JPH056443B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION [Industrial Field of Application] The present invention relates to a method of manufacturing an injection molded shoe having a side decorative tape on the side surface of the sole.

[Prior Art] In recent years, in order to improve the design of shoes, shoes having injection-molded soles provided with decorative tapes on the side surfaces of the soles, for example, in a color different from that of the soles, have been commercially available.

The conventional manufacturing method for shoes with this sole side decorative tape is to inject the sole onto the bottom of the shoe's leather by using a main body last, side mold, bottom mold, etc. For example, a synthetic resin shoe sole side decorative tape was adhered to the side surface of the shoe with a resin adhesive.

[Problem that the invention seeks to solve]

By the way, as mentioned above, the conventional method for manufacturing shoes with a decorative tape on the side of the sole involves first injection molding the sole on the bottom of the shoe sole, and then adhering the decorative tape on the side of the sole. Therefore, in addition to the injection molding process for the sole, a separate tape adhesion process was required to adhere the decorative tape on the side of the sole. In particular, it is difficult to mechanize the adhesion of this sole side decorative tape to the sole of the shoe, and in reality, this process is done by hand, which is time-consuming and tedious, and increases the cost of manufacturing the shoe. It was also the cause.

In addition, from the standpoint of shoe quality, such a laminated decorative tape on the side of the sole is likely to peel off when the shoe is used, and the decorative tape on the side of the sole in a peeled state is
On the contrary, this caused a decline in the design quality of the shoes.

In addition, when providing this shoe sole side decorative tape on the sole, first cut both ends of the long shoe sole side decorative tape into a predetermined shape, such as a curved shape that matches the design shape of the shoe sole. This is glued to a predetermined position on the side of the sole, but as mentioned above, this adhesion process is done manually, so the sole side decorative tape is precisely cut sharply into a predetermined shape. It was difficult to adhere the adhesive in place, resulting in many defective products.

The present invention was made against the background of such conventional technology, and can shorten the manufacturing time and reduce the cost of shoes without requiring a tape adhesion process. To provide a shoe sole side decorative tape that is difficult to peel off from the shoe sole, allows both ends of the shoe sole side decorative tape to appear sharply in a predetermined shape, and allows the sole side decorative tape to be accurately provided at a predetermined position on the side surface of the shoe sole. The present invention provides a method for manufacturing shoes having the following methods.

[Means for solving problems]

That is, in the present invention, a main body last to which a shoe lace is attached is fitted with a side mold, and then at least one pair of partition protrusions for forming a shoe sole side decorative tape separated from each other is attached to the side mold. A dummy bottom for forming a decorative tape on the side of the sole is fitted to form a gap for forming the decorative tape on the side of the sole. , by forming a fitting buffer part of the partition protrusion for molding the sole side decorative tape, and then injecting and filling the molding material for the sole side decorative tape into the cavity for forming the sole side decorative tape. Then, the dummy bottom for forming the sole side decorative tape is injection molded on the side surface of the bottom part of the shoe skin, and then the dummy bottom for forming the sole side decorative tape is removed from the side mold, and the main body for forming the sole of the shoe is injected into the side mold. A bottom mold is fitted to form a void for molding the sole of the main shoe, and then a material for molding the sole of the main shoe is injected and filled into the void for forming the sole of the main shoe, thereby injection molding the sole of the main shoe. The present invention provides a method for manufacturing shoes having a sole side decorative tape.

[Effect]

In the present invention, first, the main body last to which the shoe lace is attached and the side mold are fitted together.

After that, a dummy bottom for forming a sole side decorative tape, on which at least one pair of partition protrusions for forming a sole side decorative tape are formed, which are separated from each other, is fitted into the side mold. Form a void.

Thereafter, the sole side decorative tape molding material is injected and filled into the cavity for molding the sole side decorative tape, and the sole side decorative tape is injection molded on the bottom side of the shoelace.

Next, the dummy bottom for forming the sole side decorative tape is removed from the side mold, and the main body bottom mold for forming the main body sole is fitted into this side mold to form a void for forming the main body sole.

Next, the main body sole molding material is injected and filled into the main body sole molding cavity, and the main body sole is injection molded.

By doing this, the tape adhesion process can be omitted, the shoe manufacturing time can be shortened, and the cost of shoes can be reduced. In addition, the sole side decorative tape is difficult to peel off from the sole side, and the sole side decorative tape is Both ends can be sharply formed into a predetermined shape, and the sole side decorative tape can be accurately provided at a predetermined position on the side surface of the sole.

〔Example〕

Hereinafter, embodiments of the present invention will be described in detail based on the drawings, but the present invention is not limited to these embodiments.

In describing this embodiment, a method for manufacturing sports shoes having a two-layer sole and a decorative tape on the side of the sole will be taken as an example.

