A corrugated roller with a fluted structure that reduces the weight of paper but does not reduce the strength of paperboard

Abstract

The invention discloses a corrugated roller with a fluted structure that reduces the grammage of paper but does not reduce the strength of paperboard, and relates to a corrugated roller for processing corrugated paperboard, characterized in that: the flute top arc of the corrugated roller with a flute structure introduces a second flute top arc r2. The invention can greatly increase the service life of the corrugated roller; improve the stress and impact conditions of the corrugated core paper during meshing and forming, and the corrugated core paper and the flute top arc have a wider, continuous and gentle contact, reducing the damage during forming; improve the flute contact condition, reduce the tension factor of the meshing area, and reduce the damage of the corrugated core paper in the meshing area due to the increasing tension; enable the corrugated roller to obtain better positioning, reduce deviation and vibration; increase the flute waist length of the corrugated corrugated paper, and make the paperboard more firm; reduce the paper consumption rate of the corrugated roller; under the premise of the same amount of glue, the bonding area is wider and the bonding is more effective; the condition of the paperboard indentation is significantly improved. For low-grammage corrugated core paper, the corrugated roller with a fluted structure has better beneficial effects.

Description

Technical Field

[0001] The present invention relates to a corrugated roller for processing corrugated paperboard, and further to a corrugated structure of the corrugated roller, and in particular to a structure of a corrugated top arc aa of the corrugated structure of the corrugated roller; the corrugated roller with the corrugated structure comprises a corrugated roller after fine grinding of the corrugated type and a finished corrugated roller shipped from the factory; the corrugated roller with the corrugated structure is mainly defined by the detection and analysis results of a profilometer, but is not limited to a single detection and analysis method of a profilometer. Background Art

[0002] 1. Corrugated boxes are the most widely used green and environmentally friendly packaging products. Corrugated boxes are made of corrugated paperboard, which is manufactured by corrugated paperboard production lines. The core of the corrugated paperboard production line is the corrugator, and the core component of the corrugator is the corrugated roller. The corrugated paper, which is the core feature of the corrugated paperboard, is formed by the ironing meshing of the corrugated roller. The corrugated surface structure is the first feature of the corrugated roller. The three most important parameters of the corrugated structure are the height of the corrugation, the distance between the corrugations and the arc of the corrugated top. The improvement of the corrugation structure often seems to be very small, but it is not. Taking the most common B flute as an example, there are more than 150 flutes in 1 meter of corrugated paperboard. A little improvement of a flute cannot be underestimated after being magnified; if the average production speed of the corrugated paperboard production line is 150 meters per minute, a little improvement of a flute will be a considerable amount in a year.

[0003] 2. The corrugating machine has corrugating rollers as core components, including: middle corrugating rollers (1), outer corrugating rollers (2), pressure rollers (3), glue rollers (4), and glue-leveling (scraping) rollers (5), and these five rollers are typical representative features; the function of the corrugating machine is to produce single-sided corrugated paperboard (8), which is formed by ironing the corrugated core paper (6) at the meshing point of the center line of the corrugating rollers, and then adhered to the surface of the middle corrugating roller (1) by positive pressure (wind pressure) or negative pressure (vacuum adsorption). When it runs to the glue roller (4), the top of the corrugated paper is coated with a certain thickness of glue by the glue roller (4) (the thickness of the glue applied can be adjusted by the glue-leveling (scraping) roller (5)), and when it continues to run to the center line of the pressure roller (3) and the middle corrugating roller (1), it is bonded to the preheated inner paper (or middle paper) (7) under the action of temperature and pressure to form a single-sided corrugated paperboard (8).

[0004] 3. The most ideal forming state of corrugated core paper is: it is ironed and formed only at the meshing point of the center line of the corrugated rollers, and the smaller the total contact angle in the meshing area of ​​the corrugated rollers, the better, and the most ideal value is zero. In order to distinguish the essential difference between corrugated rollers and gears, the tooth type or tooth shape of the corrugated roller is referred to as the flute type or flute shape in the present invention, which is also a more professional name in the industry. The flute type described in the present invention includes the flute shape.

