Kraft paper drying and setting machine with adjustable distance

Abstract

The invention relates to the technical field of kraft paper drying and setting, and particularly discloses a distance-adjustable kraft paper drying and setting machine. Comprising a rectangular ventilation shell, a top connection round hole is formed in one side of the rectangular ventilation shell, an exhaust round hole is formed in the side, away from the top connection round hole, of the rectangular ventilation shell, and a side connection curved block is fixedly connected to the outer side of the rectangular ventilation shell. Symmetrical rectangular ventilation shells are arranged at the top and the bottom of kraft paper at the same time to conduct double-face drying and shaping on the kraft paper, and the situation that the bottom face of the kraft paper placed on a conveying belt is covered, consequently, the bottom face of the kraft paper is not fully dried and shaped, and the shaping effect is affected is prevented. The vertical electric sliding rail drives the rectangular ventilation shell to move so as to adjust the distance between the rectangular ventilation shell and the kraft paper, and the situation that when the kraft paper of different thicknesses or types is dried, the distance is difficult to control, the kraft paper is excessively dried or insufficiently dried, and the shaping effect of the kraft paper is affected is prevented.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of kraft paper drying and setting, in particular to a distance-adjustable kraft paper drying and setting machine. BACKGROUND

[0002] Kraft paper is usually brown, and semi-bleached or fully bleached kraft pulp is light brown, cream or white, with a basis weight of generally 80-120g / m2, a breaking length of generally more than 6000m, and high tear resistance, burst strength and dynamic strength. It is mainly used as packaging material and can be divided into packaging kraft paper, waterproof kraft paper, moisture-proof kraft paper, rust-proof kraft paper, printing kraft paper, process kraft paper, insulating kraft paper board and kraft paper stickers according to different uses. Different types of kraft paper often need to be coated or film-coated on the surface. The kraft paper production process takes sulfite pulping as the core, combines with papermaking, post-treatment and other links to form a high-strength and environmentally friendly paper production process. In the papermaking process, the kraft paper needs to be dried.

[0003] Chinese patent CN202310172249.X discloses a kraft paper drying device that can achieve rapid drying effect of kraft paper, but only one side of the kraft paper is dried, so that the bottom surface in contact with the conveying belt is covered and difficult to be fully contacted with the gas for drying, which affects the setting effect. Therefore, we propose a distance-adjustable kraft paper drying and setting machine. SUMMARY

[0004] To solve the above technical problems, the present application provides a distance-adjustable kraft paper drying and setting machine, which comprises a rectangular drying box, two sides of the rectangular drying box are provided with pressure relief round holes, the inner wall of the rectangular drying box is fixedly connected with a distance-adjustable drying device, one side of the distance-adjustable drying device penetrates and is slidably connected with a top connecting air pipe, one end of the top connecting air pipe away from the distance-adjustable drying device is communicated with a frame-shaped air pipe, the outer side of the frame-shaped air pipe is sleeved and fixedly connected with a fixed sleeve plate, the inner side of the frame-shaped air pipe is communicated with a side connecting air pipe, one end of the side connecting air pipe away from the frame-shaped air pipe is communicated with a high-pressure air pump, one side of the rectangular drying box is fixedly connected with a dust-screening feeding device, the inner wall of the rectangular drying box is fixedly connected with an auxiliary setting device, one side of the rectangular drying box away from the dust-screening feeding device is fixedly connected with a side-mounted fixed plate, and one side of the side-mounted fixed plate is rotatably connected with a winding roller through a rotating bolt.

[0005] The distance adjusting drying device includes a rectangular ventilation shell, a top connecting circular hole is formed on one side of the rectangular ventilation shell, an exhaust circular hole is formed on the side of the rectangular ventilation shell away from the top connecting circular hole, after being heated by the circular electric heating plate, air diffuses to the surroundings until the inside of the rectangular ventilation shell is filled, then the air is blown to the surface of the kraft paper through the exhaust circular hole, the kraft paper is dried and shaped on both sides by simultaneously arranging symmetrical rectangular ventilation shells on the top and bottom of the kraft paper, the outer side of the rectangular ventilation shell is fixedly connected with a side joint curved block, the side away from the rectangular ventilation shell of the side joint curved block is fixedly connected with a vertical electric sliding rail, the distance between the rectangular ventilation shell and the kraft paper is adjusted by driving the rectangular ventilation shell to move through the vertical electric sliding rail.

