JPS59151903A - Production of shoe sole - 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 Conventionally manufactured shoe soles, particularly athletic shoe soles, have good abrasion resistance and anti-slip properties on the contact surface side that contacts the ground, floor surface, etc., and also have good wear resistance and anti-slip properties. was required to be lightweight and have good elasticity.

In order to satisfy the above-mentioned requirements, conventional shoe soles are made of a foamed rubber body or a foamed resin body that is lightweight and has good elasticity, and a solid rubber body that is low crosslinked and has high wear resistance. A shoe sole bonded with an adhesive, or a non-crosslinked, non-foamed cellular rubber or resin material that is lightweight and has good elasticity, and a non-crosslinked solid rubber or non-crosslinked, non-foamed foam that has good wear resistance. Rubber material is heated and pressurized in a mold for shoe soles. Attempts have been made to manufacture integrally molded shoe soles through vulcanization or pressure reactions. The above-mentioned conventional method of manufacturing shoe soles, for example, is made by adhesively bonding a foamed foam material and a vulcanized solid rubber material, each of which is heated and pressed separately. After foam molding, these bonding surfaces are coated with an adhesive, bonded under pressure, and then cut and formed into the desired sole shape, which is time consuming and costly. Similarly, an unvulcanized rubber body material and an unvulcanized, unfoamed cellular rubber material, or a plurality of different unvulcanized, unfoamed rubber materials (consisting of different foaming ratio compositions) are delivered into the same mold. The shoe sole is then sealed and integrally heat-pressure vulcanized foamed or heat-foamed, etc. - Because the foaming conditions are different, the shape of the sole after foaming is different from the desired one, and the appearance is extremely poor, or the shoe sole is formed with multiple layers. The soles of the above-mentioned conventional products cannot be decorated with designs on the sides of the soles, and are not suitable for high value-added shoes. I was unable to make an offer.

Furthermore, in place of the above-described manufacturing method for soles, an unvulcanized, unfoamed rubber material is placed inside a lower mold and an upper mold, each having a recess with a desired sole shape and bottom design, and a foamed rubber material is placed thereon. A thermoplastic foam resin material is housed in the mold, and by heating and pressurizing the mold, the unvulcanized rubber material conforms to the design of the uneven bottom surface of the recess, and the rubber material forms the upper surface of the recess. By biting into and bonding to the cellular resin material, and because the cellular resin material is made of a material with good thermoplasticity such as EVA foam, the top, bottom, and side surfaces of the cellular resin material are formed into the desired shoe sole shape and design pattern by heat and pressure. Attempts were made to manufacture shoe soles with these features. (For example, the invention of Patent Application No. 205816 filed in 1981) According to the above-described method of manufacturing a shoe sole, a thin uncrosslinked rubber material, uncrosslinked, unfoamed cellular rubber, or cellular resin is placed in the mold of the sole. After supplying the material and a thick foamed and cross-linked cellular resin material thereon, these supplied materials are integrally molded, which greatly reduces the labor involved, and a decorative pattern is formed on a part of the outside. However, since the upper cross-linked member in the mold is a foam, the lower uncross-linked member cannot be suppressed strongly enough, and the shoe sole has an improved appearance. Since the lower uncrosslinked member is only formed into an intermediate sole shape, the desired sole design (especially the uneven design for sliding) cannot be clearly engraved on the bottom surface (touching surface) of the lower uncrosslinked member, and the upper If the members and the lower parts have a predetermined thickness, the joining surfaces of the door members will be jumbled, which not only spoils their appearance, but also prevents certain parts of the upper members from providing sufficient cushioning. However, there is a risk that the flexibility of the sole may not be achieved properly.

