WO2023156492A1 - Orthopedic sole printed in three dimensions by additive manufacturing, having an adhesive closing surface, and method for producing same - Google Patents

Orthopedic sole printed in three dimensions by additive manufacturing, having an adhesive closing surface, and method for producing same Download PDF

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Publication number
WO2023156492A1
WO2023156492A1 PCT/EP2023/053818 EP2023053818W WO2023156492A1 WO 2023156492 A1 WO2023156492 A1 WO 2023156492A1 EP 2023053818 W EP2023053818 W EP 2023053818W WO 2023156492 A1 WO2023156492 A1 WO 2023156492A1
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WO
WIPO (PCT)
Prior art keywords
hooks
orthopedic
sole
printing
plane
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Application number
PCT/EP2023/053818
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French (fr)
Inventor
Nicolas SAINT-LO
Julien CHILOU
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Nysl
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Publication date
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Publication of WO2023156492A1 publication Critical patent/WO2023156492A1/en

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    • A—HUMAN NECESSITIES
    • A43—FOOTWEAR
    • A43B—CHARACTERISTIC FEATURES OF FOOTWEAR; PARTS OF FOOTWEAR
    • A43B1/00—Footwear characterised by the material
    • A43B1/0081—Footwear characterised by the material made at least partially of hook-and-loop type material 
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B33—ADDITIVE MANUFACTURING TECHNOLOGY
    • B33Y—ADDITIVE MANUFACTURING, i.e. MANUFACTURING OF THREE-DIMENSIONAL [3-D] OBJECTS BY ADDITIVE DEPOSITION, ADDITIVE AGGLOMERATION OR ADDITIVE LAYERING, e.g. BY 3-D PRINTING, STEREOLITHOGRAPHY OR SELECTIVE LASER SINTERING
    • B33Y10/00—Processes of additive manufacturing
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B33—ADDITIVE MANUFACTURING TECHNOLOGY
    • B33Y—ADDITIVE MANUFACTURING, i.e. MANUFACTURING OF THREE-DIMENSIONAL [3-D] OBJECTS BY ADDITIVE DEPOSITION, ADDITIVE AGGLOMERATION OR ADDITIVE LAYERING, e.g. BY 3-D PRINTING, STEREOLITHOGRAPHY OR SELECTIVE LASER SINTERING
    • B33Y80/00—Products made by additive manufacturing