[0006] The plurality of pressure relief circular holes are distributed on both sides of the rectangular drying box, one end of the top connecting air pipe away from the distance adjusting drying device penetrates the rectangular drying box and is fixedly connected with the rectangular drying box.

[0007] The plurality of top connecting air pipes are distributed on the top and bottom of the rectangular drying box, one side of the fixed sleeve plate is fixedly connected with one side of the rectangular drying box, one end of the high-pressure air pump away from the side joint air pipe is connected with one side of the rectangular drying box in communication.

[0008] The inner wall of the top connecting circular hole is slidably connected with the outer side of the top connecting air pipe, the outer side of the vertical electric sliding rail is fixedly connected with the inner wall of the rectangular drying box, and the plurality of exhaust circular holes are distributed on one side of the rectangular ventilation shell.

[0009] The inner wall of the rectangular ventilation shell is fixedly connected with an embedded fixed plate, the inner side of the embedded fixed plate is fixedly connected with a circular electric heating plate, the side of the circular electric heating plate close to the top connecting circular hole is fixedly connected with a limiting top block, when the rectangular ventilation shell moves upward with the side joint curved block, the limiting top block in the rectangular ventilation shell moves together, when the limiting top block moves upward to contact the bottom of the top connecting air pipe, the limiting top block stops, and the distance between the rectangular ventilation shell and the kraft paper is limited by arranging the limiting top block on the top of the circular electric heating plate.

[0010] The plurality of embedded fixed plates are circumferentially distributed on the inner wall of the rectangular ventilation shell, and the plurality of limiting top blocks are circumferentially distributed on the inner wall of the rectangular ventilation shell.

[0011] Further, the dust screening type feeding device comprises a frame-shaped air inlet plate, dust round holes are formed in the top and bottom of the frame-shaped air inlet plate, the gas outside the rectangular drying box enters the rectangular drying box from the frame-shaped air inlet plate through the dust round holes, the dust round holes are formed in the frame-shaped air inlet plate to filter the dust in the gas entering the rectangular drying box, a side opening groove is formed in one side of the frame-shaped air inlet plate, a fixed side rod is fixedly connected to the inner wall of the side opening groove, the kraft paper pushes the arc-shaped long scraper to bend into the frame-shaped air inlet plate when passing through the symmetrically arranged arc-shaped long scraper, the fixed side rod is arranged in the side opening groove on the two sides of the arc-shaped long scraper to stabilize the shape of the arc-shaped long scraper, one side of the fixed side rod is fixedly connected with the arc-shaped long scraper, the surface of the kraft paper is in frictional contact with the arc-shaped long scraper when the winding roller is winding the kraft paper, the arc-shaped long scraper is used for scraping and cleaning the surface of the moving kraft paper, one side of the frame-shaped air inlet plate is fixedly connected with one side of the rectangular drying box, a plurality of dust round holes are arranged, and the plurality of dust round holes are distributed on the top and bottom of the frame-shaped air inlet plate, one side of the arc-shaped long scraper is fixedly connected with the inner wall of the frame-shaped air inlet plate, a plurality of arc-shaped long scrapers are arranged, and the plurality of arc-shaped long scrapers are symmetrically distributed on the inner wall of the frame-shaped air inlet plate.

[0012] Further, the auxiliary shaping device comprises a frame-shaped fixing plate, an auxiliary rotating roller is rotatably connected to the inner wall of the frame-shaped fixing plate through a rotating bolt, side-connection long pressing plates are fixedly connected to the two sides of the frame-shaped fixing plate, the kraft paper subjected to drying processing is located between the symmetrically arranged side-connection long pressing plates at any time when being located inside the rectangular drying box, the symmetrically arranged side-connection long pressing plates are arranged in the rectangular drying box to assist in limiting and shaping the kraft paper, ventilation round holes are formed in the bottom of the side-connection long pressing plate, the gas blown out of the exhaust round hole in the rectangular air shell passes through the ventilation round holes of the side-connection long pressing plate to contact the kraft paper, a plurality of ventilation round holes are formed in the side-connection long pressing plate to facilitate the contact between the gas and the kraft paper, a fillet ring block is fixedly connected to the bottom of the side-connection long pressing plate, the kraft paper is in smooth contact with the fillet ring block at any time when passing through the symmetrically arranged side-connection long pressing plates, the fillet ring block is arranged on the side of the side-connection long pressing plate in contact with the kraft paper to smoothly contact the surface of the kraft paper, the outer side of the frame-shaped fixing plate is fixedly connected with the inner wall of the rectangular drying box, a plurality of side-connection long pressing plates are arranged, and the plurality of side-connection long pressing plates are distributed on the two sides of the frame-shaped fixing plate, a plurality of ventilation round holes are arranged, and the plurality of ventilation round holes are distributed on the bottom of the side-connection long pressing plate, a plurality of fillet ring blocks are arranged, and the plurality of fillet ring blocks are distributed on the bottom of the side-connection long pressing plate and are aligned with the ventilation round holes.

