrom der Flüssigkeit zu. Diese Abhängigkeit des Volumenstroms von der Druckkraft, die eine Person zusätzlich zum Umgebungsdruck auf die Tube ausübt, verhindert oder behindert die Ausbildung gleichmässig grosser Tropfen. Ein Dosieren der Flüssigkeit durch Ausgabe gleichmässig grosser Tropfen wird dadurch beeinträchtigt oder gar verunmöglicht.In particular, in the case of tubes or tube-like containers whose reservoir is delimited by a deformable jacket, a pressure force acting on the respective tube in addition to the ambient pressure causes an increase in pressure in the interior of the reservoir relative to the ambient pressure. As a result, liquid is displaced from the reservoir through the discharge channel to the discharge opening, where it exits the tube. As the pressure increases, the volume flow discharged through the dispensing opening also increases. This dependence of the volume flow of the pressure force, which exerts a person in addition to the ambient pressure on the tube, prevents or hampers the formation of uniformly large drops. Dosing the liquid by dispensing evenly large drops is thereby impaired or even made impossible.

Bei Tuben, deren Mantel elastisch verformbar ist, wobei der Mantel z.B. aus Kunststoff oder aus einem Verbundmaterial mit Kunststoff gefertigt sein kann, bewirkt die elastische Rückstellkraft des Materials beim Wegfall von Kräften, die zusätzlich zum Umgebungsdruck von aussen auf den Mantel wirken, dass der Druck im Reservoir kleiner ist als der Umgebungsdruck. Bei ausreichend grosser Druckdifferenz wird dadurch Flüssigkeit, die sich im Ausgabekanal befindet, durch den Sog zurück in das Reservoir gedrängt, wobei Umgebungsluft durch die Ausgabeöffnung in den Ausgabekanal eindringt.In tubes whose jacket is elastically deformable, wherein the jacket can be made of plastic or of a composite material with plastic, for example, causes the elastic restoring force of the material in the absence of forces that act in addition to the ambient pressure from the outside of the jacket, that the pressure in the reservoir is less than the ambient pressure. If there is a sufficiently large pressure difference, liquid which is located in the discharge channel is forced back into the reservoir by the suction, ambient air penetrating through the discharge opening into the discharge channel.

Aus der WO2013/075256A1 ist eine Tube bekannt, die einen Ausgabekanal in Gestalt eines länglichen Stutzens umfasst. Das distale Ende des Stutzens ist über eine Tubenschulter mit dem Tubenmantel verbunden. Der Stutzen ist aussen und innen leicht konisch ausgebildet, wobei sich der Innendurchmesser vom distalen Ende zur Ausgabeöffnung hin verringert. Vom distalen Ende des Stutzens her ist ein Einsatz derart in den Stutzen eingeführt, dass ein Anschlagelement des Einsatzes an der Innenseite der Tubenschulter anschlägt und dadurch verhindert, dass der Einsatz in Richtung der Ausgabeöffnung weiter in den Stutzen eindringen kann. Der Einsatz umfasst einen proximalen und einen distalen Abschnitt deren Mantelflächen in dieser Position dichtend an der Innenwand des Stutzens anliegen. Beide Abschnitte des Einsatzes sind durch einen Verbindungshals mit kleinerem Durchmesser miteinander verbunden, sodass die Innenseite des rohrartigen Stutzens und der Einsatz einen ringförmigen Zwischenraum begrenzen. Der Zwischenraum ist durch je eine Längsnut im distalen und im proximalen Abschnitt des Einsatzes mit dem Inneren des Tubenkörpers und mit dem an die Ausgabeöffnung angrenzenden Abschnitt des Ausgabekanals verbunden. Eine zusätzliche Ausnehmung im Anschlagelement stellt sicher, dass die Verbindung zum Inneren des Tubenkörpers gewährleistet ist.From the WO2013 / 075256A1 a tube is known which comprises an output channel in the form of an elongated nozzle. The distal end of the neck is connected via a tube shoulder with the tube jacket. The neck is slightly conical on the outside and inside, with the inside diameter decreasing from the distal end to the dispensing opening. From the distal end of the nozzle ago an insert is inserted into the nozzle in such a way that a stop element of the insert abuts against the inside of the tube shoulder and thereby prevents the insert in the direction of the dispensing opening can continue to penetrate into the nozzle. The insert includes a proximal and a distal portion whose lateral surfaces in this position sealingly abut the inner wall of the nozzle. Both portions of the insert are interconnected by a smaller diameter connecting neck such that the inside of the tubular neck and the insert are annular Limit gap. The intermediate space is connected by a respective longitudinal groove in the distal and in the proximal portion of the insert with the interior of the tube body and with the adjacent to the discharge opening portion of the discharge channel. An additional recess in the stop element ensures that the connection to the interior of the tube body is ensured.

Auf diese Weise wird ein Drosseldurchgang gebildet, der als Strömungswiderstand wirkt und den Volumenstrom der auszugebenden Flüssigkeit auch dann beschränkt, wenn die Tube zusammengedrückt wird. Dadurch wird sichergestellt, dass die Tröpfchenbildung bei der Ausgabeöffnung weitgehend unabhängig ist von der Druckkraft, die auf die Tube ausgeübt wird.In this way, a throttle passage is formed, which acts as a flow resistance and limits the volume flow of the liquid to be dispensed even when the tube is compressed. This ensures that droplet formation at the dispensing opening is largely independent of the pressure exerted on the tube.

Der Einsatz umfasst in distaler Richtung axial angrenzend an das Anschlagelement einen Fortsatz, der als Montagehilfe zum Einführen des Einsatzes in den Stutzen nutzbar ist. Dieser Fortsatz ist koaxial und spiegelsymmetrisch zum vorderen Teil des Einsatzes ausgebildet, wobei die Symmetrieebene im Bereich des Anschlagelements liegt.The insert comprises in the distal direction axially adjacent to the stop element an extension which can be used as an assembly aid for inserting the insert into the nozzle. This extension is formed coaxially and mirror-symmetrically to the front part of the insert, wherein the plane of symmetry is in the region of the stop element.

Der Fortsatz ragt vergleichsweise weit in den Tubenkörper hinein. Beim Zusammendrücken des flexiblen Tubenmantels kann dieser in Kontakt mit dem Fortsatz gelangen und eine Kraft auf den Einsatz ausüben. Dadurch kann sich die kraftschlüssige Verbindung zwischen den Mantelflächen des Einsatzes und der Innenwand des Stutzens lösen.The extension protrudes comparatively far into the tube body. When the flexible tube jacket is compressed, it can come into contact with the extension and exert a force on the insert. As a result, the frictional connection between the lateral surfaces of the insert and the inner wall of the nozzle can be solved.

Bei einer Tube, wie sie in der WO2013/075256A1 offenbart ist, sind der Einsatz und der Stutzen konisch ausgebildet und in Form und Grösse genau aufeinander abgestimmt. In einer relativen axialen Lage, die durch das Anschlagelement und die Tubenschulter bestimmt ist, müssen die Mantelflächen des Einsatzes unter Ausübung einer radialen Andruckkraft flächig dichtend an der Innenwand des Stutzens anliegen. Dies bedingt eine ausreichend grosse Länge des Stutzens und des Einsatzes in axialer Richtung. WO2013/075256A1 offenbart, dass der Stutzen als längliche Kanüle ausgebildet ist und einen an die Tubenschulter angrenzenden Abschnitt mit einem Aussengewinde und daran angrenzend einen Frontabschnitt mit der Ausgabeöffnung umfasst. Der Einsatz erstreckt sich in axialer Richtung über den Abschnitt mit dem Aussengewinde hinaus in den Frontabschnitt hinein. Der Durchmesser des Ausgabekanals ist selbst am distalen Ende des Stutzens klein im Vergleich zur Länge des Stutzens.In a tube, as in the WO2013 / 075256A1 is disclosed, the insert and the neck are conical and matched in shape and size exactly matched. In a relative axial position, which is determined by the stop element and the tube shoulder, the lateral surfaces of the insert must bear against the inner wall of the nozzle by exerting a radial pressure force surface sealing. This requires a sufficiently large length of the nozzle and the insert in the axial direction. WO2013 / 075256A1 discloses that the neck is formed as an elongate cannula and includes a portion adjacent to the tube shoulder with an external thread and adjacent thereto a front portion with the discharge opening. The insert extends in the axial direction beyond the section with the external thread into the front section. The diameter of the discharge channel is small, even at the distal end of the nozzle, compared to the length of the nozzle.

US 2011/125111 A1 offenbart eine Tube bzw. einen Drossseleinsatz gemäss Oberbegriffen von Ansprüchen 1 und 7 mit einem Vollkörper, dessen Profil kuppelartig ausgeformt ist. US 2011/125111 A1 discloses a tube or a choke insert according to the preamble of claims 1 and 7 with a solid body whose profile is dome-shaped.

