Ultrahigh-temperature acceleration system for corrugated board production line

Abstract

The utility model relates to an ultrahigh-temperature speed increasing system for a corrugated board production line. According to a traditional tile line double-sided machine, the corrugated tip of upper-layer tile paper is difficult to reach the temperature required by glue gelatinization, and the product quality can only be ensured by reducing the speed of the machine. The device comprises a surface paper roller, a corrugating base paper roller, a corrugating machine and a main air inlet pipe, and is characterized in that a preheating unit is arranged on a path from the corrugating base paper roller to the corrugating machine, wherein the corrugating base paper is output by the corrugating base paper roller; the main air inlet pipe is connected with an electromagnetic heating unit, the electromagnetic heating unit is connected to a ridge tip accelerator through an air pipe, the ridge tip accelerator is arranged in a paperboard bonding area, the ridge tip accelerator comprises an upper ultrahigh-temperature arc-shaped plate and a lower ultrahigh-temperature arc-shaped plate, and a plurality of exhaust holes are formed in the upper surface, the lower surface and the front end surface of the ultrahigh-temperature arc-shaped plate. According to the utility model, the paperboard line production speed can be improved, the water loss rate of surface paper is reduced, and the paperboard flatness is improved.

Description

Technical Field

[0001] The utility model relates to an ultra-high temperature speed-up system for a corrugated cardboard production line. Background Art

[0002] Since the entire cardboard market after the epidemic, there has been overcapacity, industry involution, homogeneous low-price competition. All industries need to reduce costs and increase efficiency. Therefore, it is necessary to improve the cardboard quality and service to enhance the market competitiveness of enterprises.

[0003] The traditional double-sided machine of the corrugating line heats the upper corrugated tip of the corrugated paper by steam. The main steam used is the saturated raw steam of the boiler. The water content in the steam is large. And since it is difficult to make the upper corrugated tip of the corrugated paper reach the temperature required for glue gelatinization, the steam injection temperature is 120°C - 135°C (0.2 - 0.3 MPa), and the temperature drops to 90°C - 110°C when it reaches the corrugated tip surface. This results in that when the corrugating line runs at high speed, the temperature of the corrugated tip cannot meet the high-speed running requirements, and only the running speed can be reduced to ensure the product quality.

[0004] To ensure the bonding of the cardboard, the usual operation method is to increase the glue application amount and combine with reducing the production speed to ensure the cardboard quality. Due to the high moisture content in the upper corrugated tip of the corrugated paper and the uneven moisture content of each paper layer of the cardboard, it is also easy to cause quality problems such as cardboard warping, false bonding, and poor corrugation type. Content of the Utility Model

[0005] The utility model aims at the above problems and provides an ultra-high temperature speed-up system for a corrugated cardboard production line, which can increase the production speed of the cardboard line, reduce the water loss rate of the face paper, and improve the flatness of the cardboard.

[0006] For this purpose, the utility model adopts the following technical solutions: The ultra-high temperature speed-up system for a corrugated cardboard production line includes a face paper roll, a corrugated base paper roll, a corrugating machine, and a main air inlet pipe. It is characterized in that a preheating unit is arranged on the path where the corrugated base paper roll outputs the corrugated base paper to the corrugating machine; the main air inlet pipe is connected to an electromagnetic heating unit, the electromagnetic heating unit is connected to a corrugated tip accelerator through an air pipe, the corrugated tip accelerator is arranged in the cardboard bonding area, and the corrugated tip accelerator includes an upper and lower segmented ultra-high temperature arc-shaped plate, and the ultra-high temperature arc-shaped plate is provided with multiple rows of air holes on the upper surface, lower surface, and front end surface.

[0007] Preferably, the preheating unit is an electric heating roller or a steam heating roller.

[0008] Preferably, the preheating unit is a preheating oven.

[0009] Preferably, the electromagnetic heating unit is a coil-type electromagnetic heater, and the coil-type electromagnetic heater is connected to an electric control unit.

[0010] Preferably, the multiple exhaust holes of the segmented ultra-high temperature arc plate are divided into multiple width zones, and the air holes in each width zone are controlled by different air valves for opening and closing.

[0011] Preferably, a first switch valve, a flow regulating switch and a flow meter are arranged on the main intake pipe.

[0012] Preferably, a recycled steam pipe is further included. A second switch valve is arranged on the connection path of the recycled steam pipe to the main intake pipe, and the second switch valve is controlled by a PLC for opening and closing.

[0013] The beneficial effects of the present utility model are as follows:

[0014] 1. Through electromagnetic heating technology, the recycled steam is reheated to generate ultra-high temperature steam, and the temperature can reach 150°C to 400°C. By spraying the ultra-high temperature steam, the glue at the corrugated tips can be quickly emulsified, accelerating the bonding of the middle and upper layers of cardboard. Since the glue dries thoroughly, there will be no phenomenon of glue sticking to the knife, which can greatly improve the production speed of the cardboard line and the flatness of the cut.

