Cooling device and cooling method for a hot press compounding machine cylinder

Abstract

The application discloses a cooling device and cooling method for a hot-pressing compound machine roller, and relates to the technical field of paper product processing equipment. The cooling device comprises a machine body, a heating assembly, a driving assembly and a cooling assembly. Corrugated rollers and pressure rollers are rotatably arranged on the machine body. The heating assembly is used for increasing the surface temperature of the corrugated rollers. The driving assembly is used for driving the corrugated rollers and the pressure rollers to rotate. The cooling assembly comprises an ice-water machine and a rotary connecting part. Cooling cavities are coaxially arranged in the pressure rollers. The cooling cavities are communicated with the ice-water machine through the rotary connecting part. The ice-water machine is used for injecting circulating cooling liquid into the cooling cavities. The cooling assembly is used for cooling the pressure rollers, so that the melting of PE film on the film-coated paper caused by high temperature can be avoided, and the stable operation of the equipment can be ensured.

Description

Technical Field

[0001] This invention relates to the field of paper product processing equipment technology, specifically to a cooling device and cooling method for a hot press laminating machine roller. Background Technology

[0002] Integrated corrugated paper cups are widely used in the hot beverage packaging industry due to their excellent heat insulation and anti-scalding properties and structural integrity. Their automated production equipment typically includes an online single-face corrugated composite module, which presses the flat PE-coated paper into a corrugated shape at the end opposite the PE film, forming a single-face corrugated cardboard for subsequent cup body forming.

[0003] Existing online single-sided corrugated composite modules mainly include corrugated rollers and pressure rollers. PE coated paper passes through the gap between the corrugated rollers and pressure rollers. The PE film on the PE coated paper is adhered to the surface of the pressure roller. The corrugated roller is usually equipped with a heating device, which is mainly used to heat the surface of the corrugated roller to about 200°C to ensure that the corrugated roller can press corrugated marks on the PE coated paper at the end away from the PE film.

[0004] However, the high temperature of the corrugated roll continuously transfers a large amount of heat to the pressure roll that it is in close contact with through contact conduction and thermal radiation. The PE coating layer of the coated paper is a heat-sensitive material, and its softening point or melting point is usually much lower than the temperature of the corrugated roll. When the surface temperature of the pressure roll becomes too high due to continuous heating, at the moment of pressing, the high-temperature pressure roll will directly contact the PE film surface of the coated paper, causing the PE film to melt, soften, stretch, or even adhere to the surface of the pressure roll. This results in a significant reduction in the yield of corrugated board and also requires downtime for cleaning, leading to a significant decrease in production efficiency. Summary of the Invention

[0005] To solve the above problems, the present invention provides the following technical solution: Firstly, a cooling device for a hot press laminating machine roller, comprising: The machine body, on which corrugated rollers and pressure rollers are rotatably mounted; Heating components; used to increase the surface temperature of corrugated rolls; Drive assembly; used to drive the corrugated rolls and pressure rolls to rotate; The cooling assembly includes a chiller and a rotating connector. A cooling chamber is coaxially formed inside the pressure roller. The cooling chamber is connected to the chiller through the rotating connector. The chiller is used to inject circulating cooling liquid into the cooling chamber.

[0006] Preferably, the cooling component further includes a heat exchanger: A flow equalization cylinder is coaxially and fixedly arranged inside the cooling chamber. Both ends of the flow equalization cylinder are fixedly connected to and communicate with the rotary connection part. A plurality of flow equalization holes are evenly opened on the outer peripheral wall of the flow equalization cylinder, which allows the flow equalization cylinder to communicate with the cooling chamber. A pressurization chamber is provided inside the flow equalization cylinder. A water spray slit is opened on the surface of the flow equalization cylinder, which communicates with the pressurization chamber. The water spray slit is directly facing the contact part between the pressure roller and the coating paper. A pressure booster, driven by the rotation of a pressure roller, is used to increase the pressure of the liquid inside the pressure booster chamber. The adjustment unit can adjust the pressurization intensity of the pressurizing component on the liquid in the pressurizing chamber according to the rotation speed of the pressure roller, thereby adjusting the cooling intensity of the cooling component on the contact part between the pressure roller and the coated paper.

[0007] Preferably, the booster includes: a first drive gear ring and a second drive gear ring, the first drive gear ring being rotatably mounted at the connection between the booster chamber and the rotating connection, an impeller being coaxially fixedly mounted inside the first drive gear ring, and the second drive gear ring being coaxially fixedly mounted on the cavity wall of the cooling chamber, wherein the outer teeth of the first drive gear ring mesh with the inner teeth of the second drive gear ring.

[0008] Preferably, the impeller includes a base column and multiple blades. The base column is coaxially fixedly mounted on the first drive gear ring, and the multiple blades are rotatably connected to the base column. A placement cavity is provided inside the base column. The adjustment part includes multiple connecting columns and multiple driving components. The multiple connecting columns correspond one-to-one with the multiple blades, and the multiple driving components correspond one-to-one with the multiple driving components. Multiple connecting grooves are provided on the peripheral wall of the base column, and the multiple connecting grooves correspond one-to-one with the multiple connecting columns. One end of the connecting column is fixedly connected to the blade, and the other end of the connecting column extends into the connecting groove. A first limiting component is provided in the connecting groove. The first limiting component is used to restrict the connecting column to rotate only circumferentially within the connecting groove. The driving component is located in the placement cavity. Under the action of centrifugal force, the driving component can drive the connecting column to rotate, thereby changing the angle between the blade and the axis of the base column. A first resetting component is provided on the connecting column for resetting the connecting column.

