Soles for sports shoes, and their manufacture

Abstract

Method for manufacturing a shoe, wherein the method comprises: a. Providing a flexible sock element (350; 450; 521); b. Injection molding at least one sole element (380; 480; 570) onto the flexible sock element (350; 450; 521) such that the at least one sole element (380; 480; 570) has a stiffening element (385; 485; 575) under the arch of the foot, and such that the stiffening element (385; 485; 575) is oriented in the longitudinal direction of the shoe; c. wherein the sock element (350) is provided with a projection (355) and / or a recess and the sole element (380) is injection-molded such that it at least partially encompasses the projection (355) and / or at least partially penetrates the recess to provide a positive-locking connection; d. wherein the method further comprises the step of providing a sole plate element (360) to the flexible sock element (350) to form the projection (355) and / or the recess of the sock element (350).

Description

1. Technical field

[0001] The present invention relates to a sole, in particular a sole for a sports shoe, and a method for its manufacture. Furthermore, the invention relates to a shoe, in particular a sports shoe, and a method for its manufacture and an apparatus for carrying out the methods. 2. State of the art

[0002] Shoes, especially athletic shoes, generally consist of a sole and an upper. The sole protects the foot from injuries, such as those caused by stepping on sharp objects. It also helps improve the wearer's stability. The upper secures the foot within the shoe and to the sole. Furthermore, the upper provides stability, preventing ankle sprains during sudden movements. It also protects the foot from external elements like water and dirt.

[0003] Different requirements are placed on the upper and sole of a shoe. Therefore, a sole is usually made of a different material than a shoe upper and is then attached to the upper. Soles can be sewn, glued, or nailed onto shoe uppers, for example. Even within a single sole or upper, different requirements often need to be met in various areas, meaning that the sole or upper itself is composed of different components. Manufacturing processes for such multi-part shoes require that the individual components of a shoe be cut or stamped out in numerous separate production steps. This not only results in a labor-intensive and complex manufacturing process but also in the production of larger quantities of waste in the form of offcuts.Furthermore, the individual components often have to be assembled by hand, for example by sewing or gluing. This is also labor-intensive and time-consuming. Finally, environmentally harmful solvents are often used in the gluing process.

[0004] EP 2 815 668 A1 discloses a method for manufacturing a shoe in which a sock-shaped base element is attached to a last section. A liquid resin (molten resin) is provided and hardens on the base element.

[0005] There are various known approaches to using injection molding in the manufacture of a shoe.

[0006] DE 34 40 567 A1 reveals a sports shoe with an injected sole and injected studs.

[0007] US patent 4,447,967 discloses a shoe manufactured by injecting a plastic material onto a sock. To ensure a secure bond between the plastic material and the sock, the sock has a thin fabric lining on its underside, which is ribbed with the plastic material.

[0008] Furthermore, the following documents represent the state of the art: US 2013 / 0 133 229 A1, EP 1 468 815 A1, US 4 712 318 A, GB 2 479 220 A and the book “Alles über Schuhe”, author: Max Blattner, 2nd edition (ISBN 3-9522096-6-X).

[0009] However, known methods for injection molding shoe components have disadvantages regarding the stability of the shoe and are also technically difficult to implement. Against this background, the present invention aims to improve the production of shoes or soles by injection molding. 3. Summary of the invention

[0010] The problems of the present invention are solved at least partially by the subject matter of the independent claims.

[0011] In one embodiment, a method for manufacturing a sole, particularly for a sports shoe, comprises providing at least one first sole element. At least one second sole element is injection-molded through the at least one first sole element.

[0012] Thus, a sole can be produced with various sole elements and a permanent connection between them. By injection molding at least part of the sole through another part, a positive-locking connection between the sole elements can be created. The material of the second sole element can remain at least partially within the first sole element after injection molding, providing a complete or at least partial positive lock. This allows, in particular, the absorption of lateral forces. By injection molding through the first sole element, lateral forces between the first and second sole elements can be absorbed in at least three or all four lateral spatial directions. In some examples, an entire sole layer, e.g., an outer sole, can be injection molded through at least the first sole element.The sole element can also extend into the upper part of a shoe.

[0013] The service life of the sole, after which the first and / or second sole element detaches from the sole, can be significantly improved by the described embodiment. This embodiment allows for the use of different materials for the sole elements. Due to the at least partial interlocking, the sole nevertheless exhibits essentially the same service life as soles made from a single material.

[0014] At least one of the sole elements can have a profile element. For example, the first sole element can be designed as a profile element. By injection molding the second sole element through the profile element, a secure connection between the profile element and the second sole element can be achieved, which can withstand the high forces that occur on profile elements of a sole when in contact with the ground. At the same time, customized materials can be used for the profile element and the second sole element, which, for example, forms at least part of an outsole.

[0015] The profile element can have at least one stud. For example, the profile element can be designed as a stud. The high lateral forces to which studs, e.g., of a soccer cleat, are subjected during rapid changes of direction can be reliably absorbed by the at least partial interlocking connection between the profile element and the second sole element. The present method makes it possible to provide soles for studded shoes, e.g., soccer cleats, that are stable even under outdoor conditions with fluctuating temperatures and wet conditions. In other examples, the profile element can be designed as a cleat, stud, etc.

[0016] The first sole element may have an opening. This opening may be designed as a tunnel-like penetration through the first sole element. The penetration may extend from a top surface of the profile element to a bottom surface of the profile element. After the second sole element is injection-molded, this opening may be at least partially filled with the material of the sole element, thus forming a particularly strong bond between the profile element and the sole element.

[0017] The second sole element can consist of one or more of the following plastics: polyamide, polyether block amide, polyvinyl chloride, polyurethane, thermoplastic polyurethane (TPU), and polyvinyl chloride. These materials are well-suited, for example, to provide an outsole with desired properties. Other injection-molded elements described herein can also consist of one or more of these plastics.

[0018] The first sole element can be attached to a flexible sock element. For example, the first sole element can be injection-molded onto the flexible sock element or snapped onto it. Using TPU as a material for sole elements, such as the first and / or the second sole element, has the advantage that it can be transparent. This means that even after injection-molding a thicker layer of TPU as the sole element, the sock element remains visible from the outside. Polyamide as a sole element is also transparent or milky up to a certain layer thickness. By injection-molding the second sole element through the first, a connection between the second sole element and the flexible sock element can be created. Furthermore, the connection between the first sole element and the flexible sock element can be improved. For example,A complete sole is applied to the flexible sock element. The flexible sock element can be designed as a sock covering the foot and extend, for example, to the ankle or even beyond. The described process thus allows for the production of a shoe with a stable, multi-part sole, whereby the sole elements are injection-molded onto the sock element. Attaching a separately manufactured sole to the shoe is unnecessary. Furthermore, the described process can be fully automated: The sock element can, for example, be produced in an automated manufacturing process. At least one initial sole element can be applied to the sock element in a subsequent manufacturing step, before at least one additional sole element is injection-molded.

