A shoe upper gluing apparatus and method

Abstract

The application provides a vamp gluing device and method, and belongs to the field of shoemaking. The device comprises a main glue gun, an auxiliary glue gun, a third glue gun, a blowing assembly and a baffle assembly. The auxiliary glue gun is arranged at an adjustable inclination angle. The main glue gun is horizontally arranged and located below the auxiliary glue gun. The baffle assembly is arranged in front of the main glue gun and can be retracted backward. The third glue gun is horizontally arranged and located below the baffle assembly. The blowing assembly is arranged below the third glue gun. The application can avoid glue overflow or convex points at the toe of the shoe and effectively improve the gluing effect.

Description

A shoe upper gluing device and method Technical Field

[0001] This invention relates to the field of shoemaking, and in particular to a shoe upper gluing device and method. Background Technology

[0002] In footwear production, the gluing process for shoe uppers is a crucial and complex step, serving as a key step in bonding the upper to the sole. Traditional shoe upper gluing processes are all done manually. This manual operation not only suffers from low production efficiency and inconsistent quality, but also poses health risks to workers due to the presence of toxic components in the adhesives.

[0003] To address these issues, using robots for glue application has become the primary method. However, existing glue application trajectories have an angle at the connection between the shoe edge and toe tracks. Since the shoe uppers are manually lasted, the toe area is prone to misalignment. This results in inconsistent spray distances even when following a standard trajectory, leading to glue overflow at the toe. Furthermore, the toe area is typically where fabric seams are joined, and loose threads at these seams can affect airflow at the glue nozzle, causing bumps and impacting the glue application effect. Summary of the Invention

[0004] The main objective of this invention is to provide a shoe upper gluing device and method that can avoid glue overflow or bumps at the toe of the shoe, thereby effectively improving the gluing effect.

[0005] This invention is achieved through the following technical solution:

[0006] A shoe upper gluing device includes a main glue gun, a secondary glue gun, a third glue gun, an air blowing assembly, and a baffle assembly. The secondary glue gun is arranged with an adjustable tilt angle. The main glue gun is arranged horizontally and located below the secondary glue gun. The baffle assembly is recessed and located in front of the main glue gun. The third glue gun is arranged horizontally and located below the baffle assembly. The air blowing assembly is located below the third glue gun. The gluing trajectory is divided into a shoe perimeter trajectory and a shoe toe trajectory. During gluing, the main glue gun sprays glue according to the shoe perimeter trajectory. The baffle assembly adheres to the shoe upper and moves along the shoe perimeter trajectory to block excess glue sprayed by the main glue gun. The secondary glue gun is used to fill in the insufficient glue width at the upper seam and the bottom. The third glue gun applies glue according to the shoe toe trajectory. After the third glue gun operates for a period of time, the air blowing assembly tilts upward to blow away the glue already applied to the shoe toe. By using a main glue gun with better edge precision and a secondary glue gun with a wider glue width for spraying glue around the shoe, sufficient glue width around the shoe can be ensured. The baffle assembly can prevent excess glue sprayed from the main glue gun from falling onto the shoe surface and prevent glue already sprayed on the shoe surface according to the shoe circumference from flowing downwards. For the toe area, a third glue gun is used for dotting, and an air blowing assembly is used to spread the glue. The main glue sprayer does not need to adjust its posture to spray glue on the toe area, thus avoiding glue overflow caused by robot posture distortion. Moreover, the combination of dotting and blowing is less affected by the toe seam than the glue spraying method, making the glue on the toe more uniform. In summary, this invention can effectively improve the glue application effect.

[0007] Furthermore, it also includes a support frame. The baffle assembly includes a baffle body mounted on the support frame via horizontally arranged elastic elements. The baffle body includes an upwardly inclined block, an upwardly inclined glue-blocking part located at the front end of the inclined block, and side plates located on both sides of the glue-blocking part and the bottom plate. The outer side of the glue-blocking part is an outwardly protruding inclined surface. The baffle assembly has a reasonable and reliable structure and can effectively achieve the glue-blocking effect. Moreover, the baffle assembly can be retracted backward, making it adaptable to various shoe uppers and highly versatile.

[0008] Furthermore, the baffle assembly has a recess of 2-4mm, the highest point of the baffle body is 5-7mm from the axis of the main glue gun, and the upper edge of the baffle body does not exceed the shoe's circumference. This configuration ensures better glue application.