[0009] Preferably, the driving component includes a driving rod, one end of which is located in the placement cavity, and the other end of which is slidably inserted into the connecting groove. The driving rod is provided with a second limiting member for restricting the driving rod to move only axially. A wedge is provided at the end of the driving rod near the connecting rod, and a corresponding inclined groove is provided at the end of the connecting column near the driving rod. When the wedge on the driving rod moves axially and inserts into the inclined groove, the connecting column rotates circumferentially. A second reset member is provided at the end of the driving rod column located in the placement cavity for resetting the driving rod.

[0010] Preferably, the first limiting member includes a limiting disk, which is coaxially fixedly installed on the peripheral wall of the connecting column, and a limiting ring groove for accommodating the limiting disk is formed on the groove wall of the connecting groove.

[0011] Preferably, the first reset element is a torsion spring, which is coaxially sleeved on the peripheral wall of the connecting column.

[0012] Preferably, the second reset component includes a reset spring located within the limiting square groove. The reset spring is coaxially sleeved on the drive rod, with one end of the reset spring fixedly connected to the groove wall of the limiting square groove and the other end of the reset spring fixedly connected to the limiting block.

[0013] Preferably, the second reset component includes a reset spring located within the limiting square groove. The reset spring is coaxially sleeved on the drive rod, with one end abutting against the wall of the placement groove and the other end abutting against the limiting block.

[0014] Secondly, a cooling method for a hot press laminating machine roller, based on the aforementioned cooling device for a hot press laminating machine roller, includes the following steps: S1: Inject cooling liquid into the cooling chamber inside a rotating pressure roller to cool the pressure roller as a whole. S2: By utilizing the rotation of the pressure roller, a portion of the cooling liquid in the cooling chamber is pressurized, and the pressurized cooling liquid is continuously sprayed onto a specific area on the inner wall of the pressure roller that is in contact with the coated paper, in order to enhance cooling. S3: Based on the change in the rotational speed of the pressure roller, automatically adjust the degree of pressurization of a portion of the cooling liquid in step S2, wherein a higher degree of pressurization is performed when the pressure roller is at a lower rotational speed, and a lower degree of pressurization is performed when the pressure roller is at a higher rotational speed.

[0015] This invention provides a cooling device and method for a roller in a hot press laminating machine. It has the following beneficial effects: I. This invention achieves precise temperature control of the pressure roller by combining overall cooling with localized enhanced cooling, and adaptively adjusting the intensity of localized enhanced cooling in a negative correlation with the pressure roller rotation speed. During low-speed operation, heat tends to accumulate locally. This invention automatically applies maximum localized cooling, effectively suppressing instantaneous temperature rise in that area and preventing product defects such as melting of the PE layer of the coated paper, roller sticking, or tensile deformation caused by localized overheating. During high-speed operation, heat is easily homogenized. This invention automatically reduces the intensity of localized cooling, avoiding over-cooling of the roller body and maintaining the uniformity and stability of the overall roller surface temperature. Therefore, this invention significantly improves the overall product yield and production line efficiency. II. The cooling intensity adjustment unit in this invention is a purely mechanical structure, with its power source entirely derived from the centrifugal force generated by the rotation of the pressure roller. Through the precise coordination of internal mechanical components such as the drive unit, connecting column, and variable geometry impeller, this adjustment unit directly converts the magnitude of the centrifugal force into a change in the impeller's pressurization capacity, establishing an inverse proportional relationship between cooling intensity and rotational speed. This system requires no external sensors, electronic control units, or independent power sources, thus exhibiting a simple structure, low cost, rapid response, and extremely high operational reliability and durability in industrial environments. Third, this invention employs a forced convection heat transfer method by setting a pressurization chamber inside the pressure roller and directly spraying the pressurized cooling liquid through a water spray slit onto the heat-concentrated area of ​​the inner wall of the pressure roller. Compared with traditional immersion or ordinary convection heat transfer, this method has a higher local heat transfer coefficient and can remove locally accumulated heat more quickly. This precise and efficient heat removal capability for heat-loaded areas greatly ensures the temperature stability of the key working surfaces of the pressure roller and the uniformity of the overall surface temperature, thereby greatly guaranteeing product quality. Attached Figure Description

[0016] Figure 1 This is a schematic diagram of the overall structure of Embodiment 1 of this application; Figure 2 This is a front cross-sectional view of the overall structure of Embodiment 1 of this application; Figure 3 for Figure 2 Enlarged structural diagram at point A; Figure 4 for Figure 2 Enlarged structural diagram at point B; Figure 5 for Figure 4 Enlarged structural diagram at point C; Figure 6 This is a schematic diagram of the pressurizing component in Embodiment 1 of this application; Figure 7 This is a schematic diagram of the overall structure of the booster component in Embodiment 1 of this application; Figure 8 This is a schematic diagram of the flow equalization cylinder in Embodiment 1 of this application; Figure 9 This is a schematic diagram of the impeller structure in Embodiment 1 of this application; In the diagram: 1. Machine body; 11. Corrugated roller; 12. Pressure roller; 121. Cooling chamber; 2. Heating assembly; 3. Drive assembly; 4. Cooling assembly; 41. Chiller; 42. Rotary connection; 421. Fixed housing; 422. Rotor; 423. Inner tube; 4231. Clearance groove; 43. Flow equalization cylinder; 431. Flow equalization hole; 432. Pressurization chamber; 433. Spray slit; 44. Pressurization component; 441. Impeller; 4411. Base column; 4412. Blade; 4413. Connection 442. Groove; 443. First drive gear ring; 444. Second drive gear ring; 445. Mounting bracket; 446. Cross; 45. Adjustment part; 451. Connecting column; 4511. Inclined groove; 452. Drive component; 4521. Drive rod; 4522. Inclined block; 453. First limiting component; 4531. Limiting disc; 4532. Limiting ring groove; 454. First reset component; 455. Second limiting component; 4551. Limiting block; 4552. Limiting square groove; 456. Second reset component. Detailed Implementation

[0017] The present invention will now be described in further detail with reference to the accompanying drawings and specific embodiments. The embodiments of the present invention are given for illustrative and descriptive purposes only, and are not intended to be exhaustive or to limit the invention to the forms disclosed. Many modifications and variations will be apparent to those skilled in the art. The embodiments were chosen and described to better illustrate the principles and practical application of the invention, and to enable those skilled in the art to understand the invention and design various embodiments with various modifications suitable for a particular purpose.