[0019] The flexible sock element can be made of textile material. For example, the flexible sock element can be knitted. Knitted fabrics allow for cost-effective automated production and can be designed with a variety of material properties. For example, circular, flat, and / or tubular knit fabrics can be used. The flexible sock element can be manufactured as a single piece or composed of several elements, such as a sole and a top section, which can be sewn or glued together.

[0020] The flexible sock element can comprise at least one of the following materials: polyamide, polyester, cotton, leather, or polyurethane. For example, yarns and / or fibers containing polyamide, polyester, polyurethane, and / or cotton can be used. Leather, such as genuine leather and / or synthetic leather, can also be used. The sock element can be made primarily from a single material. Optionally, the sock element can be printed, coated, and / or otherwise functionalized and / or visually enhanced. Alternatively or additionally, the properties of the sock element can be optimized, for example, by combining different materials in various sections.

[0021] The second sole element can form an outsole element. Using the described method, an outsole can be manufactured in one step and permanently connected to other sole components, such as tread elements. The connection can withstand the high loads that occur on an outsole.

[0022] The process can include the further step of injection molding a reinforcing element onto the flexible sock element. In addition to manufacturing at least the first and second sole elements, the flexible sock element can be reinforced as desired in a further manufacturing step using the reinforcing element. For example, the tensile strength and / or flexural stiffness of the flexible sock element can be locally increased by the reinforcing element. A shoe with a stable, multi-part sole can thus be manufactured fully automatically. For example, a reinforcing element can be injection molded into an upper section of the flexible sock element, giving the sock element predetermined properties of a shoe upper. The reinforcing element can include a heel counter and / or be injection molded in such a way that it forms a heel counter.

[0023] Providing the first sole element to the flexible sock element can involve either injection molding or snapping the first sole element onto the reinforcement element. Injection molding the second sole element through the first sole element can create a connection between the second sole element and the reinforcement element. This can also improve the bond between the first sole element and the reinforcement element.

[0024] The second sole element can be injection-molded in such a way that it is positioned, at least partially, between the reinforcement element and the first sole element. This arrangement allows for high mechanical stability of the multi-part sole and the reinforcement element.

[0025] The reinforcement element can be injection-molded in such a way that it extends onto a section of the upper part of the flexible sock element. This allows the upper part of the sock element to be specifically equipped with the desired properties of a shoe upper. A material can be used that is softer, more stretchable, and / or more flexible than is desirable for a sole. The reinforcement element can have at least one opening through which the material of a first and / or second sole element can penetrate. This can contribute to an improved bond between the reinforcement element and the flexible sock element, as a better bond with the flexible sock element is generally achieved with harder materials. The material of the reinforcement element can also be positioned on a section of the sole of the flexible sock element.In other examples, the reinforcing element may only be located on the upper part of the sock element.

[0026] The second sole element can be harder and / or more abrasion-resistant and / or stiffer than the reinforcement element. This allows for greater hardness, abrasion resistance, and / or stiffness in the sole area than in the upper.

[0027] The reinforcement element can have a Shore A hardness of 25-75, particularly 50-70, 35-55, or 40-50. This allows the reinforcement element to, for example, adequately reinforce the upper part of the garment while still ensuring good wearing comfort. Material of this hardness range can also be injection-molded with sufficient stability to, for example, the flexible sock element.

[0028] The first sole element can have a Shore A hardness of 55-95, particularly 60-95 or 85-95. This hardness range is also well suited for profile elements, for example.

[0029] The second sole element can have a Shore A hardness of 60-100, particularly 70-90 or 75-85. This hardness range is well-suited for an outsole and allows for a secure connection with a first sole element and / or a reinforcement element.

[0030] In principle, it is also conceivable that expanded TPU could be applied to the sock element as a sole element, particularly for the production of a running shoe or similar product. Applying a sole element with or made of expanded TPU can be done in a separate step, for example, after injection molding a reinforcement element onto the flexible sock element. Such a sole element could, for instance, form a sole layer. A connection between the sole element with or made of expanded TPU and a reinforcement element and / or other sole elements can be achieved using suitable joining techniques, such as infrared welding, chemical bonding, or others.

[0031] In one embodiment, a sole, in particular a sole for a sports shoe, is provided. The sole has at least one first sole element and at least one second sole element. The at least one second sole element is injection-molded through the at least one first sole element.

[0032] The sole can be manufactured using one of the described methods.

[0033] According to another embodiment, a shoe with a sole as described above is provided.

[0034] In a further embodiment, a method for manufacturing a shoe, in particular a sports shoe, is provided. The method includes providing a flexible sock element. The method also includes injection molding at least one sole element onto the flexible sock element, such that the at least one sole element has a stiffening element under the arch of the foot. The stiffening element can have a specific geometry, for example, be rib-shaped.

[0035] It has been found that the strength of a sole injection-molded onto a flexible sock element can be improved by injecting the sole element in such a way that it incorporates a stiffening element beneath the arch. This placement under the arch provides a sufficiently rigid sole, both in terms of flexion and torsion, to reliably prevent arch collapse and ankle sprains. The stiffening element is particularly important when a sole element is injection-molded from TPU. It is also significant when injection-molding a polyamide sole element, allowing for the application of thin sole elements while still providing a sufficiently stable sole. Thin sole elements can be desirable to enable more transparent sole designs.

[0036] The stiffening element can be oriented lengthwise along the shoe. This design of the stiffening element allows for full support of the arch of the foot. Furthermore, it helps prevent ankle sprains, even during rapid and powerful lateral movements, which are particularly common with sports shoes.

[0037] The stiffening element can extend from below the heel to below the metatarsal bones. Such an elongated stiffening element essentially ensures sufficient stability across the entire rear of the shoe, from the heel to the metatarsal bones. This simultaneously allows for greater flexibility in the toe area. The stiffening element can extend along a central area of ​​the foot, beneath the arch.

[0038] The sole element can be injection-molded in such a way that it extends onto the upper section of the flexible sock element. By at least partially encircling the flexible sock element, an improved connection between the sock and sole elements can be achieved. Furthermore, this allows the upper section of the sock element to be equipped with desired properties. The thickness of the sole element can be less in the upper section of the sock element than in the sole section.

[0039] The sock element is provided with a protrusion and / or a recess. The sole element is injection-molded in such a way that it at least partially encompasses the protrusion and / or at least partially penetrates the recess to create a positive-locking connection. This positive-locking connection is achieved through the at least partially abutting surfaces of the recess and / or protrusion with the sole element. The stiffening element can be provided in this way. Furthermore, the at least partial positive lock allows lateral forces to be absorbed, resulting in a particularly stable connection between the sole element and the sock element. This can significantly increase the service life of the sole.

