FR2661322A1 - Rigid non-slip sole, method and mould for manufacturing it - Google Patents

Rigid non-slip sole, method and mould for manufacturing it Download PDF

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Publication number
FR2661322A1
FR2661322A1 FR9005333A FR9005333A FR2661322A1 FR 2661322 A1 FR2661322 A1 FR 2661322A1 FR 9005333 A FR9005333 A FR 9005333A FR 9005333 A FR9005333 A FR 9005333A FR 2661322 A1 FR2661322 A1 FR 2661322A1
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FR
France
Prior art keywords
insert
sole
polyvinyl chloride
imprint
shape
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Withdrawn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
FR9005333A
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French (fr)
Inventor
Bonnet Jean-Claude
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.)
MECA TENO SA
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MECA TENO SA
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by MECA TENO SA filed Critical MECA TENO SA
Priority to FR9005333A priority Critical patent/FR2661322A1/en
Publication of FR2661322A1 publication Critical patent/FR2661322A1/en
Withdrawn legal-status Critical Current

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Classifications

    • BPERFORMING OPERATIONS; TRANSPORTING
    • B29WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29DPRODUCING PARTICULAR ARTICLES FROM PLASTICS OR FROM SUBSTANCES IN A PLASTIC STATE
    • B29D35/00Producing footwear
    • B29D35/06Producing footwear having soles or heels formed and joined on to preformed uppers using a moulding technique, e.g. by injection moulding, pressing and vulcanising
    • B29D35/061Producing 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
    • AHUMAN NECESSITIES
    • A43FOOTWEAR
    • A43BCHARACTERISTIC FEATURES OF FOOTWEAR; PARTS OF FOOTWEAR
    • A43B13/00Soles; Sole-and-heel integral units
    • A43B13/14Soles; Sole-and-heel integral units characterised by the constructive form
    • A43B13/22Soles made slip-preventing or wear-resisting, e.g. by impregnation or spreading a wear-resisting layer
    • A43B13/24Soles made slip-preventing or wear-resisting, e.g. by impregnation or spreading a wear-resisting layer by use of insertions

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Footwear And Its Accessory, Manufacturing Method And Apparatuses (AREA)
  • Injection Moulding Of Plastics Or The Like (AREA)

Abstract

The invention relates to a rigid sole made from polyvinyl chloride (PVC) of the type comprising a sole body (1) equipped with at least one insert (2, 3) in contact with the ground and forming wear surface. The sole according to the invention is characterised in that the inserts (2, 3) are made from a polyvinyl chloride having a hardness which is lower than that of the polyvinyl chloride of the body of the sole (1). Application to shoes.

Description

Semelle rigide antidérapante procédé et moule pour sa fabrication.Rigid non-slip sole process and mold for its manufacture.

L'invention concerne une semelle rigide en polychlorure de vinyle (PVC) du type comprenant un corps de semelle muni d'au moins un insert en contact avec le sol et formant surface d'usure.The invention relates to a rigid polyvinyl chloride (PVC) sole of the type comprising a sole body provided with at least one insert in contact with the ground and forming a wear surface.

On entend par "rigide" une semelle ayant une durete shore relative élevée, comprise entre 75 et 85. De telles semelles peuvent être fabriquées séparément et assemblées ultérieurement sur des tiges de chaussures. Il est également connu de fabriquer la semelle et de l'assembler à une tige au cours d'une même opération d'injection.The term "rigid" is intended to mean a sole having a high relative shore hardness of between 75 and 85. Such soles can be manufactured separately and subsequently assembled on shoe uppers. It is also known to manufacture the sole and assemble it to a rod during the same injection operation.