The manufacturing method of the sole of the present invention not only solves the above-mentioned defects in the manufacturing method of the sole, but also improves the thickness of the upper sole and the lower sole by making the thickness of the upper sole occupy a larger area. In order to improve the flexibility of the sole and make the design of the contact surface of the sole clear, the design of the contact surface of the sole (four parts and a convex part) is formed on the upper surface of the lower sole or within the gate on the upper surface side. In addition, a design (convex part and four parts) that corresponds to and interlocks with the design (concave part and convex part) of the contact surface of the lower mold is provided on the bottom side of the design. After delivering the uncrosslinked lower bottom material that will become the bottom and crosslinking the lower bottom material by heating and pressurizing it, or making it in a state that is still somewhat sticky before crosslinking, the upper part of the already crosslinked bottom material that will become the upper bottom The bottom material is delivered, and the upper mold and the lower mold are integrally connected between the upper mold and the lower mold, which have four parts with an upper bottom shape, and have an extremely good appearance, cushioning effect, and flexibility. The present invention can help provide soles for athletic shoes that are also comfortable to wear.

A method of manufacturing a shoe sole according to the present invention that can achieve the above-mentioned objects will be described below with reference to the drawings.

First, the manufacturing method of the sole of the present invention is as shown in FIG.
Thermoplastic cellular resin material (,) such as A foamed rubber material or a foamed resin material (b) is prepared. A foamed thermoplastic foamed resin material (
A and uncrosslinked cellular resin materials (B are cut and formed into the shape of the outer periphery of the sole of the shoe.

The manufacturing method of the sole of the present invention is shown in FIGS. 2I and II and 3I.
As shown in FIG. Lower sole (lower mold (1) in which a design (γ) corresponding to the flame contact surface design (13) is arranged in the shape of the outer periphery of the sole (B), which is approximately flat and extends on the lower surface side. The design (7) corresponds to the design (γ) formed in the upper surface (5) of the lower mold (1) or the recess (5) on the upper surface side.
), the lid mold (2) has designs ('f) arranged around the outer circumference of the sole (B), and the upper sole (1) of the sole (B).
It has an upper mold (3) with four parts (6) having a η-shaped shape and shaped like the outer periphery of the sole (B).

Therefore, first of all, the shoe sole (
The manufacturing method of B) is as shown in FIGS. The contact surface of the inner shoe sole (B) or a thermoplastic resin material, an uncrosslinked and unfoamed cellular rubber material, a cellular thermoplastic resin material, etc. (B5 is delivered, and the cellular thermoplastic resin material is The lower mold (1) delivered to the lid mold (
2), heat and pressurize these lower molds (1) and lid molds (
2) The above-mentioned cellular thermoplastic resin material etc. (b5
The design (7) of the lower surface of the lid mold (2) and the corresponding unevenness of the design (7) of the lower mold (1) fit together to form the lower sole (rotation) of the sole (B). ) is cross-linked into the uneven part shape of the ground-contact surface design (1B), or is in a state where it is still somewhat sticky before cross-linking, and after that state, etc., the lid wall (2 ) is removed from the upper mold (1). The foamed thermoplastic resin material (b), which has been crosslinked in this way or is still somewhat sticky before crosslinking, is then transferred to the corresponding lower mold (
The design (γ) of 1) and the design of the lid wall (2) (Design 03 of the desired shoe sole (B) contact surface on both upper and lower surfaces, especially on the lower surface side by being heated and compressed by η) The unevenness of the shoe sole (B) can be formed reliably and clearly.
), which not only does not spoil the external appearance of the shoe sole (B) but also effectively provides a non-slip effect on the contact surface side of the lower sole (111). In this case, the lower mold (1) A transparent hole or an impermeable hole α (support) is formed in one corner of the upper surface side other than the arrangement part of the design (7) provided in between, and the other lid mold (2) is formed in the lower mold (1). The cover wall (2) is provided with a knocking sound that is inserted into the transparent hole or impermeable hole αφ of the lid wall (2).
When covering and closing the lower mold (1), there is no knock on the lid wall (2) (0)
The lid wall (2) and the lower mold (1) can be tightly connected by inserting it into the transparent hole or impermeable hole α (support) of the lower mold (1). Furthermore, the lid wall (2) and the lower mold (1) are provided with a lower step provided at the end of each in the longitudinal direction (direction along the front-rear direction of the sole (B)), as shown in Fig. 4 (■). If the two types (1) and (2) are fitted and connected using the clamping parts (9), (9) with a cross-section shape provided separately on the shaped part (95), the connection between the two types (1) and (2) described above will be made stronger. In this way, the above-mentioned uncrosslinked and unfoamed cellular thermoplastic resin material (b), which is still somewhat sticky before desired crosslinking or crosslinking, can be made smoother.

