DE2106984A1 - Process for the manufacture of shoes and lasts to be used in the process - Google Patents

Description

N.V. RUBBER? A3RIEK VREDEGTBIK, The Hague (Hague) Holland

Process for the manufacture of shoes and lasts to be used in the process

The invention relates to shoes, the upper of which is placed on a last during the manufacture of the shoes, whereupon the outsole material is attached to the upper edge by means of a mold. The raw material door the outsole is preferably liquid, although rubber or other non-liquid raw materials such as polyvinyl chloride, konxnen into consideration. If necessary, a blowing agent can be added to the barrel material.

The form is completely or partially covered with the sole material has been grooved, this material will go through Reaction, gelation, cooling or vulcanization

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harden and bond to the edge of the socket.

In a known method for? the production of such Corded shafts are used for shoes, with a rope stitched onto the edge of the shaft and the edge of the shaft using this sail over the last is pulled. In another method, the upper is provided with a quilted sole and, if necessary with the inside on the outside Moldings attached. In the two known methods, the last is then placed on a porin; so that the sole shape the Ockaftrand on the whole circumference of the sole concludes.

With all shoes made by this process When the shoes are used, the connection between the outsole and the shaft is exposed to high loads, especially due to sudden © stress on the outsole when walking.

In the case of the known methods, attempts have already been made the resistance of the shoes to such stresses by increasing the f.chaftrand with hanging loops of thread to increase the strength to improve the connection with the sole material. For this purpose, perforations were made in the shaft wall to create the adhesive surface on the edge of the shaft through the palms of the hands enlarge the perforations of the shaft material lying close to the groin, a weakening of the shaft edge was accepted.

The use of Terachiedener species today on the

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Harkt artificial leather in shoes bit a molded outsole also brings with it the connection the edge of the shaft with the outsole material has special problems. Only this synthetic leather is in In some cases it is provided with a smooth surface to which the outsole material does not adhere well, but rather in many cases the outer layer of the artificial leather is not sufficiently strong with the supporting textile layer connected, which gives the artificial leather its strength. On the other hand, it turned out that Synthetic leather is often more difficult in comparison to old leather adapts to the foot, which leads to increased lateral stresses on the shaft edge and its connection bit the outsole can lead.

To overcome these difficulties, the invention is used for the production of shoes with molded outer soles proposed a method which is characterized in that the shaft edge over its entire length or part of its length in the longitudinal direction on a protruding on the circumference of the sole side of the last, including a cavity in the sole of the foot Tape is pulled past, with the shaft edge partially exposed in the width direction near the cavity, so that the outsole material barely introduced into the enclosed by the last and the walls of the fora adheres to both sides of the saphenous margin.

When using a corded shaft and a tubular shape * that surrounds the edge of the shaft, the Outsole material adhere to both the back and the front of the sehaftrand and in this

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Veise su a considerable increase in the strength of the Lead the connection between the shaft edge and the outsole material. At the same time, when using the procedure According to the invention, the Gehaftrand lie approximately in the middle of the thickness of the outsole is favorable in terms of power transmission.

The same improvement in the connection between the shaft edge and outsole material can be achieved, though the inventive method for shafts with the Quilted soles connected to the upper edge are used. The stitching allows liquid outsole material in sufficient cheese. The quilted sole can also be provided with perforations which the outsole material can reach through the hollow in the last to the rear of the shaft edge. Perforations can also be made in the shaft edge, possibly in combination with perforations in the quilted one Sole, may be provided, the aforementioned weakening of the upper edge wholly or partially by the enlargement of the adhesive surface of the outsole material on the Inside of the shaft edge is balanced. When using rubber or other non-liquid raw materials In the case of a quilted sole, it is advisable to do this before the upper is placed on the last To bring basic material into the cavity, so that it narrows during the vulcanization via the perforations with the material inside the mold can. It is sufficient to supply liquid material by an opening in the fora when used Partial filling comes into consideration for a blowing agent.

Of course, the feed of the raw material

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materials can also be done in two ways «namely through the groin, to the cavity and through an opening in der Fora * In this case, perforations may not be necessary, which is also the case with »Insertion of rubber is possible.

Finally, according to the invention, the cavity in the last can also be used to clamp an inner sole that rests against the bottom of the cavity, in the case of using a quilted sole this takes on the character of a midsole. Here you get all the advantages of glue-tight high quality shoes, because with this process a glue-pinched shoes equivalent firm connection between the inner Johle and the shaft edge comes about.

With reference to the drawing, the invention described below.

Xn the drawing is!

Fig. 1 is a vertical cross section through the strips used in the method old one Hollowing out;

Fig. 2 is a side view of the last, at dea the cavity extends only part of the length of the last;

3 shows part of a vertical section

the last of the upper and the quilted sole as well as the fora for the shaping of the Outsole;

Fig. 4 is part of a vertical cross section the last old corded shaft and manufactured outsole;

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Fig. 5 a «. Part of a vertical cross-section

of the last with shaft, quilted sole and in the hollow of the last inside sole, the whole thing provided with an outsole; and

6 shows a cell of a vertical cross section

dös last with cord-bound, old an outsole provided shaft and in the The inner plank is hollowed out.

The last 1 is in its sole side with a cavity 2, which is enclosed by a band 3 protruding at the periphery. Oils cavity 2 can see Can extend over the entire length of the last but also limited to the front part of the last according to Fig. 2 *

According to FIGS. 3-6, the shoe upper * is sucked over the last 1 in such a way that the upper edge 3 of the upper rests on the band 3 and extends beyond it. Fig. 5 "shows" the shape consisting of the edge plates 6 and the base plate 7 for the strips 1 "

In the embodiments according to FIGS. 3 and 5, the upper edge 5 is connected to a quilted sole 9 by a stitched seam 8. The embodiment according to FIG. 5 differs from that according to FIG. 3 in that there is an inner sole 10 which was previously clamped into the cavity 2.

Bank of the fact that the shaft edge 5 extends over the Belt 3 extends out, the material of the running

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Sole 11 both on the front side and on the exposed part of the rear side of the upper edge 5 be liable. When using a thinly liquid base material as the outsole material, the stitching seam 8 is sufficient as a passage for the material flowing into the mold 6, 7 via an opening. For this purpose you can but also perforations (not shown) are used, which are attached in the upper edge 5, the quilted sole 9 or in both. That which flows in a liquid state Outsole material will depending on the time after some time the nature of the material, harden through reaction, gelation or cooling in Fora 6, 7 · Venn Guam! or another non-liquid base material than Running gear is used before the shaft 4 is placed on the last, a sufficient amount of material or raw material in the cavity 2 to be introduced so that this material is calibrated at the perforations with the one in the during vulcanization Form 6, 7 can combine material.

In the embodiments according to Figures 1 and 6 the quilted sole 9 * is missing, in the place of which a surface edge 12 bound by an artificial cord is used. The «form according to FIG. 6 differs from that according to FIG. 4 in the presence of a cavity 2 pinched inner sole 10 · Also with these design shapes the rear of the shaft edge is embedded in the outsole material, as this material easily reach the rear side of the shaft edge 5 around the edge 12 that has been tightened with the cord can.

The agreement «wipe the old of the inner soul

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le 10 provided versions (fig · 5 and 6) and Glue-wrapped shoes are clearly recognizable. Of the The only difference is that the conductive layer is between the inner sole and the upper edge is slightly thicker than with shoes that are pinched in the knee, which, by the way, can be achieved by a correct choice of the depth of the cavity 2 and the thickness of the inner sole 10 can regulate.

Finally it should be mentioned that the outsole material 11 from scwei jets, i.e. both through an opening in the ion 6, 7 and through the ledge 1 can be used if a quilted sole 9 is used. If necessary, there are then perforations in the end formed by the quilted sole 9 is not necessary.

The inner sole 10 in FIG. 5 should, however, be provided with one or more perforations.

The invention is not restricted to the embodiments described and shown, but rather encompasses it also all variants lying within the scope of the concept of the invention.

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Claims (5)

Expectations MJ Process for the production of shoes in which at a shaft attached to a last is molded onto an outsole by means of a mold, characterized in that, that the shaft edge (5) over its entire length or part of its length in the longitudinal direction one protruding on the circumference of the sole side of the last, enclosing a cavity (2) in the sole side of the foot Hand (3) is pulled past, with the edge of the shaft in the width direction near the cavity partially is exposed, so that it is brought into the space enclosed by the strips and the walls of the mold (6, 7) Outsole material (11) on both sides of the The edge of the shaft adheres. 2. The method of claim 1, wherein the on the last attached shaft is provided with a quilted Oohle, which is connected to the shaft edge, thereby characterized in that the outsole material both in the cavity (2) of the last (1) and in the Porm (6, 7) is introduced. 3. The method of claim 1, wherein the on the last attached shaft with a quilted sole 109836/0177 AO is provided, which is connected to the shaft edge, thereby characterized in that the outsole material is made of the shape through perforations in the through the quilted Sole completed cavity is guided. 4-, method according to one of the preceding claims, characterized in that in the hollow of the lei «· atens an inner sole is arranged. 5. Last, characterized in that an a & scope of the TaSsöhlseite of the last excellent hand (3) Spread over the goose or part of the length of the Last extends and includes a cavity (2). 109836/0177