[0040] The process may include the further step of applying the flexible sock element to a holding element. The holding element may be designed to provide the projection and / or recess of the sock element. For example, the sock element may be pulled over a holding element, such as a strip, before the sole element is injected. The holding element may, for example, have a protrusion that creates a projection on the flexible sock element applied to it. The holding element may also have a recess that creates a recess in the flexible sock element. For example, a portion of the flexible sock element may be held in the recess by a vacuum and / or a mechanical fastener, such as a hook, thus creating a recess in the sock element. In other examples, the sock element is pressed into the recess of the holding element by the injected material of the sole element.In some examples, the retaining device includes a means of ensuring the correct positioning of the sock element.

[0041] The flexible sock element can be provided such that the protrusion and / or depression of the sock element is at least partially pre-formed. For example, the flexible sock element can be folded and / or multi-layered to provide a protrusion and / or depression. A protrusion / depression can also be achieved by a combination of flat knitting and circular knitting. By using a retaining element with a raised section and / or depression, it can be ensured that the protrusion and / or depression in the flexible sock element is correctly positioned during injection molding of the sole element. The raised section and / or depression of the retaining element can also further shape the protrusion and / or depression of the flexible sock element, for example, by stretching the material of the sock element.

[0042] The described method also includes providing a sole plate element on the flexible sock element to form the projection and / or recess of the sock element. The sole plate element can, for example, be inserted into the sock element or attached to its exterior. Alternatively, the sole plate element can be placed on the holding element, and then the sock element can be pulled over the holding element and sole plate element. The sole plate element can have a raised section and / or a recess to provide a corresponding projection and / or recess on the sock element.

[0043] The method can further include providing a sole plate element with a raised section and / or a recess on the sock element, wherein the sole element is injection-molded in such a way that it at least partially encompasses the raised section and / or at least partially penetrates the recess to provide a positive-locking connection. This ensures a secure connection between the sole plate element and the sole element. The stiffening element can also be provided in this way. The sole plate element can, for example, be glued and / or sewn to the sock element. In another embodiment, the sole element can be injection-molded onto the flexible sock element in such a way that it also fixes the sole plate element to the sock element.

[0044] The sole element can be designed as a reinforcement element for the flexible sock element, and the process can further include the step of injection molding an outsole element onto the reinforcement element. The reinforcement element can extend onto the upper section of the sock element. In the upper section, the thickness of the reinforcement element can be reduced compared to the thickness in the sole section. By using a two-stage injection molding process of a reinforcement element and an outsole element, the properties for the upper and sole sections can be tailored independently.

[0045] The sole element can also be designed as an outsole element. Furthermore, a reinforcing element can be injection-molded onto the flexible sock element before the outsole element is applied. The reinforcing element can be designed to have a substantially constant thickness in the sole area. The reinforcing element can have at least one opening, for example, in the sole section around a recess and / or a projection of the sock element.

[0046] The outsole element can be harder and / or more abrasion-resistant and / or stiffer than the reinforcement element. The properties of the outsole and / or the upper part of the shoe can thus be customized.

[0047] The reinforcing element can have a Shore A hardness of 25-65, in particular 35-55 or 40-50.

[0048] The reinforcement element may have at least one perforation. This can help to achieve an improved connection between the reinforcement element, an optional outsole element, and the flexible sock element.

[0049] The outsole element can have a Shore A hardness of 60-100, in particular 70-90 or 75-85.

[0050] According to a further embodiment, a shoe, in particular a sports shoe, is provided which has a flexible sock element. The shoe also has at least one sole element which is injection-molded onto the flexible sock element and has a stiffening element below the arch of the foot.

[0051] The shoe may have been manufactured using one of the methods described above.

[0052] The flexible sock element, the sole element, and the reinforcement element described with reference to claims 21-38 may also have the properties described with reference to claims 1-20 for the flexible sock element, the first or second sole element, and the reinforcement element.

[0053] According to a further embodiment, a device for manufacturing a shoe is provided. The device has a holding element for a flexible sock element, as well as an injection molding unit that can be arranged around the holding element, with an injection mold consisting of at least three parts, i.e., a mold in which the cavity for the injection molding material is formed from three or more parts of the mold during injection molding.

[0054] A three-part design allows for more versatile injection molds, as individual parts of the three-part mold can be interchanged as needed. For example, a flexible sock element with multiple molded components can be produced without requiring a completely new injection mold for each component. The sock element on the holding element can be fixed, for instance, using two parts of the injection molding unit. These two parts can be arranged to be movable relative to each other, allowing the sock element to be clamped onto the holding element within the injection molding unit. The third part of the injection molding unit can then be quickly changed without requiring repositioning and fixing the sock element.For example, the third part can be intended for the sole section of the sock element, so that by simply changing this part, the sole section of the sock element can be fitted with different elements.

[0055] The injection molding device can have a first mold part that encloses the retaining element on a surface intended for a shoe sole, in order to form a first injection mold consisting of at least three parts. For example, a sole element with a predetermined shape can be injected onto the sock element using the first mold part. The at least two remaining parts of the injection mold can, for example, simply ensure that an upper section of the sock element remains free of injected material when the sole element is injected. Alternatively, they can be designed to shape the upper section, so that, for example, the sole element can extend onto the upper section. The first mold part can also ensure that no material is injected in at least a portion of the sole area. The at least two remaining parts can also be designed to shape, for example,It may be formed with a reinforcing element that is not located in the sole section of the sock element. The first molded part may optionally be multi-part.

[0056] The injection molding device can have a second mold part which is designed to enclose the retaining element on the surface intended for the shoe sole, instead of the first mold part, in order to form a second injection mold consisting of at least three parts. This second mold part can then be used, for example, to injection mold another sole element and / or a reinforcement element. The second mold part can ensure that, when injection molding, for example, a reinforcement element, at least part of the sole section of the sock element remains free of injected material. The second mold part can be designed as an alternative or additional component for molding the sole section.

[0057] The injection molding device can have at least two lateral mold parts that are movable relative to each other and that laterally enclose the holding element. The shape of, for example, sole and / or reinforcement elements on the upper section of the sock element can be determined by means of these lateral mold parts. The at least two lateral mold parts can fix the sock element to the holding element, so that the position of the sock element is fixed in all three spatial directions.

[0058] The two side mold parts can be movably arranged relative to the first mold part and / or the second mold part. This allows the side mold parts to be automatically joined with the first and / or second mold part as needed to form a first or second injection mold.

[0059] The device can further include a means for removing the retaining element from the injection molding device. This allows the retaining element, along with the sock element, to be safely removed from the injection molding device without damaging the mold. Contamination of the mold is also thus prevented.

[0060] The retaining element for the flexible sock element can be multi-part. This allows the retaining element to be adapted to sock elements of different shoe sizes, for example. It also makes it easier to position the sock element around the retaining element.

[0061] The described device can be configured to perform one of the described methods. In particular, the device can be designed to perform the described methods fully automatically.