[0013] The present application provides a distance-adjustable kraft paper drying and shaping machine.

[0014] 1. This adjustable-distance kraft paper drying and setting machine uses symmetrical rectangular ventilation shells at both the top and bottom of the kraft paper to perform double-sided drying and setting. This prevents the bottom surface of the kraft paper placed on the conveyor belt from being covered, which would result in insufficient drying and setting of the bottom surface and affect the setting effect. By opening dust-screening holes on the frame-shaped air inlet plate, dust is filtered from the air entering the rectangular drying chamber, preventing a large amount of dust particles and impurities around the rectangular drying chamber from being sucked in and adhering to the kraft paper, thus affecting the processing effect. By setting symmetrical side-connecting pressure plates inside the rectangular drying chamber, auxiliary limiting and setting of the kraft paper is performed, preventing the kraft paper inside the rectangular drying chamber from being affected by wind and bending to a certain extent during drying and setting, thus affecting the processing effect.

[0015] 2. This adjustable-distance kraft paper drying and setting machine is equipped with an adjustable-distance drying device. By simultaneously setting symmetrical rectangular ventilation shells at the top and bottom of the kraft paper, it can perform double-sided drying and setting of the kraft paper. This prevents the bottom surface of the kraft paper placed on the conveyor belt from being covered, which would result in the bottom surface of the kraft paper not being fully dried and set, thus affecting the setting effect. The rectangular ventilation shell is moved by a vertical electric slide rail to adjust the distance between the rectangular ventilation shell and the kraft paper. This prevents the difficulty in controlling the distance when drying kraft paper of different thicknesses or types, which could lead to over-drying or under-drying of the kraft paper and affect the setting effect. A limiting block is set on the top of the circular electric heating plate to limit the distance of the rectangular ventilation shell from the kraft paper. This prevents the circular electric heating plate inside the rectangular ventilation shell from moving upwards and contacting the top connecting air pipe, which would make it difficult for gas to enter the rectangular ventilation shell and affect the drying process.

[0016] 3. This adjustable-distance kraft paper drying and setting machine is equipped with a dust-screening feeding device. The arc-shaped long scraper cleans the moving kraft paper surface by scraping, preventing dust particles and impurities from covering the kraft paper surface and affecting the heat absorption effect, thus preventing the kraft paper from being completely dried before being rolled up. By setting fixed side rods in the side grooves on both sides of the arc-shaped long scraper, the shape of the arc-shaped long scraper is stabilized, preventing the arc-shaped long scraper from bending too much due to suction and thrust, which would prevent a large amount of gas from entering the frame-shaped air inlet plate through the dust-screening holes. By opening dust-screening holes on the frame-shaped air inlet plate, the gas entering the rectangular drying box is filtered for dust, preventing a large amount of dust particles and impurities around the rectangular drying box from being sucked in and adhering to the kraft paper, affecting the processing effect of the kraft paper.

[0017] 4. This adjustable-distance kraft paper drying and setting machine is equipped with an auxiliary setting device. Symmetrical side-jointing pressure plates are set in the rectangular drying box to perform auxiliary limiting and setting of the kraft paper. This prevents the kraft paper in the rectangular drying box from being affected by wind and bending to a certain extent during drying and setting, thus affecting the processing effect. Multiple ventilation holes are opened on the side-jointing pressure plates to facilitate full contact between the gas and the kraft paper. This prevents the parts of the kraft paper surface covered by the side-jointing pressure plates from being unable to fully contact the gas and thus affecting the drying and setting effect. Rounded corner ring blocks are set on the side of the side-jointing pressure plates that contact the kraft paper to ensure smooth contact with the kraft paper surface. This prevents the constantly moving kraft paper from being easily scratched and deformed by the openings of the ventilation holes when it comes into contact with the side-jointing pressure plates. Attached Figure Description

[0018] Figure 1 This is a schematic diagram of the drying and shaping machine of the present invention;

[0019] Figure 2 This is a side sectional view of the drying and shaping machine of the present invention;

[0020] Figure 3 This is a schematic diagram of the adjustable-distance drying device of the present invention;

[0021] Figure 4 This is a schematic diagram of the internal structure of the adjustable-distance drying device of the present invention;

[0022] Figure 5 This is a schematic diagram of the structure of the dust-screening feeding device of the present invention;

[0023] Figure 6 This is a side sectional view of the dust-screening feeding device of the present invention.