Eine Aufgabe der vorliegenden Erfindung ist es, eine Tube mit einem Ausgabekanal und einem sicher in diesem Ausgabekanal befestigten Drosseleinsatz sowie einen Drosseleinsatz für eine solche Tube zu schaffen. Eine weitere Aufgabe der Erfindung ist es, ein Verfahren zum Befestigen des Drosseleinsatzes in der Tube anzugeben. Diese Aufgaben werden gelöst durch eine Tube gemäss den Merkmalen des Anspruchs 1, durch einen Drosseleinsatz für eine Tube gemäss den Merkmalen des Anspruchs 7 und durch ein Verfahren zum Befestigen eines Drosseleinsatzes im Ausgabekanal einer Tube gemäss den Merkmalen des Anspruchs 10.An object of the present invention is to provide a tube with an output channel and a throttle insert securely mounted in this output channel and a throttle insert for such a tube. Another object of the invention is to provide a method for attaching the throttle insert in the tube. These objects are achieved by a tube according to the features of claim 1, by a throttle insert for a tube according to the features of claim 7 and by a method for fixing a throttle insert in the output channel of a tube according to the features of claim 10.

Der vorzugsweise als Tube oder tubenartige Flasche ausgebildete Behälter umfasst ein Reservoir für ein fluides Medium und einen Stutzen mit einem Ausgabekanal, der eine Ausgabeöffnung mit dem Reservoir verbindet. Die Ausgabeöffnung ist an einem vorderen Abschnitt des Stutzens angeordnet, der auch als proximaler Abschnitt bezeichnet wird. Dieser proximale Abschnitt kann entsprechend der jeweiligen Anforderungen unterschiedlich ausgebildet sein und z.B. eine längliche konische Kanüle, einen Ringkörper mit einem kurzen Rohrabschnitt oder eine Scheibe mit einer zentralen Öffnung umfassen. Parameter wie Form, Grösse, Öffnungsquerschnitt, Material oder Oberflächenbeschaffenheit des proximalen Abschnitts können entsprechend der auszugebenden Flüssigkeit optimiert werden, sodass die Ausgabe von Tropfen einer gewünschten Grösse bzw. eines bestimmten Volumens begünstigt wird. In einem distalen Abschnitt umfasst der Stutzen vorzugsweise ein Aussengewinde zum Aufschrauben einer Schutzkappe, verbindlich jedoch zumindest eine allgemeine äussere Haltestruktur zum Befestigen einer solchen Schutzkappe. Der Ausgabekanal ist in diesem Bereich zumindest näherungsweise zylindrisch oder leicht konisch ausgebildet, wobei der Innendurchmesser axial in distaler Richtung gleich bleibt oder zunimmt. Das distale Ende des Stutzens ist über eine Tubenschulter mit einem Tubenmantel verbunden, der das Reservoir umschliesst. Ein im Wesentlichen als stopfenartiger Rotationskörper ausgebildeter Drosseleinsatz ist in den distalen Abschnitt des Stutzens eingefügt, wodurch der freie Querschnitt des Ausgabekanals verkleinert wird. Der Drosseleinsatz ist kuppelartig ausgebildet, vorzugsweise ein haubenartiges Spritzgiessteil. Solche Teile können effizient hergestellt und leicht in den Stutzen eingeführt werden. Zudem ist die zur Herstellung erforderliche Materialmenge im Vergleich zu einem Vollkörper gering.The container, preferably in the form of a tube or a tube-like bottle, comprises a reservoir for a fluid medium and a nozzle with an outlet channel which connects a dispensing opening to the reservoir. The dispensing opening is located at a forward portion of the neck, also referred to as a proximal portion. This proximal portion may be formed differently according to the respective requirements and include, for example, an elongated conical cannula, a ring body with a short tube section or a disc with a central opening. Parameters such as shape, size, opening area, material, or surface finish of the proximal portion may be optimized according to the fluid being dispensed so as to favor delivery of drops of a desired size or volume. In a distal portion of the neck preferably comprises an external thread for screwing on a protective cap, but binding at least one general outer support structure for securing such a protective cap. The output channel is at least approximately cylindrical or slightly conical in this area formed, wherein the inner diameter axially remains the same or increases in the distal direction. The distal end of the neck is connected via a tube shoulder with a tube jacket, which encloses the reservoir. A throttle insert formed essentially as a plug-like rotary body is inserted into the distal section of the nozzle, thereby reducing the free cross-section of the dispensing channel. The throttle insert is dome-shaped, preferably a hood-like injection molding. Such parts can be efficiently manufactured and easily inserted into the neck. In addition, the amount of material required for the production compared to a solid body is low.

In Verbindung mit der Innenwand des Stutzens bildet der Drosseleinsatz eine Schikane bzw. ein Hindernis für eine Flüssigkeit, die im Ausgabekanal vom Reservoir in Richtung der Ausgabeöffnung gefördert wird. Auf diese Weise kann der maximale Volumenstrom der Flüssigkeit, der bei einem bestimmten Überdruck im Reservoir gegenüber dem Umgebungsdruck vom Reservoir zur Ausgabeöffnung verdrängt wird, begrenzt bzw. gedrosselt werden. Dadurch kann bei der Ausgabeöffnung eine gleichmässige Tröpfchenbildung bei der Ausgabeöffnung sichergestellt werden. Bei einer Tube oder einer Flasche kann somit verhindert werden, dass ein zu grosser Flüssigkeitsstrom zum Beispiel strahlartig aus der Ausgabeöffnung herausgepresst wird, wenn der Tubenmantel stark zusammengedrückt wird.In conjunction with the inner wall of the nozzle, the throttle insert forms a baffle or obstruction to a liquid which is conveyed in the discharge channel from the reservoir in the direction of the discharge opening. In this way, the maximum volume flow of the liquid, which is displaced from the reservoir to the discharge opening at a certain overpressure in the reservoir relative to the ambient pressure, can be limited or throttled. This can be ensured at the discharge opening a uniform droplet formation at the discharge opening. In the case of a tube or a bottle, it is thus possible to prevent a flow of fluid which is too large, for example, being expelled from the delivery opening in the manner of a jet, when the tube jacket is strongly compressed.

Der Drosseleinsatz versperrt den Ausgabekanal mit Ausnahme eines oder mehrerer Drosselkanäle, die eine Engstelle im Ausgabekanal bilden.The throttle insert obstructs the dispensing channel with the exception of one or more throttle channels, which form a bottleneck in the dispensing channel.

Der Aussendurchmesser des Drosseleinsatzes ist im Bereich einer unteren bzw. distalen Aussenkante am grössten, wo eine äussere Mantelfläche und ein stirnseitiger Anschlagring des Drosseleinsatzes aufeinander treffen. Dieser Anschlagring hinterschneidet einen Absatz, der im distalen Abschnitt des Stutzens an dessen Innenwand ausgebildet ist. Der Absatz kann insbesondere einen an der Innenwand des Stutzens hervorragenden Ringwulst oder zumindest einen Abschnitt eines solchen Ringwulstes umfassen. Alternativ oder zusätzlich kann der Absatz auch einen Abschnitt der Grenzfläche einer ringförmigen Ausnehmung an der Innenwand des Stutzens umfassen.The outer diameter of the throttle insert is greatest in the region of a lower or distal outer edge, where an outer lateral surface and an end-face stop ring of the throttle insert meet one another. This stop ring undercuts a shoulder, which is formed in the distal portion of the nozzle on the inner wall. The shoulder may in particular comprise an annular bead projecting on the inner wall of the connecting piece or at least a portion of such an annular bead. Alternatively or additionally, the shoulder may also comprise a portion of the interface of an annular recess on the inner wall of the nozzle.

Ein solcher Absatz kann z.B. bereits bei der Herstellung des Stutzens bzw. des Tubenteils mit dem Stutzen als Spritzgiessteil vorgefertigt werden.Such a paragraph may e.g. be already prefabricated in the production of the nozzle or the tube part with the nozzle as injection molding.

Vorzugsweise wird der Absatz jedoch erst beim Einpressen des Drosseleinsatzes gebildet, wobei die Innenwand des Stutzens durch radial wirkende Druckkräfte, mit denen der Drosseleinsatz auf den Stutzen einwirkt, plastisch verformt wird und sich dadurch zumindest im Bereich des Anschlagrings an die Form des Drosseleinsatzes anpasst. Dieser Effekt wird begünstigt, wenn das Material des Drosseleinsatzes härter ist als jenes des Stutzens und sich beim Einpressen nicht oder nur unwesentlich plastisch verformt. So kann der Einsatz beispielsweise aus Polypropylen und der Tubenkopf aus Polyethylen, vorzugsweise HDPE gefertigt sein.Preferably, however, the shoulder is formed only when pressing in the throttle insert, wherein the inner wall of the nozzle is plastically deformed by radially acting pressure forces with which the throttle insert acts on the nozzle and thereby adapts to the shape of the throttle insert at least in the region of the stop ring. This effect is favored when the material of the throttle insert is harder than that of the nozzle and not or only slightly insignificant during pressing deformed. For example, the insert may be made of polypropylene and the tube head of polyethylene, preferably HDPE.

