A calender roll cleaning mechanism and sheeting line thereof

Abstract

The application provides a calender roll cleaning mechanism and a sheet production line thereof, which comprises a movable roll table moving linearly along a ground-laid guide rail, a roll table frame fixedly arranged on the movable roll table, a lifting mechanism box slidingly arranged on the lifting guide rails at both sides, a cleaning connecting rod telescopically arranged on the lifting mechanism box, and a positioning roll sleeve. When the surface of the calender roll is bright, clean and free of pits and protrusions, or when the surface of the calender roll is attached with stains or uneven, the angle of the calender roll when the laser beam cannot be normally received by the positioning roll sleeve is calibrated. The application can effectively clean the surface of the calender roll, detect the cleaning condition of the roll surface, realize the automation of roll surface cleaning, clean the roll surface, detect the cleaning degree and flatness of the roll surface, further position the pits and protrusions, facilitate quick positioning and searching, and thus ensure the uniformity of the produced sheet.

Description

Technical Field

[0001] This invention relates to the field of calendering roll technology, specifically to a calendering roll cleaning mechanism and its sheet production line. Background Technology

[0002] Sheet production lines are used to produce wide, continuous polymer sheets. The thickness and surface quality of these sheets are closely related to the calendering mechanism. In actual production, materials, dust, and other impurities adhere to the surface of the calendering rolls. Additionally, waxy or granular crystals may precipitate on the calendering rolls themselves. Furthermore, pits and uneven structures may appear on the surface of the calendering rolls after being squeezed by particles. All of these surface defects of the calendering rolls directly affect the surface quality of the calendered sheets. Therefore, in order to clean the surface of the calendering rolls in a timely manner, various cleaning devices for the surface of calendering rolls have been disclosed in the prior art.

[0003] Among them, a self-cleaning calender disclosed in the prior art with the publication number "CN213563906U" includes a frame and a pressure roller rotatably disposed on the frame. This utility model also includes a cleaning unit, which includes a first receiving groove and a second receiving groove sequentially formed on the frame in the direction close to the pressure roller. The first receiving groove and the second receiving groove are adapted to the roller shaft of the cleaning roller. The first receiving groove and the second receiving groove are connected by a rolling channel for rolling the cleaning roller from the second receiving groove to the first receiving groove. The self-cleaning calender with the above structure, by setting the cleaning unit, can roll the cleaning roller from the second receiving groove to the first receiving groove after a period of use. At this time, the cleaning roller contacts the outer surface of the pressure roller, thereby cleaning the pressure roller during the rotation of the pressure roller.

[0004] However, the self-cleaning calender described above still has some obvious defects in use: the device can only perform roller pressing cleaning on the surface of the calender rolls. On the one hand, it is difficult to effectively clean the oily and waxy substances adhering to the calender rolls by roller pressing. On the other hand, the cleaning device cannot detect the cleanliness of the calender roll surface and it is difficult to know the cleanliness of the surface. In addition, the device is limited to cleaning the surface of the calender rolls, and its function is relatively simple and cannot meet the various needs of the calender roll surface. Summary of the Invention

[0005] The purpose of this invention is to provide a calendering roll cleaning mechanism and a sheet production line thereof to solve the problems mentioned in the background art.

[0006] To achieve the above objectives, the present invention provides the following technical solution:

[0007] A calender roll cleaning mechanism includes a movable roll table that moves linearly along a guide rail laid on the ground. A roll table frame is fixedly mounted on the movable roll table, and several roller frames are flexibly mounted on the roll table frame. Calender rolls are movably mounted on each roller frame. Lifting guide rails are also provided on both sides of the roll table frame, and lifting mechanism boxes are slidably mounted on the lifting guide rails on both sides. A cleaning connecting rod is telescopically mounted on the lifting mechanism box, and a cleaning box is fixedly mounted on the side of the cleaning connecting rod away from the lifting mechanism box.

