EP4046519B1 - Schuhwerkunterseite mit verbundstruktur und verfahren zur herstellung der besagten unterseite - Google Patents

Schuhwerkunterseite mit verbundstruktur und verfahren zur herstellung der besagten unterseite Download PDF

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Publication number
EP4046519B1
EP4046519B1 EP22154358.0A EP22154358A EP4046519B1 EP 4046519 B1 EP4046519 B1 EP 4046519B1 EP 22154358 A EP22154358 A EP 22154358A EP 4046519 B1 EP4046519 B1 EP 4046519B1
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Prior art keywords
semi
finished product
mold
insert
perimeter
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EP22154358.0A
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English (en)
French (fr)
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EP4046519A1 (de
Inventor
Elvio Silvagni
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Silver 1 Srl
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Silver 1 Srl
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    • A—HUMAN NECESSITIES
    • A43—FOOTWEAR
    • A43B—CHARACTERISTIC FEATURES OF FOOTWEAR; PARTS OF FOOTWEAR
    • A43B13/00—Soles; Sole-and-heel integral units
    • A43B13/14—Soles; Sole-and-heel integral units characterised by the constructive form
    • A43B13/18—Resilient soles
    • A43B13/187—Resiliency achieved by the features of the material, e.g. foam, non liquid materials
    • A—HUMAN NECESSITIES
    • A43—FOOTWEAR
    • A43B—CHARACTERISTIC FEATURES OF FOOTWEAR; PARTS OF FOOTWEAR
    • A43B13/00—Soles; Sole-and-heel integral units
    • A43B13/02—Soles; Sole-and-heel integral units characterised by the material
    • A43B13/04—Plastics, rubber or vulcanised fibre
    • A—HUMAN NECESSITIES
    • A43—FOOTWEAR
    • A43B—CHARACTERISTIC FEATURES OF FOOTWEAR; PARTS OF FOOTWEAR
    • A43B13/00—Soles; Sole-and-heel integral units
    • A43B13/02—Soles; Sole-and-heel integral units characterised by the material
    • A43B13/12—Soles with several layers of different materials
    • A—HUMAN NECESSITIES
    • A43—FOOTWEAR
    • A43B—CHARACTERISTIC FEATURES OF FOOTWEAR; PARTS OF FOOTWEAR
    • A43B13/00—Soles; Sole-and-heel integral units
    • A43B13/14—Soles; Sole-and-heel integral units characterised by the constructive form
    • A43B13/18—Resilient soles
    • A43B13/181—Resiliency achieved by the structure of the sole
    • A43B13/186—Differential cushioning region, e.g. cushioning located under the ball of the foot
    • A—HUMAN NECESSITIES
    • A43—FOOTWEAR
    • A43B—CHARACTERISTIC FEATURES OF FOOTWEAR; PARTS OF FOOTWEAR
    • A43B13/00—Soles; Sole-and-heel integral units
    • A43B13/42—Filling materials located between the insole and outer sole; Stiffening materials
    • A—HUMAN NECESSITIES
    • A43—FOOTWEAR
    • A43B—CHARACTERISTIC FEATURES OF FOOTWEAR; PARTS OF FOOTWEAR
    • A43B9/00—Footwear characterised by the assembling of the individual parts
    • A43B9/10—Footwear with out-turned uppers

