A hot calender for nonwoven fabric production

Abstract

The present application relates to hot rolling mill technical field, especially for a kind of hot rolling mill for nonwoven production, including two racks, fixed to the surface of rack, and the bottom frame of the side panel fixed in top, upper hot rolling roller and lower hot rolling roller installed in the inner surface of rack and the circulating equipment installed in the outer surface of rack, further include: install in the inner surface of side panel, and including guiding component and feeding roller's material guiding mechanism;The present application can be collected by setting electrostatic adsorption roller to the debris on the surface of lower hot rolling roller, in addition, the surface of electrostatic adsorption roller can be cleaned by the present hot rolling mill, while the flatness of the surface of lower hot rolling roller can be detected, and the present hot rolling mill can also be pretreated to nonwoven, solve the problem that the surface pit of hot rolling roller is not easy to find when using part of hot rolling mill at present, and the surface pit of hot rolling roller and the fiber debris remaining after long-term use will all affect the production effect of nonwoven.

Description

Technical Field

[0001] This invention relates to the field of hot rolling mill technology, specifically a hot rolling mill for nonwoven fabric production. Background Technology

[0002] Nonwoven fabric is a type of fabric that does not require spinning or weaving. Instead, it is made by arranging short or long textile fibers in a directional or random manner to form a web structure, which is then reinforced by mechanical, thermal bonding, or chemical methods. The hot rolling mill is an important piece of equipment in the nonwoven fabric manufacturing process.

[0003] When a hot rolling mill is in use, the hot rolling rolls are in direct contact with the surface of the fabric. Heat-conducting oil circulates inside the hot rolling rolls, transferring heat to the roll surface. The uniform surface temperature of the hot rolling rolls softens and compacts the fibers of the fabric. During this process, the smoothness of the hot rolling roll surface directly affects the production effect of the nonwoven fabric. If there are pits on the hot rolling roll surface, the fibers in the fabric cannot adhere to the roll surface when passing through the pits. Therefore, the heat received by the fibers in the nonwoven fabric relative to the pits will be reduced, affecting the softening and compaction of the fibers. Furthermore, when the nonwoven fabric surface contacts the hot rolling roll surface, some shorter fiber fragments easily remain on the roll surface. Over time, these residual short fibers will affect the smoothness of the roll surface, thus affecting the subsequent bonding effect between the nonwoven fabric and the roll surface, ultimately impacting the overall nonwoven fabric production effect.

[0004] Currently, some hot rolling mills make it difficult to judge the flatness of the hot rolling rolls during the processing. When nonwoven fabrics have quality problems caused by the flatness of the hot rolling rolls after production, a large amount of material loss is difficult to recover. Therefore, it is necessary to improve the way the flatness of the hot rolling rolls is detected, and further reduce the possibility of shorter fibers adhering to the surface of the hot rolling rolls. Summary of the Invention

[0005] The purpose of this invention is to provide a hot rolling mill for nonwoven fabric production. An electrostatic adsorption roller can adsorb and collect debris from the surface of the lower hot rolling roll. Furthermore, this hot rolling mill not only cleans debris from the surface of the electrostatic adsorption roller, but also, in conjunction with a ranging probe and an infrared rangefinder, can detect the flatness of the lower hot rolling roll surface. Additionally, this hot rolling mill can pre-treat the nonwoven fabric to reduce the impact of shorter fibers on subsequent operations. This solves the problem that in some current hot rolling mills, pits on the hot rolling roll surface are difficult to detect, and these pits, along with residual fiber debris after long-term use, both affect the production effect of nonwoven fabrics.

[0006] To achieve the above objectives, the present invention provides the following technical solution: a hot rolling mill for nonwoven fabric production, comprising two frames, a base frame fixed to the surface of the frames and having side panels fixed to its top, an upper hot rolling roll and a lower hot rolling roll installed on the inner surface of the frames, and a circulation device installed on the outer surface of the frames, further comprising:

[0007] A material guiding mechanism, including a guide assembly and a feeding roller, is installed on the inner surface of the side panel. An upper oil discharge pipe and a lower oil discharge pipe, respectively connected to the upper hot rolling roll and the lower hot rolling roll, are fixedly passed through the surface of one side frame. The upper hot rolling roll and the lower hot rolling roll are connected to an upper oil pipe that is fixedly passed through the other side frame. A sealing box is fixedly installed on the top of one side circulation equipment. An oil inlet pipe is connected to the bottom of the sealing box. The upper oil discharge pipe is fixedly passed through the top of the sealing box. The oil inlet pipe and the lower oil discharge pipe are both connected to one side circulation equipment. The upper oil pipe is connected to the other side circulation equipment.