[0005] 4. The most standard structure of the traditional flute type of corrugated roller consists of three parts: the flute top arc r, the flute bottom arc R, and the flute side line segment ab that is tangent to the flute top arc aa and the flute bottom arc bb.

[0006] 5. The functions of the flute side ab are twofold: first, it connects the flute top arc aa and the flute bottom arc bb; second, it optimizes it to provide the flute side clearance required for the passage of high-weight corrugated core paper (6).

[0007] 6. The arc bb at the bottom of the flute has three functions: first, it cooperates with the arc aa at the top of the flute to complete the ironing and meshing of the corrugated core paper; second, it provides the required clearance for the corrugated core paper to pass through the meshing area and reach the meshing position through the difference in radius with the arc aa at the top of the flute; third, through the meshing with the arc aa at the top of the flute, the corrugated roller can obtain better positioning and reduce deviation and vibration.

[0008] 7. The functions of the arc aa at the top of the corrugation have ten aspects: first, it cooperates with the arc bb at the bottom of the corrugation to complete the ironing and meshing of the corrugated core paper; second, it provides the required clearance for the corrugated core paper to pass through the meshing area and reach the meshing position through the difference in radius with the arc bb at the bottom of the corrugation; third, it cooperates with the arc bb at the bottom of the corrugation to complete the ironing and meshing of the corrugated core paper. The meshing of corrugated rollers enables better positioning and reduces deviation and vibration; fourth, it directly affects the service life of corrugated rollers and is an important factor that directly affects the service life of corrugated rollers; fifth, it affects the stress condition of corrugated core paper during meshing and forming. The smaller the arc of the corrugated top, the worse the stress condition of corrugated core paper during meshing and forming, the greater the damage to the top of the corrugated top, and even the cutting of corrugated core paper during meshing and forming; sixth, it affects the corrugated contact condition of corrugated core paper in the meshing area, affects the total wrap angle of the meshing area of ​​the corrugated roller, affects the size of the tension factor in the meshing area, and affects the size of the increasing tension and the degree of damage caused by the corrugated core paper when passing through the meshing area; seventh, it directly affects the paper usage rate of corrugated rollers and is the third influencing factor after the corrugation height and corrugation distance; eighth, it affects the glue amount, glue width, bonding width and bonding effect of the top of the corrugated core paper corrugated paper; ninth, it affects the indentation condition of single-sided corrugated board; tenth, it affects the strength of corrugated board, including edge flat pressure strength, edge pressure strength, bonding strength, etc.

[0009] 8. The characteristics of the flute top arc aa of the traditional flute structure corrugated roller are: its flute top arc aa is composed of a section of flute top arc r, and when the flute profile is measured and analyzed by a professional profiler, the values ​​obtained at any point on the flute top arc are the same.

[0010] CN 102019720 B A corrugated roller tooth-type three-arc structure, the full text of which truthfully expresses that the corrugated roller corrugated top arc of the traditional corrugated structure is composed of a section of corrugated top arc r.

[0011] CN 103707560 A An M-flute type corrugated roller, the full text of which truthfully expresses that the corrugation top circular arc of a traditional corrugated type structure corrugated roller is composed of a section of corrugation top circular arc r.

[0012] CN 103692702 A A corrugated roller tooth-shaped T-bone corrugated structure, the full text of which truthfully expresses that the corrugated roller corrugated top arc of the traditional corrugated structure is composed of a section of corrugated top arc r.

