JP2000041702A - Shoe sole of three-layered structure and its production - Google Patents

Abstract

PROBLEM TO BE SOLVED: To impart suitable hardness and flexibility, cushion property and tracking property by injection molding a thermoplastic elastomer for molding a shoe sole body in an outsole part and simultaneously and integrally molding an outsole member and a shoe sole body to a three-layered structure and to improve the productivity. SOLUTION: The shoe sole 1 of the three-layered structure is manufactured by simultaneously integrating the outsole member 4 and the shoe sole body 6 by injection molding of the thermoplastic elastomer 5 for molding the shoe sole body to the outsole member 4 composed of an outsole design part 2 of synthetic rubber and the thermoplastic elastomer sheet joined and integrated thereto. More specific examples of the synthetic rubber include X-NBR, carboxylated acrylonitrile-butadiene rubber, synthetic isoprene rubber, acrylonitrile-butadiene rubber, or the like. More specific examples of the thermoplastic elastomer include amide-based elastomers, urethane-based elastomers, styrene-based elastomers, olefin-based elastomers, or the like.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION The present invention relates to a thermoplastic rubber sheet having a design portion made of synthetic rubber and a thermoplastic elastomer sheet, which are simultaneously and integrally formed, and then a thermoplastic elastomer shoe sole body member is injection-molded. The present invention relates to a shoe sole having a three-layer structure formed simultaneously and integrally and a method of manufacturing the same.

[0002]

2. Description of the Related Art Conventionally, as a material for molding shoe soles,
Various types are known. For example, in a prior application disclosed in Japanese Patent Application Laid-Open No. 8-294933, after a rubber surface is halogenated, a thermoplastic resin such as a polyurethane elastomer or a polyamide elastomer is compressed on the halogenated rubber surface. 2. Description of the Related Art An invention of a method for manufacturing a sole of a sports shoe which is formed by molding or injection molding in multiple colors is known.

[0003] Japanese Patent Application Laid-Open No. 7-195622 discloses that
A thermoplastic elastomer (TP) obtained by dynamically vulcanizing rubber dispersed in a fine particle state in a thermoplastic matrix.
A composite product in which a thermoplastic material is bonded to V),
That is, an invention relating to an article comprising a thermoplastic and a TPV is disclosed. Furthermore, as an example of shoes by insert molding or two-color injection molding, TP is placed on a polyetheresteramide sole (shoe sole) having high fatigue resistance, low deformation hysteresis, and excellent low-temperature characteristics.
It discloses an insert-molded shoe sole formed by injection of a V alloy (thermoplastic / rubber alloy).

In Japanese Patent Application Laid-Open No. Hei 8-505333,
Two layers of a composition comprising a lightened thermoplastic elastomer adhered onto a dense material of a non-lightened thermoplastic selected from the group consisting of polyetheramides, polyetheresters, and polyurethanes A shoe sole comprising an article is disclosed and known.

Further, Japanese Patent Application Laid-Open No. Hei 8-511174 discloses a composite structure obtained by directly combining a vulcanized elastomer containing a carboxylic acid group with a thermoplastic polymer containing a block; It is disclosed that soles of athletic shoes are manufactured by a manufacturing method of vulcanizing in the field. Others are similar to those disclosed in Japanese Patent Application Laid-Open No. 8-294933. After pretreatment such as primer or halogenation is performed on the surface of vulcanized rubber, the rubber is inserted into an injection mold, and the shoe sole is inserted. Athletic shoe soles made by injection molding the material of the body have already been commercialized.

[0006]

SUMMARY OF THE INVENTION The above-mentioned Japanese Patent Application Laid-Open No. 8-294.
In the method disclosed in Japanese Unexamined Patent Publication No. 933 or 933, or a similar method for producing soles and soles, secondary surface activity such as pretreatment such as primer or halogenation is applied to the surface of vulcanized rubber. In addition, in these production methods, when injection molding thermoplastic resins such as polyurethane elastomers and polyamide elastomers, the vulcanized rubber is easily deformed by injection pressure, The thermoplastic plastic wrapped around the design surface of the part, causing poor appearance. Therefore, in order to prevent these defects, the rubber hardness should be 7
Since it was necessary to set the hardness in the range of 5 to 85 A to increase the hardness and to increase the thickness of the rubber portion so as to correspond to the injection pressure, the shoe sole material was too rigid and too hard to be unsuitable. I could only provide a perfect shoe sole.