[0008] A rectangular frame and a collection box are fixed to the inner surface of the frame. An electrostatic adsorption roller is rotatably connected to the inner surface of the frame via a bearing sleeve. An infrared rangefinder is installed on the inner surface of the frame. The inner surface of the frame has a preheating mechanism, which includes a heat-conducting frame and a bonding component. A limiting groove is formed on the surface of the rectangular frame. A rectangular block is slidably connected inside the rectangular frame. A cleaning mechanism and a moving mechanism are respectively installed at the bottom and top of the rectangular block. A ranging probe is fixed to the surface of the moving mechanism. The ranging probe is electrically connected to the infrared rangefinder.

[0009] Preferably, the guiding assembly includes a first guide roller, a second guide roller, and a third guide roller, with the two ends of the first guide roller, the second guide roller, and the third guide roller respectively rotatably penetrating through the two side panels.

[0010] Preferably, the height of the third guide roller is higher than the height of the first guide roller and the second guide roller, and the height of the second guide roller is lower than the height of the lower hot rolling roller.

[0011] Preferably, the surface of the sealed box is equipped with an adjustment mechanism, which includes a rotating component, a connecting component, a bevel gear ring, a pushing component, and a second gear disk. One end of the pushing component has a turntable that rotates, and the turntable is fixed to the surface of the rectangular block. The rotating component includes a rotating rod that rotates with one end of the inner wall of the sealed box, a blade fixed to the surface of the rotating rod, and a bevel gear fixed to the other end of the rotating rod.

[0012] Preferably, the connecting assembly includes an L-shaped plate with one end fixed to the surface of the sealing box, a connecting rod with one end rotatable to the surface of the L-shaped plate, and a first gear disk fixedly sleeved on the surface of the connecting rod. The other end of the L-shaped plate is fixed to the surface of the other side of the frame. A bevel gear ring is fixedly sleeved on the surface of the connecting rod. The second gear disk meshes with the first gear disk. A short shaft is fixed to one end of the connecting rod. The pushing assembly includes a short plate with one end fixedly sleeved on the surface of the short shaft, a long shaft fixed to the surface of the second gear disk, and a long plate with one end fixedly sleeved on the surface of the long shaft. The other end of the short plate is rotatably sleeved on the surface of the long shaft, and the other end of the long plate rotates with the surface of the turntable.

[0013] Preferably, the cleaning mechanism includes a lower limit plate and a cleaning plate fixed to one end of the lower limit plate. The surface of the cleaning plate is in contact with the surface of the electrostatic adsorption roller, and the surface of the lower limit plate is slidably connected to the inner wall of the limiting groove.

[0014] Preferably, the moving mechanism includes an upper limit plate fixed to the top of the rectangular block, a moving block fixed to the top of the upper limit plate, and a horizontal axis fixed to the inner surface of the frame. The horizontal axis slides through the moving block, and the ranging probe is fixed to the surface of the moving block.

[0015] Preferably, the preheating mechanism further includes a first heat-conducting component and a second heat-conducting component. The first heat-conducting component includes a contact heat-absorbing plate fixed to the inner surface of the frame, an irregularly shaped heat-conducting plate fixed to the top of the contact heat-absorbing plate, and a trapezoidal heat-conducting plate fixed to the surface of the irregularly shaped heat-conducting plate. The bottom of the contact heat-absorbing plate is in contact with the surface of the lower hot rolling roll, and the heat-conducting frame is fixed to the surface of the trapezoidal heat-conducting plate.

[0016] Preferably, the second heat-conducting component includes a vertical heat-absorbing plate fixedly extending through the top of the upper oil drain pipe and a heat-conducting rod fixed to the surface of the vertical heat-absorbing plate.

[0017] Preferably, the bonding assembly includes a sliding rod that slides through the heat-conducting frame, a disc and an arc-shaped plate fixed to both ends of the sliding rod, and a compression spring fixed to the surface of the disc. The heat-conducting frame has a cavity inside, the surface of the disc is slidably connected to the inner wall of the cavity, the compression spring is disposed inside the cavity, and an insulation board is fixed to the surface of the arc-shaped plate.