[0024] Figure 7 This is a schematic diagram of the auxiliary shaping device of the present invention;

[0025] Figure 8 This is a schematic diagram of the bottom structure of the auxiliary shaping device of the present invention.

[0026] In the diagram: 1. Rectangular drying box; 2. Pressure relief hole; 3. Adjustable spacing drying device; 4. Top connecting air pipe; 5. Frame-shaped air pipe; 6. Fixed sleeve plate; 7. Side connecting air pipe; 8. High-pressure air pump; 9. Dust-screening feeding device; 10. Auxiliary shaping device; 11. Side fixed plate; 12. Rewinding roller; 301. Rectangular ventilation shell; 302. Top connecting hole; 303. Exhaust hole; 304. Side curved block; 305. Vertical electric slide rail; 306. Built-in fixing plate; 307. Circular electric heating plate; 308. Limiting top block; 901. Frame-shaped air inlet plate; 902. Dust sieve round hole; 903. Side-opening groove; 904. Fixed side rod; 905. Arc-shaped long scraper; 1001. Frame-shaped fixing plate; 1002. Auxiliary rotating roller; 1003. Side-connected long pressure plate; 1004. Ventilation round hole; 1005. Rounded corner ring block. Detailed Implementation

[0027] 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.

[0028] Please see Figures 1-4 This invention provides an adjustable-gap kraft paper drying and shaping machine, including a rectangular drying box 1. Both sides of the rectangular drying box 1 are provided with pressure relief holes 2. An adjustable-gap drying device 3 is fixedly connected to the inner wall of the rectangular drying box 1. A top connecting air pipe 4 is slidably connected through one side of the adjustable-gap drying device 3. A frame-shaped air pipe 5 is connected to the end of the top connecting air pipe 4 away from the adjustable-gap drying device 3. A fixing plate 6 is sleeved and fixedly connected to the outer side of the frame-shaped air pipe 5. A side connecting air pipe 7 is connected to the inner side of the frame-shaped air pipe 5. A high-pressure air pump 8 is connected to the end of the side connecting air pipe 7 away from the frame-shaped air pipe 5. A dust-screening feeding device 9 is fixedly connected to one side of the rectangular drying box 1. An auxiliary shaping device 10 is fixedly connected to the inner wall of the rectangular drying box 1. A side-mounted fixing plate 11 is fixedly connected to the side of the rectangular drying box 1 away from the dust-screening feeding device 9. A winding roller 12 is rotatably connected to one side of the side-mounted fixing plate 11 via a rotating bolt.

[0029] The adjustable-gap drying device 3 includes a rectangular ventilation shell 301. A top connecting round hole 302 is provided on one side of the rectangular ventilation shell 301, and an exhaust round hole 303 is provided on the side of the rectangular ventilation shell 301 away from the top connecting round hole 302. A side connecting curved block 304 is fixedly connected to the outer side of the rectangular ventilation shell 301, and a vertical electric slide rail 305 is fixedly connected to the side of the side connecting curved block 304 away from the rectangular ventilation shell 301.

[0030] Multiple pressure relief holes 2 are provided, and the multiple pressure relief holes 2 are respectively distributed on both sides of the rectangular drying box 1. The end of the top connecting air pipe 4 away from the adjustable distance drying device 3 passes through the rectangular drying box 1 and is fixedly connected to the rectangular drying box 1.

[0031] Multiple top-connecting air pipes 4 are provided, and the multiple top-connecting air pipes 4 are respectively distributed at the top and bottom of the rectangular drying box 1. One side of the fixed sleeve plate 6 is fixedly connected to one side of the rectangular drying box 1, and the end of the high-pressure air pump 8 away from the side-connecting air pipe 7 is connected to one side of the rectangular drying box 1.

[0032] The inner wall of the top connecting round hole 302 is slidably connected to the outer side of the top connecting air pipe 4, the outer side of the vertical electric slide rail 305 is fixedly connected to the inner wall of the rectangular drying box 1, and multiple exhaust round holes 303 are provided, and multiple exhaust round holes 303 are distributed on one side of the rectangular ventilation shell 301.