Next, the clamping parts (9), which strengthened the connection between the front lower mold (1) and the lid wall (2) that covers and closes it, are attached to the lower mold (1) of the lid wall (2). Remove from and then lid wall (2)
is removed from above the lower mold (1), and the foamed thermoplastic resin material, etc. (b5) is removed from above the lower mold (1), and adhesive, etc. A slightly thick layer of thermoplastic resin material such as cross-linked foamed EVA or RB (
A) are delivered, and the lower mold (1) and the foamed thermoplastic resin material (b) and the thermoplastic resin body material (a) are combined into the upper mold (3).
Cover and heat and pressurize. In this case, the heating temperature is the lower part of the first sole Φ (such as a foamed thermoplastic resin material).
100 degrees Celsius to 2 degrees Celsius, approximately the same temperature as heating b5
00 degrees, but the heating time may be about 5 minutes or less, which is less than the time required to heat the foamed thermoplastic resin material (b'l).At this time, the upper mold (3 ) and the lower mold (1), which are sealed and heated and pressurized, the thermoplastic resin material (a) is a material that easily softens with heat, such as EVA or RB, so it should not be foamed or crosslinked. The above-mentioned cellular thermoplastic resin material is molded according to the outer peripheral shape of the upper sole (11) of the shoe sole (B) formed on the lower surface side of the upper mold (8) and is pressed downward. (b5
The adhesive and/or cellular thermoplastic resin material (b) that has also fit into the recess O → on the upper surface side and is applied and adhered to the bonding surface is still somewhat sticky before crosslinking. Coupled with this, the foamed thermoplastic resin material (b) is firmly and integrally bonded to the foamed thermoplastic resin material. (
, ) molds the upper sole (b), which is the thickest layer of the sole (13), and also molds the upper sole (b), which is also made of a cellular thermoplastic resin material (b).
) is a thin layer of the sole (6) and forms the lower sole (2) having a ground-contact-like design α3), and these upper sole (11) and lower sole (b) are integrally formed. A sole (6) is bonded and provided with a ground-contact-like design 03) on the ground-contact side of the lower sole (2). Then the mold (2)
The lower mold (1) and the upper mold (3) are cooled, and then the upper mold (3) covering and closing the lower mold (1) is removed and the lower mold (1) is cooled.
From inside ), mold out the sole of the shoe as shown in Fig. 8 and ■. At this time, the lower mold (1) of the mold (G)
And the upper mold (3) which covers and closes this, as shown in FIG. 2 1 and 8, the lower mold (
1) A through hole or an impermeable hole (a) provided in one corner of the upper surface side excluding the side where the design ( )) is formed; By inserting the knocking hole of the upper mold (8) into the transparent hole or impermeable hole (ψ, (9) of 1), both the upper and lower molds (1) and (3) can be firmly connected. The mold (8) has the lower mold (1) and the lid on both end sides in the longitudinal direction (direction along the front and rear direction of the sole (6)), as shown in the 4th drawing and ■. A low stepped portion (ψ) provided on the wall (2), a low stepped portion (9') similar to (9) # (9) is provided, so a U-shaped clamping portion also formed separately. Parts (9), (9)
Therefore, the lower stepped portions (9), (9) of the upper mold (8) and lower mold (1) are fitted and fixed to further strengthen the connection between the upper and lower molds (1) and (8). can.

The upper mold (3), the lid wall (2), and the lower mold (1) of the mold (5)
) and clamping parts (9), (9), for example, the lower mold (1
) Trademarks or decorative designs such as symbols or letters on the inner wall, etc. of the fourth part (5) of the upper mold (8) or the fourth part (6) of the upper mold (8) 0→
When the upper mold (3) with the lower mold (1) fully closed is removed, the upper mold (3)
) by the convex part of the engraving (8) or by the molded product of (b), such as a cellular thermoplastic resin that has entered the concave part.
3) may be difficult to remove.

