Device for coupling at least one set of molded elements and associated mold and method

Abstract

The invention relates to a device for coupling at least one set of elements (2) molded in an injection mold, the or each of the sets of elements comprising a first element (21) and a second element (22), the coupling device comprising an actuating member (15) cooperating with a first cam (13) and with a second cam (14), the actuating member being configured to cause at least one movement of the first cam relative to a frame (11) and / or cause at least one movement of the second cam relative to the frame so as to cause at least one movement of an engagement member (12) which makes it possible, for the or each of the plurality of sets of elements, via cooperation with the first element, to move the first element relative to the second element from an uncoupled position to a coupled position.

Description

[0001] Coupling device for at least one set of molded elements, mold and associated process

[0002] Technical field of the invention

[0003] The present invention relates to the technical field of coupling devices for molded elements, and more particularly, to coupling devices intended to equip an injection mold so as to perform the coupling of the elements, directly after molding, so as to benefit from the elasticity of the molded elements before the end of cooling, which is greater than that of the molded elements after the end of cooling.

[0004] State of the art

[0005] In the context of production processes, certain molded components must be joined. This is the case, for example, with a cap, which typically consists of a body and a lid. These parts must be joined during production to facilitate further processing of the cap along the production line. The cap body is generally intended to be attached to a container. The lid is generally intended to be moved from a position joined to the body to a position unjoined, and vice versa. The position of the lid joined to the body, generally called the "closed position," allows the contents of the container to be retained when the cap is attached.The position of the lid decoupled from the body, generally called the "opening position", allows the contents arranged inside the container to be emptied out of the container when the cap is attached to the container.

[0006] The production process typically includes a molding step for the components, followed by a joining step. The molding step is usually performed using an injection mold. In one embodiment, the joining step is carried out directly after the molding step to take advantage of the components' superior elasticity before cooling compared to their elasticity after cooling. To this end, the joining devices for the joining step are generally mounted directly on the mold to allow for the rapid combination of the two steps. Furthermore, performing the joining step before cooling minimizes investment, as specialized machines for post-cooling joining are generally more complex and expensive.

[0007] Such coupling devices are described in documents no. EP 2 457 713 (Moulindustrie), no. EP 1 386 712 (BVA), and no. WO 2018 / 191813 A1 (Husky Injection Molding Systems). These coupling devices comprise an engagement member designed to cooperate with a first molded element and a cam cooperating with said engagement member so as to guide said engagement member along a predetermined profile so that the engagement member, by cooperating with said first element, moves said first element relative to a second element from a decoupled position to a position coupled with said second element. For stability reasons, when the engagement member has a significant lever arm, these coupling devices may include a parallel cam also cooperating with said engagement member so as to guide the engagement member along the same predetermined profile.

[0008] These coupling devices are, however, only suitable for a specific type of molded part and a specific range of dimensions. Therefore, it is not possible to use these coupling devices for molded parts with shapes and dimensions that are significantly different from those for which they were designed.

[0009] Other coupling devices are described in documents EP 3 581 358 (NYPROMOLD) and WO 2019 / 053292 A1 (ERMO). These coupling devices comprise an engagement member for cooperating with a first molded element, a first mechanical linkage for guiding said engagement member through a translational movement, and a second mechanical linkage for guiding said engagement member through a rotational movement. By combining the translational and rotational movements, the engagement member is moved to displace said first element relative to a second element from a decoupled position to a position coupled with said second element.

[0010] Like cam-operated couplings, these coupling devices are only suitable for a specific type of molded part and a specific range of dimensions. Therefore, it is not possible to use these coupling devices for molded parts with shapes and dimensions that are significantly different from those for which they were designed. Faced with this limitation, the invention aims to provide a coupling device versatile enough to equip a large number of molds, enabling the production of a wide variety of molded parts with very different dimensions and shapes.

[0011] Disclosure of the invention

[0012] The solution proposed by the invention is a coupling device for at least one set of elements molded in an injection mold, said coupling device being intended to equip said injection mold, said set or each of said sets of elements comprising a first element capable of being coupled with a second element, said coupling device comprising:

[0013] — a building,

[0014] — an engagement mechanism intended to cooperate with the said first element of one or more of the said sets of elements,

[0015] — a first cam mounted movable relative to said frame, said first cam cooperating with said engagement member so as to guide said engagement member according to a first profile,

[0016] The coupling device is remarkable in that it also includes:

[0017] — a second cam mounted movable relative to the frame, said second cam cooperating with the engagement member so as to guide said engagement member according to a second profile, said second profile being different from said first profile,

[0018] — an executing element to generate at least one displacement of said first cam relative to said frame, and / or at least one displacement of said second cam relative to said frame, so as to generate at least one displacement of said engagement element allowing, for said or each of said several sets of elements, by cooperation with said first element, to move said first element relative to said second element from a decoupled position to a coupled position.

[0019] Thus, the coupling device according to the invention comprises two cams that guide the engagement member along two different profiles. Different combinations of cam displacements then allow for different movements of the engagement member. It is therefore possible to adapt the movement of the engagement member to the shape and dimensions of the set of molded components. Furthermore, the use of cams makes it possible to obtain a relatively compact device. Indeed, the cams can be arranged in parallel and, in particular, eliminate the need for mounting one mechanical linkage for translation at the end of another.

[0020] According to one embodiment:

[0021] — the first cam is movable in translation relative to the frame along a first direction of translation

[0022] — the second cam is movable in translation relative to said frame along a second direction of translation parallel to said first direction of translation.

[0023] Moving the cams in the same direction allows the cams to be arranged in parallel, next to each other, and thus optimizes the compactness of the coupling device.

[0024] In one embodiment, the implementing body comprises:

[0025] — a first electric motor connected to at least one first pinion so as to drive said at least one first pinion, said at least one first pinion cooperating with a first rack so as to generate at least one translational displacement of the first cam,

[0026] — a second electric motor connected to at least one second pinion so as to drive said at least one second pinion, said at least one second pinion cooperating with a second rack so as to generate at least one translational displacement of the second cam.

[0027] The drive by a "rack and pinion" assembly allows the drive motor to be arranged perpendicular to the direction of translation of the cams, in one embodiment, in the width of the injection mold so as to further optimize the footprint of the coupling device.

[0028] According to one embodiment:

[0029] — the first profile is flat,

[0030] — the second profile is flat,

[0031] — said first profile and said second profile are intersecting and form between them an inter-profile angle between 15° and 165°.

[0032] The use of flat profiles oriented in two distinct directions of space allows for great versatility in generating a multitude of movements of the engagement element, while ensuring that the cams are of simple design, and therefore very easy to obtain by basic machining.

[0033] In one embodiment, the inter-profile angle is 90°. This 90° positioning simplifies the control of the engagement member's movement by allowing it to evolve around an orthonormal coordinate system. In one embodiment:

[0034] — the first cam comprises a first plate in which a first slot is provided, said first slot having at least one first edge extending along the first profile,

[0035] — the engagement mechanism includes a first cam follower cooperating with said first edge,

[0036] — the second cam comprises a second plate in which a second light is provided, said second light having at least one second edge extending along the second profile,

[0037] — the engagement mechanism includes a second cam follower cooperating with said second edge.

[0038] The arrangement of openings in the cams allows the engagement mechanism to be positioned through the openings of the parallel cams, thus optimizing the compactness of the coupling device. Assembly and maintenance operations are also simplified.

