Combined type laminating device for leather processing

Abstract

The utility model discloses a combined type laminating device for leather processing, which relates to the technical field of leather processing equipment and comprises a workbench, a fixed seat is welded and mounted in the middle of the upper end face of the workbench, a mounting frame is mounted in the fixed seat, a movable compression roller is rotatably mounted in the mounting frame, and the movable compression roller is rotatably mounted in the workbench. A groove is formed in the position, corresponding to the lower portion of the movable pressing roller, of the workbench, a fixed pressing roller is rotationally installed in the groove, a hydraulic lifting device is fixedly installed at the top end of the fixed base, a pressing table which is in sliding limiting with the workbench is arranged at the rear end of the fixed base, and electric push rods are installed on the two sides of the pressing table. A mounting base is arranged above the pressing table, an ultrasonic pressing assembly is arranged in the mounting base, and the problems that after different leather materials are compounded through the laminating device, permeation and diffusion of an adhesive and leather fibers are insufficient, and air is prone to being left on an interface to form bubbles and hollowing are solved.

Description

Technical Field

[0001] This utility model relates to the technical field of leather processing equipment, specifically a bonding device for composite leather processing. Background Technology

[0002] Leather bonding equipment is a specialized device that uses rollers, pressure plates, and other components to apply pressure, along with heating or gluing functions, to precisely bond two or more layers of leather materials (or leather with fabric, film, or other materials). It can perform dry, wet, or hot-melt bonding processes and features high automation, smooth and firm bonding, and high production efficiency. It is widely used in the processing of leather products such as footwear, bags, clothing, and automotive interiors.

[0003] For example, the Chinese authorized patent CN218115475U, entitled "A Processing Composite Device for Leather," includes a conveyor base. The top of the conveyor base is provided with a housing. Two first telescopic rods are fixedly connected to the top of the housing assembly, and a suction plate is fixedly installed at the bottom of each first telescopic rod. Two brackets are fixedly installed at the bottom of each suction plate, and a brush roller is movably connected between the brackets via bearings. A servo motor is fixedly installed at one end of each brush roller. In this improved processing composite device for leather, the leather is conveyed on the surface of a conveyor belt through the cooperation of the motor and the roller shaft. The brush roller cleans the leather surface, and the fan and suction plate work together to absorb the cleaned dust into the dust collection box through a connecting pipe. The second telescopic rod and the push plate work together to squeeze the glue in the glue injector, and the squeezed glue flows out from the glue injection head through the glue injection pipe.

[0004] While the aforementioned existing technologies can achieve composite bonding of different types of leather, they suffer from insufficient bonding tightness, air bubbles and hollows easily remaining at the interface, leading to unstable bonding quality. Traditional rigid pressure plates are difficult to adapt to the undulations of the leather surface, easily causing uneven pressure and resulting in edge warping and central loosening. For composite processes with adhesive coating, the penetration and diffusion of the adhesive into the leather fibers are insufficient, resulting in poor curing effect and low peel strength. Furthermore, the equipment has limited adaptability to leathers of different thicknesses and hardnesses, failing to meet diverse production needs. Therefore, these technologies do not meet current requirements. To address these issues, we propose a composite leather processing bonding device. Utility Model Content

[0005] The purpose of this invention is to provide a bonding device for composite leather processing, in order to solve the problems mentioned in the background art, such as insufficient penetration and diffusion of adhesive and leather fibers, poor curing effect, low peel strength, and air bubbles and hollows easily forming at the interface after bonding different leather materials.

[0006] To achieve the above objectives, this utility model provides the following technical solution: a bonding device for composite leather processing, comprising a worktable, a fixed seat welded and installed at the middle position of the upper surface of the worktable, an mounting frame installed inside the fixed seat, a movable pressure roller rotatably installed inside the mounting frame, a groove provided on the worktable corresponding to the lower position of the movable pressure roller, a fixed pressure roller rotatably installed inside the groove, a hydraulic lifting device fixedly installed at the top of the fixed seat, and the movable end of the hydraulic lifting device fixed to the mounting frame, a pressing platform provided at the rear end of the fixed seat that slides and limits with the worktable, electric push rods installed on both sides of the pressing platform, and the fixed ends of the electric push rods fixed to the worktable, a mounting seat provided above the pressing platform, and the two sides of the bottom of the mounting seat fixed to the movable ends of the electric push rods, and an ultrasonic pressing assembly provided inside the mounting seat, the ultrasonic pressing assembly consisting of an ultrasonic generator, a transducer, an amplitude transformer, and an ultrasonic pressure plate.