[0033] An internal fixing plate 306 is fixedly connected to the inner wall of the rectangular vent shell 301. A circular electric heating plate 307 is fixedly connected to the inner side of the internal fixing plate 306. A limit block 308 is fixedly connected to the side of the circular electric heating plate 307 near the top connecting circular hole 302.

[0034] Multiple built-in fixing plates 306 are provided, and the multiple built-in fixing plates 306 are circumferentially distributed on the inner wall of the rectangular ventilation shell 301. Multiple limiting top blocks 308 are provided, and the multiple limiting top blocks 308 are circumferentially distributed on the inner wall of the rectangular ventilation shell 301. In use, the kraft paper to be dried and shaped is passed sequentially between the dust-screening feeding device 9 and the two symmetrically arranged auxiliary shaping devices 10, and then fixed on the take-up roller 12. The surface of the kraft paper is pre-treated by the dust-screening feeding device 9, while the auxiliary shaping devices 10 in the rectangular drying box 1 are simultaneously processed. The kraft paper is double-sided and the winding roller 12 rotates to wind the kraft paper. At the same time, the high-pressure air pump 8 draws the gas in the rectangular drying box 1 into the side air pipe 7. The gas passes through the side air pipe 7, the frame-shaped air pipe 5 and the top air pipe 4 in sequence and enters the adjustable-gap drying device 3. The adjustable-gap drying device 3 heats both sides of the kraft paper to dry and shape it at the same time. The pressure relief holes 2 on both sides of the rectangular drying box 1 facilitate the auxiliary discharge of the internal gas to prevent the rectangular drying box 1 from being under high pressure due to temperature and affecting the drying and shaping effect of the kraft paper.

[0035] The gas drawn in by the high-pressure air pump 8 enters the rectangular ventilation shell 301 through the top connecting air pipe 4 and comes into contact with the circular heating plate 307. After being heated by the circular heating plate 307, the gas diffuses outwards until it fills the interior of the rectangular ventilation shell 301. Then, it is blown onto the surface of the kraft paper through the exhaust hole 303. By setting symmetrical rectangular ventilation shells 301 at both the top and bottom of the kraft paper, the kraft paper is dried and shaped on both sides. The vertical electric slide rail 305 drives the side curved block 304 to move, thus moving the rectangular ventilation shell 301. The rectangular ventilator 301 is moved by the vertical electric slide rail 305 to adjust the distance between the rectangular ventilator 301 and the kraft paper. When the rectangular ventilator 301 moves upward with the side curved block 304, it drives the internal limiting top block 308 to move together. The limiting top block 308 stops when the rectangular ventilator 301 moves upward and contacts the bottom of the top connecting air pipe 4. The distance of the rectangular ventilator 301 away from the kraft paper is limited by the limiting top block 308 set on the top of the circular electric heating plate 307.

[0036] Please see Figures 5-8 This invention provides an adjustable-distance kraft paper drying and shaping machine: a dust-screening feeding device 9 includes a frame-shaped air inlet plate 901, with dust-screening round holes 902 opened at the top and bottom of the frame-shaped air inlet plate 901, a side-opening groove 903 opened on one side of the frame-shaped air inlet plate 901, a fixed side rod 904 fixedly connected to the inner wall of the side-opening groove 903, an arc-shaped long scraper 905 fixedly connected to one side of the fixed side rod 904, one side of the frame-shaped air inlet plate 901 fixedly connected to one side of the rectangular drying box 1, multiple dust-screening round holes 902 are provided, and multiple dust-screening round holes 902 are respectively distributed at the top and bottom of the frame-shaped air inlet plate 901, one side of the arc-shaped long scraper 905 is fixedly connected to the inner wall of the frame-shaped air inlet plate 901, multiple arc-shaped long scrapers 905 are provided, and multiple arc-shaped long scrapers 905 are symmetrically distributed on the inner wall of the frame-shaped air inlet plate 901;

[0037] The auxiliary shaping device 10 includes a frame-shaped fixing plate 1001. An auxiliary rotating roller 1002 is rotatably connected to the inner wall of the frame-shaped fixing plate 1001 via a rotating bolt. Side-connecting long pressure plates 1003 are fixedly connected to both sides of the frame-shaped fixing plate 1001. Ventilation holes 1004 are opened at the bottom of the side-connecting long pressure plates 1003. Rounded corner ring blocks 1005 are fixedly connected to the bottom of the side-connecting long pressure plates 1003. The outer side of the frame-shaped fixing plate 1001 is fixedly connected to the inner wall of the rectangular drying box 1. Multiple side-connecting long pressure plates 1003 are provided, and the multiple side-connecting long pressure plates 1003 are respectively distributed on both sides of the frame-shaped fixing plate 1001. Multiple ventilation holes 1004 are provided, and the multiple ventilation holes 1004 are distributed at the bottom of the side-connecting long pressure plates 1003. Multiple rounded corner ring blocks 1005 are provided, and the multiple rounded corner ring blocks 1005 are distributed at the bottom of the side-connecting long pressure plates 1003 aligned with the ventilation holes 1004.