[0062] According to a further embodiment, a method for manufacturing a shoe, in particular a sports shoe, comprises providing a synthetic upper material and providing at least one tread element. The at least one tread element is provided on the synthetic upper material in such a way that a sole element, e.g., an outsole element or an outsole, can be injected between the synthetic upper material and the at least one tread element. The sole element can then be injected in such a way that it adheres simultaneously to the synthetic upper material and to the at least one tread element. Thus, the at least one tread element can be connected to the synthetic upper material via the injection of the sole element without requiring a separate manufacturing step. By directly injecting, for example, an outsole between the upper material and, for example, the outsole, the sole element can be used to create a more stable and secure footing.The studs are firmly bonded to both the outsole and the upper. No further manufacturing step is required. Bonding agents such as adhesives are unnecessary. One advantage of a shoe manufactured using this method is its exceptionally light weight. Furthermore, it allows for automation of the manufacturing process.

[0063] Injection can be carried out, for example, using an injection molding machine. The injected material can be, for example, TPU. The synthetic upper material can be mounted on a holding element. A production line can include several such holding elements. Furthermore, holding devices for profile elements, in particular for lugs, can be provided. One or more profile elements, e.g., lugs or lug clusters, can be inserted into the holding device(s). The profile elements can be prefabricated from TPU, for example, by a suitable injection molding process. They can have projections or recesses that the injection molding material encompasses or into which the injection molding material extends to achieve an additional interlock between the injected material and the at least one profile element. The same principle applies to the upper material.Here too, protrusions and / or recesses may be provided to achieve an additional stabilizing positive fit.

[0064] After inserting the upper material into the holding element and after inserting at least one tread element into the receiving device(s), the holding element with the upper material can be moved towards the tread element(s) until only a small gap remains between the upper material and the tread element(s). The size of the gap can be adapted to the thickness of the sole element to be injected. Subsequently, a sole element, e.g., an outsole, made of TPU for example, is injected between the upper material and the tread element(s).

[0065] In other examples, a different material can be used instead of the synthetic upper, and a flexible sock element can generally be provided and used as explained above with reference to the flexible upper. Furthermore, this embodiment with synthetic upper or flexible sock element can also be combined with aspects described in connection with other embodiments.

[0066] According to a further embodiment, a method for manufacturing a shoe, in particular a sports shoe, comprises providing at least one first element of the shoe. At least one second element of the shoe is injection-molded through the at least one first element. The aspects described herein can also be used generally for manufacturing elements of a shoe that are not necessarily arranged on the sole. 4. Brief description of the characters

[0067] Possible embodiments of the present invention are further described in the following detailed description with reference to the following figures: Fig. 1: Embodiment of a shoe with a sole having profile elements through which a second sole element was injected; Fig. 2: Schematic diagram illustrating the injection of a second sole element through profile elements; Fig. 3: Embodiment of a shoe with a flexible sock element and an injected sole element with a stiffening element under the arch of the foot; Fig. 4A-C: Embodiment of a shoe with a flexible sock element and an injected sole element with a stiffening element under the arch and studs; Fig. 5: Method for manufacturing a shoe with a flexible sock element and a sole with profile elements; Fig. 6A-C: Applying a flexible sock element to a multi-part retaining element; and Fig. 7A-O: Method for manufacturing a shoe with a flexible sock element in a device with a holding element and an injection molding device with an injection mold comprising at least three parts. 5. Detailed description of possible embodiments

[0068] Possible embodiments of the present invention are described in detail below, primarily with reference to soles for sports shoes. However, it is emphasized that the present invention is not limited to these embodiments. Rather, it can also be applied to soles for other types of shoes.

[0069] Furthermore, it should be noted that only individual embodiments of the invention can be described in detail below. It is clear to those skilled in the art that the design possibilities described in relation to these specific embodiments can be further modified and combined in other ways within the scope of the invention, and that individual features can also be omitted if they appear unnecessary. To avoid redundancies, particular reference is therefore made to the explanations in the preceding sections, which also remain valid for the detailed description that follows.

[0070] Fig. Figure 1 shows an example of a shoe with a sole 100. The sole 100 has a plurality of first sole elements in the form of lugs 110. Each lug 110 can have an opening 120. The lugs 110 are optionally arranged on an element 140, which can be manufactured as a single piece with the lugs 110, e.g., injection molded. However, the element 140 can also be manufactured separately and / or from a different material. The element 140 can, for example, be designed as a reinforcement element made of TPU and / or form a midsole element. The element 140 can be made up of multiple parts.

[0071] A second sole element, in the form of an outsole element 130, for example made of polyamide 12, is injection-molded through the openings 120 of the profile elements 110. The outsole element 130 is injection-molded through all openings 120. In other examples, an outsole element 130 and / or other sole elements may only be injection-molded through a portion of the profile elements 110 and / or a portion of the openings 120. In other examples, only some of the lugs 110 may have an opening 120 and / or some lugs 110 may have more than one opening 120.

[0072] The outsole element 130 has several openings in the forefoot area and one in the heel area, through which element 140 is visible. Other openings may be provided in other examples. The outsole element 130 can also be designed as a continuous outsole. The outsole element 130 can have a three-dimensional structure. For example, the outsole element 130 may have a greater thickness below the tread elements 110 than between the tread elements 110, as shown in Fig. 1 can be seen in the heel area.

[0073] As explained, the partial arrangement of the outsole material 130 in the openings 120 of the profile elements 110 results in a particularly stable mechanical connection between the outsole and the profile elements. Additionally, the partially sandwich-like arrangement of the outsole element 130 material between the profile elements 110 and element 140 contributes to the stability of the sole.

[0074] In some examples, the sole 100 can be manufactured separately. In other examples, the sole 100 can be manufactured directly onto a shoe upper or a flexible sock element. It is emphasized that element 140 is merely optional. The tread elements 110 can be provided on the underside of a shoe upper or a flexible sock element. The outsole element 130 can be injection-molded through one or more of the tread elements 130, so that the sole 100 is provided directly on the underside, and no separate attachment of the sole 100 to the underside is necessary. In other examples, instead of the outsole element 130, a different sole element is injection-molded through one or more of the tread elements 110.

[0075] Fig. Figure 2 shows a schematic representation of the injection molding of a second sole element 230 through first sole elements, which are designed as studs 210, to manufacture a shoe 200. A flexible sock element 250 is arranged over a retaining element 260. A reinforcing element 240 is arranged on the flexible sock element 250. This can be, for example, injection molded onto the flexible sock element 250 in a first manufacturing step. The reinforcing element 240 extends along the sole section of the flexible sock element 250 and onto the upper section. The reinforcing element 240 can form a heel counter. In some examples, the reinforcing element 240 can extend completely around the flexible sock element 250. With the help of the reinforcing element 240, for example, a desired stiffening of the upper section can be achieved. The thickness of the reinforcement element 240 can be thinner in the upper area than in the sole area.It can also remain essentially constant there. In the sole area, the reinforcing element can be thickened in areas where initial sole elements, e.g., studs 210, are planned. This allows the initial sole elements to be pre-formed by the reinforcing element 240.

