Partitioned dynamic pressure regulation vacuum gluing device

Abstract

The invention relates to the technical field of gluing, in particular to a partitioned dynamic pressure adjusting vacuum gluing device which comprises a workbench, a vacuum adsorption mechanism arranged in an inner cavity of the workbench, a profiling mechanism used for forming a profiling cavity above the vacuum adsorption mechanism and a glue rolling assembly used for conducting glue rolling on leather. According to the partitioned dynamic pressure adjusting vacuum gluing device, an operator flatly spreads leather on the surface of a current profiling piece, the vacuum bosses vacuumize the nine independent vacuum cavities through the vacuum pipelines, and the leather is adsorbed and attached to the surface of the profiling piece; the partition plate transmits adsorption force in a partitioned mode, according to the thickness difference of leather, the negative pressure value of each vacuum cavity is adjusted, it is ensured that overall adsorption is smooth, in the glue rolling and coating stage, a glue rolling assembly moves along the upper portion of a profiling piece, and a glue roller is only in contact with the leather area which is not sunken by a profiling groove; and the leather at the profiling groove sinks by 1-3mm due to vacuum adsorption, and forms a safety gap with the rubber roller, so that the contact of the glue is thoroughly blocked.

Description

Technical Field

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

[0002] In the manufacturing process of leather products (such as shoe uppers, bags, furniture, etc.), the gluing process is a key processing link, which directly affects the product's fit strength and appearance quality. Traditional vacuum gluing equipment usually uses a fixed profiling mold. After vacuum adsorbing the leather, glue is applied to the non-profiling area using a glue rolling component. However, the existing technology has the following significant defects: Poor mold adaptability: Fixed profiling molds can only adapt to leather of a single shape. When changing products, the mold needs to be disassembled as a whole, which is time-consuming and labor-intensive, resulting in low production efficiency. Serious waste of glue: The boundary accuracy between the profiling area and the non-profiling area is insufficient. The glue often penetrates into the non-glue-coated area due to the loose fit of the mold edge, resulting in glue waste (usually the waste rate is as high as 25% to 40%). Uneven adsorption force: The traditional vacuum adsorption chamber is a single chamber structure, which cannot dynamically adjust the local adsorption force according to the thickness or material difference of the leather, which can easily lead to deformation of thin leather or weak adsorption of thick leather; High mold storage cost: 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

[0003] In view of the deficiencies in the prior art, the present invention provides a zoned dynamic pressure regulating vacuum gluing device to solve the above-mentioned problems.

[0004] To achieve the above objectives, the present invention is implemented through the following technical solutions: a zoned dynamic pressure regulating vacuum gluing device, comprising a workbench, a vacuum adsorption mechanism arranged in the inner cavity of the workbench, a profiling mechanism for forming a profiling cavity above the vacuum adsorption mechanism, and a glue rolling assembly for rolling glue on leather, wherein the vacuum adsorption mechanism comprises a vacuum boss slidably arranged in an inner groove opened on the surface of the workbench by a driving mechanism, and an opening is arranged above the vacuum boss; The profiling mechanism comprises 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 by transmission, the profiling assembly comprises 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; A rectangular groove adapted to the extrusion frame is provided on the side of the vacuum boss. Four sides of the vacuum boss are all slidably connected with external limit plates driven by cylinders. A pressing plate abutted against the extrusion frame is fixedly connected to the side of the external limit plate. When in use, the leather material is placed above the profiling sheet adsorbed by the vacuum boss, and then suction is applied through the vacuum chamber for adsorption. The leather material is adsorbed, and then the leather material above the profiling groove is sunken. At this time, the glue application assembly moves to apply glue to the surface of the leather material. The surface at the profiling groove is not coated with glue. The leather material that needs to be glued is laid flat on the vacuum boss. The vacuum holes densely distributed on the profiling sheet adsorbed by the vacuum boss adsorb the epidermis. The glue application assembly moves over the leather material on the profiling sheet, and the leather material on the profiling sheet will be rolled with glue, and the profiling groove will not be rolled with glue, saving about 30% of the glue consumed during production, solving the risk that the glued leather material will bring the glue to the non-glued surface during sewing. And when a new leather material needs to be replaced, the profiling sheet is selected for replacement according to requirements. When it is a new leather material, the profiling sheet of the complete plane below is cut by the laser cutting assembly on site to form a new profiling groove. Then, the external limit plates around the vacuum boss are driven by the cylinders to open, losing the extrusion on the extrusion frame below the profiling sheet. Then, the driving mechanism drives the vacuum boss downward, losing the limit on the profiling sheet. Then, through the rotation of the driving rollers on both sides, the corresponding profiling sheet is moved above the vacuum boss. When it is directly above the vacuum boss, the driving cylinder drives the vacuum boss to rise. When the extrusion frame is docked with the rectangular groove, the external limit plate is driven to move to extrude the extrusion frame, so that it is fixed on the rectangular groove, limiting the profiling sheet on the vacuum boss, and then reprocessing can be carried out. New profiling sheets can be cut and replaced on site according to requirements, and it can be applied to a variety of leather materials for glue rolling processing, effectively improving the processing efficiency.

