FR2548579A1 - Mould intended for the manufacture of an article of footwear made of synthetic material as well as the article of footwear manufactured in such a mould - Google Patents

Mould intended for the manufacture of an article of footwear made of synthetic material as well as the article of footwear manufactured in such a mould Download PDF

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Publication number
FR2548579A1
FR2548579A1 FR8307828A FR8307828A FR2548579A1 FR 2548579 A1 FR2548579 A1 FR 2548579A1 FR 8307828 A FR8307828 A FR 8307828A FR 8307828 A FR8307828 A FR 8307828A FR 2548579 A1 FR2548579 A1 FR 2548579A1
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FR
France
Prior art keywords
mold
footwear
injection
mould
article
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.)
Pending
Application number
FR8307828A
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French (fr)
Inventor
Daniel Goupil
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.)
SAINT MARCEL Manufacturing
Original Assignee
SAINT MARCEL Manufacturing
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 SAINT MARCEL Manufacturing filed Critical SAINT MARCEL Manufacturing
Priority to FR8307828A priority Critical patent/FR2548579A1/en
Publication of FR2548579A1 publication Critical patent/FR2548579A1/en
Pending 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
    • B29D35/0009—Producing footwear by injection moulding; Apparatus therefor
    • B29D35/0018—Moulds
    • 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
    • B29D35/08—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 having multilayered parts
    • B29D35/081—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 having multilayered parts by injection moulding

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Footwear And Its Accessory, Manufacturing Method And Apparatuses (AREA)

Abstract

a. Mould constituted by a shell 1 and a last (form) 2 covered with an inner shoe (bootee, sock) and being able to be closed by a first block 3 and a second block 4, the mould being intended for the manufacture of an article of footwear made of synthetic material using two successive injections. b. The mould is characterised in that it includes means making it possible during the first injection to bring in a first instant all the injected material towards the front of the mould so as to be under the conditions of a front injection. c. The invention applies to the manufacture of an article of footwear.

Description

Moule destiné à la fabrication d'un
article chaussant .en matière synthétique
ainsi qu'article chaussant fabriqué dans
un tel moule
La présente invention.a.pour objet un moule cons titubé par. une. coquille et une forme recouverte. d.'un chausson et pouvant être fermé par un premier et un.second pavés, destiné à lafabrication .d.'un.article..cIiaussant en matière synthétique, notamment en polyuréthane, par une première injection de la tige et de la partie superieure de la semelle, notamment en polyuréthane de faible densité puis par une seconde injection de la semelle d'usure, notamment en polyuréthane de densité plus élevée après modification du moule par remplacement du premier pavé par l'arrière du moule.Mold intended for the manufacture of a
synthetic footwear
as well as footwear manufactured in
such a mold
The present invention.a.pour object a mold staggered by. a. shell and a covered shape. d.'a bootie and can be closed by a first and a.second paving stones, intended for the manufacture .d.'un.article..cIiaussant in synthetic material, in particular in polyurethane, by a first injection of the rod and the part upper of the sole, in particular in low density polyurethane then by a second injection of the outsole, in particular in polyurethane of higher density after modification of the mold by replacing the first pad by the rear of the mold.

Les machines existantes pour l'injection d'articles chaussants par le procédé décrit ci-dessus sont dans leur quasi-totalité conçues de telle sorte que l'injection se fait par l'arrière du moule, au niveau du talon, et ce pour de multiples raisons parmi lesquelles on peut noter le fait de faciliter l'emmanchement du chausson sur la forme. Existing machines for the injection of footwear by the process described above are almost entirely designed so that the injection is made from the rear of the mold, at the heel, and this for multiple reasons among which we can note the fact of facilitating the fitting of the liner on the form.

Cependant, cette injection par l'arrière du moule n'est pas sans avoir de multiples inconvénients, notamment lors de l'injection de la tige, étant donné que, en raison de pertes de charges très importantes dues à la fluidité de la matière ir.;-eztée, celle-ci remonte difficilement, et se trouve dans l'incapacité d'expulser la totalité de l'air présent dans le moule et de pénètrer dans tous ses motifs lorsque celui-ci n'est pas lisse. Donc, dans les processus actuels d'injection par l'arrière, l'emprisonnement de bulles d'air est pratiquement inévitable lors de l'injection de la tige de l'article chaussant. However, this injection from the rear of the mold is not without having numerous drawbacks, in particular during the injection of the rod, since, due to very high pressure losses due to the fluidity of the material ir .- eztée, it rises with difficulty, and is unable to expel all of the air present in the mold and penetrate into all its patterns when it is not smooth. Therefore, in current rear injection processes, the entrapment of air bubbles is practically inevitable when injecting the upper of the footwear.

