JPS6040844B2 - Shoe manufacturing method and manufacturing equipment - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a method for stably manufacturing shoes that are lightweight and have excellent waterproof and heat retaining properties through a simple process, as well as an apparatus for manufacturing the same.

Conventionally, shoes have been manufactured using a slush manufacturing method or an injection molding method in which the sole and the sole of the shoe are made of the same material.

However, in this manufacturing method, there are many restrictions on the desired shoe design in terms of comfort, feel, function, design, etc., based on differences in shoe types, uses, etc.

The present invention was completed as a result of research conducted to solve the above-mentioned problems. First, a shoe sole made of a material having a function corresponding to the purpose is molded separately in advance by pressing, injection molding, or other methods. Place this shoe sole in a predetermined position on the sole of the shoe mold, then pour the urethane mixture into the space using a power ring and use the foaming phenomenon of the urethane to form the shoe body, that is, the light part. A method has been developed that allows both the sole and the sole to be molded together at the same time, while also simultaneously attaching the sole to the separately manufactured sole.

Therefore, it can be manufactured without requiring expensive molding equipment or molds like injection molding, and it is extremely easy to change and combine shoe soles and shoe bodies of different materials and designs. This makes it possible to produce a wide variety of high-value-added shoes in small quantities with the same machine.

The present invention will be explained below with reference to the drawings.

FIG. 1 is an external perspective view of an embodiment of a shoe manufactured by the shoe manufacturing method according to the present invention, FIG. 2 is a cross-sectional view of the shoe shown in FIG. 1, and FIG. 4 is a sectional view taken along the day-to-day line in FIG. 1, FIG. 5 is a sectional view of the part where the deaeration material is inserted in the sole of a shoe, and FIG. 6 is a perspective view of one embodiment of the manufacturing apparatus according to the present invention. 7 is a sectional view of the manufacturing apparatus shown in FIG. 6, FIG. 8 is an enlarged view of a portion of FIG. 7, and FIG. 9 is an enlarged view of the J section in FIG. 7. The shoes manufactured by the shoe manufacturing method according to the present invention have a shoe body 1 as shown in FIG.
The shoe body 1 is made of foamed urethane resin, and as shown in FIGS. It is fixed to the bottom part 8.

The shoe body 1 has a surface layer on at least the outermost surface, and has a foam layer B and a diamond layer C on the inner surface, and has a structure as shown in FIGS. 2 to 4. At this point, a degassing module 5 made of a foam material with open cells or a cloth material such as thick hood cloth is inserted into the recess 4 provided in the sole 2 to remove gas and air generated during manufacturing from the mold. It has been done.

The sole 2 is formed in advance by a method such as pressing or injection using a material selected according to the function and purpose of use of the shoe product, and as shown in FIG. One or several recesses 4 are provided at each location, and a deaeration material 5 cut to a size that does not come off from the recess 4 when inserted into the recess 1 can be inserted, as shown in FIGS. 1 and 4. Similarly, the size of the sole 2 is larger than the size of the bottom part 7 of the shoe body 1, and an edge part 3 with a width of 10 to 3 broadsides is provided around the entire circumference. Next, a manufacturing apparatus according to the present invention will be explained.

As shown in FIG. 6, the sole mold 9 is provided with a concave portion 10 that corresponds to the pattern of the side surface and ground contact surface of the sole 2, and the inner mold 11 is for forming the shoe body 1. It is divided into a front opening and a rear opening, and there is an air vent 1 at an appropriate location on the bottom part 12 for releasing air when forming the shoe body 1.
3 is provided in at least the front inner mold, and as shown in FIG.
The air pipe 15 is connected to the shoe opening side of the inner mold 11 where the degassing port 13 is provided, and the air pipe 15 is connected to an air intake pump 17 via a cock 16 provided in the middle. The outer mold 18 is used to form the shoe body 1, and is divided into an outer mold 1 and an inner mold 2, as shown in FIG.

The outer part 1 and the inner part 2 of the outer mold 18 can be freely opened and closed by a hinge 19, and a locking device 20 enables cotton twilling. The bottom mold 9 also has a hinge 2 attached to the outer mold 18 as shown in FIG.
1 allows opening and closing, and locking device 22 allows twilling. A side space 23 between the inner mold 11 and the outer mold 18 for forming the hoof 7, and a bottom space between the inner mold 11 and the bottom mold 9 for forming the bottom. 21 is formed. The inner mold 11 is held by a mold holder 25, and the front side of the inner mold 11 can be moved vertically by a cylinder 26.

The details of the manufacturing device according to the present invention have been described above, and manufacturing is performed using this device in the following steps. The sole 2 with the material 5 inserted is pressed into the recessed part of the sole mold 9.

