FR2677232A1 - Method and mould for injecting (injection moulding) articles of footwear and articles thus obtained - Google Patents

Method and mould for injecting (injection moulding) articles of footwear and articles thus obtained Download PDF

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Publication number
FR2677232A1
FR2677232A1 FR9107033A FR9107033A FR2677232A1 FR 2677232 A1 FR2677232 A1 FR 2677232A1 FR 9107033 A FR9107033 A FR 9107033A FR 9107033 A FR9107033 A FR 9107033A FR 2677232 A1 FR2677232 A1 FR 2677232A1
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France
Prior art keywords
cleanliness
footwear
assembly
shape
mold
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Withdrawn
Application number
FR9107033A
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French (fr)
Inventor
Benard Jean-Leon
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Benard SA L
Original Assignee
Benard SA L
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Filing date
Publication date
Application filed by Benard SA L filed Critical Benard SA L
Priority to FR9107033A priority Critical patent/FR2677232A1/en
Publication of FR2677232A1 publication Critical patent/FR2677232A1/en
Withdrawn legal-status Critical Current

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Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29D—PRODUCING PARTICULAR ARTICLES FROM PLASTICS OR FROM SUBSTANCES IN A PLASTIC STATE
    • B29D35/00—Producing footwear
    • B29D35/06—Producing footwear having soles or heels formed and joined on to preformed uppers using a moulding technique, e.g. by injection moulding, pressing and vulcanising
    • B29D35/061—Producing footwear having soles or heels formed and joined on to preformed uppers using a moulding technique, e.g. by injection moulding, pressing and vulcanising by injection moulding
    • A—HUMAN NECESSITIES
    • A43—FOOTWEAR
    • A43B—CHARACTERISTIC FEATURES OF FOOTWEAR; PARTS OF FOOTWEAR
    • A43B13/00—Soles; Sole-and-heel integral units
    • A43B13/38—Built-in insoles joined to uppers during the manufacturing process, e.g. structural insoles; Insoles glued to shoes during the manufacturing process
    • A—HUMAN NECESSITIES
    • A43—FOOTWEAR
    • A43B—CHARACTERISTIC FEATURES OF FOOTWEAR; PARTS OF FOOTWEAR
    • A43B7/00—Footwear with health or hygienic arrangements
    • A43B7/14—Footwear with health or hygienic arrangements with foot-supporting parts
    • A43B7/1405—Footwear with health or hygienic arrangements with foot-supporting parts with pads or holes on one or more locations, or having an anatomical or curved form
    • A43B7/141—Footwear with health or hygienic arrangements with foot-supporting parts with pads or holes on one or more locations, or having an anatomical or curved form having an anatomical or curved form

Abstract

The invention relates to a method for the injection of articles of footwear with injected soles, particularly mules, with or without a compensated (built-up, wedge) heel, using a mould consisting of a form (shape), the lower base of which has cavities constituting the negative of the morphology of the foot and a sole slab including the injection impression (imprint), which method is characterised in that an insole is stuck on the base of the form, which insole is intended, under the pressure of the injected material, to come into close contact with the underside of the form, and in that a mounting (assembly) inner sole is fixed at a distance from the insole, which mounting inner sole is provided with openings allowing the injection material to flow into the chamber included between both the insole and the mounting inner sole.

Description

Procédé et moule pour l'iniection d'articles chaussants et articles ainsi obtenus
L'invention concerne un procédé et un moule destinés à l'injection de semelles d'articles chaussants, notamment de mules, à bout ouvert ou non, destinées en particulier aux professionnels exerçant une activité debout tels qu'infirmiers, infirmières, coiffeurs, enseignants, etc ...Method and mold for the injection of footwear and articles thus obtained
The invention relates to a method and a mold intended for the injection of soles of footwear, in particular mules, with open toe or not, intended in particular for professionals exercising a standing activity such as nurses, nurses, hairdressers, teachers. , etc ...

On sait que la station prolongée en position debout provoque, et les phlébologues ou podologues en conviennent, de graves perturbations physiologiques et morphologiques qui sont dûes le plus souvent à la qualité du chaussant des chaussures. We know that prolonged standing while standing causes, and phlebologists or podiatrists agree, serious physiological and morphological disturbances which are most often due to the quality of the footwear.

