DE1485636A1 - Footwear with a multi-part sole and a method and device for producing such footwear - Google Patents

Description

The invention relates to footwear with a multi-part elastic sole that is injection-molded onto a shoe upper Foam, in particular foam plastic. Farther The invention relates to a method and device for producing such footwear.

It is already known to use foamed soles on shoe uppers made of leather, fabric, plastic or the like elastic material, so-called poro soles. Such foam soles have different Advantages, such as particularly favorable running properties and low weight. A disadvantage of the Foam soles are so far that they against / Cyclical stresses, especially against impacts are particularly sensitive at the edge of the sole, as the

109834/0002

BATH ORIGINAL

U85636

There is a risk that parts of the relatively woiclion Foam sole will be torn out, furthermore will felt to be a disadvantage that the visible outer sole edge due to the structure of the foam sole has an unappealing matte surface that gives the sole an unsightly appearance.

In an older application, it is already suggested the foam sole by a circumferential Edging of hand strips made of solid, homogeneous elastic material, which also acts as a connecting means for the outsole serves with the shaft. Here, the edge strip is first applied in an appropriately designed spray casting mold molded onto the shaft and finally in The sole is injected into the area of the hand strip.

The invention is also based on the object, the durability of a foam sole, in particular made of plastic, against mechanical stress isu improve and give the sole an attractive appearance, especially on the outer edge.

The invention proposes that the immediately amide shoe upper made of foam or to an insole connected to this eye-

109834/0002

injected the sole along its outer edge all around from an Iland strip injected onto the sole fms solid, homogeneous, elastic material, in particular Plastic is covered.

The present invention is based on the idea from first of all to inject the foam sole directly onto the shoe upper or onto an insole and then border the sole with the homogeneous strip of Iland. So the sole becomes immediate brought up to the connecting surfaces of the shaft. This solves the problem that a particularly good connection between the sole and the Upper is made. The edge strip surrounding the sole can be used as an additional connecting means or can only be used as a sheathing of the sole. The foam sole is preferred self-adhesive. This property was particularly noticeable in the case of polyurethane-based plastic plastics to be established. These foamed plastics can be attached directly to the shaft, which is made of leather, without glue can exist, connect. If necessary, however, an adhesive can also be used. Can also be used to manufacture a good, durable connection, the adhesive surfaces of the shaft or the insole must be roughened.

BATH

109834/0002

Because the sole itself is directly connected to the i & ftf of the upper or the insole is permanently connected, according to a further proposal of the invention, the injection molded onto the sole can The sideways strip across the damage serves as the edge of the sole protrude. This proposal has the task of To give the impression of a Ralunei shoe.

According to a further feature of the invention, the foam sole is injection-molded onto the entire lower surface of the upper or the insole connected to the upper and the outer strip is injection-molded onto a recess of the sole that ends in the ring, in such a way that the edge strip on its Over side is covered with a preferably very thin layer of foam. This proposal may be applied to both a shoe structure according to do.v invention, the i.iit einoLi projecting edge is formed, and in sfjlcheii footwear in de n is the sole to the shaft is flush. In the case of footwear without an upper, the thin layer of aluminum covering the upper edge of the upper edge of the handstripe with the upper ensures a good connection, since the foam practically acts as an adhesive between the upper and the upper. 15In a shoe with a protruding hand, the above-mentioned embodiment solves the problem of creating a

109834/0002 bad or

bond between the edge strip and the sole Effect foam. The verge is not only on its inner surface, but also on its special endangered upper liand uit the sole off Sc.iaunistoff connected.

A proposal of the invention, according to which the sole is not made of elastic foam, is particularly essential only on its outer edge, but also on the lower surfaces facing away from the shaft with a closed one Sheathing made of solid, homogeneous elastic material, in particular plastic is surrounded. Through this design the task is listed not only to protect the outer edge of the sole against mechanical stress, but also the tread of the sole, it is also achieved that the impression of an overall compact swept material is created, while the essential core is actually made of foam. As a result, the sole has good mechanical properties on the one hand, but low weight on the other and good running properties. Furthermore, this design solves the task of “preventing moisture from penetrating into the foam sole from the tread to prevent her. Ilei foam soles namely, there is a risk that the foam will act as a sponge and absorb moisture.

