Partitioned dynamic pressure regulation vacuum gluing device

Abstract

The present invention relates to a zoned dynamic pressure-regulated vacuum gluing device, comprising a workbench, a vacuum adsorption mechanism disposed within the workbench cavity, a contouring mechanism for forming a contouring cavity above the vacuum adsorption mechanism, and a glue rolling assembly for rolling glue onto leather. The present invention relates to the field of gluing technology. In the zoned dynamic pressure-regulated vacuum gluing device, an operator spreads leather flat on the surface of a current contouring sheet. A vacuum boss evacuates nine independent vacuum cavities via vacuum pipes, causing the leather to be adsorbed and adhere to the contouring sheet surface. A partition plate transmits the adsorption force to separate zones, and the negative pressure of each vacuum cavity is adjusted according to the thickness of the leather to ensure smooth overall adsorption. During the glue rolling phase, the glue rolling assembly moves along the contouring sheet, with the glue roller contacting only the leather area not recessed by the contouring groove. The leather at the contouring groove sinks 1-3 mm due to vacuum adsorption, forming a safe gap with the glue roller, completely preventing glue contact.

Description

Technical Field

[0001] The invention relates to the technical field of gluing, in particular to a vacuum gluing device with zoned dynamic pressure regulation. Background Art

[0002] In the manufacturing process of leather products (such as shoe uppers, luggage, and furniture), gluing is a critical step, directly affecting the product's fit and appearance quality. Traditional vacuum gluing equipment typically uses a fixed contouring mold. After vacuuming the leather, a glue roller assembly applies glue to the non-contacting areas. However, existing technology has the following significant drawbacks:

[0003] Poor mold adaptability: Fixed profiling molds can only adapt to a single shape of leather. When changing products, the mold needs to be completely disassembled, which is time-consuming and labor-intensive, resulting in low production efficiency.

[0004] Serious glue waste: The boundary between the contoured area and the non-contacted area is not precise enough. Glue often seeps into the non-glueized area due to loose mold edges, resulting in glue waste (usually as high as 25% to 40%).

[0005] Uneven adsorption force: The traditional vacuum adsorption chamber has a single cavity structure and cannot dynamically adjust the local adsorption force according to the thickness or material difference of the leather. This can easily lead to deformation of thin leather or weak adsorption of thick leather.

[0006] High mold storage costs: A large number of contour molds of different shapes need to be pre-processed and stored, which takes up storage space and increases management costs. Summary of the Invention

[0007] In view of the deficiencies of the prior art, the present invention provides a zoned dynamic pressure regulating vacuum gluing device to solve the above-mentioned problems.

[0008] To achieve the above objectives, the present invention is implemented through the following technical solutions: a zoned dynamic pressure-regulated vacuum gluing device, comprising a workbench, a vacuum adsorption mechanism disposed in an inner cavity of the workbench, a profiling mechanism for forming a profiling cavity above the vacuum adsorption mechanism, and a gluing assembly for gluing leather, wherein the vacuum adsorption mechanism comprises a vacuum boss that is driven by a driving mechanism to slide within an inner groove provided on the surface of the workbench, and an opening is provided above the vacuum boss;

[0009] The profiling mechanism includes two driving rollers rotatably arranged on both sides of the workbench and a laser cutting assembly arranged above the workbench. The surfaces of the two driving rollers are connected to the profiling assembly in a transmission manner. The profiling assembly includes at least three profiling sheets connected by connecting sheets. The surfaces of the profiling sheets are cut with profiling grooves by the laser cutting assembly. The four sides of the profiling sheets are fixedly connected with downwardly protruding extrusion frames. The profiling sheets are located above the opening of the vacuum boss, and the surface of the profiling sheets is provided with vacuum holes.

