A kind of gluing device for composite corrugated paper of moisture-proof carton

Abstract

The utility model discloses a kind of for the glue spreading device of moisture-proof carton's composite corrugated paper, comprising: glue pool;Glue roller and rotating assembly, rotating assembly drives glue roller to rotate;Glue scraping component, including scraper;Paper pressing assembly, including pressure roller, sliding seat, pull rope, fixed pulley and counterweight, pressure roller is connected with sliding seat, sliding seat and counterweight are slid in the top of glue pool, fixed pulley is set on glue pool, pull rope is wound in the top of fixed pulley and two ends are respectively connected with sliding seat and counterweight, the weight of counterweight is adjustable.The glue spreading device for the composite corrugated paper of moisture-proof carton is matched by fixed pulley and pull rope, the gravity of counterweight is converted to the tension of pressure roller upwards, by changing the weight of counterweight, the adjustment of the tension of pressure roller is realized, to adjust the pressure of pressure roller to corrugated core paper, since the weight of counterweight is fixed after adjustment, thereby it is favorable to guarantee the pressure of pressure roller under long-term use, improve gluing and forming quality.

Description

Technical Field

[0001] This utility model relates to the field of corrugated paper production technology, and in particular to a gluing device for composite corrugated paper used in moisture-proof cartons. Background Technology

[0002] Composite corrugated paper is an important material for making moisture-proof cardboard boxes. In its core process, the corrugated paper is formed by layering and connecting face paper, corrugated core paper and liner paper. The corrugated core paper is formed into a wavy structure by pressing the corrugations, and is sandwiched between the face paper and the liner paper to provide support and cushioning.

[0003] In the coating process of corrugated paper, a coating roller and a pressure roller are typically used together. Specifically, the grooves on the outer surface of the coating roller pick up the adhesive from the glue tank and rotate to the top. The pressure roller above then applies downward pressure to the corrugated core paper, causing the corrugations of the core paper to enter the grooves and contact the adhesive, thus achieving coating. Therefore, the pressure roller needs to apply precise pressure to the corrugated core paper. To facilitate pressure adjustment, existing technology typically connects the pressure roller to an elastic element such as a spring. Adjusting the spring force regulates the pressure. However, with increased use, the spring's elastic coefficient can change, and the spring itself can age. This leads to deviations in the pressure applied to the corrugated core paper during coating. Excessive pressure can cause deformation and damage to the corrugated core paper, while insufficient pressure prevents the corrugations from entering the grooves of the coating roller. These pressure deviations affect the final quality of the laminated corrugated paper.

[0004] Therefore, it is necessary to improve the gluing device for corrugated core paper. Utility Model Content

[0005] The purpose of this invention is to overcome the defects in the existing technology and provide a coating device for composite corrugated paper used in moisture-proof cartons that ensures stable pressure and adjustable pressure during long-term use.

[0006] To achieve the above-mentioned technical effects, the technical solution of this utility model is: a gluing device for composite corrugated paper used in moisture-proof cardboard boxes, comprising: glue tank; A glue-applying roller and a rotating assembly, wherein the glue-applying roller is axially horizontal and its bottom is located in the glue pool, and the outer circumferential edge of the glue-applying roller is provided with convex ridges and grooves that are distributed sequentially and spaced along its circumference and extend along its axial direction, and the rotating assembly drives the glue-applying roller to rotate around its own axis on the glue pool. A scraper assembly is disposed on the feed side of the coating roller and includes a scraper blade. The blade of the scraper blade extends along the axial direction of the coating roller and is used to abut against the side of the convex ridge facing away from the axis of the coating roller. The paper pressing assembly includes a pressure roller, a sliding seat, a pull rope, a fixed pulley, and a counterweight. The pressure roller rotates around its own axis above the glue-applying roller and is parallel to the axial direction of the glue-applying roller. The pressure roller is connected to the sliding seat. The sliding seat and the counterweight slide vertically above the glue pool. The fixed pulley is disposed on the glue pool. The pull rope is wound around the fixed pulley and extends downward at both ends to connect to the sliding seat and the counterweight, respectively. The weight of the counterweight is adjustable.

[0007] Preferably, in order to achieve stepless adjustment of the weight of the counterweight, the counterweight includes a liquid storage tank, which is used to fill the counterweight liquid to adjust the weight of the counterweight.

[0008] Preferably, in order to facilitate the adjustment of the pressure roller pressure while preventing the counterweight liquid from flowing to the outside, the pressure roller is a hollow pressure roller, and the paper pressing assembly also includes a liquid delivery unit, which is used to control the flow of the counterweight liquid between the liquid storage tank and the pressure roller.

[0009] Preferably, in order to realize the flow of counterweight liquid between the pressure roller and the storage tank, the liquid delivery unit includes a pumping pump and a replenishing pump. The input and output ends of the pumping pump are respectively connected to the storage tank and the pressure roller, and the input and output ends of the replenishing pump are respectively connected to the pressure roller and the storage tank.

[0010] Preferably, in order to facilitate the rotation of the pressure roller and to facilitate the adjustment of the pressure roller on the corrugated core paper, the output end of the liquid pump and the input end of the liquid replenishment pump are respectively connected to two concentric tubes. The two concentric tubes are sealed through both ends of the pressure roller, and each concentric tube is fixedly connected to a connecting pipe extending downward to a gap fit with the bottom of the inner wall of the pressure roller.

[0011] Preferably, in order to facilitate maintaining the connection between the liquid pump, the replenishment pump, the storage tank, and the pressure roller, both ends of the storage tank and the pressure roller are connected by flexible hoses, and the liquid pump, the pressure roller, the replenishment pump, and the storage tank are connected sequentially through the ends of the flexible hoses.