[0005] As a further scheme of the present invention: The driving mechanism includes a lifting cylinder fixed in the inner cavity of the inner groove, and the vacuum boss is driven by the lifting cylinder to move up and down to dock with the profiling sheet.

[0006] As a further scheme of the present invention: The four external limit plates form a hollow rectangular frame sleeved outside the rectangular groove, and the extrusion frame is extruded through the hollow rectangular frame to make it adhere to the surface of the vacuum boss for effective positioning.

[0007] As a further scheme of the present invention: The glue application assembly is arranged above the vacuum boss and the profiling sheet, and the leather material adsorbed above the profiling sheet is rolled with glue by the movement of the glue application assembly.

[0008] As a further scheme of the present invention: The inner cavity of the vacuum boss is partitioned by a partition plate into nine vacuum chambers, and each vacuum chamber is respectively communicated with the external vacuum through a vacuum pipeline. The arrangement of multiple vacuum chambers separated by the partition plate adjusts the adsorption force on the leather material to achieve adjustable adsorption force.

[0009] As a further solution of the present invention: the workbench is provided with a through-type blanking trough below the laser cutting assembly. After the contoured sheet is cut into a contoured groove as required, the fertilizer cut by the laser cutting assembly falls from the blanking trough.

[0010] 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 roll glue on the matching leather material. When the leather material with a new shape needs to be processed, the complete plane profiling sheet can be cut on-site by a laser cutting component to meet the processing needs, which is convenient and quick.

[0011] 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 partitioned vacuum adsorption. The specific workflow is as follows: 1. Leather adsorption and positioning stage The operator spreads the leather material on the current profile sheet surface, and the vacuum boss evacuates nine independent vacuum chambers through the vacuum pipeline, and the leather material is adsorbed and adhered to the profile sheet surface; The partition board transfers the adsorption force to different areas, and according to the difference in leather thickness, the negative pressure value of each vacuum chamber is adjusted to ensure overall smooth adsorption.

[0012] 2. Glue coating stage The rubber rolling 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; 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 with glue.

[0013] 3. Contour sheet switching stage Release the old profiling sheet: 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 sheet is separated from the rectangular groove; Loading new profiling sheet: The driving roller drives the connecting sheet 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; Positioning and locking: The lifting cylinder lifts 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 to complete millimeter-level precise positioning.

[0014] 4. Adaptive Adjustment Verification The system detects the adsorption force of each vacuum chamber through a pressure sensor. 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.

[0015] The present invention has the following beneficial effects compared with the prior art: Precise glue saving: The laser cutting component cuts the profiling grooves on the surface of the profiling sheet on-site, ensuring that the groove shape perfectly matches the leather contour. The accuracy of the glue coating boundary is improved to ±0.2 mm, and the glue consumption is reduced by 30% - 35%. The leather at the profiling grooves is vacuum-adsorbed and concave, and the glue rolling component only contacts the convex area, completely avoiding the glue from seeping into the non-glue area.