Definitions

  • the present invention relates to an orthopedic insole printed by three-dimensional additive printing, comprising a self-gripping surface, and a method for manufacturing it.
  • the present invention applies, in particular, to the field of the custom manufacturing of orthopedic insoles by three-dimensional additive printing.
  • the pedorthesis can take different forms, depending on the pathology of the foot to be treated, orthopedic insole, orthopedic shoe, foot splint, onychoplasty, etc. There are different types of orthopedic insoles, also called plantar orthotics.
  • the orthopedic insoles are made to measure after examinations. They are therefore totally personal.
  • the pedicure-podiatrist performs them according to a clinical examination, the footprint and a posturology examination.
  • insoles are preferentially used to reduce the pain created by uneven support. They are inserted in the shoes of daily use because they take up little space. Correction insoles are made according to the imprint of the foot. They make it possible to correct the support and to reduce the shocks. But they are often quite thick. Practical in sports shoes, they are less suitable for town shoes.
  • the practice is to glue the comfort insole to the orthopedic insole.
  • the comfort insole cannot be detached from the orthopedic insole, to wash it. And the washing conditions can damage the orthopedic insole, either because of the chemical agents used, or because of the temperature used.
  • sticking causes emissions of volatile organic compounds that are dangerous for the operator and then potentially dangerous for the user of the sole.
  • Document WO2014100462 is known, which describes a shoe produced by additive printing. Instead of a lace, it is envisaged the simultaneous printing of the two surfaces of a self-gripping fabric to form a means of closure, as known in shoes provided with Velcro to close the shoe on the foot.
  • the document CA3033732 is also known, which describes an orthopedic insole without scratch printed by additive printing.
  • the present invention aims to remedy all or part of these drawbacks.
  • the present invention relates, according to a first aspect, to an orthopedic insole printed by additive printing, comprising a surface of a hook-and-loop fastening system, the hooks, mushrooms or loops of which are printed by additive printing simultaneously to the rest of the sole.
  • Hook-and-loop fasteners known by the trademark “Velcro” are also called “scratch” in colloquial parlance (onomatopoeia of the noise made by the separation of the fastener).
  • this system is composed of two surfaces covered with different textures making it possible, when brought into contact, to obtain a removable connection.
  • One of the names in English of these closure systems is “hook and loop” (for “hook and loop”), although these closure systems can take other forms, in particular “hook and velvet”, “mushroom and loop” and “mushroom and velvet”.
  • One of the hook-and-loop surfaces is rough and has hooks and/or fungus.
  • the other of the hook-and-loop surfaces is soft and has loops or is made of velour.
  • orthopedic insoles printed in 3D natively comprise a hook-and-loop surface that is integral with the rest of the sole.
  • the manufacture of these orthopedic insoles which can be bonded by simple contact with a self-gripping surface of the opposite type, is thus simplified and the orthopedic insole is more resistant.
  • the present invention applies particularly to orthopedic insoles of complex non-developable shapes for which the subsequent fitting of a self-gripping surface would be particularly difficult.
  • the present invention also applies particularly to thin orthopedic insoles, for which the gluing or sewing of an additional hook-and-loop surface would increase the thickness beyond the technical specifications of this orthopedic insole.
  • a comfort or insole provided with a self-gripping surface for example loops or velvet, can be fixed to the orthopedic insole by simple support and detached by application of manual force, without tools, for example for washing.
  • the orthopedic insole has hooks and/or mushrooms of a hook-and-loop surface printed by additive printing.
  • the orthopedic sole can be attached to any surface comprising loops or velvet, for example a comfort or cleanliness sole.
  • the orthopedic sole comprises hooks extending in a plane and/or having a plane of symmetry, these planes of the hooks making, with a predetermined direction, an angle less than 45 degrees.
  • the printing of the hooks is facilitated in particular when the predetermined direction is the direction of printing, orthogonal to the plane of successive addition of material.
  • the resistance of these hooks to shear forces applied to the fastener is anisotropic, which makes it possible to match the direction of maximum resistance, that is to say the plane of the hooks, to the direction in which apply the greatest shear forces.
  • These hooks having an angle of less than 45 degrees, and preferably less than 30 degrees, with the predetermined direction can be supplemented, on the sole, by hooks not having an angle of less than 45 degrees with the predetermined direction.
  • the shape of the hooks is an open planar loop of circular radial section, the height of each hook measured perpendicularly from its anchorage to a surface of the functional part of the sole being between 0.75 and 2 mm and the diameter of the circular sections being between 0.2 and 0.75 mm.
  • the inventors have determined that these geometric characteristics offer a good compromise of comfort and resistance to shear stresses of the binding.
  • the hooks are staggered over the surface of the functional part of the sole and separated by a constant distance of between 1 mm and 3 mm.
  • the inventors have determined that these geometric characteristics offer a good compromise of comfort and resistance to shear stresses of the binding.
  • the present invention relates to a process for printing an orthopedic insole by additive printing, which comprises additive printing:
  • hooks are printed, each hook extending in a plane, the planes of the hooks forming an angle less than 45 degrees with the direction of printing, orthogonal to the plane of successive addition or solidification of matter.
  • thermoplastic material during the printing, a powder of thermoplastic material is used, the printing comprising at least heating this powder.
  • a supply of liquid agent is carried out.
  • a thermoplastic polymer of the polyamide type is used.
  • Figure 1 shows, in perspective, a section of a particular embodiment of an orthopedic insole printed with a self-gripping surface, linked to an object supporting parts of buckles, fixed together by these surfaces,
  • FIG. 1 shows, in section, the orthopedic sole and the object supporting parts of loops illustrated in Figure 1, detached,
  • Figure 3 shows, in schematic perspective, a self-gripping surface being manufactured in an additive printing 3D printer
  • FIG. 4 represents, in section, an orthopedic insole which is the subject of the invention and a comfort insole, separated,
  • FIG. 5 shows, in section, the soles illustrated in Figure 5, gripped together
  • FIG. 6 represents, in perspective, a first embodiment of an orthopedic insole which is the subject of the invention
  • FIG. 7 represents, in perspective, the orthopedic sole illustrated in FIG. 6 and a comfort sole, separated
  • FIG 8 shows, in perspective, the soles illustrated in Figure 7, gripped together
  • FIG. 9 represents, in perspective, a second embodiment of an orthopedic insole which is the subject of the invention.
  • FIG. 10 represents, in perspective, a third embodiment of an orthopedic insole which is the subject of the invention.
  • FIG. 11 represents, in perspective, a fourth embodiment of an orthopedic insole which is the subject of the invention.
  • FIG. 12 represents, in perspective, a fifth embodiment of an orthopedic insole which is the subject of the invention.
  • FIG. 14 represents examples of hooks, mushrooms and loops printed according to the method which is the subject of the invention.
  • FIG. 15 represents, in the form of a flowchart, the steps of a particular embodiment of the method of manufacturing an orthopedic insole which is the subject of the present invention.
  • top is what is at the top during use, respectively, of the sole inserted in a shoe, on the one hand, and of the printer, on the other hand.
  • a "side view” of a sole is a view of the sole along its length, perpendicular to a top view.
  • the self-gripping fastening zone 24 comprises the hooks 25 and the loops 26, either linked together (FIG. 1), or separated (FIG. 2).
  • the object 22 has an upper surface 23.
  • the object 22 can, like the orthopedic sole 21, be printed in 3D additive printing with the loops 26 which line its lower surface.
  • the object 22 a comfort or cleanliness sole
  • the assembly of these elements being intended to be introduced into a shoe of a person who needs an orthopedic correction.
  • the present invention is not limited to this type of element.
  • the orthopedic sole 21 can also, within the scope of the invention, carry mushrooms and/or loops of a hook-and-loop fastener.
  • FIG. 3 a 3D additive printer 30 in the process of printing an orthopedic sole 21.
  • the geometric reference frame 32 comprises three orthogonal directions, the X axis of the x and the Y axis of the y being in a plane horizontal and the Z axis of the z being vertical.
  • the Z axis, vertical is the printing direction.
  • the plane defined by the X and Y axes is parallel to the successive planes according to which the material is successively solidified during additive printing, it is the plane successively traversed by the head or the printing plate.
  • the orthopedic sole 21 is printed in a configuration such that the main planes of the hooks being printed or their planes of symmetry form an angle less than 45 with the vertical axis and, preferentially, are vertical.
  • This arrangement allows a more efficient and more durable manufacture of the hooks and an increased resistance to shear forces parallel to the axis of these planes.
  • the 3D printer 30 allows the implementation of a particular embodiment of the method that is the subject of the invention, which consists in covering the upper surface of the orthopedic insole with a set of hooks whose shape, dimensions and density have been specially specified for:
  • Benefits include:
  • the product thus obtained can be replaced or modified more easily, the covers being able to be removed and put back in place without leaving a trace.
  • the user can himself and simply change the covering, i.e. the comfort sole, and adapt the product to his use and his shoes,
  • the durability of the sole is prolonged by facilitating the change of the covering which is the part of greatest wear. It is observed, in FIGS. 4 and 5, that the present invention applies particularly well to non-developable surfaces 41 and 46, for example portions of spheres, ellipsoids, paraboloids or hyperboloids. Indeed, the present invention allows a uniform distribution of hooks, mushrooms or loops 45 on these surfaces, which would not allow a hook-and-loop fabric surface attached to this orthopedic sole.
  • the assembly 40 thus comprises an orthopedic sole 41 printed by 3D additive printing with hooks 45 on the upper face, and an object 42 carrying loops 46 on the lower face and a support surface 43 on the upper face. As can be seen in FIG. 5, the fixing of the orthopedic sole 41 and of the object 42 by the self-gripping elements 45 and 46 is uniform and of constant thickness.
  • Figures 6 to 13 give representations of different models of orthopedic insoles 51 to 91. Depending on the feet, the poitures, the elements and the treatments to be applied, their shapes may vary. However, preferably, the upper surface always remains entirely covered by the hooks 55 to 95.
  • FIGS. 6 to 8 represent a standard orthopedic insole 51 (“PCL” model), without any podiatry element applied and whose shape follows the morphology of the patient's foot.
  • the upper surface of this sole 51 has hooks 55 on its upper face.
  • a covering 52 comprising a lower surface 56 in velvet or lined with loops is fixed to this sole 51 by simple pressing to form an assembly 50, as illustrated in FIG. 8. This covering 52 can be removed at will from the sole 51 by pulling on its surface starting from an edge of the sole 51 .
  • FIG. 9 represents the same model (“PCL”) of insole with two therapeutic elements which alter its shape.
  • PCL model
  • a recess 67 of the heel is made behind the orthopedic sole 61.
  • FIG. 10 represents the same model of orthopedic sole 71 comprising hooks 75 on its upper face, with sub-capital 79 elements for the big toe and sub-capital 78 for the last toe and a heel piece 77.
  • FIG. 11 still shows the same model of orthopedic sole 81 comprising hooks 85 on the upper face, in the “entire sole” version which makes it possible to produce soles which treat the entire foot, toes included.
  • Figures 12 and 13 represent an "SPC" model of orthopedic sole 91 comprising hooks 95, dedicated in particular to sports practices.
  • This sole 91 has slots 97, which can vary in depth and number to apply various treatments.
  • FIG. 14 shows five shapes, 100, 102, 104, 106 and 108 on the sole orthopedic 21. Their location on the upper surface of the orthopedic sole 21 varies in complexity, thickness, height and density of distribution on the surface.
  • Figure 14 The different shapes are shown on different rows in Figure 14. On each row, from left to right, the leftmost figure is a side view, the next figure is a top view, i.e. say perpendicular to the surface of the orthopedic insole, the following figure is a front view and the rightmost figure is a perspective view.
  • Form 100 is a simple tubular hook, of circular radial section of constant diameter. This shape 100 as a question mark is symmetrical with respect to a plane 101 , which forms the general plane of this shape 100.
  • Shape 102 is a double hook with general plane 103, plane of symmetry forming the greatest intersection with shape 102.
  • Last 104 is a double hook similar to last 102, but whose hooks are slightly curved outside the general plane 105.
  • Form 106 is a double hook, the hooks of which form an angle between them, preferably less than 90 degrees and, here, approximately 60 degrees.
  • Shape 108 is a triple hook with rotational symmetry.
  • each hook extends in a plane (hooks 100, 102, 104), called main, and/or has a plane of symmetry (hooks 100, 102, 106, 108), these planes of the hooks making, with a predetermined direction 110, an angle less than 45 degrees and, preferably, less than 30 degrees.
  • the printing of the hooks is thus facilitated in particular when the predetermined direction is the printing direction (Z in FIG. 3), orthogonal to the plane (X, Y, in FIG. 3) of successive addition or solidification of material.
  • the resistance of these hooks to shear forces applied to the fastener is anisotropic, which makes it possible to match the direction of maximum resistance, that is to say the plane of the hooks, to the direction in which apply the greatest shear forces to the orthopedic insole.
  • These hooks having an angle less than 45 degrees with the predetermined direction can be supplemented, on the sole, by hooks not having an angle less than 45 degrees with the predetermined direction, for example, the part represented to the right of the double hook 106 or the two parts represented at the bottom of the triple hook 108.
  • all the hooks form an angle less than 45 degrees and, preferably, less than 30 degrees with the predetermined direction.
  • this predetermined direction is the printing direction.
  • an optimal shape 100 of the hook is a flat loop open downwards, on the side of the upper face of the sole.
  • This open planar loop 100 preferably has a circular radial section.
  • the height of each hook measured perpendicularly from its anchoring to a surface of the functional part of the sole is preferably between 0.75 and 2 mm.
  • the diameter of the circular sections is preferably between 0.2 and 0.75 mm.
  • the height of the plane loop is 1.25 mm and its section has a diameter of 0.5 mm.
  • the hooks are preferably staggered and separated by a constant distance, preferably between 1 mm and 3 mm, for example 1.408 mm, in which case, a density of 52 hooks per square centimeter is obtained.
  • the hooks cover the entire upper surface of the sole, the contours of which they follow at a distance of at least 1.5 mm, i.e. there are no hooks on the periphery of the sole. the sole, up to 1.5 mm from the edge.
  • the application zone of the hooks 25 varies in shape and in area.
  • the number of hooks 25 is automatically adapted by software to the area of application and to the targeted surface density.
  • the placement reference points of the hooks 25 follow the variation in thickness so that the hooks 25 always have the same height with respect to the surface. upper of the functional part of the orthopedic sole 21.
  • the hooks 25 are preferably oriented relative to their position during manufacture rather than relative to their position vis-à-vis the surface of the the sole 21.
  • the hooks 25 are arranged such that their main planes (for example, the planes 101, 103 and 105) are found in parallel vertical planes during the printing process.
  • the file representing the sole 21 to be printed is transmitted to the printer taking into account this preferential orientation.
  • FIG. 15 represents steps of a method 120 for manufacturing an orthopedic sole according to the invention.
  • a step 121 measurements are taken on the patient's foot.
  • the modeling of the orthopedic insole adapted to the patient is carried out.
  • the model of the sole to be printed is oriented so that the general planes of the hooks to be printed form, with the printing direction of the printer, an angle of less than 45 degrees.
  • direction printing the axis perpendicular to the successive planes along which the material is successively solidified and incorporated into the printed orthopedic sole, from the first to the last printing layer. In figure 3, it is the z axis, vertical.
  • a step 124 the 3D printing of the orthopedic sole 21 is carried out, including the self-gripping hooks, mushrooms and/or loops, and the surface finishing steps of this sole 21, in particular cleaning.
  • a covering provided with a self-gripping surface, for example provided with loops or made of velvet, 22 is fixed on the orthopedic sole 21 comprising the hooks 25 or mushrooms.
  • a step 126 a step 126,
  • Multi Jet Fusion (or “MJF") 3D printer from “HP” (or “Hewlett Packard”), four brands deposited.
  • the Multi Jet Fusion process is an additive manufacturing method developed and marketed by Hewlett-Packard (HP). This process allows the implementation of parts from powders of thermoplastic materials. During printing, the addition of liquid agents and the rise in temperature allow the melting of the material layer by layer. The parts obtained are supported by the powder bed and do not require the addition of any support, thus reducing post-processing operations. The parts obtained with a matt gray appearance have a good surface quality and can be delivered with a minimum of finishing operation.
  • the MJF process makes it possible to obtain reliability and a level of detail of the order of tenths of a millimetre. This reliability guarantees the perfect repeatability of the parts and ensures a level of detail that is both constant, part after part, and homogeneous over the entire surface of the printed orthopedic insole.
  • the material used for the production of the parts is, for example, a thermoplastic polymer of the polyamide type, PA-11 marketed by the company Arkema under the registered trademark Rilsan.
  • PA-11 whose isotropic performance (consistency of physical properties in all directions) is superior to that of PA-12 (registered trademark), makes it particularly suitable for the production of detail elements subject to mechanical stress. applied in various directions.
  • PA11 has better thermal stability, greater resistance to light and UV and good elasticity.
  • the hooks, and therefore the parts which comprise them are preferably oriented in a particular direction so that their main plane 101 , 103, 105 or their plane of symmetry 101, 103, 107, 109 forms, with the printing direction, vertical in FIG. 3, an angle less than 45 degrees. Without this orientation the hooks will be printed less well, or even not at all, in the case where the definition of the printer differs according to the axis along which this definition is observed.
  • the Z axis represents the vertical. This is the axis of movement of the build plate of the printer, also referred to as the printing axis above.
  • the X and Y directions thus define a plane on which the raw material is distributed in the form of successive layers of constant thickness.
  • the definition of the machine HP 5200
  • the definition of the machine is 1200 dpi (dots per inch) in X, Y and allows layers of 0.08 mm (in Z).
  • the main planes of these hooks are oriented in a vertical plane, parallel to the Y direction of the machine. The hooks are therefore oriented along the Y direction of the machine.
  • the printer given as an example above uses powder sintering. In other examples, a resin is used.

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  • Chemical & Material Sciences (AREA)
  • Engineering & Computer Science (AREA)
  • Manufacturing & Machinery (AREA)
  • Materials Engineering (AREA)
  • Slide Fasteners, Snap Fasteners, And Hook Fasteners (AREA)
  • Footwear And Its Accessory, Manufacturing Method And Apparatuses (AREA)
  • Printing Methods (AREA)

Abstract

The invention relates to an orthopedic sole (21, 22) which is printed by additive printing and has a surface of a hook-and-loop closure system, the hooks (25), mushrooms or loops (26) of which being printed by additive printing simultaneously with the remainder of the orthopedic sole.