[0018] Compared with the prior art, the beneficial effects of the present invention are as follows:

[0019] In use, this invention utilizes an electrostatic adsorption roller to collect debris from the surface of the lower hot rolling roll, reducing the impact of short fiber debris on the surface flatness of the hot rolling roll. Furthermore, the hot rolling mill, through the reciprocating movement of a rectangular block, drives the cleaning and moving mechanisms to reciprocate, not only cleaning debris from the electrostatic adsorption roller surface but also using a ranging probe in conjunction with an infrared rangefinder to detect the flatness of the lower hot rolling roll surface, thus reducing subsequent material waste. Additionally, this hot rolling mill can pre-treat nonwoven fabrics, further reducing the impact of short fibers on subsequent operations. This solves the problem that in some current hot rolling mills, surface pits on the hot rolling rolls are difficult to detect, and these pits, along with residual fiber debris after long-term use, both affect the production effect of nonwoven fabrics. Attached Figure Description

[0020] Figure 1 This is a three-dimensional structural diagram of the present invention;

[0021] Figure 2 This is a schematic diagram of the three-dimensional structure after partial dismantling of the present invention;

[0022] Figure 3 This is a three-dimensional structural diagram of the present invention after the upper oil drain pipe and the upper oil pipe have been cut open;

[0023] Figure 4 This is a three-dimensional structural diagram of the present invention after the upper oil drain pipe and the sealing box have been cut open;

[0024] Figure 5 This is a partial three-dimensional structural diagram of the present invention;

[0025] Figure 6 This is a three-dimensional structural diagram of the adjustment mechanism, rectangular frame, electrostatic adsorption roller, and moving mechanism in this invention;

[0026] Figure 7 This is a three-dimensional structural diagram of the adjustment mechanism, rectangular block, cleaning mechanism, and moving mechanism in this invention;

[0027] Figure 8 This is a three-dimensional structural diagram of the lower hot rolling roll, upper oil pipe, electrostatic adsorption roll, and cleaning mechanism in this invention;

[0028] Figure 9 This is a three-dimensional structural diagram of the preheating mechanism and guiding assembly in this invention;

[0029] Figure 10 This is a three-dimensional structural diagram of the first heat-conducting component, the second heat-conducting component, the heat-conducting frame, and the bonding component in this invention;

[0030] Figure 11 This is a three-dimensional structural diagram of the heat-conducting frame after it has been cut open according to the present invention.

[0031] In the diagram: 1. Frame; 2. Base frame; 3. Side panel; 4. Upper hot rolling roll; 5. Lower hot rolling roll; 6. Circulation equipment; 7. Material guiding mechanism; 71. Guiding assembly; 711. First guide roll; 712. Second guide roll; 713. Third guide roll; 72. Feeding roll; 8. Upper oil drain pipe; 9. Lower oil drain pipe; 10. Upper oil pipe; 11. Sealing box; 12. Oil inlet pipe; 13. Adjusting mechanism; 131. Rotating assembly; 1311. Rotating rod; 1312. Blade; 1313. Bevel gear; 132. Connecting assembly; 1321. L-shaped plate; 1322. Connecting rod; 1323. First gear disc; 133. Bevel gear ring; 134. Pushing assembly; 1341. Short plate; 1342. Long shaft; 1343. Long plate; 135. Second gear disc; 14. 15. Turntable; 16. Short shaft; 17. Limiting groove; 18. Rectangular block; 19. Rectangular frame; 10. Cleaning mechanism; 191. Lower limit plate; 192. Cleaning plate; 20. Electrostatic adsorption roller; 21. Moving mechanism; 211. Upper limit plate; 212. Moving block; 213. Horizontal axis; 22. Distance measuring probe; 23. Infrared rangefinder; 24. Preheating mechanism; 241. First heat conduction component; 2411. Contact heat absorption plate; 2412. Irregularly shaped heat conduction plate; 2413. Trapezoidal heat conduction plate; 242. Second heat conduction component; 2421. Vertical heat absorption plate; 2422. Heat conduction rod; 243. Heat conduction frame; 244. Adhesion component; 2441. Slide rod; 2442. Disc; 2443. Compression spring; 2444. Arc plate; 25. Insulation plate; 26. Collection box. Detailed Implementation

