A corrugated board flattening device

Abstract

This utility model belongs to the technical field of corrugated cardboard processing equipment, and in particular to a corrugated cardboard flattening device. A flattening roller for flattening the corrugated cardboard is arranged directly above the support roller. Three support rollers and three flattening rollers are provided, and each pair corresponds to one support roller. A geared motor for providing power is installed on the side of the frame. A pulley frame for power transmission is installed between the output shaft of the geared motor and the end of one of the support rollers. A pressure adjusting component is provided between the frame and the flattening roller. This component can be adjusted by telescoping to directly change the pressure of the flattening roller on the corrugated cardboard. The operator can adjust the flattening pressure in real time according to the thickness, flute type, and material hardness of the cardboard: for thicker, harder double / triple corrugated cardboard, the pressure can be increased to ensure a smooth surface; for thinner, easily deformable single / E-flute cardboard, the pressure can be reduced to avoid corrugation crushing.

Description

Technical Field

[0001] This utility model belongs to the technical field of corrugated cardboard processing equipment, specifically relating to a corrugated cardboard flattening device. Background Technology

[0002] In the corrugated cardboard processing industry, the flattening process is a crucial step in ensuring the precision of subsequent processes such as cutting, printing, and forming. Currently, most corrugated cardboard flattening devices on the market adopt a structural design of "single set of support rollers + single set of flattening rollers" or "multiple sets of constant speed rollers," which presents several technical challenges in practical applications. Poor pressure adjustment adaptability: Traditional pressing rollers often have fixed pressure settings or can only be adjusted through cumbersome mechanical disassembly, making it impossible to flexibly adapt the pressure according to the thickness of the corrugated cardboard (such as single-wall, double-wall, and triple-wall structures) and the hardness of the material. When the pressure is too low, indentations and warping on the cardboard surface cannot be effectively smoothed, affecting the accuracy of subsequent processing; when the pressure is too high, the corrugated structure is easily crushed, reducing the cardboard's load-bearing strength and cushioning performance, resulting in product scrap.

[0003] Cardboard transport is prone to wrinkles and misalignment: In existing multi-roller flattening devices, each set of support rollers typically uses a design with the same speed transmission (such as through the same drive shaft or gears with equal tooth count). Because corrugated cardboard undergoes slight stretching or shrinkage deformation during flattening, the support rollers traveling at the same speed cannot provide continuous and stable traction. This makes the cardboard prone to localized accumulation and wrinkles during transport, or misalignment due to uneven force on both sides. This not only affects the flattening effect but may also cause edge wear, reducing the product yield.

[0004] As the packaging industry continues to demand higher processing precision and product quality from corrugated cardboard, there is an urgent need for a corrugated cardboard flattening device that can flexibly adjust the flattening pressure and provide stable traction to address the shortcomings of existing technologies. Utility Model Content

[0005] This utility model addresses the shortcomings of existing technologies by providing a corrugated cardboard flattening device, the specific technical solution of which is as follows: A corrugated cardboard flattening device includes a frame, on which support rollers for supporting corrugated cardboard are rotatably mounted. A flattening roller for flattening the corrugated cardboard is positioned directly above the support rollers. Three support rollers and three flattening rollers are provided, with each pair corresponding to the previous one. A geared motor for providing power is mounted on the side of the frame. A pulley frame for power transmission is mounted between the output shaft of the geared motor and the end of one of the support rollers. A transmission gear is mounted at the end of the support roller. Driven gears meshing with the transmission gears are rotatably mounted on the side surface of the frame. Two driven gears are located between the three transmission gears, and the number of teeth on the three transmission gears from the power input end to the power output end are 101, 100, and 99, respectively. The number of teeth on both driven gears is 100. A pressure adjusting component for adjusting the pressure during corrugated cardboard flattening is provided between the frame and the flattening roller.

[0006] Preferably, the pressure regulating component includes two parallel stop rods welded to the upper surface of the frame, an end plate welded to the end of the shaft of the flattening roller, and the end plate sliding on the outer surface of the stop rods. An electric push rod is also installed on the surface of the stop rods. A pressure sensor is installed on the telescopic end of the electric push rod. A push plate is installed on the upper end of the pressure sensor. A guide rod is welded to the upper surface of the push plate, and the guide rod is movably installed in a hole opened on the surface of the end plate. A spring is sleeved on the guide rod, and the two ends of the spring are respectively welded to the surface of the end plate and the push plate.

[0007] Preferably, the electric push rod and the guide rod are coaxial.

[0008] Preferably, the electric push rod and the stop rod are parallel.

[0009] Preferably, the drive gear and the driven gear are on the same plane.