Les semelles en polychlorure de vinyle offrent de nombreux avantages. Leur rigidité convient à la fabrication de chaussures traditionnelles, par opposition à des articles chaussants à semelles souples tels que des pantoufles ou similaires et -leur usure est lente, ce qui donne une grande solidité à la chaussure. En outre, une t#'#1e semelle peut etre colorée dans la masse et peinte, ce qui permet de lui donner toute esthétique voulue, par exemple l'apparence du cuir naturel. Les inserts que comportent certaines semelles connues sont réalisés dans la même matière que le corps de la semelle, mais avec des colorations et peintures différentes, de façon à donner un aspect de bombout de talon ou de patin de se nielle, avec une coloration noire imitant le caoutchouc ou une coloration imitant un cuir différent.Polyvinyl chloride soles offer many advantages. Their rigidity is suitable for the manufacture of traditional shoes, as opposed to footwear with flexible soles such as slippers or the like and their wear is slow, which gives great strength to the shoe. In addition, a t # '# 1e sole can be colored in the mass and painted, which makes it possible to give it any desired aesthetic, for example the appearance of natural leather. The inserts that some known soles have are made of the same material as the body of the sole, but with different colors and paints, so as to give the appearance of a heel bomb or a snow shoe, with a black color imitating rubber or a color imitating a different leather.

Ces semelles avec inserts connues sont fabriquées de manière traditionnelle. Les inserts sont fabriqués séparément, stockés puis placés dans le moule d'injection de la semelle. Un tel procédé est long et onéreux et conduit en outre à des défauts d'aspect du fait de l'insuffisance de stabilisation de l'insert.These soles with known inserts are made in the traditional way. The inserts are produced separately, stored and then placed in the sole injection mold. Such a process is long and expensive and also leads to appearance defects due to the insufficient stabilization of the insert.

Les semelles connues en polychlorure de vinyle offrent l'inconvénient majeur d'être glissantes, meme en donnant à la surface en contact avec le sol des profils supposés antidérapants.The known polyvinyl chloride soles offer the major drawback of being slippery, even by giving the surface in contact with the ground profiles that are supposed to be non-slip.

La présente invention vise en conséquence à fournir une nouvelle semelle rigide en polychlorure de vinyle présentant les qualités mécaniques et esthétiques des semelles connues de ce type, mais qui présente un coefficient de frottement élevé, ce qui la rend non glissante.The present invention therefore aims to provide a new rigid polyvinyl chloride sole having the mechanical and aesthetic qualities of known soles of this type, but which has a high coefficient of friction, which makes it non-slippery.

A cet effet, la semelle selon l'invention est caractérisée en ce que les diserts sont en un polychlorure de vinyle de dureté moins élevée que celle du polychlorure de vinyle du corps de la semelle.To this end, the sole according to the invention is characterized in that the diserts are made of a polyvinyl chloride of lower hardness than that of the polyvinyl chloride of the body of the sole.

Les inserts, formant des patins de semelle ou des bombouts de talon, sont ainsi beaucoup moins glissants que le reste de la semelle, sans que la tenue mécanique et, en particulier, la rigidité de la semelle soient affectées. La nature commune du corps de se nielle et de insert assure une excellente liaison par in-erfusion de matière.The inserts, forming sole pads or heel bombs, are thus much less slippery than the rest of the sole, without the mechanical strength and, in particular, the rigidity of the sole being affected. The common nature of the niel and insert body ensures excellent bonding by material infusion.

De préférence, le corps de semelle a une dureté shore comprie antre 75 et 85 et l'insert a une dureté shore comprise entre 50 et t. Preferably, the sole body has a shore hardness between 75 and 85 and the insert has a shore hardness between 50 and t.

Afin d'améliorer la liaison du cors de semelle et de l'insert, on peut prévoir 1' insert con porte des nervures d'assen- blage çer fusion avec le corps de semelle. Ces nervures permettent un assemblage par fusion sûr et contrôlé de la matière de l'insert en contact avec le corps de semelle. Lesdites rainures peuvent être parallèles ou croisées.In order to improve the connection of the sole horn and the insert, provision may be made for the insert to carry assembly ribs to be fused with the sole body. These ribs allow a secure and controlled fusion assembly of the material of the insert in contact with the sole body. Said grooves can be parallel or crossed.