Description

SEMELLE ORTHOPEDIQUE IMPRIMEE PAR FABRICATION ADDITIVE EN TROIS DIMENSIONS COMPORTANT UNE SURFACE AUTO-AGRIPPANTE, ET PROCEDE POUR LA FABRIQUER ORTHOPEDIC INSOLE PRINTED BY ADDITIVE FABRICATION IN THREE DIMENSIONS HAVING A SELF-GRIPPING SURFACE, AND METHOD FOR MAKING THE SAME
Domaine technique de l’invention Technical field of the invention
La présente invention concerne une semelle orthopédique imprimée par impression additive en trois dimensions, comportant une surface auto-agrippante, et un procédé pour la fabriquer. La présente invention s’applique, en particulier, au domaine de la fabrication sur mesure de semelles orthopédiques par impression additive en trois dimensions. The present invention relates to an orthopedic insole printed by three-dimensional additive printing, comprising a self-gripping surface, and a method for manufacturing it. The present invention applies, in particular, to the field of the custom manufacturing of orthopedic insoles by three-dimensional additive printing.
Etat de la technique State of the art
La podo-orthèse peut prendre différentes formes, selon la pathologie du pied à traiter, semelle orthopédique, chaussure orthopédique, attelle du pied, onychoplastie, etc. Il existe différents types de semelles orthopédiques, également appelées orthèse plantaire. The pedorthesis can take different forms, depending on the pathology of the foot to be treated, orthopedic insole, orthopedic shoe, foot splint, onychoplasty, etc. There are different types of orthopedic insoles, also called plantar orthotics.
Lorsque le pied est normal, la marche se déroule sans problème majeur : le pied s'allonge, les zones d'appui sont bien réparties et aucune gêne n'est constatée. Mais parfois, un déséquilibre dans la posture ou un problème héréditaire entraîne certaines déformations du pied comme les pieds creux, les orteils en griffe, un hallux valgus. Cela modifie la structure du pied, les zones d'appui sont modifiées et cela provoque des douleurs, une gêne lors de la marche, un boitement et/ou la présence de cors et de durillons aux pieds. Une semelle orthopédique vise à obtenir une correction et un soulagement. Les semelles orthopédiques constituent un substitut et permettent de corriger ces dysfonctionnements. When the foot is normal, walking takes place without major problems: the foot lengthens, the support zones are well distributed and no discomfort is observed. But sometimes, an imbalance in posture or a hereditary problem leads to certain foot deformities such as hollow feet, claw toes, hallux valgus. This changes the structure of the foot, the support zones are modified and this causes pain, discomfort when walking, limping and/or the presence of corns and calluses on the feet. An orthopedic insole aims to achieve correction and relief. Orthopedic insoles constitute a substitute and make it possible to correct these dysfunctions.
Elles sont insérées dans la chaussure et permettent : They are inserted into the shoe and allow:
- de mieux répartir l'appui du corps sur les pieds et diminuer la douleur (cors),- better distribute the support of the body on the feet and reduce pain (corns),
- d'assurer un soutien efficace du pied notamment lorsque les pieds sont plats ou creux,- provide effective support for the foot, especially when the feet are flat or hollow,
- d'équilibrer la marche, notamment lorsque le pied tourne vers l'intérieur ou l'extérieur, et - to balance the gait, especially when the foot turns inwards or outwards, and
- de diminuer les chocs subis lors de la marche ou d'activités sportives. - to reduce the shocks suffered during walking or sports activities.
Les semelles orthopédiques sont fabriquées sur mesure après des examens. Elles sont donc totalement personnelles. Le pédicure-podologue les réalise d'après un examen clinique, l'empreinte de pied et un examen de posturologie. The orthopedic insoles are made to measure after examinations. They are therefore totally personal. The pedicure-podiatrist performs them according to a clinical examination, the footprint and a posturology examination.
On distingue les semelles orthopédiques classiques des semelles de correction.A distinction is made between classic orthopedic insoles and corrective insoles.
Les semelles classiques sont utilisées préférentiellement pour diminuer les douleurs créées par un appui inégal. Elles sont insérées dans les chaussures d'usage quotidien car elles prennent peu de place. Les semelles de correction sont fabriquées selon l'empreinte du pied. Elles permettent de corriger l'appui et de diminuer les chocs. Mais elles sont souvent assez épaisses. Pratiques dans les chaussures de sport, elles sont moins adaptées aux chaussures de ville. Conventional insoles are preferentially used to reduce the pain created by uneven support. They are inserted in the shoes of daily use because they take up little space. Correction insoles are made according to the imprint of the foot. They make it possible to correct the support and to reduce the shocks. But they are often quite thick. Practical in sports shoes, they are less suitable for town shoes.
Dans tous les cas, il est nécessaire de superposer à ces semelles orthopédiques des recouvrements, aussi appelés « semelles de confort » ou « semelle de propreté » car ils assurent au moins ces deux fonctions. Mais ces semelles de confort ne doivent pas glisser sur les semelles orthopédiques, sous peine : In all cases, it is necessary to superimpose these orthopedic insoles overlays, also called "comfort insoles" or "cleaning insole" because they provide at least these two functions. But these comfort insoles must not slip on the orthopedic insoles, otherwise:
- de provoquer un frottement du pied sur la semelle orthopédique, ce qui peut provoquer des blessures superficielles et, - cause the foot to rub against the orthopedic sole, which can cause superficial injuries and,
- surtout, de se replier à une extrémité ou sur un bord de la chaussure, ce qui gêne la marche et élimine tout bénéfice de la présence d’une semelle orthopédique dans la chaussure. - above all, to fold up at one end or on one edge of the shoe, which hinders walking and eliminates any benefit of the presence of an orthopedic insole in the shoe.
Pour éviter ce glissement de la semelle de confort sur la semelle orthopédique, il n’est pas possible d’ajouter une fixation par fermeture auto-agrippante, composé de deux surfaces recouvertes de textures différentes permettant, lorsqu'on les met en contact, d'obtenir une liaison amovible. En effet, il faudrait fixer l’une de ces surfaces sur la semelle orthopédique, ce qui impose de la coller. Or, cette surcouche de tissu et de texture présente une épaisseur rédhibitoire pour l’insertion de la semelle orthopédique dans une chaussure. De plus, le collage impose une complexification de la fabrication de la semelle orthopédique car la forme de sa surface supérieure n’est pas développable. Il faudrait donc faire de nombreuses encoches sur le tissu auto-agrippant pour qu’une fois collé sur la semelle, il recouvre l’intégralité de la surface supérieure de la semelle orthopédique. Tout défaut, absence de tissu ou double épaisseur de tissu, est antagoniste avec la fonction de la semelle orthopédique et provoque une usure prématurée de la semelle de confort. To avoid this slipping of the comfort sole on the orthopedic sole, it is not possible to add a hook-and-loop fastener, consisting of two surfaces covered with different textures allowing, when they are brought into contact, to get a removable link. Indeed, it would be necessary to fix one of these surfaces on the orthopedic sole, which requires gluing it. However, this overlay of fabric and texture has a prohibitive thickness for the insertion of the orthopedic sole in a shoe. In addition, gluing imposes a complexification of the manufacture of the orthopedic insole because the shape of its upper surface is not developable. It would therefore be necessary to make many notches on the hook-and-loop fabric so that, once glued to the sole, it covers the entire upper surface of the orthopedic sole. Any defect, absence of fabric or double thickness of fabric, is antagonistic with the function of the orthopedic insole and causes premature wear of the comfort insole.
Devant l’impossibilité de réaliser une fixation par fermeture auto-agrippante, la pratique est de coller la semelle de confort sur la semelle orthopédique. Ce qui a deux nouveaux inconvénients. D’une part, la semelle de confort ne peut pas être détachée de la semelle orthopédique, pour la laver. Et les conditions de lavage peuvent abimer la semelle orthopédique, soit à cause des agents chimiques utilisés, soit à cause de la température utilisée. De plus, le collage provoque des émissions de composés organiques volatils dangereux pour l’opérateur puis potentiellement dangereuses pour l’utilisateur de la semelle. Faced with the impossibility of making a hook-and-loop fastening, the practice is to glue the comfort insole to the orthopedic insole. Which has two new drawbacks. On the one hand, the comfort insole cannot be detached from the orthopedic insole, to wash it. And the washing conditions can damage the orthopedic insole, either because of the chemical agents used, or because of the temperature used. In addition, sticking causes emissions of volatile organic compounds that are dangerous for the operator and then potentially dangerous for the user of the sole.
On connaît le document WO2014100462, qui décrit une chaussure réalisée par impression additive. A la place d’un lacet, il est envisagé l’impression simultanée des deux surfaces d’un tissu auto-agrippant pour former un moyen de fermeture, tel que connu dans les chaussures munies de scratch pour refermer la chaussure sur le pied. On connaît aussi le document CA3033732, qui décrit une semelle orthopédique sans scratch imprimée par impression additive. Document WO2014100462 is known, which describes a shoe produced by additive printing. Instead of a lace, it is envisaged the simultaneous printing of the two surfaces of a self-gripping fabric to form a means of closure, as known in shoes provided with Velcro to close the shoe on the foot. The document CA3033732 is also known, which describes an orthopedic insole without scratch printed by additive printing.
En conclusion, il n’existe aucune solution au problème de la fixation amovible d’une semelle de confort sur une semelle orthopédique. Présentation de l’invention In conclusion, there is no solution to the problem of removable attachment of a comfort insole to an orthopedic insole. Presentation of the invention
La présente invention vise à remédier à tout ou partie de ces inconvénients. The present invention aims to remedy all or part of these drawbacks.
À cet effet, la présente invention vise, selon un premier aspect, une semelle orthopédique imprimée par impression additive, comportant une surface d’un système de fixation par fermeture auto-agrippante, dont les crochets, champignons ou boucles sont imprimés par impression additive simultanément au reste de la semelle. To this end, the present invention relates, according to a first aspect, to an orthopedic insole printed by additive printing, comprising a surface of a hook-and-loop fastening system, the hooks, mushrooms or loops of which are printed by additive printing simultaneously to the rest of the sole.
Les fermetures auto-agrippantes, connues sous la marque déposée « Velcro », sont aussi appelées « scratch » dans le langage familier (onomatopée du bruit fait par la séparation de la fixation). Comme rappelé ci-dessus, ce système est composé de deux surfaces recouvertes de textures différentes permettant, lorsqu'on les met en contact, d'obtenir une liaison amovible. L’une des dénominations en anglais de ces systèmes de fermeture est “hook and loop” (pour « crochet et boucle »), même si ces systèmes de fermeture peuvent prendre d’autres formes, notamment « crochet et velours », « champignon et boucle » et « champignon et velours ». Hook-and-loop fasteners, known by the trademark "Velcro", are also called "scratch" in colloquial parlance (onomatopoeia of the noise made by the separation of the fastener). As mentioned above, this system is composed of two surfaces covered with different textures making it possible, when brought into contact, to obtain a removable connection. One of the names in English of these closure systems is “hook and loop” (for “hook and loop”), although these closure systems can take other forms, in particular “hook and velvet”, “mushroom and loop” and “mushroom and velvet”.