Definitions

  • the present patent application for industrial invention relates to a footwear bottom with composite structure and to the manufacturing process of said bottom.
  • footwear bottoms made of synthetic materials that is to say obtained from molding thermoplastic or similar materials, have been widely used.
  • a typical problem of the prior art is related to the fact that the traditional bottoms made of synthetic materials have a degree of compressibility - and consequently a degree of absorption under load - that is substantially homogeneous throughout the entire surface of the foot, despite that it is scientifically demonstrated that the sole of the user's foot could benefit from the provision of areas with a higher or a lower level of compressibility.
  • the purpose of the present invention is to realize a footwear bottom provided with a composite structure - that is to say formed of components made of different materials - which is actually capable of having areas with different compressibility coefficients and, most of all, of offering a particularly comfortable support for the heel of the user's foot.
  • a further purpose of the present invention is to devise a manufacturing process suitable for being preferably used for realizing said footwear bottom with a composite structure.
  • the bottom according to the invention is disclosed by the subject-matter of claim 1; a method for manufacturing a bottom according to the invention is disclosed by the subject-matter of claim 6; a shoe comprising a bottom according to the invention is disclosed by the subject-matter of claim 9.
  • the main peculiarity of the bottom according to the present invention consists in the fact that it adopts a particular cooperation mode between said supporting body and the respective insert made of soft material, according to which the bottom has a differentiated cushioning capacity in correspondence of the various points of the support surface for the foot.
  • the maximum cushioning capacity and consequently the maximum comfort, is provided in correspondence of the area of the user's heel.
  • the bottom according to the invention (F) comprises the following two main components:
  • the other components of said bottom (1) consist of:
  • said supporting body (1) is inferiorly defined by a horizontal bottom wall (10) which is shaped like the sole of the human foot and is circumscribed by a perimeter edge (S) suitable for defining a compartment (V) inside said body (1); it being also provided that said perimeter edge (S) has an upper flat edge (BS).
  • said edge (S) has a minimum height - in the order of a few millimeters - in correspondence of the tip of said body (1), and a higher height towards the rear area of said body (1).
  • the edge (S) comprises two identical rectilinear sides (11a), which are symmetrically opposite and have an ascending direction from the front towards the back and are posteriorly connected - starting from the point of maximum height (11a') - by means of a semicircular wall (11b) with a substantially "U" shape, which has a lower height than the maximum height reached by said two rectilinear sides (11a).
  • said insert (2) comprises:
  • said perimeter edge (23) of the insert (2) comprises a first section (23a) with constant thickness, which extends from the tip of the body (1) until said two points of maximum height (11a') of the rectilinear sides (11a) of the body (1), and a second section with significantly higher thickness (23b), which extends from said two points of maximum height (11a') of the rectilinear sides (11a) of the body (1) until said semicircular wall (11b) of the body (1).
  • the higher thickness adopted by the second section (23b) of said perimeter edge (23) of the insert (2) is a necessary consequence of the difference in height that is recorded, within the body (1), between the two points of maximum height (11a') of said rectilinear sides (11a) and the semicircular wall (11b), even if with the connection of said two inclined teeth (11c).
  • the different performance in terms of cushioning capacity of the various sections of the insert (2) can also be determined by appropriately adjusting the density of said polyether material used for the insert (2).
  • thermoplastic materials which comprises the following steps, as described with reference to Figs. 4 to 9 .
  • the first step - or step A - of said process consists in the provision of a first mold (100) comprising a die (101) and a respective lid (102), suitable for defining the cavity (103) for the molding of a first semi-finished product (SL1), which is subsequently used to obtain the supporting body of the bottom according to the invention (F).
  • the first mold (100) is shown in Figs. 10 and 11 .
  • said first semi-finished product (SL1) adopts a structure that is identical to that one of the body (1), which is shown in detail in Fig. 3 .
  • Fig. 8 which is expressly dedicated to said first semi-finished product (SL1), adopts the same reference numbers used in Fig. 3 for the common components in order to describe said supporting body (1).
  • said first semi-finished product (SL1) adopts a specific additional provision, which is shown in Fig. 8 , obtained by appropriately arranging the cavity of said first mold.
  • a horizontal wing (12) protrudes outwardly from the top of the perimeter edge (S), said horizontal wing (12) comprising:
  • said horizontal wing (12) inferiorly comprises a perimeter rib (N), facing said bottom wall (10) of said first semi-finished product (SL1), as shown in Fig. 9 .
  • the second step - or step B - of the process consists in injecting a jet of PVC mixed with cork inside said first mold.
  • the third step - or step C - of the process consists in the extraction of the first semi-finished product (SL1) of Fig. 8 , which has hardened, from said first mold (100).
  • the fourth step - or step D - of the process consists in loading said first semi-finished product (SL1) into a second mold (not shown in the appended figures), suitably equipped with a cavity capable of exactly containing said first semi-finished product (SL1); it being also provided that the opening of said cavity is circumscribed by a perimeter groove suitable for exactly accommodating said perimeter rib (N) provided in said first semi-finished product (SL1).
  • the positioning of the perimeter rib (N) of the first semi-finished product (SL1) inside the corresponding groove provided on said second mold ensures that said first semi-finished product (SL1) can firmly maintain its position inside said second mold.
  • step E - of the process consists in injecting a jet of polyether inside said second mold - after closing it with the respective lid - to generate the formation of a respective cushioning insert (2), in correspondence of the compartment (V) of the first semi-finished product (SL1), in such a condition that the supporting body (20) of said insert (2) exactly fills said compartment (V) of the first semi-finished product (SL1), whereas the perimeter edge (23) of said anatomical surface (22) of the insert (2) is exactly disposed above said upper flat edge (BS) of the first semi-finished product (SL1).
  • a second semi-finished product (SL2) is obtained, which comprises the first semi-finished product (SL1) and the respective insert (2) made of polyether, which are now irreversibly embedded.
  • the second semi-finished product (SL2) is already provided with the insole (3) which is suitable for coating the anatomical surface (22) of the insert (2), even if such a preferred provision requires the execution of an additional operational step, as illustrated below.
  • the sixth step - or step F - of the process consists in extracting the second semi-finished product (SL2), from said second mold.
  • the seventh step - or step G - of the process consists in finishing the perimeter edges of said second semi-finished product (SL2) in order to remove said perimeter wing (12) provided in the first semi-finished product (SL1) together with the rib (N), as shown in a sequence in Figs. 5 and 6 , obtaining the bottom (F) of the invention, which comprises the supporting body (1), the cushioning insert (2) and the insole (3).
  • An additional step which is conventionally called A2, may be introduced in the process, in order to be performed after the execution of step A and before the execution of step B.
  • said lid (102) of the first mold (100) is coated with a film formed of two layers (13), of which the first lower layer (13a) consists in a thermo-adhesive film and the second upper layer (13b) consists in a film that simply protects the first lower layer (13a).
  • said film (13) is positioned above said cavity (103), in such a condition that the filling of said cavity (103) with the PCV mixed with cork causes said thermo-adhesive layer (13a) of the film (13) to be embedded in said material, coating the surface of the compartment (V) of said first semi-finished product (SL1).
  • the advantage of positioning said first layer (13a) of the film (13) in correspondence of the compartment (V) of the first semi-finished product (SL1) consists in the fact that the provision of the first layer (13a) ultimately allows the insert (2) made of polyether to be better adhered and held inside the body (1) of the bottom according to the invention (F).
  • the aforementioned process preferably envisages an additional intermediate step - or step D2 - to be performed after the execution of step D and before the execution of step E; wherein said additional step allows for disposing said insole (3) in correspondence with the anatomical surface (22) of the insert (2).
  • said step D2 provides for fixing a sample of said insole (3) in correspondence of the internal wall of the lid of said second mold; it being provided that said insole (3) is appropriately provided with holes (3a) suitable for being coupled with respective fixing pins that protrude from said lid of the second mold.
  • Fig. 10 shows the footwear obtained with the bottom according to the invention (1), after assembling a traditional upper (T), namely a strap-like upper, and the sole (4) on said bottom.
  • T traditional upper
  • the preferred choice of realizing the body (1) with PVC mixed with cork is particularly appreciable because it allows for fixing said walking sole (4) under such a body (1) using a simple polyurethane glue, whose advantageous application does not require the previous washing of the body (1) with a halogen.
  • the bottom (F) according to the invention is suitable for being used as an insert that is introduced in an assembled footwear, just like an ordinary insole; it being evident that, in such a way of use, the bottom (F) of the invention will not be provided with the walking sole (4).