[0007] Also, as described in JP-A-8-505333, the adhesive is adhered on a dense material made of a non-lightened thermoplastic selected from the group consisting of polyetheramide, polyetherester and polyurethane. Of a composition comprising a lightened thermoplastic elastomer,
In a shoe sole made of a layered article, the durability of the shoe sole itself of the product may be reduced because the durability of the lightweight thermoplastic elastomer itself is low.

Further, Japanese Patent Publication No. Hei 8-511174 discloses a composite structure obtained by directly combining a vulcanized elastomer containing a carboxylic acid group with a thermoplastic polymer containing a block; In the case of manufacturing shoe soles of athletic shoes by a manufacturing method of vulcanizing in the field, there is no detailed description of the method of manufacturing shoe soles specifically, for example, when press molding is adopted, a thermoplastic polymer There was a problem that rubber burrs (coating) were formed and the product could not be commercialized from the appearance as it was.

In addition, in any of the above conventional methods for manufacturing shoe soles, the thermoplastic elastomer sheet is subjected to a molding temperature higher than the thermal deformation temperature by any method. In order to prevent these, a cooling device is required for the injection mold for the outsole, so it is necessary to install very expensive and complicated equipment,
There was a problem that it would be expensive in terms of manufacturing cost. Therefore, a method for producing shoe soles and shoe soles having good durability, moderate hardness, flexibility, cushioning properties and tracking properties as a sole material, good productivity, and low production cost is desired. Was rare.

[0010]

Means for Solving the Problems In order to achieve the above object, the present invention has found a shoe sole having the following constitution and a method for manufacturing the shoe sole. That is, the uncrosslinked synthetic rubber and the thermoplastic elastomer sheet are first preformed, and then the thermoplastic elastomer forming the sole body of the shoe is injection-molded on the thermoplastic elastomer, thereby producing a three-layer shoe sole and its production. It provides a method.

[0011]

Embodiments of the present invention will be described below in detail. That is, in the present invention of claim 1, a thermoplastic elastomer for molding a sole body of a shoe is injection-molded on an outsole member composed of a synthetic rubber outsole design part and a thermoplastic elastomer sheet joined and integrated. Thus, the outsole member and the sole body are simultaneously formed integrally to form a three-layer structure. In the present invention, the outsole design portion of synthetic rubber also includes a design portion formed of a normal uneven pattern or the like and a projection shape such as a cleats or a stud. In the above, an outsole having an uneven pattern as an outsole design part will be described.

Next, in the outsole member of the present invention, the design portion of the synthetic rubber and the thermoplastic elastomer sheet are integrated to form the outer shape of the design portion, and the sole sole body is formed. A shoe sole characterized in that the outsole member and the shoe sole body are simultaneously integrally formed by injection molding a thermoplastic elastomer for molding to form a three-layer structure.

Further, in the outsole member according to the present invention, the design part of the outsole made of synthetic rubber and the thermoplastic elastomer sheet formed into the outer shape of the sole are joined and integrated, and the sole is formed. The shoe sole according to claim 1, wherein the outsole member and the shoe sole body are simultaneously and integrally formed into a three-layer structure by injection molding a thermoplastic elastomer for molding the body.

Further, in the outsole member according to the present invention, the outsole design part of one synthetic rubber and the outsole design part of the other synthetic rubber are connected and integrated by a thermoplastic elastomer sheet, and the shoe sole is integrated. A sole having a three-layer structure formed by simultaneously molding the outsole member and the sole body by injection molding a thermoplastic elastomer for molding the sole body; It is.