[0012] Preferably, to prevent the pull rope from detaching from the fixed pulley, the fixed pulley includes a wheel body whose axis is parallel to the axis of the glue-applying roller and rotates around its own axis, and a limiting plate disposed on the top of the wheel body. The outer circumferential edge of the wheel body is provided with an annular groove for the pull rope to pass through, and the limiting plate is fitted to the opening of the annular groove.

[0013] Preferably, in order to facilitate the replenishment of counterweight liquid into the storage tank after long-term operation, the top of the storage tank is provided with a liquid injection port, and the liquid injection port is detachably connected with a sealing plug.

[0014] Preferably, in order to facilitate the detection of the weight difference between the liquid storage tank and the pressure roller, the liquid storage tank is connected to a downward liquid level sensor to detect the liquid level in the liquid storage tank.

[0015] Preferably, in order to guide the transmission trajectory of the corrugated core paper, the feed trough and / or discharge side of the coating roller is provided with a guide roller, the axial direction of the guide roller is parallel to the axial direction of the coating roller, and the guide roller is rotatably arranged around its own axis.

[0016] In summary, compared with the prior art, the gluing device for composite corrugated paper in moisture-proof cardboard boxes of this utility model uses a combination of fixed pulleys and pull ropes to convert the weight of the counterweight into an upward pulling force on the pressure roller. By changing the weight of the counterweight, the pulling force of the pressure roller can be adjusted, thereby adjusting the pressure of the pressure roller on the corrugated core paper. Since the weight of the counterweight is fixed after adjustment, it is beneficial to ensure the pressure of the pressure roller under long-term use, thereby improving the gluing and forming quality. Attached Figure Description

[0017] Figure 1 This is a schematic diagram of the structure of this utility model; Figure 2 yes Figure 1 An explosion diagram; Figure 3 This is a schematic diagram of the paper pressing assembly of this utility model; Figure 4 yes Figure 3 An explosion diagram; Figure 5 This is a schematic diagram of the structure of the coating roller of this utility model; Figure 6 yes Figure 5 An explosion diagram; Figure 7 This is a cross-sectional structural schematic diagram of the present invention; Figure 8 yes Figure 7 The front view; Figure 9 This is a cross-sectional structural schematic diagram of the present invention from another perspective; In the diagram: 1. Glue tank; 11. Tank body; 111. Positioning hole; 12. Lower mounting base; 121. Lower insertion hole; 13. Upper mounting base; 131. Positioning post; 14. Fastening bolt; 15. Bracket; 16. Guide frame; 17. Guide rod; 18. Top plate; 2. Glue coating roller; 21. Outer roller; 211. Raised rib; 212. Groove; 213. Slide rail; 22. Sliding component; 23. Inner roller core; 231. Inner roller shaft; 232. Inner roller body; 2321. Inner hole; 233. Permanent magnet; 234. Inner column; 24. Cylinder cover; 241. Sealing tube; 242. Slot; 243. Positioning block; 25. Locking bolt; 3. Rotating assembly; 31. Rotary motor; 32. Drive gear; 33. Driven gear ring; 331. Protruding key; 4. Glue scraper assembly; 41. Scraper blade; 42. Telescopic unit; 421. Fixing frame; 422. First magnet; 423. Second magnet; 424. Slide rod; 5. Paper pressing assembly; 51. Pressure roller; 511. Inner roller; 512. Inner end cap; 513. Outer roller sleeve; 5131. 514. Positioning bar; 515. Positioning groove; 516. Bearing; 52. Sliding seat; 53. Pull rope; 54. Fixed pulley; 541. Wheel body; 5411. Annular groove; 542. Pulley seat; 5421. Limiting plate; 55. Liquid storage tank; 551. Tank body; 552. Tank cover; 553. Injection port; 554. Sealing plug; 555. Liquid level sensor; 556. Sliding sleeve; 56. Liquid pump; 57. Liquid replenishment pump; 58. Concentric tube; 581. Connecting tube; 59. Hose; 6. Guide roller. Detailed Implementation

[0018] The specific embodiments of this utility model will be further described below with reference to the accompanying drawings and examples. The following examples are only used to more clearly illustrate the technical solution of this utility model and should not be construed as limiting the scope of protection of this utility model.

[0019] like Figures 1-9 As shown, the adhesive coating device for composite corrugated paperboard for cardboard boxes of this utility model includes: Glue pool 1; The glue-applying roller 2 and the rotating assembly 3 are provided. The glue-applying roller 2 is horizontal in the axial direction and its bottom is located in the glue pool 1. The glue-applying roller 2 includes an outer roller 21. The rotating assembly 3 drives the outer roller 21 to rotate around its own axis on the glue pool 1. The outer edge of the outer roller 21 is provided with convex ribs 211 and grooves 212 that are distributed sequentially and spaced along its circumference and extend along its axial direction. The outer roller 21 also has a slide 213 that corresponds to and communicates with the bottom of the groove 212. The end of the slide 213 away from the bottom of the groove 212 extends radially to the inner wall of the outer roller 21. The slide 213 is slidably connected to a sliding member 22 that is sealed to it. The scraper assembly is located on the feed side of the coating roller 2 and includes a scraper 41. The blade of the scraper 41 extends along the axial direction of the coating roller 2 and is used to abut against the side of the protrusion 211 facing away from the axis of the coating roller 2. The paper pressing assembly 5 includes a pressure roller 51 located directly above the coating roller 2 and with its axis parallel to the axis of the coating roller 2. The pressure roller 51 rotates around its own axis and is in clearance fit with the coating roller 2 so that after applying pressure to the corrugated core paper, the corrugations of the corrugated core paper are brought close to the adhesive in the groove 212 at the top of the coating roller 2 one by one.

