JPH06141904A - Manufacture of midsole - Google Patents

Abstract

PURPOSE:To overcome defects in the manufacture of a midsole, wherein already expanded EVA resin is heated and pressurized, and to mold the resin into a bottom peripheral component and a midsole main component with desired openings and channels formed in the side periphery of the midsole. CONSTITUTION:A midsole comprises a midsole main component (a) made from already expanded EVA resin, a bottom peripheral component (b), a packing component (c) and a member for damping impact inside the packing component (c), and the midsole main component (a), the packing component (c) and the bottom peripheral component (b) are bonded together at their respective junction surfaces and integrated into a midsole shape in such a manner that each of the channels of the bottom peripheral component (b), each of the channels of the midsole main component (a) and each of the openings of the packing component (c) are communicated with each other. An insert is fitted into each of the channel holes of the bottom peripheral component (b) of the midsole shape, and the midsole shape with the inserts fitted into the channel holes is enclosed in the fitting recess of a female mold and is heated and pressurized for a desired time.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an improved method for manufacturing a midsole having a sole suitable for jogging, running training, and other running shoes for running, and more specifically, shock damping mounted in the midsole. The present invention relates to the provision of a member that can be easily identified from the outer periphery of the member.

[0002]

2. Description of the Related Art A conventional method for manufacturing a midsole is mainly to use a foamed EVA resin material, a midsole main body, a component around the bottom, and a component such as a filling part accommodating an impact-damping member, respectively, in a cavity of a predetermined molding die. After being housed in a container, heating is applied to apply a pressure mainly in the vertical direction, each component is molded, and an adhesive is applied to each of these component abutting surfaces to bond them together. Was commonly used.

By the way, in recent years, a horizontal window is formed mainly on the side circumference of the midsole so that a window or the like is provided so that the presence of the shock-damping member in the filling component can be clearly seen. There has been a demand for providing athletic shoes for running having a midsole with an impact damping member. However, according to the manufacturing method of the midsole of the sole of the running shoe for running described above, since each of the components of the midsole is a molding means that mainly applies pressure in the up-down (vertical) direction, the horizontal means is orthogonal to this. Since the window or channel must be formed in the direction, the horizontal pressure or the pressure is destroyed by the vertical pressure, and the horizontal window or channel can be formed on the side circumference of the midsole. It was difficult.

[0004]

SUMMARY OF THE INVENTION The present invention overcomes the deficiency in the method of manufacturing a midsole, which is characterized in that the above-mentioned foamed EVA resin material is heated and pressed, so that the side circumference of the midsole is desired (mainly, mainly). It is an object of the present invention to form openings (horizontal direction) and channels mainly in the bottom peripheral parts and the midsole.

[0005]

SUMMARY OF THE INVENTION In order to solve the above-mentioned problems, the present invention provides an improved method for manufacturing a midsole made of a foamed EVA resin and having a shock-damping member housed at least in the center of the heel. Around the bottom having one or a plurality of horizontally penetrating channels 1 or 1 having at least an outer hole edge of an appropriately shaped hole on at least one side circumference of the heel side thereof. A component b material is formed, and at least a central portion of the heel portion is fitted with a filling component c material described below, and an upward recess 2 and a peripheral wall 5 of the recess 2 communicate with each channel 1 of the bottom peripheral component b material. Channel 4
Alternatively, a midsole main body a material having 4 and 4 is formed,
One or a plurality of openings that cover the shock-damping member d with one or a plurality of members and contact one or a plurality of channels 4 or 4, 4 of the midsole main body a on a part of its side circumference. Forming a filling part c material provided with the parts 3 or 3, and adhering an adhesive material to the joint surface thereof to integrally bond and form the midsole shape member, and a bottom peripheral part b material of the midsole shape member. Each of the channels 1 is fitted with a nest 7 or 7, 7 having a head 9 having a size slightly larger than the hole shape of each channel 1 and a protrusion 8 having the same size as the hole shape of each channel 1. The midsole shape member in which the nest 7 is fitted into each channel hole is housed in the fitting recess 10 of the lower mold 11 of the mold B having a cavity somewhat smaller than the midsole shape member, and the midsole 3 shape Lower mold 11 containing materials is upper mold Sealed with 2, which is intended to be novel means method of pressurizing the heating desired time.