[0010] The side of the vacuum boss is provided with a rectangular groove adapted to the extrusion frame, and the four sides of the vacuum boss are slidably connected to an external limit plate driven by a cylinder, and the side of the external limit plate is fixedly connected to an extrusion plate abutting the extrusion frame. When in use, the leather is placed on the profiling piece adsorbed by the vacuum boss, and then suction is applied through the vacuum chamber for adsorption. The leather is adsorbed, and then the leather above the profiling groove is concave. At this time, the surface of the leather is coated with glue by the movement of the glue rolling component. The surface at the profiling groove is not coated, and the leather that needs to be rolled with glue is spread flat on the vacuum boss. The densely distributed vacuum holes on the profiling piece adsorbed by the vacuum boss adsorb the surface, and the glue rolling component moves over the leather on the profiling piece. The leather on the profiling piece will be rolled with glue, and the profiling groove will not be rolled with glue, saving glue consumed during production, generally saving about 30%, and solving the risk of the leather with glue after rolling with glue bringing glue to the non-rolled glue surface during stitching. The new profiling piece can be cut out on site and replaced according to needs, which can be applied to a variety of leather materials for rolling rubber processing, thereby effectively improving the processing efficiency.

[0011] As a further solution of the present invention: the driving mechanism includes a lifting cylinder fixed in the inner cavity of the inner groove, and the vacuum boss driven by the lifting cylinder moves up and down to dock with the contoured piece.

[0012] As a further solution of the present invention: four external limiting plates form a hollow rectangular frame sleeved outside the rectangular groove, and the extruded frame is extruded through the hollow rectangular frame so that it is attached to the surface of the vacuum boss for effective positioning.

[0013] As a further solution of the present invention: the rubber rolling component is arranged above the vacuum boss and the contour sheet, and the rubber rolling component moves to roll the leather material adsorbed above the contour sheet.

[0014] As a further solution of the present invention: the inner cavity of the vacuum boss is divided into nine vacuum chambers by a partition plate, and each vacuum chamber is connected to the external vacuum through a vacuum pipe. The multiple vacuum chambers separated by the partition plate are set to adjust the adsorption force of the leather material, thereby realizing adjustable adsorption force.

[0015] As a further solution of the present invention: the workbench is provided with a through-type blanking chute below the laser cutting assembly. After the contoured sheet is cut into a contoured groove as needed, the fertilizer cut by the laser cutting assembly falls from the blanking chute.

[0016] As a further solution of the present invention: the surface of the profiling sheet is provided with profiling grooves or a complete plane, and the profiling groove structures on the surface of the profiling sheet with profiling grooves are different. The profiling grooves that have been opened can be used to perform rubber rolling processing on the adapted leather material. When the leather material with a new shape needs to be processed, the profiling sheet with a complete plane is cut on site by a laser cutting assembly to meet the processing needs, which is convenient and quick.

[0017] The core of this device is to achieve precise and efficient leather gluing through the coordinated control of dynamic reconstruction of the profiling sheet and zoned vacuum adsorption. The specific workflow is as follows:

[0018] 1. Leather adsorption and positioning stage

[0019] The operator spreads the leather material on the current profiling sheet surface, and the vacuum boss evacuates the nine independent vacuum chambers through the vacuum pipe, and the leather material is adsorbed and adhered to the profiling sheet surface;

[0020] The partition board transmits the adsorption force in different areas. According to the thickness of the leather material, the negative pressure value of each vacuum chamber is adjusted to ensure the overall adsorption is smooth.

[0021] 2. Rolling glue coating stage

[0022] The rubber roller assembly moves along the top of the profiling sheet, and the rubber roller only contacts the leather area that is not recessed by the profiling groove;

[0023] The leather material at the contoured groove sinks 1-3mm due to vacuum adsorption, forming a safe gap with the rubber roller, completely blocking the contact of glue.

[0024] 3. Contour sheet switching stage

[0025] Release the old profiling piece: the cylinder drives the external limit plate to retract, releasing the clamping of the extrusion frame; the lifting cylinder lowers the vacuum boss, and the profiling piece is released from the rectangular groove;

[0026] Loading new profiling sheet: The driving roller drives the connecting piece to move the preset complete flat profiling sheet to the bottom of the laser cutting assembly; the laser cutting head cuts a profiling groove adapted to the new leather material according to the preset path, and the waste material is discharged through the blanking chute;

[0027] Positioning and locking: The lifting cylinder raises the vacuum boss, and the extrusion frame is embedded in the rectangular groove; the cylinder of the external limit plate pushes the extrusion plate to clamp the frame, completing millimeter-level precise positioning.