[0020] When the device is in use, the adhesive pool 1 stores adhesive. The outer roller 21 of the coating roller 2 rotates around its own axis, with its bottom below the surface of the adhesive liquid and its top above the surface of the adhesive liquid. The outer roller 21 is driven to rotate around its own axis by the rotating component 3. The outer roller 21 has a ring array of protruding ribs 211 and grooves 212 extending along the axial direction of the coating roller 2 on its circumferential outer edge. The protruding ribs 211 and grooves 212 are distributed at intervals. The protruding ribs 211 and the circumferential inner wall of the outer roller 21 enclose the grooves 212.

[0021] As the outer roller 21 rotates, the groove 212 and the protrusion 211 located below the adhesive liquid surface, after being dipped in adhesive, move above the axis of the outer roller 21. The blade of the scraper 41 scrapes off the adhesive on the side of the protrusion 211 away from the axis of the outer roller 21. At the same time, in the slide 213 connected to the groove 212, the sliding member 22, under the influence of gravity, moves downward closer to the axis of the outer roller 21. This causes some of the adhesive in the groove 212 to be sucked into the slide 213 through the bottom of the groove 212, thereby causing the adhesive to tend to flow towards the groove 212 and reducing the tendency of the adhesive to flow outward. In this way, the adhesive can be completely retained in the groove 212.

[0022] In this situation, when the groove 212 rotates to the top of the outer roller 21, it can prevent adhesive from flowing out of the groove 212 opening onto the end faces of the protrusions 211 on both sides of the groove 212. At the same time, the corrugated core paper passes between the coating roller 2 and the pressure roller 51. Under the action of the pressure roller 51, one of the corrugated core paper's peaks is pressed downward into the groove 212 to absorb the adhesive in the groove 212. This also prevents adhesive from adhering to the valleys on both sides of the peak and other positions on the end faces of the protrusions 211. In this way, the coating accuracy is ensured, and excessive adhesive is avoided from being absorbed in too many places, which would lead to excessive use of adhesive and reduce the final corrugated paper forming quality.

[0023] When the groove 212 rotates to the top of the outer roller 21, the adhesive in the groove 212 is dipped into one of the crests of the corrugated core paper. Then the groove 212 rotates downward, and the sliding member 22 moves away from the axis of the outer roller 21 under the influence of gravity, squeezing out the adhesive in the groove 212.

[0024] When the slider 22 rotates to the bottom, the bottom end of the slider 22 protrudes from the bottom of the groove 212, which can occupy part of the space inside the groove 212. This prevents the groove 212 from being dipped in too much adhesive at one time. On the one hand, it prevents too much adhesive from being in the groove 212, which could cause too much adhesive to overflow from the groove 212 after it rotates and leaves the adhesive liquid surface. On the other hand, it reduces the energy consumption required for the rotating component 3 to drive the outer roller 21 to rotate.

[0025] In order to increase the amount of adhesive entering the slide rail 213 from the groove 212 when the sliding member 22 moves toward the axis of the outer roller 21, thereby further suppressing the amount of adhesive overflowing from the groove 212 to the side of the ridge 211 away from the axis of the outer roller 21, in this utility model, the two sides of the slide rail 213 are close to the two end faces of the outer roller 21, and the sliding member 22 is a sliding plate that is sealed and fitted to the circumferential inner wall of the slide rail 213, so that the sliding member 22 can slide along the direction of the slide rail 213, that is, the radial direction of the outer roller 21.

[0026] A further improvement is that the coating roller 2 also includes an inner roller core 23 located inside the outer roller 21 and fixedly connected to the glue tank 1. The circumferential outer edge of the inner roller core 23 abuts against the side of the sliding member 22 away from the groove 212, and the axis of the inner roller core 23 is located directly below the axis of the outer roller 21.

[0027] The inner roller core 23 is a cylindrical roller core with its axis parallel to the axis of the outer roller 21. Since its axis is located directly below the axis of the outer roller 21, the inner roller core 23 is an eccentric axis relative to the outer roller 21. The outer edge of the inner roller core 23 abuts against the sliding member 22 to limit the range of motion of the sliding member 22 and prevent the sliding member 22 from disengaging from the slide rail 213. At the same time, by fixing the inner roller core 23 to the glue pool 1, it is convenient for the outer roller 21 to rotate around its own circumference outside the inner roller core 23.

[0028] A further improvement is that the inner roller core 23 and the sliding member 22 are magnetically attracted to each other, and the glue coating roller 2 and the glue pool 1 are detachably connected.

[0029] With this design, the inner roller core 23 and the sliding member 22 are magnetically attracted to each other, ensuring that the sliding member 22 is always in contact with the inner roller core 23. This prevents the sliding member 22 from being detached from the inner roller core 23 and the slide rail 213 due to gravity and centrifugal force. At the same time, the glue coating roller 2 and the glue pool 1 are detachably connected, which facilitates the replacement or maintenance of the glue coating roller 2.

[0030] To achieve the above design, in this utility model, as follows: Figure 2 As shown, the glue tank 1 includes a tank body 11 with an open top. The tank body 11 is generally rectangular, and its length direction is parallel to the axial direction of the outer roller 21. The interior of the tank body 11 is used to hold adhesive.