[0018] like Figures 1-9 As shown, the present invention provides a technical solution: a cooling device and cooling method for a hot press laminating machine roller. Example 1

[0019] A cooling device for the roller of a hot press laminating machine, as described in the following reference. Figure 1-9 It includes a body 1, a heating component 2, a driving component 3, and a cooling component 4.

[0020] Reference Figure 1 and Figure 2For ease of demonstration, this embodiment only shows some components of the hot press laminating machine, which includes a machine body 1. A corrugated roller 11 and a pressure roller 12 are rotatably mounted on the machine body 1. Both the corrugated roller 11 and the pressure roller 12 are arranged horizontally and coaxially. A gap is left between the pressure roller 12 and the corrugated roller 11 for the coated paper to pass through. The surface of the corrugated roller 11 is provided with corrugated teeth, and the surface of the pressure roller 12 is smooth. In actual operation, when the coated paper passes through the gap between the corrugated roller 11 and the pressure roller 12, the PE film on the coated paper adheres to the surface of the pressure roller 12, and the corrugated roller 11 presses out corrugated marks on the side of the coated paper away from the PE film.

[0021] In this embodiment, the heating component 2 is actually a steam supply device. The external steam supply device introduces high-temperature steam into the surface of the corrugated roller 11, thereby increasing the surface temperature of the corrugated roller 11 and facilitating the pressing of corrugated marks onto the coated paper. In practical applications, the steam supply device can be set as an industrial boiler. This is existing technology and will not be elaborated further here.

[0022] In this embodiment, the drive component 3 is a combination of a motor and a synchronous belt. Both the motor and the synchronous belt are located on one side of the machine body 1. The output shaft of the motor is coaxially and rotatably connected to the pressure roller 12. The output shaft of the motor is also connected to the corrugated roller 11 through a pulley. When the motor starts, it drives the pressure roller 12 and the corrugated roller 11 to rotate. This is existing technology and will not be described in detail here.

[0023] Reference Figure 2 and Figure 3In this embodiment, the cooling component 4 includes a chiller 41 and a rotary connector 42. In this embodiment, a cooling chamber 121 is coaxially formed inside the pressure roller 12. The rotary connector 42 is mounted on the machine body 1. One end of the rotary connector 42 is coaxially connected to the cooling chamber 121 inside the pressure roller 12, and the other end of the rotary connector 42 is connected to the chiller 41. Specifically, the rotary connector 42 in this embodiment is an H-type rotary joint, which mainly includes a fixed housing 421, a rotor 422, and an inner tube 423. The fixed housing 421 is fixedly mounted on the machine body 1. One end of the rotor 422 is rotatably connected to the fixed housing 421, and the other end of the rotor 422 is coaxially fixedly connected to the pressure roller 12. The inner tube 423 is coaxially arranged inside the fixed housing 421 and coaxially located inside the rotor 422. The inner tube 423 is fixedly connected to the fixed housing 421. The fixed housing 421 has an inlet and an outlet. The inlet on the fixed housing 421 is connected to the chiller 41. The water pumps 41 are connected by pipes. One end of the inner tube 423 is coaxially arranged with the water inlet to facilitate the entry of external liquid into the inner tube 423. The other end of the inner tube 423 extends into the cooling chamber 121 inside the pressure roller 12 so that the coolant can be introduced into the cooling chamber 121 inside the pressure roller 12. After the cooling work is completed, the liquid in the cooling chamber 121 flows into the space between the rotor 422 and the inner tube 423 through the opening at the connection between the rotor 422 and the pressure roller 12, and then flows back into the fixed housing 421 and finally is discharged from the outlet. The H-type rotary joint is existing technology and will not be described in detail here.

[0024] The chiller 41 in this embodiment is prior art and will not be described in detail here. The chiller 41 is connected to the inlet of the fixed housing 421 through a pipe, and at the same time, the chiller 41 is connected to the outlet of the fixed housing 421 through a pipe. The chiller 41 can continuously pump the produced coolant into the cooling chamber 121 inside the pressure roller 12 through the pipe and the inner pipe 423. The coolant in the cooling chamber 121 of the pressure roller 12 absorbs the heat in the pressure roller 12, and then flows back to the fixed housing 421 and flows back into the chiller 41 from the outlet, thereby achieving the cooling effect of the pressure roller 12.

[0025] Therefore, before rolling the coated paper, the heating component 2 is activated to heat the corrugated roller 11, increasing the surface temperature of the corrugated roller 11 so that the corrugated roller 11 can press corrugated marks on the side of the coated paper away from the PE film. At the same time, the cooling component 4 is activated to reduce the surface temperature of the pressure roller 12 by circulating cooling liquid into the cooling chamber 121 inside the pressure roller 12. This avoids product defects such as melting of the PE layer of the coated paper, sticking to the roller, or stretching deformation due to excessive temperature, thus ensuring the pass rate of corrugated board production. At the same time, the PE of the coated paper will not adhere to the surface of the pressure roller 12, so there is no need to stop the machine to clean the surface of the pressure roller 12, thus ensuring the production efficiency of the product.