Vorzugsweise ist der Kantenwinkel, den die äussere Mantelfläche und der stirnseitige Anschlagring bei der Aussenkante einschliessen, 90° oder kleiner, und die Aussenkante ist vergleichsweise scharfkantig. Dadurch wird das Eindringen dieser Kante in den Stutzen und das Verdrängen von Material des Stutzens beim Einpressen begünstigt, sodass sich die Kante leicht mit dem Stutzen verkeilt und den Wiederaustritt des Drosseleinsatzes verhindert. Bei der Aussenkante hat der Anschlagring einen Steigungswinkel, der grösser oder gleich 0° ist. Dies ermöglicht eine besonders sichere formschlüssige Verbindung des Drosseleinsatzes mit dem Stutzen. Angrenzend an die untere Aussenkante umfasst die äussere Mantelfläche des Drosseleinsatzes einen distalen Abschnitt, dessen Steigungswinkel vorzugsweise im Wesentlichen dem Steigungswinkel der Innenwand des Stutzens an dieser Stelle entspricht. Im Falle einer zylindrischen Innenwand ist der Steigungswinkel somit zumindest näherungsweise 90°. Zusätzlich zum Formschluss kann so eine kraftschlüssige flächige Verbindung des Drosseleinsatzes mit dem Stutzen bewirkt werden. Vorzugsweise sind ein oder mehrere primäre Drosselkanäle entlang der Peripherie des Drosseleinsatzes angeordnet, wobei jeder dieser primären Drosselkanäle durch eine rinnenförmige Ausnehmung an der äusseren Mantelfläche des Drosseleinsatzes und durch die Innenwand des Stutzens begrenzt ist. Drosseleinsätze dieser Art können vergleichsweise einfach und kostengünstig in unterschiedlichen Varianten hergestellt werden. Bereits mit wenigen einfachen Änderungen des Werkzeugs für die Herstellung solcher Spritzgiessteile können zum Beispiel Anzahl, Anordnung, Form und Grösse solcher Drosselkanäle geändert werden. Die Herstellung entsprechender Werkzeuge ist ebenfalls vergleichsweise einfach und kostengünstig. Selbst Drosselkanäle, die eine Engstelle mit sehr kleiner Querschnittfläche bilden, lassen sich so problemlos herstellen. Durch die Höhe des distalen Abschnitts der Mantelfläche kann die Länge der primären Drosselkanäle vorgegeben werden. Ein längerer Drosselkanal bildet für die Flüssigkeit einen grösseren Strömungswiderstand. Innerhalb eines Drosselkanals kann der Strömungswiderstand weiter beeinflusst werden, indem z.B. eine oder mehrere Stufen die freie Querschnittfläche entlang des Strömungspfades verändern.Preferably, the edge angle, which enclose the outer lateral surface and the end-side stop ring at the outer edge, 90 ° or smaller, and the outer edge is comparatively sharp. This favors the penetration of this edge into the nozzle and the displacement of material of the nozzle during pressing, so that the edge easily wedged with the nozzle and prevents the re-emergence of the throttle insert. At the outer edge of the stop ring has a pitch angle which is greater than or equal to 0 °. This allows a particularly secure positive connection of the throttle insert with the nozzle. Adjacent to the lower outer edge, the outer lateral surface of the throttle insert comprises a distal portion whose pitch angle preferably corresponds substantially to the pitch angle of the inner wall of the nozzle at this point. In the case of a cylindrical inner wall, the pitch angle is thus at least approximately 90 °. In addition to the form-fitting, such a non-positive surface connection of the throttle insert with the neck can be effected. Preferably, one or more primary throttle passages are disposed along the periphery of the throttle insert, each of these primary throttle passages being separated by a groove-shaped recess on the outer surface of the throttle insert and is limited by the inner wall of the nozzle. Throttle inserts of this type can be produced relatively easily and inexpensively in different variants. Already with a few simple changes of the tool for the production of such injection-molded parts, for example, number, arrangement, shape and size of such throttle channels can be changed. The production of appropriate tools is also relatively easy and inexpensive. Even throttle channels, which form a bottleneck with a very small cross-sectional area, can be produced without problems. By the height of the distal portion of the lateral surface, the length of the primary throttle channels can be specified. A longer throttle channel forms a larger flow resistance for the liquid. Within a throttle channel, the flow resistance can be further influenced by, for example, one or more stages changing the free cross-sectional area along the flow path.

Angrenzend an den distalen Abschnitt umfasst die äussere Mantelfläche des Drosseleinsatzes vorzugsweise einen proximalen Abschnitt, der sich bis zu einer oberen bzw. proximalen Aussenkante hin kontinuierlich oder stufenweise verkleinert, sodass die Innenwand des Stutzens und die äussere Mantelfläche des Drosseleinsatzes einen Ringraum begrenzen, in den der bzw. die primären Drosselkanäle münden.Adjacent to the distal portion, the outer lateral surface of the throttle insert preferably comprises a proximal portion which continuously or stepwise decreases down to an upper or proximal outer edge, so that the inner wall of the nozzle and the outer surface of the throttle insert an annular space limit, in the open or the primary throttle channels.

Angrenzend an die proximale Aussenkante umfasst der Drosseleinsatz einen Deckabschnitt, der die Trennung des Ausgabekanals in einen der Ausgangsöffnung zugewandten proximalen Bereich und einen dem Reservoir zugewandten distalen Bereich vervollständigt.Adjacent to the proximal outer edge of the throttle insert comprises a cover portion, which completes the separation of the output channel in a proximal region facing the output port and a distal region facing the reservoir.

Der Drosseleinsatz bzw. dessen Deckabschnitt können mit einem ausreichend grossen Abstand zum proximalen Abschnitt des Stutzens angeordnet sein, sodass der proximale Abschnitt des Ausgabekanals zwischen dem Ringraum und der Ausgabeöffnung keine weiteren Engstellen mehr umfasst und Flüssigkeit ungehindert vom Ringraum zur Ausgabeöffnung gelangen kann.The throttle insert or its cover portion may be arranged with a sufficiently large distance from the proximal portion of the neck so that the proximal portion of the dispensing channel between the annulus and the dispensing opening no longer includes bottlenecks and liquid can pass unhindered from the annulus to the dispensing opening.

Der Deckabschnitt des Drosseleinsatzes umfasst einen scheiben- oder pfannenartig ausgebildeten zentralen Bereich und einen peripher angeordneten Kontaktring. Der Kontaktring ist ein ringförmiger Absatz, der am zentralen Bereich des Deckabschnitts axial hervorragt. Der Kontaktring grenzt an die proximale Aussenkante der Mantelfläche an und umfasst eine Stirnseite Kontaktfläche, die im montierten Zustand des Drosseleinsatzes vorzugsweise an der Innenseite des proximalen Abschnitts des Stutzens anliegt. Analog zu den primären Drosselkanälen sind an der Kontaktfläche eine oder mehrere Rinnen ausgenommen, die zusammen mit dem angrenzenden Teil des Stutzens ein oder mehrere sekundäre Drosselkanäle begrenzen. Der Deckabschnitt begrenzt zusammen mit dem distalen Abschnitt des Stutzens einen Ausgaberaum, dessen Grösse bzw. Volumen durch die Gestalt des Deckabschnitts, insbesondere durch die Grösse einer im Deckabschnitt geformten Pfanne, vorgegeben werden kann. Das so definierte Volumen kann beispielsweise als Hilfsmittel zum Dosieren einer auszugebenden Flüssigkeitsmenge verwendet werden, wobei zuerst durch Zusammendrücken des Tubenmantels bei aufrechter Tube das Pfannenvolumen mit Flüssigkeit gefüllt und anschliessend die in der Pfanne gesammelte Flüssigkeit durch Drehen der Tube ohne Druck auf den Tubenmantel tropfenweise durch die Ausgabeöffnung ausgegeben wird.The cover portion of the throttle insert comprises a disc-like or pan-shaped central region and a peripherally arranged contact ring. The contact ring is an annular shoulder that protrudes axially at the central portion of the deck portion. The contact ring adjoins the proximal outer edge of the lateral surface and comprises an end face contact surface, which preferably rests in the mounted state of the throttle insert on the inside of the proximal portion of the nozzle. Analogous to the primary throttle channels, one or more grooves are excluded at the contact surface, which together with the adjacent part of the nozzle one or more secondary throttle channels limit. The cover section delimits, together with the distal section of the neck, a dispensing space whose size or volume can be predetermined by the shape of the cover section, in particular by the size of a pan shaped in the cover section. The thus defined volume can be used, for example, as an aid for dosing a quantity of liquid to be dispensed, first by squeezing the tube shell in an upright tube filled the pan volume with liquid and then the liquid collected in the pan by rotating the tube without pressure on the tube coat dropwise through the Output port is issued.