[0010] Compared with the prior art, the beneficial effects of this utility model are: 1. Flexible and precise pressure adjustment, adaptable to diverse cardboard specifications: The device features a pressure adjusting component between the frame and the flattening roller. This component can be extended or retracted to directly change the pressure of the flattening roller on the corrugated cardboard. Operators can adjust the pressure in real time to the optimal flattening pressure based on the cardboard's thickness, flute type, and material hardness: for thicker, harder double / triple corrugated cardboard, the pressure can be increased to ensure a smooth surface; for thinner, more easily deformed single / E-flute cardboard, the pressure can be reduced to prevent corrugation crushing. This not only improves the versatility of the flattening effect but also ensures the structural strength of the cardboard, reduces product scrap rates, and covers the vast majority of common corrugated cardboard specifications, meeting diverse production needs.

[0011] 2. Multi-roller differentiated transmission provides stable traction and eliminates wrinkles and deviations: The device adopts a differentiated transmission structure of "three support rollers + two driven gears". The number of teeth on the transmission gears at the ends of the three support rollers is 101, 100, and 99 respectively from the power input end to the output end. The two driven gears each have 100 teeth, and the driven gears mesh with the transmission gears. According to the gear transmission principle, the number of teeth is inversely proportional to the rotational speed (when the speed of the driving wheel is fixed, the fewer the teeth on the driven wheel, the higher the speed). Therefore, the rotational speed of the three support rollers increases sequentially from the input end to the output end (the transmission ratios are 101:100, 100:100, and 99:100 respectively), forming a differentiated transmission speed of "slow at the front and fast at the back". This design ensures that the corrugated cardboard is constantly subjected to a continuous traction force from the rear support rollers during the flattening process, effectively stretching the cardboard and preventing localized accumulation and wrinkles. At the same time, the traction force is evenly applied to the cardboard surface, preventing deviation caused by uneven force on both sides, ensuring that the cardboard remains flat and centered during transport. The flatness error of the cardboard after flattening can be reduced by more than 30%, significantly improving the product qualification rate.

[0012] 3. Synergistic effect of flattening and traction improves cardboard processing accuracy and strength: The traction force from differentiated transmission and the flattening pressure adjusted by the pressure regulating component create a synergistic effect: the traction force ensures that the cardboard is always taut during the flattening process, allowing the pressure of the flattening roller to be applied evenly to the cardboard surface, effectively smoothing out defects such as dents and warping; at the same time, the appropriate traction force can also slightly stretch and shape the cardboard, further improving its flatness. Compared with traditional devices, the cardboard surface flattened by this device has a higher degree of flatness, and the positioning accuracy during subsequent cutting and printing is improved by more than 25%. Moreover, because the corrugated structure is not excessively crushed, the load-bearing strength and cushioning performance of the cardboard can be maintained at more than 90% of the original level, balancing processing accuracy and product performance. Attached Figure Description

[0013] Figure 1 This is a three-dimensional structural schematic diagram of the present invention; Figure 2 This is a three-dimensional schematic diagram of the present invention. Figure 3 This is a schematic diagram of the disassembled structure of the parts of this utility model; Figure 4 for Figure 2 A magnified structural diagram of point A in the middle.

[0014] Reference numerals: 1. Frame; 2. Support roller; 3. Flattening roller; 4. Pressure adjusting component; 41. Stop bar; 42. End plate; 43. Electric push rod; 44. Pressure sensor; 45. Push plate; 46. Guide rod; 47. Spring; 5. Gearbox; 6. Pulley frame; 7. Transmission gear; 8. Driven gear; 9. Corrugated cardboard. Detailed Implementation

[0015] The technical solution of this utility model will now be described with reference to the accompanying drawings and embodiments.

[0016] Please see Figure 1-4 This embodiment provides the following technical solution: a corrugated cardboard flattening device, including a frame 1, on which a support roller 2 for supporting corrugated cardboard 9 is rotatably mounted, and a flattening roller 3 for flattening corrugated cardboard 9 is arranged directly above the support roller 2. There are three support rollers 2 and three flattening rollers 3, and the support rollers 2 and flattening rollers 3 correspond one-to-one. A geared motor 5 for providing power is installed on the side of the frame 1. A pulley frame 6 for power transmission is installed between the output shaft of the geared motor 5 and the end of one of the support rollers 2. A transmission gear 7 is installed at the end of the support roller 2. A driven gear 8 that meshes with the transmission gear 7 is rotatably mounted on the side surface of the frame 1. Two driven gears 8 are located between the three transmission gears 7, and the number of teeth of the three transmission gears 7 from the power input end to the power output end are 101, 100, and 99, respectively. The number of teeth of the two driven gears 8 is 100. A pressure adjusting component 4 for adjusting the pressure when the corrugated cardboard 9 is flattened is arranged between the frame 1 and the flattening roller 3.