[0016] Dynamically adapting to various leathers: The profiling sheet adopts a modular design. Through the quick replacement of the driving roller and combined with the on-site processing ability of the laser cutting component, the preparation and installation of the profiling grooves for the new leather can be completed within 10 minutes, and the adaptation efficiency is increased by 80%. Multiple vacuum chambers are independently controlled, and the adsorption force is dynamically adjusted according to the thickness difference of the leather area to avoid deformation or displacement.

[0017] Stable positioning and quick switching: The fitting structure of the extrusion frame and the rectangular groove, combined with the pneumatic extrusion of the external limit plate, realizes the millimeter-level precise positioning of the profiling sheet and the vacuum boss. The lifting cylinder drives the automatic docking of the vacuum boss and the profiling sheet, and the switching process does not require manual intervention. The equipment operation rate is increased to 95%.

[0018] Efficient waste cleaning: The blanking groove directly collects the waste generated by laser cutting, avoiding the accumulation of debris from affecting the sealing performance between the profiling sheet and the vacuum boss. The maintenance period is extended to more than 500 hours. Description of the drawings

[0019] Figure 1 is a schematic structural diagram of the present invention; Figure 2 is a top view of the structure of the present invention; Figure 3 is the present invention Figure 1 The partial enlarged view at A in; Figure 4 is a top view of the structure of the vacuum boss of the present invention; Figure 5 is the present invention Figure 4 The partial enlarged view at B in.

[0020] In the figure: 1. workbench; 2. driving roller; 3. profiling sheet; 4. extrusion frame; 5. connecting sheet; 6. rubber rolling 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

[0021] In order to further explain the technical means and effects adopted by the present invention to achieve the predetermined invention purpose, the specific implementation mode, structure, characteristics and effects of the present invention are described in detail below in combination with the accompanying drawings and preferred embodiments.

[0022] See also Figures 1-5 The present invention provides a technical solution: a zoned dynamic pressure regulating vacuum gluing device, comprising a workbench 1, a vacuum adsorption mechanism arranged in the inner cavity of the workbench 1, a profiling mechanism for forming a profiling cavity above the vacuum adsorption mechanism, and a glue rolling assembly 6 for rolling glue on leather, wherein the vacuum adsorption mechanism comprises a vacuum boss 10 driven by a driving mechanism to slide in an inner groove 9 opened on the surface of the workbench 1, and an opening is arranged above the vacuum boss 10; 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 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 sheets 3 are fixedly connected with extrusion frames 4 protruding downward. The profiling sheets 3 are located above the opening of the vacuum boss 10. The surface of the profiling sheets 3 is provided with vacuum holes 17. A rectangular groove 18 adapted to the extrusion frame 4 is provided on the side of the vacuum boss 10. Four sides of the vacuum boss 10 are all slidably connected with external limit plates 15 driven by cylinders. A pressing plate 16 abutted against the extrusion frame 4 is fixedly connected to the side of the external limit plate 15. When in use, the leather material is placed above the profiling sheet 3 adsorbed by the vacuum boss 10, and then suction is applied through the vacuum chamber 14 for adsorption. The leather material is adsorbed, and then the leather material above the profiling groove 8 is recessed. At this time, the glue application assembly 6 moves to apply glue to the surface of the leather material. The surface at the profiling groove 8 is not coated with glue. The leather material that needs to be glued is laid flat on the vacuum boss 10. The vacuum holes 17 densely distributed on the profiling sheet 3 adsorbed by the vacuum boss 10 adsorb the epidermis. The glue application assembly 6 moves over the leather material on the profiling sheet 3, and the leather material on the profiling sheet 3 will be coated with glue, while the profiling groove 8 will not be coated with glue, saving about 30% of the glue consumed during production, solving the risk that the glued leather material will bring the glue to the non-glued surface during sewing. And when a new leather material needs to be replaced, the profiling sheet 3 is selected for replacement according to the requirements. When it is a new leather material, the profiling sheet 3 on the lower complete plane is cut by the laser cutting assembly 7 on site to form a new profiling groove 8. Then, the external limit plates 15 around the vacuum boss 10 are driven by the cylinders to open, losing the extrusion on the extrusion frame 4 below the profiling sheet 3. Then the driving mechanism drives the vacuum boss 10 downward, losing the limit on the profiling sheet 3. Then, by the rotation of the two driving rollers 2 on both sides, the corresponding profiling sheet 3 is moved above the vacuum boss 10. When it is directly above the vacuum boss 10, at this time, the driving cylinder drives the vacuum boss 10 to rise. When the extrusion frame 4 is docked with the rectangular groove 18, the external limit plate 15 is driven to move to squeeze the extrusion frame 4, so that it is fixed on the rectangular groove 18, and the profiling sheet 3 is limited on the vacuum boss 10, and then processing is carried out again. A new profiling sheet 3 can be cut and replaced on site according to the requirements, and it can be applied to a variety of leather materials for glue application processing, effectively improving the processing efficiency.