[0009] Furthermore, the atomizing air pressure of the main glue gun is 0.05-0.2 MPa, the atomizing air pressure of the auxiliary glue gun is lower than that of the main glue gun, and the air pressure of the blowing assembly is 0.3-0.8 MPa. This configuration avoids interference between the auxiliary glue gun and the main glue gun, ensuring better glue application results.

[0010] Furthermore, the blowing assembly is tilted upwards to blow air, and the angle between the blowing direction and the horizontal direction is between 50° and 80°. The blowing effect is best within this angle range.

[0011] Furthermore, the blowing assembly includes an air chamber, an air inlet, and an air inlet. The front section of the air chamber is inclined downwards, the air inlet is located in the front section of the air chamber and extends laterally, and the air inlet is connected to the air chamber, which can effectively improve the blowing efficiency and blowing quality.

[0012] Furthermore, after obtaining the adhesive application trajectory, a sub-trajectory corresponding to the toe area is extracted. This sub-trajectory is then shrunk inward by 1-3mm to obtain the inner trajectory. The toe trajectory is formed by this sub-trajectory and the inner trajectory. The adhesive application trajectory after extracting the sub-trajectory is the circumferential trajectory. By dividing the complete adhesive application trajectory into the toe trajectory and the circumferential trajectory, and then using different adhesive application methods based on the toe trajectory and the circumferential trajectory respectively, the adhesive application quality can be effectively improved.

[0013] Furthermore, the third glue gun is a dispensing gun or a spray gun suitable for dispensing glue.

[0014] This invention is also achieved through the following technical solutions:

[0015] The shoe upper gluing method based on the shoe upper gluing device described in any of the preceding claims includes the following steps:

[0016] Step S1: Obtain the glue application trajectory, extract the sub-trajectory corresponding to the toe part of the glue application trajectory, shrink the sub-trajectory inward by 1-3mm to obtain the inner trajectory, and form the toe trajectory by the sub-trajectory and the inner trajectory;

[0017] Step S2: Control the baffle assembly to fit the shoe upper and move along the shoe circumference. At the same time, the main glue gun sprays glue according to the shoe circumference. During the glue spraying process, the auxiliary glue gun fills in the insufficient glue width of the upper seam and the bottom.

[0018] Step S3: The third glue gun applies glue to the toe of the shoe following the toe trajectory. After the third glue gun has been in motion for a period of time, the air blowing component tilts upward to blow away the glue that has been applied to the toe of the shoe.

[0019] As can be seen from the above description of the present invention, compared with the prior art, the present invention has the following beneficial effects:

[0020] The glue application trajectory is divided into the shoe perimeter trajectory and the shoe toe trajectory. During glue application, the main glue gun sprays glue according to the shoe perimeter trajectory. The baffle assembly adheres to the shoe upper and moves along the shoe perimeter trajectory to block excess glue sprayed by the main glue gun. The secondary glue gun is used to fill in the insufficient glue width at the shoe upper seam and the bottom. The third glue gun applies glue according to the shoe toe trajectory. After the third glue gun has been in motion for a period of time, the air blowing assembly tilts upward to blow away the glue already applied to the shoe toe. By using a main glue gun with better edge precision and a secondary glue gun with a wider glue width for circumferential glue application, sufficient glue width around the shoe can be ensured. The baffle assembly prevents excess glue sprayed from the main glue gun from falling onto the shoe surface and avoids glue already sprayed along the circumferential trajectory from flowing downwards. For the toe area, a third glue gun is used for dispensing, and an air blowing component disperses the glue. The main glue gun does not need to adjust its posture for spraying glue at the toe area, thus avoiding glue overflow caused by robot posture distortion. Moreover, the combination of dispensing and blowing is less affected by the toe seam compared to spraying glue, resulting in more even glue application at the toe. In summary, this invention can effectively improve the glue application effect. The baffle assembly has a reasonable and reliable structure, effectively achieving the glue blocking effect; and the baffle assembly can be retracted to adapt to various shoe uppers, making it highly versatile. Attached Figure Description

[0021] The present invention will be further described in detail below with reference to the accompanying drawings and specific embodiments.

[0022] Figure 1 is a schematic diagram of the adhesive application device of the present invention.

[0023] Figure 2 is another structural schematic diagram of the adhesive application device of the present invention.

[0024] Figure 3 is another structural schematic diagram of the adhesive application device of the present invention (showing the baffle body).

[0025] Figure 4 is an enlarged view of part A in Figure 3.

[0026] Figure 5 is a schematic diagram of the air blowing assembly of the present invention.

[0027] Figure 6 is a schematic diagram of the adhesive application trajectory of the present invention.

