DK170547B1

DK170547B1 - Insole

Info

Publication number: DK170547B1
Application number: DK108893A
Authority: DK
Inventors: K Toosbuy
Original assignee: Eccolet Sko As
Priority date: 1993-09-27
Filing date: 1993-09-27
Publication date: 1995-10-23
Also published as: DK108893A; DK108893D0

Description

DK 170547 B1DK 170547 B1

Opfindelsen angår en indlægssål af den art, som omfatter et nedre lag af en blanding af elastisk materiale og kork, et eller flere mellemlag lag af skummateriale, såsom skumgummi, og et øvre skindlag, som har en bræmme, der rager uden for 5 mellemlaget eller -lagene, hvilken bræmme er forankret direkte til det nedre lag.BACKGROUND OF THE INVENTION 1. Field of the Invention The invention relates to an insole of the kind comprising a lower layer of a mixture of elastic material and cork, one or more interlayer layers of foam material such as foam rubber, and an upper skin layer having a brim extending beyond the intermediate layer or layers, which brake is anchored directly to the lower layer.

Fra DE patentskrift nr. 3.840.003 kendes en indlægssål af denne art, som nedefra og opefter består af et lag af en kork-latex-blanding, et lag af skummateriale og et øvre skindlag, 10 som har en bred bræmme hele vejen rundt langs sålen. Denne bræmme rager uden for mellemlagene og er direkte forankret til oversiden af randområdet af kork-latex-blandingen, idet sidstnævnte er trukket op langs med og forbi siden af mellemlagene. Denne indlægssål er ikke helt tilfredsstillende, fordi bræmmen 15 og dermed skindlaget for let kan løsne sig fra det underliggende mellemlag, når sålen bøjes mange gange.DE patent specification 3,840,003 discloses an insole of this kind, which consists of a bottom-up layer of a cork-latex mixture, a layer of foam material and an upper leather layer 10 having a wide brake all the way around sole. This brake protrudes outside the intermediate layers and is directly anchored to the upper side of the rim region of the cork-latex mixture, the latter being pulled up along and past the side of the intermediate layers. This insole is not completely satisfactory, because the bracket 15 and thus the leather layer can easily detach from the underlying intermediate layer when the sole is bent many times.

Det er formålet med opfindelsen at anvise en indlægssål af den ovenfor nævnte art, som muliggør en mere pålidelig fastgørelse af skindlagets bræmme til det underliggende materiale, så at 20 skindlaget og dettes bræmme bedre tåler et stort antal bøjninger uden at løsne sig fra det ae underliggende lag.SUMMARY OF THE INVENTION It is an object of the invention to provide an insole of the above-mentioned type which allows a more reliable attachment of the skin layer's bracket to the underlying material, so that the leather layer and its bristles better withstand a large number of bends without detaching from the ae layer.

Indlægssålen ifølge opfindelsen er ejendommelig ved, at det nedre lags elastiske materiale er polyurethan, og at det øvre skindlags bræmme har en ret lille bredde og har en tykkelse på 25 mindst 1,5 mm, og at bræmmen på tre sider er omsluttet af polyurethan-kork-blandingen. Derved opnås, at skindlagets bræmme på meget pålidelig måde vil indlejres i polyurethan-kork-blandingen, idet bræmmen inden påføringen af blandingen vil stritte ud fra de øvrige lag uden at røre disse, men under 30 påføringen af blandingen vil kunne indlejres solidt i blandingen, idet sidstnævnte lægger sig ind til bræmmen ved dennes tre sider. Denne forankring af bræmmen har vist sig at gøre indlægssålen særligt slidstærk med hensyn til at kunne tåle mange gentagne bøjninger.The insole according to the invention is characterized in that the elastic material of the lower layer is polyurethane and that the upper skin layer brakes have a rather small width and a thickness of at least 1.5 mm and that the three-sided brim is enclosed by polyurethane. cork mixture. In this way it is achieved that the skin layer's brakes will be very reliably embedded in the polyurethane-cork mixture, since before applying the mixture the bristles will protrude from the other layers without touching them, but during the application of the mixture can be firmly embedded in the mixture. the latter attaching itself to the brake at its three sides. This anchorage of the brake has been found to make the insole particularly durable in terms of being able to withstand many repetitive bends.

