JPH0539849Y2 - - Google Patents

Description

[Detailed Description of the Invention] [Industrial Application Field] The present invention relates to a mold for injection molding shoe soles, which comprises a male mold and a female mold that are fitted into each other.

[Conventional technology]

Conventionally, it has a male mold and a female mold that fit into each other,
The contact part of the male mold with the female mold is a male mold side rubbing part having a male mold side rubbing surface, and the contact part of the female mold with the male mold is a female mold side having a female mold side rubbing surface. For example, the structure for preventing misalignment of the mold, which is the rubbing part, includes a misalignment prevention pin at a predetermined position facing each other in the male mold side rubbing part and the female mold side rubbing part, and a position misalignment in which the misalignment prevention pin is inserted. A displacement prevention structure (first structure) in which a prevention pin hole is arranged, and a displacement prevention structure (second structure) in which uneven fitting parts are provided on the outer surface ends of opposing side walls of the male mold and the female mold. ).

[Problem that the invention attempts to solve]

Incidentally, in both the first structure and the second structure, since the area of the fitting part between the male and female dies is usually small, the mold life of these male and female dies is limited by the length of the fitting part during repeated use. It was short due to wear, and when high fitting pressure was applied to the mold to increase the molding pressure of the molded object, cracks and damage were likely to occur in the fitting part.

The present invention was developed against the background of such conventional technology, and provides a mold for injection molding shoe soles that can extend the life of the mold and improve fitting pressure resistance.

[Means for solving problems]

That is, the present invention includes a male mold for forming the upper part of the sole and a female mold for forming the ground contact surface of the sole, which are fitted together, and the contact portion of the male mold with the female mold is A male mold side rubbing part having a male mold side rubbing surface, and a contact part with the male mold of the female mold is a female mold side rubbing part having a female mold side rubbing surface, for molding an injection molded shoe sole. In the mold, a misalignment prevention fitting structure for preventing misalignment of the mating positions of the male mold and the female mold is provided in the male mold side rubbing part and the female mold side rubbing part, respectively. The present invention provides a mold for injection molding shoe soles, which is characterized in that the mold is provided over almost the entire length in the inside and outside directions of the mold.

[Effect]

Since the present invention is as described above, when the male mold side rubbing surface and the female mold side rubbing surface are made to face each other and the male mold and the female mold are fitted together, the male mold side rubbing surface The misalignment of the male mold and the female mold is corrected by the misalignment-preventing fitting structure provided on the male mold and the female mold side rubbing portion, and the male mold and the female mold are fitted together.

〔Example〕

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

In describing this embodiment, a sole molding mold for molding an outsole of a multi-layer sole of an injection-molded shoe will be taken as an example.

As shown in FIG. 1, the shoe sole forming mold according to the embodiment of the present invention includes a pair of dummy lasts (male molds) 10,
A bottom mold (female mold) 20 is provided.

The dummy last 10 is a mold on the upper side of a shoe sole molding die that is placed on the bottom mold 20 and has a sole mold convex part 11 integrally molded in the lower center part. The periphery of the part 11 is a dummy last side rubbing part 12 having a dummy last side rubbing surface (male side rubbing surface) 12a that comes into contact with the bottom mold 20. is a dummy last side displacement prevention fitting part 3 which is one part of a displacement prevention fitting structure 30 that prevents displacement of the fitting position between the dummy last 10 and the bottom mold 20.
1 is formed over almost the entire length of the dummy last side rubbing portion 12 in the mold inward and outward directions.

In this embodiment, the dummy last side misalignment prevention fitting part 31 is connected to the sole mold convex part 1 over the entire length of the dummy last side rubbing part 12 in the mold outside direction.
1, and this dummy last side displacement prevention fitting part 31 has a corrugated shape that matches the design of the heel part of the outsole 41 of the sole 40 shown in FIG. It has a shape.

For this reason, the dummy last side rubbing surface 12a
The heel of the shoe has a wavy surface.

The bottom mold 20 is a lower side of a shoe sole molding die on which the dummy last 10 is placed and a sole mold recess 21 into which the sole mold protrusion 11 is inserted is formed in the center of the upper part. In this type, the periphery of this sole-shaped recess 21 becomes a bottom mold side rubbing part 22 having a bottom mold side rubbing surface (female mold side rubbing surface) 22a that contacts the dummy last side rubbing surface 12a. In addition, this bottom mold side rubbing part 22 has a positional displacement prevention fitting structure 3 that prevents displacement of the fitting position between the dummy last 10 and the bottom mold 20.
0, the bottom mold side misalignment prevention fitting part 32 is the other part of the bottom mold side rubbing part 2.
It is formed over almost the entire length in the inside and outside direction of the mold 2.

In this embodiment, the bottom mold side misalignment prevention fitting part 32 extends over the entire length of the bottom mold side rubbing part 22 in the mold inward and outward directions so that it can be fitted to the dummy last side misalignment prevention fitting part 31. The outsole 4 of the sole 40 is integrally formed around the heel of the sole-shaped recess 21 and shown in FIG.
It has a wavy shape that matches the design of the heel of No. 1. For this reason, the heel portion of the bottom mold side rubbing surface 22a is a wavy surface.

Further, on both sides of the bottom mold 20 in the shoe width direction, guide inclined surfaces 23a, 23a are provided to prevent the dummy last 10 from shifting in the shoe width direction when the dummy last 10 is fitted. Further, the bottom mold 20 is provided with outsole molding material from the bottom of the bottom mold 20 in a fitting gap (not shown) between the sole mold protrusion 11 and the sole mold recess 21. An injection hole 24 is formed for injecting and filling the outsole molding cavity.

