JPS5875501A - Production of slash shoes - Google Patents

Abstract

(57) [Summary] This bulletin contains application data before electronic filing, so abstract data is not recorded.

Description

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

When manufacturing shoes by the slab shmold method, after forming a semi-gelled layer of sheath material paste along the inner surface of the shoe mold, heel material paste (1) is injected into the heel part of the shoe mold, and then A method of integrally molding a shoe with a heel portion by heating a shoe mold to melt and gel the paste is well known.

By the way, as shown in FIG. 1(a), the heel part of the shoe mold 2 on which the semi-gelled layer 1 of sheath material paste has been formed is filled with heel material paste 3 by one injection, and then this is poured. When melted and gelled, the gelled layer 4 becomes as shown in FIG.
As shown in Figure 2, due to the expansion of the paste, the human blood rises up into a medium-high shape and solidifies.

Conventionally, lining fabric and insole material were laid down and adhered to such a mid-high heel, but the adhesive area was limited to a small area in the center, resulting in weak adhesive strength. When the material is subjected to force from above, it slopes along the curved surface of the heel, straining the bonded area and making it easy to peel off.Furthermore, the central protrusion of the heel hits the heel of the wearer's foot, making it extremely difficult to wear. The downside was that it was uncomfortable. In particular, when a material that foams as a heel material, such as a paste that foams with a chemical foaming agent or gas mixture, a material that contains fine hollow particles, or a foamed urethane resin, the center of the heel may swell up significantly. Therefore, the central raised part of the heel must be removed after molding.

However, the processing required a very troublesome effort.

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, it is characterized by injecting paste or foaming resin, melting and gelling or foaming and solidifying the heel material each time it is injected, and integrally molding a shoe with a heel portion with a flat upper surface. be. An embodiment of the present invention will be described below with reference to the drawings.

In FIG. 2(a), a fixed amount of shoe material paste 12 is filled into the shoe mold 11. Next, as shown in FIG. 2(b), the paste 12 inside is passed through the heating chamber 16 and heated from the outside to semi-gelatize the paste 12 inside, and then, as shown in FIG. 2(c), the shoe metal is The mold 11 is inverted and the ungelled 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, and the semi-gelled layer 12a of the shoe material paste and the heel material paste 14 are poured into the heating chamber 15. Melt and gel (Figure 2 (e)). Continue to apply heel material paste 1 as shown in Figure 2 (f).
4' is heated in the heating chamber 16 shown in FIG. 2(G) to melt and gel the paste 14"i, and after cooling it (FIG. 2(G)), The skin 17 of the gelled layer solidified within the shoe mold 11 is removed to obtain a shoe body 19 integrally provided with a heel portion 18 as shown in FIG.

In the above process, Fig. 4 (a) shows the first injection, and the amount of heel material paste 14 injected in the first injection is such that the highest level that rises due to heating is reduced to below the required level. It is more effective to have as many as possible within the range.

Next, when the shoe mold 11 is heated to melt and gel, the paste 14 expands and solidifies with the upper surface having a raised shape as shown in FIG. In the second injection process, when the paste 14'-i is additionally injected into the heel part of the shoe mold 11 until a certain amount is reached, the periphery of the heel part is filled in a larger amount than the central part, so this is melted and gelled. As the paste 14' expands, the periphery of the heel portion becomes bulky and solidified, and the gelled layer 14b has an overall flat surface with a high periphery and a concave center on the upper surface of the heel portion.

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. Number of injections (The higher the number, the more accurate the surface smoothness can be, but two injections are actually sufficient. In the above example, Pace) 1 was used as the heel material, but other foamed urethane resins were also used. Can 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 example below, it is possible to stably hold the lining fabric and the insole material, and it is also possible to improve the comfort of wearing by making it conform to 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. It is possible to obtain a heel part with a flat upper surface by eliminating the unevenness of Since there is no need to remove the central raised portion, 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 the slug 7 is lightweight and comfortable to wear.
It has the effect of making you feel better about your shoes. Further, according to the present invention, by using a foam or a fine hollow body containing air bubbles as a filler in the heel material injected first, and using a material that does not contain these in the heel material injected last, It is lightweight and has improved adhesion to the lining fabric and midsole material.

[Brief explanation of drawings]

FIGS. 1(A) and 1(B) are explanatory views showing the conventional sludge-shoe heel molding process, FIGS. 2(A) to (G) are explanatory views showing the manufacturing process of the sludge shoes of the present invention, and FIGS. Figure 5 is an enlarged cross-sectional view of sludge gourd shoes obtained by the method of the present invention.
Figures (a) to (a) are explanatory diagrams of the heel portion forming process. 11... Shoe mold 12... Sheath material paste 14.
...heel material base) 14a, 14b...gelled layer 18...heel material 19...shoe body patent applicant Kokoku Chemical Industry Co., Ltd. Virco Co., Ltd. (a) (b) (b) (c) 7 (b) (d)

Claims (1)

[Claims] (1) In the shoe molding process using the slab shmold method, after forming a semi-gelled layer of sheath material paste on the inner surface of the shoe mold, the heel portion of the shoe mold is divided at least twice. 1. A method for manufacturing slush shoes, characterized in that the heel material -+' is injected and filled, and the heel material is melted and gelled or solidified during foaming after each injection.