Further, in the method of manufacturing a shoe sole according to the present invention, a member obtained by stamping out an uncrosslinked synthetic rubber kneaded sheet is arranged in the outsole design recess of the preformed shoe sole mold. After pressurizing and heating, the outsole design member opens the mold at the initial stage of crosslinking, and then installs a thermoplastic elastomer sheet having a shape substantially matching the outer shape of the outsole design recess. After that, pressurizing and heating again to form an outsole member in which the design portion of the synthetic rubber and the thermoplastic elastomer sheet are integrally formed, and the outsole member is trimmed into a design concave shape of an outsole injection mold. The thermoplastic elastomer sheet and the shoe are formed by arranging them so as to match the design concave portions of the injection molding die for the outsole and then closing the mold, and then injection-molding a thermoplastic elastomer for forming the sole body of the shoe. A method of manufacturing a shoe sole and a thermoplastic elastomer for body formation is characterized a three-layer structure was co-integrally molded.

According to a sixth aspect of the present invention, there is provided a method for manufacturing a shoe sole according to the present invention, wherein a member obtained by punching out an uncrosslinked synthetic rubber kneaded sheet is disposed in the outsole design recess of the preformed shoe sole mold. After pressurizing and heating, the outsole design member opens the mold at the initial stage of crosslinking, and then installs a thermoplastic elastomer sheet having a shape substantially matching the outer shape of the sole of the outsole. Pressurizing and heating again to form an outsole member in which the design portion of the synthetic rubber and the thermoplastic elastomer sheet are integrally formed. After trimming the outsole member into a shoe sole shape, the design of the injection molding die for the outsole is formed. After the mold is installed and clamped so as to match the concave portion, the thermoplastic elastomer for forming the sole body of the shoe is injection-molded to form the thermoplastic elastomer sheet and the thermoplastic elastomer for forming the sole body of the shoe. A method for producing a shoe sole, characterized in simultaneously integrally molded three-layer structure.

According to a seventh aspect of the present invention, there is provided a method for manufacturing a shoe sole according to the present invention, wherein a member obtained by stamping a kneaded sheet of uncrosslinked synthetic rubber is inserted into a plurality of outsole design recesses of a preformed shoe sole mold. After placing and heating under pressure, the outsole design member opens the mold at the initial stage of crosslinking, and then forms a thermoplastic elastomer sheet having a shape substantially matching the outer shape of the sole of the outsole. After installation, pressurizing and heating again to form an outsole member in which the plurality of synthetic rubber design portions and the synthetic rubber design portion are connected and integrated by a thermoplastic elastomer sheet, and the outsole member is formed into a shoe sole shape. After trimming, after installing the mold so as to match the design concave portion of the injection molding die for the outsole, after closing the mold, by injection molding a thermoplastic elastomer for forming the sole sole body, the thermoplastic elastomer sheet and Thermoplastic elastomer for bottom body formation is the production method of the sole, characterized in three-layer structure was co-integrally molded.

Incidentally, the synthetic rubber in the present invention includes:
X-NBR: carboxylated acrylonitrile-butadiene rubber, IR: synthetic isoprene rubber, NBR: acrylonitrile-butadiene rubber, BR: butadiene rubber,
SBR: styrene-butadiene rubber, NR: natural rubber and the like can be used. As the thermoplastic elastomer, TPAE: amide-based elastomer,
TPU: urethane elastomer, SBC: styrene elastomer, TPO: olefin elastomer, T
PEE: ester-based elastomer, TPVC: vinyl chloride-based elastomer, RB: polybutadiene, IR: isoprene, fluorine-based elastomer, chlorinated polyethylene,
EVA, ion-crosslinked polyethylene and the like can be used alone.

Further, the above-mentioned thermoplastic elastomer is used as a matrix resin, and fiber reinforced heat is obtained by using short fibers such as milled fibers or chopped strands made of carbon fiber, glass fiber, aramid fiber, high-strength polyester fiber or the like. It can also be used in the form of a plastic plastic (FRTP).