[0023] The driving mechanism includes a lifting cylinder 13 fixed in the inner cavity of the inner groove 9. The vacuum boss 10 is driven by the lifting cylinder 13 to move up and down to dock with the profiling sheet 3.

[0024] The four external limit plates 15 form a hollow rectangular frame sleeved outside the rectangular groove 18. The extrusion frame 4 is squeezed through the hollow rectangular frame so that it is effectively positioned by adhering to the surface of the vacuum boss 10.

[0025] The glue application assembly 6 is arranged above the vacuum boss 10 and the profiling sheet 3. The glue application assembly 6 moves to apply glue to the leather material adsorbed above the profiling sheet 3.

[0026] The inner cavity of the vacuum boss 10 is partitioned by a partition plate 11 into nine vacuum chambers 14, and each vacuum chamber 14 is respectively connected to the external vacuum through a vacuum pipeline 12. The multiple vacuum chambers 14 separated by the partition plate 11 are arranged to adjust the adsorption force on the leather material, realizing adjustable adsorption force.

[0027] A through-type blanking groove 19 is opened below the workbench 1 and under the laser cutting assembly 7. After the profiling groove 8 is cut out on the profiling piece 3 as required, the waste material cut by the laser cutting assembly 7 falls from the blanking groove 19.

[0028] The surface of the profiling piece 3 is provided with a profiling groove 8 or a complete plane, and the profiling groove 8 structures on the surface of the profiling piece 3 with the profiling groove 8 are all different. The profiling groove 8 that has been opened is used for rolling glue processing on the adapted leather material. When it is necessary to process leather materials with new shapes, on-site, the laser cutting assembly 7 cuts the profiling piece 3 with a complete plane to meet the processing requirements, which is convenient and fast.

[0029] The specific working process is as follows: 1. Leather material adsorption and positioning stage The operator lays the leather material flat on the surface of the current profiling piece 3. The vacuum boss 10 evacuates the nine independent vacuum chambers 14 through the vacuum pipeline 12, and the leather material is adsorbed and attached to the surface of the profiling piece 3; The partition plate 11 transfers the adsorption force in zones. According to the difference in leather material thickness, such as thick at the edge and thin in the center, by adjusting the negative pressure values of each vacuum chamber 14, for example, pressurizing the edge cavity to 0.25 MPa and reducing the pressure in the central cavity to 0.1 MPa, ensure the overall flat adsorption.

[0030] 2. Glue rolling and coating stage The glue rolling assembly 6 moves above the profiling piece 3, and the glue roller only contacts the area of the leather material that is not sunken by the profiling groove 8; The leather material at the profiling groove 8 sinks 1 - 3 mm due to vacuum adsorption, forming a safety gap of 0.5 - 1 mm with the glue roller, completely blocking the contact with the glue.

[0031] 3. Profiling piece switching stage Release the old profiling piece: 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 piece 3 disengages from the rectangular groove 18; Load the new profiling piece: The driving roller 2 drives the connecting piece 5, and moves the preset profiling piece 3 with a complete plane below the laser cutting assembly 7; The laser cutting head cuts out the profiling groove 8 adapted to the new leather material according to the preset path, and the waste material is discharged through the blanking groove 19; Positioning and locking: The lifting cylinder 13 raises the vacuum boss 10, and the extrusion frame 4 is inserted into 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.

[0032] 4. Adaptive adjustment verification 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 the set threshold, such as ±5%, the valve opening of the corresponding vacuum pipeline 12 is automatically adjusted to achieve dynamic balance.