[0013] It can be seen from the role of the flute top arc aa that the flute top arc aa is one of the key points in the optimization design of the corrugated roller flute type. However, if the corrugated roller flute type is optimized by simply increasing or decreasing the radius of the flute top arc r, the advantages will be obtained while the disadvantages will be suffered. How to maximize the advantages and avoid the disadvantages is the technical problem to be solved by the present invention. Summary of the invention

[0014] The present invention aims to provide a corrugated roller with a fluted structure which can reduce the grammage of paper but not reduce the strength of paperboard, and relates to a corrugated roller for processing corrugated paperboard, and further to the fluted structure of the corrugated roller, and in particular to the structure of the flute top arc aa of the flute structure of the corrugated roller, so as to solve the technical problem of "taking advantage while suffering disadvantage" in the traditional corrugated roller with a flute structure, which is to optimize the flute type of the corrugated roller by simply increasing or reducing the radius of the flute top arc r.

[0015] 1. A corrugated roller with a corrugated structure for reducing the grammage of paper but not reducing the strength of paperboard, relating to a corrugated roller for processing corrugated paperboard, and further relating to the corrugated structure of the corrugated roller, comprising a corrugated top arc aa, a corrugated top arc r, a second corrugated top arc r2, a corrugated bottom arc R, and a corrugated side line segment or corrugated side arc ab that is circumscribed or intersected with the corrugated top arc r2 and the corrugated bottom arc R, characterized in that: the corrugated roller with a corrugated structure introduces the second corrugated top arc r2, the corrugated top arc aa of the corrugated roller with a corrugated structure is composed of the corrugated top arc r and the second corrugated top arc r2, the top (or middle) of the corrugated top arc aa of the corrugated roller with a corrugated structure is composed of a second corrugated top arc r2 whose size is between the corrugated top arc r and the corrugated bottom arc R, the second corrugated top arc r2 can be a single arc, or three or more arcs including transition and optimization effects, but the center position and size of the top remain unchanged.

[0016] 2. Before the corrugated core paper passes through the meshing area of ​​the corrugated roller and reaches the meshing point, it always slides over the corrugated top at a high speed of 130% to 150% of the production speed, so the corrugated roller is always worn at the top of the corrugated type. The size of the corrugated top arc aa, which is the direct wear object, directly affects the service life of the corrugated roller and is an important factor directly affecting the service life of the corrugated roller; a corrugated roller with a corrugated structure that reduces the grammage of paper but does not reduce the strength of the cardboard, and its characteristics and beneficial effects are: relative to the corrugated top arc r of the traditional corrugated roller with a corrugated structure, the introduced second corrugated top arc r2 is larger than the corrugated top arc r, under the premise of the same thickness (height) loss, the amount of coating that needs to be worn in the present invention is much larger than the coating wear amount of the corrugated top arc r of the traditional corrugated roller with a corrugated structure, which is converted into a beneficial effect that the corrugated roller with a corrugated structure of the present invention can greatly increase the corrugated roller

[0017] service life.

[0018] 3. During the meshing forming process, the corrugated core paper is subjected to the greatest impact at the top of the flute, and is most likely to be damaged first at the top of the flute. A corrugated roller with a corrugated structure that reduces the grammage of paper but does not reduce the strength of the cardboard has the following characteristics and beneficial effects: relative to the flute top arc r of the traditional corrugated roller with a corrugated structure, the introduced second flute top arc r2 is larger than the flute top arc r, thereby improving the stress and impact conditions of the corrugated core paper during the meshing forming process, a wider contact area, a wider forming area, and a gentle impact on the top of the flute. The corrugated core paper is in gentle, continuous and extensive contact with the flute top arc aa and the flute bottom arc bb. The corrugated core paper is always in a gentle and gentle stress state during the entire meshing forming process, and the stress during meshing is more widely and evenly distributed, thereby reducing the damage to the flute top during the meshing forming process, increasing the edge pressure strength of the cardboard, and avoiding damage and breakage of the corrugated core paper during the meshing forming process.