[0008] The cleaning box includes an arc-shaped cleaning surface that movably conforms to the surface of the calender roll. A cleaning sponge strip and a scraper are provided on one side of the arc-shaped cleaning surface. The cleaning sponge strip is connected to a cleaning agent storage chamber inside the cleaning box. The cleaning medium inside the cleaning agent storage chamber enters the cleaning sponge strip under the pressure of a pumping mechanism. A detection chamber is also provided on one side of the arc-shaped cleaning surface of the cleaning box. A linear array of laser beam transmitters and receivers is arranged within the detection chamber. When the surface of the calender roll is bright, clean, and free of pits or protrusions, a laser beam emitted from the laser beam transmitter passes through the surface of the calender roll. After mirror reflection, the laser beam is received by the wire harness receiver. When the surface of the calender roll is stained or uneven, the wire harness receiver cannot receive the laser beam emitted by the wire harness transmitter. The calender roll shaft is also fitted with a positioning roller sleeve, which is used to calibrate the rotation angle of the calender roll. When pits or protrusions appear on the surface of the calender roll, the positioning roller sleeve is used to calibrate the angle of the calender roll when the laser beam cannot be received normally, and to position the wire harness receiver that cannot receive the laser beam normally. This allows for precise positioning of the pits or protrusions on the calender roll.

[0009] Preferably, the two ends of the calender roll are provided with positioning laser receivers, and the inner side of the cleaning link is provided with a positioning laser emitter that cooperates with the positioning laser receivers. When the positioning laser receivers and positioning laser emitters on both sides cooperate, the axis of the arc-shaped cleaning surface and the axis of the calender roll are in the same horizontal plane.

[0010] Preferably, the pumping mechanism for conveying the cleaning medium from the cleaning agent storage chamber to the cleaning sponge strip includes driven rubber wheels movably arranged on both sides of the cleaning box, and driving rubber wheels that cooperate with the driven rubber wheels are fixedly installed on the roller shafts on both sides of the calendering roller. An eccentric connecting rod is also provided on one side of the driven rubber wheel, and a piston connecting rod is sleeved on the eccentric connecting rod. The piston connecting rod is located in a piston cylinder, and an air inlet plate is provided in the piston cylinder. Both the piston connecting rod and the air inlet plate are provided with one-way air inlet valves. The piston cylinder is connected to the cleaning agent storage chamber through an air inlet pipe.

[0011] Preferably, the number of roller frames N ≥ 3.

[0012] Preferably, a drive motor is also fixedly installed on the roller frame, and a drive pulley is fixedly connected to the drive shaft of the drive motor. The drive pulley is connected to the driven pulley via a conveyor belt, and the driven pulley is fixedly installed on the roller shaft of the calendering roll.

[0013] A sheet production line includes, in sequence from front to back, a mixer, a feeder, a single-screw cone double feeder, a melting feeder, a calendering roller table, an upper support, a lower support, a knife adjusting platform, an edge trimmer, and a shearing machine, wherein the calendering roller table adopts the aforementioned calendering roller cleaning mechanism.

[0014] Compared with the prior art, the beneficial effects of the present invention are:

[0015] This invention effectively cleans the surface of calender rolls by scraping them and applying a cleaning medium. Furthermore, the device not only effectively cleans the roll surface but also detects its cleanliness, thus automating the cleaning process. In addition to cleaning, this invention also serves as a roll surface flatness detection device. By cleaning the roll surface and detecting its cleanliness and flatness, it further locates protrusions and pits, facilitating rapid positioning and identification, thereby ensuring the uniformity of the produced sheets. Attached Figure Description

[0016] Figure 1 This is a schematic diagram of the overall structure of the sheet production line of the present invention;

[0017] Figure 2 This is a schematic diagram of the roller frame and its connection structure of the present invention;

[0018] Figure 3 This is a schematic diagram of the process of the cleaning box and the calendering roll cooperating in this invention;

[0019] Figure 4 This is a schematic diagram illustrating the positioning of the pit protrusions on the surface of the calender roll according to the present invention;

[0020] Figure 5 This is a cross-sectional schematic diagram of the cleaning process of the cleaning box according to the present invention;

[0021] Figure 6 This is a schematic diagram of the enlarged structure of region A of the present invention;

[0022] Figure 7 This is a schematic diagram illustrating the principle of laser beam deflection when pits appear on the surface of the calender roll in this invention.

[0023] In the diagram: 1. Moving roller table, 2. Roller table frame, 3. Roller frame, 4. Calendering roller, 5. Lifting guide rail, 6. Lifting mechanism box, 7. Cleaning connecting rod, 8. Cleaning box, 9. Arc-shaped cleaning surface, 10. Cleaning sponge strip, 11. Scraper, 12. Cleaning agent storage chamber, 13. Detection chamber, 14. Wire harness transmitter, 15. Wire harness receiver, 16. Positioning roller sleeve, 17. Positioning laser receiver, 18. Positioning laser transmitter, 19. Driven rubber wheel, 20. Driven rubber wheel, 21. Eccentric connecting rod, 22. Piston connecting rod, 23. Piston cylinder, 24. Air inlet plate, 25. One-way air inlet valve, 26. Air inlet pipe, 27. Drive motor, 28. Drive pulley, 29. Driven pulley, 30. Internal mixer, 31. Feeder, 32. Single screw cone double feeder, 33. Melting propulsion box, 34. Calendering roller table, 35. Upper support frame, 36. Lower support frame, 37. Knife adjustment platform, 38. Edge trimmer, 39. Shearing machine. Detailed Implementation

[0024] 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.