[0039] According to one embodiment, the engagement member comprises a bar capable of exerting contact pressure on the first element of at least one set of elements, said bar being mounted freely in rotation on the first cam follower and being mounted freely in rotation on the second cam follower.

[0040] The free mounting of the engagement member relative to the cam followers allows for a free-rolling engagement member which can freely roll on the first molded element with which it cooperates and thus avoid the risk of scratching the surface of said first molded element in contact with said engagement member.

[0041] According to one embodiment, the coupling device comprises several coupling assemblies, each associated with a set of element sets, each of said coupling assemblies comprising an engagement member, a first cam and a second cam, the executing member cooperating with said first cam and said second cam of each of said coupling assemblies, said executing member being configured to jointly generate at least one displacement of all the first cams relative to said frame, and to jointly generate at least one displacement of all the second cams relative to said frame.

[0042] The arrangement of several coupling assemblies allows for the coupling of multiple rows of molded element sets using a single implementing device, thus further optimizing the compactness of the coupling apparatus. Another aspect of the invention, providing the same advantages as the coupling apparatus of the invention, relates to an injection mold for molding at least one element set, said or each of said element sets comprising a first element and a second element, said injection mold comprising:

[0043] — a first part of the mold configured to define a first part of said or each of said sets of elements;

[0044] — a second mold part configured to define a second part of said or each of said sets of elements;

[0045] This injection mold is remarkable in that it also includes a coupling device according to the invention.

[0046] Yet another aspect of the invention relates to a method for coupling at least one set of elements molded in an injection mold, said or each of said sets of elements comprising a first element and a second element, said coupling method comprising the following steps:

[0047] — a) provide an engagement mechanism designed to cooperate with said first element of one or more sets of elements,

[0048] — b) provide a first cam mounted movable relative to a frame, said first cam cooperating with said engagement member so as to guide said engagement member along a first profile,

[0049] — c) provide a second cam mounted movable relative to said frame, said second cam cooperating with said engagement member so as to guide said engagement member according to a second profile, said second profile being different from said first profile,

[0050] — d) generate at least one displacement of said first cam and / or at least one displacement of said second cam so as to generate at least one displacement of said engagement member enabling, for said or each of said several sets of elements, by cooperation with said first element, to move said first element relative to said second element from a decoupled position to a coupled position.

[0051] This process allows for the coupling of molded components by moving two cams that guide the engagement member along two different profiles. This makes the process highly versatile, as different cam movement combinations allow for various movements of the engagement member. It is thus possible to adapt the movement of the engagement member to the shape and dimensions of a wide variety of molded component sets. Furthermore, the implementation of this process requires minimal space, thanks in particular to the use of cams that are more compact than series-connected mechanical linkages. Indeed, the cams can operate in parallel, thus requiring a smaller footprint than series-connected mechanical linkages.

[0052] Description of the figures

[0053] Other features and advantages of the invention will become apparent from the detailed description below of particular embodiments of the invention, given by way of example, but not limitation, with reference to the attached drawings which illustrate:

[0054] — [Fig.1] is a schematic view of an example embodiment of the coupling device according to the invention in which the engagement member is in a first position;

[0055] — [Fig.2] is a schematic view of an example of mounting a coupling device according to the invention positioned relative to an injection mold;

[0056] — [Fig.3] is a schematic view of the example embodiment of the coupling device of figure [Fig.1] for which the engagement member is in a second position;

[0057] — [Fig.4] is a schematic view, from another direction of observation, of the example embodiment of the coupling device of figure [Fig.1] for which the engagement member is in the same position as in figure [Fig.3];

[0058] — [Fig.5] is a schematic view of the example embodiment of the coupling device of figure [Fig.1] for which the engagement member is in a third position;

[0059] — [Fig.6] is a schematic view of the example embodiment of the coupling device of figure [Fig.1] for which the engagement member is in a fourth position;

[0060] — [Fig.7] is a schematic view of an example of the operation of the assembly "engagement member, first cam and second cam" of a coupling device according to the invention.

[0061] Detailed description

[0062] A first aspect of the invention relates to a coupling device 1 of at least one set of elements 2.

[0063] As shown in Figures [Fig 1] to [Fig. 6], the set of elements 2, or each of the sets of elements 2, comprises a first element 21 suitable for coupling with a second element 22. Coupling the first element 21 and the second element 22 during the production process can, in particular, facilitate the subsequent processing of the set of elements 2 by the production line. This coupling also helps to limit the risk of loss of one of the elements and to reduce the risk of degradation of the elements, for example, of the hinge when the two elements are connected by a hinge.

[0064] In a first embodiment of the element set 2, the first element 21 can be connected to the second element 22 by means of a hinge 23. This is, for example, the case of the element set 2 shown in figures [Fig. 1] to [Fig. 6]. For the sake of clarity in the drawings, and so as not to overload them with references, the hinge 23 is only referenced in figure [Fig. 2]. Nevertheless, the hinge 23 is clearly visible in all figures [Fig. 1] to [Fig. 6].

[0065] In a second embodiment, the set of elements 2 is without a hinge. The first element 21 and the second element 22 can then be completely free from each other when they are decoupled.

[0066] The set of elements 2 can, in particular, take the form of a cap. The first element 21 can then take the form of a cap seal. The second element 22 can take the form of a cap body. The cap body is generally intended to be fixed to a container. The seal is generally intended to be moved from a position coupled with said body to a position decoupled from said body, and vice versa. The position of the seal coupled with the body, generally called the "closed position," allows the contents arranged inside the container to be retained when the cap is fixed to said container. The position of the seal decoupled from the body, generally called the "open position," allows the contents arranged inside the container to be emptied from said container when the cap is fixed to said container.

[0067] Elements 21, 22 of set of elements 2 can be made of plastic, composite material or any other material suitable to a person skilled in the art.

[0068] Elements 21, 22 of element set 2 are generally molded in an injection mold 3.

[0069] The coupling device 1 is, moreover, and as schematically shown in Figure 2, intended to be fitted to the injection mold 3. As such, the coupling device 1 can be mounted on an element of the injection mold 3, for example, a frame of said injection mold, a cavity holder of said injection mold, or on any other element of said injection mold suitable to those skilled in the art. The coupling device 1 can be fixed to the injection mold element 3 by a fastening system. This fastening system may include a screw fastening device, and / or a push-fit fastening device, and / or a clip fastening device, and / or any other fastening device suitable to those skilled in the art.

[0070] The coupling device 1 includes a frame 11. The frame may be made of metal, composite material, or any other material suitable to those skilled in the art. The frame may take various forms suitable to those skilled in the art. As such, the frame 11 may incorporate all or part of the fastening system.

[0071] The coupling device 1 also includes an engagement member 12. The latter is intended to cooperate with the first element 21 of one or more sets of elements 2. When the engagement member 12 cooperates with the first element 21 of several sets of elements 2, the latter can be arranged in one row, in several rows, or in any other arrangement suitable to a person skilled in the art.

[0072] The engagement member 12 may include one engagement element per set of elements 2. The engagement element is intended to cooperate with the first element 21 of at least one set of elements 2. For example, the engagement element may be configured to exert contact pressure on the first element 21 of at least one set of elements 2.

[0073] As shown in Figures [Fig. 1] to [Fig. 7], the engagement element can be in the form of a bar 121. This bar can be adapted to exert contact pressure on the first element of at least one set of elements. The bar 121 can be solid or hollow.