On a déjà proposé, pour remédier à cet inconvénient majeur, des dispositifs d'injection (voir le brevet 87 00 083/2 609 240 appartenant à la demanderesse) présentant l'originalité de ce que la forme, qui coopère avec l'empreinte du moule, présente sur sa face inférieure un profil correspondant au négatif de la morphologie du pied de manière à ce que la semelle obtenue par injection présente des cavités d'orteils et un bossage correspondant au soutien de la voûte plantaire. Certes ces dispositifs ont permis d'améliorer sensiblement le confort des articles chaussants, mais on peut encore accroître la qualité du chaussant des articles en mettant en contact avec le pied des matériaux nobles notamment en cuir ou encore en disposant sous une première de propreté un coussin compressible favorisant l'assise ou épousant les contorsions du pied. In order to remedy this major drawback, injection devices have already been proposed (see patent 87 00 083/2 609 240 belonging to the applicant) presenting the originality of the fact that the shape, which cooperates with the imprint of the mold, has on its underside a profile corresponding to the negative of the morphology of the foot so that the sole obtained by injection has toe cavities and a boss corresponding to the support of the arch. Admittedly, these devices have made it possible to significantly improve the comfort of footwear, but the quality of the footwear can be further improved by bringing noble materials, in particular leather, into contact with the foot, or by placing a cushion under a cleanliness first. compressible promoting the seat or following the contortions of the foot.

L'invention concerne donc un procédé pour l'injection d'articles chaussants à semelles injectées notamment de mules avec ou sans talon compensé, utilisant un moule constitué d'une forme dont la base inférieure présente des cavités constituant le négatif de la morphologie du pied et un pavé de semelle comportant l'empreinte d'injection, procédé caractérisé en ce que l'on affiche sur la base de la forme une première de propreté destinée à venir, sous la pression de la matière injectée, en contact étroit avec le dessous de la forme et que l'on fixe à distance de la première de propreté une première de montage pourvue d'ouvertures laissant fluer la matière d'injection dans la chambre comprise entre ces deux premières de propreté et de montage. The invention therefore relates to a method for injecting footwear with injected soles, in particular mules with or without a compensated heel, using a mold made up of a shape whose lower base has cavities constituting the negative of the morphology of the foot. and a sole block comprising the injection imprint, a method characterized in that on the basis of the shape is displayed a first cleanliness intended to come, under the pressure of the injected material, in close contact with the underside of the form and that is fixed at a distance from the first cleanliness a first assembly provided with openings allowing the injection material to flow into the chamber between these two first cleanliness and assembly.

Selon une caractéristique de l'invention, la base de la forme comporte une cuvette présentant à sa partie avant de légers bossages correspondant au dessin et au positionnement des orteils et, au niveau de la cambrure une cavité préfigurant la voûte plantaire, le fond de cette cuvette étant bordé par une lèvre périphérique contre laquelle vient se plaquer la première de propreté. According to a characteristic of the invention, the base of the form comprises a cup having at its front part slight bosses corresponding to the design and positioning of the toes and, at the level of the arch a cavity foreshadowing the arch of the foot, the bottom of this bowl being bordered by a peripheral lip against which is pressed the first cleanliness.

L'invention concerne également les articles chaussants réalisés à partir de ces procédé et moule caractérisés essentiellement en ce qu' ils comportent une première de montage ajourée maintenue à distance de la première de propreté et totalement noyée dans la matière injectée. The invention also relates to footwear produced from these process and mold, characterized essentially in that they comprise a perforated first fitting kept at a distance from the first of cleanliness and completely embedded in the injected material.

D'autres caractéristiques et avantages ressortiront de la description ci-après et des dessins annexés dans lesquels
La figure 1 est une vue en plan d'un article chaussant, sur forme, réalisé conformément à l'invention.Other characteristics and advantages will emerge from the description below and the appended drawings in which
Figure 1 is a plan view of an article of footwear, on form, produced according to the invention.

La figure 2 est une vue en plan de la première de montage ajourée. Figure 2 is a plan view of the first openwork mounting.

La figure 3 est une vue en coupe transversale, au niveau de l'arrière, du moule avant injection. Figure 3 is a cross-sectional view, at the rear, of the mold before injection.