[0025] Please see Figure 1-7 The present invention provides a technical solution:

[0026] Example 1:

[0027] A calendering roll cleaning mechanism includes a movable roller table 1, which moves linearly along a guide rail laid on the ground. A roller table frame 2 is fixedly installed on the movable roller table 1. Several roller frames 3 are lifted and lowered on the roller table frame 2. Calendering rolls 4 are movably installed on each roller frame 3. Lifting guide rails 5 are also provided on both sides of the roller table frame 2. Lifting mechanism boxes 6 are slidably installed on the lifting guide rails 5 on both sides. Cleaning connecting rods 7 are telescopically installed on the lifting mechanism boxes 6. A cleaning box 8 is fixedly installed on the side of the cleaning connecting rods 7 away from the lifting mechanism box 6.

[0028] The cleaning box 8 includes an arc-shaped cleaning surface 9 that movably contacts the surface of the calender roll 4. A cleaning sponge strip 10 and a scraper strip 11 are provided on one side of the arc-shaped cleaning surface 9. The cleaning sponge strip 10 is connected to a cleaning agent storage chamber 12 inside the cleaning box 8. The cleaning medium inside the cleaning agent storage chamber 12 enters the cleaning sponge strip 10 under the push of a pumping mechanism. A detection chamber 13 is also provided on one side of the arc-shaped cleaning surface 9 of the cleaning box 8. A linear array of wire harness transmitters 14 and wire harness receivers 15 are arranged within the detection chamber 13. When the surface of the calender roll 4 is bright, clean, and free of pits or protrusions, the laser beam emitted from the wire harness transmitter 14 passes through the calender roll 4. After being reflected by the surface mirror, the laser beam is received by the wire harness receiver 15. When the surface of the calender roll 4 is stained or uneven, the wire harness receiver 15 cannot receive the laser beam emitted by the wire harness transmitter 14. The calender roll 4 is also fitted with a positioning roller sleeve 16. The positioning roller sleeve 16 is used to calibrate the rotation angle of the calender roll 4. When pits or protrusions appear on the surface of the calender roll 4, the positioning roller sleeve 16 is used to calibrate the angle of the calender roll 4 when the laser beam cannot be received normally, and to position the wire harness receiver 15 that cannot receive the laser beam normally. This allows for precise positioning of the pits or protrusions on the calender roll 4.

[0029] In this embodiment, the movable roller table 1 serves as a support mechanism for various components. It is driven by a translation motor located at its bottom, allowing it to move linearly along a guide rail laid on the ground. The roller table frame 2 is used to mount the roller frame 3. In this embodiment, the roller frame 3 is adjustable in height according to the thickness of the sheet to be produced. The spacing between the calendering rollers 4 is adjusted by adjusting the spacing between the roller frames 3. In this embodiment, there are three roller frames 3 and three calendering rollers 4 that cooperate with them. This number is also a common setting for calendering rollers 4 in the prior art. Since the surface of calendering rollers is usually bright... Like a mirror surface, sheet polymer materials can be pressed out through the smooth surface of the calendering roller 4. However, due to surface defects such as scratches, exudates, material adhesion, waxy exudate, and pits on the calendering roller 4 during use, abnormalities in the produced sheets can occur. Therefore, to ensure the uniformity of the produced sheets, the surface of the calendering roller 4 needs to be cleaned and inspected before and during production breaks. In this embodiment, the surface is scraped by a cleaning sponge strip 10, and the cleaning medium injected from the cleaning agent storage chamber 12 can quickly and effectively clean the surface of the calendering roller 4. The surface of the calender roll 4 is cleaned to remove adhering materials and various precipitates. To further ensure the cleaning effect, this embodiment also includes a wire harness transmitter 14 and a wire harness receiver 15 for detecting the surface of the calender roll 4. During the cleaning process, the adhering materials and surface precipitates affect the mirror refraction of the roll surface. Therefore, by inputting the data from the wire harness receiver 15 into the MCU control system, the cleanliness of the roll surface can be determined. After the roll surface is cleaned, the wire harness transmitter 14 and the wire harness receiver 15 again become the detection mechanism for the unevenness and pits on the roll surface. Because the pit structure affects the laser beam... The refraction angle is such that this method not only enables the identification of the cleanliness of the roll surface, but also detects the uneven pit structure on the surface of the calender roll 4. Furthermore, the wire harness transmitter 14 and the wire harness receiver 15 are linearly arranged and correspond one-to-one. Simultaneously, a positioning roller sleeve 16 is also provided on the roller shaft of the calender roll 4. This positioning roller sleeve 16 is fixedly mounted on the roller frame 2. Therefore, through the sensor built into the positioning roller sleeve 16, by evenly dividing the roller shaft into several equal parts, the positioning roller sleeve 16 can accurately position the rotational position of the calender roll 4 during its rotation. (Refer to the attached instruction manual.) Figure 4 Since the rotation angle of the calender roll 4 is determined, the position of the laser beam receiving head 15 where the laser beam deviates can be calibrated to accurately locate the pits on the surface of the calender roll 4. The positioning method of the positioning roller sleeve 16 is a common structure in the prior art, and will not be described again. Since the pits on the surface of the calender roll 4 are difficult to detect with the naked eye in time, this method can detect the position of the pits on the surface of the calender roll 4 in a relatively timely manner.