[0028] Figure 7 is a schematic diagram of the toe trajectory of the shoe according to the present invention.

[0029] Figure 8 is a schematic diagram of the state of the baffle body of the present invention being in contact with the shoe upper while walking.

[0030] Figure 9 is a schematic diagram of the operation of the third glue gun and the air blowing assembly of the present invention.

[0031] Figure 10 is a schematic diagram of the angle between the blowing direction and the horizontal direction of the blowing assembly of the present invention.

[0032] Figure 11 is a schematic diagram of the toe shaping after the upper of the shoe is glued according to the present invention.

[0033] Figure 12 is a schematic diagram of detecting excess glue on the glued part of the shoe toe after the air is blown in according to the present invention.

[0034] Among them, 1. bracket; 11. horizontal platform; 12. first vertical plate; 13. second vertical plate; 14. connecting part; 15. waist-shaped hole; 16. auxiliary glue gun mounting block; 17. fixing block; 18. slide rail; 19. slider; 110. telescopic block; 111. elastic element; 112. groove; 113. mounting part; 2. auxiliary glue gun; 3. main glue gun; 4. third glue gun; 5. air blowing assembly; 51. air chamber; 52. air blowing port; 53. air inlet; 6. baffle assembly; 611. inclined block; 612. glue blocking part; 6121. inclined surface; 613. side plate. Detailed Implementation

[0035] The present invention will be further described below through specific embodiments.

[0036] As shown in Figures 1 to 3, the shoe upper gluing device includes a bracket 1, a secondary glue gun 2, a main glue gun 3, a third glue gun 4, an air blowing assembly 5, and a baffle assembly 6. The bracket 1 includes a horizontal platform 11, a first vertical plate 12 and a second vertical plate 13 disposed on both sides of the horizontal platform 11, a connecting part 14 disposed on the first vertical plate 12 and connected to the robot arm, two parallel oblong holes 15 spaced apart on the second vertical plate 13, a secondary glue gun mounting block 16 obliquely fixed to the second vertical plate 13 by bolts passing through the oblong holes 15, a fixing block 17 disposed at the lower end of the horizontal platform 11, a slide rail 18 disposed on the fixing block 17 and extending horizontally forward, a slider 19 matching the slide rail 18, a telescopic block 110 horizontally disposed on the slider 19, and an elastic element 111 horizontally disposed between the telescopic block 110 and the fixing block 17. The oblong holes 15 are arranged obliquely forward from bottom to top, and the secondary glue gun 2 is fixed to the lower end of the secondary glue gun mounting block 16 by bolts to achieve an adjustable tilt angle. A groove 112 is formed on the horizontal platform 11, corresponding to the position of the auxiliary glue gun 2. The main glue gun 3 is set in the groove 112 and locked to the horizontal platform 11 by screws, and is located below the auxiliary glue gun 2. The telescopic block 110 has a higher mounting part 113 at its front end. The baffle assembly 6 is fixed to the front end of the mounting part 113 to achieve a rearward setting in front of the main glue gun 3. The third glue gun 4 is fixed to the lower end of the telescopic block 110 and is located below the baffle assembly 6. The air blowing assembly 5 is located below the third glue gun 4. The glue application trajectory is divided into the shoe perimeter trajectory and the shoe toe trajectory. During glue application, the main glue gun 3 sprays glue according to the shoe perimeter trajectory. The baffle assembly 6 conforms to the shoe upper and moves along the shoe perimeter trajectory to block the excess glue sprayed by the main glue gun 3. The auxiliary glue gun 2 is used to fill in the insufficient glue width of the shoe upper seam and the bottom. The third glue gun 4 applies glue according to the shoe toe trajectory. After the third glue gun 4 moves for a period of time (e.g., 100ms), the air blowing assembly 5 tilts upward to blow away the glue already applied to the shoe toe. Among them, the main glue gun 3 and the auxiliary glue gun 2 are glue spray guns, and the third glue gun 4 is a glue dispensing gun or a glue spray gun.

[0037] The secondary glue gun 2 is used to fill in any gaps in the glue width at the upper seams and sole. Specifically, the glue width of the main glue gun 3 is 10-12mm. After spraying with the secondary glue gun 2 off, check the glue gaps at the upper seams. Depending on the actual condition of the upper, adjust the secondary glue gun 2 to between 30° and 80°, with a glue width of 12-18mm, to fill in the areas that the main gun cannot reach.

