A continuous coating structure for environmentally friendly corrugated paper
By introducing an electric push rod and pressure sensor to adjust the scraper in the corrugated paper coating structure, combined with an infrared drying lamp, the problem of uneven coating of low-viscosity water-based adhesive was solved, improving the pass rate of corrugated paper and reducing energy consumption.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- 杭州永晶科技有限公司
- Filing Date
- 2025-07-11
- Publication Date
- 2026-06-30
AI Technical Summary
Existing corrugated paper coating structures are poorly adapted to low-viscosity water-based adhesives, leading to frequent problems such as uneven adhesive penetration and edge overflow, resulting in a high scrap rate for paperboard.
An environmentally friendly continuous coating structure for corrugated paper is adopted. It is installed above the corrugated paper conveyor via a base. The doctor blade is dynamically adjusted using an electric push rod and a pressure sensor. Combined with infrared drying lamps, the adhesive is evenly coated and dried, which can adapt to corrugated paper of different thicknesses.
It improves the adaptability of low-viscosity water-based adhesives, reduces uneven adhesive penetration and edge overflow problems, increases the pass rate of corrugated paper, and reduces subsequent heating energy consumption.
Smart Images
Figure CN224423348U_ABST
Abstract
Description
Technical Field
[0001] This application relates to the field of corrugated cardboard production equipment technology, and in particular to an environmentally friendly continuous coating structure for corrugated paper. Background Technology
[0002] Corrugated paper is a sheet-like material made by bonding linerboard and corrugated paper formed by corrugating rollers. It is generally divided into single-wall corrugated paperboard and double-wall corrugated paperboard. Industry statistics in the past three years show that the scrap rate of paperboard due to glue coating defects in the coating process is as high as 5%-8%, with annual loss costs exceeding 2 billion yuan. With increasingly stringent environmental regulations, the demand for more environmentally friendly coating structures in related industries is constantly increasing.
[0003] The existing corrugated paper coating structure usually involves first applying glue to the corrugated paper and then spreading the glue evenly with a fixed scraper. However, this method is not well-suited for low-viscosity water-based glues, resulting in frequent problems such as uneven glue penetration and glue overflow at the edges, leading to a high scrap rate for paperboard.
[0004] Therefore, this application provides an environmentally friendly continuous coating structure for corrugated paper. Utility Model Content
[0005] To address the shortcomings of existing technologies, this application provides an environmentally friendly continuous coating structure for corrugated paper, which overcomes the deficiencies of existing technologies. It aims to solve the problem that existing corrugated paper coating structures typically involve first applying glue to the corrugated paper and then spreading the glue evenly with a fixed scraper. However, this method has poor adaptability to low-viscosity water-based glues, leading to frequent problems such as uneven glue penetration and glue overflow at the edges, resulting in a high scrap rate for paperboard.
[0006] To achieve the above objectives, this application provides the following technical solution: an environmentally friendly continuous coating structure for corrugated paper, comprising two sets of bases, each set of bases having a support frame fixedly installed at its top, a top box installed on the top of each set of support frames, two sets of electric push rods (first type) fixedly installed at the bottom of the top box, a blade holder installed at the output end of each set of electric push rods (first type), a main scraper fixedly installed at the bottom of the blade holder, electric push rods (second type) symmetrically installed at the top of each set of bases, edge scrapers installed at the telescopic ends of each set of electric push rods (second type), a pressure relief groove formed between the edge scraper and the main scraper, an adhesive supply mechanism provided at the bottom of the top box, a liner roller provided between the adhesive supply mechanism and the main scraper, two pressure sensors provided at the bottom of the liner roller, the two pressure sensors being far apart, a controller fixedly installed on the outer surface of the base, the controller being electrically connected to the electric push rods (first type), electric push rods (second type), and pressure sensors.
[0007] By adopting the above technical solution, the base is installed above the corrugated paper conveyor. When the corrugated paper conveyor transports the corrugated paper, the glue is delivered to the top of the corrugated paper through the glue supply mechanism. When the corrugated paper moves to the bottom of the liner roller, the pressure sensor at the bottom of the liner roller feeds back to the controller. If the glue thickness of the corrugated paper exceeds the preset value, the electric push rod two retracts, driving the edge scraper to retreat. A pressure relief groove is formed between the edge scraper and the main scraper. The main scraper scrapes the glue in the middle of the corrugated paper evenly, and the pressure relief groove reduces the glue pressure at the edge, reducing glue accumulation and squeezing at the edge, and preventing glue overflow. Through the controller, electric push rod one, electric push rod two, pressure sensor and other components, the efficiency of dynamic adjustment response is improved, the adaptability to low viscosity water-based glue is improved, the occurrence of problems such as uneven glue penetration and edge glue overflow is reduced, and the qualified rate of corrugated paper is improved.