109834/0002

H85636

-G-

The various embodiments of the invention Footwear can also be made with a well-known felt insert are produced, which is located in particular between the usual lasting impact on the insole.

A erfindungsgeinäßes method for Hers division of such footwear in an injection mold consisting of a movable floor stump, a side frame and a strip provides that material for forming the sole of foam is first injected when the Dodensteinpels is positioned close to the last, then the Bodensteiupel for the purpose of expanding the sole The formation of pores is lowered and finally, after the sole has solidified, the injection mold for the injection of the material for the itcimlstrip or the sheathing is expanded. A three-stage process is used here.

When using foam plastics, for example Polyurethanes for which it is not necessary to keep the mold interior smaller during injection, the method according to the invention can be carried out in two stages Procedures are reduced. The material for the sole is equal to that of the final volume of the sole injected into the extensive interior of the shape. The testicular

109834/0002 bad oai ^

- ν -

Stamp be here rindet during the Einspritzeus in the dor sole thickness corresponding end position in which the sole dor material to solidify and to cure. It may be useful to use a dosing device for lens syringes so that the correct length of plastic is filled in every case.

When molding a coating that surrounds the sole on the lower surfaces and on the outer surface, in the case of the invention The headstamp is lowered again after the foam sole has solidified.

The device for carrying out the method according to the invention and thus for producing footwear according to the invention consists of a headstamp, a side frame and one on the side runners lowerable lasts to hold the upper part of the shoe. According to the invention, in an injection mold of this type, one that surrounds the bottom stamp is separately displaceable wreath in the thickness of the edge strip provided during the injection of the material the interior of the mold for the sole is laterally limited and can be lowered after the sole has solidified,

109834/0002

in such a way that there is a surrounding space for recording of the material for the edge strip is formed. Of the The wreath surrounding the headstamp has the task of a space to accommodate the edge strip to be injected later when the sole is made of foam to leave out. In practice, a multi-part headstamp finds its end, the parts of which are independent of one another move! i am.

For the production of footwear with single heel, the also with a cover made of homogeneous material is to be formed, according to the invention, a device is used in which the headstamp surrounding wreath is formed in several parts, so that this Parts according to the thickness of the strip of land to be sprayed on can be lowered differently. In the case of soles with heels, there is a sole part and a Independent paragraph part of the wreath provided.

The invention not only applies to the individual in the Documents disclosed individual notices, but also in the various possible combinations of these features seen one another.

109834/0002 ^B.

Further features and advantages are given below on the basis of the exemplary embodiments shown in the drawings the invention explained. It shows

Fig. Ii a shoe according to the invention in cross section;

FIG. 2i shows a shoe according to FIG. 1 during manufacture the foam sole;

Fig. 3l a shoe according to the invention in an injection " casting mold after injection of the hand strip;

¹ U shows a further embodiment of a shoe according to the invention in cross section in an injection mold;

Fig. 5 * a shoe with heel and heel casing along with injection mold in longitudinal section;

FIG. 6 shows the shoe together with the injection mold according to FIG. 5 when molding on a casing arranged laterally and below;

7l shows a further embodiment of a shoe according to the invention.

109834/0002 ⁶

In Fig. 1, a shoe according to the invention is shown in your a shaft 10 made of leather, textile fabric odor dergleicehn is provided with an insole 11. The ship 10 is designed in the usual way with a lasting 12.

According to the invention, a sole 13 made of an elastic material, in particular plastic, is molded onto the upper 10 or the insole 11 by injection molding. This sole 13 sits directly on the adhesive surfaces of the shaft 10 or on the insole 11. Adequate adhesion results from the use of certain materials, in particular foamed plastic on the polyurethane basis, by the material itself or the insole 11 be roughened or even with a
Adhesion promoter (glue) should be provided. It is also possible to use felt inserts in such a shoe
to be used, which then in the area between the Zwick—
knock in 12 lie.