[0076] The first sole elements, e.g., studs 210, are provided on the reinforcement element 240. The studs 210 can, for example, be injection-molded onto the reinforcement element 240 in a further manufacturing step. Alternatively, studs 210 can also be inserted onto the reinforcement element 240. A corresponding notch can be provided in the reinforcement element 240 for this purpose. It is not necessary to securely fasten the studs 210 at this point. It is sufficient, for example, if they are connected to the reinforcement element 240 with a pin 215 or another thin element. The pin 215 can serve as a spacer for the studs 210 relative to the reinforcement element 240. It is also possible to attach the first sole elements, e.g., studs 210, only to the reinforcement element 240 or—if this optional element is missing—to the flexible sock element 250, without creating a connection. For example, the first sole elements, e.g.,Studs 210 are held only at or near the reinforcement element 240 and / or the flexible sock element 250.

[0077] The retaining element 260, the sock element 250 located on it with its reinforcing element 240, and the cleats 210 are fixed within an injection molding device. The injection mold is designed in three parts. It has two side mold parts 271, 272 and an upper mold part 280. Optionally, the injection mold has a lower part 290. The upper mold part 280 is designed such that the material for the second sole element 230 can flow to the openings 220 of the cleats 210 via one or more channels. The channels can be designed so that the material flows in towards the openings 220 to avoid turbulence during the flow. By arranging the material of the second sole element 230 at least partially in the studs 210 and between the studs 210 and the reinforcement element 230 or the sock element 250, a stable connection can be established, as already explained.

[0078] In a central area of ​​the sole, the second sole element 230 can have a stiffening element located below the arch of the foot. This stiffening element can be designed to taper in the area of ​​the heel and the metatarsal bones, transitioning there into a flat area of ​​the second sole element 230. In cross-section according to Fig. Figure 2 shows such a tapered stiffening element. Complete views of possible stiffening elements can be found, for example, in the Fig. 3 and Fig. 4 shown.

[0079] The side molded parts 271, 272 and the upper molded part 280 define the shape of the second sole element 230. The second sole element 230 is designed as an outer sole element. The outer sole element extends in cross-section according to Fig. 2 to the upper part of the sock element 250. This allows for a further improved connection between the outsole element and the reinforcement element 240 or the sock element 250. Furthermore, the area around the sole can be further customized with desired properties. For example, the outsole element can be made of a material with higher hardness, higher abrasion resistance, and / or higher stiffness than the material of the reinforcement element 240. The optional lower part 290 of the injection molding device can define the interface of the outsole element. Alternatively or additionally, this can also be achieved by an edge of the side molded parts 271, 272. In other examples, the second sole element 230 can also be designed as a different element, e.g., a midsole or midsole element.

[0080] Fig. Figure 3 shows an example of a shoe 300 with a flexible sock element 350 designed as a sock. The flexible sock element 350 has an upper section 352 and a sole section 353. These two sections can each be manufactured in one piece. They can be sewn or glued together. In other examples, other and / or additional sections may be provided. The flexible sock element 350 can also be manufactured in one piece, e.g., knitted. The flexible sock element 350 optionally has a hem 351. A projection 355 can be provided on the underside of the sole section 353. The projection 355 can be manufactured, e.g., by circular knitting within a one-piece sole section 353. The projection 355 can also be manufactured separately and connected to the sock element 350, e.g., sewn. The flexible sock can be impregnated by printing, coating, etc., and / or otherwise visually and / or functionally designed.In other examples, the flexible sock element 350 can be designed as an incomplete sock and cover only part of the surface of the foot.

[0081] The Shoe 300 optionally features a 360 sole plate, which can be made of materials such as polyamide or TPU. The sole plate can be manufactured using a suitable injection molding process or a 3D printing process.

[0082] In a first embodiment, the sole plate 360 ​​is designed to be positioned on the underside of the sole section 353. It can be glued and / or sewn in place, for example. The sole plate 360 ​​has a projection 365 designed to accommodate the projection 355 of the flexible sock element 350. In other examples, the sole plate 360 ​​can be designed as a sole plate element that covers only a portion of the underside of the sole section 353, for example, a forefoot area, to better distribute stud pressure across the forefoot if necessary.

[0083] In a second embodiment, the sole plate 360 ​​is detachably attached to a sole section of a holding element described above, e.g., to a strip. Removable adhesives or pins can be used for attachment. To connect it to the sole section 353 of the sock element 350, the sole plate 360 ​​can have a hot-melt coating on its outer surface facing away from the holding element. After the sole plate 360 ​​has been detachably attached to the holding element, the sock element 350 is pulled over the holding element and the sole plate 360. The sole plate 360 ​​is thereby positioned inside the sole section 353 of the sock element 350. When one or more sole elements are subsequently sprayed onto the sock element 350, the sole plate 360 ​​can be permanently bonded to the sock element 350 by means of the hot-melt coating.An insole can be placed on the sole plate 360 ​​inside the sock element 350 if required.

[0084] In a third version of the 360 ​​sole plate, it is interchangeably inserted into the 350 sock element. The 360 ​​sole plate is inserted after sole elements have been injection-molded onto the outside of the sock element. The sole plate may also include an additional layer of cushioning material.

[0085] The shoe 300 can incorporate a reinforcement element 370. The reinforcement element 370 can be injection-molded onto the sock element 350 and, optionally, onto the sole plate 360. With the aid of the reinforcement element 370, the upper section 352 of the flexible sock element can be equipped with desired mechanical properties. For example, increased stiffness and tensile strength can be provided in a lower region of the upper section of the flexible sock. In particular, this area can extend further upwards along the upper section in the heel and instep regions than in the midfoot, as increased strength may be desirable there. The reinforcement element 370 ensures that the shoe 300 provides sufficient stability and prevents the foot from slipping inside the shoe.For example, the reinforcement element 370 can be arranged across the entire span of the flexible sock element 350. In other examples, it is only located in an area of ​​the forefoot adjacent to the sole. By using perforations 371 in the reinforcement element 370, the local material density can be precisely controlled. This allows for varying stiffness and tensile strength. The reinforcement element 370 can also provide increased static friction upon contact with a ball, such as a soccer ball. If the reinforcement element 370 also extends to the sole plate 360, the latter can be fixed to the shoe 300 using the reinforcement element 370 without the need for gluing and / or sewing the sole plate 360. The reinforcement element 370 can also extend to the sole section 353 of the flexible sock element 350, independently of the optional sole plate 360.

[0086] The shoe 300 comprises a sole element 380. The sole element 380 can be configured as an outsole element. The sole element 380 can be injection-molded onto the sole section 353 of the flexible sock 350, an optional sole plate element 360 arranged thereon, and optionally onto the reinforcement element 370. For example, the sole element 380 can overlap the reinforcement element 370 in a region 386 of the sole element or a region 376 of the reinforcement element 370, which is arranged along the edge of the sole section 353. Other overlap regions may be provided in other examples. The sole element 380 comprises a stiffening element 385. The stiffening element 385 can ensure sufficient stability of the sole of the shoe 300. The sole element 380 can be injection-molded in such a way that it at least partially encompasses the projection 355 and / or the optional elevation 365.In this way, the stiffening element 385 can be provided. Furthermore, this also allows for a positive-locking connection between the sole element 380 and the flexible sock element 350 and / or the optional sole plate element 360.