[0030] Example 2:

[0031] The two ends of the calender roll 4 are also provided with positioning laser receivers 17, and the inner side of the cleaning link 7 is also provided with positioning laser emitters 18 that cooperate with the positioning laser receivers 17. When the positioning laser receivers 17 and positioning laser emitters 18 on both sides cooperate, the axis of the arc-shaped cleaning surface 9 is in the same horizontal plane as the axis of the calender roll 4. In this embodiment, since the roller table 2 is adjusted according to the thickness of the sheet material being produced, in order to ensure that the arc-shaped cleaning surface 9 of the cleaning box 8 can accurately cooperate with the roller surface of the calender roll 4, a positioning laser receiver 17 is provided at the axis of the calender roll 4, and a positioning laser emitter 18 is provided on the cleaning link 7. When the laser receivers 17 and positioning laser emitters 18 cooperate, the axis of the arc-shaped cleaning surface 9 is in the same horizontal plane as the axis of the calender roll 4, thereby effectively ensuring that the arc-shaped cleaning surface 9 and the roller surface of the calender roll 4 are evenly and fully attached, thus ensuring that the calender roll 4 can be effectively cleaned.

[0032] Example 3:

[0033] The pumping mechanism that conveys the cleaning medium from the cleaning agent storage chamber 12 to the cleaning sponge strip 10 includes driven rubber wheels 19 movably arranged on both sides of the cleaning box 8, and driving rubber wheels 20 that cooperate with the driven rubber wheels 19 are fixedly installed on the roller shafts on both sides of the calendering roller 4. An eccentric connecting rod 21 is also provided on one side of the driven rubber wheel 19, and a piston connecting rod 22 is sleeved on the eccentric connecting rod 21. The piston connecting rod 22 is located in the piston cylinder 23, and an air inlet plate 24 is provided in the piston cylinder 23. The piston connecting rod 22 and the air inlet plate are also included. Each of the 24 components is equipped with a one-way air inlet valve 25. The piston cylinder 23 is connected to the cleaning agent storage chamber 12 via the air inlet pipe 26. In this embodiment, the pumping mechanism is driven by a calender roller 4. Since the calender roller 4 needs to rotate during the cleaning process to ensure that all parts are thoroughly cleaned, the power of the calender roller 4 is transmitted to the cleaning box 8 through the cooperation of the driving roller 20 and the driven roller 19. The rotation of the calender roller 4 drives the driven roller 19 to rotate. The eccentric connecting rod 21 rotates, which in turn causes the piston connecting rod 22 to extend and retract. This extension and retraction of the piston connecting rod 22 allows gas to enter the cleaning agent storage chamber 12 in one direction. In this embodiment, the cleaning agent storage chamber 12 is sealed. When the internal air pressure increases, the gas pushes the cleaning medium stored inside into the cleaning sponge strip 10. The cleaning medium is then applied to the calender roller 4 through contact between the cleaning sponge strip 10 and the calender roller 4. The friction between the cleaning sponge strip 10 and the surface of the calender roller 4 cleans the surface. In this embodiment, the cleaning sponge strip 10 is detachable and replaceable for easy replacement. A drive motor 27 is also fixedly installed on the roller frame 3. A drive pulley 28 is fixedly connected to the drive shaft of the drive motor 27. The drive pulley 28 is connected to the driven pulley 29 via a conveyor belt. The driven pulley 29 is fixedly installed on the roller shaft of the calender roller 4. The rotation of the drive motor 27 drives the calender roller 4 to rotate, thereby realizing the application of the cleaning medium.

