CN118161009A - Sole glue production process - Google Patents

Abstract

A process for attaching glue to a sole is suitable for attaching glue to a sole, wherein the sole includes a midsole surface, and the process for attaching glue to a sole comprises the following steps: (A) obtaining the shape of the midsole surface through a sampling device, generating a preset pattern whose contour corresponds to the shape of the midsole surface and whose area is the same as that of the midsole surface, and then preparing a mold according to the preset pattern, (B) brushing the glue on the mold, (C) standing for a period of time, and then cooling the mold to a degumming temperature, (D) pressing the mold with the side of the mold with the glue attached to the sole, and (E) removing the mold so that the glue is attached to the sole and separated from the mold. Therefore, the glue can be attached to the sole in a stable, highly repeatable and easy-to-operate manner, thereby improving product quality and reducing energy consumption.

Description

Sole glue production process

Technical Field

The invention relates to a shoe manufacturing process, in particular to a shoe sole gluing process.

Background technique

Generally, when the upper and the sole are glued together, the upper needs to be drawn according to the contour of the sole side to draw the glue coating reference line. The sole is a multi-curvature three-dimensional model, which requires a high uniformity in the thickness of the glue coating. Currently, the industry mostly relies on skilled workers to perform the above operation manually.

However, when applying the glue, it is still inevitable that the glue amount will overflow the reference line, resulting in too much glue, which will affect the appearance, or the glue amount will be too low when it is below the reference line, which will cause the sole and upper to separate or the tensile strength to be insufficient. Furthermore, in order to facilitate brushing, the glue generally contains a highly fluid solvent, so the shoe material still needs to go through a drying process after being brushed with glue to volatilize the solvent components in the glue to ensure its effectiveness. The drying process generally uses a conveyor belt to pass through multiple drying equipment to use a certain temperature for a long time to ensure the volatilization of the solvent. The drying equipment not only consumes a huge amount of energy, but also occupies a large area and must be equipped with corresponding manpower. The gluing process of shoe materials is a key process that determines the quality of shoemaking in the shoe production line, so the problems of poor product quality and energy consumption derived from the aforementioned unstable gluing still need to be further overcome.

Summary of the invention

The object of the present invention is to provide a process for gluing the sole of a shoe which can improve product quality, reduce energy consumption and is easy to operate.

The process of attaching adhesive to the sole of the present invention is suitable for attaching adhesive to the sole of the shoe, wherein the sole has a midsole surface, the midsole surface has a sole area corresponding to the sole of the human foot, and a side wall area connected to the outer periphery of the sole area. The process of attaching adhesive to the sole of the shoe comprises the following steps:

(A) obtaining the shape of the midsole surface by a sampling device, generating a preset pattern whose contour corresponds to the shape of the midsole surface and whose area is the same as that of the midsole surface, and then preparing a mold according to the preset pattern, (B) coating the adhesive on the mold, (C) allowing the mold to stand for a period of time, and then cooling the mold to a degumming temperature, (D) pressing the mold with the side of the mold with the adhesive attached to the sole so that the adhesive adheres to the sole, and (E) removing the mold to separate the adhesive from the mold.

In the process of attaching glue to the sole of the present invention, the sampling device includes an image capturing unit and a pattern generating unit connected to the image capturing unit by signal.

In the process of attaching glue to the sole of the present invention, the mold comprises a base portion and a transfer portion protruding from the top surface of the base portion in the height direction and used to carry the glue, and the outer contour of the transfer portion corresponds to the preset pattern.

In the process for attaching glue to the sole of the present invention, the thickness of the transfer portion in the height direction is 1 to 2 mm.

In the process of attaching glue to the sole of the present invention, in the step (C), the standing time is 10 seconds.

In the process for gluing the sole of the present invention, in the step (C), the mold is placed in a room temperature environment and cooled to the degumming temperature.

In the process for gluing the sole of the present invention, in the step (C), a fan is used to cool the mold to the degumming temperature.

In the sole gluing process of the present invention, the degumming temperature is room temperature.

In the process for gluing the sole of the present invention, in the step (D), the sole is first heated to a gluing temperature before the mold and the sole are pressed together.

In the process for attaching glue to the sole of the present invention, the temperature for attaching glue is 55°C.