[0087] The sole element 380 may have openings 381. In other examples, the sole element 380 may be continuous and / or completely cover the sole section 353. The sole element 380 optionally has profile elements 382, ​​which may be designed as studs. In other examples, lugs may also be provided. The sole element 380 may overlap with the reinforcement element 370.

[0088] The Fig. Figures 4A-B show another example of a shoe 400 with a flexible sock element 450. Fig. Figure 4A shows a medial view of shoe 400. The flexible sock element 450 can be designed as a sock with a cuff around the ankle area. The sock element 450 can be designed or functionalized in any way.

[0089] An injection-molded reinforcement element 470 can be attached to the sock element 450. The reinforcement element 470 can be arranged at least partially on a sole section of the sock element 450. It can extend completely around a sole section of the sock element 450. Alternatively, the reinforcement element 470 can be arranged only in an area along an edge of the sole section. The reinforcement element 470 can also extend onto an upper section of the sock element 450. The reinforcement element 470 can have a heel area. The reinforcement element 470 can optionally have a plurality of perforations 471 and / or studs 472 and / or grooves 473.

[0090] Furthermore, an injection-molded sole element 480 can be attached to the sock element 450. The sole element 480 can be injection-molded after the reinforcing element 470 and overlap with it. The sole element 480 can be located within the sole section of the sock element 450. The sole element 480 can also extend into the upper section of the sock element and include a heel area. The heel area of ​​the sole element 480 can completely or partially overlap that of the reinforcing element 470. Additionally, the sole element 480 can completely or partially overlap the reinforcing element 470 in a region of the sole section of the sock element 450, for example, in a region along the edge of the sole section. The sole element 480 can have profile elements, such as studs 482 and / or cleats, etc.

[0091] The shoe 400 can also have studs 410. These can be injection-molded onto the shoe. For example, they can be injection-molded onto the sole element 480. Optionally, they can also be injection-molded onto the reinforcement element 470 and / or the sock element 450. The sole element 480 can be injection-molded through the tread elements 410. Alternatively, it is possible to place the studs 410 in a mold and inject the sole element 480 and / or the reinforcement element 470 between the studs 410 and the sock element 450.

[0092] Fig. Figure 4B shows a medial underside view of the 400 shoe. As in Fig. As shown in Figure 4B, the shoe 400, in addition to the perforations 471, studs 472, and grooves 473 of the reinforcement element 470, optionally also features perforations 481, studs 482, and grooves 483 of the sole element 480. Furthermore, the sole element 480 includes a stiffening element 485 located below the arch of the foot. The stiffening element 485 extends from below the rear portion of the heel to below the metatarsal bones. The stiffening element 485 is oriented longitudinally along the shoe 400. The perforations 481 and / or 471 of the sole element 480 and / or the reinforcement element 470 can influence the ventilation properties of the shoe 400. In particular, they can be coordinated to create a waterproof shoe 400. In some examples, the sole element 480 and / or the reinforcement element 470 are designed without openings 481 and 471, respectively.Optionally, at least one sole plate element can also be provided in the shoe 400, which is provided inside the flexible sock element 450 and / or on the outside of the underside of the sole section of the flexible sock element 450.

[0093] Optionally, local injection points 401 are provided in the injection mold used to injection mold the sole element 480 and / or the reinforcement element 470. These can be located at the positions of studs 482 and 472, respectively, as shown in Fig. 4C illustrates this. This allows injection into larger cavities, thus reducing turbulence in the injection stream and enabling more uniform injection and improved injection quality.

[0094] Fig. Figure 5 shows a process for manufacturing a shoe with a flexible sock element and a sole with profile elements, comprising steps 1-11. It is evident to those skilled in the art that the individual steps are merely examples and that individual steps can be omitted and / or carried out in a different order. Step 1 shows printing on a flexible starting material 515 with a printer 510. This allows the starting material 515 to be visually designed and / or functionalized. Alternatively or additionally, the starting material can also be coated, flocked, etc. The starting material can be in web form.

[0095] Step 2 shows the cutting of a section 520 for a flexible sock element 521 from the processed starting material 515. With a web-like starting material 515, a large number of sections 520 can be cut out within a continuous manufacturing process. The cutting can be done, for example, by laser cutting. Alternatively, the sock elements 520 can also be die-cut, for example.

[0096] Step 3 shows the closing of section 520. This closing can be done automatically using a robot arm 530 or semi-automatically. Closing section 520, which can be manufactured flat, provides a flexible sock element 521 that encompasses the foot. The sock element 521, shown in step 4, is applied to a holding element, e.g., pulled over a last.

[0097] In a first injection molding step, as shown in step 5, a reinforcing element 550 is injected onto the sock element 521. The reinforcing element 550 covers the sole section of the sock element 521 and extends to the upper section of the sock element 521. It can be continuous, i.e., without openings. The reinforcing element 550 can completely cover the upper section of the sock element 521, which forms the upper of the finished shoe (see step 8). The reinforcing element 550 can have thickenings 551 on the sole section of the sock element 521. These can be arranged in areas where profile elements are to be attached to the shoe, as already described with reference to Fig. 2 described.

[0098] In step 6, the studs 560 are sprayed onto the thickenings 551. In other examples, other and / or additional profile elements may be provided. In particular, profile elements can also be sprayed on without thickenings 551. In other examples, the profile elements can also be clipped on or simply attached to the reinforcing element 550.

[0099] In step 7, a sole element 570 is injected onto the reinforcement element 550. The sole element 570 can be injected through one or more of the profile elements 560, as for example in connection with Fig. 2 explained. The sole element 570 can have a stiffening element 575 below the arch of the foot. This can be achieved, for example, by injection molding into or around a recess and / or a protrusion on the reinforcement element 551, which can be provided as explained. The sole element 570 can also extend into the upper section of the sock element 521. For example, it can be located in the heel area to further reinforce the shoe there. Optionally, the sole element 570 can extend around the foot around a lower area of ​​the upper section. The sole element 570 can be designed as an outsole element or as a complete outsole. Alternatively, an outsole element or an outsole can be attached to the sole element 570, for example, by pressing or gluing.

[0100] Steps 8 and 9 concern the attachment of a lacing closure to the shoe. In step 8, a section 580 of the upper part of the flexible sock element 521, around which the lacing closure is to be positioned, is separated. This can be done by laser cutting, punching, etc. In step 9, holes 591 for the laces are created in the flexible sock element 521, for example, by punching. Additionally, a tongue 590 can be attached to the sock element 521, for example, by sewing.

[0101] In step 10, an insole 593 is inserted into the shoe. This insole may, for example, have a lining. It may also have a sole section to provide a further improved footbed. Optionally, laces can be inserted into the holes 591.

[0102] In step 11, a right and a left shoe are packed into a sleeve 599.