[0006]

The method of manufacturing the midsole of the shoe sole according to the present invention is a shock-damping member which is a member different from the bottom peripheral part b material, the midsole main a material, and the outer midsole main a material made of the already foamed EVA resin material. Since the filling component c material with d interposed is applied integrally to each joint surface to form an integral joint, the filling component c material can be fixed uniformly and reliably at a predetermined portion.

Further, the convex portion 8 of each nest 7 is previously fitted and fixed in each channel-shaped hole of the bottom peripheral component b material, and then the midsole shape member in which the bottom peripheral component b material is joined is formed into a mold B.
It is stored in the fitting recess 10 of the lower mold 11, and this is stored in the upper mold 11
Since it is heated and pressure-molded after being hermetically sealed with, the cross-sectional shape of the convex portion 8 of each of the nests 7 is, for example, a channel 1 or 1 having various hole shapes such as a circle, an ellipse, a quadrangle, a triangle or a flower. 1 can be easily formed, and the appearance of the shoe sole can be significantly improved, and the impact damping member c can be seen from the side circumference of the shoe sole.

[0008]

EXAMPLE A typical example of a method for manufacturing a midsole of a shoe sole according to the present invention will be described below with reference to the drawings. That is, the method for manufacturing the midsole of the shoe sole according to the present invention is as follows. First, as shown in FIGS. 1 and 3, the foamed EVA resin is cut and formed into a midsole main body, and the midsole main body A recess 2 for fitting a filling component c material, which will be described later, is formed mainly on the heel side, and one or a plurality of channels 4 or 4, 4 penetrating horizontally in the peripheral wall 5 of the recess 2 are formed. To form a midsole-based a material.

Next, similarly, the already foamed EVA resin is cut into a peripheral member having a width and a length that surrounds and covers at least a part of the outer periphery of the midsole main body a, and the peripheral component parts are cut. Bottom peripheral part b material by perforating one or a plurality of channels 1 or 1 and 1 communicating with each channel 4 of the midsole main body a material mainly on the outer side and / or inner side of the heel side. To form.

Further, one or a plurality of members formed of the same foamed EVA resin are cut, and these members are assembled to accommodate the shock damping member d and the shock damping member d can be seen. One or more openings 3 in
Alternatively, the filling part c material provided with 3, 3 is formed. Next, an adhesive is attached to each joint surface in the recess 2 of the midsole main body a material, and the filling component c material is fitted and fixed so that the respective channels 4 and the respective openings 3 are aligned with each other. An adhesive is applied to the outer periphery of the midsole main body a material on each joint surface, and the bottom peripheral component b material is surrounded and joined so that the respective channels 1 and 4 coincide with each other to integrally form the midsole shape member. To form a joint. Further, in each channel 1 of the bottom peripheral part b material, a head portion 9 which is somewhat larger than the hole shape of each channel 1 and a hole-shaped convex portion 8 having substantially the same size as each channel hole shape and these The convex portion 8 of each nesting 7 having the intermediate portion 13 that is inclined between is fitted from the outside. Furthermore, the midsole profile is housed in a fitting recess 10 having a volume somewhat smaller than that of the midsole profile in the lower mold 11 of the molding die B, and the lower mold 11 containing the midsole profile is placed above. Sealed with form 12, about 145-175
At a temperature of ℃, at a pressure of 140 to 160 kg for about 3 to 6 minutes, heating and pressurization, the upper mold 12 is removed, each nest 7 is removed, and desired (Fig. 1, Fig. 3, Fig. 4, Fig. 5). A to C and FIG.
(Shown by A and B in FIG. 3).

[0011]

[Other embodiment] The method of manufacturing the midsole of the shoe sole of the present invention is as follows.
In addition to the method of manufacturing the midsole A shown by A and B in FIGS. 1, 3, 4, 5 and 6, as shown in FIG. 2, FIG. 3, FIGS. A midsole A represented by C or the like can be manufactured.

