JPH02193601A - Molding die and method for producing shoe soles with studs using the same - 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 Industrial fields in which the invention is commonly used> The present invention relates to a method for manufacturing a studded sole of an athletic shoe for sports, mainly for ball games, and a mold used in the manufacturing method.

<Prior Art> Various conventional methods of manufacturing shoe soles with studs and molds used in the manufacturing methods have been proposed.

According to the method of manufacturing a shoe sole with studs using one of the molds (B), as shown in FIG. The bottom of (24) (
25) providing a predetermined number of stud-shaped recesses (26) protruding from a predetermined portion of the lower surface of the base of the sole at a predetermined portion;
The bottom surface (25) mainly around the opening edge of each recess (26)
A female mold (22) provided with a reinforced plate-shaped shallow recess (27) mainly around the base of each stud on the lower surface of the base of the sole, and a recess (27) of the female mold (22) on the lower surface side. A pedestal part (28) having the same volume as the volume of 24) is fitted into each of the stud-shaped recesses (26) of the female mold (22) on the lower surface side of the pedestal part (28). A male mold (21) having a required number of convex portions (29), and a main mold (22) of the base of the sole on the lower surface side and the male mold (21) are abutted to form the base of the sole. Form an initial cavity in the shape of each shallow depression (27) in the shape of a reinforcing plate to reinforce the vicinity of the root of each stud in the section, and inject a rigid initial bottom material into the cavity at a predetermined pressure. Press to form an initial molded product (i.e., a highly rigid reinforced plate-like product), remove the male mold (21) from above the female mold (22), and replace it with the male mold (21) by preheating. The lid mold (23) is abutted against the female mold (21),
These lid type (23), female type (22), and the female type (22)
A next cavity is formed between the base part of the sole and each stud shape using the first molded product, etc., and a next sole material having a lower rigidity than the first sole material is placed in the cavity under a predetermined pressure. Inject and heat and press the next bottom material to integrally fix the next molded product (i.e., a predetermined number of studs and a reinforcing plate mainly around the base of the studs at a predetermined location on the lower surface side of the desired base) After that, the lid mold (23) is removed from the female mold (22), and the molded product is molded from within the female mold (22). there were.

However, because there is a difference in volume between the first cavity and the next cavity in the mold (B) (in other words, the depth (thickness) of the former is approximately 1.5 mmrf5 and the latter is 3.5 mm), the applied pressure is constant (e.g. 1
Even at 150 kg/cn, the latter is not only substantially reduced by half compared to the former, but also has slower and lower heat release (because
If the bonding surface of the first molded product, that is, the reinforcing plate, and the next molded product, that is, the base with each stud, is not sufficiently fused or pressurized (in order to peel it off, the other mold (B) is Figure 2 I to ■
As shown in FIG.
4) and a predetermined portion on the lower surface (33) of the platform (32), corresponding to each stud-shaped recess (26) of the female mold (22). Convex portions (34), (
34) and a plurality of relatively small-diameter, column-shaped impermeable holes (35) mainly around the base of each of the convex portions (34), that is, in a region corresponding to each of the shallow recesses (27) of the female mold (22); (3
5) and the male mold (31) provided with the mold carving (B'
) The female mold (22) and the male mold (31) are heated in advance and then abutted against each other to form shallow recesses (27) in the shape of reinforcing plates and a plurality of defects to reinforce mainly the base area of each stud of the sole. A first cavity in the form of through holes (35) and (35) is formed, and the first bottom material that becomes rigid is injected into the cavity at a predetermined pressure, and pressurized to form the first molded product (i.e., rigid). The male mold (31) is removed from the female mold (22) and replaced with the previously heated lid. The mold (23) is matched with the female mold (22), and the lid mold (23) and the female mold (22)
) and the first molding in the female mold (22), etc., to form the next cavity of the base of the sole and each stud shape, and in the cavity, a material having lower (inferior) rigidity than the first sole material. The next bottom material is injected at a predetermined pressure, and the next bottom material is heated and pressurized to form the next molded product (i.e., a predetermined number of studs and the main part of the studs are injected at a predetermined location on the lower surface side of the desired base). The studded sole (22) is molded around the base to which the reinforcing plate with the leg bits into the base is integrally fixed, and then the lid mold (23) is removed from the female mold (22). The molded article was produced by molding out from within the female mold (22).