[0103] Steps 1-11 can be fully automated. They can, for example, be integrated into an on-demand manufacturing process in which a pair of shoes or a single shoe is produced to order and / or individually customized. The manufacturing process can take place automatically in a factory, and the shoes can then be delivered. Alternatively, the manufacturing process can be carried out in a sporting goods and / or shoe store. Due to the automated production, fast and customized manufacturing directly to customer specifications is possible. Using one or more of the steps 1-11 described above, a business model for on-demand ordering / manufacturing can be developed.

[0104] The Fig. Figures 6A-C show the application of a flexible sock element 650 to a multi-part retaining element 660. Fig. Figure 6A shows a two-part retaining element 660, which has a last. The retaining element has a heel section 661 and a toe / instep section 662, which form the last. These two sections can be slid together or apart. Instep sections 662 of different sizes can be provided to adapt the size of the last to the size of the sock element being processed. The instep section 662 and, optionally, the heel section 661 can together have a protrusion 665 on their side intended for the sole section of the sock element. The protrusion 665 can be designed to provide a projection on the sock element 650 or to be arranged in a projection of the sock element 650. Alternatively or additionally, the sock element 650 or the retaining element 660 can have a recess or indentation.The heel section can have a fastening section 663, which may be elongated. The fastening section 663 allows the retaining element to be inserted manually or automatically into an injection molding device.

[0105] The Fig. Figure 6B shows a flexible sock element 650, which can essentially be designed as, for example, in connection with Fig. 3 described. The flexible sock element 650 can, in particular, have a projection 655. Before the flexible sock element 650 is applied to the retaining element, an optionally provided section 651 of the flexible sock element 650 extending beyond the area of ​​the ankle of the foot can be folded.

[0106] Fig. Figure 6C shows the flexible sock element 650 with the folded section 651, as it can be attached to the retaining element 660. The multi-part design of the retaining element 660 can facilitate the attachment of the flexible sock element 650 to the retaining element 660. Optionally, a sole plate element can be attached to the flexible sock element 650 before attachment. Alternatively, or additionally, a sole plate element can be attached to the outside of the flexible sock element 650 before or after attachment. With the aid of one or more sole plate elements and / or the retaining element, a projection and / or a recess can be provided and / or supported on the flexible sock element 650, as already described.

[0107] The Fig. 7A-N disclose a method for manufacturing a shoe with a flexible sock element in a device with a holding element and an injection molding device with an injection mold comprising at least three parts.

[0108] In Fig. 7A is an exemplary sock element 650 attached to the exemplary holding element 660 (see. Fig. 6A-C) is inserted into a first side injection mold 710, which is shown in a sectional view. The side injection mold 710 has several side mold parts. It has a front side mold part 711 and a rear side mold part 716 (in Fig. 7A not shown; see e.g. Fig. 7B). In addition, it shows in Fig. 7A shows the upper and lower lateral molded parts 712 and 713 on the left. It also has a Fig. Figure 7A shows the upper lateral mold part 714 on the right. The lateral injection mold 710 can have another lower lateral mold part, which can be arranged below the mold part 714, in Fig. However, this is not shown in Figure 7A. Other examples may also include more, fewer, or differently arranged side mold parts. The side injection mold 710 optionally has a frame within which the side mold parts are arranged. The side mold parts 711, 712, 714, and 716 are each arranged to be laterally movable relative to one another. Optionally, some of these side mold parts can be combined with other side mold parts, so that a side injection mold can be provided modularly from a plurality of different side mold parts. One or more mold parts can then be used for different side injection molds.

[0109] Fig. Figure 7B shows a top view of the side injection mold 710 with its mold parts 711, 712, 714, 716 and the frame 718.

[0110] Fig. Figure 7C shows a cross-section of the side injection mold 710 with the retaining element 660 and the sock element 650 inserted. The retaining element can, for example, have a protrusion 665 that engages in or provides a projection 655 of the sock element. After the retaining element 660 has been correctly positioned and / or fixed in the side injection mold 710, for example by means of its optional fastening section 663, the side injection mold 710 is closed. For this purpose, the side injection mold has a lateral closing device 717. The lateral closing device 717 can, for example, have one or more bolts and / or one or more pistons and a return element, for example, one or more springs.

[0111] The upper lateral side moldings 712 and 714 are moved towards each other using the lateral locking device 717. For example, both are moved symmetrically to each other. The lower lateral side moldings 713 can be closed together with the upper side moldings 712 and 714 or separately with their own locking device. The front and rear lateral moldings 711 and 716, respectively, can optionally also be closed by their own corresponding locking devices. Fig. 7C shows the locking device 717 in the open position.

[0112] In Fig. 7D shows the locking device 717 in the closed position. As in Fig. In 7D, the retaining element 660 can also be moved (in Fig. 7D downwards), that the sole section of the sock element 650 moves towards a center of the cavity formed by the lateral molded parts 711-716. This movement of the retaining element 660 can occur simultaneously with or after the movement of the lateral molded parts 711-716. For this purpose, a vertical closing means 719 is provided, which, like the lateral closing means 717, has one or more pistons or bolts and a return element. According to the in Fig. In the example shown in Figure 7D, the side injection mold 710 can have a lever mechanism that converts the vertical movement of the locking element 719 into a vertical movement of the fastening section 663. As the two levers 719a move downwards, they press on the slides 719b, causing the slides 719b to be pressed into the notches 664 of the fastening section 663. The slides 719b and the notches 664 are designed such that when the slides 719b are fully pressed into the notches 664, the fastening section 663 moves downwards by a predetermined distance.

[0113] This position is in Fig. Figure 7E shows that fine positioning of the retaining element 660 within the side injection mold 710 is possible. The slides 719b can each have a return element, e.g., a spring 719c.

[0114] Fig. Figure 7F shows the side injection mold 710 within the injection molding device 700. The injection molding device 700 has a movable, e.g., rotatable, frame in which the side injection mold 710 is arranged. Several side injection molds 710 can be arranged in the frame, and these can be separated by walls 705. One or more upper mold parts 720 or 730 can be attached to a support 701 above the frame. The upper mold parts 720 or 730 can be suspended. The side injection mold 710 can be moved under a desired upper mold part 720 or 730. The carrier 701 can be moved downwards along one or more columns 702 towards the side injection mold 710, so that a first injection mold is provided by closing the side injection mold 710 and an upper mold part 720 or 730.

[0115] Fig. Figure 7G shows a bottom view of the first upper mold part 720. The first upper mold part 720 can also be multi-part. For example, it can have a left and right heel part 722 and 723, respectively, and a main part 721. The heel parts 722 and 723 can be laterally movable relative to the main part 721. In other examples, additional and / or different parts of the first upper mold part 720 may be provided. The first upper mold part 720 can be modularly constructed from several parts, as described in connection with the side injection mold 710. Alternatively, the first upper mold part 720 can also be a single piece.