La figure 4 est une vue en coupe transversale du moule, après injection.  Figure 4 is a cross-sectional view of the mold, after injection.

Le moule selon l'invention est constitué essentiellement d'une forme 1, généralement métallique, et d'un pavé de semelle comportant la cavité de moulage ou empreinte 3 dans laquelle sera injecté le compound constituant la semelle. La particularité de la forme est de présenter sous sa face inférieure une cuvette 4 dont la configuration est le négatif de la morphologie d'un pied. Cela suppose par conséquent que le fond de cette cuvette présente au niveau des orteils (comme visible en figure 1) des bossages 41 correspondant à la forme et au positionnement des orteils et, au niveau de la cambrure, une cavité 42 préfigurant la voûte plantaire de sorte que la matière qui viendra épouser ce profil ait, en positif, une configuration épousant au plus près la morphologie du pied. The mold according to the invention essentially consists of a shape 1, generally metallic, and a sole block comprising the molding cavity or imprint 3 into which the compound constituting the sole will be injected. The peculiarity of the shape is to present under its underside a bowl 4 whose configuration is the negative of the morphology of a foot. This therefore assumes that the bottom of this bowl has at the toes (as visible in Figure 1) bosses 41 corresponding to the shape and positioning of the toes and, at the arch, a cavity 42 prefiguring the arch of the foot. so that the material that will marry this profile has, in positive, a configuration closely matching the morphology of the foot.

Cette cuvette comme visible notamment en figures 3 et 4 se présente sous la forme d'un chambrage creusé dans la base de la forme et définissant une lèvre périphérique 5 correspondant à la hauteur de la cuvette, laquelle est destinée à recevoir une première de propreté 6 qui viendra se plaquer contre le fond de la cuvette et dont les extémités latérales rabattues 61, 62 viendront épouser les parois internes de la lèvre 5.  This bowl as visible in particular in Figures 3 and 4 is in the form of a recess hollowed out in the base of the form and defining a peripheral lip 5 corresponding to the height of the bowl, which is intended to receive a first cleanliness 6 which will be pressed against the bottom of the bowl and whose folded lateral ends 61, 62 will marry the internal walls of the lip 5.

Selon l'invention on affiche effectivement dans le fond de la cuvette 4 une première de propreté, pré-encollée qui sera, de préférence, à partir du moment où elle est en contact avec le pied, en cuir ou imitation. According to the invention, there is effectively displayed in the bottom of the bowl 4 a first cleanliness, pre-glued which will preferably be from the moment it is in contact with the foot, in leather or imitation.

Selon une caractéristique essentielle de l'invention, on habille ensuite la forme 1 d'une tige de cuir 7 (en l'espèce la tige d'une mule ajourée à l'avant et à l'arrière) cette tige de cuir ou en matière synthétique étant recousue sur une première de montage 8 présentant la particularité de comporter des ouvertures 9 comme visible en figure 2. La forme et le nombre de ces ouvertures ne sont pas déterminantes mais celles-ci doivent être avantageusement réparties sur la longueur de la première de montage de manière à ce que le compound sous pression puisse librement traverser la première de montage et s'engouffrer dans la chambre définie par la cuvette de la forme c'est-à-dire dans l'espace compris entre la première de propreté 6 et la première de montage 8.La première de propreté sera fortement appliquée sur le profil de la cuvette de la forme et viendra épouser son relief morphologique. According to an essential characteristic of the invention, the form 1 is then dressed with a leather rod 7 (in this case the rod of an openwork mule at the front and at the rear) this leather rod or in synthetic material being sewn onto a first assembly 8 having the particularity of having openings 9 as visible in FIG. 2. The shape and the number of these openings are not decisive but these must be advantageously distributed over the length of the first assembly so that the pressurized compound can freely pass through the first assembly and rush into the chamber defined by the bowl of the form, that is to say in the space between the first cleanliness 6 and the first assembly 8.The first cleanliness will be strongly applied to the profile of the bowl of the form and will match its morphological relief.