[0028] 4. Adaptive Adjustment Verification

[0029] The system detects the adsorption force of each vacuum chamber through pressure sensors. If the adsorption force deviation in a certain area exceeds the set threshold, the valve opening of the corresponding vacuum pipeline is automatically adjusted to achieve dynamic balance.

[0030] Compared with the prior art, the present invention has the following beneficial effects:

[0031] Precise glue saving:

[0032] Laser cutting components are used to cut contour grooves on the contour sheet surface, ensuring that the groove shape perfectly matches the leather contour. The glue coating boundary accuracy is improved to ±0.2mm, and glue consumption is reduced by 30% to 35%;

[0033] The leather material at the contoured groove is vacuum-sucked and concave, and the glue rolling component only contacts the raised area, completely preventing glue from penetrating into the non-glue-coated area.

[0034] Dynamically adapt to a variety of leather materials:

[0035] The modular design of the profiling sheet allows for quick replacement of the drive rollers. Combined with the on-site processing capabilities of the laser cutting components, the preparation and installation of the new leather profiling groove can be completed within 10 minutes, increasing the adaptation efficiency by 80%.

[0036] Multiple vacuum chambers are independently controlled to dynamically adjust the adsorption force according to the thickness difference of the leather area to avoid deformation or displacement.

[0037] Stable positioning and fast switching:

[0038] The interlocking structure of the extruded frame and the rectangular groove, combined with the pneumatic extrusion of the external limiting plate, achieves millimeter-level precise positioning of the profiling piece and the vacuum boss;

[0039] The lifting cylinder drives the automatic docking of the vacuum boss and the contour piece. The switching process does not require manual intervention, and the equipment utilization rate is increased to 95%.

[0040] Efficient waste removal:

[0041] The blanking chute directly collects the waste generated by laser cutting to prevent the accumulation of debris that affects the sealing between the contour piece and the vacuum boss, and the maintenance cycle is extended to more than 500 hours. BRIEF DESCRIPTION OF THE DRAWINGS

[0042] Figure 1 It is a structural schematic diagram of the present invention;

[0043] Figure 2 A top view of the structure of the present invention;

[0044] Figure 3 For the present invention Figure 1 A partial enlarged view of point A in the middle;

[0045] Figure 4 A top view of the structure of the vacuum boss of the present invention;

[0046] Figure 5 For the present invention Figure 4 A partial enlarged view of point B in the middle.

[0047] In the figure: 1. Workbench; 2. Driving roller; 3. Profiling piece; 4. Extrusion frame; 5. Connecting piece; 6. Rolling rubber assembly; 7. Laser cutting assembly; 8. Profiling groove; 9. Inner groove; 10. Vacuum boss; 11. Partition plate; 12. Empty pipe; 13. Lifting cylinder; 14. Vacuum chamber; 15. External limit plate; 16. Extrusion plate; 17. Vacuum hole; 18. Rectangular groove; 19. Blanking chute. DETAILED DESCRIPTION

[0048] In order to further illustrate the technical means and effects adopted by the present invention to achieve the predetermined purpose of the invention, the specific implementation methods, structures, features and effects of the present invention are described in detail below in conjunction with the accompanying drawings and preferred embodiments.