[0031] Both ends of the outer roller 21 are detachably and fixedly connected to roller covers 24. Specifically, the side of the roller cover 24 opposite to the outer roller 21 has a ring-shaped array of locking bolts 25. The roller cover 24 is fixedly connected to the outer roller 21 by the locking bolts 25. To achieve precise docking, the other side of the roller cover 24 has a ring-shaped array of positioning blocks 243, such as... Figure 5 and Figure 6 As shown, the positioning block 243 is inserted into the end of the groove 212, the inner roller core 23 is sandwiched between the two cylinder covers 24, and the side of the cylinder cover 24 facing away from the outer roller 21 is also integrally formed with a sealing tube 241, which is coaxial with the outer roller 21 and the cylinder cover 24.

[0032] like Figure 2 , Figure 5 and Figure 6 As shown, the inner roller core 23 includes an inner roller body 232 sandwiched between two cylinder covers 24. The inner roller body 232 is integrally connected with an inner roller shaft 231 that passes through it. The inner roller shaft 231 is sealed with sealing tubes 241 that pass through both ends. The two ends of the inner roller shaft 231 are detachably connected to the top of both ends of the pool body 11. The output end of the rotating component 3 is driven to one of the sealing tubes 241. In this way, the rotating component 3 can drive the sealing tube 241 to rotate, thereby driving the outer roller 21 to rotate. At the same time, the inner roller shaft 231 is detachably connected to the pool body 11, realizing the detachable connection between the coating roller 2 and the glue pool 1.

[0033] To achieve magnetic attraction between the inner roller core 23 and the sliding member 22, such as Figure 5 and Figure 6 As shown, the inner roller body 232 has annular mounting grooves spaced along its length. Two semi-circular permanent magnets 233 are arranged in the mounting grooves and are magnetically attracted to each other. The two permanent magnets 233 are combined to form a magnetic ring that matches the mounting groove. The sliding member 22 is a sliding plate made of ferritic stainless steel or martensitic stainless steel to ensure that the sliding member 22 and the two permanent magnets 233 are magnetically attracted to each other. In order to facilitate fixing the position of the two permanent magnets 233 on the inner roller body 232, an inner post 234 is fixed to the inner wall of the arc-shaped opening of the two permanent magnets 233. The bottom of the annular mounting groove has a through hole 2321. The inner post 234 is inserted into the inner hole 2321 to fix the position of the permanent magnets 233.

[0034] In order to achieve a detachable connection between the inner roller core 23 and the pool body 11, the two ends of the pool body 11 are provided with a lower mounting seat 12 and an upper mounting seat 13 that are inserted and fitted together in the vertical direction to form an installation opening. The circumferential inner wall of the installation opening is sealed and fitted with the circumferential outer edge of the inner roller shaft 231. The upper mounting seat 13 and the lower mounting seat 12 are fixed to the upper part of the pool body 11 by fastening bolts 14, which pass through the inner roller shaft 231.

[0035] More specifically, each end of the pool body 11 has two positioning holes 111 distributed along the width direction of the pool body 11 at its top. The lower mounting base 12 has lower insertion holes 121 at both ends, which are through holes. The upper mounting base 13 has positioning posts 131 extending downwards in the vertical direction at both ends below its lower ends. The positioning posts 131 are inserted into and fitted with the lower insertion holes 121 and the positioning holes 111. The end of the inner roller shaft 231 has a through hole, through which the shank of the fastening bolt 14 passes and is threaded to the top of the pool body 11.

[0036] With the above design, lower mounting seats 12 are placed at both ends of the pool body 11, aligning the lower insertion holes 121 with the positioning holes 111. The coating rollers 2 are then mounted on the two lower mounting seats 12, and an upper mounting seat 13 is placed on top. The two positioning pins 131 below the upper mounting seat 13 are sealed through the lower insertion holes 121 and then sealed into the positioning holes 111. Simultaneously, the lower mounting seats 12 and upper mounting seats 13 form a sealing mounting opening that fits snugly against the inner roller shaft 231. The inner roller shaft 231 is rotated, axially adjusting the through hole at its end to the vertical direction. Fastening bolts 14 are then screwed in from top to bottom, threading the ends of the bolts 14 into the pool body 11, thus completing the installation of the coating rollers 2. When disassembly is required, the fastening bolts 14 are unscrewed, and then the upper mounting seat 13 is removed, allowing the coating rollers 2 to be removed from the two lower mounting seats 12.

[0037] A further improvement is that the rotating assembly 3 includes a rotating motor 31, a driving gear 32, and a driven gear ring 33. The rotating motor 31 is fixed on the glue tank 1 and driven by the driving gear 32. The driving gear 32 meshes with the driven gear ring 33, and the driven gear ring 33 is radially fixedly connected to the sealing tube 241. Specifically, the driven gear ring 33 and the sealing tube 241 are provided with matching protrusions 331 and slots 242 that extend parallel to the axial direction of the glue coating roller 2.

[0038] More specifically, such as Figure 2 and Figure 4 As shown, in the rotating assembly 3, the rotating motor 31 is fixed to the outer side of the top of the pool body 11. Its output end is axially parallel to the length direction of the pool body 11 and is fixedly connected to the driving gear 32. The driven gear ring 33 meshes with the driving gear 32 and is provided with a protruding key 331 extending along the length direction of the pool body 11 on its axial inner wall. The circumferential outer edge of the sealing tube 241 is provided with a slot 242 that corresponds to and is adapted to the protruding key 331 for insertion and engagement. The end of the slot 242 away from the cylinder cover 24 extends to the end of the sealing tube 241.