Pour alléger l'article chaussant et accroître son confort, on peut loger dans la partie talon un insert 10, évidé en tout ou partie, (figure 4) qui sera avantageusement positionné et maintenu en place pendant l'opération d'injection par des plots de centrage 1l ou mieux encore par une câle ou plaque 12 en matériau micro-cellulaire, celle-ci étant disposée sur la partie supérieure de l'insert et venant en contact avec la première de montage. To lighten the item of footwear and increase its comfort, an insert 10, completely or partially hollowed out, can be housed in the heel part (FIG. 4) which will advantageously be positioned and held in place during the injection operation by studs. centering 11 or better still by a shim or plate 12 of micro-cellular material, the latter being arranged on the upper part of the insert and coming into contact with the first assembly.

Le moule selon l'invention permet ainsi de réaliser des articles chaussants de grand confort dont le prix de revient est sensiblement réduit tout en améliorant le chaussant de l'article. En effet, la première de propreté en cuir ou matière similaire améliore le contact avec le pied tout en conservant le profil morphologique tel que décrit dans le brevet 87 00 083/2 609 240. En outre, l'insert 10 de même que la plaque micro-cellulaire de centrage permet là aussi d'améliorer l'assise du pied et d'épouser ses contorsions. Enfin, la première de montage étant noyée dans le compound, celle-ci pourra être dans une matière moins noble que la première de propreté par exemple en non-tissé ajouré. The mold according to the invention thus makes it possible to produce high comfort footwear whose cost price is significantly reduced while improving the footwear of the article. Indeed, the first of cleanliness in leather or similar material improves contact with the foot while retaining the morphological profile as described in patent 87 00 083/2 609 240. In addition, the insert 10 as well as the plate Microcellular centering also improves the base of the foot and matches its contortions. Finally, the first assembly being embedded in the compound, it may be made of a less noble material than the first of cleanliness, for example in openwork nonwoven.

L'article chaussant est ainsi réalisé en une seule opération d'injection permettant de noyer intégralement la première de montage dans le compound et d'assurer une fixation et un assemblage rigoureux de l'ensemble des composants.  The article of footwear is thus produced in a single injection operation making it possible to completely drown the first assembly in the compound and to ensure a rigorous fixing and assembly of all the components.

Claims (7)

REVENDICATIONS 1. Procédé pour l'injection d'articles chaussants à semelles injectées notamment de mules, avec ou sans talon compensé, utilisant un moule constitué d'une forme (1) dont la base inférieure présente des cavités (41 42) constituant le négatif de la morphologie du pied et un pavé de semelle (3) comportant l'empreinte d'injection, procédé caractérisé en ce que l'on affiche sur la base de la forme une première de propreté (6) destinée à venir, sous la pression de la matière injectée, en contact étroit avec le dessous de la forme et que l'on fixe à distance de la première de propreté une première de montage (8) pourvue d'ouvertures laissant fluer la matière d'injection dans la chambre comprise entre ces deux premières de propreté et de montage. 1. A method for injecting footwear with injected soles, in particular mules, with or without a compensated heel, using a mold made up of a shape (1) whose lower base has cavities (41 42) constituting the negative of the morphology of the foot and a sole block (3) comprising the injection imprint, a process characterized in that a cleanliness first (6) intended to come under pressure is displayed on the basis of the shape the injected material, in close contact with the underside of the form and which is fixed at a distance from the first cleanliness a first assembly (8) provided with openings allowing the injection material to flow into the chamber between these first two for cleanliness and assembly. 2. Moule pour la mise en oeuvre du procédé selon la revendication 1. caractérisé en ce que la base de la forme comporte une cuvette (4) présentant à sa partie avant de légers bossages (41)' correspondant au dessin et au positionnement des orteils et, au niveau de la cambrure, une cavité (42) préfigurant la voûte plantaire, le fond de cette forme étant bordé par une lèvre périphérique (5) contre laquelle vient se plaquer la premiere de montage (8) cousue à la tige (7). 2. Mold for implementing the method according to claim 1. characterized in that the base of the form comprises a bowl (4) having at its front part slight bosses (41) 'corresponding to the design and positioning of the toes and, at the level of the arch, a cavity (42) prefiguring the arch of the foot, the bottom of this shape being bordered by a peripheral lip (5) against which the first mounting plate (8) is pressed sewn to the rod (7 ). 3. Article chaussant réalisé à partir des procédé et moule conformes aux revendications 1 et 2 caractérisé en ce qu'il comporte une première de montage ajourée (8) maintenue à distance de la première de propreté (6) et totalement noyée dans la matière injectée. 3. Footwear made from the method and mold according to claims 1 and 2 characterized in that it comprises a perforated first fitting (8) kept at a distance from the first of cleanliness (6) and totally embedded in the injected material. . 4. Article chaussant selon la revendication 3 caractérisé en. ce qu'il comporte un insert (10) logé dans la partie arrière pour former un talon compensé, celui-ci pouvant pour des questions de légèreté être en tout ou partie évidé.  4. Footwear according to claim 3 characterized in. that it includes an insert (10) housed in the rear part to form a wedge heel, which may for reasons of lightness be wholly or partly hollowed out. 5. Article chaussant selon la revendication 4 caractérisé en ce que l'insert (10) est positionné dans l'empreinte du moule (2) par des plots de centrage (11) ou par une plaque en matériau micro-cellulaire (12) situé au-dessus de l'insert au contact de la première de montage (8). 5. Footwear according to claim 4 characterized in that the insert (10) is positioned in the mold cavity (2) by centering pads (11) or by a plate of micro-cellular material (12) located above the insert in contact with the first assembly (8). 6. Article chaussant selon les revendications 3. à 5. caractérisé en ce que la première de propreté est en cuir et est rabattue par ses extrémités latérales contre la lèvre (5) de la cuvette (4) de la forme. 6. Footwear according to claims 3 to 5. characterized in that the first of cleanliness is leather and is folded by its lateral ends against the lip (5) of the bowl (4) of the shape. 7. Article chaussant selon les revendications 3. à 6. caractérisé en ce que la première de montage est en tissu non-tissé et présente sur sa longueur une succession d'ouvertures (9) pour permettre le passage du compound depuis la cavité de moulage (3) dans la chambre située entre la première de propreté (6) et la première de montage (8).  7. Footwear according to claims 3 to 6. characterized in that the first assembly is made of non-woven fabric and has along its length a succession of openings (9) to allow the passage of the compound from the molding cavity (3) in the chamber located between the first cleanliness (6) and the first assembly (8).
FR9107033A 1991-06-10 1991-06-10 Method and mould for injecting (injection moulding) articles of footwear and articles thus obtained Withdrawn FR2677232A1 (en)