[0017] In this embodiment, the transmission gears 7 installed at the ends of the three support rollers 2 and the two driven gears 8 installed on the side surface of the frame 1, with the number of teeth of the three transmission gears 7 from the power end to the output end being 101, 100, and 99 respectively, and the number of teeth of the two driven gears 8 being 100 each, cause the output power of the three support rollers 2 to increase sequentially under the action of the transmission gears 7 and driven gears 8. This allows the corrugated cardboard 9 to be flattened while also being subjected to traction, thus facilitating the tightening of the corrugated cardboard 9 during flattening and increasing its flatness. The pressure adjusting component 4 is provided between the frame 1 and the flattening roller 3, and the pressure adjusting component 4 adjusts the pressure of the flattening roller 3 on the corrugated cardboard 9 by telescoping, thus facilitating the selection of appropriate pressure for flattening the corrugated cardboard 9 according to its specifications.

[0018] Specifically, the pressure regulating component 4 includes two parallel stop rods 41 welded to the upper surface of the frame 1, an end plate 42 welded to the end of the shaft of the flattening roller 3, and the end plate 42 sliding on the outer surface of the stop rods 41. An electric push rod 43 is also installed on the surface of the stop rods 41. A pressure sensor 44 is installed on the telescopic end of the electric push rod 43. A push plate 45 is installed on the upper end of the pressure sensor 44. A guide rod 46 is welded to the upper surface of the push plate 45, and the guide rod 46 is movably installed in a hole opened on the surface of the end plate 42. A spring 47 is sleeved on the guide rod 46, and the two ends of the spring 47 are respectively welded to the surfaces of the end plate 42 and the push plate 45. The electric push rod 43 and the guide rod 46 are coaxial, and the electric push rod 43 and the stop rods 41 are parallel.

[0019] In this embodiment, a pressure regulating component 4 is used, consisting of a stop bar 41, an end plate 42, an electric push rod 43, a pressure sensor 44, a push plate 45, a guide rod 46, and a spring 47. Two parallel stop bars 41 welded to the upper surface of the frame 1 are used to limit the end plate 42, so that the end plate 42 slides outside the stop bar 41 when the flattening roller 3 moves up and down. The electric push rod 43 installed on the surface of the frame 1 extends or retracts through its telescopic end to adjust the distance between the telescopic end of the electric push rod 43 and the end plate 42, thereby facilitating the compression or stretching of the guide rod 46. The pressure sensor 44 is used to monitor the pressure or tension of the guide rod 46 on the push plate 45, thereby achieving the purpose of adjusting the pressure of the flattening roller 3 on the corrugated cardboard 9.

[0020] Specifically, the drive gear 7 and the driven gear 8 are on the same plane, which facilitates the meshing of the drive gear 7 and the driven gear 8.

[0021] The above description is only a preferred embodiment of the present utility model and is not intended to limit the present utility model. Any modifications, equivalent substitutions and improvements made within the spirit and principles of the present utility model should be included within the protection scope of the present utility model.

Claims

1. A corrugated cardboard flattening device, comprising a frame (1), wherein a support roller (2) for supporting corrugated cardboard (9) is rotatably mounted on the frame (1), and a flattening roller (3) for flattening the corrugated cardboard (9) is disposed directly above the support roller (2), characterized in that: There are three support rollers (2) and three flattening rollers (3), and the support rollers (2) and flattening rollers (3) correspond one to one. A geared motor (5) for providing power is installed on the side of the frame (1). A pulley frame (6) for power transmission is installed on the output shaft of the geared motor (5) and the end of one of the support rollers (2). A transmission gear (7) is installed at the end of the support roller (2). A driven gear (8) meshing with the transmission gear (7) is rotatably installed on the side surface of the frame (1). The two driven gears (8) are located between the three transmission gears (7). The number of teeth of the three transmission gears (7) from the power input end to the power output end are 101, 100 and 99 respectively. The number of teeth of the two driven gears (8) is 100. A pressure adjusting component (4) for adjusting the pressure when the corrugated cardboard (9) is flattened is provided between the frame (1) and the flattening roller (3).

2. A corrugated paperboard flattening device according to claim 1, characterized in that: The pressure regulating component (4) includes two parallel baffles (41) welded to the upper surface of the frame (1). The shaft end of the flattening roller (3) is welded with an end plate (42), and the end plate (42) slides on the outer surface of the baffles (41). An electric push rod (43) is also installed on the surface of the baffles (41). A pressure sensor (44) is installed on the telescopic end of the electric push rod (43). A push plate (45) is installed on the upper end of the pressure sensor (44). A guide rod (46) is welded to the upper surface of the push plate (45), and the guide rod (46) is movably installed in a hole opened on the surface of the end plate (42). A spring (47) is sleeved on the guide rod (46), and the two ends of the spring (47) are respectively welded to the surface of the end plate (42) and the push plate (45).

3. The corrugated cardboard flattening device according to claim 2, characterized in that: The electric push rod (43) and the guide rod (46) are coaxial.

4. A corrugated paperboard flattening device according to claim 2, characterized in that: The electric push rod (43) and the stop rod (41) are parallel.

5. A corrugated paperboard flattening device according to claim 1, wherein: The drive gear (7) and the driven gear (8) are on the same plane.

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