[0019] 4. The corrugated core paper must pass through the meshing area of ​​the corrugated roller to reach the meshing position and be meshed and formed. The traditional corrugated roller uses the gap generated by the difference between the radius of the corrugated top arc r and the radius of the corrugated bottom arc R to provide the required gap for the corrugated core paper to pass through the meshing area of ​​the corrugated roller (usually the radius of the corrugated bottom arc R is about 0.30 or more larger than the radius of the corrugated bottom arc r). The gap generated by the appropriate difference between the radius of the corrugated bottom arc R and the radius of the corrugated top arc r can theoretically provide the required running gap for the corrugated core paper to pass through the meshing area. However, in practice, the thickness of the corrugated core paper will be reduced due to the meshing pressure during meshing, which will cause the gap on the corrugated side to be further reduced, which will cause the tension of the corrugated core paper to increase during operation and make it difficult to run. The gram weight of the corrugated core paper is generally 90~200 Grams, the thickness changes generally from 0.16 to 0.30, the forming meshing area will increase with the increase of the grammage of the corrugated core paper, the flute side gap will decrease with the increase of the grammage of the corrugated core paper, the operating tension or tension factor will increase with the increase of the grammage of the corrugated core paper, when the tension increases to a certain extent, there will be obvious paper shredding phenomenon visible to the naked eye, so in order to meet the needs of running high-gram-weight corrugated core paper, the traditional corrugated structure corrugated roller has to introduce the flute side arc R3 to improve the paper shredding phenomenon that may occur when the corrugated roller runs high-gram-weight corrugated core paper; the introduction of the flute side arc R3 is entirely a compromise measure to enable the traditional corrugated structure corrugated roller to run high-gram-weight corrugated core paper without paper shredding, and for low-gram-weight corrugated core paper, the flute side arc R3 The introduction of will have a certain adverse effect on the forming of corrugated core paper and the strength of the formed cardboard, especially for the corrugator with positive pressure (wind pressure) adsorption structure; the larger the gap on the side of the corrugation, the better, but on the contrary, under the premise of being able to provide an effective passing gap, the smaller the better, which is beneficial to the forming of the corrugated core paper and the strength of the formed cardboard; a corrugated roller with a corrugated structure that reduces the grammage of paper but does not reduce the strength of the cardboard, its characteristics and beneficial effects are: relative to the corrugated top arc r of the traditional corrugated roller with a corrugated structure, the introduced second corrugated top arc r2 is larger than the corrugated top arc r, but r2 does not affect the size of the corrugated top arc aa, on the contrary, because the arc length of r2 is smaller than the arc length of the replaced corrugated top arc r, the total contact area between the corrugated core paper and the corrugated top arc aa is reduced; and because the second corrugated top arc r2 The introduction of improves the stress and impact conditions of the corrugated core paper during meshing and forming, with a wider contact area and a wider forming area. The impact on the top of the flute becomes smoother, and the corrugated core paper is in extensive, continuous, gentle and smooth contact with the flute top arc aa. The stress during meshing is widely and evenly distributed, and the thickness loss of the corrugated core paper is improved due to the reduction of the meshing pressure. The above improvements are all conducive to improving the flute contact condition of the corrugated core paper, reducing the total contact angle of the meshing area, reducing the tension factor of the meshing area, and reducing the damage of the corrugated core paper 6 in the meshing area due to the increasing tension, thereby increasing the strength of the cardboard.

[0020] 5. A corrugated roller with a fluted structure that reduces the grammage of paper but does not reduce the strength of the cardboard, the characteristics and beneficial effects of which are: relative to the flute side length ab of the traditional flute corrugated roller, the introduced second flute top arc r2 is larger than the flute top arc r and is located on the inner side of the flute top arc aa, under the premise of the flute height remaining unchanged, the flute side length ab is increased, the flute side clamping force is reduced, thereby increasing the flute waist length of the corrugated paper of the corrugated cardboard, making the flute waist angle firmer, and making the flute waist of the corrugated paper longer and firmer, which translates into a beneficial effect: the flat compression strength of the corrugated cardboard is significantly improved, the cardboard is firmer, and the hand feel is better.

