FR3002433A1 - Module for realization of orthopedic soles for patient, has lower layer whose surface is divided into elements, where one of elements is formed with material density and hardness based on therapeutic function of orthopedic element - Google Patents

Abstract

The module has a lower layer (B1) whose surface is divided into three elements (A1-A3), where the elements are designed with same or different thickness. The elements stay in contact with edges such that an upper surface has a surface smooth without perceptible edge. An upper coating layer is provided with a coating module, where contour of the elements materializes contour of an orthopedic element. One of the elements is formed with material density and hardness independent of density and hardness of the other elements based on therapeutic function of the orthopedic element. An independent claim is also included for a method for realization of a module.

Description

BACKGROUND OF THE INVENTION The present invention relates to a module for the production of thermoformed insoles comprising static correction elements, and the thermoformed insole 10 thus produced. PRIOR ART: Practitioners in podiatry currently have different types of modules, generally consisting of one or more layers of thermoformable materials arranged in different ways, cut according to a template adapted to the size of the patient, and intended to undergo a formatting by thermoforming. Said thermoforming can be carried out directly under the foot of the patient, the Poussou technique being one of the most representative of this type of process. A pocket made of a latex or silicone membrane contains a small glass ball type material. This pocket is connected to a vacuum pump. At first, the foot is applied to this device. In a second step, the skilled man evacuates, which causes a hardening of the material contained in the pocket. The upper face of the pouch retains the shape of the foot as long as the vacuum pump is running. In a third step, the thermoformable module, previously heated, is interposed between the foot and the upper face of the pocket. It keeps cooling a relief corresponding to that of the plantar surface of the foot. It is also possible to thermoform from a positive molding of the plantar surface of the foot in plaster or hard foam type polyurethane. The module, previously heated, is in this case maintained on the positive mold by a press consisting of a membrane system and vacuum pump. It retains after cooling the relief of the molding.

Once the thermoforming done, the practitioner has a thermoformed footprint that he will work in various ways to obtain the final sole. It may if necessary glue reinforcing layers and then proceed to shaping by sanding on a drum 5 provided with an abrasive sleeve. It has a wide range of materials, different densities, mechanical properties often very specific, including cushioning materials. In the end, the realization of a thermoformed sole is a very specific know-how, based on a good deal of knowledge acquired empirically and a certain manual skill, the experience gained being the basis of know-how. During shaping, so that the sole has a real therapeutic action, the practitioner will probably have to leave areas called extra thickness in certain parts of the sole, either to correct the position of the foot, or to discharge a pressure zone. Three categories of insoles can be schematically distinguished: 1. Supine insoles. They tend to place the foot in supination and are most often indicated for the correction of disorders related to a pronated attitude of the foot. They bring in particular the knee to the varum position by decompressing the outer compartment of the joint. These insoles have an extra thickness on the inner part, whose action will be equivalent to that of the following orthopedic elements: posterior supinator corner, support under scaphoid, arch support, supinator element anterior. 2. Pronating insoles. They tend to place the foot in pronation and are therefore most often indicated for the correction of disorders associated with a supine attitude of the foot. They bring the knee to the valgum position by decompressing the inner compartment of the joint. These insoles have an extra thickness on the outer part, whose action will be equivalent to that of the following orthopedic elements: posterior pronator corner, pronator band. 30 3. Neutral soles. They have no pronator or supinator effect. They will have a use in terms of rear foot stabilization, support distribution. They have an extra thickness on both the inner part and the outer part, their action can be approximated to that of the following orthopedic elements: heel ring, arcif elm discharge element.

Independently of these 3 types of correction, the operator will also frequently have to integrate at the level of the middle part (in the length direction) zones of extra thickness, the action of which will be equivalent to that of the orthopedic elements intended to to relieve, among other things, the pathologies of the forefoot (metatarsalgia): retrocapital support, retrocapital bar. PROBLEM OF RESINS The thermoformable modules available today are very often made of an assembly of thermoformable foams and also thermoformable resins. The main advantage of the use of the resins is their mechanical properties, mainly their rigidity which allows to give the sole a hull effect. The shaping of resins is unfortunately very delicate; in fact, their use has a double disadvantage: they have a tendency to melt under the effect of heat due to friction on the abrasive and to stick on the sanding tool, which renders it very quickly unusable in many cases. good conditions - during shaping if the sanding tool starts the resin reinforcement layer, an aesthetic effect of the more average ones is achieved. In the current state of the art, various methods that have been proposed do not remedy these drawbacks. Emmanuel Contai in Document No. 0900220 has described a multilayer complex comprising one or two rigid or semi-rigid shells. In terms of medium foot support, the effect obtained is very good, but on this type of product, during shaping, the abrasive tool will start the resin layer (s) with the two disadvantages described above. Some types of modules like the OPCT and SPCT of the company Podiatech include significant visible reinforcements resin thermocollante or fluent type. The aesthetic appearance after thermoforming is very good, but we face the same disadvantages if we must proceed to a shaping of the sole.