[0033] The present invention has the following beneficial effects compared with the prior art: Precise glue saving: The laser cutting assembly 7 cuts the profiling grooves 8 on the surface of the profiling sheet 3 on-site, ensuring that the groove shape completely matches the leather contour. The accuracy of the glue coating boundary is improved to ±0.2 mm, and the glue consumption is reduced by 30% - 35%; The leather at the profiling grooves 8 is vacuum-adsorbed and sunken, and the glue rolling assembly 6 only contacts the raised areas, completely avoiding the infiltration of glue into the non-glue coating area.

[0034] Dynamic adaptation to multiple leathers: The profiling sheet 3 adopts a modular design and can be quickly replaced through the driving roller 2. Combining with the on-site processing ability of the laser cutting assembly 7, the preparation and installation of the profiling grooves 8 for the new leather can be completed within 10 minutes, and the adaptation efficiency is increased by 80%; Multiple vacuum chambers 14 are independently controlled, and the adsorption force adjustment range of 0.05 - 0.3 MPa is dynamically adjusted according to the thickness difference of the leather area, such as at the leather seam, to avoid deformation or displacement.

[0035] Stable positioning and quick switching: The fitting structure of the extrusion frame 4 and the rectangular groove 18, combined with the pneumatic extrusion of the external limit plate 15, realizes the millimeter-level precise positioning and repeated positioning accuracy of ±0.1 mm between the profiling sheet 3 and the vacuum boss 10; The lifting cylinder 13 drives the automatic docking of the vacuum boss 10 and the profiling sheet 3, and the switching process does not require manual intervention, and the equipment operation rate is increased to 95%.

[0036] Efficient waste cleaning: The blanking chute 19 directly collects the waste generated by laser cutting, avoiding the accumulation of debris affecting the sealing performance between the profiling sheet 3 and the vacuum boss 10, and the maintenance period is extended to more than 500 hours.

[0037] The above are only the preferred embodiments of the present invention, and do not impose any form of limitation on the present invention. Although the present invention has been disclosed above with the preferred embodiments, it is not intended to limit the present invention. Any person skilled in the art can make some changes or modifications to equivalent embodiments by using the above-disclosed technical content without departing from the technical solution of the present invention. However, as long as it does not depart from the technical solution content of the present invention, any brief modifications, equivalent changes and modifications made to the above embodiments according to the technical essence of the present invention still fall 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 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, 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 drivingly connected to the profiling assembly; the profiling assembly comprises at least three profiling sheets (3) connected via connecting sheets (5); the surfaces of the profiling sheets (3) are cut with profiling grooves (8) by the laser cutting assembly (7); the profiling sheets (3) are fixedly connected with downwardly protruding extrusion frames (4) around their peripheries; the profiling sheets (3) are located above an opening of a vacuum boss (10); and the surface of the profiling sheets (3) is provided with vacuum holes (17); A rectangular groove (18) adapted to the extrusion frame (4) is provided on the side of the vacuum boss (10); the four sides of the vacuum boss (10) are slidably connected to an external limit plate (15) driven by a cylinder; and the side of the external limit plate (15) is fixedly connected to an extrusion plate (16) abutting against the extrusion frame (4).

2. The zoned dynamic pressure regulating vacuum gluing device according to claim 1 is characterized in that: The driving mechanism comprises 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 sheet (3).

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

4. The zoned dynamic pressure regulating vacuum gluing device according to claim 1 is characterized in that: The rubber rolling assembly (6) is arranged above the vacuum boss (10) and the contoured sheet (3).

5. The zoned dynamic pressure regulating vacuum gluing device according to claim 1 is characterized in that: The inner cavity of the vacuum boss (10) is divided into nine vacuum cavities (14) by a partition plate (11), and each vacuum cavity (14) is in vacuum communication with the outside world via a vacuum pipe (12).

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

7. The zoned dynamic pressure regulating vacuum gluing device according to claim 1 is characterized in that: The surface of the profiling sheet (3) is provided with profiling grooves (8) or is a complete plane, and the profiling grooves (8) on the surface of the profiling sheet (3) are provided with different structures.

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