[0021] 6. A corrugated roller with a corrugated structure that reduces the grammage of paper but does not reduce the strength of the cardboard, the characteristics and beneficial effects of which are: compared with the gluing and bonding conditions of the corrugated top arc r of the traditional corrugated roller with a corrugated structure, the introduced second corrugated top arc r2 is larger than the corrugated top arc r, and under the premise of unchanged glue application amount, the gluing area is wider, the bonding area is wider, and the bonding effect is better.

[0022] 7. A corrugated roller with a corrugated structure that reduces the grammage of paper but does not reduce the strength of the cardboard, the characteristics and beneficial effects of which are: relative to the corrugated top arc r of the traditional corrugated roller with a corrugated structure, the introduced second corrugated top arc r2 is larger than the corrugated top arc r, but the second corrugated top arc r2 is located on the inner side of the top of the corrugated top arc r, and the arc length of r2 is significantly smaller than the arc length of the replaced r, thereby bringing about the beneficial effect that the paper usage rate of the corrugated roller is reduced.

[0023] 8. A corrugated roller with a fluted structure that reduces the grammage of paper but does not reduce the strength of the cardboard, the characteristics and beneficial effects of which are: compared with the meshing of the flute top arc r and the flute bottom arc R of the traditional flute structure corrugated roller, the introduced second flute top arc r2 is larger than the flute top arc r, and can be more widely, continuously, gently and smoothly meshed with the flute bottom arc R, so that the corrugated roller can obtain better positioning, reduce deviation and vibration, and the corrugated roller can run more smoothly.

[0024] 9. A corrugated roller with a fluted structure that reduces the grammage of paper but does not reduce the strength of the paperboard, the characteristics and beneficial effects of which are: relative to the flute top arc r of the conventional flute structure corrugated roller, the introduced second flute top arc r2 is larger than the flute top arc r, and in the process where the corrugated core paper passes through the center line of the middle flute roller and the pressure roller and is bonded to the preheated lining paper (or middle paper) under the action of pressure and temperature to form a single-faced corrugated paperboard, similar to the beneficial effects described in point 3 of the present invention: relative to the flute top arc r of the conventional flute structure corrugated roller, the introduced second flute top arc r2 is larger than the flute top arc r It is larger than the arc r of the corrugated top, thereby improving the stress and impact conditions of the corrugated core paper and the lining paper (or middle paper) during bonding, a wider contact area, a wider bonding area, and a gentler impact on the top of the corrugated top, allowing the corrugated core paper and the lining paper (or middle paper) to have a relatively gentle and continuous contact with the top of the corrugated top of the pressure roller and the corrugated roller, so that the stress during bonding can be more widely and evenly distributed, reducing the damage to the corrugated core paper and the lining paper (or middle paper) during bonding, and improving the edge pressure strength of the cardboard. The specific visual performance is: the indentation condition of the single-sided corrugated cardboard is significantly improved.

[0025] 10. A corrugated roller with a fluted structure that reduces the grammage of paper but does not reduce the strength of the cardboard, the characteristics and beneficial effects of which are: compared with the flute top arc r of the traditional flute structure corrugated roller, the second flute top arc r2 introduced is between the flute top arc r and the flute bottom arc R, and when the corrugated core paper is formed, the flute top arc aa and the flute bottom arc bb are always in a gentle and continuous contact state without gaps or mutations, thereby ensuring that the corrugated roller obtains better positioning, runs smoothly, and reduces deviation and vibration.