[0026] Among them, reference Figure 2 , Figure 5 and Figure 6 In this embodiment, the cooling component 4 also includes a flow equalization cylinder 43. The flow equalization cylinder 43 is coaxially located inside the cooling chamber 121 of the pressure roller 12. One end of the flow equalization cylinder 43 is coaxially and fixedly connected to the inner tube 423. A gap is left between the outer peripheral wall of the flow equalization cylinder 43 and the cavity wall of the cooling chamber 121. A plurality of flow equalization holes 431, communicating with the internal space of the flow equalization cylinder 43, are evenly distributed on the peripheral wall of the flow equalization cylinder 43. When the chiller 41 pumps coolant from the inner tube 423, the coolant in the inner tube 423 first enters the flow equalization cylinder 43, and then sprays out from the flow equalization holes 431 on the flow equalization cylinder 43. The coolant sprayed from the flow equalization holes 431 contacts the cavity wall of the cooling chamber 121 of the pressure roller 12. Then, the coolant located between the flow equalization cylinder 43 and the wall of the cooling chamber 121 begins to absorb heat from the pressure roller 12 and flows back to the outlet on the solid shell. It then flows back to the chiller 41 through a pipe. This achieves the cooling effect on the pressure roller 12 and the circulation of the coolant. Since the multiple flow equalization holes 431 on the flow equalization cylinder 43 are relatively evenly distributed, the flow equalization cylinder 43 can relatively evenly disperse the coolant flowing from the inner tube 423 in the cooling chamber 121, thereby making the heat dissipation effect on each part of the pressure roller 12 as uniform as possible, and thus making the temperature of the pressure roller 12 surface as consistent as possible. Therefore, in this embodiment, the PE layer of the coated paper is in a relatively optimal and safe process temperature range throughout the entire composite width. This not only fundamentally avoids fatal defects such as PE film melting, sticking to the roller, stretching deformation, or decreased gloss caused by local overheating, but also effectively suppresses the warping problem of the later product caused by uneven internal stress by ensuring the consistency of the heating temperature of each part of the PE layer, thereby comprehensively ensuring the physical performance stability and appearance quality of the final product.

[0027] In this embodiment, a pressure boosting chamber 432 is also provided inside the flow equalization cylinder 43 (in conjunction with...). Figure 8In this embodiment, the pressurizing chamber 432 is arranged along the axis of the flow equalization cylinder 43. The cross-section of the pressurizing chamber 432 is set as an inverted Ω shape. The end of the pressurizing chamber 432 near the inner tube 423 is connected to the inner tube 423. A water spray slit 433 communicating with the pressurizing chamber 432 is opened directly above the flow equalization cylinder 43. In this embodiment, the water spray slit 433 is also arranged along the axis of the flow equalization cylinder 43, and the length of the water spray slit 433 is the same as the length of the pressurizing chamber 432. The part of the pressure roller 12 in contact with the coating paper is also directly above the flow equalization cylinder 43. When the coolant flows from the inner tube 423 to the flow equalization cylinder 43, most of the coolant flows into the interior of the flow equalization cylinder 43 and then sprays out from the flow equalization hole 431. A small part of the coolant flows into the pressurizing chamber 432 and then sprays from the water spray slit 433 onto the wall of the cooling chamber 121 located directly above. In actual operation, the main heat source path of the pressure roller 12 is the corrugated roller 11 and the coated paper. Therefore, the hottest part of the rotating pressure roller 12 is always the part in contact with the coated paper, and this part is always directly above the water spray slit 433. Therefore, the temperature of the part of the pressure roller 12 directly above the water spray slit 433 is relatively higher than that of other parts. In this embodiment, due to the setting of the pressurizing chamber 432 and the water spray slit 433, after the coolant fills the pressurizing chamber 432, it will flow towards the water spray slit 433. And because of the pressurizing chamber in this embodiment... The cross-section of 432 is an inverted Ω shape. Therefore, as the coolant flows from the pressurizing chamber 432 to the spray slit 433, the coolant channel becomes narrower and narrower. As a result, the coolant at the spray slit 433 has a strong pressure, meaning that the coolant sprayed from the spray slit 433 has strong kinetic energy. Furthermore, the coolant sprayed from the spray slit 433 is directed towards the part of the pressure roller 12 with the highest temperature. Therefore, the coolant flow velocity at the cavity wall of the part of the cooling chamber 121 with the highest temperature is also the highest. In other words, the heat dissipation at the part of the pressure roller 12 with the highest temperature is also the fastest.

[0028] Therefore, overall, the cooling effect of the coolant on the part of the pressure roller 12 with the highest surface temperature is the best, while the cooling effect on other parts of the pressure roller 12 with relatively lower temperatures is also maintained at a normal level. It can not only keep the temperature of the pressure roller 12 surface as uniform as possible, but also, in this embodiment, the coolant sprayed from the water spray slit 433 cools the part of the pressure roller 12 receiving heat in the strongest way as soon as the heat is transferred to the pressure roller 12. Compared with the method of cooling down the entire roller body after the temperature rises in the prior art, in this embodiment, the heat is carried away by the strong jet the moment it is transferred from the coated paper to the surface of the pressure roller 12. This compresses the temperature fluctuation range of the pressure roller 12 surface to the extreme, thus ensuring that the temperature of the key working parts of the pressure roller 12 remains stable for a long time. Since the temperature of the pressure roller 12 surface is actively limited to a relatively low level, the temperature difference between the coated paper and the pressure roller 12 surface is extremely large when they come into contact. The direction of heat transfer is instantaneous and unidirectional, flowing from the coated paper to the pressure roller 12 surface. The pressure roller 12 surface has almost no chance to transfer the heat it has accumulated back to the PE layer of the coated paper. This not only avoids the melting of the PE layer, but also minimizes its heating time and preserves the original physical properties of the PE film as much as possible.