[0038] In use, when the kraft paper is fed, it needs to pass through the symmetrically arranged arc-shaped long scrapers 905 into the frame-shaped air inlet plate 901, and then enter the rectangular drying box 1 between the symmetrically arranged auxiliary shaping devices 10. When the winding roller 12 winds up the kraft paper, the surface of the kraft paper comes into frictional contact with the arc-shaped long scrapers 905. The arc-shaped long scrapers 905 scrape and clean the moving surface of the kraft paper. When the kraft paper passes through the symmetrically arranged arc-shaped long scrapers 905, it pushes the arc-shaped long scrapers 905 to bend into the frame-shaped air inlet plate 901. The arc-shaped long scrapers 905 are stabilized by setting fixed side rods 904 in the side opening grooves 903 on both sides of the arc-shaped long scrapers 905. The gas outside the rectangular drying box 1 enters the rectangular drying box 1 through the dust screening holes 902 from the frame-shaped air inlet plate 901. The dust screening holes 902 are opened on the frame-shaped air inlet plate 901 to filter dust from the gas entering the rectangular drying box 1.

[0039] Kraft paper enters the rectangular drying chamber 1 and passes through symmetrically arranged side-connecting long pressure plates 1003 before being fixed to the winding roller 12. The kraft paper undergoing drying is located inside the rectangular drying chamber 1 and is always positioned between the symmetrical side-connecting long pressure plates 1003. The symmetrical side-connecting long pressure plates 1003 are arranged inside the rectangular drying chamber 1 to assist in limiting and shaping the kraft paper. At the same time, the gas blown out from the exhaust hole 303 inside the rectangular ventilation shell 301 passes through the ventilation hole 1004 of the side-connecting long pressure plate 1003 and comes into contact with the kraft paper. Multiple ventilation holes 1004 are opened on the side-connecting long pressure plate 1003 to facilitate full contact between the gas and the kraft paper. The kraft paper is in smooth contact with the rounded corner ring block 1005 at all times as it passes between the symmetrically arranged side-connecting long pressure plates 1003. The rounded corner ring block 1005 is provided on the side of the side-connecting long pressure plate 1003 that is in contact with the kraft paper to ensure smooth contact with the surface of the kraft paper.

[0040] In operation, the kraft paper to be dried and shaped is passed sequentially between the dust-screening feeding device 9 and two symmetrically arranged auxiliary shaping devices 10, and fixed on the winding roller 12. The dust-screening feeding device 9 pre-treats the surface of the kraft paper, while the auxiliary shaping devices 10 in the rectangular drying box 1 limit the kraft paper on both sides. When the winding roller 12 rotates, it winds up the kraft paper. At the same time, the high-pressure air pump 8 draws the gas in the rectangular drying box 1 into the side air pipe 7. The gas passes sequentially from the side air pipe 7 through the frame-shaped air pipe 5 and the top air pipe 4 into the adjustable-gap drying device 3. The adjustable-gap drying device 3 heats both sides of the kraft paper to dry and shape simultaneously. The pressure relief holes 2 on both sides of the rectangular drying box 1 facilitate the auxiliary discharge of the internal gas, so as to prevent the rectangular drying box 1 from being under high pressure due to temperature, which would affect the drying and shaping effect of the kraft paper.

[0041] The gas drawn in by the high-pressure air pump 8 enters the rectangular ventilation shell 301 through the top connecting air pipe 4 and comes into contact with the circular heating plate 307. After being heated by the circular heating plate 307, the gas diffuses outwards until it fills the interior of the rectangular ventilation shell 301. Then, it is blown onto the surface of the kraft paper through the exhaust hole 303. By setting symmetrical rectangular ventilation shells 301 at both the top and bottom of the kraft paper, the kraft paper is dried and shaped on both sides. The vertical electric slide rail 305 drives the side curved block 304 to move, thus moving the rectangular ventilation shell 301. The rectangular vent housing 301 is moved by the vertical electric slide rail 305 to adjust the distance between the rectangular vent housing 301 and the kraft paper. When the rectangular vent housing 301 moves upward with the side curved block 304, it drives the internal limiting top block 308 to move together. The limiting top block 308 stops when the rectangular vent housing 301 moves upward and contacts the bottom of the top connecting air pipe 4. The distance of the rectangular vent housing 301 away from the kraft paper is limited by the limiting top block 308 set on the top of the circular electric heating plate 307.

