FR2664476A1 - BONBOUT OF A SHOE HEEL AND ITS MANUFACTURING METHOD. - Google Patents

Abstract

The tip (1) comprises a wear element (2) of plastic material and a textile sheet (3) fixedly attached to one face of the wear element (2) and intended to serve as a connecting element for fixing by gluing the tip to the heel of the shoe.

Description

The present invention relates to a bonbout of a heel

  shoe and its manufacturing process.

  In general, a shoe comprises a top or an upper, a bottom consisting of a sole and a heel fixed to the latter by gluing or nailing. The heel of the shoe comes into contact with the ground via a bonbout which constitutes a protective element of the heel. The bonbout is most often made of

  rubber fixed to the heel by gluing or nailing.

  In the case of fixing the bonbout to the heel by gluing, experience shows that the conventional glues used by shoe manufacturers do not provide perfect adhesion Under these conditions, the bonbout which constitutes a protective element with progressive wear can take off from the heel when it has not yet reached a sufficient degree of wear

its replacement.

  It is obvious that an obvious solution to overcome this drawback would be to use suitable glues to fix the bonbout to the heel, but these

  glues are relatively expensive.

  The object of the invention is to provide another solution to the aforementioned problem while providing other advantages without increasing the cost of

manufacture of candies.

  To this end, the invention provides a bonbout of a shoe heel which is characterized in that it consists of a plastic wear element molded, and a textile sheet fixedly attached to one side of the wear element and intended to serve as a connecting element for fixing by gluing the

heel bonbout.

  According to another characteristic of the bonbout according to the invention, the textile sheet is fixed to the bonbout during the operation of molding the wear element in

plastic material.

  Generally, the textile sheet is a woven or knitted fabric, or a fiber felt sheet, the material used being natural, artificial or synthetic. The invention also provides a method of manufacturing the bonbout having the aforementioned structure, which method consists in producing the wear element by injecting the plastic material into a mold with high

  pressure in the presence of the textile sheet.

  To improve the adhesion between the plastic and the textile, the method also provides for a preliminary operation of pre-gluing the sheet of

textile.

  Among the advantages provided by a bonbout in accordance with the invention, it should be mentioned in particular: better resistance to wear of the plastic material, this material such as polyurethane having not been used until now in the field of repair of shoes for grip issues with conventional adhesives, and good adhesion to the heel of the shoe with inexpensive conventional adhesives thanks to the presence of

the sheet of fabric.

  In addition, the face of the bonbout which bears on the ground most often has a leather insert attached by gluing and, according to another characteristic of the invention, this insert is fixed to the wear element of the bonbout during injection molding, which provides better adhesion and eliminates

  flatness defects between the wear element and the insert.

  Other advantages, features and details of

  the invention will emerge from the explanatory description

  which follows, made with reference to the appended drawings given solely by way of example and in which: FIG. 1 is a perspective view of a bonbout according to the invention, FIG. 2 is a sectional view along line II -II of Figure 1, and Figure 3 is a bottom view of the bonbout

shown in Figure 1.

  Referring to Figures 1 and 2, a bonbout 1 of a shoe heel comprises a wear element 2 of plastic and a textile sheet 3 of fabric for example fixedly attached to one face of the wear element 2 The fabric sheet 3 advantageously serves as a connecting element for fixing the bonbout i on the heel T (shown diagrammatically in dotted lines in FIG. 2) of a shoe. This fixing operation is

  made with inexpensive classic glues.

  According to a first embodiment, the wear element 2 has come from molding and the fabric sheet 3 is then fixed by simple bonding to the element

wear 2.

  The wear element 2 is a generally semicircular planar element with a substantially straight end surface 2 a and an end surface

curve 2 b.

  According to a second preferred embodiment of the invention, the wear element 2 is produced in a mold with high pressure injection of the plastic material in a pasty state and at a certain temperature, the fabric sheet 3 being advantageously placed at

inside the mold.

  Following the cooling phase, the sheet

  of fabric 3 adheres perfectly to the plastic.

  To improve this adhesion, the fabric sheet 3 is preliminary pre-glued, the glue softening on contact with the plastic. In general, the underside of the bonbout

  1 intended to rest on the ground has an insert 4.

  More specifically, on the underside of the wear element 2, there is provided a recess 5 of a height b, which constitutes a housing in which is housed the insert 4 such as a flat element made of leather for example of thickness h and having substantially the same dimensions

than the aforementioned accommodation.

  As a general rule, care must be taken over the finish of the insert 4 Indeed, once fixed by gluing in the housing of the wear element 2, it does not always come flush with the wear element 2

  if its thickness h is not constant.

  In a second embodiment described below, it is possible, on the one hand, to improve the adhesion of the fabric sheet 3 to the wear element 2 and, on the other hand, to overcome the failure to outcrop

insert 4.

  In this case, the manufacture of the bonbout 1 consists in producing the wear element 2 by injecting the plastic material into a high pressure mold in the presence of the fabric sheet 3 which has dimensions such that it slightly overflows from the imprint so as to be wedged at its periphery between the two blocks of the

mold at the time of molding.

  Advantageously, the fabric sheet 3 is pre-glued to improve adhesion. The insert 4 is placed flat inside the mold parallel to the fabric sheet 3, and this results in perfect flatness with the wear element. 2 In addition, when this insert 4 is made of leather, the fact that it is hot pressed in the mold makes it more solid. Of course, the invention is not limited to the embodiments given above and it includes all the technical equivalents of the means described. In particular, the plastic used is not exclusively polyurethane, but it generally enters in the family of

thermoplastic materials.

Claims (10)

  1. Bonbout of a shoe heel, characterized in that it consists of a wear element (2) made of plastic material molded, and a textile sheet (3) fixedly attached to one side wear element (2) and intended to serve as a connecting element   for fixing by gluing the bonbout to the heel.   2. Bonbout according to claim 1, characterized in that the textile sheet (3) is fixed to the element wear (2) by gluing.   3 Bonbout according to claim 1, characterized in that the plastic material is a thermoplastic material, and in that the textile sheet is a woven or knitted fabric, or a fiber felt sheet, said sheet being natural, artificial or synthetic.   4. Bonbout according to any one of claims   1 to 3, characterized in that the other side of the element   wear (2) has an insert (4) in leather for example.   5. Bonbout according to claim 4, characterized in that the insert (4) is fixed to the wear element (2) by collage.   6. Bonbout according to claim 3, characterized in that an insert (4) in leather for example is fixed on the other face of the wear element (2) during   the latter's molding operation.   7. Method of manufacturing a bonbout such as   defined by any of the claims   above, characterized in that it consists in producing the wear element (2) by injecting the plastic material into a high pressure mold in the presence of the textile sheet (3).   8. The manufacturing method according to claim 7, characterized in that it consists in pre-gluing the textile sheet (3) before it is placed in the mold. 9. The manufacturing method according to claim 7 or 8, characterized in that it consists in attaching an insert (4) of leather for example on the other face of the wear element (2> during the operation molding this last.   10. Heel shoe, characterized in that the heel bonbout conforms to any one of claims 1 to 6.