Closure having thread made of metal for closing a container, and method for producing same
Patent Information
- Application Number
- EP2023734208
- Authority / Receiving Office
- EP · EP
- Patent Type
- Applications
- Current Assignee / Owner
- Priority Date
- 2022-06-28
- Filing Date
- 2023-06-20
- Publication Date
- 2025-05-07
Smart Images
Figure 1.1
Abstract
Description
[0001] TITLE
[0002] METAL THREADED CLOSURE FOR CLOSING A CONTAINER AND METHOD FOR MANUFACTURING THE SAME
[0003] TECHNICAL FIELD
[0004] The present invention relates to closures made of metal, in particular made of aluminum, with an internal thread for closing a container and to methods for producing such closures, in particular for tubes, especially those made of aluminum, very particularly for tubes for the filling goods food, cosmetics, pharmaceuticals, toothpaste and industry.
[0005] STATE OF THE ART
[0006] Closures for containers with an external thread can be made from a variety of materials. Plastics, from which appropriate lids can be produced using injection molding, or metal are particularly suitable.
[0007] FR-A-3106340 describes a screw cap made of stamped metal for screwing onto a threaded neck of a tank, the cap comprising a generally cylindrical skirt defining an axis X and forming a stamped thread intended to threadably engage the thread on the neck of the tank, characterized in that the stamped thread comprises a plurality of stamped inclined segments projecting inwardly from the generally cylindrical skirt, two adjacent stamped inclined segments being separated by a smooth, non-stamped axial zone.
[0008] EP-A-0387544 describes a closure cap made of deep-drawable material, particularly aluminum, characterized by reinforcing ribs incorporated into the wall of the closure cap. These ribs are arranged at intervals along a spiral and form the thread of the closure cap. Due to the continuous strip-shaped areas between the reinforcing ribs, the closure cap has a very high degree of stability, which prevents blow-off, i.e., the closure cap does not pop off the container in the event of excess pressure.
[0009] GB 756,428 discloses screw closures for bottles, jars, canisters, and similar containers. The screw closures to which the document refers are of the type in which an outer metal embossment is provided within which an inner member is secured. The latter member is an embossment providing the screw thread. The outer metal embossment or outer member is intended to provide a smooth external appearance and conceal the screw thread of the inner member or embossment, with the lower edge of the outer embossment being rolled over the lower edge of the inner embossment.
[0010] DE 201 04 517 U1 discloses a screw closure system for containers, such as tubes or the like, with a first, conically shaped internal thread system arranged on a lid and a second, conically shaped external thread system arranged on a neck or in the region of a neck of a container, which can be screwed to the internal thread system, characterized in that at least one thread system of these thread systems is designed to have multiple threads.
[0011] FR-A-874380 relates to a particularly inexpensive device for cutting threads made from a tube, the edge of which is bent and shaped to form a neck or edge suitable for producing a turn for an internal or external thread.
[0012] US-B-7906056 discloses a cup-shaped closure material having a convex portion which is fitted onto a projection-like engaging portion of a distal end of a mandrel at a distance from the engaging portion of the mandrel, a molten resin is then placed in a cavity of a mold, and a punch pin having an outer peripheral portion of a distal end smaller than an outer peripheral portion of the distal end surface of the convex portion of the closure material is pressed against the distal end surface of the convex portion of the closure material, whereby the distal end surface of the convex portion of the closure material is folded to form an annular projection portion at the outer peripheral portion, and the molten resin is caused to envelop the annular projection portion while being pressed and filled into the cavity, thereby forming the head.A part is created with the closure material attached to it.
[0013] PRESENTATION OF THE INVENTION
[0014] It is an object of the present invention, among others, to provide a new closure, in particular for tubes, preferably made of aluminum, for filling goods from the areas of food, cosmetics, pharmaceuticals, toothpaste, industry (pastes, paints, sealants, filling materials, etc.).
[0015] The present invention accordingly relates, according to a first aspect, to a closure according to claim 1.
[0016] Specifically, the present invention relates to a threaded closure for closing a container, in particular a tube, e.g., a food tube. The closure is characterized in particular by comprising a one-piece or multi-piece metal closure element, produced from a flat sheet metal section in a stamping and forming process, with an internal thread.