[0007] Preferably, the ultrasonic generator is built into the base of the workbench, the transducers are arranged in a rectangular array on the top of the mounting base, the ultrasonic pressure plate is installed at the bottom of the mounting base, and the upper and lower ends of the amplitude transformer are connected to the transducers and the ultrasonic pressure plate, respectively.

[0008] Preferably, the rear end of the workbench is provided with a mounting slot, and multiple pressure sensors are arranged in a rectangular array inside the mounting slot. The signal output terminal of the pressure sensor is connected to a microcontroller, and the output terminal of the microcontroller is connected to an electric push rod. A detection plate is installed on the upper end of the pressure sensor.

[0009] Preferably, the detection plate is slidably limited to the worktable, and a damping and shock absorption mechanism is installed between the detection plate and the pressing table. The damping and shock absorption mechanism consists of a damper and a shock absorption spring.

[0010] Preferably, a first leather material feeding roller is installed at the front end of the workbench, and a feeding frame is welded and fixed to the front side of the upper surface of the workbench. A second leather material feeding roller distributed vertically is installed inside the feeding frame. Both the first and second leather material feeding rollers are equipped with heating rods. The two ends of the heating rods are fixed to the workbench and the feeding frame, respectively, and the outer walls of the heating rods are connected to the first and second leather material feeding rollers through bearings.

[0011] Preferably, the rear end of the workbench is equipped with a discharge roller via a rotating shaft.

[0012] Preferably, the inner side of each fixed seat longitudinal frame is provided with a limiting groove, and the outer side of each mounting frame longitudinal frame is fixed with a guide block, and the guide block slides and limits the limiting groove.

[0013] Compared with the prior art, the beneficial effects of this utility model are:

[0014] 1. This utility model incorporates an ultrasonic pressing assembly. After the leather, pressed and bonded by movable and fixed pressure rollers, enters the pressing table, an electric push rod is activated, bringing the ultrasonic pressing plate into contact with the leather. Subsequently, the ultrasonic generator built into the worktable base is activated, generating a high-frequency electrical signal. This signal is converted into mechanical energy by a transducer, producing high-frequency vibration. The amplitude is then amplified by an amplitude transformer and transmitted to the ultrasonic pressing plate, causing the pressing plate to apply high-frequency vibration to the leather surface. On one hand, ultrasonic vibration effectively eliminates air and tiny impurities between the leather bonding interfaces, reducing bubbles and voids, increasing the contact area between the two layers of leather, and improving the bonding tightness. On the other hand, high-frequency vibration promotes localized movement of the leather material molecular chains, accelerating the penetration and diffusion of adhesive molecules into the leather fibers, accelerating the curing reaction, and forming stronger chemical bonds or physical entanglement.

[0015] 2. This utility model features a detection plate positioned below the pressing table. On one hand, a damping and shock-absorbing mechanism is installed between the detection plate and the pressing table. This mechanism consists of a damper and a shock-absorbing spring. The damper utilizes the principle of fluid damping to dissipate vibration energy when the pressing table is subjected to ultrasonic vibration and the impact force generated by leather bonding. The shock-absorbing spring absorbs and buffers pressure through its elastic deformation, providing support and cushioning for the pressing table. The two mechanisms work together to effectively reduce the vibration and impact force transmitted from the pressing table to the detection plate. On the other hand, a pressure sensor is installed between the detection plate and the inner groove of the worktable to detect the contact pressure of the ultrasonic pressing plate on the leather before ultrasonic pressing, allowing for adjustment of the electric push rod pressure according to the leather material and processing requirements.