PROBLEM OF THICKNESS When the practitioner seeks to achieve a thermoformed therapeutic sole, he is led to leave areas of extra thickness in certain areas of the sole. As has been previously stated, it is most often a correction of the position of the hindfoot in pronation or supination, a posterior stabilizing bowl or a discharge of the forefoot. By working on a module designed from a flat base, it will most probably, 10 if it intends to include in the final sole correction elements, add material by gluing next to the zones of desired thicknesses between the thermoforming step and the shaping step. A simple solution would be to use a module of great thickness. The disadvantage would then be double: - the thermoforming operation over a large thickness of material requires a very long heating time, the control of the heating temperature is not good, with a risk of shrinkage of materials - L The shaping operation would then be long and difficult, in particular with a risk of deformation of the thermoformed imprint, the friction on the abrasive sleeve giving off heat and tending to soften the thermoformable materials. PROBLEM OF DENSITY The practitioner who works from modules to achieve a therapeutic sole is found in practice faced with a third difficulty: adapting the density and hardness of the various orthopedic elements of its sole to the role of said elements in the equipment. Consider the different elements of the foot of an orthopedic sole: FIG. 2: arcuate discharge element A1, FIG. 3: posterior pronator corner A1, FIG. 4: heel ring A1, FIG. 5 posterior supinator corner (here extended in support of FIG. vault) Al, fig 7: pronation band A1. The function of these rear foot elements is to force the positioning of the foot in pronation or supination or in neutral position. As such, these elements will preferably be made of materials selected from the most resistant, therefore the hardest and most dense, which will compact little in use and thus retain an effective correction over time. Let us now consider the elements of the forefoot: FIG. 3: retrocapital bar A2, FIG. 4: retrocapital support A2. These elements will be better tolerated if they are made of relatively soft materials, and therefore of lower density and hardness than that of the backfoot elements. In practice, medium density foams are suitable for these elements. The company Capron in the document No. 01 12615 has described a method of manufacturing a preformed module for thermoformed insole. This method consists in numerically modeling the volume of said module in order to obtain after thermoforming a sole adapted to the morphology of a foot and the internal volume of a shoe, and to manufacture in a thermoformable material said module. This module is not intended to be fashioned. There is also no question in this document differences in density between the different parts of the soles intended to materialize orthopedic elements of rear or forefoot, correctors or stabilizers. To date, there are no modules ready to thermoform with distinct elements embodying the active orthopedic elements of the final apparatus, of which: on the one hand, the hardness will be adapted to the role of said elements in the following apparatus it consists of rear foot elements, firmer, or forefoot, more flexible - on the other hand the thickness will be close to the final thickness of said elements so that it is not it is no longer necessary to add material by gluing before sanding, whether it be back or forefoot elements. The two aforementioned methods concerning the problem of resins, Mr Contai and the company Podiatech also did not provide a solution for this problem. Those skilled in the art have so far had to be content with these methods, which as we have seen have severe drawbacks.

Technical problem: The technical problem that arises is the following: to produce a thermoformable module, intended to be shaped after thermoforming, so that: - on the one hand, the inclusion of resin parts in said module is realized so as to constitute only a minor inconvenience for the operator during the shaping step. - On the other hand, the practitioner is not constrained, between the thermoforming step and that of sanding, to add material in order to be able to leave when sanding more or less marked areas of thickening corresponding to the orthopedic elements 10 of the back or forefoot of a therapeutic sole. - On the other hand, said areas of extra thickness corresponding to the active orthopedic elements is materialized by a visible element of density and hardness material appropriate to the orthopedic function of the element in question. - On the other hand the shaping stage allows the operator to quickly obtain a product of good aesthetic quality without altering the visible outline of the corrective elements. SUMMARY OF THE INVENTION The present invention relates to a module for producing orthopedic insoles 20 by thermoforming then manual shaping, comprising at least two layers of materials described below: - a lower layer (A) whose surface is divided into several elements, at least 3 elements (Al A2 A3), each of these elements having a thickness different from or equal to that of the other elements, the different elements being brought into contact at the level of the edge so that the upper face of the together has a generally smooth surface, no perceptible edge, the overall size being that of a sole ready to thermoform. an upper covering layer (C) characterized in that the contour of each of the different elements (Al A2 A3) of the lower layer 30 materializes the contour of an orthopedic element of the hind foot or forefoot, visible and clearly defined on the underside of the apparatus once completed, each of these elements being made from a material of density and hardness independent of the density and hardness of neighboring elements, appropriate to the therapeutic function of the corresponding orthopedic element, the thickness of each of the elements of the module before shaping being slightly greater and close to that of the thickness of the same element once the equipment is completed.