2 DK 170547 B12 DK 170547 B1

Ifølge en udførelsesfonn for opfindelsen kan bredden af skindlagets bræmme ligge i intervallet 0,01 - 0,03, fortrinsvis 0,015 - 0,025 gange skumgummilagets bredde i fodbaldeområdet.According to an embodiment of the invention, the width of the skin layer brakes may be in the range of 0.01 - 0.03, preferably 0.015 - 0.025 times the width of the foam rubber layer in the football area.

Herved opnås særlig stor sikkerhed for, at bræmmen, når skind-5 laget er korrekt placeret på de øvrige materialelag, vil stritte ud fra disse (altså ikke lægge sig ind til dem), og at polyurethanskumkork-blandingen, når denne påstøbes, effektivt 4 vil forankre bræmmen.This provides particularly great assurance that when the skin layer is properly placed on the other layers of material, the brake will protrude therefrom (ie not settle into them) and that the polyurethane foam cork blend when applied is effective 4 will anchor the brake.

Fremdeles kan ifølge en udførelsesform opfindelsen skindlagets 10 bræmme på den ene eller begge sider være påført et afstivende materiale, såsom lim, flis eller stofmateriale. Herved opnås ekstra sikkerhed for, at bræmmen vil udvise fornøden stivhed, når polyurethan-kork-blandingen påstøbes på indlægssålen.Still, according to one embodiment, the brakes of the skin layer 10 can be applied to one or both sides of a stiffening material such as glue, wood chips or fabric material. This provides additional assurance that the bark will exhibit the required stiffness when the polyurethane-cork mixture is applied to the insole.

Ifølge endnu en udførelsesform for opfindelsen kan skindlaget 15 og dermed dettes bræmme hensigtsmæssigt være af foerskind, ruskind eller skindlignende dæksålsmateriale.According to yet another embodiment of the invention, the leather layer 15 and thus its brakes may conveniently be of foreskin, suede or leather-like cover sole material.

Opfindelsen angår også en fremgangsmåde til fremstilling af indlægssåler ifølge opfindelsen under brug af en form med i hvert fald en formunderdel og en formoverdel. Denne fremgangs- 20 måde er ejendommelig ved, ate et lag skind og et lag skumgummi udstanses i sålefacon, idet skindsålen gøres lidt større end '·% skumgummisålen, og at disse såler derefter sammenlimes til en sålenhed, idet skindsålen danner en rundtgående bræmme på enheden, hvorefter sålenheden anbringes i formunderdelen, idet 25 bræmmen bringes til at rage frit ud i formhulrummet uden at berøre noget heri, hvorefter en blanding af polyurethan og kork sprøjtes ind i formen, og denne lukkes, mens blandingen svulmer op og lægger sig omkring bræmmen og til sidst størkner. Denne fremgangsmåde har vist sig særlig hensigtsmæssig 30 til fremstilling af indlægssålen ifølge opfindelsen.The invention also relates to a method of making insoles according to the invention using a mold having at least one mold bottom and a mold top. This method is peculiar in that a layer of leather and a layer of foam rubber are punched into the sole shape, the leather sole being made slightly larger than the 1% foam rubber sole, and then these soles being bonded to a sole unit, the leather sole forming a circumferential brake on the unit. , after which the sole unit is placed in the mold base, causing the brake to protrude freely into the mold cavity without touching anything therein, then a mixture of polyurethane and cork is injected into the mold, which is closed while the mixture swells and settles around the mold and eventually solidifies. This method has proved particularly convenient for the manufacture of the insole according to the invention.