[0016] 3. This invention incorporates heating rods installed inside both the first and second leather material feeding rollers. During the leather lamination process, these rollers respectively transport the two layers of leather to be bonded. Upon startup, the internal heating rods activate, converting electrical energy into heat energy, which is then transferred to the rollers via thermal conduction. As the rollers rotate, they maintain continuous contact with the leather, evenly distributing heat to the leather surface. This gradual increase in leather temperature allows the preheated leather to melt and activate the adhesive more quickly, reducing its viscosity, enhancing its fluidity and wetting ability against leather fibers, promoting penetration and diffusion between the adhesive and leather fibers, and accelerating the curing reaction. This significantly improves the bonding strength between the leather layers. Attached Figure Description

[0017] Figure 1 This is a perspective view of the present utility model;

[0018] Figure 2 This is a side view of the internal structure of this utility model;

[0019] Figure 3 This is a schematic diagram of the ultrasonic pressing assembly structure of this utility model;

[0020] Figure 4 This is a perspective view of the connection structure between the fixed base and the mounting bracket of this utility model.

[0021] In the diagram: 1. Workbench; 2. First leather material feeding roller; 3. Feeding frame; 4. Second leather material feeding roller; 5. Fixed base; 6. Hydraulic lifting device; 7. Mounting frame; 8. Movable pressure roller; 9. Fixed pressure roller; 10. Pressing table; 11. Mounting base; 12. Electric push rod; 13. Transducer; 14. Discharge roller; 15. Heating rod; 16. Ultrasonic pressure plate; 17. Amplitude rod; 18. Mounting groove; 19. Detection plate; 20. Pressure sensor; 21. Damping and vibration reduction mechanism; 22. Limiting groove; 23. Guide block. Detailed Implementation

[0022] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments of the present utility model. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments.

[0023] Please see Figure 1 and Figure 2 An embodiment of this utility model provides a bonding device for composite leather processing, including a workbench 1. A fixed seat 5 is welded and installed at the middle position of the upper surface of the workbench 1. An installation frame 7 is installed inside the fixed seat 5. A movable pressure roller 8 is rotatably installed inside the installation frame 7. A groove is provided on the workbench 1 below the movable pressure roller 8. A fixed pressure roller 9 is rotatably installed inside the groove. A hydraulic lifting device 6 is fixedly installed at the top of the fixed seat 5, and the movable end of the hydraulic lifting device 6 is fixed to the installation frame 7.

[0024] When the hydraulic lifting device 6 is working, its internal hydraulic system pushes the movable end to move up and down, driving the mounting frame 7 to rise and fall along the guide structure inside the fixed seat 5, thereby causing the movable pressure roller 8 to move closer to or further away from the fixed pressure roller 9. When the two layers of leather pass between the movable pressure roller 8 and the fixed pressure roller 9 respectively, by adjusting the pressure of the hydraulic lifting device 6, the movable pressure roller 8 and the fixed pressure roller 9 can apply appropriate squeezing force to the leather, initially squeezing and bonding the two layers of leather together. The hydraulic lifting device 6 can flexibly adjust the distance and pressure between the movable pressure roller 8 and the fixed pressure roller 9, which can adapt to leather of different thicknesses and ensure that leather of different thicknesses can obtain appropriate initial squeezing and bonding force, thus improving the device's adaptability to the processing of diverse leather products.

[0025] Please see Figure 1 , Figure 2 and Figure 3The rear end of the fixed base 5 is provided with a pressing platform 10 that slides and limits with the worktable 1. Electric push rods 12 are installed on both sides of the pressing platform 10, and the fixed end of the electric push rod 12 is fixed to the worktable 1. A mounting base 11 is provided above the pressing platform 10, and the two sides of the bottom of the mounting base 11 are fixed to the movable end of the electric push rod 12. An ultrasonic pressing assembly is provided inside the mounting base 11. The ultrasonic pressing assembly consists of an ultrasonic generator, a transducer 13, an amplitude transformer 17, and an ultrasonic pressure plate 16. The ultrasonic generator is built into the base of the worktable 1. The transducer 13 is arranged in a rectangular array on the top of the mounting base 11. The ultrasonic pressure plate 16 is installed at the bottom of the mounting base 11, and the upper and lower ends of the amplitude transformer 17 are connected to the transducer 13 and the ultrasonic pressure plate 16, respectively.