Preferably, the above thermoplastic elastomer is used as a matrix resin, and carbon fibers, glass fibers,
Fiber reinforced thermoplastic (FRTP) in the form of a stampable sheet impregnated into a woven or nonwoven fabric made of reinforcing fibers such as aramid fibers and high-strength polyester fibers
It can also be used as in this way,
By adopting the form of FRTP or stampable sheet, the rigidity and shape retention of the shoe sole are improved, and by using these reinforcing fibers, the shrinkage of synthetic rubber and the sheet made of thermoplastic elastomer alone are improved. Since the difference in shrinkage can be suppressed, the design part can be prevented from being deformed, and the degree of freedom in designing the shoe sole can be expanded to meet a wide range of needs.

[0021]

Next, an embodiment of the present invention will be described.
As shown in FIGS. 1 and 2, an outsole member 4 composed of an outsole design portion 2 made of synthetic rubber and a thermoplastic elastomer sheet 3 joined and integrated is provided with a thermoplastic elastomer 5 for molding a sole body. The sole 1 is characterized in that the outsole member 4 and the sole body 6 are simultaneously formed integrally by injection molding to form a three-layer structure.

Next, another embodiment of the present invention will be described. As shown in FIGS. 1 and 2, in an outsole member 4, an outsole design portion 2 made of synthetic rubber and a thermoplastic elastomer sheet 3 are integrated. The outsole member 4 and the sole body 6 are simultaneously formed integrally by injection molding a thermoplastic elastomer 5 for molding the sole body of the outsole. A shoe sole 1 having a structure.

Referring to another embodiment of the present invention, as shown in FIGS.
, A synthetic rubber outsole design portion 2 and a thermoplastic elastomer sheet 3 formed into a shoe sole outer shape are joined and integrated, and although not shown, a thermoplastic elastomer for molding a shoe sole body. The sole is characterized in that the outsole member 4 and the sole body are simultaneously formed integrally by injection molding to form a three-layer structure.

Referring to another embodiment of the present invention, as shown in FIGS.
In the above, the outsole design part 2 of one synthetic rubber and the outsole design part 2 of another synthetic rubber are connected and integrated by a thermoplastic elastomer sheet 3 to form a sole outer shape, and are not shown. Although not provided, the outsole member 4 and the sole body are simultaneously and integrally formed by injection molding a thermoplastic elastomer for molding the sole body, thereby forming a three-layer structure.

Next, the method of manufacturing the sole 1 of the present invention will be described. First, as shown in FIG. 5, an outsole design member 2A from which a non-crosslinked synthetic rubber kneading and dispensing sheet is cut out is preformed. After being placed in the outsole design concave portion 8 of the shoe sole mold 7 and subjected to pressurization and heating (150 to 160 ° C.), the outsole design member 2A is not crosslinked before it starts to be crosslinked (depending on the compounding of the synthetic rubber, After opening the mold, the mold is opened. Then, the thermoplastic elastomer sheet 3 having a shape substantially matching the outer shape of the outsole design concave portion 8 is set, and then hot pressing is performed. Pressurized and heated again to crosslink the uncrosslinked synthetic rubber outsole design portion 2 and simultaneously
Are melted and integrated to form the outsole member 4, and then the mold is cooled to about 120 ° C. or less,
And then outsole member 4 as shown in FIG.
After trimming into the design concave shape of the injection molding die 9 for outsole, the trimming is arranged so as to match the design concave portion 10 of the injection molding die 9 for outsole, and after clamping, the heat for forming the shoe sole body is formed. A sole 1 characterized by a three-layer structure in which the thermoplastic elastomer sheet 3 of the outsole member 4 and the sole body 6 are simultaneously and integrally molded by injection-molding the thermoplastic elastomer 5.
It is a manufacturing method of.

A method for manufacturing the sole 1 having a three-layer structure according to the present invention will be described with reference to a curast bridging curve shown in FIG. First, the outsole design member 2A from which the uncrosslinked synthetic rubber kneading and dispensing sheet has been cut out is placed in the outsole design recess 8 of the preformed shoe sole mold 7, and heated under pressure (150 to 160 ° C.). )I do. Next, the mold is opened at the initial stage of crosslinking of the outsole design member 2A. That is, the mold is opened once at a position corresponding to the time region A of the curast cross-linking curve in FIG. 7, and this time region differs depending on the compounding of the synthetic rubber. It is preferably within about 3 minutes, about 2 to 3 minutes for vulcanization with sulfur, and about 1 to 2 minutes for crosslinking with peroxide.

