JPS5834123B2 - How to make slash shoes - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a method of manufacturing a slash shoe in which a flat heel is integrally formed.

When manufacturing shoes by the slush molding method, after forming a semi-gelled layer of shoe material paste along the inner surface of the shoe mold, the heel material paste is injected into the heel part of the shoe mold, and then... A method of integrally molding a shoe with a heel by heating a shoe mold to melt and gel the paste is well known.

By the way, as shown in FIG. 1A, the heel part of the shoe mold 2 on which the semi-gelled layer 1 of the shoe material paste has been formed is filled with the heel material paste 3 in one injection, and then the heel material paste 3 is poured in L. When the paste is melted and gelled, the surface of the gelled layer 4 bulges into a raised shape due to the expansion of the paste and solidifies, as shown in the opening in FIG.

Conventionally, lining fabric and insole material were laid and glued onto such a mid-high heel, and the adhesive was limited to a small area in the center, resulting in weak adhesive strength, and the lining fabric When the insole material is subjected to force from above, it tilts along the curved surface of the heel, straining the adhesive part and making it easy to peel off, and furthermore, the central convex part of the heel hits the heel of the wearer's foot. It had the disadvantage that it was extremely uncomfortable to wear.

In particular, when using materials that foam as heel materials, such as pastes foamed by chemical foaming agents or gas mixtures, or materials containing fine hollow particles, such as foamed urethane resin, the center of the heel becomes large. In order to climb up, the central raised part of the heel had to be scraped off after molding, which required a very troublesome process.

The present invention solves the above-mentioned problems, and after forming a semi-gelled layer of shoe material paste on the inner surface of a shoe mold, it is applied to the heel portion of the shoe mold in at least two or more times. material,
For example, paste is characterized by injecting and filling a foamable resin, melting and gelling the heel material or foaming and solidifying it with each injection, and integrally molding a shoe with a flat heel on the top surface. It is something to do.

An embodiment of the present invention will be described below with reference to the drawings.

As shown in FIG. 2A, a fixed amount of the shoe material paste 12 is filled into the shoe mold 11.

Next, as shown in FIG. 2, the paste 12 is passed through the heating chamber 13, and heated from the outside to semi-gelatize the paste 12 inside, and then, as shown in FIG. 11 is turned over and the non-gelled paste 12 filled inside is discharged.

Thereafter, as shown in FIG. 2, the heel material paste 14 is first injected into the heel portion of the shoe mold 11.The semi-gelled layer 12a of the shoe material paste and the heel material paste 14 are passed through the heating chamber 15. (FIG. 2E) Subsequently, the heel material paste 14' is injected a second time as shown in FIG.
6 to melt and gel the paste 14';
After cooling this (FIG. 2H), the skin 17 of the gelled layer solidified within the shoe mold 11 is taken out to obtain a shoe body 19 integrally provided with a heel portion 18 as shown in FIG.

In the above process, Figure 4A shows the first injection, and the first injection amount of the heel material paste 14 is such that the highest level that rises due to heating is reduced to below the required level. The more effective the dog is, the more effective the dog is.

When the shoe mold 11 is heated to melt and gel at the next temperature L, the paste 14 expands and solidifies with the upper surface having a medium height shape as shown in the opening in FIG. When the paste 14' is additionally injected into the heel part of the shoe mold 11 in the second injection step onto the layer 14a, the periphery of the heel part is filled more than the center part, so it is melted. When the paste 14' is gelled, the paste 14' expands and becomes bulky around the heel part and solidified, and the gelled layer 14b has a flat surface as a whole with the upper surface of the heel part having a high circumference and a concave center. becomes.

In the above embodiments, an example has been described in which the heel material paste is injected twice, but it is of course possible to inject the heel material paste in three or more times.

Although the accuracy of the groove surface smoothness can be increased by increasing the number of injections, two injections are practically sufficient.

Although paste was used as the heel material in the above embodiments, other foamed urethane resins may also be used.

In the case of foamed urethane resin, it is two-component, and after mixing,
When injected into the heel, it foams and solidifies with its own reaction heat without heating, so heating is not required each time it is injected as a heel material.

By forming a recess in the center of the heel as shown in the embodiment, the lining fabric and the midsole material can be stably held, and the comfort can be improved by fitting the heel of the foot.

As described above, the present invention injects the heel material into the shoe mold in two or more times, and melts and gels the heel material or foams and solidifies the heel material at each injection, so that the heel material protrudes due to expansion. By eliminating the unevenness of the heel, a flat upper heel part can be obtained, and the adhesion between the heel part, lining fabric, and insole material can be improved, and comfortable L-shoes can be obtained, unlike the conventional method. Since there is no need to remove the central raised portion on the upper surface of the heel, the manufacturing process can be simplified and materials can be saved.

Therefore, according to the present invention, when a foam or a fine hollow body containing air bubbles is used as a filler in the heel material, a remarkable effect can be exhibited, and lightweight and comfortable slash shoes can be produced. It has the effect that can be obtained.

Further, according to the present invention, a foam or a fine hollow body containing air bubbles is used as a filler in the heel material that is first injected.
・The heel material injected last does not contain these.
By using the material, it is lightweight and the adhesion to the lining fabric and the midsole material can be further improved.

[Brief explanation of the drawing]

Figure 1A is an explanatory diagram showing the process of forming the heel of a conventional slash shoe; Figures 2A to 1C are explanatory diagrams showing the manufacturing process of the slash shoe of the present invention; FIG. 4 is an enlarged sectional view of the resulting slash shoe, and FIG. 4 is an explanatory view of the heel forming process. 11...Shoe mold, 12...Shoe material paste, 14.
... heel material pace), 14a, 14b ... keratinized layer, 18 ... heel material, 19 ... - @ pot body.

Claims (1)

[Claims] 1. In the shoe molding process using the slush molding method, after forming a semi-gelled layer of shoe material paste on the inner surface of a shoe mold, the heel material is applied to the heel portion of the shoe mold at least twice or more. A method for manufacturing slash shoes, characterized by injecting and filling the heel material, and melting and gelling or foaming and solidifying the heel material at each injection.