The sole 13 made of foam is surrounded on the outer edge by an edge strip lk made of compact, homogeneous, non-foamed material,
in particular surrounded by plastic. This verge
is according to the invention to the first

109834/0002

placed and molded sole 13, so that a particularly intimate connection of the edge strip lk with the porous surface of the sole 13 is achieved. Wherein i; .- r i, RST (lltfn embodiment is shown a Ausfülirungsforin of the invention in the left half, wherein the upper edge of the edge strip \ h of by a preferably very thin layer 15 of foam, namely from the material Sole 13. As a result, the edge strip Ik cannot be seen upward. On the other hand, the impression of a shoe with ruffles is created. In addition, the connection between edge strip 1 ^ 1 and sole 13 in the left half of the embodiment according to FIG.

The execution continuation according to the right half of the illustration the edge strip l'i runs over the entire Height of the sole 131 so that the sole 13 or whose material is not visible. This vrird the task solved, the impression of a sole consisting of compact material over the entire height

The production of a shoe according to FIG. 1 in the individual stages of extension in a form according to the invention will be explained changing FIGS. 2 and 3. The shaft 10 with the insole 11 sits in a manner known per se on a last Ib. Dicsrr is on one the injection molding-

BATHROOM UNIVERSAL

109834/0002

form laterally delimiting side runner 17 lowered. The injection mold is delimited at the bottom by a bottom pile 18. In Be tenralunen 17 a round running recess 19 is formed in the thickness of the edge strip lk . In this recess I ¹ J there is a wreath 20 surrounding the headstamp Iu. This ring 20 is also displaceable, but independent of the movements of the bottom stamp Iu.

In the starting position, the rim 20 is in the relative position shown, namely in the recess , so that a barely to on nahine the later edge strip lk covering layer 15 is present, in the

right
Embodiment according to the / frame halftone is the

Ring 20 directly on the sealing lip 21 nii.

The material for the sole 13 is conveyed via an injection channel 22 running in the headstamp Io branches opening into the surface of the bottom stamp 23 injected. The injection channel 22

109834/0002 BAD QfiiGiKAL

in the injection position is aligned with one in the side frame running injection channel (not shown).

The material provided with blowing agent for the sole is injected at a position of the bottom stamp, which is indicated by the dashed line 2.k. In order to expand the material to form the pores, the bottom stamp is then lowered into the position shown and the foam is formed. The actual oil is thus ready after hardening (see FIG. 3). Then the rim 20 is lowered into the position shown in FIG. 3, the rim 20 expediently being flush with the surface of the base stamp. The material for the lateral strip lk is then injected into the space that has become free via a separate injection channel (not shown) into a side frame. This connects to the sole 13 in a particularly durable manner.

A similar embodiment is shown in Fig k ,, as in the previous FIGS. Here, however, the sole or the hand Ik strip is not over the shaft 10 away. Ea , however , a thin layer 15 covering the upper edge d «a hand strap lh made of the particularly well-adhering material of the sole 13, which practically acts as an adhesive, is provided.

109834/0002

U85636

- 14 -

FIG. 5 shows a longitudinal section of a shoe according to the invention with an injection mold, in which a shoulder 25 is seen, which should also be given a circumferential Ιίί strip. For this purpose , the engraving foria is fixed with regard to the design of the interior.: O eti.as iaoclifixiert. The wreath is in fact formed in at least two parts, in such a way that a sole part 20a and a heel part 20b of the liranzes are disfigured. These are separated from one another in the area between shoulder 25 and joint 2½ trr-'r, so that both parts 2Ua and 2üb of the ϊ ^ π · η .-. <- 3 can be moved independently of one another and independently of the Bociensteiliipel Io. To delimit the surface 27 of the shoulder 25 facing the joint 26, a transverse S te}; 2O present, which saves ο a corresponding space for later recording of the edge strip in this area during the injection of the sole 13, via a web 23 can be connected to the sole part 20a, provided that the height of the surface 27 corresponds to the thickness of the sole 13. In this case, the sole part 20a of the rim and the web 20 can be lowered at the same time and by the same amount. In contrast, the heel part 20b of the rim is lowered by a greater amount, namely in accordance with the strength of the heel. If, however, the area is 27 deep

109834/0002

H85636

satses 25 is higher than the thickness of the sole IJ is the Web 20 provided as a further separate element, so that four mutually dependent parts in the pail the bottom shape are movable.