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FR9107033A FR2677232A1 (en) 1991-06-10 1991-06-10 Method and mould for injecting (injection moulding) articles of footwear and articles thus obtained

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Application Number Priority Date Filing Date Title
FR9107033A FR2677232A1 (en) 1991-06-10 1991-06-10 Method and mould for injecting (injection moulding) articles of footwear and articles thus obtained

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Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2755588A1 (en) * 1996-11-12 1998-05-15 Manuf Du Pontis Production of flexible shoe with injected PVC sole and injected strength insole

Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR946725A (en) * 1947-05-09 1949-06-13 Sole of a shoe
FR2011576A1 (en) * 1968-06-24 1970-03-06 Peter Funk Schuhfabrik
EP0161136A1 (en) * 1984-03-27 1985-11-13 Roger Ours Method for making a shoe, mould for carrying out this method and shoe made thereby
FR2576195A1 (en) * 1985-01-24 1986-07-25 Technisynthese Sarl Improvement to shoes with injection-moulded soles and method of manufacture therefor
FR2609240A1 (en) * 1987-01-07 1988-07-08 Benard Sa Manufacture Chaussur Device for injecting articles of footwear, particularly mules, and articles thus obtained

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR946725A (en) * 1947-05-09 1949-06-13 Sole of a shoe
FR2011576A1 (en) * 1968-06-24 1970-03-06 Peter Funk Schuhfabrik
EP0161136A1 (en) * 1984-03-27 1985-11-13 Roger Ours Method for making a shoe, mould for carrying out this method and shoe made thereby
FR2576195A1 (en) * 1985-01-24 1986-07-25 Technisynthese Sarl Improvement to shoes with injection-moulded soles and method of manufacture therefor
FR2609240A1 (en) * 1987-01-07 1988-07-08 Benard Sa Manufacture Chaussur Device for injecting articles of footwear, particularly mules, and articles thus obtained

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2755588A1 (en) * 1996-11-12 1998-05-15 Manuf Du Pontis Production of flexible shoe with injected PVC sole and injected strength insole

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