JP2857182B2 - Method of manufacturing slash shoes - Google Patents

Description

The present invention relates to a method for manufacturing slash shoes.

[Conventional technology]

As one of the manufacturing methods of synthetic resin shoes, a manufacturing method by slash molding is known. The method of manufacturing shoes by slash molding is widely used in the manufacture of various shoes because of the method by which shoes can be mass-produced at low cost.

Conventional slash-molded shoe structures are generally
As shown in the figure, a shoe skin 11, a lining material 12, and an insole 13
It consists of.

As a method for producing this type of shoe, the shoe outer skin 11 is formed by integral molding by slash molding using a vinyl chloride resin for plastisol. And the shoe skin 11 and the lining material 12
A method is known in which the shoe 15 is formed by fixing the sewn portion at the upper and lower sewn portions 14 of the shoe by sewing, and then bonding the inner sole 13.

[Problems to be solved by the invention]

Conventionally, as shown in FIG. 3 (a), in the case of shoes having a high cover such as boots, the slash-forming method of the above-mentioned slash forming method is effective even if the lining material 12 is loosened at a portion close to the contact surface of the cover. Because it was hard to see from the outside, it did not matter much.

However, as shown in FIG. 3 (b), when boots with a low shell are manufactured by the same manufacturing method, the slack of the lining material 12 is visible from the outside because the shell is low, and the product image is degraded. There was a problem to say.

Also, shoes made by slash molding require thickening of the outer skin of the shoe in order to give a three-dimensional appearance to the surface, and the weight of the shoe itself becomes heavy. There was a drawback that it was uncomfortable.

Further, when the thickness of the outer skin is increased in order to increase the hardness of the upper, the weight of the shoe itself also becomes heavy, and the same problem as described above occurs.

The present invention solves the above-mentioned drawbacks of the prior art, and eliminates the slack of the lining portion on the inner surface of the shoe outer skin, has a product image excellent in appearance, and furthermore, provides a method for producing a lightweight and comfortable slash shoe. It is intended to provide.

[Means for solving the problem]

The present invention provides an adhesive layer made of a hot-melt type adhesive having a melting point of 80 ° C. to 130 ° C. on at least the outer side of the hood covering the opening from the mouth opening of the lining to the grounding surface. From the slash-molded shoe skin,
A method for manufacturing a slash shoe, characterized in that a lining adhesive layer is heated to soften and melt the adhesive, and the lining and the shoe outer skin are integrated by bonding.

Hereinafter, the present invention will be described in detail with reference to the drawings. First
As shown in the figure, the shoe outer skin 1 is manufactured in advance by known slash molding. On the other hand, as shown in FIG. 2, an adhesive layer 7 made of a hot-melt type adhesive is provided on at least a cover 6 extending from the mouth opening 4 of the lining 3 to the ground plane 5. Lining 3 provided with
Hang it on. Next, the shoe outer skin 1 manufactured by the slash molding is suspended from above the lining 3, and the shoe outer skin 1 is put on the adhesive layer 7 made of the hot melt type adhesive of the lining 3. The hot melt type adhesive is heated and softened by heating the adhesive layer 7, and the lining 3 and the shoe outer skin 1 are pressed and integrated. After the crimping is completed, the slash shoes are removed from the last to obtain slash shoes.

The method for producing the shoe outer skin 1 by slash molding is as follows.
The desired shoe is made from genuine leather and used as a shoe prototype. In order to obtain a fine and dense leather pattern on the surface of the shoe prototype, a mold is formed by electroforming. The shoe prototype is formed into a conductor by a silver mirror method, a vacuum evaporation method, or the like, and then immersed in an electroforming solution in which nickel, an alloy, or the like is dissolved, and an electric current is applied to perform electroforming. Then, by separating from the shoe prototype, a hollow mold having a fine and dense surface design is obtained on the hollow inner surface, similarly to the surface of genuine leather shoes.

After injecting vinyl chloride plastisol into this hollow mold and heating it to a temperature of 100 to 300 ° C., the sol is semi-gelled from the contact portion with the metal mold and grown to a predetermined thickness.
The ungelled sol inside is discharged, and the remaining semi-gelled layer is further heated, completely gelled, and then cooled to obtain the shoe outer skin 1 having the same shape as the original.

The last 2 is used as a support base for bonding with a foot-shaped mold, and a heating device can be incorporated inside.

The lining 3 is made of natural leather such as cowskin, horseskin, and pigskin, or a general fabric such as a knitted fabric, a woven fabric, or a nonwoven fabric. These materials are formed into a last using a method such as sewing or heat fusion.