En udformning af fremgangsmåden ifølge opfindelsen er ejendom- 1 melig ved, at den anvendte blanding af polyurethan og kork indeholder ca. 40 - 50 vægt% polyurethan og ca. 50 - 60 vægt% 3 DK 170547 B1 kork, og at temperaturen af blandingen under indsprøjtningen i formen ligger på 40 - 50°C, fortrinsvis 50°C. Herved opnås, at polyurethan-kork-blandingen under udstøbningen omkring skindlagets bræmme vil lægge sig intimt ind til sidstnævnte på de 5 tre sider af denne, så at bræmmen altså indlejres pålideligt i blandingen. Blandingen vil hverken under udsprøjtningen eller opskumningen kunne presse bræmmen ned mod enten en væg i formen eller et eller flere af de andre lag i sålenheden.An embodiment of the process according to the invention is characterized in that the polyurethane and cork mixture used contains approx. 40-50% by weight polyurethane and approx. 50 to 60% by weight of cork, and that the temperature of the mixture during injection into the mold is 40-50 ° C, preferably 50 ° C. Hereby, the polyurethane-cork mixture is obtained during the casting around the skin layer brakes intimately to the latter on the three sides thereof, so that the broth is thus reliably embedded in the mixture. During the spraying or foaming, the mixture will not be able to push the brake down against either a wall in the mold or one or more of the other layers in the sole unit.

Opfindelsen forklares nedenfor under henvisning til tegningen, 10 hvor fig. 1 viser en del af et tværsnit i en udførelsesform for indlægssålen ifølge opfindelsen fig. 2 viser en sålenhed, som indgår i indlægssålen ifølge opfindelsen, set i perspektiv, idet sålenhedens underside 15 vender opad, fig. 3 en del af samme anbragt på en formunderdel, idet skindlaget vender mod formunderdelen og skindlagets bræmme stikker ud i formhulrummet, fig. 4 samme, idet blandingen af polyurethan og kork er place-20 ret oven på sålenheden, og fig. 5 samme, efter at formoverdelen og formsidedelene er blevet placeret på formunderdelen. 1 fig. 1 ses en del af en færdig indlægssål 1 ifølge opfindelsen. Denne indlægssål består øverst af et skindlag 2, som er 25 anbragt oven på et lag 3 af skummateriale, såsom skumgummi, som igen er anbragt oven på et nedre lag 4 af en blanding af elastisk materiale, såsom polyurethan, og kork. Skindlaget 2 har en rundtgående bræmme 20, se også fig. 2.The invention is explained below with reference to the drawing, in which fig. 1 shows a part of a cross-section in an embodiment of the insole according to the invention fig. 2 is a perspective view of a sole unit forming part of the insole according to the invention, with the underside 15 of the sole unit facing upwards; FIG. 3 shows a portion of the same disposed on a mold base, with the skin layer facing the mold base and the brim of the leather layer protruding into the mold cavity; FIG. 4 is the same, the mixture of polyurethane and cork being placed on top of the sole unit, and FIG. 5, after the mold top and mold side parts have been placed on the mold bottom. 1 FIG. 1, a portion of a finished insole 1 according to the invention is seen. This insole consists at the top of a leather layer 2 which is placed on top of a layer 3 of foam material, such as foam rubber, which in turn is placed on top of a lower layer 4 of a mixture of elastic material such as polyurethane and cork. The skin layer 2 has a circumferential brake 20, see also fig. 2nd

4 DK 170547 B1 I fig. 2 ses en sålenhed 5, som udgør en del af den færdige indlægssål. Sålenheden 5's skindlag 2, hvorpå bræmmen 20 befinder sig, ligger nederst, og oven på skindlaget er det førnævnte skumgummilag 3 pålimet. Bræmmen 20 er tilvejebragt 5 ved, at skumgummilaget har lidt mindre dimensioner end laget 2. Begge lag er udstanset til sålefacon.4 DK 170547 B1 In fig. 2 shows a sole unit 5 which forms part of the finished insole. The skin layer 2 of the sole unit 5, on which the bore 20 is located, lies at the bottom and on top of the skin layer the aforementioned foam rubber layer 3 is glued. Beam 20 is provided 5 because the foam rubber layer has slightly smaller dimensions than layer 2. Both layers are punched into sole shape.

ΛΛ

Skindlaget 2' s bræmme 20 har en bredde a, som er ret lille.The brim 20 of the skin layer 2 has a width a which is quite small.