[0029] Furthermore, refer to Figure 5 , Figure 6 and Figure 7In this embodiment, a pressure boosting component 44 for increasing the pressure of the cooling liquid in the pressure boosting chamber 432 is also provided at the connection between the pressure boosting chamber 432 and the inner tube 423. The pressure boosting component 44 includes a first drive gear ring 442 and a second drive gear ring 443. A mounting bracket 444 is fixedly provided on the inner wall of the inner tube 423. A cross 445 is rotatably provided on the mounting bracket 444. The first drive gear ring 442 is coaxially fixedly sleeved on the cross 445. A groove is opened on the peripheral wall of the inner tube 423. The first drive gear ring 442 extends into the space between the outer wall of the inner tube 423 and the cavity wall of the cooling chamber 121 through the clearance groove 4231. Teeth are provided on the outer peripheral wall of the first drive gear ring 442. The second drive gear ring 443 is coaxially fixedly installed on the cavity wall of the cooling chamber 121. Teeth are provided on the inner peripheral wall of the second drive gear ring 443. The first drive gear ring 442 and the second drive gear ring 443 mesh with each other. The cross 445 also has… An impeller 441 is coaxially fixedly connected, with the impeller 441 facing the connection between the pressurizing chamber 432 and the inner tube 423. When the pressure roller 12 rotates, it drives the second drive gear ring 443 to rotate around its own axis. The second drive gear ring 443 drives the first drive gear ring 442 to rotate, thereby driving the cross 445 to rotate, which in turn drives the impeller 441 to rotate. Since the impeller 441 is facing the connection between the pressurizing chamber 432 and the inner tube 423, the impeller 441 draws the coolant in the inner tube 423 into the pressurizing chamber 432 during rotation, ensuring that the liquid pressure in the pressurizing chamber 432 is always at a high level. This ensures that the coolant sprayed from the spray slit 433 maintains a high flow rate, thereby maximizing the cooling effect on the highest temperature part of the pressure roller 12. In addition, the pressurizing component 44 in this embodiment does not require additional energy to drive it, thus achieving a certain degree of energy saving.

[0030] More importantly, in practical applications, the pressure roller 12 operates at a relatively low speed during both the starting and stopping phases, while its speed is relatively high during stable operation. At lower speeds, the contact time between the pressure roller 12 and the coated paper is longer, allowing the lower-speed contact area to absorb more heat compared to the high-speed contact area. Furthermore, the impeller 441 in this embodiment is equipped with an adjustment unit 45, which adjusts the pressure intensity of the pressurizing component 44 on the liquid in the pressurizing chamber 432 according to the pressure roller 12's speed. When the pressure roller 12 is at a low speed, the contact time between the pressure roller 12 and the coated paper is longer. The temperature at the contact area between the pressure roller 12 and the coated paper is relatively high. The regulating part 45 can increase the pressure of the pressurizing component 44 on the liquid in the pressurizing chamber 432, thereby increasing the flow rate of the coolant sprayed from the water spray slit 433, and thus improving the cooling effect on the contact area between the pressure roller 12 and the coated paper. When the pressure roller 12 is at a higher speed, the temperature at the contact area between the pressure roller 12 and the coated paper is relatively low. The regulating part 45 keeps the pressure of the pressurizing component 44 on the liquid in the pressurizing chamber 432 at a lower level, thereby keeping the flow rate of the coolant sprayed from the water spray slit 433 at a relatively low level. At the same time, it keeps the cooling effect on the contact area between the pressure roller 12 and the coated paper at a normal level, so as to avoid the temperature of the contact area between the pressure roller 12 and the coated paper dropping too much, which would lead to uneven surface temperature of the pressure roller 12 and water mist on the surface of the pressure roller 12.

[0031] In this embodiment, the impeller 441 includes a base column 4411 and multiple blades 4412 (combined) Figure 9For ease of demonstration in this embodiment, three blades 4412 are preferred; however, the specific number of blades 4412 depends on the specific circumstances. The base column 4411 is coaxially fixedly mounted on the cross 445. All three blades 4412 are rotatably connected to the outer peripheral wall of the base column 4411. The three blades 4412 are evenly spaced around the axis of the base column 4411. A placement cavity is coaxially formed inside the base column 4411. The adjustment part 45 includes three connecting columns 451 and three driving components 452. Each of the three connecting columns 451 corresponds to one of the three blades 4412 and one of the three driving components 452. Three connecting grooves 4413 communicating with the placement cavity are formed on the peripheral wall of the base column 4411. Each of the three connecting grooves 4413 corresponds to one of the three connecting columns 451. One end of each connecting column 451 is fixedly connected to a blade 4412, and the other end of each connecting column 451 extends into the connecting groove 4413. A first limiting member 453 is provided inside 413. The first limiting member 453 is used to restrict the connecting column 451 to rotate circumferentially only within the connecting groove 4413. The driving member 452 is located in the placement cavity. Under the action of centrifugal force, the driving member 452 can drive the connecting column 451 to rotate, thereby changing the angle between the blade 4412 and the axis of the bottom column 4411. A first resetting member 454 for resetting the connecting column 451 is provided on the connecting column 451. It should be noted that in this embodiment, the initial angle between the blade 4412 and the axis of the bottom column 4411 is set to 45°. At this angle, the axial component force exerted by the blade 4412 on the water flow is the largest, so more cooling liquid can be drawn into the pressurization chamber 432 to increase the liquid pressure in the pressurization chamber 432.