Therefore, the upper mold (3) is
As shown in 〜■ and FIG. 7, the area corresponding to the area where the trademark or decorative pattern Q→ on the sole (B) should be displayed, such as the rear heel area or the outer side extending from the rear part of the heel to the arch of the foot. Cut (8'l, (take into account the cut (8'l)
'), (The space corresponding to eight spaces and a part of the recess (6) (six spaces and the inner wall of a part of the recess (6) have the above-mentioned shoe sole
) may be used in combination with the side molds (4) and (4) on which the uneven design (8) forming the decorative pattern α→ is formed.

In the first embodiment, the upper mold (3) and the side molds (4), (4) combined therewith are arranged on the upper surface (5) of the lower mold (1) or on the four parts on the upper surface side (the or a still somewhat sticky cellular thermoplastic resin material (b) before crosslinking;
After the upper mold (8) is fully opened, the side molds (4), (4) can be further slid laterally to match the upper mold (3). At this time, the side molds (4), (4) are the first upper mold (3).
In the same way as the knocking sound, the concave part (6) on its lower side
part (b5 is provided to knock α of the side mold (4), (4)
0), (110) as the through hole or impermeable hole α of the lower mold (1)
φ and on the other hand, the lower step part (9) of the upper mold (8)
) are provided with lower stepped portions (9'1.(Q)), and these lower stepped portions (9'l,
After fitting and fixing in (9), the sole of the first example (B)
It is sufficient to apply pressure at approximately the same heating temperature and for approximately the same time as in the manufacturing method of In this case, the side molds (4) and (4) are not removed at the same level as the upper mold (3), so the decorative patterns etc. (1) on the sole (6) are removed by sliding them.
4) There is no possibility of failure in removal due to the convex part or the four parts. Next, remove the upper mold (8) and remove the upper surface (5) of the lower mold (1).
) or the upper bottom (9) part and the lower bottom (2) part are integrally molded from within the recess on the upper surface side, and the desired decoration is made on the outer side of the heel part of the upper part αη or the part extending from the heel part to the unstepped part. A shoe sole (B) expressing the pattern (1→) can be molded.The shoe sole (6) has a clear and accurate design 03) of unevenness on the contact surface of the shoe sole, unlike the soles of conventional products. Not only does it have a very good appearance, but it also has sufficient anti-slip properties, which is one of the most important aspects of an athletic shoe sole, as well as a cushioning feature in the recess on the top side of the lower sole (2). Good E
Since the upper sole (b) parts made of VA or RB are joined together by biting, it is possible to provide a shoe sole with many effects such as improved cushioning properties and a stronger connection between the two parts.

[Brief explanation of drawings]

1 to 1 are shoe sole members used in the manufacturing method of the present invention, 1 to 2 are cross-sectional diagrams of cross-linked thermoplastic foam resin materials, and 2 is also an uncross-linked It is an unfoamed cellular thermoplastic resin, and ■ is a schematic diagram of the upper mold, lid wall, and lower mold used in the first example, and ■ is a schematic diagram of the upper mold and side mold used in the other examples. and a schematic diagram of the lower mold. FIGS. 3 and 3 are schematic plan views of the mold, where ■ shows the upper mold, the lid wall, and the upper surface side showing the lower surface side used in the first embodiment. Figures 4 (■) to (4) are examples of the overall schematic diagram of the mold used in the first embodiment. This is an example of a mouse. (In the case of a shimashiki-saki-sho, both the upper and lower bottom members are placed on the lower mold.
FIG. 7 is a schematic cross-sectional view of four other embodiments of the manufacturing method of the present invention. Fig. 8 ■ to ■ are examples of shoe soles manufactured by the manufacturing method of the present invention, where ■ and ■ relate to the first implementation, and ■ and ■ relate to other examples. . <Drawing code> (5)・・・・・・Molding mold, (B)・・・・・・
···Shoe sole. (a)......Pre-crosslinked thermoplastic resin body material. (b), (b)... uncrosslinked cellular thermoplastic resin material, etc. (1)... lower mold, (2)... ...
・Lid wall. (3)・・・・・・Upper mold, (4)・
......Side type. (5)・・・・・・Top surface? (5)
, (6), (1→・・・・・・Concavity. (7), (7), (8), (J3)−・・・・・・
··design. (9)・・・・・・・・・Package items, (9 items・・・・・・
...lower step. (9)) Knock, scream...
....--Permeable or impermeable hole. (11)・・・・・・Top bottom, (b)・
・・・・・・Lower bottom. Above are 2 drawings of fangs ■ O 2rsaTi 31-3 Artwork 3 -! J-3 Ko 1 4 sides of body, fangs 5'''