[0039] With the above structure, during the installation of the coating roller 2, before mounting the inner roller shaft 231 on the two lower mounting seats 12, a driven gear ring 33 is pre-inserted into the end of one of the sealing tubes 241, so that the protruding key 331 on the driven gear ring 33 engages with the slot 242 on the sealing tube 241. The sealing tube 241 with the driven gear ring 33 is then brought closer to the driving gear 32, and the inner roller shaft 231 is clamped onto the two lower mounting seats 12. The mounting seat 13 is then installed, and the fastening bolt 14 is tightened, thereby completing the installation of the coating roller 2 and the assembly of the coating roller 2 with the rotating assembly 3. When the rotary motor 31 is started, it can drive the driving gear 32 to rotate, causing the driven gear ring 33 that meshes with it to rotate. The protruding key 331 of the driven gear ring 33 acts on the inner wall of the slot 242 of the sealing tube 241, causing the sealing tube 241 to rotate, which in turn drives the outer roller 21 to rotate.

[0040] A further improvement is that the scraper assembly 4 also includes a telescopic unit 42 for moving the scraper 41 closer to the glue coating roller 2. The telescopic unit 42 includes a fixed frame 421 connected to the glue tank 1. The telescopic unit 42 includes a first magnet 422 and a second magnet 423 that are distributed in a horizontal direction perpendicular to the axis of the glue coating roller 2 and are magnetically repulsive. The first magnet 422 and the second magnet 423 are respectively disposed on the fixed frame 421 and the scraper 41.

[0041] Specifically, such as Figure 2 , Figure 7 and Figure 8 As shown, in the scraper assembly 4, the blade of the scraper 41 faces the coating roller 2. The scraper 41 is located above the axis of the outer roller 21 and on the feeding side of the outer roller 21. The fixing frame 421 is an inverted U-shape and is located on the side of the scraper 41 that is away from the coating roller 2. The two ends of the fixing frame 421 are fixed above the two ends of the pool body 11. The back of the scraper 41 is also fixed with a slide rod 424 that extends parallel to the width of the pool body 11. The slide rod 424 seals through the fixing frame 421 and slides along the axial direction of the slide rod 424 with the fixing frame 421. The first magnet 422 is fixed on the fixing frame 421, and the second magnet 423 is fixed on the scraper 41. The first magnet 422 and the second magnet 423 are magnetically repulsive.

[0042] With the above structure, the first magnet 422 and the second magnet 423, which repel each other, cause the scraper 41 to tend to move towards the coating roller 2. The two ends of the scraper 41 are flush with the side of the two cylinder covers 24 that are away from the outer roller 21. The sliding direction of the scraper 41 is limited by the slide rod 424 to prevent the scraper 41 from shifting up or down or tilting. After the outer roller 21 rotates, the blade of the scraper 41 can abut against the side of the protrusion 211 away from the axis of the outer roller 21, scraping off the excess adhesive on the protrusion 211. The scraped adhesive falls back into the pool body 11, avoiding the waste of adhesive.

[0043] A further improvement is that both ends of the pressure roller 51 are provided with sliding seats 52, which slide vertically above the glue tank 1.

[0044] By setting up the sliding seat 52, the height position of the pressure roller 51 can be easily adjusted. On the one hand, this facilitates the threading of paper between the pressure roller 51 and the coating roller 2. On the other hand, it allows for raising the height position of the sliding seat 52 when replacing or maintaining the coating roller 2, thus creating space for disassembly, maintenance, or replacement of the coating roller 2. During the coating process, the pressure roller 51 applies downward pressure to the corrugated core paper, causing the corrugated core paper's peaks to enter the grooves 212 and pick up the adhesive within the grooves 212. Meanwhile, the corrugated core paper's valleys contact the raised edges 211, preventing excessive adhesive contamination. Combined with the rotation of the outer roller 21, the corrugated core paper's peaks contact the adhesive in each groove 212 one by one, completing the coating process.

[0045] More specifically, the paper pressing assembly 5 includes a pressure roller 51, a sliding seat 52, a pull rope 53, a fixed pulley 54, and a counterweight. The pressure roller 51 rotates around its own axis above the glue coating roller 2 and is parallel to the axial direction of the glue coating roller 2. The pressure roller 51 is connected to the sliding seat 52. The sliding seat 52 and the counterweight slide vertically above the glue pool 1. The fixed pulley 54 is disposed on the glue pool 1. The pull rope 53 is wound around the fixed pulley 54 and extends downward at both ends to be connected to the sliding seat 52 and the counterweight, respectively. The weight of the counterweight is adjustable.

[0046] This design allows for adjustable counterweight weight. By adjusting its own weight, the counterweight applies an upward pull to the pressure roller 51 via the pull rope 53 and fixed pulley 54. The magnitude of the pull is directly proportional to the counterweight weight. Adjusting the weight of the counterweight adjusts the pull on the pressure roller 51, thereby adjusting the pressure of the pressure roller 51 on the corrugated core paper below. This avoids excessive pressure that could damage the corrugated core paper structure, while also preventing insufficient pressure that would prevent the corrugated core paper's crests from being pressed into the groove 212 to contact the adhesive. Compared to the existing technology using spring-loaded... The pressure on the corrugated core paper is adjusted by elastic elements such as springs. In this structure, the pressure on the corrugated core paper comes from the gravity difference between the pressure roller 51 and the counterweight. The tension is transmitted through the pull rope 53, which avoids the error caused by the aging of the spring. By increasing the weight of the counterweight, the pressure of the pressure roller 51 on the corrugated core paper can be reduced. By decreasing the weight of the counterweight, the pressure of the pressure roller 51 on the corrugated core paper can be increased. This allows for more convenient, intuitive and precise adjustment of the pressure on the corrugated core paper, ensuring the forming quality of the composite corrugated paper.