La présente invention se propose de remédier à cet inconvénients en proposant un moule permettant de limiter les pertes de charges lors de la première injection. The present invention proposes to remedy this drawback by proposing a mold making it possible to limit the pressure drops during the first injection.

A cet effet, l'invention se rapporte à un moule du type ci-dessus, caractérisé en ce qu'il comporte des moyens permettant, lors de la première injection, d'amener dans un premier temps la totalité de la matière injectée vers l'avant du moule. To this end, the invention relates to a mold of the above type, characterized in that it comprises means making it possible, during the first injection, to bring all the injected material to the first place. 'front of the mold.

Donc, l'invention consiste en fait à proposer un moule qui permette de réaliser un processus d'injection par l'arrière dans des conditions équivalentes à celles d'une injection par l'avant, c'est-à-dire en diminuant notablement les pertes de charges. Therefore, the invention in fact consists in proposing a mold which makes it possible to carry out a process of injection from the rear under conditions equivalent to those of an injection from the front, that is to say by significantly reducing pressure losses.

Selon une autre caractéristique de l'invention, les moyens permettant d'amener la totalité de la matière injectée vers l'avant du moule sont constitués par un canal de remplissage longitudinal creusé dans le premier pavé entre le talon et le bout de la chaussure. According to another characteristic of the invention, the means making it possible to bring all of the material injected towards the front of the mold consist of a longitudinal filling channel hollowed out in the first block between the heel and the end of the shoe.

Donc, lors de l'injection, la totalité de la matière injectée qui est très fluide, s'engouffre dans ce premier canal et vient se rassembler au niveau du bout de la chaussure avant de venir remplir la totalité de l'espace existant entre la coquille, la forme et le premier pavé. So, during the injection, all of the injected material which is very fluid, rushes into this first channel and comes together at the toe of the shoe before coming to fill the entire space existing between the shell, shape and first paving stone.

Néanmoins, pour que le moule conforme à l'invention puisse fonctionner de manière convenable, il est indispensable d'empêcher la matière injectée de remonter de part et d'autre du canal de remplissage avant d'avoir atteint le bout de la chaussure. However, in order for the mold according to the invention to function properly, it is essential to prevent the injected material from rising on either side of the filling channel before having reached the end of the shoe.

En conséquence, et selon une autre caractéristique de l'invention, le premier pavé est usiné de manière telle qu'il existe entre lui-même et la forme, des rétrécissements, prévus de part et d'autre du canal de remplissage pour empêcher toute remontée de la matière injectée au niveau de ce canal. Consequently, and according to another characteristic of the invention, the first block is machined in such a way that there exist between itself and the shape, narrowing, provided on either side of the filling channel to prevent any ascent of the material injected at this channel.

Selon l'invention, ces rétrécissement coopèrent avec le chausson recouvrant la forme pour constituer des joints d'étanchéité, de part et d'autre du canal de remplissage et parallèles à son axe. According to the invention, these narrowing cooperate with the liner covering the form to form seals, on either side of the filling channel and parallel to its axis.

La présence de ces deux joints d'étanchéité permet de garantir que la totalité de la matière injectée au niveau du talon puisse parvenir au niveau du bout de la chaussure avant de remplir l'espace libre du moule. The presence of these two seals ensures that all of the material injected at the heel can reach the toe of the shoe before filling the free space of the mold.

L'invention se rapporte également à tout article chaussant fabriqué dans le moule décrit ci-dessus. The invention also relates to any footwear manufactured in the mold described above.

Les caractéristiques du moule et de l'article chaussant qui font ltobjet de l'invention, seront décrites plus en détail en se référant aux dessins annexés dans lesquels
- la figure 1 est une vue en coupe du moule selon l'invention une fois la première injection terminée,
- la figure 2 est une coupe du moule représenté sur la figure 1 selon l'axe Il-Il et
- la figure 3 est une coupe du moule représenté sur la figure 1 selon l'axe III-III.The characteristics of the mold and of the footwear which are the subject of the invention will be described in more detail with reference to the accompanying drawings in which
FIG. 1 is a sectional view of the mold according to the invention once the first injection has been completed,
- Figure 2 is a section of the mold shown in Figure 1 along the axis Il-Il and
- Figure 3 is a section of the mold shown in Figure 1 along the axis III-III.