In addition, in FIG. 2, S represents a sports shoe having a sole 40.

When using this shoe sole mold, the dummy last 10 and the bottom mold 20 are fitted with the dummy last side rubbing surface 12a and the bottom mold side rubbing surface 22a facing each other. As a result, even if there is a slight fitting misalignment, the misalignment in the shoe width direction can be corrected by the guide inclined surfaces 23a, 23a, and the misalignment in the shoe length direction can be corrected by fitting the dummy last side rubbing part 12 and the bottom mold side rubbing together. displacement prevention fitting structure 3 provided in the portion 22;
It is corrected with 0 and fitted.

Thereafter, an outsole molding material is injected from the injection hole 24 into an outsole molding gap (not shown) formed by fitting the dummy last 10 and the bottom mold 20, and the outsole 41 is injection molded.

As explained above, in the mold for injection molding shoe soles according to the embodiment of the present invention, the misalignment-preventing fitting structure 30 is provided between the dummy last side rubbing part 12 and the bottom mold side rubbing part 22. established,
In addition, this misalignment-preventing fitting structure 30 is provided over the entire length of the dummy last side rubbing portion 12 and the bottom mold side rubbing portion 22 in the mold inward and outward directions, so that the dummy last side misalignment preventing fitting is provided. The fitting area between the part 31 and the bottom mold side displacement preventing fitting part 32 is increased, so that the life of the mold can be extended and the fitting pressure resistance can be improved.

In addition, in the embodiment, the displacement prevention fitting structure 30
The dummy last side misalignment prevention fitting part 3 that constitutes the
1 and the bottom mold side displacement prevention fitting part 32 have a waveform shape that matches the design of the heel part of the outsole 41 of the sole 40, so that the design of the heel part 41 of the outsole 41 is This eliminates the need for detailed processing on the circumferential surface of the sole-shaped convex portion 11 or the sole-shaped concave portion 21 to produce a waveform on the heel portion 41.

Furthermore, in the embodiment, in order to correct misalignment in the shoe width direction with the lateral slip prevention protrusions 23, 23 having the guide inclined surfaces 23a, 23a, the dummy last side rubbing part 12 and the bottom mold side rubbing part The fitting structure 30 for preventing misalignment can be provided over the entire length of the mold in the outside and outside directions with 22, and the fitting area between the dummy last side misalignment preventing fitting part 31 and the bottom mold side misalignment preventing fitting part 32 can be provided. can be widened.

Although the embodiments of the present invention have been described above, the specific configuration is not limited to these embodiments, and any design changes that do not change the gist of the present invention are also included in the present invention.

For example, in the example, the mold is a shoe sole molding mold consisting of one male mold and one female mold, but is not limited to this, and can be used for molding other products consisting of multiple pairs. It may be a mold made of an appropriate material for use.

In addition, in the embodiment, the misalignment-preventing fitting structure is
Although it is provided in a predetermined part of the male side rubbing part and the female side rubbing part, it is not limited thereto, and may be provided in other places or the entire area, for example.

Furthermore, in the embodiment, this misalignment-preventing fitting structure was provided over the entire length of each rubbing part in the mold-inside and outside directions; It is sufficient if it is provided over almost the entire length. Further, although this positional displacement prevention fitting structure is designed to prevent positional displacement in only one direction, positional displacement in multiple directions or all directions can be prevented by changing the shape of the fitting part.

Furthermore, in addition to the misalignment prevention structure of the mold of the present invention, for example, misalignment prevention pins are provided at opposing predetermined positions of the male mold side rubbing part and the female mold side rubbing part, and the position where the misalignment prevention pins are inserted. If a displacement prevention structure in which a displacement prevention pin hole is arranged is used in combination, it is possible to better prevent displacement of the mold.

[Effect of idea]

In this way, the present invention provides a misalignment-preventing fitting structure on the male mold side rubbing part and the female mold side rubbing part, which prevents misalignment of the mating positions of the male mold and the female mold.
Since each rubbing portion is provided over almost the entire length of the mold in the outside and outside directions, it is possible to extend the life of the mold and improve the fitting pressure resistance.

[Brief explanation of the drawing]

Fig. 1 is a perspective view of an injection shoe sole molding mold in which a mold displacement prevention structure according to an embodiment of the present invention is adopted, and Fig. 2 is a perspective view of a shoe sole molding mold formed using the shoe sole molding mold shown in Fig. 1. FIG. 2 is a front view of a shoe using a sole. 10... Dummy last (male type), 12... Dummy last side rubbing part (male type side rubbing part),
12a...Dummy last side rubbing surface (male side rubbing surface), 20...Bottom mold (female mold), 22...Bottom mold side rubbing part (female side rubbing part), 22a...Bottom Mold side rubbing surface (female mold side rubbing surface), 30
...Mating structure to prevent misalignment.

Claims (1)

[Scope of utility model registration request] A male mold for forming the upper part of the sole and a female mold for forming the ground surface of the sole are fitted together, and the contact part of the male mold with the female mold is rubbed on the side of the male mold. In the injection mold for shoe sole molding, the male mold side rubbing part has a surface, and the contact part with the male mold of the female mold is a female mold side rubbing part having a female mold side rubbing surface. The male mold side rubbing part and the female mold side rubbing part are provided with a misalignment prevention fitting structure that prevents misalignment of the mating positions of the male mold and the female mold. A mold for injection molding shoe soles, which is characterized by being provided over almost the entire length of the shoe sole.