Som det fremgår af fig. 1, er bræmmen 20 på tre sider helt omsluttet af laget 4 af polyurethan-kork-blanding, idet sidst-10 nævnte er trukket op langs med og forbi siden af skumgummilaget 3 og også lidt op over skindlaget 2. Dette betyder, at skindlaget 2 og især dettes bræmme 20 - selv om den sko, hvori indlægssålen indgår, udsættes for et stort antal bøjninger -vil hæfte meget effektivt til det underliggende lag, og bræm-15 men vil være effektivt forankret.As shown in FIG. 1, the bead 20 is completely enclosed on three sides by the polyurethane-cork blend layer 4, the latter 10 being pulled up along and past the side of the foam rubber layer 3 and also slightly above the skin layer 2. This means that the skin layer 2 and in particular its brake 20 - although the shoe comprising the insole is subjected to a large number of bends - will adhere very effectively to the underlying layer, and the brake 15 will be effectively anchored.

Bræmmen 20 kan have en bredde a, som ligger i intervallet 0,01 - 0,03, fortrinsvis 0,015 - 0,025 gange skumgummilagets 3 bredde b i fodbaldeområdet, se fig. 1. Skindlagets 2 og dermed bræmmen 20's tykkelse er mindst 1,5 mm, så at bræmmen vil 20 udvise en relativ stor stivhed, forstået på den måde, at bræmmen ikke vil have tendens til at krænge ind mod skumgummi laget 3 eller til den modsatte side under påføring af laget 4.Beam 20 may have a width a which is in the range of 0.01 - 0.03, preferably 0.015 - 0.025 times the width b of the foam rubber layer 3 in the football area, see fig. 1. The thickness of the skin layer 2 and thus the bark 20 is at least 1.5 mm, so that the bark 20 will exhibit a relatively high stiffness, understood in that the bark will not tend to penetrate the foam rubber layer 3 or to the opposite. side during application of the layer 4.

Bræmmen 20 kan være tilsat et afstivende materiale, såsom lim, flies eller stofmateriale, som er påført på den ene eller 25 begge sider af bræmmen.Brake 20 may be added to a stiffening material such as glue, tile or fabric material applied to one or both sides of the brake.

Skindlaget 2 og dermed bræmmen 20 kan f.eks. være af foer-skind, ruskind eller passende dæksålsmateriale.For example, the skin layer 2 and thus the brim 20 can be of lining leather, suede or suitable cover sole material.

Indlægssålen ifølge opfindelsen fremstilles hensigtsmæssigt på * følgende måde.The insole of the invention is conveniently prepared in the following manner.

* 30 Først udstanses et lag skind 2 og et lag skumgummi 3 i sålefacon, idet skindsålens 2 dimensioner er valgt lidt større end 5 DK 170547 B1 skumgummisålens 3 dimensioner. Disse såler sammenlimes derefter til én sålenhed 5 (smig. fig. 2), idet skindsålen 2 danner den førnævnte bræmme 20 på sålenheden. Derefter anbringes sålenheden 5 på en formunderdel 10, idet skumgummilaget 3 5 vender opad. Dette er vist i fig. 3. Det bemærkes, at bræmmen 20 stikker lige ud i formhulrummet uden at være drejet ind mod skumgummilaget 3 eller ned mod formunderdelen. Derefter udsprøjtes der på oversiden af skumgummilaget 3 en blanding 4 af polyurethan og kork, se fig. 4, hvorefter formen lukkes ved at 10 formens sidedele 11a og llb føres ned på formunderdelen 10, og formens overdel 12 føres ned mod formsidedelene 11a og llb, se fig. 4. Blandingen af polyurethan og kork får nu lov at svulme op, og herunder vil blandingen lægge sig intimt ind til de tre frie sider af bræmmen 20, hvorved sidstnævnte bliver meget 15 solidt forankret i blandingsmaterialet 4. Efter nogen tid er blandingsmaterialet 4 størknet, hvorefter formdelene kan adskilles, og den færdige indlægssål udtages.* 30 First, a layer of leather 2 and a layer of foam rubber 3 are punched into the sole shape, the dimensions of the leather sole 2 being chosen slightly larger than the dimensions of the foam rubber sole 3 dimensions. These soles are then glued to one sole unit 5 (Fig. 2), the leather sole 2 forming the aforementioned brake 20 on the sole unit. Then, the sole unit 5 is placed on a mold base 10 with the foam rubber layer 35 facing up. This is shown in FIG. 3. It should be noted that the brake 20 protrudes straight into the mold cavity without being turned toward the foam rubber layer 3 or down toward the mold base. Then a mixture 4 of polyurethane and cork is sprayed on the upper side of the foam rubber layer 3, see fig. 4, after which the mold is closed by passing down the side portions 11a and 11b of the mold onto the mold base 10 and the upper part 12 of the mold being brought down towards the mold side parts 11a and 11b, see fig. 4. The blend of polyurethane and cork is now allowed to swell, and below this the blend will settle intimately to the three free sides of the baffle 20, whereby the latter becomes very firmly anchored in the blend material 4. After some time the blend material 4 is solidified, after which the mold parts can be separated and the finished insole removed.