First, the configuration of a shoe sole injection mold used in the method for manufacturing shoes having a shoe sole side decorative tape according to an embodiment of the present invention will be described.

The shoe sole injection mold used in the method of this example is a mold for injection molding a shoe sole consisting of a plurality of partial soles, and as shown in FIGS. The main body last 1 is fitted and stacked in order from
0, side mold 20, double-sided dummy bottom (dummy bottom for molding decorative tape on the side of the sole) 3
0, and a main body bottom mold 40.

The main body last 10 is a last to which a shoe wrapper K is attached and is fitted to the upper part of the side mold 20, and also includes outflow control protrusions (partition protrusions for molding sole side decorative tape) 31, 31, which will be described later. ，
At the relative positions 10a, 10a, . . . , the fitting buffer portions 11, 1 of the outflow regulating protrusion 31, .
1,... are formed.

In addition, these fitting buffer parts 11, 11, .
Fitting cushioning materials 111, 11 made of synthetic resin such as hard rubber, wood such as cork, etc.
1,... are buried.

Further, at the bottom of the side mold 20, there is a fourth hole formed between the main body last 10, the side mold 20, and the double-sided dummy bottom 30.
A sole side decorative tape side gate 60 for injecting a sole side decorative tape molding material T1 into a sole side decorative tape molding cavity 50 which is a molding cavity for the sole side decorative tape T shown in FIGS. A gate forming groove 61 on the decorative tape side of the sole side is formed.

In addition, this sole side decorative tape side gate forming groove part 61 is formed on both sides of the side mold 20, as shown in FIG.

Further, as shown in FIG. 1, the heel side wall of the side mold 20 is coated with the sole side decorative tape forming material T1 at the sole side decorative tape side gate 60.
Injection hole 21 of the decorative tape molding material on the side of the sole that leads inward
Then, a midsole molding material (main body sole molding material) M1, which is a molding material for the midsole (main body sole) M shown in FIG. 6, is injected into a midsole molding cavity (main body sole molding cavity) 80 described later. A midsole molding material injection hole 22 is formed for this purpose.

The double-sided dummy bottom 30 is fitted into the lower part of the side mold 20 and includes at least one set of outflow control protrusions (partition protrusions for molding sole side decorative tape) 31, 31, . . . separated from each other.
...is a dummy bottom formed. The outflow regulating projections 31, 31, . . . are projections for controlling the outflow of the sole side decorative tape molding material T1 for limiting the molding area of the sole side decorative tape T.

The outflow control protrusions 31, 31, . . . are formed near the stepped and non-stepped parts on both upper sides of the double-sided dummy bottom 30, and the double-sided dummy bottom 30 It is a double-sided type for forming the side decorative tape T and the outsole A shown in Figs. 5 and 6. The upper part is for forming the sole side decorative tape T, and the lower part is for forming the outsole A. It is for molding.

Further, on the upper part of this double-sided dummy bottom 30, a bottom cover of a gate forming groove 61 on the side of the sole side decorative tape formed in the side mold 20 is provided as shown in FIGS. 1, 3 and 4. A groove sole cover portion 62 for forming a gate on the decorative tape side of the sole side is formed. In addition, this sole side decorative tape side gate forming groove lid part 62 corresponds to each part of the rubbing surfaces with the side molds 20 on both sides of the double-sided dummy bottom 30.

The main body bottom mold 40 is shown in FIGS.
As shown in the drawings and FIG. 5, a substrate mold of a shoe sole injection mold is fitted into the lower part of the double-sided dummy bottom 30, and this mold contains:
An outsole side gate 41, which is a gate for injecting outsole molding material A1 for injection molding the outsole A, is formed.

This main body bottom mold 40 is fitted with the double-sided type dummy bottom 30, so that these double-sided type dummy bottom 30 and the main body bottom mold 40
An outsole molding cavity 70, which is a cavity for molding the outsole A shown in FIG. 5, is formed between the two.

Next, to explain the manufacturing method of shoes having the sole side decorative tape of the present invention using these sole injection molds, first, as shown in Figs. The main body last 10 and the side mold 20 are fitted together.

After that, at the bottom of this side mold 20,
The double-sided dummy bottom 30 on which the outflow regulating protrusions 31, 31, .

At this time, the relative positions 10a, 10a, . . . of the outflow regulating protrusions 31, 31, .
1, 11, . . . are formed, the bulge K is generated due to the fitting pressure being applied between the outflow regulating protrusions 31, . . . , damage to the main body last 10 and the outflow regulating protrusions 31, 31, . . . can be reduced.

By fitting these side molds 20 and the double-sided dummy bottom 30, as shown in FIGS. 1 to 3, the gate forming groove 61 on the sole side decorative tape side and the sole side decorative tape side The gate forming groove bottom cover 62 is assembled to form the sole side decorative tape side gate 60.

