EP4046519A1 - 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
EP4046519A1
EP4046519A1 EP22154358.0A EP22154358A EP4046519A1 EP 4046519 A1 EP4046519 A1 EP 4046519A1 EP 22154358 A EP22154358 A EP 22154358A EP 4046519 A1 EP4046519 A1 EP 4046519A1
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EP
European Patent Office
Prior art keywords
semi
finished product
mold
insert
perimeter
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Granted
Application number
EP22154358.0A
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English (en)
French (fr)
Other versions
EP4046519B1 (de
Inventor
Elvio Silvagni
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Silver 1 Srl
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Silver 1 Srl
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Publication of EP4046519A1 publication Critical patent/EP4046519A1/de
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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 formed of:
  • 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).
  • step B could be alternatively performed by providing that the body (1) is obtained from vulcanizing a rough piece of rubber mixed with cork, using a system and a respective first mold that are suitable for such a vulcanization process.
  • 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)
EP22154358.0A 2021-02-17 2022-01-31 Schuhwerkunterseite mit verbundstruktur und verfahren zur herstellung der besagten unterseite Active EP4046519B1 (de)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
IT202100003632 2021-02-17

Publications (2)

Publication Number Publication Date
EP4046519A1 true EP4046519A1 (de) 2022-08-24
EP4046519B1 EP4046519B1 (de) 2023-09-06

Family

ID=75769799

Family Applications (1)

Application Number Title Priority Date Filing Date
EP22154358.0A Active EP4046519B1 (de) 2021-02-17 2022-01-31 Schuhwerkunterseite mit verbundstruktur und verfahren zur herstellung der besagten unterseite

Country Status (1)

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EP (1) EP4046519B1 (de)

Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE29908019U1 (de) * 1998-05-11 2000-03-09 R. G. Barry Corp., Pickerington, Ohio Schlappen
EP1103197A2 (de) * 1999-11-23 2001-05-30 A. Testoni S.P.A. Verfahren zur Herstellung von Schuhen und durch dieses Verfahren hergestellte Schuhe
EP1844672A1 (de) * 2006-04-14 2007-10-17 Ideaslab SNC Schuh und Herstellungsverfahren dafür
US20110232128A1 (en) * 2008-09-27 2011-09-29 Propet Robert Shoe Soles With Damping Foot Pads
EP2574251A2 (de) * 2011-09-29 2013-04-03 C & J Clark International Limited Fussbett mit elastischer Fussbettumhüllung und Weichschaumfussbett

Family Cites Families (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
ES2951948T3 (es) * 2020-02-18 2023-10-25 Proinvex Urban S L Planta de calzado y procedimiento de fabricación

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE29908019U1 (de) * 1998-05-11 2000-03-09 R. G. Barry Corp., Pickerington, Ohio Schlappen
EP1103197A2 (de) * 1999-11-23 2001-05-30 A. Testoni S.P.A. Verfahren zur Herstellung von Schuhen und durch dieses Verfahren hergestellte Schuhe
EP1844672A1 (de) * 2006-04-14 2007-10-17 Ideaslab SNC Schuh und Herstellungsverfahren dafür
US20110232128A1 (en) * 2008-09-27 2011-09-29 Propet Robert Shoe Soles With Damping Foot Pads
EP2574251A2 (de) * 2011-09-29 2013-04-03 C & J Clark International Limited Fussbett mit elastischer Fussbettumhüllung und Weichschaumfussbett

Also Published As

Publication number Publication date
EP4046519B1 (de) 2023-09-06

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