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  • Chemical & Material Sciences (AREA)
  • Engineering & Computer Science (AREA)
  • Materials Engineering (AREA)
  • Footwear And Its Accessory, Manufacturing Method And Apparatuses (AREA)

Claims (9)

  1. Schuhboden mit Verbundkonstruktion, umfassend:
    - einen keilförmigen, starren Tragkörper (1), umfassend eine horizontale Wand (10), die von einem Umfangsrand (S) umgeben ist, mit einem oberen flachen Rand (BS), der dazu geeignet ist, eine Kammer (V) im Inneren des Körpers (1) zu begrenzen; wobei der Umfangsrand (S) eine Mindesthöhe in Übereinstimmung mit der Spitze des Körpers (1) und eine zunehmende Höhe in Richtung des Absatzes aufweist, da er zwei geradlinige Seitenwände (11a) mit Aufwärtsrichtung umfasst, die hinten, ab dem Punkt ihrer maximalen Höhe (11a), durch eine im Wesentlichen halbkreisförmige Wand (11b) mit einer geringeren Höhe verbunden sind; wobei die Verbindung zwischen dem Punkt der maximalen Höhe (11a') jeder der halbkreisförmigen Seitenwände (11a) und dem jeweiligen Ende der halbkreisförmigen Wand (11b) durch einen Zahn (11c) gesichert ist, der in Richtung der halbkreisförmigen Wand (11b) geneigt ist;
    - einen Einsatz (2) aus einem elastisch zusammendrückbaren Material, umfassend:
    • einen zentralen Tragkörper (20), der dazu geeignet ist, genau in die Kammer (V) eingepasst zu werden, die von dem Umfangsrand (S) des Körpers (1) umgeben ist;
    • eine obere horizontale Wand (22) mit anatomischem Profil, die dazu geeignet ist, an der Oberseite des Körpers (1) so angeordnet zu werden, dass sie während des Gebrauchs als Auflagefläche für den Fuß des Benutzers dient; wobei die obere Wand (22) eine größere Breite als der zentrale Körper (20) aufweist, so dass deren Umfangsrand (23) den oberen flachen Rand (BS), der auf der Oberseite des Umfangsrandes (S) des Körpers (1) vorgesehen ist, stufenartig überlappt; und wobei der Umfangsrand (23) des Einsatzes (2) einen ersten Abschnitt (23a) mit einer gleichbleibenden Dicke umfasst, der sich im Wesentlichen von der Spitze des Körpers (1) zu den beiden Punkten maximaler Höhe (11a') der geradlinigen Seitenwände (11a) des Körpers (1) erstreckt, und einen zweiten Abschnitt (23b), der sich von den Punkten maximaler Höhe (11a') der Seitenwände (11a) des Körpers (1) bis zur halbkreisförmigen Wand (11c) des Körpers (1) erstreckt;
    wobei
    der Körper (1) aus PVC gemischt mit Kork hergestellt ist.
  2. Schuhboden nach Anspruch 1, wobei die obere Wand (22) des Einsatzes (2) mit einer Innensohle (3) aus Leder oder gleichwertigen Materialien bedeckt ist.
  3. Schuhboden nach einem der vorstehenden Ansprüche, umfassend eine Laufsohle (4) aus mikroporösem Material und/oder Gummi, die unterseitig an der horizontalen Wand (10) des Körpers (1) angebracht ist.
  4. Schuhboden nach einem der vorstehenden Ansprüche, wobei der Einsatz (2) aus Polyether hergestellt ist.
  5. Schuhboden nach Anspruch 1, wobei eine heißklebende Schicht (13a) in einer Zwischenposition zwischen dem Körper (1) und dem Einsatz (2) vorgesehen ist.
  6. Verfahren zur Herstellung des Schuhbodens nach einem der vorstehenden Ansprüche, wobei das Verfahren die folgenden Verfahrensschritte umfasst:
    a) Bereitstellen einer ersten Form (100), umfassend eine Matrize (101) und einen entsprechenden Deckel (102), die geeignet sind, einen Hohlraum (103) zum Formpressen eines ersten Halbfertigprodukts (SL1) zu definieren, das strukturell identisch mit dem Körper (1) ist; wobei ferner vorgesehen ist, dass aus dem oberen flachen Rand (BS) des Umfangsrandes (S) des ersten Halbfertigprodukts (SL1) ein horizontaler Flügel (12) nach außen vorsteht, umfassend:
    • einen ersten Abschnitt (12a), der die vordere Hälfte des Körpers (1) umrundet
    • zwei zweite Abschnitte (12b), die in Übereinstimmung mit den beiden geradlinigen Seiten (11a) mit Aufwärtsrichtung vorgesehen sind
    • zwei dritte Abschnitte (12c), die in Übereinstimmung mit den beiden nach geneigten Zähnen (11c) vorgesehen sind
    • einen vierten Abschnitt (12d), der in Übereinstimmung der halbkreisförmigen Wand (11b) vorgesehen ist;
    wobei der horizontale Flügel (12) unterseitig eine Umfangsrippe (N) umfasst;
    B) Einspritzen eines Strahls von PVC gemischt mit Kork in die erste Form;
    C) Entnehmen des ersten ausgehärteten Halbfertigprodukts (SL1) aus der ersten Form;
    D) Einlegen des ersten Halbfertigprodukts (SL1) in eine zweite Form, wobei die zweite Form einen Hohlraum annimmt, der in der Lage ist, das erste Halbfertigprodukt (SL1) exakt aufzunehmen; wobei die Öffnung des Hohlraums von einer umlaufenden Nut umgeben ist, die geeignet ist, die Umfangsrippe (N), die auf dem Flügel (12) des ersten Halbfertigprodukts (SL1) vorgesehen ist, exakt aufzunehmen;
    E) Einspritzen eines Strahls von Polyether ins Innere der zweiten Form, um das erste Halbfertigprodukt (SL1) zu befüllen und die im Wesentlichen anatomische obere Wand (22) des Einsatzes (2) auf der Oberseite der ersten Halbfertigprodukts (SL1) zu formen, so dass der Umfangsrand (23) der oberen Wand (22) über dem oberen flachen Rand (BS) des Umfangsrandes (S) des ersten Halbfertigprodukts (SL1) angeordnet ist;
    F) Entnehmen eines zweiten Halbfertigprodukts (SL2) aus der zweiten Form, die sowohl das erste Halbfertigprodukt (SL1) als auch den Einsatz (S) aus Polyether umfasst, die - wie oben erläutert - nun irreversibel eingebettet sind;
    G) Endbearbeitung der Umfangsränder des zweiten Halbfertigprodukts (SL2), um den im ersten Halbfertigprodukt (SL1) vorgesehenen umlaufenden Flügel (12) zusammen mit der Rippe (N) zu entfernen.
  7. Verfahren nach Anspruch 6, wobei ein zusätzlicher Schritt A1) nach Ausführen des Schrittes A) ausgeführt wird, wobei der zusätzliche Schritt A1) aus dem Auflegen einer Folie (13) besteht, die aus einer ersten heißklebenden Schicht (13a) und einer zweiten Deckschicht (13b) im Inneren des Hohlraums (103) der ersten Form (100) gebildet wird, wobei nach Ausführen des nachfolgenden Schrittes B die erste Schicht (13a) geeignet ist, die Kammer (V) des ersten Halbfertigprodukts (SL1) exakt und irreversibel zu beschichten, während die zweite Schicht (13b), die die erste Schicht (13a) schützt, geeignet ist, vor dem Ausführen des Schrittes D) entfernt zu werden.
  8. Verfahren nach Anspruch 6, wobei nach Ausführen des Schrittes D) das Ausführen eines zusätzlichen Schrittes D2) vorgesehen ist, wobei der Schritt D2) aus dem reversiblen Befestigen einer Innensohle (3) aus Leder o. ä. in Übereinstimmung mit der Innenfläche des Deckels der zweiten Form besteht, so dass während des nachfolgenden Schrittes E) die Innensohle (3) in den Strahl von Polyether eingebettet ist und die obere Wand (22) des Einsatzes (2) beschichtet.
  9. Schuh umfassend einen Schuhboden (1), einen Schaft (T) und eine Laufsohle (4), wobei der Schuhboden (1) nach einem oder mehreren der vorstehenden Ansprüche hergestellt ist.
EP22154358.0A 2021-02-17 2022-01-31 Schuhwerkunterseite mit verbundstruktur und verfahren zur herstellung der besagten unterseite Active EP4046519B1 (de)