[0074] In one embodiment, the bar 121 may include a central part 122. The latter may be cylindrical with a circular cross-section.

[0075] The central part 122 can have a length between 100 mm and 1000 mm. The central part 122 can have a maximum diameter between 5 mm and 40 mm.

[0076] Alternatively, the section of the central part 122 may be square, oval, hexagonal, or any other shape suitable to a person skilled in the art.

[0077] The 121 bar can be made of metal, plastic, composite material, ceramic, or any other material suitable to a person skilled in the art.

[0078] The central part 122 may include a contact surface intended to come into contact with the first element 21. In order to reduce the risk that the contact between the engagement member 12 and the first element 21 may cause visible scratches on the surface of said first element, the contact surface may be ground.

[0079] In one embodiment, the central portion 122 may include a coating. The contact surface is then aligned with the surface of the coating. The coating may be made of metal, plastic, composite material, or any other material suitable to those skilled in the art. The outer surface of the coating may be ground.

[0080] In an alternative embodiment shown in Figure 7, the bar 121 may include a sleeve 123 arranged around the central portion 122. The contact surface is then arranged to the surface of the sleeve 123. The latter may be made of metal, plastic, composite material, ceramic, or any other material suitable to those skilled in the art. The outer surface of the sleeve 123 may be ground. The sleeve 123 may be arranged fixed relative to the central portion 122. In another embodiment, the sleeve 123 may be arranged to rotate about the central portion 122.

[0081] When the engagement member 12 cooperates with the first element 21 of several sets of elements 2, the bar 121 may include several sleeves 123, each of said sleeves being intended to come into contact with the first element 21 of one of the sets of elements 2. In an alternative embodiment, the sleeve 123 has a length enabling it to come into contact with the first element 21 of all the sets of elements 2 arranged on the same row.

[0082] In another embodiment, the engagement element may be in the form of a finger per set of elements 2. Similar to the bar 121 described previously, each finger may include a contact surface intended to come into contact with the first element 21. Each finger may be made of the same materials as the bar described previously. Also, each finger may or may not have a coating and may or may not include a ground contact surface. When the engagement member 12 comprises several fingers, these may be arranged along a ramp. This ramp is made of the same materials as the bar 121 described previously.

[0083] In another embodiment, the engagement element can be in the form of a molded part consisting of a set of elements 2. The molded part is configured to define at least a portion of the first element 21. The molded part is configured to cooperate with the mold parts of the injection mold 3 so as to define the mold cavity of the set of elements 2. Once the set of elements 2 has been molded, the injection mold 3 is opened. During this opening step, the first element 21 remains in position on the molded part. This positioning can be achieved, in particular, by friction. The first element 21 can then be moved into a position coupled with the second element 22. Once coupled, the holding force of the coupling is sufficient to allow the first element 21 to detach from the molded part when the latter retracts.Each molded part can be made of the same materials as the bar described above. When the engagement member 12 comprises several molded parts, these can be arranged along a ramp. This ramp is made of the same materials as the bar 121 described above.

[0084] In other embodiments, the engagement organ 12 may take any other form suitable to a person skilled in the art.

[0085] The coupling device 1 includes a first cam 13. The latter can be made of metal, plastic, composite material, ceramic, or any other material suitable to a person skilled in the art.

[0086] The first cam 13 is mounted movable relative to the frame 11. As such, the frame 11 may include a guide member 111. The latter may cooperate with the first cam 13 so as to guide said first cam in its movement.

[0087] Referring to figures [Fig.1] to [Fig.7], the first cam 13 can be mounted to move in translation relative to the frame 11 along a first direction of translation Dt1. This can be rectilinear, as in the embodiment shown in [Fig.1] to [Fig.7].

[0088] The guide element 111 can then include a rail 112, inside which the first cam 13 can translate.

[0089] Alternatively, the first direction of translation Dt1 can be curvilinear.

[0090] In one embodiment, the first cam 13 can be mounted to rotate freely relative to the frame 11.

[0091] The first cam 13 cooperates with the engagement member 12 in such a way as to guide said engagement member according to a first profile.

[0092] The latter can be planar, as in the embodiment shown in [Fig1 ] to [Fig.7],

[0093] Alternatively, the first profile can be curved. For the purposes of this invention, a "curved profile" means a profile that is not a flat surface. In particular, the first profile can be a ruled surface with a curved directrix. For the purposes of this invention, a "curved directrix" means a directrix that is not a straight curve.

[0094] According to an embodiment shown in [Fig1] to [Fig.6], the first cam 13 can include a first plate 131. The latter can have a length between 50 mm and 1000 mm, a width between 30 mm and 250 mm and a thickness between 3 mm and 50 mm.

[0095] The first plate 131 may include a first recess. This recess may include at least one first edge extending along the first profile. The first recess may be obtained by machining, and / or by cutting, and / or by molding, and / or by any other manufacturing process suitable to those skilled in the art. The first recess may or may not be through. The first recess may have a length between 10 mm and 250 mm, a width between 5 mm and 40 mm, and a depth between 3 mm and 50 mm.

[0096] In one embodiment, as shown in figures [Fig.1] to [Fig.6], the first housing takes the form of a first light 132 arranged in the first plate 131.

[0097] In order to cooperate with the first cam 13, the engagement member 12 may include a first cam follower 124. This follower may cooperate with the first edge. In particular, the first cam follower 124 may be mounted to move in translation on the first cam 13 and along the first edge, so as to form a sliding connection.

[0098] In other words, the first cam follower 124 can be in sliding connection with the first cam 13 along the first edge.

[0099] The first cam follower 124 can be in the form of a first roller configured to move along the first edge.

[0100] In one embodiment and as shown in figure [Fig.7], the first pebble may have a cylindrical shape with a square cross-section.

[0101] In variations of the design, the cross-section of the first roller may be circular, oval, or of any other shape suitable to a person skilled in the art.

[0102] The first roller can have a side or diameter between 5 mm and 40 mm and a thickness between 3 mm and 50 mm.

[0103] When the first cam 13 includes a first plate 131 on which a first housing is provided as previously described, the first roller, in one embodiment, has dimensions enabling it to be inserted inside said first housing. In one embodiment, the first roller may be configured to roll inside the first housing. In another embodiment, as shown in Figure [Fig. 7], the first roller may be configured to slide inside the first housing. In this case, the surface of the first roller in contact with the first housing may be ground. In an alternative embodiment, the surface of the first roller in contact with the first housing may have a coating to facilitate sliding. This coating may be made of metal, plastic, composite material, ceramic, or any other material suitable to those skilled in the art.Similarly, the surface of the first housing in contact with the first roller can be ground. In an alternative embodiment, the surface of the first housing in contact with the first roller may have a coating to promote sliding. This coating may be made of metal, plastic, composite material, ceramic, or any other material suitable to those skilled in the art.

[0104] When the engagement member 12 includes a bar 121 as previously described, said bar can be mounted freely for rotation on the first cam follower 124. In particular, when the first cam follower 124 is a first roller as previously described, the bar can be mounted freely for rotation on said first cam follower by means of a bearing, a plain bearing, or any other bearing suitable to those skilled in the art. In practice, the axis of rotation can coincide with the longitudinal axis of symmetry of the bar 121.

[0105] When the engagement member has a portion offset from the center of gravity of the first cam 13, the coupling device 1 may include a first parallel cam 13'. The first parallel cam 13' cooperates with the engagement member 12 so as to guide said engagement member along the same first profile. Thus, the forces exerted on the engagement member 12 can be distributed between the first cam 13 and the first parallel cam 13', each of which guides said engagement member 12 in parallel.