Problems to be Solved by the Present Invention> According to the above-mentioned conventional molding die (B) for producing a shoe sole with studs and the method of producing a shoe sole with studs using the same, the initial molded product has a rigidity. After forming a reinforcing plate with a plurality of legs protruding from its upper surface, the next molded product, that is, a base having a predetermined number of studs on its lower surface, is integrally joined. Since a plurality of legs protruding from the upper surface of the reinforcing plate bite into the lower surface mainly around the base of each stud, in this case, the base and the reinforcing plate are firmly connected, and the above-mentioned forming It was assumed that defects such as those produced by the method of manufacturing shoe soles with studs using mold (B) would not occur.

However, the next bottom material is injected into the next cavity formed by the female mold (22) and the lid mold (23), which have a reinforcing plate with a plurality of legs on the top side of the first molded product. Even if heated and pressurized after that, as mentioned above, the heating rate is slow and the pressurizing force is halved, so the next bottom material cannot be sufficiently filled into the gap between each leg of the reinforcing plate. An air pocket is formed in a part of the gap between the parts, and the reinforcing plate and the base part are not sufficiently bonded to each other and easily peel off. For this reason, there was a risk that the reinforcing plate would lose its effect of preventing slippage of each stud and promoting durability.

Means for Solving the Problems> In order to overcome the deficiencies of the above-mentioned conventional method of manufacturing shoe soles with studs using the molds (B) and (B'), the present invention first involves forming a bottom plate. Multiple studs (14) on molded side
, (14), and then fusion-bond a thin reinforcing plate to said molding with a good amount of heat and a predetermined pressure. ) of the base (12) of the recess (5) and the bottom surface (7) of the recess (5)
a first female mold (2) provided with a plurality of indentations (6) in the shape of a plurality of studs (14) protruding from a predetermined portion of the bottom surface (13) of the base (12); 12), the male mold (1) that mainly forms the upper surface side, a base-shaped recess (5') that is the same as the recess (5) of the J-th female mold (2), and stud-shaped recesses (6). ') and a reinforcing plate (15) which reinforces mainly around the base of each stud (14) of the base (12) on the bottom surface (7) mainly around the opening edge of each of the stud-shaped recesses (6°). A mold (B) consisting of a second female mold (3) provided with a plurality of shallow depressions (8) is formed, and the male mold (1) and first female mold (2) are heated in advance to a desired molding temperature. Then, the male mold (1) and the first female mold (2) are brought into contact with each other, and a first cavity (
9), feed the first bottom material (20) into the bottom material (1
0) to form a first molded product having a plurality of studs (14) on the base (12) of the sole (11) and its bottom (13) side, and removing the first female mold (2) from the abutment of the first female mold (2) and replacing it with a preheated second female mold (3), abutting the male mold (1);
forming a next cavity (9') between the male mold (1) and the second female mold (3) and the first molded product in the female mold (3); The next bottom material (10'), which is more rigid than the first bottom material αω, is supplied into the inner space, and the bottom material (10') is pressurized to form the main base of each stud (14) of the base part (11). The base portion (11
) is molded into a next molding in the form of a shoe sole (11) with a stiffer reinforcement (15) than the male mold (1), and the male mold (1) is inserted into the second female mold (
22) Remove from the top and from within the second female mold (22) insert a number of studs (14), (1
4) and each stud (14) has a sole (11) with a base (12) to which a reinforcing plate (15) is fixed mainly around the base.
).