Die sekundären Drosselkanäle können analog zu den primären Drosselkanälen zum weiteren Begrenzen des Volumenstroms der Flüssigkeit genutzt werden. Durch die Gestalt des Drosseleinsatzes können somit Parameter beeinflusst werden, die sich auf die Flüssigkeitssausgabe auswirken. Insbesondere können zum Beispiel Anzahl, Länge und Querschnitt der primären und sekundären Drosselkanäle sowie die Grössen des Ringraums und des Ausgaberaums entsprechend der auszugebenden Flüssigkeit angepasst werden.The secondary throttle channels can be used analogously to the primary throttle channels for further limiting the volume flow of the liquid. The shape of the throttle insert thus parameters can be influenced, which affect the liquid output. In particular, for example, the number, length and cross section of the primary and secondary throttle channels as well as the sizes of the annular space and the output space can be adjusted according to the liquid to be dispensed.

Drosseleinsätze können einfach mit unterschiedlichen Höhen und Aussendurchmessern hergestellt und somit für Tuben mit unterschiedlichen Ausgabestutzen optimiert werden. Falls der Formschluss des Drosseleinsatzes mit dem Ausgabestutzen durch radiales Verpressen dieser Teile erfolgt, können Werkzeuge, die zur Herstellung von Tubenteilen mit herkömmlichen Ausgabestutzen verwendet werden, unverändert auch zur Herstellung entsprechender Teile für die erfindungsgemässen Tuben genutzt werden. Vorzugsweise wird der Stutzen einer Tube als einstückiges Formteil gefertigt, welches auch die Tubenschulter umfasst. Der Tubenmantel ist beispielsweise aus einer Laminatfolie gefertigt, die die eine Sperrschicht aus Metall oder Kunststoff umfassen kann, zu einem Rohr geformt und mit der Tubenschulter verschweisst oder in sonstiger Weise verbunden wird.Throttle inserts can be easily manufactured with different heights and outside diameters and thus optimized for tubes with different dispensing nozzles. If the positive connection of the throttle insert with the Output spout is made by radial compression of these parts, tools that are used for the production of tubing parts with conventional dispensing nozzle, can be used unchanged for the production of corresponding parts for the inventive tubes. Preferably, the neck of a tube is made as a one-piece molding, which also includes the tube shoulder. The tube jacket is made, for example, from a laminate film, which may comprise a barrier layer made of metal or plastic, formed into a tube and welded to the tube shoulder or connected in any other way.

Bei der automatisierten Herstellung der Tube kann der Drosseleinsatz einfach von einem Greifer ergriffen und von der distalen Seite her in den Stutzen eingeführt werden, wo er in einer vorgegebenen axialen Lage mit dem Stutzen radial verpresst wird. Vorzugsweise umfasst der Drosseleinsatz für diesen Zweck einen zylindrischen oder leicht konischen Montagezapfen, der an der distalen Seite des Deckabschnitts axial hervorragt.In the automated production of the tube, the throttle insert can be easily grasped by a gripper and inserted from the distal side into the nozzle, where it is radially compressed in a predetermined axial position with the nozzle. Preferably, the throttle insert for this purpose comprises a cylindrical or slightly conical mounting pin which projects axially on the distal side of the cover portion.

Falls dies nicht bereits in einem vorhergehenden Prozessschritt gemacht wurde, kann die Tubenöffnung jetzt noch durch eine abnehmbare Schutzkappe verschlossen werden.If this has not already been done in a previous process step, the tube opening can now still be closed by a removable protective cap.

Derart vorbereitete Tuben können vor dem Befüllen mit der Flüssigkeit sterilisiert werden. Die verwendeten Materialien sind so gewählt, dass sie die dafür erforderlichen Umgebungsbedingungen wie z.B. hohe Temperaturen unbeschadet vertragen.Such prepared tubes can be sterilized before filling with the liquid. The materials used are chosen so that they are the ones required environmental conditions such as high temperatures unscathed tolerated.

Nach dem Befüllen mit der jeweiligen Flüssigkeit wird das offene distale Ende des Tubenmantels z.B. durch Verschweissen verschlossen.After filling with the respective fluid, the open distal end of the tube sheath is e.g. closed by welding.

Anhand einiger Figuren wird die Erfindung im Folgenden näher beschrieben. Dabei zeigen

Figur 1
einen Querschnitt einer ersten Tube mit einem ersten Drosseleinsatz im Bereich der Ausgabeöffnung,
Figur 2
eine Aufsicht des ersten Drosseleinsatzes,
Figur 3
einen Querschnitt des Drosseleinsatzes entlang der Linie A-A in Figur 2,
Figur 4
eine perspektivische Ansicht des ersten Drosseleinsatzes,
Figur 5
eine weitere perspektivische Ansicht des ersten Drosseleinsatzes,
Figur 6
einen Querschnitt einer zweiten Tube mit einem zweiten Drosseleinsatz im Bereich der Ausgabeöffnung,
Figur 7
einen Querschnitt einer dritten Tube mit einem dritten Drosseleinsatz im Bereich der Ausgabeöffnung,
Figur 8
einen Querschnitt einer vierten Tube mit einem vierten Drosseleinsatz im Bereich der Ausgabeöffnung.
Based on some figures, the invention will be described in more detail below. Show
FIG. 1
a cross section of a first tube with a first throttle insert in the region of the discharge opening,
FIG. 2
a top view of the first throttle insert,
FIG. 3
a cross section of the throttle insert along the line AA in FIG. 2 .
FIG. 4
a perspective view of the first throttle insert,
FIG. 5
another perspective view of the first throttle insert,
FIG. 6
a cross section of a second tube with a second throttle insert in the region of the discharge opening,
FIG. 7
a cross section of a third tube with a third throttle insert in the region of the discharge opening,
FIG. 8
a cross section of a fourth tube with a fourth throttle insert in the region of the discharge opening.

Figur 1 zeigt eine erste Ausführungsform einer Tube 1 mit einem Reservoir 3 für ein fluides bzw. flüssiges Medium, wobei das Reservoir 3 von einem Tubenmantel 5 ummantelt bzw. umschlossen ist. Der Tubenmantel 5 ist vorzugsweise aus einer mehrschichtigen Laminatfolie gefertigt, die mindestens eine Kunststoffschicht und vorzugsweise eine Sperrschicht aus Metall oder Kunststoff umfasst und zu einem Rohr geformt ist. Über eine Tubenschulter 7 ist ein vorderer Rand des Tubenmantels 5 mit einem distalen Abschnitt 9b eines rohrartigen Stutzens 9, der einen Ausgabekanal 13 bildet, verbunden. An einem proximalen Abschnitt 9a des Stutzens 9 ist eine Ausgabeöffnung 11 ausgebildet, die über den Ausgabekanal 13 mit dem Reservoir 3 verbunden ist. Der Stutzen 9 und die Tubenschulter 7 können als zusammenhängendes Spritzgiessteil gefertigt sein, das mit Ausnahme eines Aussengewindes 15 im distalen Abschnitt 9b des Stutzens 9 im Wesentlichen rotationssymmetrisch bezüglich einer Tubenachse X ist. Bei der Ausführungsform gemäss Figur 1 ist der proximale Abschnitt 9a des Stutzens 9 eine ringförmige Scheibe, deren zentrale Ausnehmung die Ausgabeöffnung 11 ist. Der Durchmesser D1 der Ausgabeöffnung 11 ist kleiner als der kleinste Innendurchmesser D2a des Ausgabekanals 13 im angrenzenden distalen Abschnitt 9b des Stutzens 9. Die ringförmige Scheibe bildet somit eine Anschlagfläche, die an der inneren Wandung des Stutzens 9 radial nach innen ragt. FIG. 1 shows a first embodiment of a tube 1 with a reservoir 3 for a fluid or liquid medium, wherein the reservoir 3 is surrounded by a tube jacket 5 or enclosed. The tube jacket 5 is preferably made of a multilayer laminate film comprising at least one plastic layer and preferably a barrier layer of metal or plastic and formed into a tube. Via a tube shoulder 7, a front edge of the tube jacket 5 is connected to a distal portion 9b of a tubular neck 9, which forms an output channel 13. At a proximal portion 9 a of the nozzle 9, an output port 11 is formed, which is connected via the output channel 13 to the reservoir 3. The nozzle 9 and the tube shoulder 7 can be made as a continuous injection molded part, which is substantially rotationally symmetrical with respect to a tube axis X with the exception of an external thread 15 in the distal portion 9b of the nozzle 9. In the embodiment according to FIG. 1 the proximal portion 9a of the neck 9 is an annular disc whose central recess is the dispensing opening 11. The diameter D1 of the discharge opening 11 is smaller than the smallest inner diameter D2a of the discharge channel 13 in the adjacent distal portion 9b of the nozzle 9. The annular disc thus forms a stop surface which projects radially inwards on the inner wall of the nozzle 9.