[0034] A sheet production line includes a mixer 30, a feeder 31, a single-screw cone double feeder 32, a melt feeder 33, a calendering roller table 34, an upper support 35, a lower support 36, a knife adjustment platform 37, an edge trimmer 38, and a shearing machine 39 arranged in a front-to-back sequence, wherein the calendering roller table 39 adopts the aforementioned calendering roller cleaning mechanism.

[0035] 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 calender roll cleaning mechanism, comprising a movable roll table, the movable roll table moving linearly along a guide rail laid on the ground, a roll table frame fixedly mounted on the movable roll table, and a plurality of roller frames movably mounted on the roller frames, each roller frame having a calender roll movably mounted thereon, characterized in that: The roller table frame is also provided with lifting guide rails on both sides, and lifting mechanism boxes are slidably arranged on the lifting guide rails on both sides. A cleaning connecting rod is telescopically arranged on the lifting mechanism box, and a cleaning box is fixedly arranged on the side of the cleaning connecting rod away from the lifting mechanism box. The cleaning box includes an arc-shaped cleaning surface that movably conforms to the surface of the calender roll. A cleaning sponge strip and a scraper are provided on one side of the arc-shaped cleaning surface. The cleaning sponge strip is connected to a cleaning agent storage chamber inside the cleaning box. The cleaning medium inside the cleaning agent storage chamber enters the cleaning sponge strip under the pressure of a pumping mechanism. A detection chamber is also provided on one side of the arc-shaped cleaning surface of the cleaning box. A linear array of laser beam transmitters and receivers is arranged within the detection chamber. When the surface of the calender roll is bright, clean, and free of pits or protrusions, a laser beam emitted from the laser beam transmitter passes through the surface of the calender roll. After mirror reflection, the laser beam is received by the beam receiver. When the surface of the calender roll is stained or uneven, the beam receiver cannot receive the laser beam emitted by the beam transmitter. The calender roll shaft is also fitted with a positioning roller sleeve, which is used to calibrate the rotation angle of the calender roll. When pits or protrusions appear on the surface of the calender roll, the positioning roller sleeve is used to calibrate the angle of the calender roll when the laser beam cannot be received normally, and to position the beam receiver that cannot receive the laser beam normally. This allows for precise positioning of the pits or protrusions on the calender roll. The calendering roll is equipped with positioning laser receivers at both ends of the roll shaft, and the cleaning link is equipped with a positioning laser emitter that cooperates with the positioning laser receivers. When the positioning laser receivers and positioning laser emitters on both sides cooperate, the axis of the arc-shaped cleaning surface and the axis of the calendering roll are in the same horizontal plane.

2. The calender roll cleaning mechanism according to claim 1, characterized in that: The pumping mechanism that delivers the cleaning medium from the cleaning agent storage chamber to the cleaning sponge strip includes driven rubber wheels movably arranged on both sides of the cleaning box. Driven rubber wheels that cooperate with the driven rubber wheels are fixedly installed on the roller shafts on both sides of the calendering roller. An eccentric connecting rod is also provided on one side of the driven rubber wheel. A piston connecting rod is sleeved on the eccentric connecting rod. The piston connecting rod is located in a piston cylinder. An air inlet plate is provided in the piston cylinder. Both the piston connecting rod and the air inlet plate are provided with one-way air inlet valves. The piston cylinder is connected to the cleaning agent storage chamber through an air inlet pipe.

3. The calendering roll cleaning mechanism according to claim 2, characterized in that: The number of roller frames, N, is ≥ 3.

4. A calender roll cleaning mechanism according to claim 3, characterized in that: A drive motor is also fixedly installed on the roller frame. A drive pulley is fixedly connected to the drive shaft of the drive motor. The drive pulley is connected to the driven pulley via a conveyor belt. The driven pulley is fixedly installed on the roller shaft of the calendering roll.

5. A sheet production line, comprising, in sequence from front to back, a mixer, a feeder, a single-screw cone double feeder, a melting feeder, a calendering roller table, an upper support, a lower support, a knife adjusting platform, an edge trimmer, and a shearing machine, characterized in that: The calendering roll table adopts the calendering roll cleaning mechanism described in any one of claims 1-4.

Images