Det er mest hensigtsmæssigt, såfremt blandingen af polyurethan og kork har følgende sammensætning: 20 40 vægt% polyurethan 60 vægt% kork.It is most convenient if the mixture of polyurethane and cork has the following composition: 40% by weight polyurethane 60% by weight cork.

Under blandingen 4's indsprøjtning i formen 10, 11a, llb, 12 kan blandingens temperatur ligge på 40 - 50cC, fortrinsvis 50°C.During the injection of the mixture 4 into the molds 10, 11a, 11b, 12, the temperature of the mixture may be 40-50 ° C, preferably 50 ° C.

25 Opfindelsen kan ændres på mange måder, uden at der derved afviges fra dens idé. Således kan der i stedet for skumgummi i laget 3 anvendes andet materiale, som giver god gangkomfort. Eventuelt kan laget 3 bestå af flere slags skummateriale. Det afgørende er, at sålenheden 5 er så blød, at gangkomforten er 3 0 god.The invention can be changed in many ways without departing from its idea. Thus, instead of foam rubber in layer 3, other material can be used which provides good walking comfort. Optionally, layer 3 may consist of several types of foam material. The crucial thing is that the sole unit 5 is so soft that the walking comfort is good.

Indlægssålen kan f.eks. anvendes til fremstilling af sandaler.The insole can e.g. used for making sandals.

I dette tilfælde vil overlæderet være indstøbt mellem indlægs-In this case, the upper leather will be molded between inserts.

Claims

An insole of the type comprising a lower layer (4) of a mixture of elastic material and cork, one or more intermediate layers (3) of foam material, such as foam rubber, and an upper skin layer (2) having a brake (20) projecting outside the intermediate layer (s) (3), which bracket is anchored directly to the lower layer (4), characterized in that the elastic material of the lower layer 15 (4) is polyurethane and that the upper skin layer (2) brakes (20) have a rather small width (a) and have a thickness (t) of at least 1.5 mm and that the brim (20) is enclosed on three sides by the polyurethane-cork mixture (4) .

Insole according to claim 1, characterized in that the width (b) of the brim (20) of the leather layer (2) is in the range 0.01 - 0.03, preferably 0.015 - 0.025 times the width (b) of the foam rubber (3). fodbaldeområdet.

Insole according to claim 1 or 2, characterized in that the brim (20) of the leather layer (2) is applied to one or both sides of a stiffening material such as glue, tile or fabric material.

Insole according to one or more of claims 1 to 3, characterized in that the leather layer (2) and thus its brakes are of foreskin, suede or suitable cover sole material. DK 170547 B1

Process for manufacturing insoles according to one or more of claims 1-4, using a mold having at least one molding base and a molding upper, characterized in that a layer of leather (2) and a layer of foam rubber (3) are stamped in 5 sole shape, the leather sole (2) being made slightly larger than the foam rubber sole (3), and then these soles being bonded to one sole unit (5), the leather sole (2) forming a circumferential brake (20) on the unit (5), after which the sole unit (5) is applied to the mold base (10), causing the baffle (20) to protrude 10 freely into the mold cavity without touching any of it, after which a mixture (4) of polyurethane and cork is injected into the mold (10, 11a, 11b, 12), and this closes as the mixture (4) swells up and settles around the brake (20) and eventually solidifies.

Process according to claim 5, characterized in that the polyurethane and cork mixture (4) used contains approx. 40-50% by weight polyurethane and approx. 50-60% by weight of cork and the temperature of the mixture (4) during injection into the mold is 40-50 ° C, preferably 50 ° C. 20