[0106] In one embodiment, the first parallel cam 13' has a mirror image of the first cam 13. The first parallel cam 13' may, in particular, have a shape, dimensions, and be made of materials similar to the first cam 13. The first parallel cam 13' may also be mounted to move relative to the frame 11 in a translational or rotational motion identical to that of the first cam 13. Specifically, the frame 11 may include a parallel guide element 11T. This guide element may cooperate with the first parallel cam 13' so as to guide the first parallel cam in its movement. When the first cam 13 is mounted to move in translation, the first parallel cam 13' may be mounted to move in translation relative to the frame 11 along a first parallel direction of translation DtT parallel to the first direction of translation Dt1.The parallel guide element 111' can then include a parallel rail 112', inside which the first parallel cam 13' can translate.

[0107] According to an embodiment shown in [Fig. 1] to [Fig. 6], the first parallel cam 13' may include a first parallel plate 13T. The latter may have dimensions similar to the first plate 131. Like the first plate 131, the first parallel plate 13T may include a first parallel housing comprising at least one first parallel edge according to the first profile. The first parallel housing may have a shape, dimensions, and be obtained by manufacturing processes identical to the first housing. In particular, the first parallel housing may take the form of a first parallel slot 132' formed in the first parallel plate 13T.

[0108] In order to cooperate with the first parallel cam 13', the engagement member 12 may include a first parallel cam follower 124'. This follower can then cooperate with the first parallel edge. In particular, the first parallel cam follower 124' can be mounted for translational movement on the first parallel cam 13' and along the first parallel edge to form a sliding connection.

[0109] In other words, the first parallel cam follower 124' can be in sliding connection with the first parallel cam 13' along the first parallel edge.

[0110] The first parallel cam follower 124' can have a shape, dimensions, and be made of materials similar to the first cam follower 124.

[0111] When the engagement member 12 includes a bar 121, as in the embodiment described above, said bar can be mounted freely for rotation on the first parallel cam follower 124' in a similar manner to the first cam follower 124.

[0112] The coupling device 1 includes a second cam 14. The latter can be made of metal, plastic, composite material, ceramic, or any other material suitable to a person skilled in the art.

[0113] The second cam 14 is mounted to move relative to the frame 11. As such, the frame 11 may include a guide member 111. This guide member may cooperate with the second cam 14 so as to guide the second cam in its movement. In the embodiment shown in Figures [Fig. 1] to [Fig. 6], a single guide member 111 guides both the first cam 13 and the second cam 14. In an alternative embodiment, the frame 11 may include two guide members 111, one guiding the first cam 13 and the other guiding the second cam 14.

[0114] In an embodiment shown in Figures [Fig. 1] to [Fig. 7], the second cam 14 can be mounted to move in translation relative to the frame 11 along a second translation direction Dt2. In one embodiment, the translation direction Dt2 is parallel to the first translation direction Dt1. In another embodiment, the first translation direction Dt1 and the second translation direction Dt2 are coplanar in a translation plane, intersecting, and form an intertranslation angle greater than 0° between them in the translation plane. This intertranslation angle can, in particular, be equal to 90°. The translation direction Dt2 can be rectilinear, as in the embodiment shown in [Fig. 1] to [Fig. 7]. The first cam 13 and the second cam 14 can then translate side by side in the guide member 11.The guide member 111 can then include a rail 112 within which the second cam 14 can translate alongside the first cam 13. In this case, the engagement member 12 can be configured to pass through the first cam 13 via the first slot 132 and / or the second cam 14 via the second slot 132. Alternatively, the second direction of translation Dt2 can be curved. In one embodiment, the second cam 14 can be mounted to rotate freely relative to the frame 11.

[0115] The second cam 14 cooperates with the engagement member 12 so as to guide said engagement member along a second profile. This second profile differs from the first profile. The second profile may be planar, as in the embodiment shown in [Fig. 1] to [Fig. 7]. Alternatively, the second profile may be curved. In particular, the second profile may be a ruled surface with a curved directrix. Advantageously, when, on the one hand, the first profile is a ruled surface with a curved directrix and, on the other hand, the second profile is a ruled surface with a curved directrix, the first profile may have a first generatrix and the second profile may have a second generatrix parallel to the first generatrix. In particular, the first and second generatrices may be parallel to the longitudinal axis of symmetry of the bar 121.

[0116] When the first and second profiles are planar, they may intersect and form an inter-profile angle. Advantageously, the inter-profile angle is between 15° and 165°.

[0117] In one embodiment, the inter-profile angle is equal to 90°. According to an embodiment shown in figures [Fig.1] to [Fig.6], the second cam 14 may include a second plate 141. The second plate 141 may have dimensions similar to the first plate 131.

[0118] In the description, the terms "first" and "second" are used to differentiate objects from the perspective of a global frame of reference. Thus, the term "second" preceding the term "plate" indicates that the plate is related to the second cam 14. The term "second," however, does not provide any indication of the number of plates that comprise the second cam 14. The same applies throughout the description to elements related to the second cam 14, for example, the "second edge," the "second housing," the "second profile," the "second light," etc. This is consistent regardless of the object being considered in the description.

[0119] The second plate 141 may have a second recess. This recess may have at least one second edge extending along the second profile. The second recess may be obtained by machining, and / or cutting, and / or molding, and / or any other manufacturing process suitable to those skilled in the art. The second recess may or may not be through. The second recess may have a length between 10 mm and 250 mm, a width between 5 mm and 40 mm, and a depth between 3 mm and 50 mm.

[0120] In one embodiment, as shown in figures [Fig.1] to [Fig.6], the second housing takes the form of a second light 142 arranged in the second plate 141.

[0121] In order to cooperate with the second cam 14, the engagement member 12 may include a second cam follower 125. This follower may cooperate with the second edge. In particular, the second cam follower 125 may be mounted for translational movement on the second cam 14 and along the second edge, so as to form a sliding connection.

[0122] In other words, the second cam follower 125 can be in sliding connection with the second cam 14 along the second edge.

[0123] In one embodiment shown in Figures [Fig. 1] to [Fig. 6], the first cam follower 124 and the second cam follower 125 can be mounted on the same axis of the engagement member 12, said axis passing through the first slot 132 and the second slot 142. The second cam follower 125 can be in the form of a second roller configured to move along the second edge. In one embodiment, and as shown in Figure [Fig. 7], the second roller can have a cylindrical shape with a square cross-section. In alternative embodiments, the cross-section of the second roller can be circular, oval, or any other shape suitable to those skilled in the art. The second roller can have dimensions similar to the first roller described above.

[0124] When the second cam 14 includes a second plate 141 on which a second housing is provided as previously described, the second roller, in one embodiment, has dimensions enabling it to be inserted inside said second housing. In one embodiment, the second roller may be configured to roll inside the second housing. In another embodiment, as shown in Figure [Fig. 7], the second roller may be configured to slide inside the second housing. In this case, the surface of the second roller in contact with the second housing may be ground. In an alternative embodiment, the surface of the second roller in contact with the second housing may have a sliding coating made of metal, plastic, composite material, ceramic, or any other material suitable to those skilled in the art.Similarly, the surface of the second housing in contact with the second roller can be ground. In one embodiment, the surface of the second housing in contact with the second roller may have a sliding coating made of metal, plastic, composite material, ceramic, or any other material suitable to those skilled in the art.