[0032] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0033] Please see Figure 1-11A hot rolling mill for nonwoven fabric production includes two frames 1, a base frame 2 fixed to the surface of the frames 1 and with side panels 3 fixed to the top, an upper hot rolling roll 4 and a lower hot rolling roll 5 installed on the inner surface of the frames 1, and a circulation device 6 installed on the outer surface of the frames 1. A material guiding mechanism 7 is installed on the inner surface of the side panels 3, the material guiding mechanism 7 including a guide assembly 71 installed on the inner surface of the side panels 3 and a feeding roll 72 installed on the top of the side panels 3. An upper oil drain pipe 8 and a lower oil drain pipe 9 are fixedly passed through the surface of one side of the frames 1. One end of the upper oil drain pipe 8 and the lower oil drain pipe 9 are respectively connected to one end of the upper hot rolling roll 4 and the lower hot rolling roll 5. The other end of the upper hot rolling roll 4 and the lower hot rolling roll 5 are connected to an upper oil pipe 10. The upper oil pipe 10 is fixedly passed through the surface of the other side of the frames 1. A sealing box 11 is fixed to the top of the circulating device 6. The other end of the upper oil pipe 8 is fixedly inserted through the top of the sealing box 11. The bottom of the sealing box 11 is connected to an oil inlet pipe 12. One end of the oil inlet pipe 12 and the other end of the lower oil pipe 9 are both connected to the top of one side of the circulating device 6. One end of the upper oil pipe 10 is connected to the top of the other side of the circulating device 6. The two circulating devices 6 are connected by an oil passage pipe. The heat transfer oil that has been used can be input from one side of the circulating device 6 to the other side of the circulating device 6 through the oil passage pipe, and then injected into the upper oil pipe 10 from the other side of the circulating device 6. The circulating device 6 is equipped with a mechanism that can regulate the temperature of the heat transfer oil. This is a mature existing technology and will not be described in detail here. An adjustment mechanism 13 is installed on the surface of the sealing box 11. Mechanism 13 includes a rotating assembly 131, a connecting assembly 132, a bevel gear ring 133, a pushing assembly 134, and a second gear disk 135. A turntable 14 rotates at one end of the pushing assembly 134. A rectangular frame 18 is fixed to the inner surface of the frame 1. A rectangular block 17 is slidably connected inside the rectangular frame 18. The turntable 14 is fixed to the surface of the rectangular block 17. Limit grooves 16 are provided at the top and bottom of the rectangular frame 18. A cleaning mechanism 19 is installed at the bottom of the rectangular block 17. A moving mechanism 21 is installed at the top of the rectangular block 17. A ranging probe 22 is fixed to the surface of the moving mechanism 21. An infrared rangefinder 23 is installed on the inner surface of one side of the frame 1. The ranging probe 22 is electrically connected to the infrared rangefinder 23. A preheating mechanism 24 is installed on the inner surface of the frame 1. The preheating mechanism 24 includes a first heat-conducting component 241, a second heat-conducting component 242, a heat-conducting frame 243, and a bonding component 244. A rotating electrostatic adsorption roller 20 is rotatably connected to the inner surface of the frame 1 via a bearing sleeve. A collection box 26 is fixed to the inner surface of the frame 1. The surface of the electrostatic adsorption roller 20 is in contact with the surface of the lower hot rolling roller 5. The electrostatic adsorption roller 20 can clean shorter fiber debris from the surface of the lower hot rolling roller 5, reducing the impact of shorter fibers on the flatness of the lower hot rolling roller 5 surface. The heat-conducting frame 243 and the bonding component 244 work together to pre-treat the nonwoven fabric before it passes through the upper hot rolling roller 4 and the lower hot rolling roller 5, facilitating the melting of shorter fibers during preheating and their bonding with the remaining fibers.To further reduce the possibility of shorter fibers remaining on the surface of the lower hot rolling roll 5, the ranging probe 22 works in conjunction with the infrared rangefinder 23 to detect the surface flatness of the lower hot rolling roll 5.

[0034] Because the nonwoven fabric is formed by high temperature and extrusion when passing through the upper hot roller 4 and the lower hot roller 5, and the nonwoven fabric first comes into contact with the surface of the lower hot roller 5, the flatness of the surface of the lower hot roller 5 can easily affect the hot rolling effect. It should be noted that the extrusion pressure on the nonwoven fabric during the preheating process is much less than the extrusion pressure between the upper hot roller 4 and the lower hot roller 5. The pretreatment is mainly to treat the shorter fibers by preheating.