[0047] To achieve adjustable weight of the counterweight, the counterweight includes a liquid reservoir 55. The liquid reservoir 55 is used to hold counterweight liquid to adjust the weight of the counterweight. With this design, by adjusting the amount of counterweight liquid in the liquid reservoir 55, the weight of the counterweight can be steplessly adjusted, thereby achieving stepless adjustment of the pressure of the pressure roller 51 on the corrugated core paper. It should be noted that the counterweight liquid in the liquid reservoir 55 can be of various types, such as common water or lubricating oil.

[0048] A further improvement is that the pressure roller 51 is a hollow pressure roller 51, and the paper pressing assembly 5 also includes a liquid delivery unit, which is used to control the flow of counterweight liquid between the liquid storage tank 55 and the pressure roller 51.

[0049] With the above design, the flow of counterweight liquid between the storage tank 55 and the pressure roller 51 is controlled by the liquid delivery unit. The weight difference between the storage tank 55 and the pressure roller 51 is adjusted, thereby adjusting the pressure of the pressure roller 51 on the corrugated core paper. This ensures that when the pressure roller 51 acts on the corrugated core paper, the corrugated peaks of the corrugated core paper can enter the groove 212 of the outer roller 21 to pick up the adhesive in the groove 212, while preventing the corrugated valleys of the corrugated core paper from entering the groove 212. Specifically, the infusion unit has two operating modes. In the first operating mode, the infusion unit inputs the counterweight liquid from the storage tank 55 into the pressure roller 51, making the weight of the pressure roller 51 greater than the weight of the storage tank 55, thus increasing the weight difference between the pressure roller 51 and the storage tank 55, thereby increasing the pressure of the pressure roller 51 on the corrugated core paper. In the second operating mode, the infusion unit delivers the counterweight liquid in the pressure roller 51 into the storage tank 55, thereby reducing the pressure of the pressure roller 51 on the corrugated core paper. When the infusion unit has completely drawn the counterweight liquid in the pressure roller 51 into the storage tank 55, the weight of the storage tank 55 is greater than the weight of the pressure roller 51, causing the pressure roller 51 and the sliding seat 52 to move upward, thereby increasing the gap between the pressure roller 51 and the coating roller 2, facilitating the disassembly, replacement, or other maintenance operations of the coating roller 2.

[0050] More specifically, the infusion unit includes a pump 56 for drawing liquid and a pump 57 for replenishing liquid. The input and output ends of the pump 56 are connected to the storage tank 55 and the pressure roller 51, respectively, while the input and output ends of the pump 57 are connected to the pressure roller 51 and the storage tank 55, respectively. Thus, the pump 56 can input the counterweight liquid from the storage tank 55 into the pressure roller 51, making the weight of the pressure roller 51 greater than the weight of the storage tank 55. This reduces the tension on the pressure roller 51, increasing the pressure on the corrugated core paper as more counterweight liquid is input into it. Conversely, the pump 57 can transfer the counterweight liquid from the pressure roller 51 to the storage tank 55, increasing the tension on the pressure roller 51 and reducing the pressure on the corrugated core paper.

[0051] A further improvement is that the output end of the pump 56 and the input end of the replenishment pump 57 are respectively connected to two concentric tubes 58. The two concentric tubes 58 are sealed through both ends of the pressure roller 51. Each concentric tube 58 is fixedly connected to a connecting pipe 581 that extends downward to fit the bottom of the inner wall of the pressure roller 51 with a gap. Both ends of the storage tank 55 and the pressure roller 51 are connected to hoses 59. The pump 56, the pressure roller 51, the replenishment pump 57 and the storage tank 55 are connected end to end through the hoses 59.

[0052] With this design, the deformation of the hose 59 itself facilitates the lifting and lowering of the pressure roller 51 and the liquid storage tank 55, and the pump 56 and the replenishment pump 57 can maintain communication with the inside of the pressure roller 51 and the liquid storage tank 55 through the hose 59.

[0053] Specifically, such as Figure 2-4 As shown, in this utility model, the pressure roller 51 includes an inner roller 511 and inner end caps 512 fixed at both ends of the inner roller 511. The inner roller 511 and the inner end caps 512 are both arranged in a ring array along the outer periphery of the inner roller 511 and the inner end caps 512, with positioning grooves 514 extending along the length direction parallel to the pool body 11. The positioning grooves 514 are through grooves, and the positioning grooves 514 on the inner roller 511 and the inner end caps 512 are connected in a one-to-one correspondence. An elastic outer roller sleeve 513 is provided over the inner roller 511 and the inner end caps 512. The inner periphery of the outer roller sleeve 513 is fixed with a positioning strip 5131 that is adapted to the positioning grooves 514 to ensure a radially relative fixed connection between the outer roller sleeve 513 and the inner roller 511 and the inner end caps 512.

[0054] Preferably, the outer roller sleeve 513 is a sponge roller sleeve. Compared with the use of rubber roller sleeves, sponge roller sleeves have higher elasticity and can more gently press the flute valleys when applied to the corrugated core paper, avoiding the corrugated core paper from breaking due to stress concentration.

[0055] Two concentric tubes 58 are sealed and welded together at their ends, which pass through the two inner end caps 512 and extend to the inner roller 511. This arrangement ensures that the openings of the two concentric tubes 58 face away from each other, while their sealed ends are connected as one unit. Figure 9 As shown, the portions of the two concentric tubes 58 located inside the inner roller 511 are both fixedly connected to connecting tubes 581 that extend downward to fit with the inner bottom wall of the inner roller 511 and are distributed along the axial direction of the inner roller 511.