By the term "module", we denote throughout the application a unitary element consisting of the assembly of several layers of thermoformable materials PVA foam type, or the like or resin whose gauge is substantially similar to that of a sole podiatry intended to undergo a thermoforming operation and then a possible shaping to obtain an orthopedic insole.

General description of the invention: The invention is in the form of an assembly of several pieces of thermoformable materials, the overall size of the assembly is that of a sole ready to thermoform 15. It is adapted to the size of the apparatus that one wishes to achieve. The module thus constituted comprises 2 to 3 layers of materials: - lower layer (A) - middle layer, optional (B) - upper layer or coating layer (C) 20 1. The lower layer (A) comprises several planar pieces ( A1 A2 A3), juxtaposed in contact with each other at the level of singing. The contour of each piece of the lower layer corresponds to that of a final sole element and is thus visible on the underside of said sole. Each of these parts is made of thermoformable foam. Their thickness is variable, and will be between about 2 to 15 mm, depending on the corrections to make The hardness and thickness of each piece will not be the same depending on the desired effect. Pieces embodying a backfoot element, corrector or stabilizer, will be the hardest and therefore the densest. These rear foot pieces have an equivalent contour to that of rear foot elements conventionally used in podiatry: posterior supinator corner, posterior pronator corner, heel ring, arciform discharge element, pronator band. These pieces will also be the thickest. Thus, after thermoforming, a thermoformed impression is obtained comprising on its underside an extra thickness in the areas corresponding to said corrective elements. it is then no longer necessary to add material to the corrective areas envisaged between the thermoforming step and that of sanding. It will be up to the practitioner, during the shaping, to leave to these parts the thickness which it will judge useful.