[0026] After the electric push rod 12 is powered on, it pushes the mounting base 11 and the ultrasonic pressing assembly to move up and down. When the initially bonded leather is transported above the pressing table 10, the electric push rod 12 pushes the ultrasonic pressing plate 16 down to contact the leather. At this time, the ultrasonic generator generates a high-frequency electrical signal, which is converted into mechanical energy by the transducer 13, generating high-frequency vibration. The vibration is then amplified by the amplitude transformer 17 and transmitted to the ultrasonic pressing plate 16, causing the ultrasonic pressing plate 16 to apply high-frequency vibration to the leather surface, performing a secondary pressing on the leather. The high-frequency vibration effectively removes air and tiny impurities between the leather bonding interfaces, promotes the penetration and diffusion of adhesive and leather fibers, and significantly improves the bonding tightness, peel strength, and bending resistance of the leather.

[0027] Please see Figure 3 The rear end of the workbench 1 is provided with a mounting slot 18. Multiple pressure sensors 20 are arranged in a rectangular array inside the mounting slot 18. The signal output terminal of the pressure sensor 20 is connected to a microcontroller, and the output terminal of the microcontroller is connected to the electric push rod 12. A detection plate 19 is installed on the upper end of the pressure sensor 20 to detect the contact pressure of the ultrasonic pressure plate 16 on the leather before ultrasonic pressing, so as to adjust the pressure of the electric push rod 12 on the leather according to the leather material and processing requirements.

[0028] Please see Figure 3 The detection plate 19 is slidably limited to the worktable 1. A damping and shock absorption mechanism 21 is installed between the detection plate 19 and the pressing table 10. The damping and shock absorption mechanism 21 consists of a damper and a shock absorption spring. The damper uses the principle of fluid damping to consume vibration energy when the pressing table is subjected to ultrasonic vibration and the impact force generated by leather bonding. The shock absorption spring absorbs and buffers the pressure through its own elastic deformation, and plays a supporting and buffering role for the pressing table 10. The two work together to effectively reduce the vibration and impact force transmitted from the pressing table to the detection plate 19.

[0029] Please see Figure 2The front end of the workbench 1 is equipped with a first leather material feeding roller 2. A feeding frame 3 is welded and fixed to the front side of the upper end face of the workbench 1. The feeding frame 3 is equipped with a second leather material feeding roller 4 distributed vertically inside. The first leather material feeding roller 2 and the second leather material feeding roller 4 are both equipped with electric heating rods 15. The two ends of the electric heating rod 15 are fixed to the workbench 1 and the feeding frame 3 respectively. The outer wall of the electric heating rod 15 is connected to the first leather material feeding roller 2 and the second leather material feeding roller 4 respectively through bearings. The rear end of the workbench 1 is equipped with a discharge roller 14 through a rotating shaft.

[0030] When the heating rod 15 is energized, electrical energy is converted into heat energy, which raises the temperature of the first leather feeding roller 2 and the second leather feeding roller 4 through heat conduction. As the leather is conveyed while wrapped around the feeding rollers, the rollers maintain continuous contact with the leather, evenly transferring heat to the leather surface and gradually raising the leather temperature to a suitable preheating temperature. With the rotation of the feeding rollers, the preheated leather is conveyed to the movable pressure roller 8 and the fixed pressure roller 9 for initial bonding. This enhances the activity of the adhesive, strengthens its bond with the leather fibers, and improves adhesion strength. Simultaneously, preheating increases the plasticity of the leather, making it easier to deform during bonding, reducing wrinkles and breakage, and improving bonding quality and product forming effect.

[0031] Please see Figure 4 The inner side of the fixed base 5 longitudinal frame is provided with a limiting groove 22, and the outer side of the mounting frame 7 longitudinal frame is provided with a guide block 23. The guide block 23 slides and limits the limiting groove 22. The cooperation between the limiting groove 22 and the guide block 23 improves the stability and accuracy of the mounting frame 7 during the lifting process, avoids the movable pressure roller 8 from deviating or shaking during the lifting process, ensures that the bonding pressure between the movable pressure roller 8 and the fixed pressure roller 9 is evenly distributed, and ensures the accuracy and quality of the initial bonding of the leather.