Next, the main body bottom mold 40 is fitted into the lower part of this double-sided dummy bottom 30.

Next, the sole side decorative tape molding material T1 is injected and filled into the cavity 50 for forming the sole side decorative tape, and the bottom side surfaces K1, K1 of the sole side decorative tape are injected and filled.
The decorative tape T on the side of the shoe sole is injection molded.

At this time, the molding area of the sole side decorative tape T is restricted by the outflow regulating protrusions 31, 31... formed on the double-sided dummy bottom 30, so that the sole side decorative tape molding material T1 flows out. is regulated.

In addition, the specific flow path of this sole side decorative tape molding material T1 is first injected into the sole side decorative tape molding material injection hole 21 formed in the side mold 20, and the sole side decorative tape side gate is formed. It passes through the sole side decorative tape side gate 60 formed by the sole side decorative tape side gate forming groove 61 and the sole side decorative tape side gate forming groove and is injected and filled into the sole side decorative tape forming cavity 50. Bottom side surface K1 of K1, from the treading part to the non-treading part of K1, Fig. 4~
A shoe sole side decorative tape T shown in FIG. 6 is injection molded.

Next, the outsole molding material A1 is injected into the outsole side gate 41 of the main body bottom mold 40 shown in FIGS. 1 and 5, and the outsole A is injection molded within the outsole molding cavity 70. .

Next, as shown in FIG. 4, the molded sole side decorative tape T is left on the lower part of the shoe skin K, and the outsole A is left on the main body bottom mold 40, and a double-sided dummy bottom 30 is created. are removed from the side mold 20 and the main body bottom mold 40.

After that, as shown in FIG. 5, the main body bottom mold 40 on which the outsole A is placed is raised and fitted into the side mold 20, and the outsole A and the sole side decorative tape T are A midsole molding void 80, which is a void for molding the midsole M, is formed.

Thereafter, the mid-sole molding material M is inserted into the mid-sole molding material injection hole 22 formed in the side mold 20 into the mid-sole molding cavity 80.
1 is injected and the midsole M is injection molded, and at the same time, the sole is injection molded on the lower part of the shoelace K to manufacture shoes as shown in FIG.

As explained above, in the method of manufacturing shoes having the sole side decorative tape of the embodiment, the main body last 10 to which the shoe wrapper K is attached is fitted with the side mold 20, Later, a double-sided dummy bottom 30 on which at least one set of outflow regulating protrusions 31, 31, . Then, the sole side decorative tape molding material T1 is injected and filled into the cavity 50 for molding the sole side decorative tape, and the sole side decorative tape T is injected onto the bottom side surfaces K1, K1 of the shoe sole K. Then, the double-sided dummy bottom 30 is removed from the side mold 20 and the main body bottom mold 4 is attached to the side mold 20.
0 to form a midsole molding cavity 80, and then again this midsole molding cavity 80.
Since the sole is injection molded by injecting and filling the mid-sole molding material M1 inside, the tape adhesion process can be omitted, shortening the manufacturing time of the shoe, reducing the cost of the shoe, and adding decoration to the side of the sole. To prevent the tape from peeling off from the side surface of the sole, to make both ends of the decorative tape on the sole side appear sharp in a predetermined shape, and to accurately provide the decorative tape on the side surface of the sole at a predetermined position.

In addition, in the embodiment, the relative positions 10a, 10 of the outflow regulating protrusions 31, 31, .
Since fitting buffer portions 11, 11, . . . are formed in a, .
The body last 10 and the body last 10, which are generated due to the fitting pressure being applied between the body last 10 and the body last 10 on which the body last 10 is attached.
damage can be reduced.

Furthermore, in the example, since the double-sided dummy bottom 30 was used as the dummy bottom for molding the sole side decorative tape, the labor for molding a shoe having a midsole M and an outsole A in addition to the sole side decorative tape T was reduced. can be reduced.

Although the embodiments of the present invention have been described above, the specific configuration and operation are not limited to these embodiments, and even if there are design changes and process changes within the scope of the invention, the present invention include.

For example, in the example, one set of partition protrusions for forming the sole side decorative tape were provided on both sides of the upper part of the dummy bottom for forming the sole side decorative tape. A plurality of sets may be provided, and the shape of the protrusion is not limited.

In addition, in the example, a double-sided dummy bottom was used as a dummy bottom for molding the shoe sole side decorative tape to reduce the number of shoe manufacturing processes, but it is not necessary to use such a double-sided dummy bottom. good.

Furthermore, in the example, a method for manufacturing sports shoes with a two-layer sole and a decorative tape on the side of the sole was taken as an example, but any type of sports shoe, for example, a single-layer sole or a multi-layer shoe with three or more layers, may be used. It can also be applied to the manufacturing method of shoes.