[0008] As a preferred technical solution of this application, a lamp holder is fixedly installed on the top of the two sets of bases. The lamp holder is located on the side of the main scraper away from the adhesive supply mechanism, and several sets of infrared drying lamp tubes are fixedly installed on the bottom of the lamp holder.
[0009] By adopting the above technical solution, after the corrugated paper is uniformly coated with glue, as the cardboard moves, the infrared drying lamp emits infrared rays to dry the glued area, effectively reducing the subsequent heating energy consumption of the corrugated paper.
[0010] As a preferred technical solution of this application, the two sides of the liner roller are equipped with fixed frames, and the bottom of the top box is equipped with two sets of electric push rods three. The two sets of electric push rods three are located between the electric push rod one and the adhesive supply mechanism, and the telescopic ends of the two sets of electric push rods three are installed with the corresponding fixed frames.
[0011] By adopting the above technical solution, the height of the liner roller can be adjusted through the telescopic movement of the electric push rod three, which is beneficial for adapting to corrugated paper of different thicknesses.
[0012] As a preferred embodiment of this application, the adhesive supply mechanism includes an adhesive storage tank, which is fixedly installed inside the top box. A screw pump is fixedly installed inside the adhesive storage tank. Two sets of rectangular blocks are fixedly installed at the bottom of the top box, with the two sets of rectangular blocks located directly below the adhesive storage tank. An insulation pipe is fixedly installed between the two sets of rectangular blocks. Several sets of adhesive outlets are installed at the bottom of the insulation pipe. The screw pump is installed inside the adhesive storage tank, and a delivery pipe connects the screw pump to the insulation pipe.
[0013] By adopting the above technical solution, the glue in the storage tank is transported to the insulation pipe through the delivery pipe by the screw pump, and then flows out evenly from the glue outlet, which helps to provide a stable glue supply during the movement of corrugated paper.
[0014] As a preferred technical solution of this application, an electric heating layer is fixedly installed on the outer wall of the glue storage tank, and the outer wall of the electric heating layer is wrapped with a heat insulation layer.
[0015] By adopting the above technical solution, the heating layer can heat the glue in the storage tank, keeping the glue within a suitable temperature range and preventing it from solidifying due to low temperature. The insulation layer can effectively reduce heat loss and lower energy consumption.
[0016] As a preferred technical solution of this application, the base has several sets of mounting holes inside.
[0017] By adopting the above technical solution, the base can be easily connected to the corrugated paper conveyor through the mounting holes, which improves its practicality during use.
[0018] As a preferred technical solution of this application, an observation window is fixedly installed at the bottom of the glue storage tank, and a feeding pipe is fixedly installed at the top of the glue storage tank.
[0019] By adopting the above technical solution, operators can intuitively observe the remaining amount of glue in the storage tank through the observation window. When the glue is insufficient, glue can be added in time through the feeding pipe, which is beneficial to the continuity of production.
[0020] As a preferred technical solution of this application, the outer surface of the liner roller is covered with a polyurethane layer.
[0021] By adopting the above technical solution, the polyurethane layer has good wear resistance, elasticity and corrosion resistance, which improves the flexibility and service life of the liner roller during the process of applying glue and scraping evenly when in contact with corrugated paper.
[0022] The beneficial effects of this application are:
[0023] 1. The base is installed above the corrugated paper conveyor. When the corrugated paper conveyor transports the corrugated paper, the glue is delivered to the top of the corrugated paper through the glue supply mechanism. When the corrugated paper moves to the bottom of the liner roller, the pressure sensor at the bottom of the liner roller feeds back to the controller. If the glue thickness of the corrugated paper exceeds the preset value, the electric push rod two retracts, driving the edge scraper to retreat. A pressure relief groove is formed between the edge scraper and the main scraper. The main scraper scrapes the glue in the middle of the corrugated paper evenly. The pressure relief groove reduces the glue pressure at the edge, reducing glue accumulation and squeezing at the edge, and preventing glue overflow. Through the controller, electric push rod one, electric push rod two, pressure sensor and other components, the efficiency of dynamic adjustment response is improved, the adaptability to low viscosity water-based glue is improved, the occurrence of problems such as uneven glue penetration and edge glue overflow is reduced, and the qualification rate of corrugated paper is improved.