[0017] The closure element has a circumferential, preferably substantially cylindrical (or also in the form of a straight, preferably regular, prism, with preferably 3-30 side surfaces, in particular 4 - 10 or 4 - 8 or 6 side surfaces, which can be the same or alternately different, for example) gripping area with a first diameter D, as well as a (preferably completely) arranged in the interior of this gripping area, coaxial to the gripping area, substantially cylindrical threaded area with a second diameter d, wherein the second diameter d is smaller than the first diameter D.
[0018] Furthermore, the proposed closure is characterized in that the grip region and the threaded region are circumferentially connected to one another at least on the side facing the container to be closed or merge into one another in this region.
[0019] A first preferred embodiment of such a closure is characterized in that the closure has a circumferential recess between the threaded area and the handle area on the side facing away from the container to be closed.
[0020] A particularly preferred embodiment is characterized in that the threaded area is closed on the side facing away from the container to be closed by a threaded area cover, and a piercing mandrel is formed in this threaded area cover, wherein preferably the edge of the handle area facing away from the container is designed as an inwardly directed rolled edge (particularly preferred when the threaded area and handle area are formed in one piece).
[0021] According to one variant, the handle portion can have a recess with a handle base on the side facing away from the container to be sealed, and a piercing spike can be formed in this handle base. Preferably, in this case, the handle portion and threaded portion are formed in two parts and are connected to each other circumferentially on the side facing the container to be sealed. In both cases, the piercing spike preferably does not protrude with its tip beyond the edge of the handle portion facing away from the container.
[0022] If such a piercing spike is made of a thin metal in order to keep material consumption as low as possible, it can be advantageous to provide a weakened portion in a corresponding sealing membrane of the container to be closed, so that the spike can effectively perform its function during the piercing process. According to a further aspect, the present invention also relates to such a closure with a piercing spike together with a container, e.g. a tube (e.g. a food container or also a tube in the cosmetics, pharmaceutical, toothpaste, industrial sectors, in each case preferably made of aluminum) with a sealing membrane, wherein this sealing membrane has a suitable weakening, e.g. through one or more predetermined breaking points.
[0023] The handle area and the threaded area can be formed by two parts which are connected to one another circumferentially on the side facing the container to be closed, this connection preferably being formed by a common roller.
[0024] The grip area and the threaded area can also be formed by one part, and these two parts can merge into one another on the side facing the container to be closed, wherein preferably in the transition area the side facing the container has a circular cone-shaped section which is adapted to a corresponding concave circumferential formation of a tube.
[0025] The threaded area may be closed on the side facing away from the container to be closed by a threaded area cover, and this threaded area cover may have a bevelled area and a radial area.
[0026] A further preferred embodiment of the proposed closure is characterized in that the handle area has a separate insert which is connected to the handle area on the side facing away from the container, preferably via a common roller.
[0027] This separate insert preferably has a recess facing the container with a lower region and preferably a piercing mandrel in this lower region.
[0028] This separate insert can also be designed as a ring-shaped centering opening. Alternatively, the separate insert can be designed as a continuous cover.
[0029] The threaded area is preferably closed by a threaded area cover on the side facing away from the container to be closed, and preferably also has a seal on the side facing the container.
[0030] The threaded area cover can also have a recess that engages at least partially into the through opening of a closure area of the container.
[0031] Typically, the handle area and threaded area as well as any additional inserts present are made of aluminum or steel, preferably of an aluminum foil, particularly preferably painted on at least one side (ideally a food-grade paint), preferably with a thickness in the range of 80-400 pm, in particular in the range of 150-250 pm, punched and formed and optionally connected to one another in a form-fitting and / or force-fitting manner.
[0032] Preferably, the closure consists only of metal, preferably of aluminum, and is further preferably combined with a tube also consisting of the same metal, preferably of aluminum, in order to be optimally equipped and intended for recycling.
[0033] Particularly for use as a closure for a tube, the grip region preferably has a first diameter (D, outside) in the range of 5-50 mm or 5-35 mm or 9-30 mm, preferably in the range of 10-25 mm, particularly preferably in the range of 15-25 mm or 22-25 mm. Diameters (D) of the grip region of approximately 16 mm, approximately 25 mm, or approximately 35 mm are preferred.