[0125] When the engagement member 12 includes a bar 121 as previously described, said bar can be mounted freely for rotation on the second cam follower 125. In particular, when the second cam follower 125 is a second roller as previously described, the bar can be mounted freely for rotation on the second cam follower 125 by means of a bearing, a plain bearing or any bearing means suitable to a person skilled in the art.

[0126] When the engagement member has a portion offset from the center of gravity of the second cam 14, the coupling device 1 may include a second parallel cam 14'. The second parallel cam 14' cooperates with the engagement member 12 so as to guide said engagement member along the same second profile. Thus, the forces exerted on the engagement member 12 can be distributed between the second cam 14 and the second parallel cam 14', each of which guides said engagement member 12 in parallel.

[0127] In one embodiment, the second parallel cam 14' has a mirror image of the second cam 14. The second parallel cam 14' may, in particular, have the same dimensions and be made of similar materials as the second cam 14. The second parallel cam 14' may also be mounted to move relative to the frame 11 in a translational or rotational motion identical to that of the second cam 14. Specifically, the frame 11 may include a parallel guide member 111'. This guide member may cooperate with the second parallel cam 14' so as to guide the second parallel cam in its movement. As before, a single parallel guide member 11T can guide both the first parallel cam 13' and the second parallel cam 14'. In another embodiment, the frame 11 may include two parallel guide members 11T, one guiding the first parallel cam 13' and the other guiding the second parallel cam 14'.When the second cam 14 is mounted to move in translation, the second parallel cam 14' can be mounted to move in translation relative to the frame 11 along a second parallel direction of translation Dt2' parallel to the second direction of translation Dt2. The first parallel cam 13' and the second parallel cam 14' can then translate side by side in the parallel guide member 11 T. The latter may then include a parallel rail 112' within which the second parallel cam 14' can translate alongside the first parallel cam 13'.

[0128] According to an embodiment shown in [Fig. 1] to [Fig. 6], the second parallel cam 14' may include a second parallel plate 14T. The latter may have dimensions similar to the second plate 141. Like the second plate 141, the second parallel plate 14T may include a second parallel housing comprising at least one second parallel edge according to the second profile. The second parallel housing may have the same shape and dimensions, and be obtained by manufacturing processes as the second housing. In particular, the second parallel housing may take the form of a second parallel slot 142' formed in the second parallel plate 14T.

[0129] In order to cooperate with the second parallel cam 14', the engagement member 12 may include a second parallel cam follower 125'. This follower can then cooperate with the second parallel edge. In particular, the second parallel cam follower 125' can be mounted for translational movement on the second parallel cam 14' and along the second parallel edge, so as to form a sliding connection.

[0130] In other words, the second parallel cam follower 125' can be connected to the second parallel cam 14' along its second edge. The second parallel cam follower 125' can have a similar shape, similar dimensions, be made of similar materials, and be arranged similarly to the second cam follower 125'.

[0131] In particular, in an embodiment shown in figures [Fig.1] to [Fig.6], the first parallel cam follower 124' and the second parallel cam follower 125' can be mounted on the same axis of the engagement member 12, said axis passing through the first parallel light 132' and the second parallel light 142'.

[0132] When the engagement member 12 includes a bar 121 as previously described, said bar can be mounted freely for rotation on the second parallel cam follower 125' in a similar manner to the second cam follower 125.

[0133] The coupling device 1 includes an executing member 15. The latter cooperates with the first cam 13 and with the second cam 14, optionally with the first parallel cam 13', and optionally with the second parallel cam 14'. The executing member 15 is configured to generate at least one displacement of said first cam relative to the frame 11, and / or at least one displacement of said second cam relative to said frame, optionally of said first parallel cam relative to said frame, optionally of said second parallel cam relative to said frame, so as to generate at least one displacement of the engagement member 12 allowing, for each of the several sets of elements 2, by cooperation with the first element 21, to move said first element relative to the second element 22 from a decoupled position, as shown in Figure [Fig. 1], to a coupled position, as shown in Figure [Fig. 6].

[0134] According to one embodiment, the executing member 15 may include a first drive device. The first drive device is configured to move the first cam 13 relative to the frame 11.

[0135] In one embodiment, the drive device may include a first rack 151. This rack may cooperate with the first cam 13 so as to move the first cam when the first rack moves. In particular, the first rack 151 may be fixed to the first cam 13. The drive device may include a first pinion. This pinion may be mounted to rotate relative to the frame 11. The first pinion is located inside the guide member 111 at the end of the first shaft 155. The first pinion may cooperate with the first rack 151 so as to move the first rack in translation when the first pinion is driven in rotation. The drive device may include a first electric motor 152. This motor may be connected, directly or indirectly, to the first pinion so as to drive the first pinion.In one embodiment, as shown in Figures [Fig.1] to [Fig.6], the first electric motor 152 can cooperate with a first gearbox 153. The latter can cooperate with a second pinion 154. The latter can be mounted on a first shaft 155. The first pinion can also be mounted on the first shaft 155. Thus, the first electric motor 152 is connected to the first pinion via the first gearbox 153, the second pinion 154, and the first shaft 155.

[0136] Therefore, when the first electric motor 152 rotates in its first direction of rotation, the first pinion is driven in its first direction of rotation. The first pinion then drives the first rack 151, and thus the first cam 13, in a translational movement along its first direction of rotation. Conversely, when the first electric motor 152 rotates in a second direction of rotation, opposite to the first direction of rotation, the first pinion is driven in its second direction of rotation, opposite to the first direction of rotation. The first pinion then drives the first rack 151, and thus the first cam, in a translational movement along its second direction of rotation, opposite to the first direction of rotation.

[0137] In alternative embodiments, the drive device may include a motor and / or a cylinder and / or any other actuator suitable to a person skilled in the art, as well as any motion transmission element suitable to a person skilled in the art, for example a pinion, cardan joint, right-angle drive, etc.

[0138] In other words, generally speaking, the drive device may include a first actuator to drive a first motion transmission element cooperating with the first cam so as to move the first cam relative to the frame when the first actuator drives the first transmission element.

[0139] According to one embodiment, the drive device may include a first actuator to drive a first motion transmission element cooperating with the first cam so as to move the first cam in translation relative to the frame when the first actuator drives the first transmission element.

[0140] When the coupling device 1 includes a first parallel cam 13', the first drive device can be configured to move the first parallel cam 13' relative to the frame 11. In one embodiment, the drive device may include a first parallel rack 15T. This rack can cooperate with the first parallel cam 13' so as to move said first parallel cam when said first parallel rack moves. In particular, the first parallel rack 15T can be integral with the first parallel cam 13'. The pitch of the first parallel rack 15T is equal to the pitch of the first rack 151. The drive device may include a first parallel pinion. This pinion can be mounted to rotate relative to the frame 11. The first parallel pinion is located inside the parallel guide member 111' at the end of the first shaft 155.The first parallel pinion can cooperate with the first parallel rack 15T so as to move said first parallel rack in translation when said first parallel pinion is driven in rotation. Advantageously, the diameter of the first parallel pinion is equal to the diameter of the first pinion. Similarly, the pitch of the first parallel pinion is equal to the pitch of the first pinion. The first parallel pinion can also be mounted on the first shaft 155. Thus, the first electric motor 152 is connected to the first parallel pinion via the first gearbox 153, the second pinion 154, and the first shaft 155.