L’une des surfaces auto-agrippantes est rugueuse et comporte des crochets et/ou des champignons. L’autre des surfaces auto-agrippantes est douce et porte des boucles ou est constituée de velours. One of the hook-and-loop surfaces is rough and has hooks and/or fungus. The other of the hook-and-loop surfaces is soft and has loops or is made of velour.
Grâce à la mise en œuvre de la présente invention, des semelles orthopédiques imprimées en 3D (pour trois dimensions) comportent nativement une surface auto-agrippante faisant corps avec le reste de la semelle. La fabrication de ces semelles orthopédiques susceptibles d’être liées par simple contact avec une surface auto-agrippante de type opposé, est ainsi simplifiée et la semelle orthopédique est plus résistante. La présente invention s’applique particulièrement aux semelles orthopédiques de formes complexes non développables pour lesquelles la pose ultérieure d’une surface auto-agrippante serait particulièrement délicate. La présente invention s’applique aussi particulièrement aux semelles orthopédiques fines, pour lesquels le collage ou la couture d’une surface auto-agrippante additionnelle augmenterait l’épaisseur au-delà des spécifications techniques de cette semelle orthopédique. Thanks to the implementation of the present invention, orthopedic insoles printed in 3D (for three dimensions) natively comprise a hook-and-loop surface that is integral with the rest of the sole. The manufacture of these orthopedic insoles, which can be bonded by simple contact with a self-gripping surface of the opposite type, is thus simplified and the orthopedic insole is more resistant. The present invention applies particularly to orthopedic insoles of complex non-developable shapes for which the subsequent fitting of a self-gripping surface would be particularly difficult. The present invention also applies particularly to thin orthopedic insoles, for which the gluing or sewing of an additional hook-and-loop surface would increase the thickness beyond the technical specifications of this orthopedic insole.
Grâce à la mise en œuvre de l’invention, une semelle de confort ou de propreté munie d’une surface auto-agrippante, par exemple de boucles ou de velours, peut être fixée à la semelle orthopédique par simple appui et détachée par application d’une force manuelle, sans outil, par exemple pour son lavage. Thanks to the implementation of the invention, a comfort or insole provided with a self-gripping surface, for example loops or velvet, can be fixed to the orthopedic insole by simple support and detached by application of manual force, without tools, for example for washing.
Dans des modes de réalisation, la semelle orthopédique comporte des crochets et/ou des champignons d’une surface auto-agrippante imprimés par impression additive. In embodiments, the orthopedic insole has hooks and/or mushrooms of a hook-and-loop surface printed by additive printing.
Grâce à ces dispositions, la semelle orthopédique peut être fixée à toute surface comportant des boucles ou du velours, par exemple une semelle de confort ou de propreté. Dans des modes de réalisation, la semelle orthopédique comporte des crochets s’étendant dans un plan et/ou présentant un plan de symétrie, ces plans des crochets faisant, avec une direction prédéterminée, un angle inférieur à 45 degrés. Thanks to these provisions, the orthopedic sole can be attached to any surface comprising loops or velvet, for example a comfort or cleanliness sole. In some embodiments, the orthopedic sole comprises hooks extending in a plane and/or having a plane of symmetry, these planes of the hooks making, with a predetermined direction, an angle less than 45 degrees.
Grâce à ces dispositions, l’impression des crochets est facilitée notamment lorsque la direction prédéterminée est la direction d’impression, orthogonale du plan d’addition successive de matière. De plus, la résistance de ces crochets aux efforts de cisaillement appliqués à la fixation est anisotrope, ce qui permet de faire correspondre la direction de résistance maximale, c’est-à-dire le plan des crochets, à la direction dans laquelle s’appliquent les efforts de cisaillement les plus importants. Ces crochets présentant un angle inférieur à 45 degrés, et préférentiellement inférieur à 30 degrés, avec la direction prédéterminée peuvent être complétés, sur la semelle, par des crochets ne présentant pas un angle inférieur à 45 degrés avec la direction prédéterminée. Thanks to these provisions, the printing of the hooks is facilitated in particular when the predetermined direction is the direction of printing, orthogonal to the plane of successive addition of material. In addition, the resistance of these hooks to shear forces applied to the fastener is anisotropic, which makes it possible to match the direction of maximum resistance, that is to say the plane of the hooks, to the direction in which apply the greatest shear forces. These hooks having an angle of less than 45 degrees, and preferably less than 30 degrees, with the predetermined direction can be supplemented, on the sole, by hooks not having an angle of less than 45 degrees with the predetermined direction.
Dans des modes de réalisation, la forme des crochets est une boucle plane ouverte de section radiale circulaire, la hauteur de chaque crochet mesurée perpendiculairement à partir de son ancrage à une surface de la partie fonctionnelle de la semelle étant comprise entre 0,75 et 2 mm et le diamètre des sections circulaires étant compris entre 0,2 et 0,75 mm. In embodiments, the shape of the hooks is an open planar loop of circular radial section, the height of each hook measured perpendicularly from its anchorage to a surface of the functional part of the sole being between 0.75 and 2 mm and the diameter of the circular sections being between 0.2 and 0.75 mm.
Les inventeurs ont déterminé que ces caractéristiques géométriques offrent un bon compromis de confort et de résistance aux efforts de cisaillement de la fixation. The inventors have determined that these geometric characteristics offer a good compromise of comfort and resistance to shear stresses of the binding.
Dans des modes de réalisation, les crochets sont répartis en quinconce sur la surface de la partie fonctionnelle de la semelle et séparés par une distance constante comprise entre 1 mm et 3 mm. In embodiments, the hooks are staggered over the surface of the functional part of the sole and separated by a constant distance of between 1 mm and 3 mm.
Les inventeurs ont déterminé que ces caractéristiques géométriques offrent un bon compromis de confort et de résistance aux efforts de cisaillement de la fixation. The inventors have determined that these geometric characteristics offer a good compromise of comfort and resistance to shear stresses of the binding.
Selon un deuxième aspect, la présente invention vise un procédé d’impression d’une semelle orthopédique par impression additive, qui comporte l’impression additive : According to a second aspect, the present invention relates to a process for printing an orthopedic insole by additive printing, which comprises additive printing:
- d’une partie fonctionnelle monobloc de la semelle orthopédique et - a one-piece functional part of the orthopedic insole and
- de champignons, crochets ou boucles d’une surface auto-agrippante sur au moins une partie de la surface de cette partie fonctionnelle. - mushrooms, hooks or loops of a self-gripping surface on at least part of the surface of this functional part.
Dans des modes de réalisation, au cours de l’impression additive de la semelle orthopédique, on imprime des crochets, chaque crochet s’étendant dans un plan, les plans des crochets faisant un angle inférieur à 45 degrés avec la direction d’impression, orthogonale du plan d’addition ou de solidification successive de matière. In embodiments, during the additive printing of the orthopedic insole, hooks are printed, each hook extending in a plane, the planes of the hooks forming an angle less than 45 degrees with the direction of printing, orthogonal to the plane of successive addition or solidification of matter.
Dans des modes de réalisation, au cours de l’impression, on met en œuvre une poudre de matière thermoplastique, l’impression comportant au moins de chauffer cette poudre. In some embodiments, during the printing, a powder of thermoplastic material is used, the printing comprising at least heating this powder.
Dans des modes de réalisation, au cours de l’impression, on effectue un apport d'agent liquide. Dans des modes de réalisation, au cours de l’impression, on met en œuvre un polymère thermoplastique de type polyamide. In embodiments, during printing, a supply of liquid agent is carried out. In some embodiments, during printing, a thermoplastic polymer of the polyamide type is used.
Les avantages, buts et caractéristiques particulières de ce procédé étant similaires à ceux de la semelle orthopédique obtenue par la mise en œuvre de l’invention, ils ne sont pas rappelés ici. The advantages, aims and particular characteristics of this method being similar to those of the orthopedic insole obtained by the implementation of the invention, they are not repeated here.
Brève description des figures Brief description of figures
D’autres avantages, buts et caractéristiques de la présente invention ressortiront de la description qui va suivre, faite dans un but explicatif et nullement limitatif en regard du dessin annexé, dans lequel : Other advantages, objects and characteristics of the present invention will emerge from the description which follows, given for the purpose of explanation and in no way limiting with regard to the appended drawing, in which:
La figure 1 représente, en perspective, une coupe d’un mode de réalisation particulier d’une semelle orthopédique imprimée avec une surface auto-agrippante, lié à un objet supportant des parties de boucles, fixés entre eux par ces surfaces, Figure 1 shows, in perspective, a section of a particular embodiment of an orthopedic insole printed with a self-gripping surface, linked to an object supporting parts of buckles, fixed together by these surfaces,
La figure 2 représente, en coupe, la semelle orthopédique et l’objet supportant des parties de boucles illustrés en figure 1 , détachés, Figure 2 shows, in section, the orthopedic sole and the object supporting parts of loops illustrated in Figure 1, detached,
La figure 3 représente, en perspective schématique, une surface auto-agrippante en cours de fabrication dans une imprimante 3D à impression additive, Figure 3 shows, in schematic perspective, a self-gripping surface being manufactured in an additive printing 3D printer,
La figure 4 représente, en coupe, une semelle orthopédique objet de l’invention et une semelle de confort, séparées, FIG. 4 represents, in section, an orthopedic insole which is the subject of the invention and a comfort insole, separated,
La figure 5 représente, en coupe, les semelles illustrées en figure 5, agrippées entre elles, Figure 5 shows, in section, the soles illustrated in Figure 5, gripped together,
La figure 6 représente, en perspective, un premier mode de réalisation d’une semelle orthopédique objet de l’invention, FIG. 6 represents, in perspective, a first embodiment of an orthopedic insole which is the subject of the invention,
La figure 7 représente, en perspective, la semelle orthopédique illustrée en figure 6 et une semelle de confort, séparées, FIG. 7 represents, in perspective, the orthopedic sole illustrated in FIG. 6 and a comfort sole, separated,
La figure 8 représente, en perspective, les semelles illustrées en figure 7, agrippées entre elles, Figure 8 shows, in perspective, the soles illustrated in Figure 7, gripped together,
La figure 9 représente, en perspective, un deuxième mode de réalisation d’une semelle orthopédique objet de l’invention, FIG. 9 represents, in perspective, a second embodiment of an orthopedic insole which is the subject of the invention,