[0049] See also Figure 1-5 The present invention provides a technical solution: a zoned dynamic pressure-regulated vacuum gluing device, comprising a workbench 1, a vacuum adsorption mechanism disposed in the inner cavity of the workbench 1, a profiling mechanism for forming a profiling cavity above the vacuum adsorption mechanism, and a gluing assembly 6 for gluing leather, wherein the vacuum adsorption mechanism comprises a vacuum boss 10 driven by a driving mechanism to slide within an inner groove 9 provided on the surface of the workbench 1, and an opening is provided above the vacuum boss 10;

[0050] The profiling mechanism includes two driving rollers 2 rotatably arranged on both sides of the workbench 1 and a laser cutting assembly 7 arranged above the workbench 1. The surfaces of the two driving rollers 2 are connected to the profiling assembly in a transmission manner. The profiling assembly includes at least three profiling sheets 3 connected by a connecting sheet 5. The surface of the profiling sheet 3 is cut with a profiling groove 8 by the laser cutting assembly 7. The four sides of the profiling sheet 3 are fixedly connected with a downwardly protruding extrusion frame 4. The profiling sheet 3 is located above the opening of the vacuum boss 10, and the surface of the profiling sheet 3 is provided with a vacuum hole 17.

[0051] The side of the vacuum boss 10 is provided with a rectangular groove 18 adapted to the extrusion frame 4. The four sides of the vacuum boss 10 are slidably connected to the external limit plate 15 driven by the cylinder. The side of the external limit plate 15 is fixedly connected to the extrusion plate 16 abutting the extrusion frame 4. When in use, the leather is placed on the top of the profiling sheet 3 adsorbed by the vacuum boss 10, and then the vacuum chamber 14 applies suction for adsorption. The leather is adsorbed, and then the leather above the profiling groove 8 is concave. At this time, the rubber roller assembly The movement of the component 6 is to apply glue to the surface of the leather material. The surface at the profiling groove 8 is not coated. The leather material that needs to be rolled with glue is spread on the vacuum boss 10. The vacuum holes 17 densely distributed on the profiling sheet 3 adsorbed by the vacuum boss 10 adsorb the surface. The glue rolling component 6 moves over the leather material on the profiling sheet 3. The leather material on the profiling sheet 3 will be rolled with glue, and the profiling groove 8 will not be rolled with glue, saving glue consumed during production, generally saving about 30%, and solving the risk of the leather material with glue after rolling with glue bringing glue to the non-rolled glue surface during sewing. After the cam 18 is in the process of being cut out, the cam 18 of the present invention is finished, and the cam 18 of the present invention is finished, and the cam 18 of the present invention is finished, and the cam 18 of the present invention is finished, and the cam 18 of the present invention is finished, and the cam 18 of the present invention is finished, and the cam 18 of the present invention is finished, and the cam 18 of the present invention is finished, and the cam 18 of the present invention is finished, and the cam 18 of the present invention is finished, and the cam 18 of the present invention is finished, and the cam 18 of the present invention is finished, and the cam 18 of the present invention is finished, and the cam 18 of the present invention is finished, and the cam 18 of the present invention is finished, and the cam 18 of the present invention is finished, and the cam 18 of the present invention is finished, and the cam 18 of the present invention is finished, and the cam 18 of the present invention is finished, and the cam 18 of the present invention is finished, and the cam 18 of the present invention is finished, and the cam

[0052] The driving mechanism includes a lifting cylinder 13 fixed in the inner cavity of the inner groove 9 , and the vacuum boss 10 driven by the lifting cylinder 13 moves up and down to dock with the contour piece 3 .

[0053] The four external limiting plates 15 form a hollow rectangular frame that is sleeved outside the rectangular groove 18 . The extrusion frame 4 is extruded through the hollow rectangular frame so that it is attached to the surface of the vacuum boss 10 for effective positioning.

[0054] The rubber rolling assembly 6 is arranged above the vacuum boss 10 and the contour sheet 3 , and the rubber rolling assembly 6 moves to roll the leather material adsorbed above the contour sheet 3 .

[0055] The inner cavity of the vacuum boss 10 is separated by a partition plate 11 to form nine vacuum chambers 14, and each vacuum chamber 14 is connected to the external vacuum through a vacuum pipe 12. The multiple vacuum chambers 14 separated by the partition plate 11 are set to adjust the adsorption force of the leather material, thereby achieving adjustable adsorption force.