The pieces materializing a midfoot element will generally consist of a foam less hard than that of the rear foot parts. Like the elements of conventional orthopedic insoles of forefoot, retrocapital support or retrocapital bar, their anterior contour will generally follow the rear part of the metatarsal heads. As for the rear foot parts, they will be made in a foam thicker than neighboring areas so that their thickness is close to that of the midfoot elements of the final apparatus. In the case of the element corresponding to the retrocapital support, the contour will be visible in its quasi completeness. In the case of the element corresponding to the retrocapital bar, the anterior limit will also be almost completely visible while its posterior limit will merge with the anterior limit of the posterior element. As for the posterior parts it will be up to the practitioner, during the shaping, to leave to these parts the thickness which it will judge useful. Finally the pieces materializing the anterior part of the sole, completing the front part of the template, will be the most flexible. The lower layer (A) consists of several planar pieces (juxtaposed in contact with each other at the edge, each active element of the final sole appears visually on the lower face of the module .The boundary between the elements constituted by the different parts of the lower layer will maintain a clean and precise appearance even after thermoforming and sanding 2. The second layer (B), medium layer, is optional and includes a piece of thermoformable resin or material of rigidity and hardness equivalent to a thickness of approximately 1 to 2 mm, its contour will be substantially the same as that of the corrective parts or stabilizers of the lower back of the bottom layer.The essential function of this part will be to reinforce the effect of the corrective or rear stabilizers placed in the lower layer by adding additional rigidity. e that the material of the lower layer constituting the backfoot element has sufficient rigidity, the addition of the middle layer will not be necessary. If we consider the profile of a completed orthopedic insole, it appears that the contour of the rear foot elements correspond to areas of the module which are intended to retain the thickness after shaping. The resin part being placed at the upper face of the rear foot element and having the same contour, it is fully integrated in the thickness of the sole. The shaping being done from below, in a generally horizontal plane, there is little chance that the abrasive tool reaches the resin element. This minimizes the disadvantages due to the inclusion of resin parts in the module. In the initial version of the present invention, the upper face of the lower layer of the module before thermoforming constitutes a flat surface, the contour of the resin reinforcement piece, placed on this surface, will constitute a perceptible edge to the touch on the top of the 10 module. In a variant of the invention, the resin part may be integrated into the lower layer of the module. In this case, the corrective parts or stabilizers of the lower foot of the lower layer will be shifted downwards when assembling the module with a height corresponding to the thickness of the resin part, so that no protruding edge is not perceptible to the upper face of the module. The thickness of each element (A1, A2, A3) of the lower layer (A) of the module, independent of the thickness of the neighboring elements, is approximately constant, each of the elements then having an approximately rectangular cross-section. The thickness of the elements (A1, A2, A3) of the lower layer (A) of the module is variable so that the height of each of the elements, around the zone of contact with the neighboring elements is close to the the height of the song materializing the contact between the two elements. Optionally the middle layer of the soleplate may also include a piece of a thickness of about 2 mm, specifically damping material of ovoid shape most of the time, intended to be placed in the center of the heel, more particularly when the middle layer of the module will be assembled according to the initial version of the invention, that is to say when the outline of the resin part will be perceptible to the upper face of the sole. 3. The upper layer (C) is constituted by the coating of the module. It may be a thermoformable foam such as those that are usually used for orthopedic insoles, type 2mm EVA foam medium density. In the initial version of the present invention, in the case where the edge of the resin part of the middle layer is perceptible to the touch, this coating foam will be compressed opposite the edge formed by the contour of the piece. resin when the sole has been worn for some time and attenuate the edge of said contour. The coating layer may also be constituted by various synthetic materials of small thickness conventionally used in chiropody. All of these 3 layers of materials (A, B, C), bonded together, constitute a complete module, ready for thermoforming and comprising in advance corrective zones, hardness and thickness adapted to the function of each element of the sole, in the back foot as in the forefoot, according to the equipment plan desired by the practitioner. presentation of the various figures Figure 1 Global view of the invention. The module presented in this figure is a neutral sole without pronator or supinator effect. It has 3 layers of materials. The lower layer has 3 elements (A, B, C): Al: the thickest part, materializing a stabilizing rear heel ring, made of rigid foam A2: mid-foot piece, of intermediate rigidity A3: piece of The most flexible layer The middle layer has 2 elements: 25 B1: piece of thermoformable resin or equivalent material, reinforcing the piece Al B2: ovoid lozenge, damping material The upper layer comprises 1 element: Cl: coating of the module 30 Figures 2 to 7: presentation of different possible arrangements of the lower layer of a module, seen from below, materializing different orthopedic elements used in podiatry. Non-exhaustive list. Figure 2: Al: posterior element type arciform element of discharge A2: midfoot element, anterior contour in retrocapital bar A3: forefoot element Figure 3: Al: posterior element type posterior pronator corner A2: medial element foot, anterior contour in retrocapital bar A3: forefoot element Figure 4: Al: posterior element type posterior talar ring A2: midfoot element type medial retrocapital support, made of flexible foam thicker than the element A3 A3: forefoot element. In this case, the forefoot element has a greater rigidity than the midfoot element A2, it will also be thinner. Thus arranged, the module makes it possible to produce a relief corresponding to a retrocapital support conventionally used in podiatry, in terms of thickness and rigidity.

Figure 5: Al: posterior element materializing a posterior supinator corner prolonged in front by a support of arch. A supine base A2: midfoot element, anterior contour in retrocapital bar A3: forefoot element Figure 6: variant of the invention in which the lower layer has no delimitation at the midfoot. The lower layer then has only two pieces: A1: posterior element materializing a posterior supinator corner extended forward by a plantar arch support A2: lower layer piece; element of medio foot and forefoot integrated in one and the same piece completing the jig of the sole Figure 7: as in the previous figure, variant of the invention in which the lower layer has no delimitation at the midfoot : Al: posterior element materializing a total pronoun band A2: piece completing the template Figure 8: exploded profile view of a module (external edge of the module shown in Figure 3, left foot, for example). The model presented here corresponds to the variant of the invention in which the intermediate layer resin part is placed on the lower layer. The outline of said resin part is perceptible to the touch on the upper face of the module: A1: posterior element of the lower layer A2: medial-foot element of the lower layer A3: forefoot element of the lower layer Bi: element in resin of the middle layer, reinforcing the element Al C1: coating layer Figure 9: exploded profile view of a module (external edge of the module shown in Figure 3, left foot, p ex). The model presented here corresponds to the variant of the invention in which the intermediate layer resin part is integrated into the thickness of the lower layer. No protruding edge is noticeable to the touch on the upper face of the module: A1: posterior element of the lower layer A2: medial foot element of the lower layer A3: forefoot element of the lower layer B1: resin element of the middle layer, reinforcing the element Al C1: coating layer Figure 10 to 12: view of the module shown in Figure 3, section H-H '. 10: sectional view of the module before thermoforming A1: posterior element of the lower layer, materializing in this example a posterior pronator corner. The dotted bevel shows the variant of the invention in which the lower layer pieces are bevelled.