[0042] When kraft paper is fed, it needs to pass through symmetrically arranged arc-shaped long scrapers 905 into the frame-shaped air inlet plate 901, and then enter the rectangular drying box 1 between symmetrically arranged auxiliary shaping devices 10. When the winding roller 12 winds up the kraft paper, the surface of the kraft paper comes into frictional contact with the arc-shaped long scrapers 905. The arc-shaped long scrapers 905 scrape and clean the moving surface of the kraft paper. When the kraft paper passes through the symmetrically arranged arc-shaped long scrapers 905, it pushes the arc-shaped long scrapers 905 to bend into the frame-shaped air inlet plate 901. The arc-shaped long scrapers 905 are stabilized by setting fixed side rods 904 in the side opening grooves 903 on both sides of the arc-shaped long scrapers 905. The gas outside the rectangular drying box 1 enters the rectangular drying box 1 through the dust screening holes 902 from the frame-shaped air inlet plate 901. The dust screening holes 902 are opened on the frame-shaped air inlet plate 901 to filter dust from the gas entering the rectangular drying box 1.

[0043] Kraft paper enters the rectangular drying chamber 1 and passes through symmetrically arranged side-connecting long pressure plates 1003 before being fixed to the winding roller 12. The kraft paper undergoing drying is located inside the rectangular drying chamber 1 and is always positioned between the symmetrical side-connecting long pressure plates 1003. The symmetrical side-connecting long pressure plates 1003 are arranged inside the rectangular drying chamber 1 to assist in limiting and shaping the kraft paper. At the same time, the gas blown out from the exhaust hole 303 inside the rectangular ventilation shell 301 passes through the ventilation hole 1004 of the side-connecting long pressure plate 1003 and comes into contact with the kraft paper. Multiple ventilation holes 1004 are opened on the side-connecting long pressure plate 1003 to facilitate full contact between the gas and the kraft paper. The kraft paper is in smooth contact with the rounded corner ring block 1005 at all times as it passes between the symmetrically arranged side-connecting long pressure plates 1003. The rounded corner ring block 1005 is provided on the side of the side-connecting long pressure plate 1003 that is in contact with the kraft paper to ensure smooth contact with the surface of the kraft paper.

[0044] 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. An adjustable-gap kraft paper drying and setting machine, comprising a rectangular drying chamber (1), characterized in that: The rectangular drying box (1) has pressure relief holes (2) on both sides. An adjustable-distance drying device (3) is fixedly connected to the inner wall of the rectangular drying box (1). A top connecting air pipe (4) is slidably connected to one side of the adjustable-distance drying device (3). A frame-shaped air pipe (5) is connected to the end of the top connecting air pipe (4) away from the adjustable-distance drying device (3). A fixing plate (6) is fitted and fixedly connected to the outside of the frame-shaped air pipe (5). A side connecting air pipe is connected to the inside of the frame-shaped air pipe (5). The side air pipe (7) is connected to a high-pressure air pump (8) at one end away from the frame-shaped air pipe (5). A dust-screening feeding device (9) is fixedly connected to one side of the rectangular drying box (1). An auxiliary shaping device (10) is fixedly connected to the inner wall of the rectangular drying box (1). A side-mounted fixing plate (11) is fixedly connected to the side of the rectangular drying box (1) away from the dust-screening feeding device (9). A winding roller (12) is rotatably connected to one side of the side-mounted fixing plate (11) through a rotating bolt. The adjustable-distance drying device (3) includes a rectangular vent shell (301), one side of which is provided with a top connecting round hole (302), and the side of the rectangular vent shell (301) away from the top connecting round hole (302) is provided with an exhaust round hole (303). A side connecting curved block (304) is fixedly connected to the outside of the rectangular vent shell (301), and a vertical electric slide rail (305) is fixedly connected to the side of the side connecting curved block (304) away from the rectangular vent shell (301).