La figure 10 représente, en perspective, un troisième mode de réalisation d’une semelle orthopédique objet de l’invention, FIG. 10 represents, in perspective, a third embodiment of an orthopedic insole which is the subject of the invention,
La figure 11 représente, en perspective, un quatrième mode de réalisation d’une semelle orthopédique objet de l’invention, FIG. 11 represents, in perspective, a fourth embodiment of an orthopedic insole which is the subject of the invention,
La figure 12 représente, en perspective, un cinquième mode de réalisation d’une semelle orthopédique objet de l’invention, FIG. 12 represents, in perspective, a fifth embodiment of an orthopedic insole which is the subject of the invention,
La figure 13 représente, en vue de côté, la semelle orthopédique illustrée en figure 12, La figure 14 représente des exemples de crochets, champignons et boucles imprimés selon le procédé objet de l’invention, et Figure 13 shows, in side view, the orthopedic sole illustrated in figure 12, FIG. 14 represents examples of hooks, mushrooms and loops printed according to the method which is the subject of the invention, and
La figure 15 représente, sous forme d’un logigramme, des étapes d’un mode de réalisation particulier du procédé de fabrication d’une semelle orthopédique objet de la présente invention. FIG. 15 represents, in the form of a flowchart, the steps of a particular embodiment of the method of manufacturing an orthopedic insole which is the subject of the present invention.
Description des modes de réalisation Description of embodiments
La présente description est donnée à titre non limitatif, chaque caractéristique d’un mode de réalisation pouvant être combinée à toute autre caractéristique de tout autre mode de réalisation, de manière avantageuse. This description is given on a non-limiting basis, each characteristic of an embodiment being able to be combined with any other characteristic of any other embodiment, in an advantageous manner.
On note, dès à présent, que les figures 1 , 2 et 4 à 14 sont à l’échelle, mais que les échelles de représentation peuvent être différentes entre ces figures. We note, from now on, that figures 1, 2 and 4 to 14 are to scale, but that the scales of representation can be different between these figures.
Dans toute la description, on appelle « dessus », en ce qui concerne les semelles et l’imprimante, ce qui se trouve en haut pendant l’usage, respectivement, de la semelle insérée dans une chaussure, d’une part, et de l’imprimante, d’autre part. On appelle « vue de côté » d’une semelle une vue de la semelle dans sa longueur, perpendiculaire à une vue de dessus. Throughout the description, the term “top”, with regard to the soles and the printer, is what is at the top during use, respectively, of the sole inserted in a shoe, on the one hand, and of the printer, on the other hand. A "side view" of a sole is a view of the sole along its length, perpendicular to a top view.
On observe, en figures 1 et 2, un assemblage 20 : We observe, in Figures 1 and 2, an assembly 20:
- d’une semelle orthopédique 21 imprimée par impression additive 3D avec des crochets 25 en face supérieure, et - an orthopedic insole 21 printed by 3D additive printing with hooks 25 on the upper face, and
- d’un objet 22 portant des boucles 26 en face inférieure. - an object 22 carrying loops 26 on the underside.
Les crochets 25 et les boucles 26, configurés pour que les crochets traversent les boucles, constituent une fixation auto-agrippante. Hooks 25 and loops 26, configured so that the hooks pass through the loops, constitute a hook-and-loop fastener.
La zone de fixation auto-agrippante 24 comporte les crochets 25 et les boucles 26, soit liées entre eux (figure 1), soit séparés (figure 2). L’objet 22 présente une surface supérieure 23. The self-gripping fastening zone 24 comprises the hooks 25 and the loops 26, either linked together (FIG. 1), or separated (FIG. 2). The object 22 has an upper surface 23.
On note que l’objet 22 peut, comme la semelle orthopédique 21 , être imprimé en impression additive 3D avec les boucles 26 qui garnissent sa surface inférieure. It is noted that the object 22 can, like the orthopedic sole 21, be printed in 3D additive printing with the loops 26 which line its lower surface.
Dans la suite de la description, on s’intéresse au cas particulier dans lequel l’objet 22 une semelle de confort ou de propreté, l’assemblage de ces éléments étant destiné à être introduit dans une chaussure d’une personne qui a besoin d’une correction orthopédique. Bien entendu, la présente invention ne se limite pas à ce type d’éléments. In the following description, we are interested in the particular case in which the object 22 a comfort or cleanliness sole, the assembly of these elements being intended to be introduced into a shoe of a person who needs an orthopedic correction. Of course, the present invention is not limited to this type of element.
Dans la suite de la description, on considère le cas où la semelle orthopédique 21 , dont les modes de réalisation particuliers sont référencés 41 , 51 , 61 , 71 , 81 ou 91 en figures 4 à 13, comporte des crochets d’une fixation auto-agrippante. Bien que ce soit le mode de réalisation préféré de l’invention, la semelle orthopédique 21 peut aussi, dans le cadre de l’invention, porter des champignons et/ou des boucles d’une fixation auto-agrippante. On observe, en figure 3, une imprimante additive 3D 30 en cours d’impression d’une semelle orthopédique 21. Le référentiel géométrique 32 comporte trois directions orthogonales, l’axe X des x et l’axe Y des y étant dans un plan horizontal et l’axe Z des z étant vertical. L’axe Z, vertical, est la direction d’impression. Le plan défini par les axes X et Y est parallèle aux plans successifs selon lesquels la matière est successivement solidifiée au cours de l’impression additive, c’est le plan successivement parcouru par la tête ou le plateau d’impression. In the following description, we consider the case where the orthopedic sole 21, the particular embodiments of which are referenced 41, 51, 61, 71, 81 or 91 in FIGS. - gripping. Although this is the preferred embodiment of the invention, the orthopedic sole 21 can also, within the scope of the invention, carry mushrooms and/or loops of a hook-and-loop fastener. We observe, in FIG. 3, a 3D additive printer 30 in the process of printing an orthopedic sole 21. The geometric reference frame 32 comprises three orthogonal directions, the X axis of the x and the Y axis of the y being in a plane horizontal and the Z axis of the z being vertical. The Z axis, vertical, is the printing direction. The plane defined by the X and Y axes is parallel to the successive planes according to which the material is successively solidified during additive printing, it is the plane successively traversed by the head or the printing plate.
Dans ce mode d’impression particulier, la semelle orthopédique 21 est imprimée dans une configuration telle que les plans principaux des crochets en cours d’impression ou leurs plans de symétrie forment un angle inférieur à 45 avec l’axe vertical et, préférentiellement, sont verticaux. Cette disposition permet une fabrication plus efficace et plus durable des crochets et une résistance aux efforts de cisaillement augmentée parallèlement à l’axe de ces plans. In this particular printing mode, the orthopedic sole 21 is printed in a configuration such that the main planes of the hooks being printed or their planes of symmetry form an angle less than 45 with the vertical axis and, preferentially, are vertical. This arrangement allows a more efficient and more durable manufacture of the hooks and an increased resistance to shear forces parallel to the axis of these planes.
L’imprimante 3D 30 permet la mise en œuvre d’un mode de réalisation particulier du procédé objet de l’invention, qui consiste à recouvrir la surface supérieure de la semelle orthopédique par un ensemble de crochets dont la forme, les dimensions et la densité ont été spécialement spécifié pour : The 3D printer 30 allows the implementation of a particular embodiment of the method that is the subject of the invention, which consists in covering the upper surface of the orthopedic insole with a set of hooks whose shape, dimensions and density have been specially specified for:
- apporter la meilleure adhérence possible entre la semelle et le recouvrement et- provide the best possible grip between the sole and the covering and
- être produits lors de la même opération de fabrication que la semelle. - be produced during the same manufacturing operation as the sole.
Les avantages comportent : Benefits include:
A/ Du point de vue de la production : A/ From a production point of view:
- ce procédé permet de réduire le nombre de phases de production car une seule opération permet de produire la semelle et son système d'adhésion au recouvrement, - this process makes it possible to reduce the number of production phases because a single operation makes it possible to produce the sole and its system of adhesion to the covering,
- ce procédé permet de fixer le recouvrement à la semelle sans avoir recours à l'usage de colle, réduisant à la fois l'exposition des opérateurs à des solvants tout en diminuant les coûts de production lié au consommable. - this process makes it possible to fix the covering to the sole without resorting to the use of glue, reducing both the exposure of operators to solvents while reducing the production costs linked to the consumable.
B/ Du point de vue du podologue : B/ From the podiatrist's point of view:
- le produit ainsi obtenu peut-être remplacé ou modifié plus facilement, les recouvrements pouvant être enlevés et remis en place sans laisser de trace. - the product thus obtained can be replaced or modified more easily, the covers being able to be removed and put back in place without leaving a trace.
C/ Du point de vue de l'utilisateur : C/ From the user's point of view:
- pour une semelle donnée, l'utilisateur peut lui-même et simplement changer de recouvrement, c’est-à-dire la semelle de confort, et adapter le produit à son usage et à ses chaussures, - for a given sole, the user can himself and simply change the covering, i.e. the comfort sole, and adapt the product to his use and his shoes,
- l'entretien est facilité par la possibilité de nettoyer séparément le recouvrement et les semelles, et - maintenance is facilitated by the possibility of cleaning the cover and the soles separately, and
- la durabilité de la semelle est prolongé par la facilitation du changement du recouvrement qui est la pièce de plus grande usure. On observe, en figures 4 et 5, que la présente invention s’applique particulièrement bien aux surfaces non-développables 41 et 46, par exemple des portions de sphères, d’ellipsoïdes, de paraboloïdes ou d’hyperboloïdes. En effet, la présente invention permet une répartition uniforme de crochets, champignons ou boucles 45 sur ces surfaces, ce que ne permettrait pas une surface de tissu auto-agrippant rapportée sur cette semelle orthopédique. L’assemblage 40 comporte ainsi une semelle orthopédique 41 imprimée par impression additive 3D avec des crochets 45 en face supérieure, et un objet 42 portant des boucles 46 en face inférieure et une surface d’appui 43 en face supérieure. Comme on l’observe en figure 5, la fixation de la semelle orthopédique 41 et de l’objet 42 par les éléments auto-agrippant 45 et 46 est uniforme et d’épaisseur constante. - the durability of the sole is prolonged by facilitating the change of the covering which is the part of greatest wear. It is observed, in FIGS. 4 and 5, that the present invention applies particularly well to non-developable surfaces 41 and 46, for example portions of spheres, ellipsoids, paraboloids or hyperboloids. Indeed, the present invention allows a uniform distribution of hooks, mushrooms or loops 45 on these surfaces, which would not allow a hook-and-loop fabric surface attached to this orthopedic sole. The assembly 40 thus comprises an orthopedic sole 41 printed by 3D additive printing with hooks 45 on the upper face, and an object 42 carrying loops 46 on the lower face and a support surface 43 on the upper face. As can be seen in FIG. 5, the fixing of the orthopedic sole 41 and of the object 42 by the self-gripping elements 45 and 46 is uniform and of constant thickness.