[0024] 2. After the corrugated paper is evenly coated with glue, as the cardboard moves, the infrared drying lamp emits infrared rays to dry the glued area, effectively reducing the energy consumption of subsequent heating of the corrugated paper. Attached Figure Description
[0025] Figure 1 This is a schematic diagram of the overall structure of this application;
[0026] Figure 2 This is a partial structural diagram of this application;
[0027] Figure 3 A schematic diagram of the adhesive supply mechanism;
[0028] Figure 4 This is a side view structural diagram of this application.
[0029] In the diagram: 1. Base; 2. Stand; 3. Top box; 4. Electric push rod one; 5. Knife holder; 6. Main scraper; 7. Electric push rod two; 8. Edge scraper; 9. Pressure relief groove; 10. Electric push rod three; 11. Fixing frame; 12. Liner roller; 13. Adhesive supply mechanism; 1301. Glue storage tank; 1302. Screw pump; 1303. Rectangular block; 1304. Insulation pipe; 1305. Glue outlet; 1306. Conveying pipe; 14. Controller; 15. Lamp holder; 16. Infrared drying lamp; 18. Heating layer; 19. Insulation layer; 20. Mounting hole; 21. Observation window; 22. Feeding pipe. Detailed Implementation
[0030] The technical solutions of the embodiments of this application will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this application, and not all embodiments. Based on the embodiments of this application, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of this application.
[0031] Reference Figure 1-4An environmentally friendly continuous coating structure for corrugated paper includes two sets of bases 1. A support frame 2 is fixedly installed at the top of each set of bases 1. A top box 3 is installed on the top of each set of support frames 2. Two sets of electric push rods 4 are fixedly installed at the bottom of the top box 3. A blade holder 5 is installed at the output end of each set of electric push rods 4. A main scraper 6 is fixedly installed at the bottom of the blade holder 5. Two electric push rods 7 are symmetrically installed at the top of each set of bases 1. An edge scraper 8 is installed at the telescopic end of each set of electric push rods 7. A pressure relief groove 9 is formed between the edge scraper 8 and the main scraper 6. An adhesive supply mechanism 13 is provided at the bottom of the top box 3. A liner roller 12 is provided between the adhesive supply mechanism 13 and the main scraper 6. Two sets of pressure sensors are provided at the bottom of the liner roller 12, and the two sets of pressure sensors are far apart. A controller 14 is fixedly installed on the outer surface of the base 1. The controller 14 is electrically connected to the electric push rod 4, the electric push rod 7, and the pressure sensors. Fixing frames 11 are installed on both sides of the liner roller 12. Two sets of electric push rods 10 are installed at the bottom of the top box 3. The two sets of electric push rods 10 are located between the electric push rod 4 and the adhesive supply mechanism 13. The telescopic ends of the two sets of electric push rods 10 are installed with the corresponding fixing frames 11.
[0032] The base 1 is installed above the corrugated paper conveyor. When the corrugated paper conveyor transports the corrugated paper, the glue supply mechanism 13 delivers glue to the top of the corrugated paper. When the corrugated paper moves below the liner roller 12, the pressure sensor at the bottom of the liner roller 12 sends feedback to the controller 14. If the glue thickness on the corrugated paper exceeds the preset value, the electric push rod 7 retracts, causing the edge scraper 8 to retract. A pressure relief groove 9 is formed between the edge scraper 8 and the main scraper 6. The main scraper 6 scrapes the glue evenly in the middle of the corrugated paper, and the glue flows through the pressure relief groove 9. By reducing the pressure of the adhesive at the edges, the accumulation and squeezing of adhesive towards the edges are reduced, thus preventing adhesive overflow. Through components such as controller 14, electric push rod 1 4, electric push rod 2 7, and pressure sensor, the efficiency of dynamic adjustment response is improved, the adaptability to low viscosity water-based adhesives is enhanced, and problems such as uneven adhesive penetration and edge overflow are reduced, thereby increasing the pass rate of corrugated paper. The height of the liner roller 12 can be adjusted by the telescopic movement of electric push rod 3 10, which is beneficial for adapting to corrugated paper of different thicknesses.