Diese innere Wandung hat bezüglich einer Normalebene zur Tubenachse X einen Neigungswinkel α, der z.B. im Bereich von 75° bis 90° liegen kann.This inner wall has, with respect to a normal plane to the tube axis X, an inclination angle α, e.g. may be in the range of 75 ° to 90 °.

Ein Drosseleinsatz 31, der in den Figuren 2 bis 4 genauer dargestellt ist, ist so in den Ausgabekanal 13 eingesetzt, dass er einen kleinen Abstand S1 zur ringförmigen Scheibe bzw. zur Anschlagfläche des proximalen Abschnitts 9a des Stutzens 9 aufweist, wobei dieser Abstand S1 vorzugsweise im Bereich von 0 bis 1mm liegt. Der Drosseleinsatz 31 umfasst im Wesentlichen einen kuppel- oder haubenartigen Rotationskörper mit einer äusseren Mantelfläche 33, die sich von einer unteren bzw. distalen Aussenkante 35 mit einem maximalen Durchmesser D3a über eine Höhe H bis zu einer oberen bzw. proximalen Aussenkante 37 mit einem Durchmesser D3b erstreckt, wobei D3b kleiner ist als D3a. Die Mantelfläche 33 hat bezüglich einer Normalebene zur Achse Y des Drosseleinsatzes 31 bei der distalen Aussenkante 35 einen Neigungswinkel β1 und bei der proximalen Aussenkante 37 einen Neigungswinkel β2, wobei β1>= β2. Dazwischen kann sich der Steigungswinkel der Mantelfläche 33 kontinuierlich oder stufenweise ändern. Alternativ oder zusätzlich könnte sich auch der Aussendurchmesser der Mantelfläche 33 entlang der Höhe H mit einer oder mehreren Stufen verkleinern. Angrenzend an die proximale Aussenkante 37 ist der Aussendurchmesser des Drosseleinsatzes 31 kleiner als bei der distalen Aussenkante 35.A throttle insert 31, which in the FIGS. 2 to 4 is shown in detail, is inserted into the output channel 13 that it has a small distance S1 to the annular disc or the abutment surface of the proximal portion 9a of the nozzle 9, said distance S1 is preferably in the range of 0 to 1mm. The throttle insert 31 essentially comprises a dome-shaped or hood-like rotational body with an outer lateral surface 33 which extends from a lower or distal outer edge 35 with a maximum diameter D3a over a height H to an upper or proximal outer edge 37 with a diameter D3b extends, D3b is smaller than D3a. The lateral surface 33 has an inclination angle β1 with respect to a normal plane to the axis Y of the throttle insert 31 at the distal outer edge 35 and an inclination angle β2 at the proximal outer edge 37, where β1> = β2. In between, the pitch angle of the lateral surface 33 may change continuously or stepwise. Alternatively or additionally, the outer diameter of the lateral surface 33 along the height H could shrink with one or more steps. Adjacent to the proximal outer edge 37 is the outer diameter of the Throttle insert 31 smaller than at the distal outer edge 35th

Vorzugsweise entsprechen der Neigungswinkel β1 und der Aussendurchmesser D3 bei der distalen Aussenkante 35 und bei einem daran angrenzenden distalen Abschnitt 9b des Drosseleinsatzes 31 dem Neigungswinkel α und dem Innendurchmesser D2 des angrenzenden distalen Abschnitts 9b des Stutzens 9.Preferably, the angle of inclination β1 and the outer diameter D3 at the distal outer edge 35 and at an adjoining distal portion 9b of the throttle insert 31, the inclination angle α and the inner diameter D2 of the adjacent distal portion 9b of the nozzle 9th

Dies gilt insbesondere dann, wenn ein Drosseleinsatz 31 radial mit dem Stutzen 9 verpresst ist. Beim Einpressen des Drosseleinsatzes 31 wird die Innenwand des Stutzens 9 plastisch verformt und im distalen Abschnitt 9b an die Aussenkontur des Drosseleinsatzes 31 angepasst. Auf diese Weise wird auch ein ringförmiger Absatz 17a an der Innenwand des Stutzens 9 geformt, dessen äusserer Durchmesser dem maximalen Aussendurchmesser D3a des Drosseleinsatzes 31 entspricht. Dieser ringförmige Absatz 17a kann vergleichsweise schmal sein und weist vorzugsweise eine Breite auf, die in der Grössenordnung von 0.1mm bis 0.6mm, insbesondere von 0.1mm bis 0.2mmliegt. Der ringförmige Absatz 17a ist der unterste Abschnitt bzw. ein distaler Endabschnitt einer ringförmigen Ausnehmung 17, welche der distale Abschnitt 9b des Drosseleinsatzes 31 beim Einpressen in die zylindrische oder konische Innenwandung des Stutzens 9 verursacht. Beim Einpressen des Drosseleinsatzes 31 in den Ausgabekanal 13 spreizt dieser aufgrund des grösseren Aussendurchmessers D3a die Wandung des Stutzens 9 und zieht sich hinter der distalen Aussenkante 35 teilweise wieder zusammen.This is especially true when a throttle insert 31 is pressed radially with the nozzle 9. When pressing in the throttle insert 31, the inner wall of the nozzle 9 is plastically deformed and adapted in the distal portion 9 b to the outer contour of the throttle insert 31. In this way, an annular shoulder 17a is formed on the inner wall of the nozzle 9, whose outer diameter corresponds to the maximum outer diameter D3a of the throttle insert 31. This annular shoulder 17a may be comparatively narrow and preferably has a width which is of the order of 0.1 mm to 0.6 mm, in particular from 0.1 mm to 0.2 mm. The annular shoulder 17 a is the lowermost portion or a distal end portion of an annular recess 17, which causes the distal portion 9 b of the throttle insert 31 when pressed into the cylindrical or conical inner wall of the nozzle 9. When pressing the throttle insert 31 in the Output channel 13 spreads this due to the larger outer diameter D3a the wall of the nozzle 9 and retracts behind the distal outer edge 35 partially together again.

Bei der distalen Aussenkante 35 umfasst der Drosseleinsatz 31 einen an die Mantelfläche 33 angrenzenden stirnseitigen Anschlagring 39, der vorzugsweise in einer Orthogonalebene zur Achse Y des Drosseleinsatzes 31 liegt oder alternativ einen Neigungswinkel zwischen 0° und etwa 60° aufweisen kann (nicht dargestellt). Zur Achse Y hin ist radial angrenzend an den inneren Rand des Anschlagrings 39 ein ringförmiger Hohlraum 41 aus dem Körper des Drosseleinsatzes 31 ausgenommen. Dies bewirkt gegenüber einem Vollkörper eine Materialeinsparung und eine gleichmässigere Materialstärke, was für die effiziente Herstellung eines Spritzgiessteils vorteilhaft ist. Dies ist insbesondere wesentlich für die Herstellung von Drosseleinsätzen mit vergleichsweise grossen Aussendurchmessern. Im Weiteren kann zum Einpressen des Drosseleinsatzes 31 in den Stutzen 9 ein Werkzeug bzw. ein Stempel in den Hohlraum 41 eingeführt werden, der an der Innenwand des Drosseleinsatzes 31 anliegt und das radiale Einpressen des Drosseleinsatzes 31 in die Innenwand des Stutzens 9 begünstigt.In the case of the distal outer edge 35, the throttle insert 31 comprises an end stop ring 39 adjoining the lateral surface 33, which preferably lies in an orthogonal plane to the axis Y of the throttle insert 31 or alternatively may have an inclination angle between 0 ° and approximately 60 ° (not shown). Toward the axis Y, radially adjacent to the inner edge of the stop ring 39, an annular cavity 41 is excluded from the body of the throttle insert 31. This brings about a solid body material savings and a more uniform material thickness, which is advantageous for the efficient production of an injection molded part. This is particularly important for the production of throttle inserts with comparatively large outside diameters. Furthermore, for pressing the throttle insert 31 into the nozzle 9, a tool or a punch can be introduced into the cavity 41, which rests against the inner wall of the throttle insert 31 and favors the radial insertion of the throttle insert 31 into the inner wall of the nozzle 9.