[0056] The workbench 1 is provided with a through-type blanking chute 19 below the laser cutting assembly 7 . After the contoured sheet 3 is cut into the contoured groove 8 as needed, the fertilizer cut by the laser cutting assembly 7 falls from the blanking chute 19 .

[0057] The surface of the profiling sheet 3 is provided with profiling grooves 8 or a complete plane, and the profiling grooves 8 on the surface of the profiling sheet 3 with profiling grooves 8 have different structures. The profiling grooves 8 that have been opened can be used to perform rubber rolling processing on the adapted leather material. When the leather material with a new shape needs to be processed, the profiling sheet 3 with a complete plane is cut on site by the laser cutting component 7 to meet the processing needs, which is convenient and quick.

[0058] The specific workflow is as follows:

[0059] 1. Leather adsorption and positioning stage

[0060] The operator spreads the leather material on the surface of the current profiling sheet 3, and the vacuum boss 10 evacuates the nine independent vacuum chambers 14 through the vacuum pipe 12, and the leather material is adsorbed and adheres to the surface of the profiling sheet 3;

[0061] The partition plate 11 transmits the adsorption force in different areas. According to the thickness difference of the leather material, such as thick at the edge and thin in the center, the negative pressure value of each vacuum cavity 14 is adjusted, for example, the edge cavity is pressurized to 0.25MPa and the center cavity is depressurized to 0.1MPa to ensure overall smooth adsorption.

[0062] 2. Rolling glue coating stage

[0063] The rubber roller assembly 6 moves along the top of the profiling sheet 3, and the rubber roller only contacts the leather area that is not recessed by the profiling groove 8;

[0064] The leather material at the profiling groove 8 sinks 1-3 mm due to vacuum adsorption, forming a safe gap of 0.5-1 mm with the rubber roller, completely blocking the contact of glue.

[0065] 3. Contour sheet switching stage

[0066] Release the old profiling sheet: the cylinder drives the external limit plate 15 to retract, releasing the clamping of the extrusion frame 4; the lifting cylinder 13 lowers the vacuum boss 10, and the profiling sheet 3 is separated from the rectangular groove 18;

[0067] Loading new profiling sheet: Driving roller 2 drives connecting piece 5, moving the preset complete flat profiling sheet 3 to the bottom of laser cutting assembly 7; the laser cutting head cuts the profiling groove 8 adapted to the new leather material according to the preset path, and the waste material is discharged through the blanking chute 19;

[0068] Positioning and locking: The lifting cylinder 13 lifts the vacuum boss 10, and the extrusion frame 4 is embedded in the rectangular groove 18; the cylinder of the external limit plate 15 pushes the extrusion plate 16 to clamp the frame, completing millimeter-level precise positioning.

[0069] 4. Adaptive Adjustment Verification

[0070] The system detects the adsorption force of each vacuum chamber 14 through a pressure sensor. If the adsorption force deviation in a certain area exceeds a set threshold, such as ±5%, the valve opening of the corresponding vacuum pipe 12 is automatically adjusted to achieve dynamic balance.

[0071] Compared with the prior art, the present invention has the following beneficial effects:

[0072] Precise glue saving:

[0073] The laser cutting assembly 7 is used to cut the contour groove 8 on the surface of the contour sheet 3 on site, ensuring that the groove shape is completely matched with the leather contour. The glue coating boundary accuracy is improved to ±0.2mm, and the glue consumption is reduced by 30% to 35%;

[0074] The leather material at the contoured groove 8 is vacuum-absorbed and concave, and the glue rolling assembly 6 only contacts the raised area, completely preventing glue from penetrating into the non-glue-coated area.

[0075] Dynamically adapt to a variety of leather materials:

[0076] The profile sheet 3 adopts a modular design and can be quickly replaced by the drive roller 2. Combined with the on-site processing capabilities of the laser cutting component 7, the preparation and installation of the new leather profile groove 8 can be completed within 10 minutes, increasing the adaptation efficiency by 80%;

[0077] Multiple vacuum chambers 14 are independently controlled, and the adsorption force is dynamically adjusted within a range of 0.05-0.3 MPa according to the thickness difference of the leather area, such as the leather seams, to avoid deformation or displacement.