[0032] When the pressure roller 12 rotates, it drives the base column 4411 to rotate via the first drive gear ring 442, the second drive gear ring 443, and the cross 445. At this time, the drive component 452 in the cavity of the base column 4411 will be subjected to centrifugal force. As the drive component 452 drives the connecting column 451 to rotate circumferentially, it will drive the blade 4412 to rotate circumferentially. During the rotation of the blade 4412, the angle between the blade 4412 and the base column 4411 will gradually increase towards 90°. As the angle between the axis of the blade 4412 and the axis of the base column 4411 gradually increases from 45°, the axial force of the blade 4412 on the liquid becomes smaller and smaller. Therefore, the flow rate of liquid drawn into the pressurization chamber 432 by the impeller 441 per unit time also becomes smaller and smaller. As a result, the pressure of the liquid in the pressurization chamber 432 also decreases, that is, the flow rate of the liquid sprayed from the water spray slit 433 also decreases, thereby reducing the cooling effect on the part of the pressure roller 12 in contact with the coated paper. Furthermore, the faster the pressure roller 12 rotates during this process, the faster the bottom column 4411 rotates, and the greater the centrifugal force on the drive component 452. Therefore, the angle at which the drive component 452 drives the blade 4412 to rotate is also larger, meaning that the impeller 441's ability to draw coolant into the pressurization chamber 432 becomes smaller and smaller. Conversely, the lower the speed of the pressure roller 12, the lower the speed of the bottom column 4411, the smaller the centrifugal force on the drive component 452, and the smaller the angle at which the blade 4412 rotates. As the impeller 441's ability to draw coolant into the pressurization chamber 432 becomes larger and larger, the flow rate of the liquid sprayed from the water spray slit 433 also increases, thereby increasing the cooling effect on the part of the pressure roller 12 in contact with the coated paper. As can be seen from the preceding content, the lower the rotation speed of the pressure roller 12, the higher the temperature of the part of the pressure roller 12 in contact with the coated paper; the higher the rotation speed of the pressure roller 12, the lower the temperature of the part of the pressure roller 12 in contact with the coated paper. The adjustment unit 45 can improve the cooling effect on the part of the pressure roller 12 in contact with the coated paper when the pressure roller 12 is at a low speed, and reduce the cooling effect on the part of the pressure roller 12 in contact with the coated paper when the pressure roller 12 is at a high speed. In this way, the surface temperature of the pressure roller 12 is kept within a relatively reasonable range and the surface temperature uniformity of the pressure roller 12 is maintained as much as possible.

[0033] The first limiting component in this embodiment includes a limiting disk 4531, which is coaxially fixedly installed on the peripheral wall of the connecting column 451. A limiting ring groove 4532 for accommodating the limiting disk 4531 is provided on the groove wall of the connecting groove 4413. The limiting disk 4531 is stuck in the limiting ring groove 4532, so the limiting disk 4531 cannot move axially, thereby limiting the connecting column 451 to only rotate circumferentially within the connecting groove 4413 and preventing axial movement. In this embodiment, the first reset member 454 is a torsion spring, which is coaxially sleeved on the peripheral wall of the connecting column 451. When the pressure roller 12 rotates, the bottom column 4411 also rotates. The driving member 452 is subjected to centrifugal force, which overcomes the circumferential force applied to the connection by the torsion spring, thereby driving the connecting column 451 to rotate. When the pressure roller 12 stops rotating, the bottom column 4411 also stops rotating. The centrifugal force on the driving member 452 disappears, and the torsion spring resets, driving the connecting column 451 to return to the initial state, thereby driving the blade 4412 to return to a state with an angle of 45° with the axis of the bottom column 4411.

[0034] In this embodiment, the driving component 452 includes a driving rod 4521. One end of the driving rod 4521 is located in the placement cavity, and the other end of the driving rod 4521 is slidably inserted into the connecting groove 4413. The driving rod 4521 is provided with a second limiting member for restricting the driving rod 4521 to move only axially. The end of the driving rod 4521 near the connecting rod is provided with a wedge 4522, and the end of the connecting column 451 near the driving rod 4521 is provided with a corresponding inclined groove 4511. When the wedge 4522 on the driving rod 4521 moves axially and inserts into the inclined groove 4511, the wedge 4522 on the driving rod 4521 presses against the groove wall of the inclined groove 4511 on the connecting column 451, thereby causing the connecting column 451 to rotate circumferentially. The end of the driving rod 4521 located in the placement cavity is provided with a second reset member 456 for resetting the driving rod 4521.

[0035] The second limiting member 455 includes a limiting block 4551, which is coaxially fixedly installed at one end of the drive rod 4521 located in the placement cavity. A limiting groove is provided on the groove wall of the connecting groove 4413 near the placement cavity. The limiting block 4551 moves axially within the limiting groove 4552. Due to the setting of the limiting groove 4552, the limiting block 4551 cannot rotate circumferentially within the limiting groove 4552. Therefore, the drive rod 4521 can only move axially within the connecting groove 4413 and cannot rotate circumferentially.

[0036] The second reset component 456 includes a reset spring located in the limiting square groove 4552. The reset spring is coaxially sleeved on the drive rod 4521. One end of the reset spring is fixedly connected to the groove wall of the limiting square groove 4552, and the other end of the reset spring is fixedly connected to the limiting block 4551.

[0037] When the pressure roller 12 rotates, it drives the bottom column 4411 to rotate. The limiting block 4551 inside the cavity of the bottom column 4411 is subjected to centrifugal force. Therefore, the limiting block 4551 moves away from the axis of the bottom column 4411. That is, the limiting block 4551 overcomes the elastic force applied by the return spring and drives the drive rod 4521 to move axially in the direction close to the connecting column 451. The inclined block 4522 on the drive rod 4521 slides into the inclined groove 4511 on the connecting column 451. Since it is an inclined groove 4511, the inclined block 4522 applies a circumferential component force to the groove wall of the inclined groove 4511, and the connecting column 451 cannot move axially. Therefore, the connecting column 451 can only overcome the force of the torsion spring and rotate circumferentially, thereby driving the blade 4412 to rotate. This achieves the effect of the drive member 452 changing the angle between the blade 4412 and the axis of the bottom column 4411.