[0141] Therefore, when the first electric motor 152 rotates in the first direction of motor rotation, the first pinion and the first parallel pinion are driven simultaneously in the first pinion direction of rotation. The first pinion and the first parallel pinion then simultaneously drive the first rack 151, respectively the first parallel rack 151, and thus the first cam 13, respectively the first parallel cam 13', in a translational movement along the first direction of translation. Conversely, when the first electric motor 152 rotates in the second direction of motor rotation, the first pinion and the first parallel pinion are driven simultaneously in the second pinion direction of rotation.The first pinion and the first parallel pinion then simultaneously drive the first rack 151, respectively the first parallel rack 151', and therefore the first cam 13, respectively the first parallel cam 13', in a translational movement along the second direction of translation.

[0142] Thus, for a first pinion and a first parallel pinion of identical diameter and pitch, and a first rack 151 and a first parallel rack 15T of identical pitch, the first electric motor 152 can simultaneously move the first cam 13 and the first parallel cam 13' in a translational movement in parallel directions, of the same sense, and of the same amplitude. In other words, generally, the first actuator can drive another first motion transmission element cooperating with the first parallel cam so as to move the first parallel cam relative to the frame when the first actuator drives the first transmission element.

[0143] According to one embodiment, the first actuator can drive another first motion transmission element cooperating with the first parallel cam so as to move the first parallel cam in translation relative to the frame, when the first actuator drives the first transmission element.

[0144] According to one embodiment, the drive device can cooperate with the first cam 13 and the first parallel cam 13' and be configured so as to move the first cam 13 and the first parallel cam 13' simultaneously, in a translational movement in parallel directions, of the same sense, and of the same amplitude.

[0145] In one embodiment, the executing unit 15 may comprise:

[0146] - a first drive device configured to move the first cam 13 relative to the frame 11, and

[0147] - a first parallel drive device configured to move the first parallel cam 13' relative to the frame 11.

[0148] The first parallel drive device may be of similar design to the first drive device. The executing member 15 may then include a synchronizing device configured to synchronize the first drive device and the first parallel drive device so that the first cam 13 and the first parallel cam 13' move parallel to each other in the same direction and with the same amplitude.

[0149] According to one embodiment, the executing member 15 may include a second drive device. The second drive device is configured to move the second cam 14 relative to the frame 11.

[0150] In one embodiment, the drive device may include a second rack 156. This rack may cooperate with the second cam 14 so as to move the second cam when the second rack moves. In particular, the second rack 156 may be fixed to the second cam 14. The drive device may include a third pinion. This pinion may be mounted to rotate relative to the frame 11. The third pinion is located inside the guide member 111 at the end of the second shaft 159. The third pinion may cooperate with the second rack 156 so as to move the second rack in translation when the third pinion is driven in rotation. The drive device may include a second electric motor 157. This motor may be connected, directly or indirectly, to the third pinion so as to drive the third pinion.In one embodiment, as shown in Figures [Fig. 1] to [Fig. 6], the second electric motor 157 can cooperate with a second gearbox 158. The latter can cooperate with a fourth pinion. This pinion can be mounted on a second shaft 159. The third pinion can also be mounted on the second shaft 159. Thus, the second electric motor 157 is connected to the third pinion via the second gearbox 158, the fourth pinion, and the second shaft 159.

[0151] Therefore, when the second electric motor 157 rotates in the first direction of rotation, the third pinion is driven in the first direction of rotation. The third pinion then drives the second rack 156, and thus the second cam 14, in a translational movement along the first direction of translation. Conversely, when the second electric motor 157 rotates in the second direction of rotation, opposite to the first direction of rotation, the third pinion is driven in the second direction of rotation, opposite to the first direction of rotation. The third pinion then drives the second rack 156, and thus the second cam, in a translational movement along the second direction of translation, opposite to the first direction of translation.

[0152] In alternative embodiments, the drive device may include a motor and / or a cylinder and / or any other actuator suitable to a person skilled in the art, as well as any motion transmission element, for example a pinion, cardan joint, right-angle gearbox, etc.

[0153] In other words, generally speaking, the drive device may include a second actuator to drive a second motion transmission element cooperating with the second cam so as to move the second cam relative to the frame when the second actuator drives the second transmission element.

[0154] In one embodiment, the drive device may include a second actuator for driving a second motion transmission element cooperating with the second cam so as to move the second cam in translation relative to the frame when the second actuator drives the second transmission element. When the coupling device 1 includes a second parallel cam 14', the second drive device may be configured to move the second parallel cam 14' relative to the frame 11.

[0155] In one embodiment, the drive device may include a second parallel rack 156'. This rack may cooperate with the second parallel cam 14' so as to move said second parallel cam when said second parallel rack moves. In particular, the second parallel rack 156' may be fixed to the second parallel cam 14'. The pitch of the second parallel rack 156' is equal to the pitch of the second rack 156. The drive device may include a third parallel pinion. This pinion may be mounted to rotate relative to the frame 11. The third parallel pinion is located inside the parallel guide member 11T at the end of the second shaft 159. The third parallel pinion may cooperate with the second parallel rack 156' so as to move said second parallel rack in translation when said third parallel pinion is driven in rotation.Advantageously, the diameter of the third parallel gear is equal to the diameter of the third gear. Similarly, the pitch of the third parallel gear is equal to the pitch of the third gear. The third parallel gear can also be mounted on the second shaft 159. Thus, the second electric motor 157 is connected to the third parallel gear via the second gearbox 158, the fourth gear, and the second shaft 159.

[0156] Therefore, when the second electric motor 157 rotates in the first direction of motor rotation, the third pinion and the third parallel pinion are driven simultaneously in the first direction of pinion rotation. The third pinion and the third parallel pinion then simultaneously drive the second rack 156, and thus the second cam 14, and the second parallel cam 14', respectively, in a translational movement along the first direction of translation. Conversely, when the second electric motor 157 rotates in the second direction of motor rotation, the third pinion and the third parallel pinion are driven simultaneously in the second direction of pinion rotation.The third pinion and the third parallel pinion then simultaneously drive the second rack 156, respectively the second parallel rack 156', and therefore the second cam 14, respectively the second parallel cam 14', in a translational movement along the second direction of translation.

[0157] Thus, for a third pinion and a third parallel pinion of identical diameter and pitch, and a second rack 156 and a second parallel rack 156' of identical pitch, the second electric motor 157 can simultaneously move the second cam 14 and the second parallel cam 14', in a translational movement of parallel directions, of the same sense, and of the same amplitude.

[0158] In other words, generally speaking, the second actuator can drive another second motion transmission element cooperating with the second parallel cam so as to move the second parallel cam relative to the frame when the second actuator drives the second transmission element.

[0159] According to one embodiment, the second actuator can drive another second motion transmission element cooperating with the second parallel cam so as to move the second parallel cam in translation relative to the frame, when the second actuator drives the second transmission element.

[0160] According to one embodiment, the drive device can cooperate with the second cam 14 and the second parallel cam to simultaneously move the second cam 14 and the second parallel cam 14', in a translational movement in parallel directions, of the same sense, and of the same amplitude.

[0161] In one embodiment, the executing unit 15 may comprise:

[0162] - a second drive device configured to move the second cam 14 relative to the frame 11, and

[0163] - a second parallel drive device configured to move the second parallel cam 14' relative to the frame 11.