<Function> According to the molding of the present invention and the method for manufacturing a shoe sole with studs using the same, the male mold (1) in the mold
and the base part (12) of the sole (11), in which the first sole material (process 0) is injection molded into the first cavity (9) formed by the first female mold (2); Even if a plurality of studs (14), (14) are relatively thick, in other words, have a large volume (molded with a reduced pressure due to delayed heat distribution), the second female housing that accommodates the molded product Type (3)
When injecting the next bottom material, which is more rigid than the first molded material, into the next cavity (9') formed by the male die (1), the next cavity (9') is more rigid than the first cavity. Since it has a much smaller volume and is shallower (in other words, it is less than half the thickness), it has good heat dissipation, so it not only fuses to the first molded product, but also reduces the elasticity of the intervening first molded product. Even if you take this into consideration, still 1
Since it can be sufficiently pressurized with a pressure close to 150 kg/cra, the next molded product, i.e., the reinforcing plate (15) that mainly reinforces the area around the base of each stud (14), is used as the first molded product, i.e., the base part with each stud (14) ( 12) of each stud (14
) can be firmly pressurized and bonded mainly around the base.

<Example> The molding device of the present invention and the method of manufacturing each studded shoe sole using the molding device will be described below with reference to the drawings.

First, the molding device of the present invention is used in a known vertical, horizontal, or tri-lateral type shoe sole molding device with studs.

The mold (5) of the present invention uses a known bottom material such as mainly thermoplastic synthetic resin, preferably synthetic rubber, preferably polyurethane rubber, or nylon. Further, the molding device of the present invention is made of a known molding material such as steel or aluminum alloy. As shown in FIG.
5) and the base portion (12) on the bottom surface (7) of the recess (5).
The first female mold (2) has a plurality of stud (14) shaped recesses (6) protruding from a predetermined portion of the bottom surface (13) of the first female mold (2).
), a male mold (1) forming mainly the upper surface side of the base part (12), and a recess (5°) that is the same as the recess (5) of the first female mold (2) and a stud-shaped mold. Each dent (6
) with the same recess (6″) and each stud-shaped recess (
A plurality of shallow depressions (8) in the shape of reinforcing plates (15) for reinforcing mainly the periphery of each stud (14) of the base (12) are provided on the bottom surface (7°) mainly around the opening edge of the base (12). It is formed from two female molds (3). The molding die is formed into a shoe sole (11) by abutment between the male mold (1) and the first female mold (2).
) can be formed with a plurality of initial cavities (9) such as studs (14), (14) protruding from predetermined portions of the base (12) and its bottom surface (13). Next, the male mold and the first carrier can be attached.

Unlike the conventional molds fB) and (B'), the mold placement of the present invention is different from the conventional molds fB) and (B') in that each stud (
14) is characterized by molding a base portion (12) with a base portion (12).

Next, the method for manufacturing a shoe sole with studs using the above-mentioned mold arrangement is as follows:
and the first female mold (2) to a desired molding temperature, for example, 4
Heating at about 0°C, the male mold (1) and the first female mold (2)
and supplying the first low material (20) into the first cavity (9) formed by these two molds (1) and (2),
The base material (10) is pressurized to form the base (1) of the sole (11).
2) and a first molded product having a plurality of studs (14) on its bottom (13) side. After that, the male type (1
) and the first female mold (2), remove the first female mold (2) and replace it with the second female mold (3), which has been preheated to a temperature of about 40°C, into the male mold. (1) and the male mold (1)
) and a second female mold (3) and said first molding in said female mold (3), forming a first low material (10) in said cavity (9'). Supply the next lower material (io') which is more rigid and repeat the lower material (10')
) to create a shoe sole (11) shaped like Molding a molded object. After that, the male mold (1) is inserted into the second female mold (2).
) and remove the sole with the desired stud, i.e. the 6th
As shown in Figures I and ■, the base part (1) and the base part (1
2) a plurality of studs (14), (14) protruding downward from a predetermined portion of the lower surface (13), and each stud (14);
) A shoe sole (11) is molded around the main binding and base of the forefoot base (12), with a more rigid supplementary plate (15) fixed integrally to the lower surface (7) of the base (12). It is possible to (manufacture).