[0035] The guiding assembly 71 includes a first guide roller 711, a second guide roller 712, and a third guide roller 713. The two ends of the first guide roller 711, the second guide roller 712, and the third guide roller 713 respectively rotatably pass through the two side panels 3. The height of the third guide roller 713 is higher than the height of the first guide roller 711 and the second guide roller 712, and the height of the second guide roller 712 is lower than the height of the lower hot rolling roller 5. Accordingly, when the worker puts the fabric on the surface of the upper roller 72, one end of the fabric can pass through the bottom of the first guide roller 711 and then through the top of the third guide roller 713, and another end of the fabric can pass through the bottom of the second guide roller 712 and then through the gap between the upper hot rolling roller 4 and the lower hot rolling roller 5, so that the fabric can be heated by the upper hot rolling roller 4 and the lower hot rolling roller 5.

[0036] The rotating assembly 131 includes a rotating rod 1311, blades 1312, and a bevel gear 1313. One end of the rotating rod 1311 rotates through the sealing box 11 and rotates with the inner wall of the sealing box 11. There are several blades 1312, which are fixed to the surface of the rotating rod 1311. The bevel gear 1313 is fixed to the other end of the rotating rod 1311. The other end of the upper oil pipe 8 is located on one side of the top of the rotating rod 1311. When heat transfer oil is injected into the interior of the sealing box 11 through the upper oil pipe 8, the blades 1312 can rotate due to the flow of heat transfer oil. At this time, the rotating rod 1311 can drive the bevel gear 1313 to rotate. At the same time, the heat transfer oil can be injected into the interior of the circulation equipment 6 through the oil inlet pipe 12 for subsequent circulation. The treated heat transfer oil can be re-injected into the interior of the upper hot roll 4 and the lower hot roll 5 through the upper oil pipe 10.

[0037] The connecting assembly 132 includes an L-shaped plate 1321, a connecting rod 1322, and a first gear disk 1323. One end of the L-shaped plate 1321 is fixed to the surface of the sealing box 11, and the other end of the L-shaped plate 1321 is fixed to the surface of the other side of the frame 1. One end of the connecting rod 1322 rotates with the surface of the L-shaped plate 1321. The first gear disk 1323 is fixedly sleeved on the surface of the connecting rod 1322. A bevel gear ring 133 is fixedly sleeved on the surface of the connecting rod 1322. The bevel gear ring 133 meshes with the bevel gear 1313. When the blade 1312 rotates with the rotation assembly 131, the bevel gear ring 133 drives the connecting rod 1322 to rotate, which in turn drives the first gear disk 1323 to rotate. The second gear disk 135 meshes with the first gear disk 1323, and thus the second gear disk 135 can rotate accordingly. A short shaft 15 is fixed to one end of the connecting rod 1322.

[0038] The pushing assembly 134 includes a short plate 1341, a long shaft 1342, and a long plate 1343. One end of the short plate 1341 is fixedly sleeved on the surface of the short shaft 15, and the other end of the short plate 1341 is rotatably sleeved on the surface of the long shaft 1342. One end of the long shaft 1342 is fixed to the surface of the second gear disk 135, and one end of the long plate 1343 is fixedly sleeved on the surface of the long shaft 1342. The other end of the long plate 1343 rotates with the surface of the turntable 14. When the connecting rod 1322 rotates, the first gear disk 1323 and the short shaft 15 rotate accordingly. At this time, the second gear disk 135 and the first gear disk 1323 work together to increase the smoothness of the short plate 1341 and the long plate 1343 during rotation. The short plate 1341 rotates accordingly, and the long plate 1343 rotates accordingly, which can push the rectangular block 17.

[0039] The cleaning mechanism 19 includes a lower limit plate 191 and a cleaning plate 192. The lower limit plate 191 is fixed to the bottom of the rectangular block 17, and the cleaning plate 192 is fixed to one end of the lower limit plate 191. The surface of the cleaning plate 192 is in contact with the surface of the electrostatic adsorption roller 20. After the cleaning plate 192 scrapes off the debris from the surface of the electrostatic adsorption roller 20, the debris can fall into the inside of the collection box 26. The surface of the lower limit plate 191 is slidably connected to the inner wall of the lower limiting groove 16. The use of the limiting groove 16 and the lower limit plate 191 together can increase the stability of the cleaning plate 192 when it moves.

[0040] The moving mechanism 21 includes an upper limit plate 211, a moving block 212, and a horizontal axis 213. The upper limit plate 211 is fixed to the top of the rectangular block 17, and the moving block 212 is fixed to the top of the upper limit plate 211. The two ends of the horizontal axis 213 are respectively fixed to the inner surfaces of the two frames 1. The horizontal axis 213 slides through the moving block 212. The ranging probe 22 is fixed to the surface of the moving block 212. When the rectangular block 17 moves, the upper limit plate 211 drives the moving block 212 to move. At this time, the horizontal axis 213 can guide the movement of the moving block 212 and support it. Accordingly, the ranging probe 22 can detect the flatness of the surface of the lower hot rolling roll 5 as the moving block 212 moves. That is, when a pit appears on the surface of the lower hot rolling roll 5, the distance measured by the ranging probe 22 will increase. The operator can observe the measured data according to the infrared rangefinder 23.