That is, the notched portion 16 is formed by removing the heel side so that the volume of the filling component c described later is fitted with the already foamed EVA resin, and at least one side of the heel side is formed. Forming a midsole main body provided with channels 4 or 4, 4 penetrating horizontally in the circumference,
The midsole main body a material has a width and a length that surround and cover at least a part of the outer circumference of the midsole main body a material with the foamed EVA resin, and the mid is mainly provided on the outer side and / or the outer side corresponding side. Forming a bottom peripheral component b material in which the channels 1 or 1, 1 communicating with the respective channels 4 of the sole main body a material and penetrating in the horizontal direction are formed, and one or more of the same foamed EVA resin is formed. Individual members are cut, and one or a plurality of closing portions 3 or 3, which are assembled to accommodate the shock-damping member d and are in contact with the shock-damping member d are formed in a part of these members. To form a filling part c material. Next, an adhesive is attached to each joint surface in the cutout portion 16 of the midsole main body a material to fit and fix the filling component c material, and further to the outer periphery of the midsole main body a material and the filling component c material. An adhesive agent is attached to each joint surface and each opening 3 of the filling component c and each channel 4 of the midsole main body a are communicated with each other, and each channel 4 of the midsole main body a and the peripheral parts of the bottom. Adhesives are attached to the respective joint surfaces so that the channels 1 of the b material are aligned with each other, and the bottom peripheral component b material is joined to form a midsole shape member integrally. Further, in each channel 1 of the bottom peripheral component b, a head portion 9 which is somewhat larger than the hole shape of each channel 1 and a hole-shaped convex portion 8 having substantially the same size as each channel hole shape and these The convex portion 8 of each nest 7 having the intermediate portion 13 that is inclined between is fitted from the outside. Next, the midsole profile is housed in a fitting recess 10 having a volume somewhat smaller than the midsole profile in the lower mold 11 of the mold B, and the lower mold 11 containing the midsole profile is placed above. Closed with mold 12, about 145
At a temperature of ~ 175 ° C and at a pressure of about 140-160 kg for about 3-6 minutes, the upper mold 12 is removed, and each nest 7 is removed to obtain the desired shape (see Figs. 2, 3, and 6). (Denoted by C)
The midsole A is molded. A chloroprene-based or polyurethane-based adhesive may be used as the adhesive for adhesively bonding the respective components.

[0013]

According to the present invention, the impact damping member c is the filling component c.
Since the filling component c is securely and uniformly attached to a predetermined portion of the midsole main body a, the impact that reaches 3 to 4 times that of the shoe-wearing foot is attenuated to prevent injury of the foot. Not only can this be prevented, but the forward force of the shoe wearer can be promoted by the impact resilience of the member forming the filling component c. Also, since each channel 1 of the bottom peripheral component b can be surely formed with various hole shapes (triangle, quadrangle, rhombus, circle, ellipse, etc.) using the nest 7, a good appearance is provided. it can. Further, the impact attenuating member d in the filling component C is seen through each opening 3 of the filling component c in contact with each channel 1 of the bottom peripheral component b and each channel 4 of the midsole main body a communicating with each channel 1. Therefore, the shoe wearer can wear athletic shoes equipped with the midsole A with peace of mind.

[Brief description of drawings]

FIG. 1 is a schematic plan view from above of a midsole manufactured by a manufacturing method according to the present invention.

FIG. 2 is also a schematic plan view of another embodiment of the midsole.

[FIG. 3] Similarly, a partially enlarged schematic view of a slope of a midsole of a midsole in which a filling component material is removed.

FIG. 4 is likewise a perspective view of the filling component of the midsole.

FIG. 5A is a partially enlarged schematic side view showing the outer circumference of the heel side of the bottom peripheral component, which is one of the main parts of the midsole. [B] Similarly, a partially enlarged side view of another embodiment of the bottom peripheral component. [C] Similarly, a partially enlarged side view schematic diagram of another embodiment of the bottom peripheral component.