Les figures 6 à 13 donnent des représentations de différents modèles de semelles orthopédiques 51 à 91. Selon les pieds, les poitures, les éléments et les traitements à appliquer, leurs formes peuvent varier. Cependant, préférentiellement, la surface supérieure reste toujours intégralement couverte par les crochets 55 à 95. Figures 6 to 13 give representations of different models of orthopedic insoles 51 to 91. Depending on the feet, the poitures, the elements and the treatments to be applied, their shapes may vary. However, preferably, the upper surface always remains entirely covered by the hooks 55 to 95.
Les figures 6 à 8 représentent une semelle orthopédique standard 51 (modèle « PCL »), sans aucun élément de podologie appliqué et dont la forme suit la morphologie du pied du patient. La surface supérieure de cette semelle 51 comporte des crochets 55 sur sa face supérieure. Un recouvrement 52 comportant une surface inférieure 56 en velours ou garni de boucles se fixe sur cette semelle 51 par simple appui pour former un assemblage 50, comme illustré en figure 8. Ce recouvrement 52 peut être retiré à volonté de la semelle 51 en tirant sur sa surface en partant d’un bord de la semelle 51 . FIGS. 6 to 8 represent a standard orthopedic insole 51 (“PCL” model), without any podiatry element applied and whose shape follows the morphology of the patient's foot. The upper surface of this sole 51 has hooks 55 on its upper face. A covering 52 comprising a lower surface 56 in velvet or lined with loops is fixed to this sole 51 by simple pressing to form an assembly 50, as illustrated in FIG. 8. This covering 52 can be removed at will from the sole 51 by pulling on its surface starting from an edge of the sole 51 .
La figure 9 représente le même modèle (« PCL ») de semelle avec deux éléments thérapeutiques qui altèrent sa forme. A l'avant de la semelle orthopédique 61 munie de crochets 65, on observe un élément 68 de type BRC (Barre Rétro Capitale). Un évidement 67 du talon est réalisé à l’arrière de la semelle orthopédique 61. FIG. 9 represents the same model (“PCL”) of insole with two therapeutic elements which alter its shape. At the front of the orthopedic sole 61 provided with hooks 65, there is an element 68 of the BRC (Retro Capital Bar) type. A recess 67 of the heel is made behind the orthopedic sole 61.
La figure 10 représente le même modèle de semelle orthopédique 71 comportant des crochets 75 sur sa face supérieure, avec des éléments sous-capital 79 pour le gros orteil et sous-capital 78 pour le dernier orteil et une talonnette 77. FIG. 10 represents the same model of orthopedic sole 71 comprising hooks 75 on its upper face, with sub-capital 79 elements for the big toe and sub-capital 78 for the last toe and a heel piece 77.
La figure 11 représente toujours le même modèle de semelle orthopédique 81 comportant des crochets 85 en face supérieure, en version « semelle entière » qui permet de produire des semelles qui traitent le pied en entier, orteils compris. FIG. 11 still shows the same model of orthopedic sole 81 comprising hooks 85 on the upper face, in the “entire sole” version which makes it possible to produce soles which treat the entire foot, toes included.
Les figures 12 et 13 représentent un modèle « SPC » de semelle orthopédique 91 comportant des crochets 95, dédiée en particulier aux pratiques sportives. Cette semelle 91 comporte des fentes 97, qui peuvent varier en profondeur et en nombre pour appliquer divers traitements. Figures 12 and 13 represent an "SPC" model of orthopedic sole 91 comprising hooks 95, dedicated in particular to sports practices. This sole 91 has slots 97, which can vary in depth and number to apply various treatments.
Concernant la forme des crochets 25 (pouvant constituer les crochets 45, 55, 65, 75, 85 et 95), la figure 14 en présente cinq formes, 100, 102, 104, 106 et 108 sur la semelle orthopédique 21. Leur implantation à la surface supérieure de la semelle orthopédique 21 , varie en complexité, en épaisseur, en hauteur et en densité de répartition sur la surface. Regarding the shape of the hooks 25 (which may constitute the hooks 45, 55, 65, 75, 85 and 95), FIG. 14 shows five shapes, 100, 102, 104, 106 and 108 on the sole orthopedic 21. Their location on the upper surface of the orthopedic sole 21 varies in complexity, thickness, height and density of distribution on the surface.
Les différentes formes sont représentées sur des lignes différentes de la figure 14. Sur chaque ligne, de gauche à droite, la figure la plus à gauche est une vue de côté, la figure suivante est une vue de dessus, c’est-à-dire perpendiculairement à la surface de la semelle orthopédique, la figure suivante est une vue de face et la figure la plus à droite est une vue en perspective. The different shapes are shown on different rows in Figure 14. On each row, from left to right, the leftmost figure is a side view, the next figure is a top view, i.e. say perpendicular to the surface of the orthopedic insole, the following figure is a front view and the rightmost figure is a perspective view.
La forme 100 est un crochet simple tubulaire, de section radiale circulaire de diamètre constant. Cette forme 100 en point d’interrogation est symétrique par rapport à un plan 101 , qui forme le plan général de cette forme 100. Form 100 is a simple tubular hook, of circular radial section of constant diameter. This shape 100 as a question mark is symmetrical with respect to a plane 101 , which forms the general plane of this shape 100.
La forme 102 est un double crochet de plan général 103, plan de symétrie formant la plus grande intersection avec la forme 102. Shape 102 is a double hook with general plane 103, plane of symmetry forming the greatest intersection with shape 102.
La forme 104 est un double crochet proche de la forme 102, mais dont les crochets sont légèrement incurvés en dehors du plan général 105. Last 104 is a double hook similar to last 102, but whose hooks are slightly curved outside the general plane 105.
La forme 106 est un double crochet dont les crochets forment, entre eux, un angle, préférentiellement inférieur à 90 degrés et, ici, de 60 degrés environ. Form 106 is a double hook, the hooks of which form an angle between them, preferably less than 90 degrees and, here, approximately 60 degrees.
La forme 108 est un triple crochet possédant une symétrie de révolution. Shape 108 is a triple hook with rotational symmetry.
On note que, sur la surface de la semelle orthopédique 21 à imprimer, on peut prévoir une alternance de sens d’ouverture opposés des crochets. It is noted that, on the surface of the orthopedic sole 21 to be printed, an alternation of opposite opening directions of the hooks can be provided.
Préférentiellement, comme illustré en figure 14, chaque crochet s’étend dans un plan (crochets 100, 102, 104), dit principal, et/ou présente un plan de symétrie (crochets 100, 102, 106, 108), ces plans des crochets faisant, avec une direction prédéterminée 110, un angle inférieur à 45 degrés et, préférentiellement, inférieur à 30 degrés. Preferably, as illustrated in FIG. 14, each hook extends in a plane (hooks 100, 102, 104), called main, and/or has a plane of symmetry (hooks 100, 102, 106, 108), these planes of the hooks making, with a predetermined direction 110, an angle less than 45 degrees and, preferably, less than 30 degrees.
L’impression des crochets est ainsi facilitée notamment lorsque la direction prédéterminée est la direction d’impression (Z en figure 3), orthogonale du plan (X, Y, en figure 3) d’addition ou de solidification successive de matière. De plus, la résistance de ces crochets aux efforts de cisaillement appliqués à la fixation est anisotrope, ce qui permet de faire correspondre la direction de résistance maximale, c’est-à-dire le plan des crochets, à la direction dans laquelle s’appliquent les efforts de cisaillement les plus importants sur la semelle orthopédique. Ces crochets présentant un angle inférieur à 45 degrés avec la direction prédéterminée peuvent être complétés, sur la semelle, par des crochets ne présentant pas un angle inférieur à 45 degrés avec la direction prédéterminée, par exemple, la partie représentée à droite du double crochet 106 ou les deux parties représentées en bas du triple crochet 108. Cependant, préférentiellement, tous les crochets forment un angle inférieur à 45 degrés et, préférentiellement, inférieur à 30 degrés avec la direction prédéterminée. Préférentiellement aussi, cette direction prédéterminée est la direction d’impression. Pour l’application aux semelles orthopédiques 21 , 41 , 51 , 61 , 71 , 81 et 91 , une forme optimale 100 du crochet est une boucle plane ouverte vers le bas, du côté de la face supérieure de la semelle. Cette boucle plane 100 ouverte possède préférentiellement une section radiale circulaire. La hauteur de chaque crochet mesurée perpendiculairement à partir de son ancrage à une surface de la partie fonctionnelle de la semelle est préférentiellement comprise entre 0,75 et 2 mm. Le diamètre des sections circulaires est préférentiellement compris entre 0,2 et 0,75 mm. Par exemple, la hauteur de la boucle plane est de 1 ,25 mm et sa section possède un diamètre de 0,5 mm. The printing of the hooks is thus facilitated in particular when the predetermined direction is the printing direction (Z in FIG. 3), orthogonal to the plane (X, Y, in FIG. 3) of successive addition or solidification of material. In addition, the resistance of these hooks to shear forces applied to the fastener is anisotropic, which makes it possible to match the direction of maximum resistance, that is to say the plane of the hooks, to the direction in which apply the greatest shear forces to the orthopedic insole. These hooks having an angle less than 45 degrees with the predetermined direction can be supplemented, on the sole, by hooks not having an angle less than 45 degrees with the predetermined direction, for example, the part represented to the right of the double hook 106 or the two parts represented at the bottom of the triple hook 108. However, preferably, all the hooks form an angle less than 45 degrees and, preferably, less than 30 degrees with the predetermined direction. Also preferably, this predetermined direction is the printing direction. For application to orthopedic soles 21, 41, 51, 61, 71, 81 and 91, an optimal shape 100 of the hook is a flat loop open downwards, on the side of the upper face of the sole. This open planar loop 100 preferably has a circular radial section. The height of each hook measured perpendicularly from its anchoring to a surface of the functional part of the sole is preferably between 0.75 and 2 mm. The diameter of the circular sections is preferably between 0.2 and 0.75 mm. For example, the height of the plane loop is 1.25 mm and its section has a diameter of 0.5 mm.
Concernant le positionnement des crochets sur la surface supérieure de la partie fonctionnelle orthopédique 21 , les crochets sont préférentiellement répartis en quinconce et séparés par une distance constante, préférentiellement comprise entre 1 mm et 3 mm, par exemple de 1 ,408 mm, auquel cas, on obtient une densité de 52 crochets par centimètre carré. Regarding the positioning of the hooks on the upper surface of the orthopedic functional part 21, the hooks are preferably staggered and separated by a constant distance, preferably between 1 mm and 3 mm, for example 1.408 mm, in which case, a density of 52 hooks per square centimeter is obtained.
Les crochets recouvrent l'intégralité de la surface supérieure de la semelle dont ils suivent les contours à une distance d'au moins 1 ,5mm, c’est-à-dire qu’il n’y a pas de crochets sur la périphérie de la semelle, jusqu’à 1 ,5 mm du bord. The hooks cover the entire upper surface of the sole, the contours of which they follow at a distance of at least 1.5 mm, i.e. there are no hooks on the periphery of the sole. the sole, up to 1.5 mm from the edge.