An einer Basisscheibe 43, die den Hohlraum 41 stirnseitig begrenzt ragt in distaler Richtung ein vorzugsweise zylindrischer oder leicht konischer axialer Montagezapfen 45 hervor, vorzugsweise über die Ebene der distalen Aussenkante 35 hinaus.A preferably cylindrical or slightly conical axial mounting pin protrudes in the distal direction on a base plate 43 which delimits the cavity 41 at the end 45, preferably beyond the plane of the distal outer edge 35 addition.

Entlang der Peripherie des Drosseleinsatzes 31 ist ein rinnenartiger primärer Drosselkanal 47 in die Mantelfläche 33 eingelassen, dessen distales Ende im stirnseitigen Anschlagring 39 mündet und dessen proximales Ende im proximalen Abschnitt der Mantelfläche 33 mündet, wo der Aussendurchmesser D3 der Mantelfläche 33 zum Begrenzen des Ringraums 19 kleiner ist. Die Tiefe S2 des primären Drosselkanals 47 und der Radius R1 des Drosseleinsatzes 31 im Bereich des primären Drosselkanals 47 sind so bemessen, dass, wenn der Drosseleinsatz 31 in den Stutzen 9 eingesetzt ist, an beiden Enden des primären Drosselkanals 47 eine Durchgangsöffnung für den Durchtritt von Flüssigkeit aus dem Reservoir 3 in den Ringraum 19 frei bleibt. Der Querschnitt dieser Durchgangsöffnungen kann entsprechend der auszugebenden Flüssigkeit und der jeweiligen Gestalt des Stutzens 9 optimiert werden.Along the periphery of the throttle insert 31, a groove-like primary throttle channel 47 is embedded in the lateral surface 33, the distal end of the end stop ring 39 opens and its proximal end opens in the proximal portion of the lateral surface 33, where the outer diameter D3 of the lateral surface 33 for limiting the annulus 19th is smaller. The depth S2 of the primary throttle channel 47 and the radius R1 of the throttle insert 31 in the region of the primary throttle channel 47 are dimensioned so that when the throttle insert 31 is inserted into the nozzle 9, at both ends of the primary throttle channel 47 has a passage opening for the passage of Liquid from the reservoir 3 in the annular space 19 remains free. The cross section of these passage openings can be optimized according to the dispensed liquid and the respective shape of the nozzle 9.

Da zumindest der distale Bereich von Stutzen 9 diverser Tuben standardisiert ist, kann eine Vielzahl unterschiedlicher Tuben mit vergleichsweise wenigen Ausführungsformen des Drosseleinsatzes 31 ausgerüstet werden. Da der Drosseleinsatz 31 im Inneren des Stutzens 9 in den Ausgabekanal 13 eingesetzt ist, können bei solchen Tuben auch standardisierte Verschlüsse verwendet werden. Bei der proximalen Aussenkante 37 grenzt ein stirnseitiger Deckabschnitt 50 des Drosseleinsatzes 31 mit einem peripheren Kontaktring 49 an die Mantelfläche 33 an. Der zentrale Bereich des Deckabschnitts 50 ist scheibenartig oder als pfannenartige Vertiefung 53 ausgebildet. Analog zu den primären Drosselkanälen 47 sind am Kontaktring 49 eine oder mehrere Rinnen ausgenommen, die dazu vorgesehen sind, zusammen mit dem angrenzenden Teil des Stutzens 9 ein oder mehrere sekundäre Drosselkanäle 51 zu begrenzen, wenn der Kontaktring 49 im proximalen Abschnitt 9a an der Innenseite des Stutzens 9 anliegt bzw. in Kontakt mit dieser Innenseite ist. Die Enden dieser sekundären Drosselkanäle 51 münden in den Ringraum 19 und in einen Ausgaberaum 55, der mit der Ausgabeöffnung 11 verbunden ist, und der durch den proximalen Abschnitt 9a des Stutzens 9 und durch den Deckabschnitt 50 des Drosseleinsatzes 31 begrenzt ist. Falls der Deckabschnitt 50 angrenzend an den Kontaktring 49 eine Vertiefung 53 aufweist, kann diese zum Dosieren einer bestimmten Menge der auszugebenden Flüssigkeit verwendet werden. Bei aufrecht gehaltener Tube 1 wird zuerst durch Zusammendrücken des Reservoirs 3 Flüssigkeit in die Pfanne 53 gefördert, bis diese voll ist. Falls der Flüssigkeitspegel den Rand des Kontaktrings 49 übersteigt, kann die überschüssige Flüssigkeit durch einen Unterdruck im Reservoir 3, der durch die elastische Rückstellkraft des Tubenmantels 5 verursacht wird, wieder ins Reservoir 3 zurückgesogen werden.Since at least the distal region of nozzle 9 of various tubes is standardized, a multiplicity of different tubes can be equipped with comparatively few embodiments of the throttle insert 31. Since the throttle insert 31 is inserted in the interior of the nozzle 9 in the output channel 13, standardized closures can be used in such tubes and. At the proximal outer edge 37, an end-side cover section 50 of the throttle insert 31 adjoins with a peripheral contact ring 49 to the lateral surface 33 at. The central region of the cover section 50 is disc-shaped or designed as a socket-like depression 53. Analogous to the primary throttle channels 47, one or more grooves are provided on the contact ring 49, which are intended to limit one or more secondary throttle channels 51 together with the adjacent part of the neck 9, if the contact ring 49 in the proximal portion 9a on the inside of the Stutzens 9 is in contact or in contact with this inside. The ends of these secondary throttle channels 51 open into the annular space 19 and into an output space 55 which is connected to the discharge opening 11 and which is bounded by the proximal portion 9 a of the nozzle 9 and by the cover portion 50 of the throttle insert 31. If the cover portion 50 adjacent to the contact ring 49 has a recess 53, this can be used for dosing a certain amount of liquid to be dispensed. When tube 1 is held upright, liquid 3 is first conveyed into pan 53 by squeezing reservoir 3 until it is full. If the liquid level exceeds the edge of the contact ring 49, the excess liquid can be sucked back into the reservoir 3 by a negative pressure in the reservoir 3, which is caused by the elastic restoring force of the tube jacket 5.

Wie in Figur 1 gezeigt, kann der Drosseleinsatz 31 axial so im Stutzen 9 angeordnet sein, dass er nicht direkt am proximalen Abschnitt 9a des Stutzens 9 anliegt, sodass zwischen dem Kontaktring 49 und dem proximalen Abschnitt 9a des Stutzens 9 ein ringförmiger Spalt frei bleibt. Dieser Spalt verbindet den Ringraum 19 zusätzlich oder alternativ zu den sekundären Drosselkanälen 51 mit dem Ausgaberaum 55. Durch die Spaltbreite S1 und die Querschnittfläche des oder der sekundären Drosselkanäle 51 kann der Strömungswiderstand, den der Drosseleinsatz 31 einer bestimmten Flüssigkeit entgegensetzt, wenn diese aus dem Reservoir 3 zur Ausgabeöffnung 11 hin verdrängt wird, zusätzlich beeinflusst werden.As in FIG. 1 9, the throttle insert 31 can be arranged axially in the neck 9 such that it does not bear directly on the proximal portion 9a of the neck 9, so that an annular gap remains free between the contact ring 49 and the proximal portion 9a of the neck 9. This gap connects the annulus 19, in addition or as an alternative to the secondary throttle channels 51, to the dispensing space 55. The gap width S1 and the cross-sectional area of the secondary orifice 51 may have the flow resistance that the throttling insert 31 opposes to a particular liquid as it exits the reservoir 3 is displaced to the discharge opening 11, additionally influenced.