FIG. 6A is a schematic cross-sectional view of the heel side of the midsole. [B] Similarly, a schematic cross-sectional view of the heel side of another embodiment of the midsole. [C] Similarly, a schematic cross-sectional view of the heel side of another embodiment of the midsole.

FIG. 7A is likewise a schematic view of a bevel of a nest forming a channel of a part around the bottom of a midsole. [B] Similarly, a schematic view of a slope of a nest forming another channel. [C] Similarly, a schematic view of a slope of a nest forming another channel. [D] A schematic sectional view of the insert.

FIG. 8 is a schematic sectional view of a molding die for molding the midsole.

[Explanation of symbols]

 [A] Midsole [B] Mold [a] Main midsole [b] Bottom peripheral component [c] Filling component [d] Impact damping member [1] Channel [2] Through hole or recess [3] Opening [ 4] Channel [5] Circumferential wall [6] Lower mold recess [7] Nest [8] Nest projection

[9] Nesting head [10] Lower mold fitting recess [11] Lower mold 11 [12] Upper mold 12

Claims (2)

[Claims] 1. A method of manufacturing a midsole, which is made of a foamed EVA resin and has a shock-damping member housed in at least a central portion of a heel portion, and which has an appropriately shaped hole shape at least on an outer hole edge. Alternatively, a bottom peripheral component b material having a plurality of horizontally penetrating channels 1 or 1, 1 on at least one side circumference of the heel part side thereof is formed, and at least the central part side of the heel part described later. An upward recess 2 into which the material of the filling component c is fitted, and a channel 4 which communicates with each channel 1 of the material of the bottom peripheral component b in the peripheral wall 5 of the recess 2.
Alternatively, a midsole main body a material provided with 4, 4 is formed, and the impact damping member d is covered with one or a plurality of members, and one or a plurality of the midsole main body a is formed on a part of its side circumference. Of the filling component c having one or a plurality of openings 3 or 3, 3 which come into contact with the channels 4 or 4 and 4 of the above, and a suitable adhesive material is attached to the joint surface thereof to form a midsole shape. Integrally joined to the material,
A nest 7 having a head 9 somewhat larger than the hole shape of each channel 1 and a convex portion 8 of the same size as the hole shape of each channel 1 in each channel 1 of the bottom part b of the midsole shape. Alternatively, the lower mold 11 of the mold B having the cavities of which the volumes 7 and 7 are fitted together and the respective nests 7 are fitted into the respective channel holes has a cavity having a volume somewhat smaller than that of the midsole A method for manufacturing a midsole of a shoe sole, which is characterized in that the midsole is housed in a recess 10 and sealed with a lower mold 12 containing the midsole shape member, and this is heated and pressed for a desired time. 2. A channel 1 or 1, 1 having at least a hole edge and having one or a plurality of holes penetrating in the horizontal direction and having an appropriately shaped hole shape is provided on at least one side circumference of the heel side thereof. Forming a bottom peripheral part b material, and forming a midsole main body a material in which at least a central portion side of the heel portion is formed with a notch 16 into which a filling part c material described later is fitted. Each of the channels 1 of the bottom peripheral component b material is covered with a member and covers the impact damping member d at a part of its side circumference.
One or a plurality of openings 3 or 3, 3 which come into contact with
Of the bottom peripheral component b, the midsole main body a material, and the filling component c material are attached to their respective joint surfaces with an appropriate adhesive to integrally form the midsole shape member. A head portion 9 which is formed by joining and is slightly larger than the hole shape of each channel 1 in each channel 1 of the bottom peripheral part b material of the midsole shape member, and a convex portion having the same size as the hole shape of each channel 1 A lower mold 11 of a mold B having a cavity 7 having a cavity somewhat smaller than that of the midsole shape member in which a nest 7 or 7, 7 having 8 is fitted and each nest is fitted in each channel hole. The lower mold 11 which houses the midsole shape member in the fitting recess 10 of the upper mold 12
A method for producing a shoe sole midsole, which is characterized in that it is hermetically sealed with, and heated and pressed for a desired time.