[0041] The first heat-conducting component 241 includes a contact heat-absorbing plate 2411, a shaped heat-conducting plate 2412, and a trapezoidal heat-conducting plate 2413. The surfaces on both sides of the contact heat-absorbing plate 2411 are fixed to the inner surfaces of the two frames 1 respectively. The bottom of the contact heat-absorbing plate 2411 is in contact with the surface of the lower hot roll 5. The shaped heat-conducting plate 2412 is fixed to the top of the contact heat-absorbing plate 2411. One side of the trapezoidal heat-conducting plate 2413 is fixed to the surface of the shaped heat-conducting plate 2412. The heat-conducting frame 243 is fixed to the other side of the trapezoidal heat-conducting plate 2413. When the contact heat-absorbing plate 2411 contacts the lower hot roll 5, it can absorb the heat that is easily dissipated into the air from the surface of the lower hot roll 5 and conduct it to the trapezoidal heat-conducting plate 2413 through the shaped heat-conducting plate 2412, so that it can be transmitted to the interior of the heat-conducting frame 243 through the trapezoidal heat-conducting plate 2413.

[0042] The second heat-conducting assembly 242 includes a vertical heat-absorbing plate 2421 and a heat-conducting rod 2422. The vertical heat-absorbing plate 2421 is fixedly inserted through the top of the upper oil drain pipe 8. One end of the heat-conducting rod 2422 is fixed to the surface of the vertical heat-absorbing plate 2421. The surface of the heat-conducting rod 2422 is in contact with the surface of the irregular heat-conducting plate 2412. Thus, the heat inside the used heat-conducting oil can be absorbed by the vertical heat-absorbing plate 2421 and transferred to the surface of the irregular heat-conducting plate 2412 through the heat-conducting rod 2422 for subsequent use.

[0043] The bonding assembly 244 includes a slide rod 2441, a disc 2442, a compression spring 2443, and an arc-shaped plate 2444. A cavity is formed inside the heat-conducting frame 243. The slide rod 2441 slides through the heat-conducting frame 243. The disc 2442 and the arc-shaped plate 2444 are fixed to the two ends of the slide rod 2441, respectively. The surface of the disc 2442 is slidably connected to the inner wall of the cavity. The compression spring 2443 is disposed inside the cavity, with its two ends fixed to the inner wall of the cavity and the surface of the disc 2442, respectively. The slide rod 2441 guides the movement of the arc-shaped plate 2444. The disc 2442 and the compression spring 2443 work together to push the slide rod 2441 and the arc-shaped plate 2444, allowing the surface of the arc-shaped plate 2444 to better adhere to the heat-conducting frame. The surface of the fabric through which the third guide roller 713 passes is in contact with the surface of the fabric, thereby improving the flexibility of the bonding assembly 244 during use. That is, the bonding assembly 244 can be applied to fabrics of different thicknesses, thus facilitating better pretreatment of shorter fibers on the surface of the nonwoven fabric. This reduces the problem of shorter fibers easily remaining on the surface of the lower hot roller 5 and affecting the flatness of the lower hot roller 5. Insulation plates 25 are fixed above and below the surface of the arc plate 2444. The surface of the insulation plate 25 is in contact with the surface of the heat-conducting frame 243, thereby guiding the movement of the arc plate 2444 and reducing heat loss. The main reason for treating the flatness of the lower hot roller 5 is that the nonwoven fabric first contacts the lower hot roller 5 for heating, and it has been found during use that the fiber debris remaining on the lower hot roller 5 is significantly more than that on the upper hot roller 4.

[0044] It should be noted that the first heat-conducting component 241 and the second heat-conducting component 242 can provide heat support for the heat-conducting frame 243 and the bonding component 244 while recovering some of the easily dissipated heat. In addition, other external heating equipment can be used to provide preheating heat to the heat-conducting frame 243 and the bonding component 244.