[0038] As shown in Figure 4, the baffle assembly 6 includes a baffle body, which includes an upwardly inclined block 611, an upwardly inclined adhesive-blocking part 612 disposed at the front end of the inclined block 611, and side plates 613 disposed on both sides of the adhesive-blocking part 612 and the inclined block 611. The outer surface of the adhesive-blocking part 612 is an outwardly protruding inclined surface 6121. The inclined block 611 is locked to the front end of the mounting part 113 by bolts.

[0039] As shown in Figure 5, the air blowing assembly 5 includes an air chamber 51, an air blowing port 52, and an air inlet 53. The front section of the air chamber 51 is inclined downward, the air blowing port 52 is located at the front section of the air chamber 51 and extends laterally, and the air inlet 53 is connected to the air chamber 51. The air blowing port 52 can be arc-shaped, straight, or T-shaped. In this embodiment, the air blowing port 52 is arc-shaped.

[0040] In this embodiment, the third glue gun 4 is a dispensing gun. In other embodiments, the third glue gun 4 can also be a spray gun or a coating gun. The atomizing air pressure of the main glue gun 3 is 0.05-0.12 MPa, and the atomizing air pressure of the auxiliary glue gun 2 is lower than that of the main glue gun 3 to avoid interfering with the main glue gun 3. The air pressure of the blowing assembly 5 is 0.4 MPa, and this blowing air pressure can be adjusted according to the material of the shoe upper and the splicing surface.

[0041] The adhesive application method based on the above-mentioned adhesive application device includes the following steps:

[0042] Step S1: Obtain the glue application trajectory, extract the sub-trajectory corresponding to the toe part of the glue application trajectory, shrink the sub-trajectory inward by 1-3mm to obtain the inner trajectory, and form the toe trajectory by the sub-trajectory and the inner trajectory;

[0043] The adhesive application trajectory is shown in Figure 6. The process of obtaining the adhesive application trajectory is existing technology. After obtaining the adhesive application trajectory, each trajectory point is traversed, and two curvature radius inflection points are calculated. The application trajectory between the two inflection points is taken as the sub-trajectory of the corresponding toe part. This sub-trajectory is shrunk inward by 1-3mm to obtain the inner trajectory (the specific inward shrinkage size needs to be determined by comprehensively considering the amount of glue and the adhesive application effect, and can be determined through a limited number of experiments). The toe trajectory shown in Figure 7 is formed by this sub-trajectory and the inner trajectory. The adhesive application trajectory after extracting the sub-trajectory is the circumferential trajectory of the shoe. Among these, the process of calculating the curvature radius inflection points is existing technology.

[0044] Step S2: Control the baffle assembly 6 to fit the shoe upper and move along the shoe circumference trajectory. At the same time, the main glue gun 3 sprays glue according to the shoe circumference trajectory. During the glue spraying process, the auxiliary glue gun 2 fills in the insufficient glue width of the shoe upper seam and the bottom.

[0045] In this embodiment, the indentation of the baffle assembly 6 is 3mm, the straight-line distance between the highest point of the baffle body (i.e., the highest point of the glue-blocking part 612) and the axis of the main glue gun 3 is 6mm, and the upper edge of the baffle body (i.e., the upper edge of the glue-blocking part 612) does not exceed the shoe circumference trajectory. Figure 8 shows a schematic diagram of the baffle body conforming to the shoe upper during walking.

[0046] In step S3, the third glue gun 4 applies glue to the toe of the shoe following the toe trajectory. After the third glue gun 4 has been in motion for a period of time, the air blowing component 5 tilts upwards and blows the glue applied to the toe of the shoe away. The specific control process of the robot controlling the main glue gun 3, the auxiliary glue gun 2, the baffle assembly 6, the third glue gun 4, and the air blowing component 5 is existing technology.

[0047] Step S4: After blowing air, check if there is any excess glue on the glued part of the toe.

[0048] As shown in Figures 9 and 10, the air blowing component 5 is tilted upwards to blow air. The angle between the blowing direction and the horizontal direction (spray gun direction) is between 50° and 80°, depending on the material of the shoe upper and the requirements of the splicing surface. In this embodiment, the angle is 62°. The blowing distance is set to 20mm.

[0049] As shown in Figure 11, there are no defects such as excess glue or bumps on the toe area.

[0050] Figure 12 shows a process image of glue overflow detection. The specific process of glue overflow detection can be achieved using existing technology.