[0034] For the same application, the second diameter (D, outside) of the threaded portion is in the range of 3-20 mm, preferably in the range of 5-18 mm, particularly preferably in the range of 8-15 mm. Diameters (d) of the threaded portion of approximately 9 mm, approximately 11 mm, or approximately 15 mm are preferred.
[0035] As stated, the handle area and the threaded area can be formed in one piece, wherein the threaded area is closed on the side facing away from the container to be closed by a threaded area cover, and wherein the plane of this threaded cover is arranged substantially at the height of the edge of the handle area facing away from the container or offset by a maximum of less than 3 mm towards the container, wherein preferably the side of the handle area facing away from the container has an inwardly directed rolled edge.
[0036] In the threaded area, typically at least one thread turn, preferably only one thread turn, is provided, which particularly preferably rotates less than 360° and was formed in a forming process.
[0037] As mentioned, the threaded area and the handle area can be formed in two parts, and these then preferably enclose a hollow space.
[0038] The threaded area and the handle area can also be formed as one piece, and in addition, a separate insert can be attached to the handle area, and these, the threaded area and the handle area with the separate insert, then enclose a cavity.
[0039] According to a further aspect of the present invention, it relates to the use of a closure as described above as a closure of a container, in particular a tube, particularly preferably a food tube.
[0040] The present invention further relates to a container, in particular a tube, e.g., a food tube, with a closure as described above. Finally, the present invention relates to a method for producing a closure as described above using a stamping and forming process.
[0041] Such a method is preferably characterized in that, if the handle area and threaded area are formed in one piece, a plate, e.g. from a sheet metal strip, is punched out, from this plate in a first sequence of steps a recess is formed to form the threaded area and any piercing mandrel present and the thread is formed, and in a further sequence of steps the handle area is formed, if necessary with a rolled edge, or that, if the handle area and threaded area are formed in two parts, these are each formed individually from a plate and then connected to one another in the transition area in a final step.
[0042] Preferably, the internal thread is formed by inserting a thread core into a substantially cylindrical portion of a blank and by stamping the internal thread from the outside, preferably as a single thread, by a rotating collet with thread segments in at least one step.
[0043] The collet preferably has at least 20 thread segments, particularly preferably at least 30 thread segments, or in the range of 40-70, preferably in the range of 40-60 thread segments. The thread segments are preferably each separated from one another by a radial slot, but are connected to one another via an annular element or are formed integrally therewith. The collet is therefore designed as an annular unit with the thread segments, wherein the thread segments can be offset in the axial direction for stamping. The radial movement of the thread segments of the collet is preferably caused by a circumferential collet cone which, with a conical link, moves in an axial movement onto a corresponding conical link of the collet, thus offsetting the individual thread segments inwards in the axial direction in a controlled and synchronous manner and forming the thread pitch.
[0044] Particularly preferably, the substantially cylindrical portion is compressed in the axial direction at least during the action of the collet to ensure that sufficient material is available for the deformation of the thread and that the material retains substantially the same thickness.
[0045] Further embodiments are specified in the dependent claims. or
[0046] BRIEF DESCRIPTION OF THE DRAWINGS
[0047] Preferred embodiments of the invention are described below with reference to the drawings, which are for illustrative purposes only and are not to be construed as limiting. In the drawings:
[0048] Fig. 1 shows various representations of a first embodiment of a closure, wherein in a) a side view, in b) a view from below (container side), in c) a sectional view along the line AA in figure a), in d) a sectional view along the line BB in figure b), in e) a perspective sectional view in a half section with container and in f) a perspective sectional view in a quarter section with container are shown;
[0049] Fig. 2 shows a second embodiment of a closure, in a perspective sectional view in a half section with container;
[0050] Fig. 3 various representations of a third, two-part embodiment of a closure, wherein in a) a side view, in b) a view from above (side facing away from the container), in c) a sectional view along the line BB in Figure a), in d) a sectional view along the line A-A in Figure b), in e) a perspective sectional view in a half section with container, a variant with a recess in the threaded area cover and in f) a perspective sectional view in a quarter section with container are shown;
[0051] Fig. 4 shows a further embodiment with a separate insert for the piercing mandrel;
[0052] Fig. 5 shows a further embodiment with a separate insert as a centering cover;
[0053] Fig. 6 shows a further embodiment with a separate insert as a cover for the handle area;
[0054] Fig. 7 is an axial section through the elements of a tool for forming the thread in one embodiment, wherein the opened tool is shown after the thread has been formed and the machining tool parts have already been removed from the machined part;
[0055] Fig. 8 an opened tool in an axial section before machining the blank in a) and in a top view in b);
[0056] Fig. 9 the closed tool analogous to Fig. 8 in an axial section in the closed state during machining in a) and in a top view in b).