[0056] The sliding seats 52 at both ends of the inner roller 511 are connected to the concentric tube 58 and the inner end cover 512. Specifically, the concentric tube 58 is fixedly inserted through the sliding seat 52, that is, the sliding seat 52 is fixedly sleeved on the outside of the concentric tube 58. The sliding seat 52 can drive the concentric tube 58 to move up and down. The sliding seat 52 is also provided with a bearing 515. The inner ring of the bearing 515 is fixedly connected to the inner end cover 512, and the outer ring is fixedly connected to the sliding seat 52. In this way, the bearing 515 not only facilitates the movement of the inner end cover 512 and the inner roller 511 with the sliding seat 52, but also allows the inner end cover 512 and the inner roller 511 to rotate relative to the sliding seat 52. The opposite ends of the two concentric tubes 58 are connected to the pumping pump 56 and the replenishing pump 57 respectively through two hoses 59, so that the pumping pump 56 can input the counterweight liquid in the storage tank 55 into the pressure roller 51, and the replenishing pump 57 can draw the counterweight liquid in the pressure roller 51 and transport it into the storage tank 55, thereby adjusting the weight of the storage tank 55 and the pressure roller 51.

[0057] In order to enable the sliding seat 52 to move in the vertical direction, a U-shaped bracket 15 is fixed above both ends of the pool body 11. The top of the bracket 15 is a guide frame 16, which is set vertically. The sliding seat 52 slides in the vertical direction on the inside of the guide frame 16.

[0058] In this invention, the liquid storage tank 55 includes a box body 551 with an open top and a box cover 552 welded and fixed to the top of the box body 551. The liquid pump 56 and the liquid replenishment pump 57 are respectively connected to the bottom of both ends of the box body 551 through two hoses 59. The four corners of the box body 551 are integrally formed with sliding sleeves 556 extending in the vertical direction. Two guide rods 17 extending in the vertical direction are fixed at both ends of the pool body 11. The guide rods 17 and the sliding sleeves 556 are slidably engaged in a one-to-one correspondence to achieve the liquid storage tank 55 sliding above the pool body 11 in the vertical direction. The top ends of the two guide rods 17 are fixedly connected and supported by a top plate 18 to prevent the guide rods 17 from tilting.

[0059] Fixed pulleys 54 are provided above both the guide frame 16 and the top plate 18. The middle of the pull rope 53 is horizontally arranged and wound around the two fixed pulleys 54. One end of the pull rope 53 extends vertically downward, passes through the top side wall of the guide frame 16 and connects to the sliding seat 52. The other end of the pull rope 53 extends vertically downward, passes through the top plate 18 and is fixedly connected to the box cover 552. In this way, the liquid storage tank 55 and the pressure roller 51 are connected by the pull rope 53 and the two fixed pulleys 54. The amount of counterweight liquid between the pressure roller 51 and the liquid storage tank 55 is adjusted by the liquid pump 56 and the liquid replenishment pump 57, thereby adjusting the weight of the two and realizing the precise adjustment of the pressure of the pressure roller 51 on the corrugated core paper.

[0060] A further improvement is that a detection port is provided on the cover 552, and a downward liquid level sensor 555 is installed at the detection port to detect the liquid level in the storage tank 55.

[0061] With the above design, the counterweight liquid in the pressure roller 51 is filled into the storage tank 55 by the replenishment pump 57. The liquid level sensor 555 detects the liquid level in the storage tank 55 at this time, thereby determining the total amount of counterweight liquid in the storage tank 55 and the pressure roller 51. Then, the liquid pump 56 extracts the counterweight liquid in the storage tank 55 and delivers it to the pressure roller 51. The liquid level sensor 555 detects the liquid level, which facilitates the determination of the amount of counterweight liquid in the storage tank 55 and the pressure roller 51 respectively. This allows for the determination of the various weights of the storage tank 55 and the pressure roller 51, which is beneficial for the precise adjustment and control of the pressure of the pressure roller 51 on the corrugated core paper.

[0062] A further improvement is that a liquid inlet 553 is provided on the top of the liquid storage tank 55, and a sealing plug 554 is detachably connected to the liquid inlet 553. Specifically, the liquid inlet 553 is located on the tank cover 552, and the sealing plug 554 is threadedly connected to the inner wall of the liquid inlet 553. This design allows for easy replenishment of counterweight liquid into the liquid storage tank 55 after long-term operation of the device by opening the liquid inlet 553. This prevents the counterweight liquid from gradually decreasing due to leakage, which could reduce the total amount of counterweight liquid in the pressure roller 51 and the liquid storage tank 55 to the point where the pumping pump 56 and the replenishing pump 57 cannot draw counterweight liquid. In other words, by replenishing the counterweight liquid, it is ensured that the counterweight liquid can flow smoothly between the liquid storage tank 55 and the pressure roller 51 when the pumping pump 56 and the replenishing pump 57 are running.

[0063] A further improvement is that the fixed pulley 54 includes a wheel body 541 whose axis is parallel to the axis of the coating roller 2 and rotates around its own axis, and a limiting plate 5421 disposed on the top of the wheel body 541. The outer circumferential edge of the wheel body 541 is provided with an annular groove 5411 for the pull rope 53 to be wound and passed through, and the limiting plate 5421 fits into the groove opening of the annular groove 5411.