Next, after sandwiching the thermoplastic elastomer sheet 3 having a shape substantially conforming to the outer shape of the concave portion 8 for outsole design, the non-crosslinked synthetic rubber outsole design is again pressed and heated by a hot press. At the same time as the portion 2 is crosslinked, the thermoplastic elastomer sheet 3 is melt-bonded and integrated to form the outsole member 4. That is, the heating step is completed when the temperature reaches the flat crosslinking temperature in the time region B of the curast crosslinking curve in FIG. Next, after cooling the preformed shoe sole mold to about 120 ° C. or lower, the outsole member 4 is removed. That is, when the heating temperature is 150 to 160 ° C., the polyamide elastomer is in a molten state, and the polyamide elastomer and the synthetic rubber have different molding shrinkage rates (polyamide elastomer: 8/10
00, synthetic rubber: 23/1000).

Next, the outsole member 4 is made to have the same shape as the design concave shape of the injection molding die 9 for the bottom, or 0.1 to 5 mm (preferably about 0.1 to 0.3 mm).
After trimming the peripheral edge largely, the mold is clamped by arranging it so as to match the design concave portion 10 of the injection molding die 9 for the bottom.
That is, by arranging the outsole member 4, the shape of the peripheral edge of the outsole member 4 is changed to the action of the pressing pin on the design portion when the thermoplastic elastomer 5 for forming the sole body of the shoe is injection-molded. Accordingly, it is considered that the resin can act as a rubber packing, the injected resin does not flow around, leaks and does not generate burrs, and the shortening of the process can be measured from the viewpoint of the working process.

The outsole member 4 is formed by crosslinking the outsole design portion 2 of the uncrosslinked synthetic rubber by pressurizing and heating with the hot press and simultaneously melting and integrating the thermoplastic elastomer sheet 3. The conditions in this case depend on each material, but generally, from the crosslinking temperature of the synthetic rubber and the melting temperature of the thermoplastic elastomer sheet, the molding is performed in a temperature range of about 150 ° C. to 180 ° C. for 1 to 3 minutes. Time is needed. Thereby, the synthetic rubber outsole design part 2 is cross-linked, and the thermoplastic elastomer sheet 3
Are elongated by heating. Since the synthetic rubber outsole design portion 2 and burrs (coating) generated therefrom are cross-linked and adhered to the thermoplastic elastomer sheet 3,

In the method of manufacturing a shoe sole according to another embodiment of the present invention, the member 2A from which the uncrosslinked synthetic rubber kneaded sheet is die-cut is used as the outsole design recess 8 of the preformed shoe sole mold 7. And heated under pressure, the outsole design member 2A opens the mold at the initial stage of crosslinking,
Next, after installing the thermoplastic elastomer sheet 3 having a shape substantially conforming to the outer shape of the sole of the outsole, pressurizing and heating again to integrally mold the synthetic rubber outsole design portion 2 and the thermoplastic elastomer sheet 3. After forming the outsole member 4, trimming the outsole member 4 into the shape of a shoe sole, setting the outsole member 4 so as to match the design concave portion 10 of the injection molding die 9 for the outsole, clamping the mold, and forming the sole body of the shoe sole The present invention provides a method for producing a shoe sole 1 characterized by a three-layer structure in which the thermoplastic elastomer sheet 3 and the shoe sole body 6 are simultaneously and integrally molded by injection molding a thermoplastic elastomer 5 for use.