Selon le modèle de semelle orthopédique 21 , la géométrie de l'empreinte sur laquelle est appliquée la semelle et les différents paramètres mis en œuvre par l'utilisateur de la solution, la zone d'application des crochets 25 varie en forme et en aire. Le nombre de crochets 25 s'adapte automatiquement par logiciel à la zone d'application et à la densité surfacique visée. Depending on the orthopedic insole model 21 , the geometry of the impression on which the insole is applied and the different parameters implemented by the user of the solution, the application zone of the hooks 25 varies in shape and in area. The number of hooks 25 is automatically adapted by software to the area of application and to the targeted surface density.
Si certains paramètres de l'application font varier l'épaisseur de la semelle orthopédique 21 , les points de référence de placement des crochets 25 suivent la variation d'épaisseur de telle sorte que les crochets 25 aient toujours la même hauteur par rapport à la surface supérieure de la partie fonctionnelle de la semelle orthopédique 21. If certain parameters of the application cause the thickness of the orthopedic sole 21 to vary, the placement reference points of the hooks 25 follow the variation in thickness so that the hooks 25 always have the same height with respect to the surface. upper of the functional part of the orthopedic sole 21.
Concernant l’orientation des crochets 25, afin de garantir une mise en œuvre idéale des crochets 25, ceux-ci sont préférentiellement orientés relativement à leur position lors de la fabrication plutôt que par rapport à leur position vis-à-vis de la surface de la semelle 21. Ainsi, les crochets 25 sont disposés de telle sorte que leurs plans principaux (par exemple, les plans 101 , 103 et 105) se retrouvent dans des plans verticaux parallèles lors du processus d'impression. Pour cela, le fichier représentant la semelle 21 à imprimer est transmis à l’imprimante en tenant compte de cette orientation préférentielle. Regarding the orientation of the hooks 25, in order to guarantee an ideal implementation of the hooks 25, these are preferably oriented relative to their position during manufacture rather than relative to their position vis-à-vis the surface of the the sole 21. Thus, the hooks 25 are arranged such that their main planes (for example, the planes 101, 103 and 105) are found in parallel vertical planes during the printing process. For this, the file representing the sole 21 to be printed is transmitted to the printer taking into account this preferential orientation.
La figure 15 représente des étapes d’un procédé 120 de fabrication d’une semelle orthopédique selon l’invention. Au cours d’une étape 121 , on effectue des mesures sur le pied du patient. Au cours d’une étape 122, on effectue la modélisation de la semelle orthopédique adaptée au patient. Au cours d’une étape optionnelle 123, on oriente le modèle de la semelle à imprimer pour que les plans généraux des crochets à imprimer forment, avec la direction d’impression de l’imprimante, un angle inférieur à 45 degrés. On appelle ici direction d’impression, l’axe perpendiculaire aux plans successifs selon lesquels la matière est successivement solidifiée et incorporée à la semelle orthopédique imprimée, de la première à la dernière couche d’impression. En figure 3, c’est l’axe des z, vertical. Au cours d’une étape 124, on réalise l’impression 3D de la semelle orthopédique 21 , y compris les crochets, champignons et/ou boucles auto-agrippants, et les étapes de finition de surface de cette semelle 21 , notamment nettoyage. Au cours d’une étape 125, on fixe un recouvrement muni d’une surface auto-agrippante, par exemple munie de boucles ou en velours, 22 sur la semelle orthopédique 21 comportant les crochets 25 ou des champignons. Au cours d’une étape 126,FIG. 15 represents steps of a method 120 for manufacturing an orthopedic sole according to the invention. During a step 121, measurements are taken on the patient's foot. During a step 122, the modeling of the orthopedic insole adapted to the patient is carried out. During an optional step 123, the model of the sole to be printed is oriented so that the general planes of the hooks to be printed form, with the printing direction of the printer, an angle of less than 45 degrees. Here we call direction printing, the axis perpendicular to the successive planes along which the material is successively solidified and incorporated into the printed orthopedic sole, from the first to the last printing layer. In figure 3, it is the z axis, vertical. During a step 124, the 3D printing of the orthopedic sole 21 is carried out, including the self-gripping hooks, mushrooms and/or loops, and the surface finishing steps of this sole 21, in particular cleaning. During a step 125, a covering provided with a self-gripping surface, for example provided with loops or made of velvet, 22 is fixed on the orthopedic sole 21 comprising the hooks 25 or mushrooms. During a step 126,
On décrit, ci-dessous, un exemple de mise en œuvre du procédé objet de l’invention, avec une imprimante 3D « Multi Jet Fusion » (ou « MJF ») de « HP » (ou « Hewlett Packard »), quatre marques déposées. Le processus Multi Jet Fusion est une méthode de fabrication additive développée et commercialisée par Hewlett-Packard (HP). Ce procédé permet la mise en œuvre de pièces à partir de poudres de matières thermoplastiques. Au cours de l'impression, l'apport d'agents liquides et la montée en température permettent la fusion de la matière couche par couche. Les pièces obtenues sont supportées par le lit de poudre et ne nécessitent l'ajout d'aucun support, réduisant ainsi les opérations de post-traitement. Les pièces obtenues d'aspect gris mat présentent une bonne qualité de surface et peuvent être délivrées avec un minimum d'opération de finition. An example of implementation of the method that is the subject of the invention is described below, with a "Multi Jet Fusion" (or "MJF") 3D printer from "HP" (or "Hewlett Packard"), four brands deposited. The Multi Jet Fusion process is an additive manufacturing method developed and marketed by Hewlett-Packard (HP). This process allows the implementation of parts from powders of thermoplastic materials. During printing, the addition of liquid agents and the rise in temperature allow the melting of the material layer by layer. The parts obtained are supported by the powder bed and do not require the addition of any support, thus reducing post-processing operations. The parts obtained with a matt gray appearance have a good surface quality and can be delivered with a minimum of finishing operation.
Outre ses qualités en matière de productivité, le procédé MJF permet d'obtenir une fiabilité et un niveau de détail de l'ordre du dixième de millimètre. Cette fiabilité garantie la parfaite répétabilité des pièces et assure un niveau de détail à la fois constant, pièces après pièces, et homogène sur l'ensemble de la surface de la semelle orthopédique imprimée. In addition to its qualities in terms of productivity, the MJF process makes it possible to obtain reliability and a level of detail of the order of tenths of a millimetre. This reliability guarantees the perfect repeatability of the parts and ensures a level of detail that is both constant, part after part, and homogeneous over the entire surface of the printed orthopedic insole.
Exemple de matériau utilisé : le PA-11 d'Arkema, deux marques déposées. Example of material used: Arkema's PA-11, two registered trademarks.
Parmi les différents matériaux disponibles pour la production en MJF, le matériau utilisé pour la production des pièces est, par exemple, un polymère thermoplastique de type polyamide, PA-11 commercialisé par la société Arkema sous la marque déposée Rilsan. Le PA-11 , dont les performances isotropes (constance des propriétés physiques dans toutes les directions) sont supérieures par rapport à celle du PA-12 (marque déposée), le rend particulièrement adapté à la production des éléments de détail soumis à des contraintes mécaniques appliquées dans des directions variées. D'une manière générale, comparé au PA- 12 (plus couramment employé en impression 3D et plus économique), le PA11 présente une meilleure stabilité thermique, une plus grande résistance à la lumière et aux UV et une bonne élasticité. Ces caractéristiques du PA-11 permettent d'obtenir une dimension, une densité et une tenues des crochets de la semelle orthopédique. Among the various materials available for production in MJF, the material used for the production of the parts is, for example, a thermoplastic polymer of the polyamide type, PA-11 marketed by the company Arkema under the registered trademark Rilsan. PA-11, whose isotropic performance (consistency of physical properties in all directions) is superior to that of PA-12 (registered trademark), makes it particularly suitable for the production of detail elements subject to mechanical stress. applied in various directions. In general, compared to PA-12 (more commonly used in 3D printing and more economical), PA11 has better thermal stability, greater resistance to light and UV and good elasticity. These characteristics of the PA-11 make it possible to obtain a dimension, a density and a behavior of the hooks of the orthopedic sole.
Concernant le placement des pièces dans l'imprimante 3D, afin d'assurer la meilleure mise en œuvre qui soit, les crochets, et donc les pièces qui les comportent sont préférentiellement orientés selon une direction particulière pour que leur plan principal 101 , 103, 105 ou leur plan de symétrie 101 , 103, 107, 109 forme, avec la direction d’impression, verticale en figure 3, un angle inférieur à 45 degrés. Sans cette orientation les crochets seront moins bien, voire pas du tout imprimés, dans le cas où la définition de l'imprimante diffère selon l'axe selon lequel cette définition est observée. Par convention, comme illustré en figure 3, l'axe Z représente la verticale. C’est l'axe de déplacement du plateau de production de l’imprimante, aussi appelé axe d’impression ci-dessus. Les directions X et Y définissent ainsi un plan sur lequel se répartie la matière première sous forme de couches successives d'épaisseur constante. Selon les spécificités fournies par le constructeur, la définition de la machine (HP 5200) est de 1200 ppp (points par pouce) en X, Y et permet des couches de 0,08 mm (en Z). Avec une telle haute résolution qui permet d'obtenir un niveau de détail efficient, il est possible de produire des crochets très petits permettant une bonne accroche aux boucles du recouvrement. Afin d'optimiser au mieux la qualité des crochets 25, les plans principaux de ces crochets sont orientés dans un plan vertical, parallèle à la direction Y de la machine. Les crochets sont donc orientés selon la direction Y de la machine. L’imprimante donnée comme exemple ci-dessus utilise le frittage de poudre. Dans d’autres exemples, on met en œuvre une résine. Regarding the placement of the parts in the 3D printer, in order to ensure the best possible implementation, the hooks, and therefore the parts which comprise them, are preferably oriented in a particular direction so that their main plane 101 , 103, 105 or their plane of symmetry 101, 103, 107, 109 forms, with the printing direction, vertical in FIG. 3, an angle less than 45 degrees. Without this orientation the hooks will be printed less well, or even not at all, in the case where the definition of the printer differs according to the axis along which this definition is observed. By convention, as illustrated in FIG. 3, the Z axis represents the vertical. This is the axis of movement of the build plate of the printer, also referred to as the printing axis above. The X and Y directions thus define a plane on which the raw material is distributed in the form of successive layers of constant thickness. According to the specifications provided by the manufacturer, the definition of the machine (HP 5200) is 1200 dpi (dots per inch) in X, Y and allows layers of 0.08 mm (in Z). With such a high resolution which allows to obtain an efficient level of detail, it is possible to produce very small hooks allowing a good grip on the loops of the covering. In order to best optimize the quality of the hooks 25, the main planes of these hooks are oriented in a vertical plane, parallel to the Y direction of the machine. The hooks are therefore oriented along the Y direction of the machine. The printer given as an example above uses powder sintering. In other examples, a resin is used.