A2: mid-foot element of the lower layer Bi: middle-layer resin element, reinforcing the AlCl element: coating layer Figure 11: cross-sectional view of the previous module, once the thermoforming step is completed, before shaping. Same elements as the previous module.

Figure 12: sectional view of the same module as in the two previous figures, once performed the shaping step. Sole finished. Same elements as the previous module. DETAILED DESCRIPTION OF AT LEAST ONE EMBODIMENT OF THE INVENTION The embodiment of the invention, with reference to the various figures, comprises the various steps described below. The example treated will be that of a sole having a posterior pronator element and at the mid-foot a retrocapital support, according to the initial version of the invention, the contour of the resin reinforcement of the middle layer constituting a perceptible relief. The first step is to cut the various elements (A, B, C) of the module according to various methods: cutting with the blade, laser, jet of water or other. The elements of the lower layer (A) are thus cut out: the rearfoot corrector element, that is to say in this case the posterior pronator corner, which will be of a thickness greater than the other elements. high density foam; Approximately 12 to 15 mm, then the mid-foot element of contour type support retrocapital foam medium density, sufficient thickness to form an effective element: 9 to 10 mm, finally the element completing the remaining surface of the module, foam of average or even lower density and of lower thickness than that of the previous element. The resin reinforcement constituting the middle layer (B) is then cut, with a contour substantially similar to the corrector element of the rear foot. The upper coating layer (C) may be cut in advance or once applied to the module.

The second step is to assemble the various parts by gluing with a contact type glue. An adhesive resistant to a temperature of the order of a hundred degrees is used, the thermoforming temperatures of the materials used being in the range of 70 to 90 °. Thus the different parts of the module will not dissociate at the heater.

The different elements (A1, A2, A3) of the lower layer (A) are first assembled, the contact being made at the edge of each piece and so that the upper face of the layer thus formed is flat. and does not have a noticeable irregularity to the touch. The resin reinforcement of the middle layer (B) is then applied, if such a middle layer is used. The coating layer (C) is then applied and a cutting is carried out according to the general gauge of the module. The periphery of the entire module is then folded to approximate the interior volume of most shoe designs after thermoforming. The third step is heating the module followed by thermoforming. The most suitable method is the thermoforming on plaster type positive molding by pressing on the molding. In the case of the inclusion of a forefoot element, of the type of the retrocapital support, it will be preferable to modify the plaster mold by digging by any means a small depression opposite the location of the element or better having previously included a foam back support during the casting of the mold and removing the foam element before pressing so as to also obtain a depression opposite the location of the element.

Other thermoforming methods are also usable but are not within the scope of this description. The fourth step is shaping. The operator will remove superfluous thicknesses from below the module respecting a relatively flat sanding surface. In the case of a stabilizer sole, this step consists in removing material on the underside of the module in an approximately horizontal plane. In the case of a module having a rear foot lateral correction, it will ensure to adapt the orientation of the sanding plan according to the desired effect. It will also ensure that there is sufficient thickness next to the forefoot element. Except clumsiness of the operator the sanding plane does not reach the limit between the lower layer of the module and the two other layers. The resin reinforcement of the middle layer therefore has no reason to be exposed. The invention makes it possible to shorten the shaping step but does not aim to eliminate it. It is up to the operator to leave the sanding sufficient thickness in predefined places to give the equipment thus achieved its therapeutic effectiveness. It is possible to produce different models of modules according to this method, the elements included in the finished orthopedic insole corresponding to those conventionally used in chiropody. A non-exhaustive list of these elements has been presented in the previous section. The present invention is intended for the realization of orthopedic insoles with a proven therapeutic action. It is also possible to achieve according to this method soles of comfort. The invention also covers all the embodiments and all the applications which will be directly accessible to the person skilled in the art upon reading the present application, and of his own knowledge. It is in particular possible to provide to add several elements (A4, A5, etc.) constituting a lower layer (A) according to the wishes of the skilled person. The same applies for the other layers (B, and C).