Further, in the method of manufacturing a shoe sole according to another embodiment of the present invention, a member 2A obtained by stamping out a kneaded sheet of uncrosslinked synthetic rubber is used for a plurality of outsole designs of a preformed shoe sole mold 7. After being placed in the recess 8 and heated under pressure, the outsole design member 2A opens the mold at the initial stage of crosslinking, and then has a shape substantially matching the outer shape of the sole of the outsole. After installing the thermoplastic elastomer sheet 3, pressurizing and heating again to form an outsole member 4 in which the plurality of synthetic rubber design portions 2 and the synthetic rubber design portions 2 are connected and integrated by the thermoplastic elastomer sheet 3; After trimming the outsole member 4 into the shape of a shoe sole, installing it so as to match the design concave portion 10 of the injection molding die 9 for the outsole, clamping the mold, and then injection-molding the thermoplastic elastomer 5 for forming the sole body of the shoe. By doing , A thermoplastic elastomer of the thermoplastic elastomer sheet 3 and the sole body 6 is a manufacturing method of the sole 1, wherein three-layer structure was co-integrally molded.

It is preferable that the thickness of the outsole design portion 2 of the synthetic rubber according to the present invention be set to about 1 mm to 5 mm. On the other hand, the thickness of the thermoplastic elastomer sheet 3 is about 0.1 mm to 1.
The Shore D hardness is preferably about 0 mm and the Shore D hardness is preferably 35 to 65, but in the configuration of the present invention, a thickness of about 0.5 to 0.75 mm is effective in consideration of the adhesive strength.
The resin to be injection-molded may be the amide-based elastomer sheet, or may be a urethane-based elastomer or a styrene-based elastomer as long as it can be welded. For example, if Atochem Japan (trade name: PEBAX5533) is used as the amide-based elastomer, if Atochem Japan (trade name: PEBAX6333) is used for the resin to be injection-molded, welding becomes possible. Chem Japan's (Product name: PEBAX
5533), it is possible to form a base portion having higher tensile strength and elastic modulus. Also, by selecting these materials, it is possible to produce a sole for sports shoes suitable for various purposes.

Examples of the rubber compound of the present invention are shown in Table 1 below.
The results are shown in Tables 2 and 3.

[0034]

[Table 1]

[0035]

[Table 2]

[0036]

[Table 3]

[0037]

In the shoe sole and the method of manufacturing the same according to the present invention, since the design part of the synthetic rubber and the thermoplastic elastomer sheet are cross-linked and adhered, the rigidity of the shoe sole is approximately 35 to 65 in D hardness. The rubber hardness is 60 to 75 in Shore A hardness, which is suitable as a shoe sole material, because the rubber is installed so as to match the design concave portion of the injection molding die for outsole.

Further, an outsole member in which the thermoplastic elastomer sheet is made 0.1 to 5 mm larger than the outer periphery of the synthetic rubber design portion is installed so as to match the design recess of the injection mold for the outsole. Therefore, when the thermoplastic elastomer for forming the sole body of the shoe is injection-molded, it is possible to prevent the synthetic rubber from entering the design portion.

In addition, in the conventional method of manufacturing shoe soles, usually, a rubber maker and an injection molding maker are often separate from each other. Therefore, the combination of such materials lowers the production efficiency. In consideration of production efficiency, a rubber manufacturer mass-produces an outsole member process of cross-linking a synthetic rubber design portion and a thermoplastic elastomer sheet, and injecting the outsole member into an outsole for an outsole by an injection molding manufacturer. Since the shoe sole body can be manufactured by being inserted into a molding die, the production efficiency is improved. As described above, in the shoe sole and the method of manufacturing the same according to the present invention, since the sole body of the shoe can be injection-molded, it can be formed into various shapes, thereby improving the degree of freedom in design.

[Brief description of the drawings]

FIG. 1 is a plan view showing a shoe sole having a three-layer structure according to the present invention.

FIG. 2 shows a three-layered shoe sole according to the present invention in FIG.
Sectional drawing which shows the cross section of the A section.

FIG. 3 is a plan view showing an outsole member of a shoe sole according to the present invention.

FIG. 4 is a cross-sectional view showing a cross section of a BB portion, a CC portion, a DD portion, and an EE portion of FIG. 3 which is the outsole member of the shoe sole according to the present invention.

FIG. 5 is a sectional view showing one step of the method for manufacturing a shoe sole according to the present invention.

FIG. 6 is a sectional view showing one step of the method for manufacturing a shoe sole according to the present invention.