Claims (1)

[Claims] 1. A method for manufacturing a shoe sole in which an upper sole and a lower sole are molded into an integral shoe sole in a mold for soles, the sole having a lower sole shape and an upper surface (5). The upper surface (5) of the lower mold (1) on which the design (13) corresponding to the ground plane (7) of the bottom (B) is formed
A shoe sole (6) in which a rather thin layer of uncrosslinked rubber material, thermal ν resin material, or uncrosslinked and unfoamed cellular rubber material is formed on the upper surface (5) of the lower mold (1). The lid mold (2) with the design (7) that meshes with the corresponding design (7) is covered with the covering material (2), and then heated and pressurized, Forming a design αB) in the form of a contact surface of the lower sole (b) of a plastic resin material (b5 is crosslinked or is still in a somewhat sticky state before crosslinking and has a sole on the lower surface), Thereafter, the cross-linked or already cross-linked foam on the upper surface (5) of the lower mold (1), which is still somewhat sticky before cross-linking and which has a concave portion (T) on the upper surface side, is removed. A slightly thick layer of thermoplastic foamed resin material (a) such as foamed EVA or RB is placed, covered with an upper mold (3) having a recessed portion (6), heated and pressed again, and then These thermoplastic resin materials, etc. (b) and the cellular resin material are inserted so that a part of the lower surface of the cellular resin material (a) is inserted into the four parts (g) on the upper surface side of the cellular thermoplastic resin material, etc. (b). After the material (a) is integrally bonded, the upper mold (8) and the lower mold (1) are cooled, and then the upper mold (3) is removed, and the upper surface (5) of the lower mold (1) is removed.
) A design α3) in which the upper bottom (b) and the lower bottom (2) are integrally joined from above, and the lower bottom surface of the lower bottom (2) is in the form of a ground plane.
A method for manufacturing a shoe sole, comprising: forming a shoe sole (6). 2. The upper mold (8) of the mold (5) has four parts (6)
Claims characterized in that an engraving (8) is provided on the inner surface of the shoe sole at a location corresponding to the location where a trademark such as a symbol or character or a decorative design such as a pattern is to be displayed on the outer surface of the shoe sole. A method for manufacturing a shoe sole according to item 1. 3 The upper mold (3) of the mold (8) slides in the lateral direction mainly the heel part or the part extending from the non-stepping part to the heel part on the inner surface side corresponding to the side surface side of the sole (B). Method for manufacturing a shoe sole according to claims 1 and 2, characterized in that it forms three parts (6) of removable and deep four parts (6) and features a sole (B) on its inner wall. 4. Each mold (1), (2), (a) and (4), (4) of the molding mold has a low stepped portion (9 A method for manufacturing a shoe sole according to any of claims 1 to 3, characterized in that: 5 the lower mold (1) the λ palate mold (2) the L upper mold (8); The side molds (4), (4) are provided with a fixing frame (9L) of a separate member that fits each lower stepped part (9) at the end of the longitudinal direction.
A method 6 for manufacturing a shoe sole according to claims 1 to 4, characterized in that the lower mold (1
) is the sole of the shoe (B
) The design corresponding to the design 03) of the ground plane shape of the lower bottom of ) (
7. The method of manufacturing shoes according to any one of claims 1 to 6, characterized in that γ) is formed.