[0064] Specifically, the fixed pulley 54 also includes a pulley seat 542, and a limiting plate 5421 is integrally formed on the top of the pulley seat 542. The wheel body 541 rotates around its own axis on the pulley seat 542. For the two fixed pulleys 54 above any end of the pool body 11, one of the pulley seats 542 is fixed above the guide frame 16, and the other pulley seat 542 is fixed above the top plate 18. The two fixed pulleys 54 are located at the same height, so that the middle of the pull rope 53 remains horizontal. The annular groove 5411 on the wheel body 541 facilitates the guidance of the pull rope 53. The limiting plate 5421 on the top of the wheel body 541 prevents the pull rope 53 from detaching from the wheel body 541.

[0065] A further improvement is that a guide roller 6 is provided on the feed side and / or discharge side of the coating roller 2. The axial direction of the guide roller 6 is parallel to the axial direction of the coating roller 2, and the guide roller 6 is rotatably arranged around its own axis.

[0066] Specifically, guide rollers 6 are provided on both the feed side and the discharge side of the coating roller 2. The two guide rollers 6 are located between the two supports 15. By setting the two guide rollers 6, the transmission of the corrugated core paper is facilitated. In conjunction with the pressure roller 51, pressure is applied to the coating roller 2, so that the corrugations of the corrugated core paper can enter the groove 212 to pick up the adhesive, thereby successfully completing the coating operation.

[0067] The above description is only a preferred embodiment of the present utility model. It should be noted that for those skilled in the art, several improvements and modifications can be made without departing from the technical principles of the present utility model, and these improvements and modifications should also be considered within the protection scope of the present utility model.

Claims

1. A gluing device for composite corrugated paper used in moisture-proof cardboard boxes, characterized in that, include: glue tank; A glue-applying roller and a rotating assembly, wherein the glue-applying roller is axially horizontal and its bottom is located in the glue pool, and the outer circumferential edge of the glue-applying roller is provided with convex ridges and grooves that are distributed sequentially and spaced along its circumference and extend along its axial direction, and the rotating assembly drives the glue-applying roller to rotate around its own axis on the glue pool. A scraper assembly is disposed on the feed side of the coating roller and includes a scraper blade. The blade of the scraper blade extends along the axial direction of the coating roller and is used to abut against the side of the convex ridge facing away from the axis of the coating roller. The paper pressing assembly includes a pressure roller, a sliding seat, a pull rope, a fixed pulley, and a counterweight. The pressure roller rotates around its own axis above the glue-applying roller and is parallel to the axial direction of the glue-applying roller. The pressure roller is connected to the sliding seat. The sliding seat and the counterweight slide vertically above the glue pool. The fixed pulley is disposed on the glue pool. The pull rope is wound around the fixed pulley and extends downward at both ends to connect to the sliding seat and the counterweight, respectively. The weight of the counterweight is adjustable.

2. The gluing device for composite corrugated paper used in moisture-proof cardboard boxes according to claim 1, characterized in that: The counterweight includes a liquid storage tank for holding counterweight liquid to adjust the weight of the counterweight.

3. The gluing device for composite corrugated paper used in moisture-proof cardboard boxes according to claim 2, characterized in that: The pressure roller is a hollow pressure roller, and the paper pressing assembly also includes a liquid delivery unit, which is used to control the flow of counterweight liquid between the liquid storage tank and the pressure roller.

4. The gluing device for composite corrugated paper used in moisture-proof cardboard boxes according to claim 3, characterized in that: The infusion unit includes a pump for drawing fluid and a pump for replenishing fluid. The input and output ends of the pump for drawing fluid are connected to the storage tank and the pressure roller, respectively. The input and output ends of the pump for replenishing fluid are connected to the pressure roller and the storage tank, respectively.

5. The adhesive coating device for composite corrugated paper used in moisture-proof cardboard boxes according to claim 4, characterized in that: The output end of the pump and the input end of the replenishment pump are respectively connected to two concentric tubes. The two concentric tubes are sealed through both ends of the pressure roller, and each concentric tube is fixedly connected to a connecting pipe that extends downward to fit the bottom of the inner wall of the pressure roller with a gap.

6. The gluing device for composite corrugated paper used in moisture-proof cardboard boxes according to claim 4, characterized in that: Both ends of the liquid storage tank and the pressure roller are connected to flexible hoses, and the liquid pump, the pressure roller, the liquid replenishment pump and the liquid storage tank are connected in sequence through the ends of the flexible hoses.

7. The gluing device for composite corrugated paper for moisture-proof cartons according to any one of claims 1-6, characterized in that: The fixed pulley includes a wheel body whose axis is parallel to the axis of the glue-applying roller and rotates around its own axis, and a limiting plate disposed on the top of the wheel body. The outer circumferential edge of the wheel body is provided with an annular groove for the pull rope to pass through, and the limiting plate is fitted to the opening of the annular groove.

8. The gluing device for composite corrugated paper for moisture-proof cartons according to any one of claims 2-6, characterized in that: The top of the liquid storage tank is provided with a liquid injection port, which is detachably connected to a sealing plug.

9. The gluing device for composite corrugated paper for moisture-proof cartons according to any one of claims 2-6, characterized in that: The storage tank is connected to a downward-facing liquid level sensor to detect the liquid level inside the storage tank.

10. The gluing device for composite corrugated paper for moisture-proof cartons according to any one of claims 1-6, characterized in that: The glue-coating roller is provided with a guide roller on its feed trough and / or discharge side. The axial direction of the guide roller is parallel to the axial direction of the glue-coating roller, and the guide roller is rotatably arranged around its own axis.

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