Claims (10)

REVENDICATIONS1. Module for producing orthopedic insoles by thermoforming then manual shaping, characterized in that it comprises at least 2 layers of materials described below: - a lower layer (A) whose surface is divided into several elements, at least 3 elements (A1 A2 A3), each of these elements having a thickness different from or equal to that of the other elements, the different elements being brought into contact at the edge so that the upper face of the assembly has a generally smooth surface , without perceptible edge, the overall size being that of a sole ready to thermoform. - an upper layer of coating (C) and characterized in that the contour of each of the different elements of the lower layer (A) materializes the contour of an orthopedic element of hind foot or forefoot, visible and clearly defined on the underside of the apparatus once complete, each of these elements being made from a material of density and hardness independent of the density and hardness of neighboring elements, appropriate to the therapeutic function of the element orthopedic corresponding, the thickness of each of the elements of the module before shaping being slightly greater and close to that of the thickness of the same element once the equipment is completed. 2. Module according to claim 1, characterized in that the elements (A1 A2 A3) of the lower layer (A) of the module intended to be positioned under the back of the foot after the apparatus is completed are those which have the hardness and rigidity the most important. 3. Module according to claim 1 or 2, characterized in that the elements (A1 A2 A3) of the lower layer (A) of the module intended to be positioned at the midfoot 30 have a hardness lower than that of the elements of back foot. 4. Module according to any one of claims 1 to 3, characterized in that is added between the lower layer (A) of materials and the upper layer (C), an intermediate layer (B) consisting of a reinforcement made of thermoformable and rigid material whose contour is substantially the same as that of one of the elements (Al A2 A3) of the lower layer (A), said lower layer element being one of those positioned at the rear part of the module and whose density is the highest relative to the neighboring elements, so that the intermediate layer element enhances the rigidity and hardness of the underlying element, the contour of the intermediate layer element constituting an edge noticeable to the touch. 5. Module according to any one of claims 1 to 4, characterized in that the elements of the lower layer (A) placed opposite the reinforcement rigid intermediate layer material (B) are shifted downwards during the assembly of the module with a height corresponding to the thickness of the reinforcement of rigid material, so that no protruding edge is noticeable to the touch at the upper face of the module. 6. Module according to any one of claims 1 to 5, characterized in that the thickness of each element (Al, A2, A3) of the lower layer (A) of the module, independent of the thickness of the adjacent elements. , is approximately constant, each of the elements then has an approximately rectangular section. 7. Module according to any one of claims 1 to 6, characterized in that the thickness 20 of the elements (A1, A2, A3) of the lower layer (A) of the module is variable so that the height of each elements, around the contact zone with the neighboring elements is close to the height of the song materializing the contact between the two elements. 8. Module according to any one of claims 1 to 7, characterized in that the thickness 25 of each of the layers (A, B, C) will be between about 2 to 15 mm. 9. A method of producing a module as described in claims 1 to 8 characterized in that it comprises: a first step of cutting the various elements of the module (A, B, C) according to various methods: cutting with a blade, laser, water jet or other; - The second step is to assemble the different parts (A, B, C) by gluing with a contact type glue: - using a glue resistant to a temperature of about a hundred degrees (the thermoforming temperatures of the materials used are in a range of 70 to 90 °), - we assemble in a first stage the various elements of the lower layer (A1, A2, A3), the contact being made at the level of the song of each piece and so that the upper face of the layer thus formed is flat and has no perceptible irregularity to the touch, - the resin reinforcement of the middle layer (B) is then applied, if such a middle layer is used - The coating layer (C) is then applied and a cutting is carried out according to the general gauge of the module, - the periphery of the entire module is then folded so as to marry approximately the internal volume of the pl topart shoe models after thermoforming; the third step is that of heating the module followed by thermoforming: the most suitable method being the thermoforming on positive molding plaster type by pressing on the molding; - The fourth step is that of shaping: the operator will remove superfluous thicknesses from below the module respecting a relatively flat sanding surface. 10. The method of claim 9, characterized in that to perform the first step, is carried out the cutting of the elements of the lower layer (A): the rearfoot correction element, that is to say in this case the posterior pronator corner, which will be of a greater thickness than the other elements, of high density foam; Approximately 12 to 15 mm, then the mid-foot element of contour type support retrocapital foam medium density, sufficient thickness to form an effective element: 9 to 10 mm, finally the element completing the remaining surface module, foam of average density or lower and lower thickness than that of the previous element; and characterized in that is then cut the resin reinforcement constituting the middle layer, 30 contour substantially similar to the correction element rear foot.