The beneficial effects of the present invention are as follows: through the aforementioned adhesive attachment process, the adhesive can be attached to the sole in a stable, highly repeatable and easy-to-operate manner, avoiding the problem of excessive, insufficient, different or uneven adhesive coating caused by direct manual coating, and there is no need to go through a drying process to volatilize the solvent components in the adhesive, thereby achieving the effects of improving product quality, reducing energy consumption and facilitating operation.

BRIEF DESCRIPTION OF THE DRAWINGS

Other features and effects of the present invention will be clearly presented in the embodiments with reference to the accompanying drawings, in which:

FIG1 is a flow chart illustrating an embodiment of a process for attaching glue to a sole of the present invention;

FIG2 is a three-dimensional schematic diagram of the embodiment, illustrating a process of generating a preset pattern;

FIG3 is a perspective view illustrating a situation where an adhesive is applied to a mold;

Fig. 4 is a front view showing the adhesive on the mold facing a sole;

FIG5 is a cross-sectional view illustrating the pressing of the mold and the adhesive with the sole; and

FIG. 6 is a perspective view illustrating the adhesive being attached to the sole.

Detailed ways

Referring to FIG. 1 , FIG. 2 , and FIG. 3 , an embodiment of the process for attaching adhesive to a sole of the present invention is applicable to attaching an adhesive 5 to a sole of the shoe 6, wherein the sole of the shoe 6 comprises a midsole surface 61, wherein the midsole surface 61 has a sole area 611 corresponding to the sole of a human foot, and a side wall area 612 connected to the outer periphery of the sole area 611 and covering the sole area 611 inwardly. The process for attaching adhesive to the sole comprises the following steps:

Step 21: Capture the shape of the midsole surface 61 of the sole 6 through a sampling device 3. The sampling device 3 includes an image capture unit 31 and a pattern generation unit 32 connected to the image capture unit 31. In this embodiment, the image capture unit 31 is a camera lens, and the pattern generation unit 32 is a computer and a drawing software installed on the computer. In other embodiments, other equivalent components that can capture and calculate the area and shape of the midsole surface 61 can also be selected according to needs, and are not limited to this.

Step 22: Using the results captured by the sampling device 3, a preset pattern 33 is generated, which has a contour corresponding to the shape of the mid-bottom surface 61 and has the same area as the mid-bottom surface 61 and is in a plane. In more detail, in this embodiment, the sole area 611 and the side wall area 612 are at an angle, and in other embodiments, they may also be parallel, and the sampling device 3 may capture and calculate the sum of the inner surface areas of the sole area 611 and the side wall area 612 to generate the preset pattern 33 in a plane.

Step 23: Prepare a mold 4, the mold 4 includes a base portion 41, and a transfer portion 42 protruding from the top surface of the base portion 41 along a height direction and used to carry the adhesive 5, the outer contour of the transfer portion 42 corresponds to the preset pattern 33, and the thickness in the height direction is 1 to 2 mm. In this embodiment, the mold 4 is made of silicone. In other embodiments, other durable materials can also be selected according to needs, without limitation.

Step 24: Apply the adhesive 5 on the transfer part 42. In this embodiment, the adhesive 5 is applied on the transfer part 42 by a roller coating machine, and then the adhesive 5 is evenly distributed on the transfer part 42 by itself due to its fluidity when it is just applied. In other embodiments, other methods and machines (such as brushing or spraying, etc.) that can stably and evenly apply the adhesive 5 can also be selected, and the invention is not limited thereto. It should be noted that in this embodiment, the thickness of the adhesive 5 on the transfer part 42 is 0.3-0.5 mm, and the weight is less than 5 grams.

Referring to FIG. 1 , FIG. 4 , and FIG. 5 , step 25: standing for a period of time, and then cooling the mold 4 to a degumming temperature. The degumming temperature is room temperature. More specifically, the standing time is 10 seconds. In this embodiment, the mold 4 is placed in a room temperature environment for 4 to 6 minutes to cool to the degumming temperature, or is cooled by a fan for 2 to 3 minutes.