[0057] DESCRIPTION OF PREFERRED EMBODIMENTS
[0058] Fig. 1 shows various representations of a first embodiment of a closure 1. It should be noted right at the outset that the same reference numerals in the various figures designate the same or analogous elements.
[0059] The first embodiment according to Fig. 1 has a gripping area 2 and a threaded area 3 with an internal thread 8, which together form the closure element 7. The threaded area 3 is located, so to speak, within the gripping area. The gripping area 2 is cylindrical, and axial recesses 11 are distributed around the circumference in the cylindrical outer surface, although a region 12 remains without recesses. However, a completely smooth or polygonal design is also possible.
[0060] On the upper edge facing away from the container 15, an inwardly directed rolled edge 10 is formed, which has a diameter such that the interior and the piercing mandrel 6 arranged therein are optimally accessible for its use but are nevertheless hidden, in that the upper edge of this inwardly directed rolled edge 10 is higher than the tip of the piercing mandrel 6, so that the piercing mandrel does not protrude beyond this upper edge.
[0061] On the side facing the container 15, the grip region 2, which is formed integrally with the threaded region 3 here, merges into the threaded region 3 in the transition region 9. In this transition region 9, there is a circular cone-shaped section 46, which is essentially adapted to the contour of the container 15, as can be seen from Figures 1 e), f). This circular cone-shaped section 46 is followed by a substantially cylindrical region of the threaded region 3, and a thread 13 is formed in this cylindrical region.
[0062] The thread 13 does not rotate a full 360°, as can be seen from the comparison of the sections in Figures c) and d). However, it is also possible that the thread 13 rotates more than 360°.
[0063] Above the threaded area 3 with the thread 13 there follows a threaded area cover 4 which closes off the threaded area 3 at the top. In this threaded area cover there is initially a chamfered area 21, seen from the radial outside, which, as can be seen from Fig. 1 f), serves to lie optimally on the external thread 17 of the closure area 16 of the container, and this is followed by the radial area 47 of the threaded area cover 4. This radial area 47 comes into optimal contact with the upper circumferential edge 19 of the closure area 16 of the container 15 when the lid is in place. An additional seal can therefore be dispensed with, but it is also possible to provide a sealing ring in this area or to extrude a corresponding ring. A circumferential sealing rib can also be stamped in the radial area 47.
[0064] Radially inward follows the piercing mandrel 6, which has a cylindrical portion 14, which transitions upwards into the actual circular cone-shaped mandrel portion (in f) is a variant with a pyramidal mandrel with surfaces 27, as shown in Fig. 3). This creates a circumferential recess 32 between the threaded portion 3 and the grip portion 2.
[0065] Such a closure can be manufactured in one piece from a blank using a stamping and forming process.
[0066] The typical procedure is that after punching the blank, a cup-shaped recess is formed in one or more passes, which is then further formed in subsequent passes into a stepped cup-shaped recess to form the piercing mandrel 6. Typically, at the end of this process, the thread is subsequently formed in the axial circumferential wall of the threaded area 3.
[0067] In a further phase, the radially outwardly directed outer edge of the plate is then folded upwards and, in one or more passes, the grip area 2 is formed, if necessary, axial ribs or depressions 11 are embossed and then the edge 10 is rolled.
[0068] By means of such a closure, as can be seen in particular from Fig. 1 e) and f), the interior 28 of a container 15, here a tube, can be optimally closed with a closure area 16 with an external thread 17.