[0033] Reference Figure 1-3A lamp holder 15 is fixedly installed at the top of the two bases 1. The lamp holder 15 is located on the side of the main scraper 6 away from the glue supply mechanism 13. Several sets of infrared drying lamp tubes 16 are fixedly installed at the bottom of the lamp holder 15. The glue supply mechanism 13 includes a glue storage tank 1301, which is fixedly installed inside the top box 3. A screw pump 1302 is fixedly installed inside the glue storage tank 1301. Two sets of rectangular blocks 1303 are fixedly installed at the bottom of the top box 3. The two sets of rectangular blocks 1303 are located directly below the glue storage tank 1301. A heat insulation pipe 1304 is fixedly installed between the two sets of rectangular blocks 1303. Several sets of glue outlets 1305 are installed at the bottom of the heat insulation pipe 1304. A screw pump 1302 is installed inside the glue storage tank 1301. A delivery pipe 1306 is connected between the screw pump 1302 and the heat insulation pipe 1304.
[0034] After the corrugated paper is evenly coated with glue, as the cardboard moves, the infrared drying lamp 16 emits infrared rays to dry the coated area, effectively reducing the energy consumption of subsequent heating of the corrugated paper. The glue in the glue storage tank 1301 is transported to the heat preservation pipe 1304 through the delivery pipe 1306 by the screw pump 1302, and then flows out evenly from the glue outlet 1305, which helps to provide a stable glue supply during the movement of the corrugated paper.
[0035] Reference Figure 2-4 An electric heating layer 18 is fixedly installed on the outer wall of the glue storage tank 1301, and an insulation layer 19 is wrapped around the outer wall of the electric heating layer 18. An observation window 21 is fixedly installed at the bottom of the glue storage tank 1301, and a feeding pipe 22 is fixedly installed at the top of the glue storage tank 1301. The electric heating layer 18 can heat the glue in the glue storage tank 1301 to keep the glue within a suitable temperature range and prevent the glue from solidifying due to low temperature. The insulation layer 19 can effectively reduce heat loss and reduce energy consumption. Through the observation window 21, the operator can intuitively observe the remaining amount of glue in the glue storage tank 1301. When the glue is insufficient, glue can be added in time through the feeding pipe 22, which is beneficial to the continuity of production.
[0036] Reference Figure 1-3 The base 1 has several sets of mounting holes 20 inside; the outer surface of the liner roller 12 is covered with a polyurethane layer; the base 1 can be easily connected to the corrugated paper conveyor through the mounting holes 20, which improves its practicality during use; the polyurethane layer has good wear resistance, elasticity and corrosion resistance, which improves the flexibility and service life of the liner roller 12 during the process of applying glue and scraping evenly when in contact with corrugated paper.
[0037] Working principle: The base 1 is installed above the corrugated paper conveyor. When the corrugated paper conveyor transports the corrugated paper, the glue supply mechanism 13 delivers glue to the top of the corrugated paper. When the corrugated paper moves to the bottom of the liner roller 12, the pressure sensor at the bottom of the liner roller 12 sends feedback to the controller 14. If the glue thickness of the corrugated paper exceeds the preset value, the electric push rod 7 retracts, driving the edge scraper 8 to retract. A pressure relief groove 9 is formed between the edge scraper 8 and the main scraper 6. The main scraper 6 scrapes the glue evenly in the middle of the corrugated paper, and the pressure relief groove 9 reduces the pressure of the edge glue. The system reduces the accumulation and squeezing of adhesive at the edges, preventing overflow. Through components such as controller 14, electric push rod 14, electric push rod 27, and pressure sensor, the system improves the efficiency of dynamic adjustment response, enhances adaptability to low-viscosity water-based adhesives, reduces uneven adhesive penetration and edge overflow, and improves the pass rate of corrugated paper. After the corrugated paper is uniformly coated with adhesive, as the cardboard moves, the infrared drying lamp 16 emits infrared rays to dry the coated area, effectively reducing the subsequent heating energy consumption of the corrugated paper.
[0038] The height of the liner roller 12 can be adjusted by the telescopic movement of the electric push rod 310, which is beneficial to adapt to corrugated paper of different thicknesses. The glue in the glue storage tank 1301 is transported to the heat preservation pipe 1304 through the conveying pipe 1306 by the screw pump 1302, and then flows out evenly from the glue outlet 1305, which is beneficial to provide a stable glue supply during the movement of the corrugated paper.
[0039] Meanwhile, the heating layer 18 can heat the glue in the glue storage tank 1301, keeping the glue within a suitable temperature range and preventing the glue from solidifying due to low temperature. The insulation layer 19 can effectively reduce heat loss and reduce energy consumption. The mounting hole 20 can be used to easily connect the base 1 to the corrugated paper conveyor, improving its practicality during use.