Furthermore, in the embodiment, the fitting buffer part is formed by being buried in the main body last, but the invention is not limited to this, and for example, the fitting buffer part may be formed by protrusion molding. However, considering the time and effort involved in attaching the trumpet K, it is better to form it by burying it.

Furthermore, although it is not necessary to provide this fitting buffer part, it is better to provide it in consideration of the above-mentioned disadvantages caused by the fitting pressure applied to the main body last and the sole side decorative tape forming partition protrusion.

〔Effect of the invention〕

According to the present invention, the main body last to which the shoe laces are attached is fitted with the side mold, and then at least one pair of shoe sole side decorative tapes separated from each other are attached to the side mold. A dummy bottom for forming a sole side decorative tape with a partition protrusion formed thereon is fitted to form a cavity for forming a sole side decorative tape, and then the sole side decoration is placed in the cavity for forming a sole side decorative tape. A tape molding material is injected and filled to inject and mold a sole side decorative tape on the bottom side of the shoe skin, and then the dummy bottom for molding the sole side decorative tape is removed from the side mold and placed in the side mold. A body bottom mold for forming the body sole is fitted to form a cavity for forming the body sole, and then a body sole molding material is injected and filled into the body sole molding cavity to form the body sole. Because it is injection molded, the tape adhesion process can be omitted, shortening the manufacturing time and reducing the cost of shoes.In addition, the sole side decorative tape is difficult to peel off from the sole side, and the sole side decorative tape is not easily peeled off from the sole side. The advantages are that both ends of the tape can be sharply formed into a predetermined shape, and the sole side decorative tape can be accurately provided at a predetermined position on the side surface of the sole.

In addition, since the main body last was formed with a fitting buffer portion for the partition protrusion for forming the sole side decorative tape at the relative position of the partition protrusion for forming the sole side decorative tape, the sole side surface It can also reduce damage to the decorative tape molding partition protrusion and the main body last to which the decorative tape is attached, which is caused by the fitting pressure, which occurs on the decorative tape molding partition protrusion, the main body last, and the sole side decorative tape forming partition protrusion. You can get the effect that you can.

[Brief explanation of the drawing]

FIG. 1 shows the center of the shoe in the length direction, showing a state in which all of the shoe sole injection molds used in the method for manufacturing shoes having a shoe sole side decorative tape according to an embodiment of the present invention are fitted and stacked. 2 is a longitudinal sectional view, FIG. 2 is a plan view of the shoe sole injection mold used in the embodiment of FIG. 1, and FIG.
The figure is a central longitudinal sectional view in the shoe width direction of the shoe sole injection molding mold used in the embodiment shown in FIG. 1, and FIG. 4 is the shoe sole injection molding mold used in the embodiment shown in FIG. FIG. 5 is a central vertical sectional view in the shoe width direction when the bottom mold is replaced; FIG. 5 is a central vertical sectional view in the shoe length direction after the bottom mold of the shoe sole injection mold used in the example is replaced The figure is a front view of a shoe molded by the method of manufacturing a shoe having a sole side decorative tape according to an embodiment of the present invention. K...Top skin, K1, K1...Bottom side, T...
Sole side decorative tape, T1... Sole side decorative tape molding material, M... Midsole (main sole),
M1...Mitsudosole molding material (main body sole molding material), T1...Sole side decorative tape molding material, 1
0... Body last, 10a, 10a,... Relative position of protrusions, 11, 11,... Fitting buffer part, 20...
...Side mold, 30...Dummy bottom that can be used on both sides (dummy bottom for molding decorative tape on the side of the sole),
31, 31... Outflow regulating protrusion, 40... Main body bottom mold, 50... Cavity for forming sole side decorative tape, 80... Cavity for forming midsole (void for forming sole of main body).

Claims (1)

[Claims] 1. A shoe in which a main body last to which a shoe lace is attached and a side mold are fitted together, and then at least one pair of partition protrusions for forming a sole side decorative tape separated from each other are formed on the side mold. A dummy bottom for forming the sole side decorative tape is fitted to form a gap for forming the sole side decorative tape, and a dummy bottom for forming the sole side decorative tape is fitted to the main body last at a relative position of the partition protrusion for forming the sole side decorative tape. A material in which a fitting buffer part of the partition protrusion for molding the decorative tape is formed is used, and then a molding material for the sole side decorative tape is injected and filled into the cavity for forming the sole side decorative tape to form the decorative tape. A shoe sole side decorative tape is injection molded on the bottom side surface of the shoe, and then the dummy bottom for forming the sole side decorative tape is removed from the side mold, and a main body bottom mold for forming the main body sole is fitted into the side mold. A side surface of a shoe sole characterized in that a cavity for molding the sole of the main shoe is formed, and then a material for molding the sole of the main shoe is injected and filled into the void for forming the sole of the main shoe, thereby injection molding the sole of the main shoe. Method of manufacturing shoes with decorative tape.