[0069] This is achieved with as little material as possible, and with the advantage that recycling is particularly easy with a metal tube made of aluminum, even if the lid is also made of aluminum, since everything is made of the same material. In other words, plastic can be omitted without sacrificing a good lid design and with the same positive properties, particularly with regard to stability and the possibility of tamper-evident protection with a piercing spike and a membrane that initially seals the container (not shown in the figures).
[0070] Since, if the starting material of such a piercing mandrel is particularly thin, it may not be particularly strong and could fail due to a strong sealing membrane of such a tube-shaped container, it may be advantageous in such a situation to provide the membrane of such a tube with predetermined breaking points, for example scratches or similar.
[0071] Fig. 2 shows another embodiment of such a closure. The closure is also a single piece, but in this case, it does not have a piercing spike, and the threaded area cover 4 is located approximately at the level of the upper edge, or rather, the inwardly directed rolled edge 10, on the handle area 2.
[0072] In order to ensure an optimal seal, a seal 22 can also be provided on the underside of the radial area 47 of the threaded area cover 4, either as an insert or cast or extruded.
[0073] A third embodiment, now in a two-part design, is shown in Fig. 3. Here, the handle area 2 and the threaded area 3 are punched and formed from two separate, different parts, and they enclose a closed cavity 31. The threaded area 3 has a purely radially extending threaded area cover 4, i.e., it is closed at the top. At the bottom, the threaded area 3 is connected to the handle area 2 via a common roller 23, with the inner roller 34 being formed by the threaded area and the outer roller 33 by the corresponding lowest area of the handle area. This rolling connection is positive and / or non-positive and can be easily formed in a further station or as part of a station during the punching and forming processes without the use of adhesion promoters.
[0074] The handle area 2, in turn, is in this case also not formed with a through-opening, but is closed at the top, namely in that in this area first an upper area 24, which runs radially, is formed from this handle area, then an axial area 26 follows in the axial direction, followed again in the radial direction inwards by a lower area 25. In this lower area 25, in turn, a piercing mandrel 6 is formed.
[0075] Here, too, there is an area in the form of a circumferential recess 32, this time formed by the handle area 2, and in this circumferential recess the piercing mandrel 6 forms the center.
[0076] In this case, the piercing mandrel 6 is not circular conical in shape, but has flat areas 27, which for certain applications can provide increased stability, increased piercing force and a more stable fracture pattern of the first-opening membrane on the opened container.
[0077] Such a closure can also be manufactured using a pure stamping and forming process. For example, in two separate processes, the handle area 2 and the threaded area 3 are first formed from a blank, possibly parallel to each other, and these are then connected to each other via the common roller 23.
[0078] For example, the handle area can be formed by first forming the circumferential recess 32 in several stages, and then the actual cylindrical circumferential handle area with the recesses 11, whereby a purely axially extending edge remains at the lower edge.
[0079] The threaded area is formed by creating the cup-shaped recess for the actual thread, stamping the thread and, if necessary, reshaping it, and preparing the rolling zone in an axial direction. The edge can then be rolled at the threaded area. Subsequently, the parts are brought together, and the axially free circumferential edge of the grip area is rolled around the roller 34 in the shape of the roller 33, thus connecting the two parts.
[0080] In connection with Fig. 3, particular attention should be drawn to Fig. 3 e). In the variant shown there, to increase the sealing effect, the threaded area cover 4 has a recess 30 engaging in the through-opening 18 in the closure area 16 of the food container (here a tube). The outer diameter of this recess 30 essentially corresponds to the inner diameter of the through-opening. Here, too, a sealing ring or similar seal can additionally be applied or inserted. Further exemplary embodiments are shown in Figs. 4 - 6, wherein in each case the threaded area 3 and the handle area 2 are formed as a single piece, and a separate insert 35 is additionally provided in the handle area.
[0081] In Fig. 4, this additional insert 35 is formed with a recess, which in turn is a circumferential recess 32, since a piercing mandrel 40 is provided in the center. In other words, this separate insert 35 has an upper radially extending region 37, an axial region 39, and a subsequent lower, again radially extending region 38, and in the center of which the piercing mandrel 40 is formed, here as a circular cone. If the membrane in the container 15 has predetermined breaking points, a circular cone can be used instead of a pyramid-shaped piercing mandrel. This circular cone has the advantage of being easier to form.