[0040] In addition, through the observation window 21, the operator can intuitively observe the remaining amount of glue in the glue storage tank 1301. When the glue is insufficient, glue can be added in time through the feeding pipe 22, which is beneficial to the continuity of production. The polyurethane layer has good wear resistance, elasticity and corrosion resistance, which improves the flexibility and service life of the liner roller 12 during the process of applying glue and scraping evenly when in contact with corrugated paper.
[0041] The above description is merely a preferred embodiment of this application and is not intended to limit this application. Although this application has been described in detail with reference to the foregoing embodiments, those skilled in the art can still modify the technical solutions described in the foregoing embodiments or make equivalent substitutions for some of the technical features. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of this application should be included within the protection scope of this application.
Claims
1. An environmentally friendly continuous coating structure for corrugated paper, comprising two sets of bases (1), characterized in that, Both sets of bases (1) are fixedly mounted with a support frame (2) at their top ends. A top box (3) is mounted on the top of both sets of support frames (2). Two sets of electric push rods (4) are fixedly mounted on the bottom end of the top box (3). A knife holder (5) is mounted on the output end of the two sets of electric push rods (4). A main scraper (6) is fixedly mounted on the bottom end of the knife holder (5). Electric push rods (7) are symmetrically mounted on the top ends of both sets of bases (1). An edge scraper (8) is mounted on the telescopic end of both sets of electric push rods (7). 8) A pressure relief groove (9) is formed between the main scraper (6) and the top box (3). A glue supply mechanism (13) is provided at the bottom of the top box (3). A liner roller (12) is provided between the glue supply mechanism (13) and the main scraper (6). Two sets of pressure sensors are provided at the bottom of the liner roller (12), and the two sets of pressure sensors are far apart. A controller (14) is fixedly installed on the outer surface of the base (1). The controller (14) is electrically connected to the electric push rod one (4), the electric push rod two (7), and the pressure sensor.
2. The continuous coating structure for environmentally friendly corrugated paper according to claim 1, characterized in that, A lamp holder (15) is fixedly installed on the top of the two sets of bases (1). The lamp holder (15) is located on the side of the main scraper (6) away from the adhesive supply mechanism (13). Several sets of infrared drying lamp tubes (16) are fixedly installed on the bottom of the lamp holder (15).
3. The continuous coating structure for environmentally friendly corrugated paper according to claim 1, characterized in that, The liner roller (12) is equipped with a fixed frame (11) on both sides. The bottom of the top box (3) is equipped with two sets of electric push rods (10). The two sets of electric push rods (10) are located between the electric push rod (4) and the adhesive supply mechanism (13). The telescopic ends of the two sets of electric push rods (10) are installed with the corresponding fixed frame (11).
4. The continuous coating structure for environmentally friendly corrugated paper according to claim 1, characterized in that, The adhesive supply mechanism (13) includes an adhesive storage tank (1301), which is fixedly installed inside the top box (3). A screw pump (1302) is fixedly installed inside the adhesive storage tank (1301). Two sets of rectangular blocks (1303) are fixedly installed at the bottom of the top box (3). The two sets of rectangular blocks (1303) are located directly below the adhesive storage tank (1301). A heat insulation pipe (1304) is fixedly installed between the two sets of rectangular blocks (1303). Several sets of adhesive outlets (1305) are installed at the bottom of the heat insulation pipe (1304). A screw pump (1302) is installed inside the adhesive storage tank (1301). A delivery pipe (1306) is connected between the screw pump (1302) and the heat insulation pipe (1304).
5. The continuous coating structure for environmentally friendly corrugated paper according to claim 4, characterized in that, The outer wall of the glue storage tank (1301) is fixedly installed with an electric heating layer (18), and the outer wall of the electric heating layer (18) is wrapped with a heat insulation layer (19).
6. The continuous coating structure for environmentally friendly corrugated paper according to claim 1, characterized in that, The base (1) has several sets of mounting holes (20) inside.
7. The continuous coating structure for environmentally friendly corrugated paper according to claim 4, characterized in that, An observation window (21) is fixedly installed at the bottom of the glue storage tank (1301), and a feeding pipe (22) is fixedly installed at the top of the glue storage tank (1301).
8. The continuous coating structure for environmentally friendly corrugated paper according to claim 1, characterized in that, The outer surface of the liner roller (12) is covered with a polyurethane layer.