Bei einer Ausführungsform der Tube 1 gemäss Figur 1 ist das Aussengewinde 15 ein M9x1.5 - Gewinde. Der entsprechende Drosseleinsatz 31 hat einen maximalen Aussendurchmesser D3a von 5,5 mm und eine Höhe H von 3,2 mm. Die Anzahl primärer Drosselkanäle 47 ist 1 und die Anzahl sekundärer Drosselkanäle 51 ist 3, wobei alle Drosselkanäle 47, 51 gleichmässig verteilt mit Winkelabständen von 90° am Drosseleinsatz 31 angeordnet sind. Die Erfindung schliesst auch andere Ausführungsformen der Tube 1 und/oder des Drosseleinsatzes 31 mit ein, bei denen insbesondere die Anzahl, die Anordnung, die Querschnitte, und die Gestalt der primären Drosselkanäle 47 und/oder der sekundären Drosselkanäle 51 unterschiedlich sein kann. Vorzugsweise sind primäre Drosselkanäle 47 und sekundäre Drosselkanäle 51 versetzt zueinander angeordnet. Dies begünstigt eine weitere Erhöhung des Strömungswiderstandes.In one embodiment of the tube 1 according to FIG. 1 the external thread 15 is a M9x1.5 thread. The corresponding throttle insert 31 has a maximum outer diameter D3a of 5.5 mm and a height H of 3.2 mm. The number of primary throttle channels 47 is 1 and the number of secondary throttle channels 51 is 3, wherein all the throttle channels 47, 51 evenly distributed with angular intervals of 90 ° at the throttle insert 31 are arranged. The invention also includes other embodiments of the tube 1 and / or the throttle insert 31, in which in particular the number, the arrangement, the cross sections, and the shape of the primary throttle channels 47 and / or the secondary throttle channels 51 may be different. Preferably, primary Throttle channels 47 and secondary throttle channels 51 offset from each other. This favors a further increase in the flow resistance.

Die Figuren 6, 7, und 8 zeigen weitere Ausführungsformen von Tuben 1 mit Drosseleinsätzen 31.The FIGS. 6, 7, and 8 show further embodiments of tubes 1 with throttle inserts 31.

Bei einer Tube 1 gemäss Figur 6 umfasst der proximale Abschnitt 9a des Stutzens 9 eine leicht konische Kanüle 10, an deren schmalerem Ende die Ausgabeöffnung 11 angeordnet ist, und deren breiteres Ende über einen Ringflansch 12 mit dem distalen Abschnitt 9b des Stutzens 9 verbunden ist. Bei der in Figur 6 dargestellten Ausführungsform der Tube 1 ist das Aussengewinde 15 ein M11x1.5 - Gewinde. Der Drosseleinsatz 31 hat einen maximalen Aussendurchmesser D3a von 7.2 mm und eine Höhe H von 3,6 mm. Im Vergleich zur Ausführungsform des Drosseleinsatzes 31 gemäss Figur 3 ist der Kontaktring 49 breiter. Der Durchmesser der Pfanne 53 ist vergleichsweise klein und die sekundären Drosselkanäle 51 erstrecken sich radial zur Tubenachse X hin über den Innenrand des Ringflansches 12 hinaus, sodass die in den Ausgaberaum 55 mündenden Enden nicht mehr vom Ringflansch 12 überdeckt sind.In a tube 1 according FIG. 6 The proximal portion 9a of the neck 9 comprises a slightly conical cannula 10, at the narrower end of which the delivery opening 11 is arranged, and whose broader end is connected via an annular flange 12 to the distal portion 9b of the neck 9. At the in FIG. 6 illustrated embodiment of the tube 1, the external thread 15 is a M11x1.5 - thread. The throttle insert 31 has a maximum outer diameter D3a of 7.2 mm and a height H of 3.6 mm. Compared to the embodiment of the throttle insert 31 according to FIG. 3 the contact ring 49 is wider. The diameter of the pan 53 is comparatively small and the secondary throttle channels 51 extend radially to the tube axis X out beyond the inner edge of the annular flange 12, so that the opening into the discharge chamber 55 ends are no longer covered by the annular flange 12.

Der in Figur 7 dargestellte weitere Tuben 1 umfasst ein M22x1.5 - Aussengewinde 15. Der Drosseleinsatz 31 hat einen maximalen Aussendurchmesser D3a von 18.3 mm und eine Höhe H von 5.3 mm. Im Vergleich zur Ausführungsform des Drosseleinsatzes 31 gemäss Figur 3 ist der Aussendurchmesser D3a im Vergleich zur Höhe H deutlich grösser. Der Kontaktring 49 ist ein vergleichsweise schmaler Ring, dessen Breite und dessen Höhe z.B. zwischen 0 und 1mm liegen können. Entsprechend kurz sind die sekundären Drosselkanäle 51. Die Pfanne 53 im Deckabschnitt 50 umfasst angrenzend an den Kontaktring 49 einen Aussenring 53a bzw. eine erste ringförmige Stufe, die im Wesentlichen auf dem Grundniveau des Kontaktrings 49 liegt. Der Aussenring 53a ist ein flanschartiger Rand einer Innenpfanne 53b, deren Boden auf einem deutlich tieferen Niveau zwischen jenem der distalen Aussenkante 35 und des Aussenrings 53a liegt. Der innere Rand des Aussenrings 53a hat einen grösseren Radius als die Ausgabeöffnung 11, sodass der Aussenring 53 vom proximalen Abschnitt 9a des Stutzens 9 vollständig überdeckt ist.The in FIG. 7 shown further tubes 1 comprises a M22x1.5 - external thread 15. The throttle insert 31 has a maximum outer diameter D3a of 18.3 mm and a height H of 5.3 mm. Compared to the embodiment of the Throttle insert 31 according to FIG. 3 is the outer diameter D3a compared to the height H significantly larger. The contact ring 49 is a comparatively narrow ring whose width and height can be between 0 and 1 mm, for example. Correspondingly short are the secondary throttle channels 51. The pan 53 in the cover section 50 comprises, adjacent to the contact ring 49, an outer ring 53a or a first annular step, which lies substantially at the base level of the contact ring 49. The outer ring 53a is a flange-like edge of an inner socket 53b, the bottom of which lies at a significantly lower level between that of the distal outer edge 35 and the outer ring 53a. The inner edge of the outer ring 53a has a larger radius than the discharge opening 11, so that the outer ring 53 is completely covered by the proximal portion 9a of the nozzle 9.

Bei der in Figur 8 dargestellten weiteren Tube 1 ist der proximale Abschnitt 9a des Stutzens 9 als an den distalen Abschnitt 9b angrenzender ringförmiger Kragen ausgebildet, dessen innerer Rand ein Rohrabschnitt 21 ist, dessen proximales Ende die Ausgabeöffnung 11 definiert.At the in FIG. 8 1, the proximal portion 9a of the neck 9 is formed as an annular collar adjoining the distal portion 9b, the inner edge of which is a tubular portion 21, the proximal end of which defines the dispensing opening 11.

Die Form und Grösse des Drosseleinsatzes 31 ist so auf die Gestalt des Stutzens 9 abgestimmt, dass der distale Endbereich des Rohrabschnitts 21 in die Pfanne 53 eingetaucht ist bzw. den Rand der Pfanne 53 axial überlappt, derart, dass die Innenwand der Pfanne 53 und der Endbereich des Rohrabschnitts 21 einen Ringspalt 23 bilden, der den Ringraum 19 mit dem Ausgaberaum 55 verbindet. Der Rohrabschnitt 21 kann wie in Figur 8 dargestellt aussen angefast sein. Die Pfannenwand ist entsprechend geneigt. Alternativ oder zusätzlich zu einer oder mehreren stirnseitig am Kontaktring 49 angeordneten sekundären Drosselkanälen 51 können diese in analoger Weise auch an der Innenwand der Pfanne 53 angeordnet sein. Dies hat den Vorteil, dass auch dann, wenn die Innenwand der Pfanne 53 am Rohrabschnitt 21 anliegt, mindestens die freie Querschnittfläche der sekundären Drosselkanäle 51 für den Durchtritt von Flüssigkeit frei bleibt.The shape and size of the throttle insert 31 is matched to the shape of the nozzle 9, that the distal end portion of the tube section 21 is immersed in the pan 53 and axially overlaps the edge of the pan 53, such that the inner wall of the pan 53 and the end region of the pipe section 21 form an annular gap 23 which connects the annular space 19 with the discharge space 55. The pipe section 21 may, as in FIG. 8 be chalked outside. The pan wall is inclined accordingly. Alternatively or in addition to one or more end faces on the contact ring 49 arranged secondary throttle channels 51, these may be arranged in an analogous manner on the inner wall of the pan 53. This has the advantage that even if the inner wall of the pan 53 rests against the pipe section 21, at least the free cross-sectional area of the secondary throttle channels 51 remains free for the passage of liquid.

Koaxial zum Montagezapfen 45 ragt an der Innenseite der Pfanne 53 ein Tropfzapfen 46 in das distale Ende des Rohrabschnitts 21 hinein. Die Ausbildung von Tropfen der auszugebenden Flüssigkeit kann durch Eigenschaften des Rohrabschnitts 21 und des Drosseleinsatzes 31, insbesondere auch des Tropfzapfens 46, beeinflusst werden. Nebst geometrischen Eigenschaften haben insbesondere Oberflächeneigenschaften wie Rauigkeit und Oberflächenspannung einen wesentlichen Einfluss auf die Art der Tropfenbildung.Coaxial with the mounting pin 45 protrudes on the inside of the pan 53, a drip tap 46 into the distal end of the pipe section 21 into it. The formation of drops of the liquid to be dispensed can be influenced by properties of the pipe section 21 and of the throttle insert 31, in particular also of the dripping pin 46. In addition to geometric properties, in particular surface properties such as roughness and surface tension have a significant influence on the type of droplet formation.

Claims (10)

  1. A tube (1), comprising a reservoir (3) for a fluid medium and a connecting piece (9) having a dispensing duct (13) which connects a dispensing opening (11) to the reservoir (3), wherein the dispensing opening (11) is arranged on a proximal portion (9a) of the connecting piece (9), and wherein a distal portion (9b) of the connecting piece (9) comprises an outer retaining structure for fastening a protective cap and is connected by means of a tube shoulder to a tube casing (5) which encloses the reservoir (3), wherein a throttle insert (31) is arranged in the dispensing duct (13) such that it forms a constriction in the dispensing duct (13), which constriction seals the dispensing duct (13) with the exception of at least one primary throttle duct (47), characterised in that the throttle insert (31) is configured like a dome, wherein an outer casing surface (33) and a stop ring (39) on the front side meet one another at a distal outer edge (35), wherein an annular hollow space (41) is removed from the body of the throttle insert radially adjacent to the inner edge of the stop ring (39) and in that the throttle insert (31) is positively fastened in the connecting piece (9), wherein the stop ring (39) has an undercut with an annular step (17a) configured in the distal portion (9b) on the inner wall of the connecting piece (9).
  2. The tube (1) according to Claim 1, characterised in that the annular step (17a) is a distal end portion of an annular recess (17) on the inner wall of the connecting piece (9).
  3. The tube (1) according to any one of Claims 1 or 2, characterised in that the connecting piece (9) and the throttle insert (31) are produced from different plastics, and the material of the throttle insert (31) is harder than the material of the connecting piece (9).
  4. The tube (1) according to any one of Claims 1 to 3, characterised in that the outer casing surface (33) of the throttle insert (31) extends from the distal outer edge (35) up to a proximal outer edge (37), wherein the diameter (D3a) at the distal outer edge (35) is greater than the diameter (D3b) at the proximal outer edge (37), in that a distal portion of the casing surface (33) adjacent to the distal outer edge (35) of the throttle insert (31) lies in close contact with the inner wall of the connecting piece (9), and in that the proximal portion of the casing surface (33) adjacent to the proximal outer edge (37) is arranged radially at a distance from the inner wall of the connecting piece (9), such that said inner wall and the proximal portion of the casing surface (33) delimit an annular space (19) located therebetween.
  5. The tube (1) according to any one of Claims 1 to 4, characterised in that the primary throttle duct (47) is delimited by a channel-shaped recess on the outer casing surface (33) of the throttle insert (31) and by the inner wall of the connecting piece (9), and in that the primary throttle duct (47) has a first orifice at the stop ring (39) on the front side and a second orifice in the casing surface (33).
  6. The tube (1) according to any one of Claims 4 or 5, characterised in that the throttle insert (31) comprises a top portion (50) on the front side having a central region and an axially protruding peripheral contact ring (49), wherein in order to connect the annular space (19) to a dispensing chamber (55) connected to the dispensing opening (11)
    a) the contact ring (49) is arranged at a distance (S1) from a neighbouring stop surface of the proximal portion (9a) of the connecting piece (9), and/or
    b) the contact ring (49) comprises at least one secondary throttle duct (51).
  7. A throttle insert (31) for use in a tube (1) according to any one of Claims 1 to 6, comprising a rotational body in the outer casing surface (33) whereof a channel-shaped recess is removed as a delimitation for a primary throttle duct (47), characterised in that it comprises a dome-like rotational body having an outer casing surface (33) and a stop ring (39), wherein the casing surface (33) extends from a distal outer edge (35) having a maximum diameter (D3a) up to a proximal outer edge (37) having a smaller outer diameter (D3b), and wherein the stop ring (39) is adjacent to the distal outer edge (35) on the front side, wherein an annular hollow space (41) is removed from the body of the throttle insert radially adjacent to the inner edge of the stop ring (39), and wherein the channel-shaped recess extends from an orifice in the stop ring (39) up to an orifice in the casing surface (33).
  8. The throttle insert (31) according to Claim 7, characterised in that the annular hollow space (41) is delimited on the front side by a base plate (43) and internally by a mounting pin (45) projecting on the base plate (43) in a distal direction.
  9. The throttle insert (31) according to any one of Claims 7 or 8, characterised in that the rotational body comprises a top portion (50) on the front side with a peripheral contact ring (49) adjacent to the proximal outer edge (37), the top portion (50) is configured in the form of a disc or has a pan-like cavity (53), and at least one channel is removed as a delimitation of a secondary throttle duct (51) on the contact ring (49).
  10. A method for manufacturing a tube (1), which comprises a reservoir (3) for a fluid medium and a connecting piece (9) having a dispensing duct (13), wherein the dispensing duct (13) connects a dispensing opening (11) on a proximal portion (9a) of the connecting piece (9) to the reservoir (3), and wherein a distal portion (9b) of the connecting piece (9) comprises an outer retaining structure for fastening a protective cap and is connected by means of a tube shoulder to a tube casing (5), which encloses the reservoir (3), characterised in that a dome-like throttle insert (31) according to any one of Claims 7-9 having a rotational body, the outer diameter of which is largest at a distal outer edge (35), where an outer casing surface (33) and a stop ring (39) on the front side meet one another, is introduced from the distal end of the connecting piece (9) into the connecting piece (9), and in that the throttle insert (31) is positively connected to the connecting piece (9) by an undercut of the stop ring (39) with an annular step (17a) on the inner wall of the connecting piece (9) in the distal portion (9b) and is arranged in the dispensing duct (13) such that it forms a constriction in the dispensing duct (13), which constriction seals the dispensing duct (13) with the exception of at least one primary throttle duct (47).
EP17165003.9A 2016-05-03 2017-04-05 Tube with throttle insert Active EP3241781B1 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
PL17165003T PL3241781T3 (en) 2016-05-03 2017-04-05 Tube with throttle insert

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CH00585/16A CH712432A1 (en) 2016-05-03 2016-05-03 Tube with throttle insert.

Publications (2)

Publication Number Publication Date
EP3241781A1 EP3241781A1 (en) 2017-11-08
EP3241781B1 true EP3241781B1 (en) 2019-02-06

Family

ID=58530390

Family Applications (1)

Application Number Title Priority Date Filing Date
EP17165003.9A Active EP3241781B1 (en) 2016-05-03 2017-04-05 Tube with throttle insert

Country Status (6)

Country Link
US (1) US10093461B2 (en)
EP (1) EP3241781B1 (en)
CA (1) CA2965227C (en)
CH (1) CH712432A1 (en)
ES (1) ES2721772T3 (en)
PL (1) PL3241781T3 (en)

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Publication number Priority date Publication date Assignee Title
CH710688A1 (en) 2015-02-02 2016-08-15 Götschi Rudolf Anti-drip device.
KR102076658B1 (en) * 2019-05-31 2020-02-13 임종수 A discharge device for discharging the liquid content in the tube container in a droplet form
KR102279627B1 (en) * 2021-03-02 2021-07-21 한국콜마주식회사 Container
EP4302638A1 (en) 2021-03-02 2024-01-10 Kolmar Korea Co., Ltd. Container for contents

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US772707A (en) * 1902-07-10 1904-10-18 Marten Elfstrand Drop-stopper for bottles or the like.
US1760773A (en) * 1928-09-29 1930-05-27 Clarence J Penney Container or tube for dentifrice
US2249832A (en) * 1937-05-07 1941-07-22 Hubschman Jacob Dispensing device
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US2657836A (en) * 1952-12-22 1953-11-03 Hoegermeyer Dispenser
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FR2778173B1 (en) * 1998-04-29 2000-06-30 Jean Charles Nickels HERMETIC FLUID DELIVERY DEVICE
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AU2003202768A1 (en) * 2003-02-07 2004-08-30 Hoffmann Neopac Ag Drop dispensing with insert for optimizing the dosing precision of liquids
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WO2011127610A1 (en) * 2010-04-12 2011-10-20 Hoffmann Neopac Ag One-way valve for discharge regulation in tubes, tube with such a one-way valve and method for manufacturing such a one-way valve
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Also Published As

Publication number Publication date
CH712432A1 (en) 2017-11-15
PL3241781T3 (en) 2019-07-31
ES2721772T3 (en) 2019-08-05
CA2965227C (en) 2023-03-21
EP3241781A1 (en) 2017-11-08
US10093461B2 (en) 2018-10-09
US20170320641A1 (en) 2017-11-09
CA2965227A1 (en) 2017-11-03

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