[0078] Stable positioning and fast switching:

[0079] The interlocking structure of the extruded frame 4 and the rectangular groove 18, in conjunction with the pneumatic extrusion of the external limiting plate 15, achieves millimeter-level precise positioning of the profiling piece 3 and the vacuum boss 10 with a repeatable positioning accuracy of ±0.1mm;

[0080] The lifting cylinder 13 drives the automatic docking of the vacuum boss 10 and the contoured sheet 3. The switching process does not require manual intervention, and the equipment utilization rate is increased to 95%.

[0081] Efficient waste removal:

[0082] The blanking chute 19 directly collects the waste generated by laser cutting, preventing the accumulation of debris from affecting the sealing between the contoured sheet 3 and the vacuum boss 10, and extending the maintenance period to more than 500 hours.

[0083] The above description is merely a preferred embodiment of the present invention and does not constitute any form of limitation to the present invention. Although the present invention has been disclosed as a preferred embodiment as above, it is not intended to limit the present invention. Any person skilled in the art can make some changes or modifications to equivalent embodiments using the technical contents disclosed above without departing from the scope of the technical solution of the present invention. However, any brief modifications, equivalent changes and modifications made to the above embodiments based on the technical essence of the present invention without departing from the content of the technical solution of the present invention are still within the scope of the technical solution of the present invention.

Claims

1. A zoned dynamic pressure regulating vacuum gluing device, comprising a workbench (1), a vacuum adsorption mechanism arranged in an inner cavity of the workbench (1), a profiling mechanism for forming a profiling cavity above the vacuum adsorption mechanism, and a gluing assembly (6) for gluing leather, characterized in that: The vacuum adsorption mechanism comprises a vacuum boss (10) which is driven by a driving mechanism to slide in an inner groove (9) provided on the surface of the workbench (1), and an opening is provided above the vacuum boss (10); The profiling mechanism comprises two driving rollers (2) rotatably arranged on both sides of a workbench (1) and a laser cutting assembly (7) arranged above the workbench (1); the surfaces of the two driving rollers (2) are connected to the profiling assembly in a transmission manner; the profiling assembly comprises at least three profiling sheets (3) connected by connecting sheets (5); the surfaces of the profiling sheets (3) are cut with profiling grooves (8) by the laser cutting assembly (7); the four sides of the profiling sheet (3) are fixedly connected to downwardly protruding extrusion frames (4); the profiling sheet (3) is located above an opening of a vacuum boss (10); and the surface of the profiling sheet (3) is provided with vacuum holes (17); The side of the vacuum boss (10) is provided with a rectangular groove (18) adapted to the extrusion frame (4), the four sides of the vacuum boss (10) are all slidably connected to the external limit plate (15) driven by the cylinder, the side of the external limit plate (15) is fixedly connected to the extrusion plate (16) abutting the extrusion frame (4), the rubber rolling assembly (6) is arranged above the vacuum boss (10) and the profiling sheet (3), and the surface of the profiling sheet (3) is provided with a profiling groove (8) or a complete The planar surface is provided with a profiling groove (8). The profiling groove (8) on the surface of the profiling sheet (3) has different structures. The driving mechanism includes a lifting cylinder (13) fixed in the inner cavity of the inner groove (9). The vacuum boss (10) driven by the lifting cylinder (13) moves up and down and docks with the profiling sheet (3). The inner cavity of the vacuum boss (10) is separated by a partition plate (11) to form nine vacuum chambers (14), and each vacuum chamber (14) is connected to the outside vacuum through a vacuum pipe (12).

2. The zoned dynamic pressure regulating vacuum gluing device according to claim 1, characterized in that: Four external limiting plates (15) form a hollow rectangular frame that is sleeved outside the rectangular groove (18).

3. The zoned dynamic pressure regulating vacuum gluing device according to claim 1, characterized in that: The workbench (1) is located below the laser cutting assembly (7) and is provided with a through-type blanking trough (19).

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