[0038] It should be noted that, according to pump theory and similarity laws, the pressurization capacity of impeller 441 for the cooling liquid depends on both the rotational speed of impeller 441 and the angle between the blades 4412 and the axis of the base column 4411. With a fixed blade geometry, its pressurization capacity is proportional to the square of the rotational speed, which is a positive gain effect. However, for the variable-pitch impeller 441 in this embodiment, the functional relationship between its axial suction capacity and the angle between the blades 4412 and the pumping efficiency is more important. When the angle is 45°, the axial force exerted by the blades 4412 on the fluid is the largest, resulting in the highest pumping efficiency. When the angle approaches 90°, the blade shape of 4412 is close to a disk perpendicular to the axis, and it mainly produces radial agitation rather than effective axial thrust on the fluid. At this point, the effective lift generated by the blades 4412 decreases sharply, leading to a non-linear, precipitous decline in its axial pumping capacity. During the transition from low to high speed, while the increase in rotational speed brings a positive quadratic gain, the simultaneous exponential decrease in pumping capacity caused by the change in blade angle 4412 from 45° to 90° has a negative effect far exceeding the former. Therefore, the combined effect of these two effects results in a situation where the higher the rotational speed of the pressure roller 12, the lower the actual ability of the impeller 441 to pump coolant into the pressurization chamber 432. Ultimately, this still achieves the adaptive cooling adjustment effect that is inversely proportional to the rotational speed, as preset in this embodiment.

[0039] The implementation principle of the cooling device for a hot press composite machine roller in this embodiment is as follows: During equipment operation, most of the cooling liquid flows out through the equalization holes 431 on the equalization cylinder 43, providing basic overall cooling to the inner wall of the pressure roller 12. Simultaneously, a small portion of the cooling liquid enters the pressurization chamber 432, where it is pressurized by the impeller 441, driven by the meshing of the first drive gear ring 442 and the second drive gear ring 443, and rotates with the pressure roller 12. The pressurized high-pressure liquid is continuously sprayed from the water spray slits 433 directly opposite the concentrated heat load area of ​​the pressure roller 12, providing enhanced cooling to this specific area through forced convection impact. The core of this system lies in the adjusting unit 45, which, through a series of mechanical linkages, precisely converts the passively sensed centrifugal force into changes in the suction capacity of the blades 4412. When rotating at low speed, the drive component 452 (composed of drive rod 4521 and limiting block 4551) located in the placement cavity experiences less centrifugal force and is kept in its original position as much as possible under the action of the second reset component 456 (reset spring). At this time, the first reset component 454 (torsion spring) causes the connecting column 451 to drive the blade 4412 to be as stable as possible at the 45° angle where the axial suction capacity is strongest, thus achieving deep enhanced cooling. When the speed increases, the increased centrifugal force drives the drive rod 4521 to overcome the spring force and move axially. The inclined block 4522 on it then wedges into the inclined groove 4511 of the connecting column 451, converting the linear motion of the drive rod 4521 into the circumferential rotation of the connecting column 451. This causes the blade 4412 to overcome the torsion spring force and deflect its angle towards the 90° direction where the suction capacity is weaker. Ultimately, this achieves intelligent, passive adaptive adjustment where the cooling intensity is inversely proportional to the speed of the pressure roller 12. Example 2

[0040] A cooling method for a hot press laminating machine roller, based on a cooling device for a hot press laminating machine roller in Example 1, includes the following steps: S1: Cooling liquid is injected into the cooling chamber 121 inside a rotating pressure roller 12 to cool the pressure roller 12 as a whole. S2: By utilizing the rotation of the pressure roller 12, a portion of the cooling liquid in the cooling chamber 121 is pressurized, and the pressurized cooling liquid is continuously sprayed onto a specific area on the inner wall of the pressure roller 12 that is in contact with the coated paper, so as to enhance cooling. S3: Based on the change in rotational speed of the pressure roller 12, automatically adjust the pressurization level of a portion of the cooling liquid in step S2. Specifically, when the pressure roller 12 is at a lower rotational speed, a higher degree of pressurization is applied to achieve a highly enhanced cooling effect on the specific area of ​​the inner wall of the pressure roller 12 that is in contact with the coated paper; when the pressure roller 12 is at a higher rotational speed, a lower degree of pressurization is applied to achieve a less enhanced cooling effect on the specific area of ​​the inner wall of the pressure roller 12 that is in contact with the coated paper.

[0041] Obviously, the described embodiments are only a part of the embodiments of the present invention, and not all of them. All other embodiments obtained by those skilled in the art and related fields based on the embodiments of the present invention without inventive effort should fall within the scope of protection of the present invention. Structures, devices, and operating methods not specifically described and explained in the present invention, unless otherwise specified or limited, shall be implemented according to conventional means in the art.

Claims

1. A cooling device for a hot press laminating machine roller, characterized in that, include: The machine body (1) is rotatably equipped with a corrugated roller (11) and a pressure roller (12). Heating component (2); used to increase the surface temperature of the corrugated roll (11); Drive assembly (3); used to drive the corrugated roller (11) and pressure roller (12) to rotate; The cooling component (4) includes a chiller (41) and a rotating connection (42). The pressure roller (12) has a cooling chamber (121) coaxially formed inside. The cooling chamber (121) is connected to the chiller (41) through the rotating connection (42). The chiller (41) is used to inject circulating cooling liquid into the cooling chamber (121).