[0164] The second parallel drive device may be of similar design to the second drive device. The executing member 15 may then include a synchronizing device configured to synchronize the second drive device and the second parallel drive device, so that the second cam 14 and the second parallel cam 14' move in parallel in the same direction and with the same amplitude.

[0165] By moving the first cam 13, possibly combined with the movement of the first parallel cam 13', and / or moving the second cam 14, possibly combined with the movement of the second parallel cam 14', the executing member 15 can move from the engagement member 12 in a wide variety of ways.

[0166] For example, in the embodiment shown in Figures [Fig. 1] to [Fig. 6], when the first cam 13 and the second cam 14 are moved simultaneously in the same direction, at the same speed, and by the same amplitude, the engagement member 12 moves along the x-axis in the same direction and by the same amplitude. Similarly, when the first cam 13 and the second cam 14 are moved simultaneously in opposite directions, at the same speed and by the same amplitude, the engagement member 12 moves along the z-axis by the same amplitude. Likewise, when the first cam 13 is moved and the second cam 14 is held stationary, the engagement member 12 moves along the second profile. Conversely, when the first cam 13 is held stationary and the second cam 14 is moved, the engagement member 12 moves along the first profile.

[0167] By varying the directions, speeds and amplitudes of displacement of each of the first cam 13 and the second cam 14, the engagement member 12 can thus be moved according to complex displacement profiles P.

[0168] According to one embodiment, the execution member 15 may include a control device configured to control one or more actuators of the drive device so as to obtain a displacement of the engagement member 12 according to a desired displacement profile P.

[0169] For example, the control device can be configured to control the direction of rotation, rotational speed, and rotational time of the first electric motor 152 and the second electric motor 157 so as to obtain a displacement of the engagement member 12 according to a desired, i.e., predetermined, displacement profile P. This control device may include a microprocessor and a storage memory in which a computer program is stored. When executed by the microprocessor, the computer program can be configured to send one or more initial motor commands to the first electric motor 152, and one or more subsequent motor commands to the second electric motor 157.The first motor command(s) and second motor command(s) allow control of the direction of rotation, the speed of rotation and the duration of rotation of the first electric motor 152, respectively of the second electric motor 157 so as to obtain a displacement of the engagement member 12 according to a desired displacement profile P.

[0170] The control device may also be equipped with a user interface. This interface may include a screen and / or a touch screen, and / or a mouse, and / or a keyboard, and / or any other user interface element suitable for a person skilled in the art.

[0171] The control device can then be configured to allow a user, via the user interface, to save one or more P displacement profiles and / or select a desired P displacement profile from several saved P displacement profiles.

[0172] A complex displacement profile P, enabling the first element (or each of the several sets of elements 2) to be moved, through cooperation between the engagement member 12 and the first element 21, from a decoupled position to a coupled position relative to the second element 22, is schematically represented in Figure [Fig. 7]. This displacement profile P can, for example, be decomposed into four sub-profiles. Initially, the engagement member 12 moves along a first sub-profile P1, from an initial position, shown in Figures [Fig. 1] and [Fig. 2], to a final position located below the first element 21 of the set of elements 2. Subsequently, the engagement member 12 moves along a second sub-profile P2, from the final position of sub-profile P1, to a position located above the second element 22 of the set of elements 2.During this movement, the engagement member 12 comes into contact with the first element 21 and exerts a force on it, causing the first element 21 to move progressively relative to the second element 22. The first element 21 passes, firstly, through a first position shown in Figures [Fig. 3] and [Fig. 4]. The first element 21 then passes through a second position shown in Figure [Fig. 5]. The first element 21 finally reaches a final position coupled with the second element 22, as illustrated in Figure [Fig. 6]. In a third step, the engagement member 12 moves along a third sub-profile P3, from the final position of sub-profile P2, to a position distant from the set of elements 2. In a fourth step, the engagement member 12 moves along a fourth sub-profile P4, from the final position of sub-profile P3, to the initial position of the sub-profile P1 passing over element set 2.

[0173] During the coupling operation of the first element 21 with the second element 22, the latter can, for example, be held in position in the injection mold 3. This holding in position can be ensured by the contact interaction, in particular due to friction, between the second element 22 and the injection mold 3 in which it was molded.

[0174] In one embodiment, the coupling device 1 may comprise several coupling assemblies. Each coupling assembly may be associated with a set of element sets 2. Each coupling assembly may include an engagement member 12 similar to that described above. Each coupling assembly may also include a first cam 13 similar to that described above, and optionally a first parallel cam 13' similar to that described above. Each coupling assembly may also include a second cam 14 similar to that described above, and optionally a second parallel cam 14' similar to that described above.

[0175] The executing member 15 can then cooperate with the first cam 13, with the second cam 14, optionally with the first parallel cam 13', and optionally with the second parallel cam 14' of each of the coupling assemblies. The executing member 15 can thus be configured to jointly generate at least one displacement of all the first cams 13, optionally all the first parallel cams 13', relative to said frame 11. The executing member 15 can also be configured to jointly generate at least one displacement of all the second cams 14, optionally all the second parallel cams 14', relative to the frame 11. By the displacement of the first cams

[0176] 13, possibly the first parallel cams 13', and / or the second cams

[0177] 14, and possibly second parallel cams 14', the actuating member 15 generates at least one displacement of the engagement member 12 of each coupling assembly according to the same displacement profile P. Thus, for each of the sets of elements 2 of the set of sets of elements 2 associated with each coupling assembly, the engagement member 12, in cooperation with the first element 21, displaces said first element relative to the second element 22 from a decoupled position to a coupled position. It is therefore possible to couple the first element 21 and the second element 22 of several rows of sets of elements 2. The engagement member 12 of each coupling assembly can then be dedicated to one row of sets of elements 2.

[0178] In one embodiment, the coupling device 1 comprises an operating member 15 for each coupling set. This allows the engagement member 12 of each coupling set to be moved independently according to its own specific movement profile. This embodiment can, for example, allow the coupling of the first element 21 and the second element 22 of several types of element sets 2, in particular, of different shapes and / or dimensions. The engagement member 12 of each coupling set can then be dedicated to a row of element sets 2 of a particular type.

[0179] Another aspect of the invention relates to an injection mold 3 for molding at least one set of elements 2. The injection mold comprises a first mold part configured to define a first part of the element set(s). The injection mold comprises a second mold part configured to define a second part of the element set(s). The injection mold may also include one or more additional mold parts configured to define one or more additional parts of the element set(s). The part of an element set defined by a mold part may include a portion of the first element 21 and / or a portion of the second element 22. The mold parts are obtained by conventional manufacturing processes, are made of conventional materials, and have cavities of conventional shapes and dimensions.

[0180] The injection mold 3 may include a mold frame on which the mold parts are mounted. At least one mold part may be mounted to move relative to the mold frame. The other parts may be mounted to be fixed relative to the mold frame. Thus, the movable mold part(s) may be moved between:

[0181] — a closed mold position in which the total impression of at least one set of elements 2 is formed, and

[0182] — an open mold position in which at least part of the first element 21 is accessible so that it can be maneuvered from its decoupled position with the second element 22 to its coupled position with said second element.

[0183] This injection mold 3 is notable in that it also includes a coupling device 1 as described previously. The coupling device 1 can, in particular, and as described previously, be mounted on an element of the injection mold 3, and specifically the mold frame. The coupling device 1 can be arranged on the injection mold element 3 so that the executing member 15 can move the engaging member 12 between:

[0184] — a resting space within which the said engagement mechanism does not impede the movement of the movable mold parts,

[0185] — a workspace in which said executing element is capable of moving the engagement element to move it according to the desired movement profile P.