[0015] 2. When the system is connected to the production management system, it can automatically track the production speed, material, width and gram weight, and automatically match the required steam size, temperature and air output during high-speed operation.

[0016] 3. By setting the preheating unit, the water loss rate of the face paper can be reduced, and the flatness of the cardboard can be improved. The starch consumption can be reduced, and the flatness of the cardboard cut and the stiffness of the cardboard can be improved.

[0017] 4. By setting the recycled steam pipe, it is preferentially utilized to save steam and energy consumption. Description of the Drawings

[0018] Figure 1 It is a schematic structural diagram of the setting position of the corrugated tip accelerator of the present utility model.

[0019] Figure 2 It is a schematic structural diagram of the electromagnetic heating unit heating the corrugated tip accelerator.

[0020] Figure 3 It is a schematic structural diagram of the ultra-high temperature arc plate of the present utility model.

[0021] In the figure: 1 - face paper; 2 - corrugated base paper; 3 - sizing machine; 4 - sizing roller; 5 - ultra-high temperature arc plate; 6 - heating plate; 7 - composite paper; 8 - width switch; 9 - recycled steam pipe; 10 - main intake pipe; 11 - first switch valve; 12 - flow regulating switch; 13 - flow meter; 14 - electronic control unit; 15 - electromagnetic heating unit; 16 - second switch valve; 17 - width partition zone. Detailed Embodiments

[0022] The following further elaborates the present utility model in conjunction with specific embodiments.

[0023] As Figure 1 - Figure 2 shown in the high-temperature speed-up system of the corrugated cardboard production line, it includes a facestock roll, a corrugated base paper roll, a conveyor roll, and a corrugator. The facestock roll winds and conveys the facestock 1. A preheating unit is arranged on the path where the corrugated base paper roll outputs the corrugated base paper 2 to the corrugator. The facestock 1 and the corrugated base paper 2 are compounded to form a group of compound layer papers 7 (this part of the content belongs to the prior art and is not shown in the figure). The multi-segment compound papers are transmitted to the heating plate 6 area after passing through the gluing machine 3 with the upper gluing roller 4 and are finally compounded into finished products.

[0024] The main air inlet pipe 10 is connected to the electromagnetic heating unit 15. The electromagnetic heating unit 15 is connected to the corrugation tip accelerator through an air pipe. The corrugation tip accelerator is arranged in the cardboard bonding area. The corrugation tip accelerator includes an upper and lower segmented ultra-high temperature arc plate 5. As Figure 3 shown, the upper, lower, and front ends of the upper and lower segmented ultra-high temperature arc plate are provided with multiple rows of air holes. The two ultra-high temperature arc plates are specifically arranged between three compound layer papers and are arranged vertically.

[0025] By setting the preheating unit to preheat the corrugated base paper in advance, the paper breakage rate can be reduced and the quality of the compound layer paper can be improved. Connect the electromagnetic heating unit to the main air inlet pipe. Inject ultra-high temperature steam into the ultra-high temperature arc plate through the electromagnetic heating unit, and use the arc heat plate to evenly spray on the middle layer separator paper, corrugation tips, and corrugation pits to ensure a higher temperature of the corrugation tips, so that the glue on the upper layer corrugation tips reaches the temperature required for rapid curing. Accelerate the bonding of the middle layer cardboard and also improve the production speed of the cardboard line.

[0026] In one embodiment, the preheating unit is an electric heating roller or a steam heating roller. A preheating roller can be arranged on the conveying path of the corrugated base paper for preheating in advance.

[0027] In one embodiment, the preheating unit is a preheating oven. A preheating oven can also be arranged at a position close to the corrugator on the conveying path of the corrugated base paper to ensure that the preheating temperature is continuously kept stable.

[0028] Specifically, the electromagnetic heating unit is a coil type electromagnetic heater, and the coil type electromagnetic heater is connected to an electric control unit. The coil type electromagnetic heater heats to generate low-pressure high-temperature steam. Not only can the temperature be controlled, but also the steam makes the water molecules in the steam finer and the temperature higher through electromagnetic heating. The heat is more easily penetrated and transferred to the corrugated paper.

[0029] In one embodiment, the multiple exhaust holes of the upper and lower segmented ultra-high temperature arc plates are divided into multiple width zones, and the air holes in each width zone are controlled by different width switches 8. According to the requirements of the width of different products in production, the size of the width zone of the exhaust holes is automatically adjusted. The exhaust holes outside the corrugated paper are closed, allowing the equipment to operate in a more energy-efficient mode. The width size is adjusted by opening and closing the air holes in the width separation zone 17. Each time one gear is reduced, 150 mm is subtracted from both ends. There are 4 gears for the width, which are 1.6 m, 1.9 m, 2.2 m, and 2.5 m respectively.

