JPH0595805A - Mold for manufacturing sport shoes bottom part - Google Patents

Abstract

PURPOSE:To make a mold light in weight so as to facilitate changing work by forming a compact between a recessed part of a cavity side insert and the protruding part of a core side insert. CONSTITUTION:At the front wall of a pair of cavity side inserts 22 a recessed part 23 with a designed shoes bottom member for one pair of shoes is provided. Using the central side wall and lower wall of a recess 11 as the reference faces, a cavity side insert 22 is tightly fitted in the recess 11 of a cavity 10 and fixed. In a core 30 a pair of recessed parts 31 are formed at its portions corresponding to the recess 11 of the cavity 10, and a pair of core side inserts 40 are fitted therein. At the front wall of core side insert 40 protruding parts 41 are respectively formed at its portions corresponding to the recess part 23 of the cavity side insert 22. Material for forming is flowed in a part between the recess 23 and the protruding part 41 to form a compact. Since only the insert is changed in order to form a shoes bottom designed member with a diffferent design, the changing work is easy and light while the quality of the compact is improved.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an athletic shoe sole making die, and more particularly to an athletic shoe sole making die for injection molding used for making a synthetic resin shoe sole design member.

[0002]

2. Description of the Related Art A shoe sole design member made of synthetic resin and having anti-slip projections is fixed to the sole of an athletic shoe in order to prevent the sole from slipping. An injection molding die is used for producing the shoe sole design member. By the way, the mold for injection molding which is commercially available in the past has a weight of about 200-
It was 300 kg and was very heavy.

[0003]

In the conventional mold, it takes about 20 to 3 to remove the entire mold from the molding machine.
It took 0 minutes, about 30 to 40 minutes to set in the molding machine, and about 50 to 70 minutes for the replacement work. In addition, at the time of replacement, since the one once removed from the molding machine is used, the mold temperature is lowered, and the molding work cannot be performed until the mold temperature rises for about 30 to 60 minutes when the molding work is performed again. There was a problem. Further, since the mold is very heavy, there is a danger of working, a skill is required, and it is not possible for a woman to do it.

An object of the present invention is to provide a lightweight shoe sole making die which can be easily set on a molding machine.

[0005]

In order to achieve the above object, in a mold for making an athletic sole according to the present invention, a cavity having a concave portion and a cavity side fitted with the concave portion and provided with a concave portion are provided. A nest, a core having a recess formed therein, and a core-side nest fitted in the recess and provided with a raised portion,
A molded product is molded between the recessed portion and the raised portion.

[0006]

When the mold for making an athletic shoe sole constructed as described above is attached to the molding machine, the molding material flows from the sprue through the runner through the gate between the recessed portion and the raised portion to form the molding material. A product (a shoe sole design member) is molded. Then, the push-out plate is moved by the knock-out pin and is pressed by the knock pin that abuts against the push-out plate, and the molded product can be taken out from the recessed portion. Further, since the nest is fixed to the concave portion and the concave portion by the upper and side wedge members,
It is possible to improve the quality of molded products. Further, in order to mold shoe sole design members having different designs, only the inserts need to be replaced, so the work is easy.

[0007]

Embodiments will be described with reference to the drawings. 1
Reference numeral 0 is a cavity forming a female die of the die. In the cavity 10, a pair of recesses 11, 11 is formed so that one pair of shoes (that is, two left and right shoes) can be simultaneously manufactured.
Has been formed. Each recess 11 is composed of an opening 11a and a step 11b provided below the opening 11a. The upper concave groove 12 is formed on the upper wall surface and the side wall surface of the concave portion 11 so that the groove bottom gradually becomes shallower toward the rear surface side.
And side recessed grooves 13 are provided.

The cavity 10 is attached to a cavity frame 14. Reference numeral 15 is a cavity contact plate that constitutes the cavity frame die 14, and 16 is a knockout pin holding plate that constitutes the cavity frame die 14. A knockout pin 17 is held by the knockout pin holding plate 16, and the tip of the knockout pin 17 protrudes from the recess opening 11a and is inserted into a cavity side nest 22 described later.
An extrusion plate 18 for pressing is attached. Reference numeral 19 is a return pin attached to the knockout pin holding plate 16 and having a spring 20 interposed between it and the cavity contact plate 15. Further, reference numeral 21 is a moving side mounting plate for mounting the cavity frame mold 14.