Selon les figures, le moule qui fait l'objet de l'invention est constitué par une coquille 1 et une forme 2 recouverte d'un chausson non représenté et, pour la phase de procédé considérée est fermé par un premier pavé 3. According to the figures, the mold which is the subject of the invention consists of a shell 1 and a shape 2 covered with a liner not shown and, for the process phase considered, is closed by a first block 3.

De manière classique, la coquille 1 est faire en deux parties et l'injection est effectuée selon la flèche
A au niveau du talon 4 de l'article chaussant.Conventionally, the shell 1 is made in two parts and the injection is carried out according to the arrow
A at heel 4 of the footwear.

Comme il a déjà été indiqua, l'invention se propose d'amener la totalité de la matière injectée qui est relativement fluide selon la flèche a vers le bout 5 de l'article chaussant pour se placer dans des conditions équivalentes à une injection par l'avant, pour laquelle les pertes de charges sont moins importantes, et donc le risque d'emprisonner des bulles d'air est nettement diminué. As already indicated, the invention proposes to bring all of the injected material which is relatively fluid according to the arrow a towards the end 5 of the footwear to be placed in conditions equivalent to an injection by l 'before, for which the pressure drops are lower, and therefore the risk of trapping air bubbles is significantly reduced.

A cet effet, et comme représenté sur la figure 2, le premier patin 3 comporte un canal de remplissage longitudinal 6 creusé entre le talon 4 et le bout 5 de l'article chaussant pour amener la matière injectée selon la flèche A vers le bout 5.  To this end, and as shown in FIG. 2, the first shoe 3 has a longitudinal filling channel 6 hollowed out between the heel 4 and the end 5 of the footwear to bring the material injected according to arrow A towards the end 5 .

Pour empêcher que la matière injectée ne remonte selon les flèches b de part et d'autre du canal de remplissage 6 et pour s'assurer que la totalité de la matière injectée parvienne dans un premier temps vers le bout 5 de l'article chaussant, il est prévu de part et d'autre du canal de remplissage 6 des rétrécissements 7, 7' qui coopèrent avec le chausson non représenté recouvrant le moule 2 pour constituer un joint d'étanchéité. To prevent the injected material from going up according to the arrows b on either side of the filling channel 6 and to ensure that all of the injected material first reaches the end 5 of the footwear, it is provided on either side of the filling channel 6 of the narrowing 7, 7 'which cooperate with the liner not shown covering the mold 2 to form a seal.

En conséquence, les rétrécissements 7, 7' forment de part et d'autre du canal 6 et parallèlement à son axe, deux lignes de joint 8, 8' représentées en pointillés sur la figure 1. Consequently, the constrictions 7, 7 ′ form on either side of the channel 6 and parallel to its axis, two joint lines 8, 8 ′ shown in dotted lines in FIG. 1.

Bien entendu et comme représenté clairement sur la figure 3, au niveau du bout 5 de l'article chaussant les rétrécissements 7, 7' vont en s'évasant pour obtenir finalement la ccnfiguration uniforme représentée sur la figure 3 sur laquelle on ne distingue plus ni le canal 6 ni les rétrécissements 7, 7'.  Of course and as shown clearly in Figure 3, at the tip 5 of the article of footwear narrowing 7, 7 'are flared to finally obtain the uniform ccnfiguration shown in Figure 3 in which we can no longer distinguish nor the channel 6 nor the narrowing 7, 7 '.

Claims (6)