[0116] Fig. Figure 7H shows the side injection mold 710 and the first upper mold part 720, which together form a first injection mold when closed. Material can be injected into the first injection mold and onto the sock element 650 located therein via a side injection head 740 of the injection molding unit 700. The injection head can be located in a corresponding opening in the upper mold part. In other examples, injection into the first injection mold can also occur from above. Multiple injection heads can also be provided simultaneously. Optionally, further elements, such as a sole plate element, can be added – as is the case, for example, with regard to… Fig. 6 described - to be provided on the sock element before injection begins.

[0117] The spraying process is in Fig. Figure 7I is shown schematically. The first injection mold has one or more channels 741 through which the material for an element 670 is injected onto the sock element 650. The material of element 670 can be injected locally at various points. During injection, the material spreads within the cavity formed by the injection mold. This distribution can be optionally supported, for example, by evacuating the cavity. Element 670 can be designed as a reinforcing element, such as the reinforcing element 370. However, element 670 can also be designed as a sole element. The geometry of element 670 is defined by the first injection mold, which is formed by the side injection mold 710 and the first upper mold part 720. In the present example, according to... Fig. 7I The upper molded part essentially serves to seal the sock element 650 in an area encompassing the sole section and part of the heel section of the sock element. The material of element 670 is injected into the cavity defined by the lateral injection mold. In other examples, element 670 may also extend over other areas of the sock element 650, e.g., its entire heel area and / or its sole section and / or around its projection 655. The properties of element 670 are partly determined by the specific material injected.

[0118] Fig. Figure 7K shows a bottom view of a second upper mold part 730. This can be designed in a similar way to the first upper mold part 720 and differ only in the design of the shaping section of the mold part 730.

[0119] In one example, the first upper mold part 720 can be removed from the side injection mold 710 after the element 670 has been injected. The side injection mold 710 can then be moved under the second upper mold part 730. Finally, the second upper mold part 730 can be moved towards the side injection mold 710, so that the second upper mold part 730 and the side injection mold 710 form a second injection mold. Using the second injection mold, another element 680 (see figure) can be injected. Fig. 70) onto the sock element 650. The shape of the injected further element 680 is defined by the second injection mold. The further element 680 can be designed as an outsole element, e.g., like the outsole element 380. The material for the further element 680 can, e.g., be injected from above into the second injection mold using an injection head 750. Alternatively, the material can also be injected laterally, as described in relation to Fig. The injection process is described in section 7H. An injection head 750 for top injection can be provided above both the first and second upper mold elements 720 and 730, respectively. Additionally, an injection head 740 for side injection can be provided for each of these. Alternatively, only one injection head for side injection and / or top injection can be provided on one or more upper mold elements. Optionally, an injection head 740 or 750 can be movable and / or rotatable.

[0120] Fig. 7M shows the injection molding device 700 with a means 760 for removing the retaining element 660 from the injection molding device 700. The means 760 can be configured as a bolt or piston to push the retaining element vertically upwards out of the side of the injection mold 710, as shown in Fig. 7N is shown.

[0121] Fig. Figure 70 shows a view of the sock element 650 with an injection-molded first element 670 and an injection-molded second element 680. Using the described method and / or the described device, for example, a shoe 300 can be produced, as described in reference to Fig. 3 explained, manufactured. Through appropriately designed first and second injection molds and optionally further injection molds, as with regard to the Fig. 1-5 explained sole elements with stiffening element, first and second sole elements, profile elements, reinforcement elements, outsole elements, midsole elements and / or other elements etc. are injected onto flexible sock elements with or without sole plate element.

Claims

[1] Method for manufacturing a shoe, wherein the method comprises: a. Providing a flexible sock element (350; 450; 521); b. Injection molding at least one sole element (380; 480; 570) onto the flexible sock element (350; 450; 521) such that the at least one sole element (380; 480; 570) has a stiffening element (385; 485; 575) under the arch of the foot, and such that the stiffening element (385; 485; 575) is oriented in the longitudinal direction of the shoe; c. wherein the sock element (350) is provided with a projection (355) and / or a recess and the sole element (380) is injection-molded such that it at least partially encompasses the projection (355) and / or at least partially penetrates the recess to provide a positive-locking connection; d. wherein the method further comprises the step of providing a sole plate element (360) to the flexible sock element (350) to form the projection (355) and / or the recess of the sock element (350). [2] Method according to claim 1, wherein the at least one sole element (380; 480; 570) is injected such that the stiffening element (385; 485; 575) extends from below the heel to below the metatarsal bones. [3] Method according to one of claims 1 or 2, wherein the at least one sole element (380; 480; 570) is injected such that it extends to an upper part area (352) of the flexible sock element (350; 450; 521). [4] Method according to any one of claims 1-3, further comprising the step of applying the flexible sock element (350) to a retaining element which is designed to provide the projection (355) and / or the recess of the sock element. [5] Method according to any one of claims 1-4, wherein the flexible sock element (350) is provided such that the projection (355) and / or the recess of the sock element (350) is at least partially preformed. [6] Method according to any one of claims 1-5, wherein the method further comprises the step of providing a sole plate element (360) with a protrusion (365) and / or a recess on the sock element (350) and the at least one sole element (380) being injection-molded such that it at least partially encompasses the protrusion (365) and / or at least partially penetrates the recess to provide a positive connection. [7] Method according to any one of claims 1-6, wherein the at least one sole element is designed as a reinforcement element for the flexible sock element and the method further comprises the step of spraying an outsole element onto the reinforcement element. [8] Method according to one of claims 1-7, wherein the at least one sole element (380; 480; 570) is sprayed on such that the sole element (380; 480; 570) is designed as an outer sole element. [9] Method according to claim 8, further comprising: Injection of a reinforcement element (370; 470; 550) onto the flexible sock element (350; 450; 521) prior to injection of the outsole element (380; 480; 570). [10] Method according to claim 7 or 9, wherein the outsole element (380; 480; 570) is harder and / or more abrasion-resistant and / or stiffer than the reinforcement element (370; 470; 550). [11] Method according to one of claims 7, 9 or 10, wherein the reinforcing element (370; 470; 550) has a Shore A hardness of 25-65. [12] Method according to one of claims 7 or 9-11, wherein the reinforcing element (370; 470) has at least one opening (371; 471). [13] Method according to one of claims 7-12, wherein the outer sole element (380; 480; 570) has a Shore A hardness of 60-100. [14] Shoe, having: a. a flexible sock element (350; 450; 521); b. at least one sole element (380; 480; 570) which is injected onto the flexible sock element (350; 480; 521) and has a stiffening element (385; 485; 575) below the arch of the foot, wherein the stiffening element (385; 485; 575) is oriented in the longitudinal direction of the shoe; c. wherein the sock element (350) is provided with a projection (355) and / or a recess and the sole element (380) is injection-molded such that it at least partially encompasses the projection (355) and / or at least partially penetrates the recess to provide a positive-locking connection; d. a sole plate element (360) on the flexible sock element (350), which forms the projection (355) and / or the recess of the sock element (350). [15] Shoe according to claim 14, manufactured by a method according to any one of claims 1-13.

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