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Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP3868238A1 (de) * 2020-02-18 2021-08-25 Proinvex Urban S.L. Schuheinlegesohle, verfahren zur herstellung und form zur herstellung davon

Family Cites Families (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US6226894B1 (en) * 1998-05-11 2001-05-08 R. G. Barry Corporation Slipper and method for manufacturing slipper
IT1311590B1 (it) * 1999-11-23 2002-03-13 Testoni A Spa Metodo per la realizzazione di una calzatura e calzatura da essoottenibile.
ITBO20060288A1 (it) * 2006-04-14 2007-10-15 Ideaslab Snc Calzatura e relativo procedimento di realizzazione.
CN201278864Y (zh) * 2008-09-27 2009-07-29 广州美商波派皮具有限公司 一种带减震鞋垫的鞋底
US8595956B2 (en) * 2011-09-29 2013-12-03 C. & J. Clark International Limited Footwear with elastic footbed cover and soft foam footbed

Patent Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP3868238A1 (de) * 2020-02-18 2021-08-25 Proinvex Urban S.L. Schuheinlegesohle, verfahren zur herstellung und form zur herstellung davon
WO2021165559A1 (es) * 2020-02-18 2021-08-26 Proinvex Urban S.L Entresuela de calzado, procedimiento de fabricación y molde para su fabricacion

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