[0026] 11. A corrugated roller with a corrugated structure that reduces the grammage of paper but does not reduce the strength of the cardboard, and its characteristics and beneficial effects are: the beneficial effects of the present invention are not limited to the above-mentioned beneficial effects brought about by simply introducing the second corrugation top arc r2. The above-mentioned beneficial effects are explained to facilitate the understanding of the present invention, and are based on the premise that the corrugation top arc aa of the corrugated roller with a corrugated structure of the present invention = the corrugation top arc r = the corrugation top arc r of the traditional corrugated roller with a corrugated structure (completely equivalent to the corrugation top arc aa), and the radii of the three are the same. The beneficial effects of the present invention lie more in the corresponding changes, optimizations and innovations of the corrugation top arc r, the corrugation bottom arc R and the corrugation side ab caused by the introduction of the second corrugation top arc r2.

[0027] In summary, compared with the prior art, the beneficial effects of the present invention are as follows: the present invention can perfectly solve the technical problem of "taking advantage while suffering disadvantage" that exists in the traditional corrugated roller with corrugated structure, which is to optimize the corrugated roller by simply increasing or reducing the size of the corrugated top arc. The corrugated top arc of the corrugated roller with corrugated structure of the present invention is small but not sharp, large but not blunt; it takes advantage of the advantages and avoids the disadvantages. The service life of the corrugated roller can be greatly increased; the stress and impact conditions of the corrugated core paper during meshing and forming are improved, the wider contact area and the wider forming area make the impact on the top of the corrugated tip become gentle, the stress during meshing can be more evenly distributed, the damage to the corrugated top during meshing and forming is reduced, the edge pressure strength of the cardboard is increased, and the damage and breakage of the corrugated core paper during meshing and forming is avoided; the contact condition of the corrugated type is improved, the corrugated roller obtains better positioning, and the deviation and vibration are reduced; the length and stiffness of the corrugated waist of the corrugated paper of the corrugated cardboard are increased, and the angle of the corrugated waist of the corrugated paper of the corrugated cardboard is improved, so that the flat compression strength of the corrugated cardboard can be significantly improved, the cardboard is more firm, and the hand feel is better; the paper consumption rate of the corrugated roller is reduced; under the condition of the glue application amount remaining unchanged, the glue application area is wider, the bonding area is wider, and the bonding effect is better; the indentation condition of the single-sided corrugated cardboard is significantly improved; so that the goal of reducing the gram weight of paper but not reducing the strength of the cardboard can be achieved. The invention has more significant beneficial effects for low-gram weight corrugated core paper. BRIEF DESCRIPTION OF THE DRAWINGS

[0028] Figure 1 Schematic elevation diagram of typical features of corrugated machine.

[0029] Figure 2 Schematic diagram of the contact angle of corrugated core paper on the corrugated roller.

[0030] Figure 3 Schematic diagram of the corrugated structure of a traditional corrugated roller.

[0031] Figure 4 Schematic diagram of the flute top structure of a traditional flute-type corrugated roller.

[0032] FIG. 5 is a schematic diagram of the corrugated top structure of the corrugated roller of the present invention.

[0033] Figure 6 Schematic diagram of the results of measuring and analyzing the arc of the corrugated top at any point when using the corrugated roller profiler for traditional corrugated structure.

[0034] FIG. 7 is a schematic diagram showing the correct point selection results of the arc of the corrugated top when measuring and analyzing the corrugated roller profiler of the corrugated structure of the present invention.

[0035] Figure 8 Schematic diagram of the stress condition on the top of the flute of the traditional flute structure corrugated roller and corrugated core paper during meshing and forming.

[0036] FIG. 9 is a schematic diagram of the stress condition of the top of the flute when the corrugated rollers and the corrugated core paper of the flute structure of the present invention are meshed and formed.

[0037] Figure 10 Schematic diagram of the gluing condition of the corrugated core paper of the corrugated roller in the traditional fluted structure.

[0038] Fig. 11 is a schematic diagram of the gluing condition of the corrugated core paper of the corrugated roller of the corrugated structure of the present invention.

