JPH0542004A - Process for manufacturing injection molded shoe and device therefor - Google Patents

Abstract

(57) [Abstract] [Purpose] To provide an apparatus for manufacturing an injection-molded shoe, which is capable of integrally injection-molding a drainage part and a blade part with a body part of a shoe body. A structure is characterized in that it has a last mold 20, a side mold 30, and a dummy bottom mold 40, and that a front dummy mold 50 for forming a water barrier and blades is attached to the front surface of the last mold 20.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a method and an apparatus for manufacturing an injection-molded shoe capable of integrally injection-molding a drainage part and a vane part with a body of a shoe body.

[0002]

2. Description of the Related Art Conventionally, the water barrier portion and the blade portion have been formed separately from the body portion of the shoe body and then attached to the body portion of the shoe body by means such as sewing, adhesion, and welder welding. It took a lot of work and became very expensive.

On the other hand, in the case of integrally molding the drainage part and the vane part with the body of the shoe body by the slush molding method, due to the restriction on the slush molding method, the bent part (folded part) of the water blocking part is narrowed. Could not be molded. Further, in the slush molding method, the thickness of the body portion of the shoe body and the like becomes uniform, and it is not possible to increase the wall thickness of the portion requiring strength, especially the bent portion in the drainage portion.

[0004]

SUMMARY OF THE INVENTION The present invention has been made to overcome such drawbacks, and an object thereof is to make it possible to integrally mold a water barrier portion and a blade portion with a shoe body trunk portion by injection molding. An object of the present invention is to provide a method of manufacturing an injection-molded shoe and an apparatus thereof.

[0005]

DISCLOSURE OF THE INVENTION The present invention is directed to a space for forming a body of a shoe body, a space for forming a drainage part connected to the front surface of the space for forming a body of the shoe body, and both the space. An injection characterized in that a synthetic resin is injected into a void for forming a blade extending from the connecting portion in the shoe tip direction, and the body of the shoe main body, the water barrier and the blade are integrally injection-molded. A method for manufacturing a molded shoe is provided.

Further, the present invention is characterized in that it has a last mold, a side mold and a dummy bottom mold, and a front dummy mold for forming a water barrier and blades is attached to the front surface of the last mold. An apparatus for manufacturing shoes is provided.

[0007]

In this way, from the shoe body trunk forming void portion, the water barrier portion forming void portion connected to the front surface of the shoe body trunk forming void portion, and the connecting portion of both the void portions in the shoe tip direction. By injecting synthetic resin into the extended wing-forming voids and integrally molding the shoe body trunk, the water shield and the blade, the shoe body trunk, water shield and blade An injection-molded shoe with integrated parts can be molded inexpensively and efficiently.

On the other hand, by having a last mold, a side mold, and a dummy bottom mold, and attaching a water blocking portion and a front dummy mold for forming a blade portion to the front surface of the last mold, the body of the shoe body and the water blocking portion are provided. Also, an injection-molded shoe having integrated wings can be manufactured inexpensively and efficiently.

[0009]

Embodiments of the present invention will now be described in detail with reference to the drawings. In addition, in this embodiment, a method of manufacturing a boot with a water barrier and blades is taken as an example. In FIG. 1 and FIG. 2, 10 is a manufacturing apparatus for a boot with a water barrier and blades, and this apparatus 10 mainly includes a last mold 20, a side mold 30, and a dummy bottom mold 40.
And a front dummy mold 50 attached to the front surface of the last mold 20. When the injection-molded boot is released, one side mold 30 rotates in the direction of arrow A and the front dummy mold 50 rotates in the direction of arrow B.