2. The adjustable-gap kraft paper drying and setting machine according to claim 1, characterized in that: Multiple pressure relief holes (2) are provided, and the multiple pressure relief holes (2) are respectively distributed on both sides of the rectangular drying box (1). The top connecting air pipe (4) passes through the rectangular drying box (1) at the end away from the adjustable distance drying device (3) and is fixedly connected to the rectangular drying box (1).

3. The adjustable-gap kraft paper drying and setting machine according to claim 1, characterized in that: Multiple top-connecting air pipes (4) are provided, and the multiple top-connecting air pipes (4) are respectively distributed at the top and bottom of the rectangular drying box (1). One side of the fixed sleeve plate (6) is fixedly connected to one side of the rectangular drying box (1), and the end of the high-pressure air pump (8) away from the side-connecting air pipe (7) is connected to one side of the rectangular drying box (1).

4. The adjustable-gap kraft paper drying and setting machine according to claim 1, characterized in that: The inner wall of the top connecting round hole (302) is slidably connected to the outer side of the top connecting air pipe (4), the outer side of the vertical electric slide rail (305) is fixedly connected to the inner wall of the rectangular drying box (1), and multiple exhaust round holes (303) are provided, and multiple exhaust round holes (303) are distributed on one side of the rectangular ventilation shell (301).

5. The adjustable-gap kraft paper drying and setting machine according to claim 1, characterized in that: The inner wall of the rectangular vent shell (301) is fixedly connected to an internal fixing plate (306), and the inner side of the internal fixing plate (306) is fixedly connected to a circular electric heating plate (307). A limiting top block (308) is fixedly connected to the side of the circular electric heating plate (307) near the top connecting round hole (302).

6. The adjustable-gap kraft paper drying and setting machine according to claim 5, characterized in that: Multiple built-in fixing plates (306) are provided, and the multiple built-in fixing plates (306) are respectively circumferentially distributed on the inner wall of the rectangular vent shell (301). Multiple limiting top blocks (308) are provided, and the multiple limiting top blocks (308) are respectively circumferentially distributed on the inner wall of the rectangular vent shell (301).

7. The adjustable-gap kraft paper drying and setting machine according to claim 1, characterized in that: The dust-screening feeding device (9) includes a frame-shaped air inlet plate (901), with dust-screening round holes (902) at the top and bottom of the frame-shaped air inlet plate (901), and a side-opening groove (903) on one side of the frame-shaped air inlet plate (901). A fixed side rod (904) is fixedly connected to the inner wall of the side-opening groove (903), and an arc-shaped long scraper (905) is fixedly connected to one side of the fixed side rod (904).

8. The adjustable-gap kraft paper drying and setting machine according to claim 7, characterized in that: One side of the frame-shaped air inlet plate (901) is fixedly connected to one side of the rectangular drying box (1). Multiple dust screening holes (902) are provided, and the multiple dust screening holes (902) are respectively distributed on the top and bottom of the frame-shaped air inlet plate (901). One side of the arc-shaped long scraper (905) is fixedly connected to the inner wall of the frame-shaped air inlet plate (901). Multiple arc-shaped long scrapers (905) are provided, and the multiple arc-shaped long scrapers (905) are symmetrically distributed on the inner wall of the frame-shaped air inlet plate (901).

9. The adjustable-gap kraft paper drying and setting machine according to claim 1, characterized in that: The auxiliary shaping device (10) includes a frame-shaped fixing plate (1001). The inner wall of the frame-shaped fixing plate (1001) is rotatably connected to an auxiliary rotating roller (1002) via a rotating bolt. Side extension pressure plates (1003) are fixedly connected to both sides of the frame-shaped fixing plate (1001). Ventilation holes (1004) are opened at the bottom of the side extension pressure plates (1003). Rounded corner ring blocks (1005) are fixedly connected to the bottom of the side extension pressure plates (1003).

10. An adjustable-gap kraft paper drying and setting machine according to claim 9, characterized in that: The outer side of the frame-shaped fixing plate (1001) is fixedly connected to the inner wall of the rectangular drying box (1). Multiple side-connecting long pressure plates (1003) are provided, and the multiple side-connecting long pressure plates (1003) are respectively distributed on both sides of the frame-shaped fixing plate (1001). Multiple ventilation holes (1004) are provided, and the multiple ventilation holes (1004) are distributed at the bottom of the side-connecting long pressure plates (1003). Multiple rounded corner ring blocks (1005) are provided, and the multiple rounded corner ring blocks (1005) are distributed at the bottom of the side-connecting long pressure plates (1003) aligned with the ventilation holes (1004).

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