[0051] In this invention, the terms "first," "second," and "third," etc., are used only to distinguish similar objects and are not necessarily used to describe a specific order or sequence, nor should they be construed as indicating or implying relative importance. The use of terms such as "upper," "lower," "left," "right," "front," and "rear" to indicate orientation or positional relationships is based on the orientation or positional relationships shown in the accompanying drawings and is only for the convenience of describing the invention, not to indicate or imply that the device referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, it should not be construed as a limitation on the scope of protection of this invention. Those skilled in the art can understand the specific meaning of the above terms in this application according to the specific circumstances.

[0052] Furthermore, in the description of this application, unless otherwise stated, "multiple" means two or more. "And / or" describes the relationship between related objects, indicating that three relationships can exist. For example, A and / or B can represent: A alone, A and B simultaneously, or B alone. The character " / " generally indicates that the preceding and following related objects have an "or" relationship.

[0053] The above are merely specific embodiments of the present invention, but the design concept of the present invention is not limited thereto. Any non-substantial modifications made to the present invention using this concept shall be considered as infringing upon the protection scope of the present invention.

Claims

1. A shoe upper gluing device, characterized in that: The system includes a main glue gun, a secondary glue gun, a third glue gun, an air blowing assembly, and a baffle assembly. The secondary glue gun is arranged with an adjustable tilt angle. The main glue gun is horizontally arranged and located below the secondary glue gun. The baffle assembly is recessed and located in front of the main glue gun. The third glue gun is horizontally arranged and located below the baffle assembly. The air blowing assembly is located below the third glue gun. The glue application trajectory is divided into a shoe perimeter trajectory and a shoe toe trajectory. The main glue gun sprays glue according to the shoe perimeter trajectory. The secondary glue gun is used to fill in the insufficient glue width at the upper seam and the bottom. The third glue gun applies glue according to the shoe toe trajectory. The system also includes a support frame. The baffle assembly includes a baffle body mounted on the support frame via a horizontally arranged elastic element. The baffle body includes an upwardly inclined block, a glue-blocking part located at the front end of the inclined block and also inclined upwards, and side plates located on both sides of the glue-blocking part and the bottom plate. The outer side of the glue-blocking part is an outwardly protruding inclined surface.

2. The shoe upper gluing device according to claim 1, characterized in that: The baffle assembly has a recess of 2-4mm, the highest point of the baffle body is 5-7mm away from the axis of the main glue gun, and the upper edge of the baffle body does not exceed the shoe circumference.

3. The shoe upper gluing device according to claim 1, characterized in that: The atomizing air pressure of the main glue gun is 0.05-0.2 MPa, the atomizing air pressure of the auxiliary glue gun is lower than that of the main glue gun, and the air pressure of the blowing assembly is 0.3-0.8 MPa.

4. A shoe upper gluing device according to claim 1, 2, or 3, characterized in that: The air blowing assembly is tilted upwards to blow air, and the angle between the blowing direction and the horizontal direction is between 50° and 80°.

5. A shoe upper gluing device according to claim 1, 2, or 3, characterized in that: The air blowing assembly includes an air chamber, an air blowing port, and an air inlet. The front section of the air chamber is inclined downward, the air blowing port is located in the front section of the air chamber and extends laterally, and the air inlet is connected to the air chamber.

6. A shoe upper gluing device according to claim 1, 2, or 3, characterized in that: After obtaining the glue application trajectory, the sub-trajectory corresponding to the toe part of the glue application trajectory is extracted, and the sub-trajectory is shrunk inward by 1-3mm to obtain the inner trajectory. The toe trajectory is formed by the sub-trajectory and the inner trajectory. The glue application trajectory after extracting the sub-trajectory is the shoe perimeter trajectory.

7. A shoe upper gluing device according to claim 1, 2, or 3, characterized in that: The third glue gun is a dispensing gun.

8. A method for applying adhesive to a shoe upper based on the shoe upper adhesive application device according to any one of claims 1-7, characterized in that: The process includes the following steps: Step S1: Obtain the glue application trajectory, extract the sub-trajectory corresponding to the toe area of ​​the glue application trajectory, shrink the sub-trajectory inward by 1-3mm to obtain the inner trajectory, and form the toe trajectory from the sub-trajectory and the inner trajectory; Step S2: Control the baffle assembly to adhere to the upper and move along the circumferential trajectory of the shoe, while the main glue gun sprays glue according to the circumferential trajectory of the shoe. During the glue spraying process, the auxiliary glue gun fills in the insufficient glue width at the upper seam and the bottom; Step S3: The third glue gun applies glue to the toe according to the toe trajectory of the shoe. After the third glue gun has been in motion for a period of time, the blowing assembly tilts upward to blow away the glue already applied to the toe.

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