[0082] The separate insert 35 is also connected to the handle area via a common roller 36, whereby the rolling area 42 is provided by the handle area and the rolling area 43 by the separate insert 35.
[0083] In Fig. 5, the separate insert 35 is designed only in the form of a centering ring, the inner edges of which have a folded area 41, so that a defined centering opening 45 can be created for the piercing process with the piercing mandrel 6, which in this case is formed in the bottom of the threaded area cover 4.
[0084] In Fig. 6, the separate insert 35 is designed as a closed, continuous cover 44, which in turn is connected to the handle area 2 via a roller 36. Thus, as in the embodiment according to Fig. 4, a cavity 31 is formed between the component formed by the handle area and threaded area and the separate insert 35.
[0085] Figs. 7-9 illustrate a possible and preferred method for producing a thread, particularly in connection with an embodiment as shown in Fig. 2. The same method can also be used in connection with the embodiment as shown in Fig. 1.
[0086] In Fig. 7, the opened tool is shown immediately after the internal thread 8 has been formed in the threaded area 3 of a blank. A thread core 48 is already drawn out of the interior of the blank, preferably by a rotary movement, and shown below. The core 48 has at least one circumferential recess 49 on the cylindrical outer surface with a pitch corresponding to the thread 8. This recess 49 serves as the counter surface in the stamping process.
[0087] On the outside right, the collet 50 is shown, which has individual thread segments 58, each with a radially inwardly directed ridge 52 that is used for stamping the thread 8. On the outside, the collet 50 has a cone 53. During the forming process to form the thread 8, a counter cone 54 of the annular collet cone 51 runs onto this cone 53 by moving downward in the axial direction.
[0088] In this way, it is ensured that the individual crests 52 of the plurality of thread segments 58 are synchronized and simultaneously displaced radially inwards and the thread 8 is formed by driving a previously cylindrical section 55 through the individual crests 52 into the corresponding recess 49.
[0089] This process is illustrated in detail in Figures 8 and 9, where (a) shows an axial view of the tool shortly before the thread is formed, and (b) a top view. Figure 8 shows the open tool before the thread is formed, while Figure 9 shows the closed position at the end of the thread formation.
[0090] In a first step, the thread core 48 is inserted into the interior of the cylindrical section 55 of the blank by an axial movement. Parallel to this or after this, the collet 50 and collet cone 51 move from the outside into the corresponding axial position. In this open position, there are radial gaps 59 between the individual segments 58, which are sufficiently narrow to allow a smooth thread surface to be produced during the forming process. Typically, 50-70 individual thread segments 58 are used for this purpose, which are connected to one another as a collet.
[0091] Subsequently, the pliers cone 51 moves axially downward in the illustration according to Figure 8a), so that the cone 54 slides on the cone 53 and the individual thread segments 58 are displaced radially inward in a coordinated and synchronized manner. In this case, the ridge 52 meets the cylindrical section 52 and, with the corresponding recess 49 as the counter surface, forms the thread pitch 13, as shown in Fig. 9.
[0092] Ideally, the collet 50 is designed so that in the closed position shown in Fig. 9b), the previously open gaps 59 then come into contact as closed gaps 60, so that a smooth surface of the thread can be produced.
[0093] As shown by the arrows 61 in Fig. 8a), an axial force is advantageously applied to the component during the penetration of the combs 52 into the recesses 49, so that the component is compressed in the axial direction and material for the formation of the circumferential groove of the thread 13 is pushed into the required region and no tapering of the material occurs due to the forming process.
[0094] The thread core 48 is then removed from the component and the component is thus released.
[0095] LIST OF REFERENCE SYMBOLS
[0096] 1 closure 16
[0097] 2 Grip area 20 Cavity within 2
[0098] 3 threaded area 21 chamfered area of 4
[0099] 4 Threaded area cover 22 Seal
[0100] 5 Grip area floor 23 common role
[0101] 6 piercing mandrel 24 upper area of 5
[0102] 7 Closure element 25 lower area of 5
[0103] 8 internal threads 26 axial range of 5
[0104] 9 transition area 27 flat area of 6
[0105] 10 inward-facing 28 interior of 15 rolled edge of 2 29 container wall
[0106] 11 axial recess in the 30 recess in 4 grip area 31 cavity between 2 and 3
[0107] 12 Area without recesses 32 Circumferential recess
[0108] 13 thread pull 33 rolling range at 23 of 2
[0109] 14 cylindrical area of 6 34 rolling area at 23 of 3
[0110] 15 containers 35 separate insert in 2
[0111] 16 closure range of 15 36 common role of 2 and
[0112] 17 external threads of 16 35
[0113] 18 passage opening in 16 37 upper area of 35
[0114] 19 upper peripheral edge of 38 lower area of 35 axial area of 35 57 50 closed
[0115] Piercing mandrel in 35 58 single segment of 50 folded area of 35 59 radial columns between 58
[0116] Roll area at 36 of 2 60 closed columns
[0117] Rolling area at 36 of 35 61 axial force continuous cover of 35 centering opening circular conical section D first diameter of 9 d second diameter radial area of 4 d1 diameter of the flat
[0118] Thread core area without 21 of 4
[0119] Recesses in 48 d2 diameter of 14
[0120] Thread segment / clamping d3 inner diameter of 13 pliers d4 inner diameter at
[0121] Pliers cone bottom of 11 comb on 50 d5 inner diameter of 32
[0122] Cone at 50 H height of 2
[0123] Cone at 51 h height of 3 cylindrical section of h1 height of the bevel at 9
[0124] Blank h2 height of 26
[0125] 50 open h3 height of 23
Claims
PATENT CLAIMS 1. A closure (1) with a thread for closing a container, in particular a tube, in particular a tube for food, cosmetics, pharmaceuticals, toothpaste, and / or industrial filling goods, characterized in that the closure (1) has a one-piece or multi-piece closure element (7) made of metal and produced from a flat sheet metal section in a stamping and forming process, with an internal thread (8), wherein the closure element (7) has a circumferential, preferably substantially cylindrical, gripping area (2) with a first diameter (D), and a substantially cylindrical threaded area (3) arranged in the interior of this gripping area (2) and coaxial with the gripping area, with a second diameter (d), wherein the second diameter (d) is smaller than the first diameter (D),and wherein the grip region (2) and the threaded region (3) are connected to one another circumferentially at least on the side facing the container (15) to be closed or merge into one another in this region (9).
2. Closure (1) according to claim 1, characterized in that the closure (1) has, on the side facing away from the container (15) to be closed, a circumferential recess (32) between the threaded area (3) and the handle area (2).
3. Closure (1) according to one of the preceding claims, characterized in that the threaded region (3) is closed on the side facing away from the container to be closed by a threaded region cover (4), and a piercing spike (6) is formed in this threaded region cover (4), wherein preferably the edge of the handle region (2) facing away from the container (15) is designed as an inwardly directed rolled edge (10), and / or that the handle region (2) has a recess with a handle region base (5) on the side facing away from the container to be closed, and a piercing spike (6) is formed in this handle region base (5), wherein preferably in this case the handle region (2) and threaded region (3) are formed in two parts and are connected to one another in a circumferential manner on the side facing the container (15) to be closed, wherein the piercing spike (6) preferably does not protrude with its tip beyond the edge of the handle area (2) facing away from the container (15).
4. Closure (1) according to one of the preceding claims, characterized in that the grip region (2) and threaded region (3) are formed by two parts which are connected to one another circumferentially on the side facing the container (15) to be closed, this connection preferably being formed by a common roller (23).
5. Closure (1) according to one of the preceding claims, characterized in that the grip region (2) and threaded region (3) are formed by one part, and these two parts merge into one another on the side facing the container to be closed, wherein preferably in the transition region (9) the side facing the container has a circular cone-shaped section (46).
6. Closure (1) according to one of the preceding claims, characterized in that the threaded region (3) is closed on the side facing away from the container to be closed by a threaded region cover (4), and that this threaded region cover (4) has a beveled region (21) and a radial region (47).
7. Closure (1) according to one of the preceding claims, characterized in that the handle area (2) has a separate insert (35) which is connected to the handle area (2) on the side facing away from the container (15), preferably via a common roller (36), wherein preferably this separate insert (35) has a recess facing the container (15) with a lower region (38) and preferably in this lower region a piercing mandrel (40), and / or wherein preferably this separate insert (35) is designed as a centering opening (45) in the shape of a ring, and / or wherein preferably this separate insert (35) is designed as a continuous lid (44).
8. Closure (1) according to one of the preceding claims, characterized in that the threaded area (3) is closed on the side facing away from the container to be closed by a threaded area cover (4), and that on the side facing the container, this threaded area has a seal (22), and / or that the threaded area cover (4) has a recess (30) which engages at least partially into the through-opening (18) of a closure area (16) of the container (15).
9. Closure (1) according to one of the preceding claims, characterized in that the handle area (2) and threaded area (3) and any further inserts (35) present are made of aluminum or steel, preferably from an aluminum foil, particularly preferably painted on at least one side, preferably with a thickness in the range of 80-400 pm, in particular in the range of 150-250 pm, punched and formed and optionally connected to one another in a form-fitting and / or force-fitting manner, and / or closure (1) according to one of the preceding claims with a handle area (2) and threaded area (3) and any further inserts (35) present made of aluminum combined with a tube made of aluminum.
10. Closure (1) according to one of the preceding claims, characterized in that the grip region (2) has a first diameter (D) in the range of 5-50 mm, preferably in the range of 9-35 mm, particularly preferably in the range of 15-25 mm, and / or that the second diameter (d) of the threaded region is in the range of 3-20 mm, preferably in the range of 5-18 mm, particularly preferably in the range of 8-15 mm.
11. Closure (1) according to one of the preceding claims, characterized in that the grip region (2) and threaded region (3) are formed in one piece, that the threaded region (3) is closed on the side facing away from the container to be closed by a threaded region cover (4), and that the plane of this threaded cover (4) is arranged substantially at the height of the edge of the grip region (2) facing away from the container (15) or offset by a maximum of less than 3 mm towards the container (15), wherein preferably the side of the grip region (2) facing away from the container has an inwardly directed rolled edge (10).
12. Closure (1) according to one of the preceding claims, characterized characterized in that in the thread region (3) at least one thread turn (13), preferably only one thread turn (13), which particularly preferably rotates less than 360°, is formed in a forming process.
13. Closure (1) according to one of the preceding claims, characterized in that the threaded region (3) and the handle region (2) are formed in two parts and enclose a cavity (31), or that the threaded region (3) and the handle region (2) are formed in one part and, in addition, a separate insert (35) is fastened to the handle region (2) and these enclose a cavity (31).
14. Use of a closure (1) according to one of the preceding claims as a closure of a container, in particular a tube, preferably made of the same material as the closure, in particular preferably a tube for food, cosmetics, pharmaceuticals, toothpaste, and / or industrial filling goods, or container, in particular a tube, preferably made of the same material as the closure, in particular preferably a tube for food, cosmetics, pharmaceuticals, toothpaste, and / or industrial filling goods with a closure according to one of the preceding claims.
15. A method for producing a closure (1) according to one of the preceding claims in a punching and forming process, characterized in that, if the handle region (2) and threaded region (3) are formed in one piece, a blank is punched free, from this blank in a first step sequence a recess is formed for forming the threaded region, as well as any piercing mandrel present, and the internal thread (8) is formed, and in a next step sequence the handle region (2) is formed, if necessary with a rolled edge (10), or that, if the handle region (2) and threaded region (3) are formed in two parts, these are each individually formed from a blank, preferably the internal thread (8) is formed, and then are connected to one another in the transition region (9), preferably in a last step, wherein the internal thread (8) is preferably formed,by inserting a thread core (48) into a substantially cylindrical section (55) of a blank and from the outside the internal thread (8), preferably as a thread pull (13), through, a rotating collet (50) with thread segments (58) is embossed in at least one step, wherein the radial movement of the thread segments (58) of the collet (50) is preferably caused by a rotating collet cone (51) which, with a conical link (54), moves in an axial movement onto a corresponding conical link (53) of the collet (50), and / or wherein particularly preferably the substantially cylindrical section (55) is compressed in the axial direction (61) at least during the action of the collet (50).