Claims

REVENDICATIONS
1. Semelle orthopédique (21 , 22, 41 , 42, 51 , 61 , 71 , 81 , 91) imprimée par impression additive, caractérisé en ce qu’elle comporte une surface d’un système de fixation par fermeture auto agrippante, dont les crochets (25, 45, 55, 65, 75, 85, 95), champignons ou boucles (26, 46, 56) sont imprimés par impression additive simultanément au reste de la semelle orthopédique. 1. Orthopedic insole (21, 22, 41, 42, 51, 61, 71, 81, 91) printed by additive printing, characterized in that it comprises a surface with a self-gripping fastening system, the hooks (25, 45, 55, 65, 75, 85, 95), mushrooms or loops (26, 46, 56) are printed by additive printing simultaneously with the rest of the orthopedic insole.
2. Semelle orthopédique (21 , 41 , 51 , 61 , 71 , 81 , 91) selon la revendication 1 , qui comporte des crochets (25, 45, 55, 65, 75, 85, 95) et/ou des champignons d’une surface auto-agrippante imprimés par impression additive. 2. orthopedic insole (21, 41, 51, 61, 71, 81, 91) according to claim 1, which comprises hooks (25, 45, 55, 65, 75, 85, 95) and / or mushrooms of a hook-and-loop surface printed by additive printing.
3. Semelle orthopédique (21 , 41 , 51 , 61 , 71 , 81 , 91) selon l’une des revendications 1 ou 2, qui comporte des crochets (25, 45, 55, 65, 75, 85, 95), chaque crochet s’étendant dans un plan (101 , 103, 105) ou présentant un plan de symétrie (101 , 103, 107, 109), ces plans des crochets faisant, avec une direction prédéterminée, un angle inférieur à 45 degrés. 3. orthopedic sole (21, 41, 51, 61, 71, 81, 91) according to one of claims 1 or 2, which comprises hooks (25, 45, 55, 65, 75, 85, 95), each hook extending in a plane (101, 103, 105) or having a plane of symmetry (101, 103, 107, 109), these planes of the hooks making, with a predetermined direction, an angle less than 45 degrees.
4. Semelle orthopédique (21 , 41 , 51 , 61 , 71 , 81 , 91) selon l’une des revendications 1 à 3, dans laquelle la forme des crochets (25, 45, 55, 65, 75, 85, 95) est une boucle plane (100) ouverte de section radiale circulaire, la hauteur de chaque crochet mesurée perpendiculairement à partir de son ancrage à une surface de la partie fonctionnelle de la semelle étant comprise entre 0,75 et 2 mm et le diamètre des sections circulaires étant compris entre 0,2 et 0,75 mm. 4. orthopedic sole (21, 41, 51, 61, 71, 81, 91) according to one of claims 1 to 3, wherein the shape of the hooks (25, 45, 55, 65, 75, 85, 95) is an open planar loop (100) of circular radial section, the height of each hook measured perpendicularly from its anchorage to a surface of the functional part of the sole being between 0.75 and 2 mm and the diameter of the circular sections being between 0.2 and 0.75 mm.
5. Semelle orthopédique (21 , 41 , 51 , 61 , 71 , 81 , 91) selon l’une des revendications 1 à 4, qui comporte des crochets (100, 102, 104) s’étendant dans un plan (101 , 103, 105) et/ou des crochets (100, 102, 106, 108) présentant un plan de symétrie (101 , 103, 107, 109), ces plans des crochets faisant, avec une direction prédéterminée, un angle inférieur à 45 degrés. 5. orthopedic sole (21, 41, 51, 61, 71, 81, 91) according to one of claims 1 to 4, which comprises hooks (100, 102, 104) extending in a plane (101, 103 , 105) and/or hooks (100, 102, 106, 108) having a plane of symmetry (101, 103, 107, 109), these planes of the hooks making, with a predetermined direction, an angle less than 45 degrees.
6. Semelle (21 , 41 , 51 , 61 , 71 , 81 , 91) orthopédique selon l’une des revendications 1 à 5, dans laquelle les crochets (25, 45, 55, 65, 75, 85, 95) sont répartis en quinconce sur la surface de la partie fonctionnelle de la semelle et séparés par une distance constante comprise entre 1 mm et 3 mm. 6. Sole (21, 41, 51, 61, 71, 81, 91) orthopedic according to one of claims 1 to 5, wherein the hooks (25, 45, 55, 65, 75, 85, 95) are distributed staggered on the surface of the functional part of the sole and separated by a constant distance between 1 mm and 3 mm.
7. Procédé (100) d’impression d’une semelle orthopédique (21 , 22, 41 , 42, 51 , 61 , 71 , 81 , 91) par impression additive, caractérisé en ce qu’il comporte l’impression additive (114) 7. Process (100) for printing an orthopedic insole (21, 22, 41, 42, 51, 61, 71, 81, 91) by additive printing, characterized in that it comprises additive printing (114 )
- d’une partie fonctionnelle monobloc de la semelle orthopédique, et - a one-piece functional part of the orthopedic sole, and
- de champignons, crochets (25, 45, 55, 65, 75, 85, 95) ou boucles (26, 46, 56) d’une surface auto-agrippante sur au moins une partie de la surface de cette partie fonctionnelle. - Mushrooms, hooks (25, 45, 55, 65, 75, 85, 95) or loops (26, 46, 56) of a self-gripping surface on at least part of the surface of this functional part.
8. Procédé (100) selon la revendication 7, dans lequel, au cours de l’impression additive (114) de la semelle orthopédique (21 , 41 , 51 , 61 , 71 , 81 , 91), on imprime des crochets (25, 45, 55, 65, 75, 85, 95) s’étendant dans un plan (101 , 103, 105) ou présentant un plan de symétrie (101 , 103, 107, 109), ces plans des crochets faisant un angle inférieur à 45 degrés avec la direction d’impression, orthogonale du plan d’addition ou de solidification successive de matière. 8. Method (100) according to claim 7, wherein, during the additive printing (114) of the orthopedic sole (21, 41, 51, 61, 71, 81, 91), hooks (25 , 45, 55, 65, 75, 85, 95) extending in a plane (101, 103, 105) or having a plane of symmetry (101, 103, 107, 109), these planes of the hooks forming a lower angle at 45 degrees with the direction of printing, orthogonal to the plane of addition or successive solidification of material.
9. Procédé (100) selon l’une des revendications 7 ou 8, dans lequel, au cours de l’impression (114), on met en œuvre une poudre de matière thermoplastique, l’impression comportant, au moins, de chauffer cette poudre et d’effectuer un apport d'agent liquide. 9. Method (100) according to one of claims 7 or 8, wherein, during the printing (114), a powder of thermoplastic material is used, the printing comprising, at least, to heat this powder and to make a supply of liquid agent.
10. Procédé (100) selon l’une des revendications 7 à 9, dans lequel, au cours de l’impression (114), on met en œuvre un polymère thermoplastique de type polyamide. 10. Method (100) according to one of claims 7 to 9, wherein, during printing (114), a thermoplastic polymer of the polyamide type is used.
PCT/EP2023/053818 2022-02-15 2023-02-15 Orthopedic sole printed in three dimensions by additive manufacturing, having an adhesive closing surface, and method for producing same WO2023156492A1 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
FR2201339A FR3132661B1 (en) 2022-02-15 2022-02-15 OBJECT PRINTED BY ADDITIVE PRINTING IN THREE DIMENSIONS COMPRISING A SELF-GRIPING SURFACE, IN PARTICULAR AN ORTHOPEDIC SOLE, AND METHOD FOR MANUFACTURING IT
FRFR2201339 2022-02-15

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Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2014100462A1 (en) 2012-12-19 2014-06-26 New Balance Athletic Shoe, Inc. Customized footwear, and systems for designing and manufacturing same
CA3033732A1 (en) 2016-06-20 2017-12-28 Superfeet Worldwide, Inc. Methods of making an orthotic footbed assembly
US20180104922A1 (en) * 2015-04-21 2018-04-19 Covestro Deutschland Ag Method for producing 3d objects

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2014100462A1 (en) 2012-12-19 2014-06-26 New Balance Athletic Shoe, Inc. Customized footwear, and systems for designing and manufacturing same
US20180104922A1 (en) * 2015-04-21 2018-04-19 Covestro Deutschland Ag Method for producing 3d objects
CA3033732A1 (en) 2016-06-20 2017-12-28 Superfeet Worldwide, Inc. Methods of making an orthotic footbed assembly

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