A pair of cavity side inserts 22 and 22 are provided so as to fit in the pair of recesses 11 and 11. The front wall of the pair of cavity-side inserts 22, 22 is provided with a recessed portion 23 that is a shoe sole design member for one pair. Further, a plurality of knock pins 24, 24 ... Are projectingly provided on the back wall of each cavity side insert 22 at a portion corresponding to the opening 11a when the cavity side insert 22 is fitted into the recess 11 of the cavity 10. .. These knock pins 24, 24 ...
It is for taking out a molded product (shoe bottom design member) molded inside. That is, when the push plate 18 is moved to the cavity 10 side, the knock pins 24, 24, ... Are pushed to the recessed portion 23 and the molded product is popped out.

25 and 26 are cavity side inserts 22
Is an upper wedge member and a side wedge member which are fitted into the upper concave groove 12 and the side concave groove 13, respectively, in order to fix the cavity side insert 22 when the concave groove 11 of the cavity 10 is fitted. The wedge members 25 and 26 are formed so that the surfaces contacting the concave grooves 12 and 13 are inclined and become gradually thinner. Then, the cavity side insert 22 is tightly fitted and fixed in the recess 11 of the cavity 10 with the central side wall and the lower surface wall of the recess 11 as reference surfaces.

Reference numeral 30 is a core which constitutes a male mold of the mold. The core 30 is formed with a pair of recessed portions 31, 31 at a portion corresponding to the recess 11 of the cavity 10. The recessed portion 31 is provided with an upper recessed groove 32 and a side recessed groove 33 on the upper wall surface and the side wall surface thereof so that the groove bottoms gradually become shallower toward the rear surface side. The core 30 is provided with a gate 34 for allowing the molding material to flow into each recess 31.

Reference numeral 35 is a sprue knock plate arranged on the back side of the core 30. The sprue knock plate 35 is provided with a runner 36 which is a passage through which the molding material flows, and the runner 36 communicates with the gate 34. Further, 37 is a fixed side mounting plate, and is provided with a sprue 38 which communicates with the runner 36.

A pair of core side inserts 40, 40 are fitted in the pair of recessed parts 31, 31. The cavity side nest 2 is provided on the front wall of the core side nest 40, 40.
Protrusions 41 are formed at the portions corresponding to the recessed portions 23, 23 of 2, 22, respectively. In addition, the core side inserts 40 are formed in the recessed portions 31 of the core 30 on the back wall of each core side insert 40.
A plurality of pins 42, 42 ... Abutting on the inner wall of the recessed portion 31 when fitted into the recess are projected.

Similar to the cavity 10 side, the core 30 side is fixed to the core side nest 40 when the core side nest 40 is fitted into the recessed portion 31 of the core 30. An upper wedge member 43 and a side wedge member 44 which are fitted into the concave groove 33 are provided. Similar to the upper wedge member 25 and the side wedge member 26 used for the cavity 10, the upper wedge member 43 and the side wedge member 44 are formed so that the surfaces contacting the concave grooves 32 and 33 are inclined and become gradually thinner. Has been formed. Then, the core side insert 40 is used for the core 30 with the center side wall and the lower surface of the recess 31 as reference surfaces.
It is tightly fitted and fixed in the concave portion 31 of the.

[0015]

Since the present invention is constructed as described above, it has the following effects. In order to mold shoe sole design members with different designs, only the inserts need to be replaced, so the replacement work is lightweight and easy,
It can be easily installed by women. Moreover, since the insert is securely fixed by the upper and side wedge members, the quality of the molded product can be improved.

[Brief description of drawings]

FIG. 1 is a partially cut side view of a mold for making athletic shoe soles.

FIG. 2 is a front view of a cavity side.

FIG. 3 is a front view of the core side.

FIG. 4 is a perspective view of a cavity.

FIG. 5 is a perspective view of a cavity side insert.

FIG. 6 is a perspective view of a core side insert.

[Explanation of symbols]

 10 Cavity 11 Recess 22 Cavity Side Nest 23 Cavity 30 Core 31 Cavity 40 Core Side Nest 41 Protrusion

Claims (1)

[Claims] 1. A cavity having a concave portion, a cavity side insert fitted to the concave portion and provided with a concave portion, a core having a concave portion, and a core side having a convex portion fitted to the concave portion. A mold for making an athletic sole, comprising a nest, and a molded product is formed between the recessed portion and the raised portion.