It has a much smaller volume than (9) and is thinner at less than half the thickness (by the way, the former is about 1.5 mm thick and the latter is about 3.5 mm thick), so it only has good heat distribution. First, since the low-heating material (10') can be sufficiently and firmly pressed and fused to the first molded product, both molded products, that is, the base part (12) and the reinforcing plate (15), are separated. There is no fear.

In addition, as in the conventional case, air pockets are formed in the base part around the legs of the reinforcing plate (15), and the wear resistance of the base part is reduced or the durability is deteriorated, such as chipping or damage. 2 to 2 and FIGS. 2 to 2 are examples of vertical cross-sectional views showing a conventional mold and a method of manufacturing a shoe sole with studs using the same. FIG. 3 is a schematic vertical cross-sectional view of a mold according to the present invention. FIGS. 4I and 1 and 5 and 5 1 and 2 are schematic longitudinal cross-sectional views showing the method of manufacturing a studded shoe sole according to the present invention. In FIG. 6, ■ and ■ are schematic illustrations of a shoe sole with studs manufactured by the manufacturing method according to the present invention, where ■ is a partially cutaway side view, and ■ is a cross-sectional view.

Drawing code> Prisoner...Molding mold, (1)...Male mold, (
2)...First female type, (3)...Second
female type, +5 to 5')... recess, +61 (6
')・・・Concave, (7)・・・Bottom surface, (
8)...Shallow recess, (9)...First cavity (9')...Next cavity, (10)...
...First bottom material, (10°)...Next bottom material.

that's all

Claims (1)

[Claims] 1. A recess (5) in the shape of the base (12) of the sole (11), and a bottom surface (7) of the recess (5) on the lower surface (
Each of the plurality of studs (14) protrudes from a predetermined portion of the stud (13).
)-shaped recesses (6), and a male mold (1) that mainly forms the upper surface side of the base (12).
), and a recess (5') which is also the same as the recess (5) of the first female mold (2), each stud-shaped recess (6'), and the main opening of each stud-shaped recess (6'). It consists of a second female mold (3) provided with a plurality of shallow depressions (8) in the shape of reinforcing plates (15) around the edge (7') to mainly reinforce the periphery of each stud of the base (12); The base of the shoe sole (11) (
12) form a first cavity (9) such as a plurality of studs (14), (14) etc. protruding from a predetermined portion of the male mold (1) and its bottom surface (13); A mold for the production of shoe soles with studs, characterized in that a first molding is formed by a cavity (9) and a subsequent cavity is formed by a second female mold (3). 2. The male mold (1) and the first female mold (2) are heated in advance to a desired molding temperature, and the male mold (1) and the first female mold (2) are brought into contact with each other. A first sole material (20) is fed into the first cavity (9) formed by (1) and (2), and the sole material (10) is pressurized to form the base (12) of the sole (11).
A first molded product having a plurality of studs (14) on the lower surface (13) thereof is molded, and from the abutment of the male mold (1) and the first female mold (2), a first female mold ( 2) is removed and replaced with a preheated second female mold (3), which is brought into contact with the male mold (1), and the male mold (1), the second female mold (3), and the female mold ( 3
) between the first molding and the next cavity (9'
) and place the first bottom material (
10) Supply the next more rigid bottom material (10') and pressurize the bottom material (10') to apply the base material mainly to the area corresponding to the root periphery of each stud (14) of the base (11). The sole (
11) Mold the next molded product of the shape, and separate the male mold (1) and the second
A method for manufacturing a shoe sole with studs, characterized in that the abutment of the female mold (2) is removed.