FIG. 7 is an explanatory diagram showing a curast crosslinking curve according to the present invention.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Sole 2 Outsole design part 2A Outsole design member 3 Thermoplastic elastomer sheet 4 Outsole member 5 Thermoplastic elastomer 6 Sole body 7 Preformed shoe sole mold 8 Outsole design recess 9 Injection molding for outsole Mold 10 Design recess 11 Gate

Continued on the front page F-term (reference) 4F050 AA01 BA03 BA04 BA25 BA55 HA53 HA55 HA71 HA82 HA84 HA85 KA13

Claims (7)

[Claims] 1. An outsole member comprising a synthetic rubber outsole design part and a thermoplastic elastomer sheet joined and integrated with each other, and a thermoplastic elastomer for molding a shoe sole body is injection-molded on the outsole member. A shoe sole characterized in that a member and a sole body are simultaneously integrally formed into a three-layer structure. 2. The shoe according to claim 1, wherein the outsole member is formed by integrating an outsole design part of synthetic rubber and a thermoplastic elastomer sheet into an outer shape of the outsole design part. bottom. 3. The shoe sole according to claim 1, wherein the outsole member is joined and integrated with a synthetic rubber outsole design part by a thermoplastic elastomer sheet formed into a sole shape. 4. The outsole member is formed in a shoe sole outer shape by connecting and integrating an outsole design part of one synthetic rubber and an outsole design part of another synthetic rubber with a thermoplastic elastomer sheet. The shoe sole according to claim 1, characterized in that: 5. An outsole design member from which an uncrosslinked synthetic rubber kneaded sheet has been die-cut is placed in an outsole design recess of a preformed shoe sole mold and heated under pressure. The member is opened at the initial stage of crosslinking, the mold is opened, a thermoplastic elastomer sheet having a shape substantially matching the outer shape of the outsole design concave portion is installed, and then pressurized and heated again to design the synthetic rubber. To form an outsole member integrally molded with the thermoplastic elastomer sheet,
After trimming the outsole member to the design concave shape of the injection mold for the outsole, arranging the outsole member so as to match the design concave shape of the injection mold for the outsole, clamping the mold, and forming a sole body for the sole. A method for producing a shoe sole, characterized in that the thermoplastic elastomer sheet and the thermoplastic elastomer for forming the sole body of the shoe are simultaneously and integrally molded by injection molding a thermoplastic elastomer. 6. A member obtained by punching out an uncrosslinked synthetic rubber kneaded sheet is placed in an outsole design recess of a preformed shoe sole mold and heated under pressure, and then the outsole design member is crosslinked. In the initial stage of opening the mold, then, after installing a thermoplastic elastomer sheet having a shape substantially conforming to the outer shape of the sole of the outsole, pressurized and heated again, the thermoplastic rubber and the design part of the synthetic rubber Forming an outsole member integrally molded with an elastomer sheet, trimming the outsole member into a shoe sole shape, installing the insole member so as to match the design concave portion of the injection molding die for the outsole, clamping the mold, and then adjusting the shoe sole body Production of a shoe sole characterized by a three-layer structure in which the thermoplastic elastomer sheet and the thermoplastic elastomer for forming the sole body of the shoe are simultaneously and integrally molded by injection molding a thermoplastic elastomer for forming. Law. 7. A member obtained by punching out an uncrosslinked synthetic rubber kneaded sheet is placed in a plurality of outsole design recesses of a preformed shoe sole mold and heated under pressure. Open the mold at the initial stage of crosslinking, then after installing a thermoplastic elastomer sheet having a shape substantially conforming to the outer shape of the sole of the outsole, pressurized and heated again, the plurality of synthetic rubber A design part and a design part of synthetic rubber are connected and integrated by a thermoplastic elastomer sheet to form an outsole member. After trimming the outsole member into a shoe sole shape, the outsole member is formed into a design recess of an injection molding die for an outsole. After installing and closing the mold so that they match, the thermoplastic elastomer for forming the sole body of the shoe is injection molded, so that the thermoplastic elastomer sheet and the thermoplastic elastomer for forming the sole body of the shoe are simultaneously integrated. Method for manufacturing a sole characterized by shape is three-layer structure.