In the earlier application D 45 528 are different Examples are given of how parts of a headstamp can be independently increased by different amounts can be moved until they come to rest against stationary stops on the side frame. On the documents this earlier application is referred to in this respect.

In Pig. 5 is next to the injection port 22 with the delay 23 also the subsequent injection channel 29 in Side frame shown. In the position shown for the injection of the material for the sole IJ is in alignment a hole Jo in the heel part 2ob of the rim 2o with the injection channels 22 and 29. After the heel part has been lowered 2ob the injection channel 22 or 29 is closed. In contrast, there is an injection channel located above Jl for injecting the material for the edge strip 14 is free.

Fig. 6 shows footwear and injection mold of this proposal in a further process stage, namely after the injection molding of the edge strip 14, with the Heel on the outer edge with a

109834/0002

H85636

Edge strips is provided. In addition, the lower, namely the running surfaces of the sole 13 and the heel 25 are provided with a covering } 2 made of compact material, so that practically outer surfaces of the sole 13 are covered with a homogeneous layer of plastic. To inject this sheath 32, the headstamp ΙίΊ is lowered again from the position shown in FIGS. This position is shown in FIG. The material for the cladding 32, as the edge strip lk injected 17 through injection channels 31 iin SeitenraliiMcm.

Fig. 7 shows a special proposal of the invention for forming a sheath covering the sole 13 on all free sides. Thereafter, the foam sole injected onto the shaft 10 is then immersed in an instilled mass of homogeneous material, in particular plastic, in such a way that a casing 33, corresponding to the depth of immersion, docks the sole 13. The shaft 10 is here by a cover 3'l ringshoitm g * »e * H * a% ^, cschii t / t ο Ditso Abd«> ckuii {, 3'lv (jlauit according to the contour lies last and vrrhd lnlor ί, Λί \ ΐ :, the material «Um l'nuiuui t ο lung 33« »« den;, ciiaif (litt. BAD OrV. u I HAL

109834/0002

Claims (1)