2. The cooling device for a hot press laminating machine roller according to claim 1, characterized in that: The cooling component (4) also includes a homogenizer: A flow equalization cylinder (43) is coaxially fixed inside the cooling chamber (121). Both ends of the flow equalization cylinder (43) are fixedly connected to and communicate with the rotating connection part (42). A plurality of flow equalization holes (431) are evenly opened on the outer peripheral wall of the flow equalization cylinder (43). The plurality of flow equalization holes (431) make the flow equalization cylinder (43) communicate with the cooling chamber (121). A pressure boosting chamber (432) is provided inside the flow equalization cylinder (43). A water spray slit (433) communicating with the pressure boosting chamber (432) is opened on the surface of the flow equalization cylinder (43). The water spray slit (433) is directly facing the direction of the contact part between the pressure roller (12) and the coating paper. The pressure booster (44) is driven by the rotation of the pressure roller (12) to increase the pressure of the liquid in the pressure booster chamber (432); The adjustment unit (45) can adjust the pressure of the pressurizing component (44) on the liquid in the pressurizing chamber (432) according to the rotation speed of the pressure roller (12), thereby adjusting the cooling component (4) on the cooling part of the pressure roller (12) in contact with the coated paper.

3. The cooling device for a hot press laminating machine roller according to claim 2, characterized in that: The booster (44) includes a first drive gear ring (442) and a second drive gear ring (443). The first drive gear ring (442) is rotatably mounted at the connection between the booster chamber (432) and the rotary connection (42). An impeller (441) is coaxially fixedly mounted inside the first drive gear ring (442). The second drive gear ring (443) is coaxially fixedly mounted on the cavity wall of the cooling chamber (121). The outer teeth of the first drive gear ring (442) mesh with the inner teeth of the second drive gear ring (443).

4. The cooling device for a hot press laminating machine roller according to claim 3, characterized in that: The impeller (441) includes a base column (4411) and multiple blades (4412). The base column (4411) is coaxially fixedly mounted on the first drive gear ring (442). The multiple blades (4412) are rotatably connected to the base column (4411). A placement cavity is provided inside the base column (4411). The adjustment part (45) includes multiple connecting columns (451) and multiple driving components (452). The multiple connecting columns (451) correspond one-to-one with the multiple blades (4412), and the multiple driving components (452) correspond one-to-one with the multiple driving components (452). Multiple connecting grooves (4413) are provided on the peripheral wall of the base column (4411), and the multiple connecting grooves (4413) correspond one-to-one with the multiple connecting columns (451). Correspondingly, one end of the connecting post (451) is fixedly connected to the blade (4412), and the other end of the connecting post (451) extends into the connecting groove (4413). A first limiting member (453) is provided in the connecting groove (4413). The first limiting member (453) is used to restrict the connecting post (451) to rotate circumferentially only in the connecting groove (4413). The driving member (452) is located in the placement cavity. Under the action of centrifugal force, the driving member (452) can drive the connecting post (451) to rotate, thereby changing the angle between the axis of the blade (4412) and the bottom post (4411). A first resetting member (454) for resetting the connecting post (451) is provided on the connecting post (451).

5. The cooling device for a hot press laminating machine roller according to claim 4, characterized in that: The driving component (452) includes a driving rod (4521), one end of which is located in the placement cavity, and the other end of which is slidably inserted into the connecting groove (4413). The driving rod (4521) is provided with a second limiting member for restricting the driving rod (4521) to move only axially. The end of the driving rod (4521) near the connecting rod is provided with a wedge (4522), and the end of the connecting column (451) near the driving rod (4521) is provided with a corresponding inclined groove (4511). When the wedge (4522) on the driving rod (4521) moves axially and inserts into the inclined groove (4511), the connecting column (451) rotates circumferentially. The end of the driving rod (4521) located in the placement cavity is provided with a second resetting member (456) for resetting the driving rod (4521).

6. The cooling device for a hot press laminating machine roller according to claim 4, characterized in that: The first limiting component includes a limiting disk (4531), which is coaxially fixedly installed on the peripheral wall of the connecting column (451). A limiting ring groove (4532) for accommodating the limiting disk (4531) is provided on the groove wall of the connecting groove (4413).

7. The cooling device for a hot press laminating machine roller according to claim 4, characterized in that: The first reset component (454) is a torsion spring, which is coaxially sleeved on the peripheral wall of the connecting column (451).

8. A cooling device for a hot press laminating machine roller according to claim 5, characterized in that: The second reset component (456) includes a reset spring located in a limiting square groove (4552). The reset spring is coaxially sleeved on the drive rod (4521). One end of the reset spring is fixedly connected to the groove wall of the limiting square groove (4552), and the other end of the reset spring is fixedly connected to the limiting block (4551).

9. A cooling device for a hot press laminating machine roller according to claim 8, characterized in that: The second reset component (456) includes a reset spring located in the limiting square groove (4552). The reset spring is coaxially sleeved on the drive rod (4521). One end of the reset spring abuts against the wall of the placement groove, and the other end of the reset spring abuts against the limiting block (4551).

10. A cooling method for a hot press laminating machine roller, based on the cooling device for a hot press laminating machine roller according to any one of claims 1-9, characterized in that, Includes the following steps: S1: Inject cooling liquid into the cooling chamber (121) inside a rotating pressure roller (12) to cool the pressure roller (12) as a whole; S2: By utilizing the rotation of the pressure roller (12), a portion of the cooling liquid in the cooling chamber (121) is pressurized, and the pressurized cooling liquid is continuously sprayed onto a specific area on the inner wall of the pressure roller (12) that is in contact with the coated paper, so as to enhance cooling. S3: Based on the change in rotational speed of the pressure roller (12), automatically adjust the degree of pressurization of a portion of the cooling liquid in step S2, wherein a higher degree of pressurization is performed when the pressure roller (12) is at a lower rotational speed, and a lower degree of pressurization is performed when the pressure roller (12) is at a higher rotational speed.

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