[0039] Figure 12 Schematic diagram of the indentation condition of single-faced corrugated cardboard on corrugated rollers with traditional fluted structure.

[0040] FIG. 13 is a schematic diagram of the indentation condition of the single-faced corrugated paperboard of the corrugated roller of the corrugated structure of the present invention.

[0041] Among them: 1 is the middle corrugated roller, 2 is the outer corrugated roller, 3 is the pressure roller, 4 is the glue coating roller, 4.1 is the glue carried on the surface of the glue coating roller, 5 is the glue spreading (scraping) roller, 6 is the corrugated core paper, 7 is the inner paper or outer paper, 8 is the single-faced corrugated board, 9 is the contact wrap angle of the meshing area, r is the corrugation top arc, R is the corrugation bottom arc, and r2 is a schematic diagram of the second corrugation top arc introduced in the present invention. DETAILED DESCRIPTION

[0042] In order to make the technical means, technical features, objectives and effects achieved by the present invention easy to understand, further explanation is given below in conjunction with specific drawings and preferred implementation process steps.

[0043] As can be seen from Figure 5, the corrugated top arc of the corrugated structure corrugated roller of the present invention includes: a corrugated top arc ac with a radius of r and a second corrugated top arc cc with a radius of r2, the second corrugated top arc r2 is between the corrugated top arc r and the corrugated bottom arc R, the second corrugated top arc r2 is located at the top or middle position of the corrugated top arc aa, the second corrugated top arc r2 is tangent to the corrugated top arc r, and the second corrugated top arc r2 can be a single arc, or can be three arcs or more than three arcs including transition optimization effect.

[0044] Step 1: Design of flute parameters: According to the flute characteristics of the corrugated roller with flute structure as shown in Figure 5, a set of independently developed interactive computer programs is used to conduct preliminary optimization design and comprehensive comparison and analysis of multiple indicators on the flute parameters of the corrugated roller according to the grammage of the corrugated core paper to be run. The optimal scheme is selected and simulated and analyzed by professional computer software to finally determine the optimal flute parameters, which mainly include: flute height, corrugated roller diameter, number of flutes of corrugated roller, flute top arc aa, flute top arc r, flute bottom arc R, and the size, position and structure of the second flute top arc r2.

[0045] Step 2: Design, order or manufacture diamond rollers for fine grinding of corrugated rollers based on the determined optimal corrugation parameters.

[0046] Step 3: Use a qualified diamond roller to perform fine grinding on the corrugated roller using a professional corrugated grinder.

[0047] Step 4: The corrugated rollers after fine grinding are subjected to post-processing such as spraying and polishing.

[0048] The above description illustrates the technical field, basic principles, main technical features, technical problems solved, beneficial effects and specific implementation methods of the present invention. The present invention is not limited by the specific drawings, the present invention is not limited by the preferred implementation process steps, and the present invention may have various changes, improvements and extensions without departing from the spirit and scope of the present invention, and these changes, improvements and extensions fall within the scope of the present invention to be protected, and the scope of the present invention to be protected is defined by the attached claims and their equivalents.

Claims

1. A corrugated roller with a corrugated structure that reduces the weight of paper without reducing the strength of the paperboard. Features: The corrugated top arc aa of the corrugated structure corrugated roller introduces the second corrugated top arc r2, and the corrugated top arc aa is composed of the corrugated top arc r and the second corrugated top arc r2. The middle part of the corrugated top arc aa is composed of a second corrugated top arc r2 with a radius between the corrugated top arc r and the corrugated bottom arc R.

2. A corrugated roller with a corrugated structure for reducing the grammage of paper without reducing the strength of paperboard according to claim 1, Features: The corrugated top arc aa also includes a transition optimization arc. The corrugated top arc aa is composed of a corrugated top arc r, a second corrugated top arc r2 and a transition optimization arc. The transition optimization arc is located between the corrugated top arc r and the second corrugated top arc r2.

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