Connect the outer side C of the outer mold 18 and the inner side 2 of the outer mold 18 with a hinge 19.
and a locking device to form a space 23 between the inner mold 11 and the outer mold 18, and then mix the materials of the legs 7 and the bottom 8 to achieve uniform foaming and demolding time. While keeping the overflow constant for the purpose of shortening, an amount calculated in advance according to the capacity of the hoof part 7 and the bottom part 8 is injected into the betting space part 23, and the bottom mold 9 and the outer mold 18 are is closed with a hinge 21 and a locking device 22 to form a bottom space 24 between the bottom mold 9 and the inner mold 11. When the molds (inner, outer, and sole molds) are heated, the air existing in the cape space 23 and the bottom space 24 and the gas generated when the shoe body material foams are removed by the degassing material 5. A deaeration hole 13 provided in the bottom surface 12 of the inner mold 11 through the inside 14 of the inner mold 11, an air pipe 15,
It is sucked out by the pump 17 via the cock 16 and exhausted to the outside.

This exhaust completely removes the generated gas, air, etc. that previously remained in molded products made of foamed urethane resin material and degraded the product value, making it possible to significantly increase the product value. As soon as the foaming of the shoe material is completed, the sole mold 9 is removed from the outer mold 18 to open the sole mold 9, and then, at the same time as the outer mold 18 is opened, the cape part 7 and the bottom part 8 are inserted into the inner mold 11. The shoe body 1 and the inner mold 11 are separated from the pump 17 through the cock 16, the air pipe 15, the inside 14 of the inner mold 11, and the deaeration hole 13 provided in the bottom surface 12 of the inner mold 11 so that the shoe body 1 and the inner mold 11 can be easily separated from each other. Inner mold 1
The shoe body 1 is peeled off from the shoe body 1.

Subsequently, by operating the cylinder 26 and sliding the front side of the inner mold 11 upward, the shoe body 1 can be easily removed from the inner mold 11. As shown in FIG. 9, the sole has a width F that is increased by 1.0 to 3.0 feet over the entire circumference depending on the size of the bottom part 8 of the shoe body 1, and the sole mold 9 and the outer mold 18 between 0.7 and 1. By designing the bottom mold 9 so that a rib gap G is created, when the urethane liquid is injected between the outer mold 18 and the inner mold 11, the urethane liquid will rise (foam and expand). phenomenon), which eventually fills the instep space 23, reaches the sole, and also fills the sole space 24, but the sole material indented into the recessed part of the refundable mold 9 comes into contact with the sole mold 9 and the outside. Since there is a gap between the shoe sole 2 and the mold 18, the sole 2 functions as a packing to maintain airtightness and prevent the urethane liquid from leaking.

As shown in FIG. 8, a recess 4 larger than the deaeration hole 13 is provided at a location corresponding to the deaeration hole 13 of the inner mold 11 of the sole 2, and a deaeration material 5 is inserted into the recess 4. By closing the inset deaeration hole 13, gas generated during rising and air in the cape space 23 and bottom space 24 are removed from the deaeration hole 13 through the deaeration material 5 to the inside 14 of the inner mold 11.
, the air pipe 15, the cock 16, and the pump 17 before being discharged to the outside.

Since this degassing material 5 only allows gas to pass through, it is preferable to use a breathable open-cell foam such as PVC, polyethylene foam, etc., or a fabric such as thick canvas. It is desirable that the material is completely fixed to the recess of the shoe sole (depth of the recess), and that it is flexible even if it becomes part of the insole of the shoe. Moreover, it must be a material that does not allow the urethane liquid to pass through.

Considering the position, number, size, etc. of the degassing holes 13, it is most desirable that the position be near the highest point of the bottom part, considering the moldability.

The reason for this is that it is convenient for deaeration. The best size of the deaeration holes 13 is 2 to 3 diameters and 1 to 5 holes. As explained above, the present invention is economical because molding of the shoe body and fixing of the sole can be completed in one operation.
In addition, since the sole can be freely selected, it is possible to produce a wide variety of products using the same equipment, and by using foam material, shoes that tend to be heavy, especially rain boots, can be made lighter, and shoes with excellent heat retention and waterproofness can be produced. It has many features such as: Next, further explanation will be given with reference to examples.

Example A shoe sole 2 made of a pressed cup made of synthetic rubber, with a deaeration material 5 made of a foamed urethane resin having open cells in the recess 4 and having a height of 2 willows above the fixed surface of the sole. is inserted into the concave part 101 of the bottom mold 9, and the front side A of the inner mold 11 is inserted into the outer side H of the outer mold 18 with the cylinder 26 lowered and held in a predetermined position in the mold holder 25. The inner mold 11 and the outer mold 18 are closed and fixed with a hinge 19 and a locking device 20, and a mixed solution consisting of isocyanate 100 and polyol 95 is poured into the mesh space 23 created between the inner mold 11 and the outer mold 18 to a concentration of 40 to 45 oz. A predetermined amount of the overflowing shoe body material calculated to have a foaming ratio of 1.45 and an average foam density of 0.7 is injected, and the sole mold 9 is immediately attached to the outer metal 18 with the hinge 21. The locking device 22 closes and fixes the pump 17, and the air remaining in the bowl and bottom space and the gas generated from the shoe body material are gradually removed through the open bubbles of the degassing material 5 through the degassing holes 13, Inside 1 of inner mold 11
4. Suction and exhaust through air pipe 15 and cock 16.