U85636 Expectations 1. Footwear with a multi-part sole made of elastic foam and molded onto a shoe upper, in particular ocliaur.ikuns t fabric, characterized in that the Foam existing directly on the upper part of the shoe (10) or injection-molded onto an insole (ll) connected to it Sole (13) along its outer edge all around by an edge strip (l4) molded onto the sole (13) made of solid, homogeneous, elastic material, in particular Plastic is covered. 2. Footwear according to claim 1, characterized in that the on the sole (13) injection-molded iiand strips (l4) laterally, however, the shaft (10) protrudes from the edge of the sole. 3. Footwear according to claim 1 and optionally claim 2, characterized in that the foam sole (13) is injected onto the entire lower surface (27) of the upper (10) or the insole (II) connected to the upper (IO) and that the edge strip (14) is injected into a circumferential recess (19) of the sole (13) in such a way that the edge strip (lk) is covered on its upper side with a preferably very thin layer of foam. 10983470002 H85636 ■ / - _Λ 'i. Footwear with multi-part Solilo anccioriiter to a shoe upper made of elastic Schaunistof Γ, in particular Sciiauiukuiiststof f, in particular; after einnin or 1 i.iehreren of claims to 3 characterized ^ -t j; l: emitseiciuie t, here, the sole (13) j at its outer edge and to the lower dvn, remote from font (LO) with a surface ^ cschlossenon Uiiiiiianteluiigi 32) made of solid, homogeneous ... 1, elastic material, in particular plastic, is surrounded. 5. Footwear according to claim 1 to 4, daclurcii ^ ekenn / .eiclmot, that between the connecting surfaces of the shaft (10) and optionally the insole (ll) with the molded on Foam sole (13) an adhesive (glue) is provided. 6. Footwear according to claim 1 to 5 _5, characterized in that the connecting surface of the shaft (lO) and / or optionally the insole (II) are roughened. 7. Footwear according to one or more of claims to 6, characterized in that egg is known per se Felt insert is provided, which lies in particular between the usual Zwickeinschläsen on the insole (II). BATH ORIGINAL 109834/0002 ι '. Verrnhren for the manufacture of footwear ^ email claim 1 and one or more of claims 2, 3 and 5 to 7 with a with a crosswise diode stamp, a fitting and a last for receiving the shoe sciiafti-s licstplienden injection mold, characterized, dnxj initially near the last Position of the bottom stamp (ll) is injected linterially to form the sole (I3) made of foam, then the bottom stamp is lowered to expand the sole to form pores and finally, after Viü-festigunji, the foam sole (13) is used for the injection mold Injection of the material for the edge strip (lA) or the Unir.iantelung (32) is expanded. 9. Modification of the method according to claim J., characterized in that the material for the sole (13) is injected with the headstamp (la) lowered in the position corresponding to the final 'sole thickness. 10. The method according to claim 8 and optionally claim 9 for the manufacture of footwear nahh claim ^ i, characterized gekennzeicluiet that the headstamp (18) after molding and foaming the sole (13) nchinals is lowered to accommodate the the sole (13) at the rear Area-reflecting sheathing (32) BATH 109834/0002 H85636 11. A method for producing footwear according to claim 4, characterized in that first a sole (I3) made of foam on the shaft (10) or on the insole (ll) is molded on, in particular injected, and then the sole (13) by dipping into a plasticized one Mass of homogeneous, non-foamed material, in particular plastic on the circumferential outer edge and on the rear surfaces (27) of the sole (13) with the homogeneous casing (33) is provided. 12. Apparatus for producing footwear according to claim 1 and optionally one or more of claims 2 to 7 and for performing the method according to claims ο to 10 consisting of a displaceable liodenstenipel 44 <* 4 , a preferably two-part side frame and one on the Lateral, lowerable last for receiving the shoe upper 4-49 ^, characterized by a separately movable rim (20) that surrounds the headstamp and is as thick as the hand strip (14), which during the injection of the material for the sole of the inner surface laterally limited and can be lowered after the sole (13) has solidified, in such a way that there is a space running all around for receiving the material for the edge strip (14). 109834/0002 bath U85636 -J - αϊ Device according to claim 12, characterized in that the material for the sole (13) has an injection channel running in the side frame with a connection channel in the mandrel stamp (Io) and branches (23) which end in the sole surface of the bottom stamp (18) and the material for the strip of land (lk) is injected through a channel that only runs in the side frame. lk . Device according to claims 12 and 13, characterized in that the rim (20) is divided to produce a continuous sole (13) with heel (25) »which is thicker than the sole, in such a way that / a heel part surrounding the heel ( 20b) of the rim (20) can be lowered independently of a sole part (20a) surrounding the rest of the sole. Device according to claim 1 , characterized in that for the production of a sole (13) with a stepped shoulder (25) with a homogeneous casing (32) also on the side surface of the shoulder (25) facing the sole joint (26) a transverse A web (28) extending over the sole (13), in particular connected to the formations of the sole part of the rim (20), is provided. 109834/0002 l6. Device according to claim 15, characterized in that that the web (2u) with a different length of the sole (13) and the surface (2?) Of the heel (25) facing the sole joint (2b) as a separate part of the rim (20) can be reduced by the required amount. 17 · Device according to one or more of Claims 12 to Ib for the production of footwear according to Claim 3> characterized in that the rim (20) has a smaller Height has than the thickness of the sole (l3) and in the injection position the sole is at a distance below the shaft (10). TfO. Device according to claim 17, characterized in that that the ring (20) in the injection position a slight distance from one through the recess (19) has sealing lip (21) formed in the side frame. For the applicant's Patenta Bremen, April 23, 1965 ^.; _v '.-; . re π "» ^{e Λ} Send to "... Tel. 302 172 J ₁ ^ g S'evo ^ .ob; Desma-Werke GmbH.
Ue se η b. Br a
Desmastrasse 112 BATH 109834/0002