[0032] It will be apparent to those skilled in the art that this invention is not limited to the details of the exemplary embodiments described above, and that it can be implemented in other specific forms without departing from the spirit or essential characteristics of this invention. Therefore, the embodiments should be considered illustrative and non-limiting in all respects, and the scope of this invention is defined by the appended claims rather than the foregoing description. Thus, it is intended that all variations falling within the meaning and scope of equivalents of the claims be included within this invention. No reference numerals in the claims should be construed as limiting the scope of the claims.

Claims

1. A bonding device for composite leather processing, comprising a worktable (1), characterized in that: A fixed base (5) is welded and installed at the middle position of the upper surface of the workbench (1). A mounting frame (7) is installed inside the fixed base (5). A movable pressure roller (8) is rotatably installed inside the mounting frame (7). A groove is provided on the workbench (1) below the movable pressure roller (8). A fixed pressure roller (9) is rotatably installed inside the groove. A hydraulic lifting device (6) is fixedly installed at the top of the fixed base (5), and the movable end of the hydraulic lifting device (6) is fixed to the mounting frame (7). A rear end of the fixed base (5) is provided with A pressing table (10) is slidably limited to the worktable (1). Electric push rods (12) are installed on both sides of the pressing table (10), and the fixed end of the electric push rod (12) is fixed to the worktable (1). A mounting base (11) is provided above the pressing table (10), and the two sides of the bottom of the mounting base (11) are fixed to the movable end of the electric push rod (12). An ultrasonic pressing assembly is provided inside the mounting base (11). The ultrasonic pressing assembly consists of an ultrasonic generator, a transducer (13), an amplitude transformer (17), and an ultrasonic pressure plate (16).

2. The bonding device for composite leather processing according to claim 1, characterized in that: The ultrasonic generator is built inside the base of the workbench (1). The transducers (13) are arranged in a rectangular array on the top of the mounting base (11). The ultrasonic pressure plate (16) is installed at the bottom of the mounting base (11). The upper and lower ends of the amplitude transformer (17) are connected to the transducers (13) and the ultrasonic pressure plate (16) respectively.

3. The bonding device for composite leather processing according to claim 2, characterized in that: The workbench (1) has a mounting slot (18) at its rear end. The mounting slot (18) has multiple pressure sensors (20) arranged in a rectangular array inside. The signal output end of the pressure sensor (20) is connected to a microcontroller, and the output end of the microcontroller is connected to an electric push rod (12). A detection plate (19) is installed on the upper end of the pressure sensor (20).

4. The bonding device for composite leather processing according to claim 3, characterized in that: The detection plate (19) is slidably limited to the worktable (1), and a damping and shock absorption mechanism (21) is installed between the detection plate (19) and the pressing table (10). The damping and shock absorption mechanism (21) consists of a damper and a shock absorption spring.

5. The bonding device for composite leather processing according to claim 1, characterized in that: The front end of the workbench (1) is equipped with a first leather material feeding roller (2). A feeding frame (3) is welded and fixed to the front side of the upper end face of the workbench (1). The feeding frame (3) is equipped with a second leather material feeding roller (4) distributed vertically. The first leather material feeding roller (2) and the second leather material feeding roller (4) are both equipped with electric heating rods (15). The two ends of the electric heating rods (15) are fixed to the workbench (1) and the feeding frame (3) respectively. The outer wall of the electric heating rods (15) is connected to the first leather material feeding roller (2) and the second leather material feeding roller (4) respectively through bearings.

6. The bonding device for composite leather processing according to claim 1, characterized in that: The rear end of the workbench (1) is equipped with a discharge roller (14) via a rotating shaft.

7. The bonding device for composite leather processing according to claim 1, characterized in that: The inner side of the fixed base (5) longitudinal frame is provided with a limiting groove (22), and the outer side of the mounting frame (7) longitudinal frame is provided with a guide block (23), and the guide block (23) slides and limits the limiting groove (22).

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