Step 26: The sole 6 is heated to a temperature for adhesive bonding, and the surface of the transfer portion 42 with the adhesive 5 is pressed toward the sole 6, so that the adhesive 5 is attached to the sole 6. It is worth mentioning that the adhesive bonding temperature is 55-58°C, and the adhesive bonding temperature is preferably 55°C; in this embodiment, the pressing time is 10-20 seconds, and the time for heating to the adhesive bonding temperature is 10-15 seconds. In other embodiments, the pressing and heating time can also be adjusted according to the adhesive material and the sole 6 material, and is not limited thereto.

Referring to Fig. 1, Fig. 5 and Fig. 6, step 27: remove the mold 4 to separate the adhesive 5 from the transfer portion 42. It should be noted that in this embodiment, moisture-reactive hot melt adhesive (PUR) is used, which has a higher adhesive force at 55°C and a lower adhesive force at room temperature, so when the sole 6 is heated to 55°C, the adhesive 5 can be firmly attached to the sole 6 and can be easily separated from the mold 4 at room temperature.

After the above steps, the adhesive 5 can be applied to the sole 6, and then it only needs to be activated by ultraviolet light, heating or humidification according to the properties of the adhesive 5, and can be used for other processes such as pasting the upper.

Compared with the existing glue coating technology, the present invention obtains the shape and area of the midsole surface 61 through the sampling device 3, so that the shape and area of the top surface of the transfer portion 42 of the mold 4 correspond to the shape and area of the midsole surface 61. Therefore, during pressing, the adhesive 5 will not be too large or too small for the midsole surface 61, and the contours are also corresponding, so that the adhesive 5 can be attached to the sole 6 in a stable, highly repeatable and easy-to-operate manner, avoiding the problem of excessive, insufficient, different or uneven application of adhesive material caused by direct manual coating, and there is no need to go through a time-consuming, energy-intensive, large-area and manpower-intensive drying process to volatilize the solvent components in the adhesive 5, thereby achieving the effect of improving product quality and reducing energy consumption; in addition, avoiding the use of volatile solvents (such as toluene) can also prevent workers from inhaling harmful gases and reduce the emission of harmful gases, thereby achieving the effect of improving work safety and reducing pollution.

In summary, the process for attaching glue to the sole of the present invention can indeed achieve the purpose of the present invention.

Claims (10)

1. A process for attaching glue to a sole, which is suitable for attaching glue to a sole, wherein the sole includes a midsole surface, and the process for attaching glue to the sole comprises the following steps: (A) obtaining the shape of the midsole surface by a sampling device, generating a preset pattern whose contour corresponds to the shape of the midsole surface and whose area is the same as that of the midsole surface, and then preparing a mold according to the preset pattern, (B) coating the glue on the mold, (C) leaving it to stand for a period of time, and then cooling the mold to a degumming temperature, (D) pressing the mold with a side of the mold with the glue attached to the sole to attach the glue to the sole, and (E) removing the mold to separate the glue from the mold. 2. The process for attaching glue to the sole of a shoe according to claim 1, wherein the sampling device comprises an image capturing unit and a pattern generating unit connected to the image capturing unit by a signal. 3. The process for attaching glue to the sole according to claim 1 is characterized in that: the mold includes a base portion, and a transfer portion protruding from the top surface of the base portion in the height direction and used to carry the adhesive, and the outer contour of the transfer portion corresponds to the preset pattern. 4 . The process for attaching glue to the sole according to claim 3 , wherein the thickness of the transfer portion in the height direction is 1 to 2 mm. 5. The process for attaching glue to the sole according to claim 1, characterized in that: in the step (C), the standing time is 10 seconds. 6. The process for gluing the soles of shoes according to claim 1, characterized in that: in the step (C), the mold is cooled to the degumming temperature by placing it in a room temperature environment. 7. The process for gluing the soles of shoes according to claim 1, characterized in that: in the step (C), a fan is used to cool the mold to the degumming temperature. 8. The process for gluing the soles of shoes according to claim 1, characterized in that the degumming temperature is room temperature. 9. The process for gluing the sole according to claim 1, characterized in that: in the step (D), before the mold and the sole are pressed together, the sole is first heated to a gluing temperature. 10. The process for gluing the soles according to claim 9, characterized in that the gluing temperature is 55°C.