L'invention a encore pour objet un procédé de fabrication de la semelle précédente, caractérisé en ce qu'on injecte simultanément dans au moins deux empreintes d'un même moule, au moyen de deux vis d'injection distinctes, deux polychlorures de vinyle de duretés différentes, une première empreinte ayant la forme et les di tensions d'un insert avant retrait, la seconde empreinte ayant la forme et les dimensions de la'semelle et comportant une cavité ayant la forme et les dimensions dudit insert après retrait, un insert provenant de l'opération d'injection précédente étant placé dans ladite cavité avant l'injection. On peut ainsi, à chaque passe d'injection, fabriquer au moins une semelle complète et les inserts destinés à la passe d'injection suivante.Avant de procéder à la nouvelle injection, ces inserts sont placés dans les cavités correspondantes du noyau de semelle. Bien entendu, pour le premier cycle d'injection, seule l'alimentation des empreintes d'inserts est assurée. Un tel procédé assure en outre une sta bilication optimale de l'insert et évite toute déformation après injection, en particulier lorsque les inserts comportent des striures superficielles contre le classement Bien entendu, ces striures doivent être positionnées avec précision dans la cavité correspondante avant l'injection suivante, ce qui est facilité par la confcrmité dinensionnelle de l'insert qui vient d'être moulé et de la cavité.The invention also relates to a method of manufacturing the previous sole, characterized in that simultaneously injected into at least two impressions of the same mold, by means of two separate injection screws, two polyvinyl chloride different hardnesses, a first impression having the shape and the tensions of an insert before removal, the second impression having the shape and dimensions of the sole and comprising a cavity having the shape and dimensions of said insert after removal, an insert from the previous injection operation being placed in said cavity before injection. It is thus possible, at each injection pass, to manufacture at least one complete sole and the inserts intended for the next injection pass. Before proceeding to the new injection, these inserts are placed in the corresponding cavities of the sole core. Of course, for the first injection cycle, only the feeding of the insert impressions is ensured. Such a method also ensures optimum stabilization of the insert and avoids any deformation after injection, in particular when the inserts have superficial striations against classification. Of course, these striations must be positioned precisely in the corresponding cavity before subsequent injection, which is facilitated by the dimensional consistency of the insert which has just been molded and of the cavity.

De préférence, les inserts com#ortent, sur leur face venant en contact avec le corps de semelle des nervures d'assemblage par fus on parallèles ou croisees pour former un quadrillage.Preferably, the inserts com # ortent, on their face coming into contact with the sole body of the assembly ribs by fus on parallel or crossed to form a grid.

L'invention concerne également un moule pour la rise en oeuvre du procédé précédent, caractérisé en ce qu'il comprend au moins une empreinte de corps de semelle et ne empreinte d'Insert, l'empreinte de corps de semelle comportant au mois une cavité d'insert dcnt la forme et les dimensions correspondent à celles de l'insert aprés retrait, la forme et la dimension de l'empre'nte d'insert correspondant à celles de l'insert avant retrait, e des canaux d'injection sépares pour chaque noyau. The invention also relates to a mold for carrying out the above method, characterized in that it comprises at least one imprint of the sole body and no imprint of an insert, the imprint of the sole body comprising at least one cavity. insert the shape and dimensions correspond to those of the insert after removal, the shape and size of the insert impression correspond to those of the insert before removal, and separate injection channels for each nucleus.

L'invention sera bien comprise à la lecture de la description suivante faite en se référant au dessin annexé dans lequel
La figure 1 est une vue en plan d'une semelle selon
un exemple de réalisation de l'invention; la figure
2 est une vue en plan d'une moitié du moule; la fi
gure 3 est une vue en plan de l'autre moitié du
moule; la figure 4 est une vue en coupe partielle
d'une portion de la moitié de moule de la figure 2;
la figure 5 est une vue partielle en coupe selon la
ligne B de la figure 3, et la figure 6 est une vue
partielle en coupe selon la ligne C de la figure 3.
The invention will be clearly understood on reading the following description made with reference to the appended drawing in which
Figure 1 is a plan view of a sole according to
an exemplary embodiment of the invention; the figure
2 is a plan view of one half of the mold; the fi
gure 3 is a plan view of the other half of the
mold; Figure 4 is a partial sectional view
a portion of the half of mold of Figure 2;
Figure 5 is a partial sectional view along the
line B of Figure 3, and Figure 6 is a view
partial section along line C in Figure 3.

La semelle représentée à la figure 1 comprend un corps 1, un insert 2 formant patin de semelle et un insert 3 formant bombout de talon. Conformément à l'invention, le corps 1 est en polychlorure de vinyle de dureté élevée, de préférence de dureté shore comprise entre 75 et 85, alors que les inserts 2 et 3 sont en polychlorure de vinyle de dureté plus faible, de préférence de dureté shore comprise entre 60 et 65. Les inserts 2 et 3 sont avantageusement munis de striures superficielles qui augmentent le coefficient de frottement.The sole shown in FIG. 1 comprises a body 1, an insert 2 forming the sole pad and an insert 3 forming a heel bomb. According to the invention, the body 1 is made of polyvinyl chloride of high hardness, preferably of shore hardness between 75 and 85, while the inserts 2 and 3 are made of polyvinyl chloride of lower hardness, preferably of hardness shore between 60 and 65. Inserts 2 and 3 are advantageously provided with surface ridges which increase the coefficient of friction.

La semelle est fabriquée dans un moule représenté à titre d'exemple aux figures 2 à 6. The sole is produced in a mold shown by way of example in FIGS. 2 to 6.

La moitié de moule M ou fond de moule représentée à la figure 2 est fermée par la moitié de moule M' ou couvercle représentée à la figure 3. Le fond de moule M comporte des empreintes 12,13 correspondant aux corps de deux semelles d'une paire, avec chacune une cavité de logement 14 pour un insert de patin et une cavité de logement 15 d'un insert de bombout de talon. Le fond de moule M comprend en outre les empreintes 16,17 correspondant aux patins de semelle et les empreintes 18,19 correspondant aux bombouts de talon. Comme symbolisé au dessin, les cavités 14,15 et les empreintes 16,17,18,19 sont munies de striures tel qu'indiqué à la figure 4. The mold half M or mold base shown in Figure 2 is closed by the mold half M 'or cover shown in Figure 3. The mold base M has indentations 12,13 corresponding to the bodies of two soles of a pair, each with a housing cavity 14 for a shoe insert and a housing cavity 15 for a heel bomb insert. The mold base M further comprises the imprints 16,17 corresponding to the sole pads and the imprints 18,19 corresponding to the heel bombs. As symbolized in the drawing, the cavities 14,15 and the indentations 16,17,18,19 are provided with ridges as shown in Figure 4.

Le couvercle de moule M' comprend deux noyaux 4, 5 (figure 3) correspondant au corps de semelle qui sont alimentés par un canal d'injection 6 provenant d'une première vis d'injection (non représentée). Le couvercle comprend en outre deux noyaux 7, 8 correspondant aux patins et deux noyaux 9, 10 correspondant aux bombouts de talon, les noyaux 7, 8, 9, 10 étant alimentés par un second canal d'injection 11 provenant d'une seconde vis d'injection (non représentée). Comme représenté aux figures 5 et 6, les noyaux 7, 8 et les noyaux 9, 10 présentent respectivement des quadrillages à sections triangulaires formant un réseau de rainures, lesquelles formeront des nervures d'assemblage par fusion dans la pièce injecté
Les dimensions et formes des noyaux 7, 8, 9, 10 fermant les empreintes 17, 16, 19, 18 correspondent aux inserts avant retrait.
The mold cover M ′ comprises two cores 4, 5 (FIG. 3) corresponding to the sole body which are supplied by an injection channel 6 coming from a first injection screw (not shown). The cover further comprises two cores 7, 8 corresponding to the pads and two cores 9, 10 corresponding to the heel bombs, the cores 7, 8, 9, 10 being supplied by a second injection channel 11 coming from a second screw injection (not shown). As shown in FIGS. 5 and 6, the cores 7, 8 and the cores 9, 10 respectively have grids with triangular sections forming a network of grooves, which will form assembly ribs by fusion in the injected part
The dimensions and shapes of the cores 7, 8, 9, 10 closing the cavities 17, 16, 19, 18 correspond to the inserts before removal.

Au contraire, les dimensions et formes des cavités 14 et 15 cor respondent aux inserts après fermeture. il est en particulier important qu les striures de l'insert, après retrait, correspondent exactement aux striures des cavités 14, 15 et que le posi ticrsnement soit soigneusement effectué. On the contrary, the dimensions and shapes of the cavities 14 and 15 correspond to the inserts after closing. it is in particular important that the ridges of the insert, after removal, correspond exactly to the ridges of the cavities 14, 15 and that the positioning is carefully carried out.

Au premier cycle d'injection, seul le canal dtinjert on il est alimenté. Après cette première injection, les inserts ainsi obtenus sont disposes soignesement dans les cavités 14, 15 qui leur corresponcent. Au second cycle d'injection et aux ulvant, les canaux d'injection 6 et il sont alimentés, de sorte qu'on obtient des semelles surmoulés sur les inserts et un nouveau jeu d'inserts pour le cycle d'injection suivant.  In the first injection cycle, only the channel dtinjert on it is supplied. After this first injection, the inserts thus obtained are carefully placed in the cavities 14, 15 which correspond to them. At the second injection cycle and at the ulvants, the injection channels 6 and it are supplied, so that molded soles are obtained on the inserts and a new set of inserts for the next injection cycle.

Claims (6)

REVENDICATIONS 1. Semelle rigide en polychlorure de vinyle (PVC) du type comprenant un corps de semelle (1) muni d'au moins un insert (2,3) en contact avec le sol et formant surface d'usure, caractérisée en ce que les inserts (2,3) sont en un polychlorure de vinyle de dureté moins élevée que celle du polychlorure de vinyle du corps de la semelle (1).1. Rigid polyvinyl chloride (PVC) sole of the type comprising a sole body (1) provided with at least one insert (2,3) in contact with the ground and forming a wear surface, characterized in that the inserts (2,3) are made of a polyvinyl chloride of lower hardness than that of polyvinyl chloride of the body of the sole (1). 2. Semelle selon la revendication 1, caractérisée en ce q--e le corps de semelle (1) a une dureté shore comprise entre 75 et 85 et l'insert (2,3) a une dureté shore comprise entre 60 et 65.2. Sole according to claim 1, characterized in that - the sole body (1) has a shore hardness between 75 and 85 and the insert (2,3) has a shore hardness between 60 and 65. 3. Semelle selon l'une des revendications 1 et .2, caractérisée en ce que l'insert comporte des nervures d'assemblage par fusion avec le corps de semelle.3. Sole according to one of claims 1 and .2, characterized in that the insert comprises assembly ribs by fusion with the sole body. 4. Procédé de fabrication d'une semelle selon l'une des revendications 1 à 3, caractérisé en ce qu'on injecte s multanément dans au moins deux empreintes (12,13,16,17,18,19) d'un même moule (M,M'), an moyen de deux vis d'injection distinctes, deux polychlorures de vinyle de duretés différentes, une première empreinte (16,17,18,19) ayant la forme et les dimensions d'un insert (2,3) avant retrait, la se conte empreinte (12,13) ayant la forme et les dimensions de la se nielle et comportant une cavité (14,15), ayant la forme et les dimensions dudit insert (2,3) apyres retrait, un insert (2,3) prove nuant de l'opération d'injection précédente étant placé dans ladite cavité (14,15) avant l'injection.4. A method of manufacturing a sole according to one of claims 1 to 3, characterized in that injects s simultaneously in at least two imprints (12,13,16,17,18,19) of the same mold (M, M '), by means of two separate injection screws, two polyvinyl chloride of different hardnesses, a first impression (16,17,18,19) having the shape and the dimensions of an insert (2 , 3) before removal, the tale imprint (12,13) having the shape and dimensions of the nial and comprising a cavity (14,15), having the shape and dimensions of said insert (2,3) apyres removal , an insert (2,3) coming from the previous injection operation being placed in said cavity (14,15) before injection. 5 Procédé selon la revendication 4, caractérisé en ce que la surface des inserts venant en contact ave le corps de semelle présente des nervures d'assemblage par fusion parallèles ou croisées pour former un quadrillage.  5 Method according to claim 4, characterized in that the surface of the inserts coming into contact with the sole body has assembly ribs by parallel or crossed fusion to form a grid. 6. Moule pour la mise en oeuvre du procédé selon l'une des revendications 4 et 5, caractérisé en ce qu'il comprend au moins une empreinte (12,13) de corps de semelle et une empreinte d'insert (16,17,18,19), l'empreinte (12,13) de corps de semelle comportant au moins une cavité (14,15) d'insert dont la forme et les dimensions correspondent à celles de l'insert (2,3) après retrait, la forme et la dimension de ltempreinte d'insert (16,17,18,19) correspondant à celles de l'insert (2,3) avant retrait, et des canaux d'injection (6,11) séparés pour chaque empreinte (12,13,16,17,18 19)  6. Mold for implementing the method according to one of claims 4 and 5, characterized in that it comprises at least one imprint (12,13) of the sole body and an imprint of an insert (16,17 , 18,19), the imprint (12,13) of the sole body comprising at least one cavity (14,15) of insert whose shape and dimensions correspond to those of the insert (2,3) removal, the shape and size of the insert imprint (16,17,18,19) corresponding to those of the insert (2,3) before removal, and separate injection channels (6,11) for each fingerprint (12,13,16,17,18 19)
FR9005333A 1990-04-26 1990-04-26 Rigid non-slip sole, method and mould for manufacturing it Withdrawn FR2661322A1 (en)

Priority Applications (1)

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FR9005333A FR2661322A1 (en) 1990-04-26 1990-04-26 Rigid non-slip sole, method and mould for manufacturing it

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Application Number Priority Date Filing Date Title
FR9005333A FR2661322A1 (en) 1990-04-26 1990-04-26 Rigid non-slip sole, method and mould for manufacturing it

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FR2661322A1 true FR2661322A1 (en) 1991-10-31

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Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP1637051A1 (en) * 2004-09-16 2006-03-22 Calzaturificio Orion S.p.A. Anti-slip sole for footwear, particularly for safety shoe, and relative production method
WO2018163067A1 (en) 2017-03-08 2018-09-13 Compagnie Générale Des Établissements Michelin Non-slip sole

Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE2161573A1 (en) * 1971-12-11 1973-06-14 Uhl Sportartikel Karl OUTSOLE FOR SHOES OF ALL KINDS, IN PARTICULAR SPORT SHOES
FR2300515A1 (en) * 1975-02-12 1976-09-10 Hoki Sa Manufacture Chaussures Moulded shoe sole with reinforced heel tip - made by placing skid and wear resistant pastille in mould prior to sole moulding
FR2520663A1 (en) * 1982-02-03 1983-08-05 Combaret Yves Injection-moulded thermoplastics soles with raised heel - incorporating heel-piece moulded in previous cycle

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE2161573A1 (en) * 1971-12-11 1973-06-14 Uhl Sportartikel Karl OUTSOLE FOR SHOES OF ALL KINDS, IN PARTICULAR SPORT SHOES
FR2300515A1 (en) * 1975-02-12 1976-09-10 Hoki Sa Manufacture Chaussures Moulded shoe sole with reinforced heel tip - made by placing skid and wear resistant pastille in mould prior to sole moulding
FR2520663A1 (en) * 1982-02-03 1983-08-05 Combaret Yves Injection-moulded thermoplastics soles with raised heel - incorporating heel-piece moulded in previous cycle

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP1637051A1 (en) * 2004-09-16 2006-03-22 Calzaturificio Orion S.p.A. Anti-slip sole for footwear, particularly for safety shoe, and relative production method
WO2018163067A1 (en) 2017-03-08 2018-09-13 Compagnie Générale Des Établissements Michelin Non-slip sole

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