Further, the last mold 20 and the side molds 30 and 3 on both left and right sides (upper and lower sides in the figure) of the last mold 20.
A space 60 for forming the body portion of the shoe body is formed by 0. Further, on the front surface of the shoe body trunk forming void portion 60,
A substantially w-shaped water barrier forming void 70 is connected. The void portion 70 for forming the drainage portion is formed by the last mold 20 and the front dummy mold 50, and the bent portion 7 adjacent to the void portion 60 for forming the body portion of the shoe body.
The wall thickness of No. 1 is thicker than other portions due to the reinforcement. Furthermore, from the connecting portion 72 between the shoe body trunk forming void portion 60 and the drainage portion forming void portion 70, in front (toward the shoe tip portion).
The wing portion forming void portion 80 is connected toward.
The vane forming void 80 is formed by the side mold 30 and the front dummy mold 50.

Next, the operation of the boot manufacturing apparatus will be described. As shown in FIGS. 1 and 2, the last mold 20, the side mold 30, the dummy bottom mold 4
0 and the front dummy mold 50 are assembled, a synthetic resin for molding the body of the shoe body is injected through the injection hole 41 provided in the dummy bottom mold 40. Then, the space 60 for forming the body of the shoe body and the space 7 for forming the drainage portion are formed.
0 and the wing portion forming void 80 are filled with the above synthetic resin to form a water barrier portion and a shoe body trunk portion (not shown) with a wing portion.

After that, the dummy bottom mold 40 is formed.
Is replaced with a bottom mold (not shown), and the synthetic resin for the sole is injected into the space formed between the bottom mold and the midsole of the body of the shoe main body with the blade and the body of the shoe. And the boot with blades is molded.

Although the embodiment of the present invention has been described above, the present invention is not necessarily limited to this embodiment, and modifications and the like without departing from the scope of the invention are included in the present invention.

For example, in the embodiment, the example of forming the boot has been described, but the present invention is not limited to this, and the present invention can be applied to the manufacture of any shoe such as boots as long as the shoe can be injection-molded.

[0015]

As described above, according to the present invention, the void portion for forming the body portion of the shoe main body, the void portion for forming the drainage portion connected to the front surface of the void portion for forming the body portion of the shoe body, and the both void portions. Since the synthetic resin is injected into the wing-forming cavity that extends from the connection part of the shoe toward the tip of the shoe, the body of the shoe, the water barrier, and the wing are integrally injection-molded. Inexpensive injection-molded shoes with integrated water barrier and wings,
And now it can be molded efficiently. On the other hand, since the last mold, the side mold, and the dummy bottom mold are provided and the front dummy mold for forming the water shield and the blade is attached to the front surface of the last mold, the body of the shoe body, the water shield, and the blade are integrated. The injection-molded shoes made possible can be molded at low cost and efficiently.

[Brief description of drawings]

FIG. 1 is a cross-sectional view of an apparatus for manufacturing a boot with a water barrier and blades according to an embodiment of the present invention.

FIG. 2 is a sectional view taken along the line II-II in FIG.

[Explanation of symbols]

 20 Last Mold 30 Side Mold 40 Dummy Bottom Mold 50 Front Dummy Mold 60 Void for Molding Body of Shoe Body 70 Void for Forming Drainage Part 72 Connection 80 Pit for Forming Blade

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Claims (5)

[Claims] 1. A shoe body trunk forming cavity, a drainage part forming cavity connected to the front surface of the shoe body trunk forming cavity, and a connecting portion of both the voids extending in the shoe tip direction. A method for manufacturing an injection-molded shoe, characterized in that a synthetic resin is injected into the wing portion-forming voids, and the body portion of the shoe body, the water barrier portion, and the wing portion are integrally injection-molded. 2. The method for manufacturing an injection-molded shoe according to claim 1, wherein the cross section of the void portion for forming the water blocking portion is substantially w-shaped. 3. The method for manufacturing an injection-molded shoe according to claim 2, wherein the bent portion of the void portion for forming the water barrier portion is thick. 4. An apparatus for manufacturing injection-molded shoes, comprising: a last mold, a side mold, and a dummy bottom mold, and a front dummy mold for forming a water blocking portion and a blade portion is attached to a front surface of the last mold. .. 5. The front dummy mold is separated from the last mold when releasing the object to be molded.
An apparatus for manufacturing the injection-molded shoe described.