[0030] Specifically, a first switch valve 11, a flow regulating switch 12, a flow meter 13, and an electronic control unit 14 are provided on the main intake pipe. The electronic control unit 14 mainly functions to implement monitoring and adjustment.

[0031] In one embodiment, a recovered steam pipe 9 is further included. The recovered steam pipe 9 is connected to the main intake pipe 10, and a second switch valve 16 is provided on the recovered steam pipe 9. By providing the recovered steam pipe, steam and energy consumption can be saved.

[0032] In the present utility model, the electromagnetic heating unit makes the water molecules in the steam finer and the temperature higher, making it easier to penetrate. Combined with a more reasonable structural design of the corrugated tip accelerator, the temperature of the third layer, the fifth layer, the intermediate spacer paper, the fourth layer, and the corrugated tips of the sixth layer is increased through multiple rows of steam outlets. Under the action of high-temperature gas, the temperature is quickly transmitted to the corrugated tip glue, and it is quickly ripened and hardened, allowing the cardboard production line to run at a higher speed to achieve the effect of energy saving and efficiency improvement.

[0033] When producing 7-layer cardboard, the upper and lower heating plates and the upper and lower segmented ultra-high temperature arc plates 5 are opened. If producing 5-layer paper products, only the lower heating plate and the lower ultra-high temperature arc plate 5 are opened.

[0034] The present utility model enables the equipment to run at a high speed with a lower sizing amount, reducing the consumption of starch. The ultra-high temperature arc plate is provided with 4 width regions, and the temperature can be controlled high or low, reducing the steam consumption of the hot plate part, saving energy and reducing consumption, and ensuring good bonding of the cardboard while improving the physical indexes such as the compressive strength, burst resistance, and flatness of the cardboard.

[0035] Through the electromagnetic overheating device, the steam injection temperature can be 150°C - 400°C, ensuring a higher temperature of the corrugated tips, enabling the upper corrugated tip glue to reach the temperature required for rapid curing, and accelerating the bonding of the middle-layer cardboard. Since the glue dries quickly under the action of high-temperature steam, there will be no phenomenon of sticking to the knife, improving the production speed and cut surface flatness of the cardboard line.

[0036] It should be understood that these embodiments are only used to illustrate the present utility model and not to limit the scope of the present utility model. In addition, it should be understood that after reading the content taught by the present utility model, those skilled in the art can make various changes or modifications to the present utility model, and these equivalent forms also fall within the scope defined by the appended claims of this application.

Claims

1. The ultra-high temperature speed-up system for a corrugated board production line, comprising a facer roll, a corrugating medium roll, a corrugator and a main intake pipe, is characterized in that A preheating unit is provided on the path where the corrugated base paper roll outputs the corrugated base paper (2) to the corrugating machine; the main air inlet pipe (10) is connected to the electromagnetic heating unit (15), and the electromagnetic heating unit (15) is connected to the corrugation tip accelerator through an air pipe. The corrugation tip accelerator is arranged in the cardboard bonding area. The corrugation tip accelerator includes an upper and lower segmented ultra-high temperature arc plate (5), and the ultra-high temperature arc plate is provided with multiple rows of air holes on the upper, lower and front end faces.

2. The ultra-high temperature speed-up system for a corrugated cardboard production line according to claim 1, wherein The preheating unit is an electric heating roller or a steam heating roller.

3. The super-high temperature speed-up system for a corrugated cardboard production line according to claim 1, characterized in that The preheating unit is a preheating oven.

4. The ultra-high temperature speed-up system for a corrugated cardboard production line according to any one of claims 1-3, characterized in that The electromagnetic heating unit is a coil type electromagnetic heater, and the coil type electromagnetic heater is connected to the electric control unit (14).

5. The super-high temperature speed-up system for a corrugated cardboard production line according to claim 4, characterized in that The multiple rows of air holes of the segmented ultra-high temperature arc plate (5) are divided into multiple width zones, and the air holes in each width zone are controlled by different air valves for opening and closing.

6. The super-high temperature speed-up system for a corrugated cardboard production line according to claim 5, characterized in that A first switch valve (11), a flow rate regulating switch (12) and a flow meter (13) are arranged on the main air inlet pipe.

7. The ultra-high temperature speed-up system for the corrugated cardboard production line according to claim 6, characterized in that It further includes a recovered steam pipe (9), and a second switch valve (16) is arranged on the path where the recovered steam pipe (9) is connected to the main air inlet pipe (10).

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