[0045] Working Principle: During operation, the circulating equipment 6, upper oil drain pipe 8, lower oil drain pipe 9, and upper oil pipe 10 work together to circulate heat transfer oil into the upper and lower hot rolling rolls 4 and 5, allowing the nonwoven fabric to be heated. Simultaneously, the electrostatic adsorption roller 20 contacts the surface of the lower hot rolling roll 5, adsorbing and cleaning debris from its surface. During this process, the heat transfer oil used inside the upper hot rolling roll 4 flows through the upper oil drain pipe 8 into the sealed box 11. This allows the pushing component 134 to move the rectangular block 17, causing it to reciprocate within the rectangular frame 18. This reciprocating movement of the rectangular block 17 adjusts the movement of the cleaning mechanism 19 and the moving block 212. As the cleaning mechanism 19 moves with the rectangular block 17, the cleaning plate 192 cleans debris from the surface of the electrostatic adsorption roller 20. To reduce the problem of debris adhering to the surface of the lower hot roller 5 and affecting subsequent nonwoven fabric processing, the cleaned debris falls into the collection box 26. The distance measuring probe 22 moves with the moving mechanism 21 to detect the flatness of the surface of the lower hot roller 5, so as to ensure the effect of processing the nonwoven fabric. In addition, during the processing, the first heat-conducting component 241 and the second heat-conducting component 242 work together to absorb some of the heat emitted to the outside and conduct the heat through the heat-conducting frame 243 to the preheating mechanism 24, so as to preheat the nonwoven fabric through the bonding component 244. In actual use, heat can also be transferred to the preheating mechanism 24 through the cooperation of external heating equipment and heat-conducting frame 243. By preheating the shorter fibers on the surface of the nonwoven fabric, it is easier for the shorter fibers on the surface of the nonwoven fabric to initially connect with the other fibers, thereby reducing the problem of shorter fibers remaining on the surface of the lower hot roller 5.

[0046] It should be noted that, in this document, relational terms such as "first" and "second" are used merely to distinguish one entity or operation from another, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Furthermore, the terms "comprising," "including," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such a process, method, article, or apparatus. Without further limitations, an element defined by the phrase "comprising one..." does not exclude the presence of other identical elements in the process, method, article, or apparatus that includes the element.

[0047] Although embodiments of the invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. A hot rolling mill for nonwoven fabric production, comprising two frames (1), a base frame (2) fixed to the surface of the frames (1) and having a side panel (3) fixed to the top, an upper hot rolling roll (4) and a lower hot rolling roll (5) installed on the inner surface of the frames (1), and a circulation device (6) installed on the outer surface of the frames (1), characterized in that, Also includes: The material guiding mechanism (7) is installed on the inner surface of the side panel (3) and includes a guide assembly (71) and a feeding roller (72). An upper oil pipe (8) and a lower oil pipe (9) are fixedly passed through the surface of one side frame (1) and are respectively connected to the upper hot rolling roller (4) and the lower hot rolling roller (5). The upper hot rolling roller (4) and the lower hot rolling roller (5) are connected to an upper oil pipe (10) that is fixedly passed through the other side frame (1). A sealing box (11) is fixedly installed on the top of one side circulation device (6). An oil inlet pipe (12) is connected to the bottom of the sealing box (11). The upper oil pipe (8) is fixedly passed through the top of the sealing box (11). The oil inlet pipe (12) and the lower oil pipe (9) are both connected to one side circulation device (6). The upper oil pipe (10) is connected to the other side circulation device (6). The inner surface of the frame (1) is fixed with a rectangular frame (18) and a collection box (26). The inner surface of the frame (1) is rotatably connected with an electrostatic adsorption roller (20) through a bearing sleeve. An infrared rangefinder (23) is installed on the inner surface of the frame (1). A preheating mechanism (24) is installed on the inner surface of the frame (1). The preheating mechanism (24) includes a heat-conducting frame (243) and a bonding component (244). A limiting groove (16) is opened on the surface of the rectangular frame (18). A rectangular block (17) is slidably connected inside the rectangular frame (18). A cleaning mechanism (19) and a moving mechanism (21) are respectively installed at the bottom and top of the rectangular block (17). A ranging probe (22) is fixed on the surface of the moving mechanism (21). The ranging probe (22) is electrically connected to the infrared rangefinder (23).

2. The hot rolling mill for nonwoven fabric production according to claim 1, characterized in that: The guide assembly (71) includes a first guide roller (711), a second guide roller (712) and a third guide roller (713), with the two ends of the first guide roller (711), the second guide roller (712) and the third guide roller (713) respectively rotatably passing through the two side panels (3).