The adhesive layer 7 is provided using a hot-melt type adhesive. A material obtained by laminating a hot-melt film on a lining material or a material coated with a hot-melt adhesive in advance is used as a raw material, and the lining 3 is manufactured using the raw material. The portion where the adhesive layer 7 is provided on the lining 3 is at least a portion extending from the foot opening 4 of the upper cover 6 to the ground surface 5. In order to further improve the integrity, a hot melt adhesive may be provided on the entire surface of the lining 3 to form the adhesive layer 7. The bonding method is as follows. The lining 3 is hung on the heated last 2 and, while the hot melt is in a dry state in which the hot melt is not softened and melted, the shoe outer skin 1 is covered. Glue.

As a heating method for melting the hot melt, an internal heating method of heating the last 2 with an electric heater, a high-frequency heating method, an external heating method of heating in an oven, or the like is used.

As the material of the adhesive, a material having an adhesive property to both materials of the shoe outer skin 1 and the lining 3 can be used.
Polyester and EVA hot melt adhesives are used. Preferably, polyester-based melting point 90 ° C
An adhesive at ~ 120 ° C is desirable.

An air bag method, a liquid pressure bonding method, or the like that presses the entire shoe evenly is used as a pressure bonding method for bonding the shoe outer skin 1 and the lining 2 more firmly.

〔Example〕

 Hereinafter, the present invention will be described in more detail with reference to examples.

A lining was manufactured using a polyester nonwoven fabric containing hot melt fibers as a material, and a polyester hot melt adhesive was applied to the entire surface of the lining to provide an adhesive layer.

The last was heated to 90 to 95 ° C., the lining provided with the adhesive layer was hung on the last, and the shoe skin was immediately hung over the lining.

The heated state was maintained for 2 minutes to melt the hot melt adhesive, and then pressure-bonded from outside the outer skin by an air bag method.

Next, use a cooling blower to blow cold air from outside
After spraying for a minute and cooling, it was removed from the last to obtain shoes.

[Effects of the Invention] As described above, the method for manufacturing a slash shoe of the present invention is such that the shoe outer skin and the lining are directly bonded, so that the problem of slackening of the lining which has been conventionally seen can be solved,
A shoe having an excellent product image without appearance defects can be obtained.

Further, even if the outer shell of the shoe is made thinner, sufficient hardness of the upper can be obtained, so that the shoe itself can be reduced in weight, and a slash shoe having excellent comfort can be obtained.

Furthermore, the method for producing a slash shoe of the present invention uses an adhesive layer made of a hot-melt adhesive having a melting point of 80 ° C. to 130 ° C. as an adhesive layer. There are many advantages as compared with the case where a solvent-based or water-based adhesive is used. That is, when a solvent-based or water-based adhesive is used, since the solvent or the like is in a volatile state, that is, when it is in a dry state, adhesiveness is not exhibited, and the adhesive layer is wet or semi-dry. In such a state, it is necessary to perform a work of covering the shoe lining on the lining. On the other hand, in the method using the hot melt type adhesive of the present invention, it is possible to perform the work of covering the shoe lining on the lining in a state where the adhesive is dry, and to cover the bonding surfaces of the shoe hull and the lining with each other. There is a great merit in the work of integrating through the process of shearing up to the associated fixed position. When the shoe lining is put on the lining, the hot-melt type adhesive does not develop adhesiveness unless it is melted, so it is easy to correct the position when putting it on, whereas solvent-based or water-based adhesives, After application, the adhesiveness is developed due to the evaporation or infiltration of the solvent or water, so that it is difficult to cover or modify the adhesive. In addition, since the hot-melt adhesive is used, the work of applying the adhesive by spraying, brushing, coater or the like on the lining becomes unnecessary, and the working process is shortened. Further, the hot-melt adhesive has an effect of preventing the adhesive from being stained, and can provide high-quality slash shoes.

[Brief description of the drawings]

FIG. 1 is a perspective view of a shoe of the present invention, FIG. 2 is an explanatory view of a method of manufacturing a shoe of the present invention, and FIG. 3 is a cross-sectional view of a shoe according to a conventional manufacturing method. DESCRIPTION OF SYMBOLS 1 ... Shoe outer skin 2 ... Last 3 ... Lining 4 ... Slip opening 5 ... Grounding surface 6 ... Screw cover 7 ... Adhesive layer made of hot melt type adhesive

Claims (1)

(57) [Claims] An adhesive layer made of a hot-melt type adhesive having a melting point of 80 ° C. to 130 ° C. is provided at least on the outer side of the hood covering from the foot opening of the lining to the grounding surface of the lining. Put on the shoe skin by slash molding from above,
A method for manufacturing a slash shoe, comprising: heating an adhesive layer of a lining to soften and melt the adhesive; and bonding the lining and a shoe outer skin by bonding.