REVENDICATIONS 10) Moule constitué par une coquille et une forme recouverte d'un chausson et pouvant être fermé par un premier et un second pavés, destiné à la fabrication d'un article chaussant en matière synthétique, notamment en polyuréthane, par une première injection de la tige et de la partie supérieure de la semelle, notamment en polyuréthane de faible densité puis par une seconde injection de la semelle d'usure notamment en polyuréthane de densité plus élevée après modification du moule par remplacement du premier pavé par le second pavé, les deux injections étant effectuées par l'arrière du moule, moule caractérisé en ce qu'il comporte des moyens permettant lors de la première injection d'amener dans un premier temps la totalité de la matière injectée vers l'avant du moule de façon à se retrouver dans les conditions d'une injection par l'avant. 10) Mold consisting of a shell and a shape covered with a liner and capable of being closed by first and second blocks, intended for the manufacture of an article of footwear made of synthetic material, in particular polyurethane, by a first injection of the upper and upper part of the sole, in particular in low density polyurethane then by a second injection of the outsole in particular in polyurethane of higher density after modification of the mold by replacement of the first block by the second block, both injections being carried out from the rear of the mold, mold characterized in that it comprises means making it possible, during the first injection, to bring all the material injected towards the front of the mold in a first step so as to be found under the conditions of a front injection. 20) Moule selon la revendication 1, caractérisé en ce que les moyens permettant d'amener la totalité de la matière injectée vers l'avant du moule sont constitués par un canal longitudinal (6) creusé dans le premier pavé (3) entre le talon (4) et le bout (5) de la chaussure. 20) Mold according to claim 1, characterized in that the means making it possible to bring all of the material injected towards the front of the mold consist of a longitudinal channel (6) hollowed out in the first block (3) between the heel (4) and the end (5) of the shoe. 30) Moule selon l'une quelconque des revendications 1 et 2, caractérisé en ce qu'il comporte des rétrécissements (7, 7') entre la forme (2) et le premier pavé (3), prévus de part et d'autre du canal de remplissage (6) pour empêcher la remontée de la matière injectée au niveau de ce canai. 30) Mold according to any one of claims 1 and 2, characterized in that it comprises narrowing (7, 7 ') between the form (2) and the first block (3), provided on either side of the filling channel (6) to prevent the rise of the material injected at this channel. 40) Moule selon l'une quelconque des revendications 1 ê 3, caractérisé en ce que les rétrécissements (7, 7') coopèrent avec le chausson recouvrant la forme (2) pour constituer un joint d'étanchéité (8, 8'). 40) Mold according to any one of claims 1 to 3, characterized in that the constrictions (7, 7 ') cooperate with the liner covering the form (2) to form a seal (8, 8'). 50) Moule selon la revendication 4, caractérisé en ce que les rétrécissements (7, 7') forment deux joints d'étanchéité de part et d'autre du canal-de remplissage (6) et parallèles à son axe. 50) Mold according to claim 4, characterized in that the narrowing (7, 7 ') form two seals on either side of the filling channel (6) and parallel to its axis. 60) Article chaussant caractérisé en ce qu'il est fabriqué dans un moule selon l'une quelconque des revendications 1 à 5.  60) Footwear characterized in that it is manufactured in a mold according to any one of claims 1 to 5.
FR8307828A 1983-05-10 1983-05-10 Mould intended for the manufacture of an article of footwear made of synthetic material as well as the article of footwear manufactured in such a mould Pending FR2548579A1 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
FR8307828A FR2548579A1 (en) 1983-05-10 1983-05-10 Mould intended for the manufacture of an article of footwear made of synthetic material as well as the article of footwear manufactured in such a mould

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
FR8307828A FR2548579A1 (en) 1983-05-10 1983-05-10 Mould intended for the manufacture of an article of footwear made of synthetic material as well as the article of footwear manufactured in such a mould

Publications (1)

Publication Number Publication Date
FR2548579A1 true FR2548579A1 (en) 1985-01-11

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Application Number Title Priority Date Filing Date
FR8307828A Pending FR2548579A1 (en) 1983-05-10 1983-05-10 Mould intended for the manufacture of an article of footwear made of synthetic material as well as the article of footwear manufactured in such a mould

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Country Link
FR (1) FR2548579A1 (en)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5784737A (en) * 1992-08-26 1998-07-28 Yoshitaka Tsuji Folding shoes and process for manufacturing the same
CN102173074A (en) * 2011-01-21 2011-09-07 许建华 Novel sole production method

Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR1553738A (en) * 1967-08-21 1969-01-17
GB1351199A (en) * 1971-02-17 1974-04-24 Toja E Injection moulding footwear
FR2226271A1 (en) * 1973-04-17 1974-11-15 Inter Polymer Res Corp

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR1553738A (en) * 1967-08-21 1969-01-17
GB1351199A (en) * 1971-02-17 1974-04-24 Toja E Injection moulding footwear
FR2226271A1 (en) * 1973-04-17 1974-11-15 Inter Polymer Res Corp

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5784737A (en) * 1992-08-26 1998-07-28 Yoshitaka Tsuji Folding shoes and process for manufacturing the same
CN102173074A (en) * 2011-01-21 2011-09-07 许建华 Novel sole production method
CN102173074B (en) * 2011-01-21 2016-06-08 许建华 A kind of production method of sole

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