3. A hot rolling mill for nonwoven fabric production according to claim 2, characterized in that: The height of the third guide roller (713) is higher than the height of the first guide roller (711) and the second guide roller (712), and the height of the second guide roller (712) is lower than the height of the lower hot rolling roller (5).

4. A hot rolling mill for nonwoven fabric production according to claim 1, characterized in that: An adjustment mechanism (13) is installed on the surface of the sealing box (11). The adjustment mechanism (13) includes a rotating component (131), a connecting component (132), a bevel gear ring (133), a pushing component (134), and a second gear disk (135). One end of the pushing component (134) has a turntable (14) that rotates. The turntable (14) is fixed to the surface of the rectangular block (17). The rotating component (131) includes a rotating rod (1311) that rotates with one end of the inner wall of the sealing box (11), a blade (1312) fixed to the surface of the rotating rod (1311), and a bevel gear (1313) fixed to the other end of the rotating rod (1311).

5. A hot rolling mill for nonwoven fabric production according to claim 4, characterized in that: The connecting assembly (132) includes an L-shaped plate (1321) with one end fixed to the surface of the sealing box (11), a connecting rod (1322) with one end rotatable to the surface of the L-shaped plate (1321), and a first gear disk (1323) fixedly sleeved on the surface of the connecting rod (1322). The other end of the L-shaped plate (1321) is fixed to the surface of the other side of the frame (1). A bevel gear ring (133) is fixedly sleeved on the surface of the connecting rod (1322). The second gear disk (135) and the first gear disk (1323) are connected. The connecting rod (1322) is meshed with a short shaft (15) fixed at one end. The pushing assembly (134) includes a short plate (1341) fixedly sleeved on the surface of the short shaft (15) at one end, a long shaft (1342) fixed to the surface of the second gear disk (135), and a long plate (1343) fixedly sleeved on the surface of the long shaft (1342) at one end. The other end of the short plate (1341) is rotatably sleeved on the surface of the long shaft (1342), and the other end of the long plate (1343) rotates with the surface of the turntable (14).

6. A hot rolling mill for nonwoven fabric production according to claim 1, characterized in that: The cleaning mechanism (19) includes a lower limit plate (191) and a cleaning plate (192) fixed to one end of the lower limit plate (191). The surface of the cleaning plate (192) is in contact with the surface of the electrostatic adsorption roller (20), and the surface of the lower limit plate (191) is slidably connected to the inner wall of the limiting groove (16).

7. A hot rolling mill for nonwoven fabric production according to claim 1, characterized in that: The moving mechanism (21) includes an upper limit plate (211) fixed to the top of the rectangular block (17), a moving block (212) fixed to the top of the upper limit plate (211), and a horizontal axis (213) fixed to the inner surface of the frame (1). The horizontal axis (213) slides through the moving block (212), and the ranging probe (22) is fixed to the surface of the moving block (212).

8. A hot rolling mill for nonwoven fabric production according to claim 1, characterized in that: The preheating mechanism (24) further includes a first heat-conducting component (241) and a second heat-conducting component (242). The first heat-conducting component (241) includes a contact heat-absorbing plate (2411) fixed to the inner surface of the frame (1), an irregular heat-conducting plate (2412) fixed to the top of the contact heat-absorbing plate (2411), and a trapezoidal heat-conducting plate (2413) fixed to the surface of the irregular heat-conducting plate (2412). The bottom of the contact heat-absorbing plate (2411) is in contact with the surface of the lower hot rolling roll (5), and the heat-conducting frame (243) is fixed to the surface of the trapezoidal heat-conducting plate (2413).

9. A hot rolling mill for nonwoven fabric production according to claim 8, characterized in that: The second heat-conducting component (242) includes a vertical heat-absorbing plate (2421) fixed through the top of the upper oil drain pipe (8) and a heat-conducting rod (2422) fixed to the surface of the vertical heat-absorbing plate (2421).

10. A hot rolling mill for nonwoven fabric production according to claim 8, characterized in that: The bonding assembly (244) includes a sliding rod (2441) that slides through the heat-conducting frame (243), a disc (2442) and an arc plate (2444) that are fixed to both ends of the sliding rod (2441), and a compression spring (2443) that is fixed to the surface of the disc (2442). The heat-conducting frame (243) has a cavity inside. The surface of the disc (2442) is slidably connected to the inner wall of the cavity. The compression spring (2443) is located inside the cavity. An insulation plate (25) is fixed to the surface of the arc plate (2444).

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