[0186] The injection mold 3 may, in particular, include a housing defining the resting space. This housing may, specifically, be located at the initial position of the first sub-profile P1 described previously. The working space may, for its part, be situated between the mold parts when the movable mold parts are in their open mold position.

[0187] Yet another aspect of the invention relates to a method for coupling at least one set of elements 2 molded in an injection mold 3. The coupling method comprises the following steps:

[0188] — a) provide an engagement device 12 intended to cooperate with the first element 21 of one or more sets of elements 2,

[0189] — b) provide a first cam 13 mounted movable relative to the frame 11, said first cam cooperating with said engagement member so as to guide said engagement member along a first profile,

[0190] — c) provide a second cam 14 mounted movable relative to said frame, said second cam cooperating with said engagement member so as to guide said engagement member according to a second profile, said second profile being different from said first profile,

[0191] — d) generate at least one displacement of said first cam and / or at least one displacement of said second cam so as to generate at least one displacement of said engagement member enabling, for said or each of said several sets of elements, by cooperation with said first element, to move said first element relative to said second element from a decoupled position to a coupled position.

[0192] Steps a) to c) can, for example, be implemented by mounting a coupling device 1 as described above on an injection mold 3 as described above, or by any other means of implementation suitable to a person skilled in the art.

[0193] According to one embodiment, step d) may include the following substeps:

[0194] — d1) move a first cam follower 124 of the engagement member 12 along a first edge of a first slot 132 formed on a first plate 131 of the first cam 13, said first edge extending along the first profile, and / or

[0195] — d2) move a second cam follower 125 of the engagement member 12 along a second edge of a second slot 142 arranged on a second plate 141 of the second cam 14, said second edge extending along the second profile.

[0196] According to one embodiment, step d1) may include substep: — d11) move the first cam 13 in translation relative to the frame 11 along a first direction of translation Dt1.

[0197] According to one embodiment, step d2) may include the substep:

[0198] — d21 ) move the second cam 14 translation relative to said frame along a second direction of translation Dt2 parallel to said first direction of translation.

[0199] According to one embodiment, step d11) may include the following substeps:

[0200] — d111) drive in rotation at least a first pinion cooperating with a first rack 151 so as to generate at least one translational displacement of the first cam 13.

[0201] According to one embodiment, step d1) may include the following substeps:

[0202] — d211) drive in rotation at least a second pinion cooperating with a second rack 156 so as to generate at least one translational displacement of the second cam 14.

[0203] Step (d), and its sub-steps, may be implemented by an implementing body 15 as previously described, or by any other means of implementation suitable to a person skilled in the art.

[0204] According to one embodiment, the process may include, prior to step d), for each of the sets of elements 2, the following steps:

[0205] — mold the first element 21 and the second element 22 in an injection mold 3,

[0206] — to maintain in position, in said injection mold, said second element.

[0207] The molding step can be carried out by conventional means. The holding-in step can be carried out by friction between the injection mold 3 and the second element 22 as previously described, or by any other means of implementation suitable to a person skilled in the art.

Claims

32 DEMANDS 1. Coupling device for at least one set of elements (2) molded in an injection mold (3), said coupling device being intended to equip said injection mold, said or each of said sets of elements comprising a first element (21) capable of being coupled with a second element (22), said coupling device comprising: — a building (11), — an engagement device (12) intended to cooperate with said first element of one or more of said sets of elements, — a first cam (13) mounted movable relative to said frame, said first cam cooperating with said engagement member so as to guide said engagement member according to a first profile, characterized in that said coupling device also comprises: — a second cam (14) mounted movable relative to said frame, said second cam cooperating with said engagement member so as to guide said engagement member according to a second profile, said second profile being different from said first profile, — an executing member (15) to generate at least one displacement of said first cam relative to said frame, and / or at least one displacement of said second cam relative to said frame, so as to generate at least one displacement of said engagement member enabling, for said or each of said several sets of elements, by cooperation with said first element, to move said first element relative to said second element from a decoupled position to a coupled position.

2. Coupling device according to claim 1 characterized in that: — the first cam (13) is movable in translation relative to the frame (11) along a first direction of translation (Dt1 ), — the second cam (14) is movable in translation relative to said frame along a second direction of translation (Dt2) parallel to said first direction of translation.

3. Coupling device according to claim 2 characterized in that the executing member (15) comprises: — a first electric motor (152) connected to at least one first pinion cooperating with a first rack (151) so as to generate at least one 33 translational displacement of the first cam (13) under the effect of the motor drive by said at least one first pinion, — a second electric motor (157) connected to at least one second pinion cooperating with a second rack (156) so as to generate at least one translational displacement of the second cam (14) under the effect of the drive of the motor by said at least one first pinion.

4. Coupling device according to any one of the preceding claims, characterized in that: — the first profile is flat, — the second profile is flat, — said first profile and said second profile are intersecting and form between them an inter-profile angle between 15° and 165° with respect to the first.

5. Coupling device according to claim 4 characterized in that the inter-profile angle is equal to 90°.

6. Coupling device according to any one of the preceding claims, characterized in that: — the first cam (13) comprises a first plate (131) in which a first light (132) is provided, said first light comprising at least a first edge extending along the first profile, — the engagement member (12) comprises a first cam follower (124) cooperating with said first edge, — the second cam (14) comprises a second plate (141) in which a second light (142) is provided, said second light having at least one second edge extending along the second profile, — said engagement member includes a second cam follower (125) cooperating with said second edge.

7. Coupling device according to claim 6 characterized in that the engagement member (12) comprises a bar (121) capable of exerting contact pressure on the first element (21) of at least one set of elements (2), said bar being mounted freely in rotation on the first cam follower (124) and being mounted freely in rotation on the second cam follower (125).

8. Coupling device according to any one of the preceding claims characterized in that it comprises several coupling assemblies each associated with a set of element sets (2), each of said coupling assemblies comprising an engagement member (12), a first cam (13) and a second cam (14), and in that the executing member (15) cooperates with said first cam and with said second cam of each of said coupling assemblies so as to jointly generate at least one displacement of all the first cams (13) relative to the frame (11), and jointly at least one displacement of all the second cams (14) relative to said frame.

9. Injection mold for molding at least one set of elements (2), said or each of said sets of elements comprising a first element (21) and a second element (22), said injection mold comprising: — a first part of the mold configured to define a first part of said or each of said sets of elements; — a second mold part configured to define a second part of said or each of said sets of elements; characterized in that said injection mold also comprises a coupling device (1) according to any one of claims 1 to 8.

10. Method for coupling at least one set of elements (2) molded in an injection mold (3), said or each of said sets of elements comprising a first element (21) and a second element (22), said coupling method comprising the following steps: — a) provide an engagement device (12) intended to cooperate with said first element of one or more of said sets of elements, — b) provide a first cam (13) mounted movable relative to a frame (11), said first cam cooperating with said engagement member so as to guide said engagement member along a first profile, — c) provide a second cam (14) movable relative to said frame, said second cam cooperating with said engagement member so as to guide said engagement member along a second profile, said second profile being different from said first profile, — d) generate at least one displacement of said first cam and / or at least one displacement of said second cam so as to generate at least one displacement of said engagement member enabling, for said or each of said several sets of elements, by cooperation with said first element, to move said first element relative to said second element from a decoupled position to a coupled position.

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