By heating the mold to 50-60oC for 15 minutes, the shoe body material is foamed to form the promontory of the shoe body 1, and then to form the sole 8, and at the same time to bond the sole 2 and the sole 8 of the shoe body 1. Make it stick. After that, the outer mold 18 of the sole mold 9 is opened, and at the same time as the outer mold 18 is opened, air is pumped from the pump i7 through the cock 16, the pipe 15, the inside 14 of the inner mold 11, and the air release hole 13 to the shoe body 1 and the inside. The shoe body 1 is fed between the inner mold 11 and the inner mold 11 to make it easier to separate from the inner mold 11, and the cylinder 26 provided on the shoe opening side of the inner mold 11 in which the air release hole 5 is provided is actuated. Mold 1
The shoe was completed by lifting a part of the shoe body 1 upward and removing the shoe body 1 from the inner mold 11. By manufacturing according to the above method, it was possible to easily obtain lightweight shoes with excellent heat retention and having a desired sole, which was difficult to obtain in the past.

[Brief explanation of drawings]

FIG. 1 is an external perspective view of an embodiment of a shoe manufactured by the shoe manufacturing method according to the present invention, FIG. 2 is a sectional view of the leg of the shoe shown in FIG. 1, and FIG. 3 is a bottom view of the shoe. FIG. 4 is a sectional view taken along the line H-day in FIG. FIG. 7 is a sectional view of the manufacturing apparatus shown in FIG. 6, FIG. 8 is an enlarged view of a part of FIG. 7, and FIG. 9 is a perspective view.
The figure is an enlarged view of section J in Figure T. 1... Shoe body, 2... Sole, 3... Edge part, 4... Concave part.
5... Deaeration material? ...Cape part, 8...Bottom part, 9...Bottom mold, 10...Concave part" 11...Inner mold, 12...Bottom part,
Wing 3... Deaeration hole, 14... Inside, 16... Air pipe, 16... Cock 17... Pump ~ 18... Outer mold, 1
9...Hinge, 20...Lock device, 21...Hinge, 22.
...Lock device, 23...Space resistant part, 24...Bottom space part, 25...Mold holder 26...Cylinder, A...
Surface layer, B...foam layer, C...diamond layer, F...sole edge cloth is also G...
void. Figure 1 Figure 2 Figure 3 Figure 4 Figure 5 Figure 6 Figure 7 Figure 8 Figure 9

Claims (1)

[Claims] 1. A shoe sole having one or several recesses on the contact surface pattern and the fixed surface side is prepared in advance by pressing or injection,
A deaeration material made of foam having open cells or a cloth material such as thick canvas is fixed to the recess of the sole, the sole is inserted and held in the recess of the sole mold, and the outer mold is used as a hinge. A locking device is used to close the mold, and a hollow space is formed between the outer mold and the inner mold. A preset amount of a separately prepared mixed and heat-insulated foamed urethane resin material is injected into this hollow space. Immediately close the sole mold to the outer mold with a hinge and locking device to form a sole space between the sole and the inner mold, and at the same time heat the mold to a set temperature, and then turn on the pump. When activated, the air remaining in the shoe space and the sole space and the gas generated when the urethane resin foams are removed using a degassing material and a degassing hole provided in the inner mold at a position corresponding to the concave part of the sole of the shoe. The interior of the inner mold, an air pipe connected to the shoe opening side of the inner mold, and a hole provided in the air pipe are gradually sucked out and exhausted to the outside, and the urethane resin is foamed to form the collar space and the sole space. After filling and integrally molding the sole and sole, the sole mold is released from the outer mold, and at the same time as the outer mold is opened, air is pumped through the pump, air pipe, inside of the inner mold, and degassing hole. The inner mold is fed between the shoe body and the inner mold to make it easier to separate the shoe body from the inner mold, and also operates a cylinder provided on the shoe opening side of the inner mold that has an air release hole to release the inner mold. A shoe manufacturing method in which the shoe body is removed from the inner mold by lifting a part of the mold upward. 2. A bottom mold having a concave part corresponding to the convex part of the contact surface pattern of the sole, and a bottom mold that is divided into a front side and a back side, and at least the inside of the front side is hollow, and the bottom part is penetrated inside. The inner mold is equipped with a deaeration hole, the cylinder is provided on the shoe opening side of the front inner mold and can move the front inner mold in the vertical direction, and the inner mold is provided with a deaeration hole. It consists of an air pipe connected to the mold, a pot attached to the air pipe, a pump connected to the pot for sucking and supplying air, and an outer mold divided into an inner and outer part. A shoe manufacturing device characterized by: