Cold-setting multi-layer corrugated board composite structure

Abstract

The utility model belongs to the technical field of corrugated equipment, and relates to a cold-setting multilayer corrugated board composite structure, which comprises at least two groups of corrugated composite structures and a surface paper guide roller, the corrugated composite structures are sequentially arranged along the corrugated forming direction, and the surface paper guide roller is arranged on the outer side of the corrugated composite structures to guide surface paper. Each corrugated composite structure comprises a vacuum synchronous roller, and an upper pressing roller is arranged in the paper feeding direction of the vacuum synchronous roller in a rolling tangent mode so that corrugated paper can be attached to the surface of the vacuum synchronous roller. A gluing roller is arranged on the lower portion of the other side of the vacuum synchronous roller in a matched mode so as to glue the corrugated face of the corrugated paper. An upper guide roller is rotationally arranged above the upper rubber roller, and the position of the upper guide roller can be adjusted in the vertical direction; a composite roller is rotationally arranged above the side of the upper guide roller; and the composite roller is used for compounding the glued corrugated paper and the surface paper. According to the corrugated composite structure, composite production of multiple layers of corrugated boards can be completed on one machine, and the production efficiency is high.

Description

Technical Field

[0001] The utility model belongs to the technical field of corrugated equipment and relates to a cold-set multi-layer corrugated paperboard composite structure. Background Art

[0002] Corrugated packaging products are widely used in production and daily life. For example, various types of cartons are first produced on a corrugated machine to produce corrugated cardboard that meets the requirements. Then, the corrugated boxes are made through die-cutting, creasing, stapling, or gluing. In the existing technology, multi-layer corrugated cardboard is generally produced by first producing a single-layer corrugated cardboard, which is then used as the face paper and then combined with the corrugated paper to form a double-layer corrugated cardboard. This production method is inefficient and has high production costs. Furthermore, it is particularly important to note that existing single-face corrugated machines all use thermal machines during production. During the production process, the glue needs to be gelatinized at high temperatures, resulting in a large amount of energy waste. Summary of the Invention

[0003] In response to the above problems, the utility model provides a cold-set multi-layer corrugated cardboard composite structure, which can complete the composite production of multi-layer corrugated cardboard on a single machine with high production efficiency. At the same time, the cold-set production no longer requires high-temperature gelatinization of the glue.

[0004] According to the technical solution of the utility model: a cold-set multi-layer corrugated cardboard composite structure, characterized in that it includes at least two groups of corrugated composite structures arranged in sequence along the corrugated forming direction and a face paper guide roller, wherein the face paper guide roller is arranged on the outside of the corrugated composite structure to guide the face paper;

[0005] Each group of the corrugated composite structure comprises a vacuum synchronous roller, a guide roller is provided in the paper feeding direction of the vacuum synchronous roller to guide the corrugated paper, a gluing roller is provided tangentially to the vacuum synchronous roller, a scraper is provided in conjunction with the gluing roller, a movable gluing roller is provided above the vacuum synchronous roller, the movable gluing roller can be moved between the gluing station and the degumming station, and a composite roller is provided on the side above the movable gluing roller;

[0006] A shaping roller is arranged behind the composite roller along the corrugated composite direction, a first heating component is arranged on the outer surface of the shaping roller, and a second heating component is arranged on the discharge side of the composite roller. The first heating component and the second heating component can heat the corrugated paper and the face paper after gluing and composite.

[0007] As a further improvement of the present invention, the shaping roller includes an inner shaping roller and an outer shaping roller supported on the circumferential surface of the inner shaping roller and rotating synchronously with the inner shaping roller, and the outer shaping roller is made of tempered glass or plastic;

[0008] The inner shaping roller is a metal roller.

[0009] As a further improvement of the present invention, the first heating component includes an arc-shaped shell, and a plurality of arc-shaped partitions are arranged on the inner wall of the arc-shaped shell along the circumferential direction. The arc-shaped partitions extend from one end of the arc-shaped shell to the other end. A first reflective plate is arranged at one end of the arc-shaped partition close to the surface of the shaping roller, and the first reflective plate is arranged at an angle.

[0010] As a further improvement of the present invention, the arc-shaped partition divides the inner cavity of the arc-shaped shell into a first arc-shaped heating cavity, a second arc-shaped heating cavity, a third arc-shaped heating cavity, a fourth arc-shaped heating cavity, and a fifth arc-shaped heating cavity. The first arc-shaped heating cavity, the second arc-shaped heating cavity, the third arc-shaped heating cavity, the fourth arc-shaped heating cavity, and the fifth arc-shaped heating cavity are respectively provided with a microwave emitting port.

[0011] As a further improvement of the present invention, the second heating assembly includes a microwave transmitting box, which is constructed of a first microwave box, a second microwave box, a third microwave box, a fourth microwave box, and a fifth microwave box. The first microwave box, the second microwave box, the third microwave box, the fourth microwave box, and the fifth microwave box are respectively provided with a microwave transmitting port, the microwave transmitting box is provided with a material belt channel, and the lower ends of the side walls of the second microwave box and the third microwave box are respectively provided with a second reflecting plate.

[0012] As a further improvement of the present invention, the guide roller includes an upper guide roller and a lower guide roller, and the upper guide roller is arranged above the lower guide roller.

[0013] As a further improvement of the present invention, the scraper is installed on the scraper bracket and the angle of the scraper can be adjusted. A glue bucket is formed between the scraper, the scraper bracket, the scraper side plate and the upper glue roller. A constant temperature chamber is provided on the scraper bracket to heat the glue bucket.

[0014] The technical effects of the present invention are as follows: the product structure of the present invention is reasonable and ingenious, and targeted improvements are made to the problems existing in the production of the prior art; by arranging multiple corrugated composite structures on one production line, it can be achieved that during production, one production line can produce multiple layers of corrugated cardboard, which can effectively improve production efficiency and produce corrugated cardboard that meets the requirements; the structure of the present application is reasonable, and corrugated cardboard that meets the requirements can be produced efficiently and quickly during production; during the production process of the present invention, there is no need to use a heat machine to gelatinize the glue at high temperature. The first heating component and the second heating component in the product of the present invention are not the heating structures of the traditional corrugated heat machine. The first heating component and the second heating component in the present application do not need to be started under normal production conditions; their main function is to make the product of the present application suitable for environments with high external humidity, such as coastal areas, the Jiangnan region during the rainy season, and other areas with high humidity. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] Figure 1 It is a structural diagram of the present utility model.

[0016] Figure 2 Schematic diagram of the cross-sectional structure of the second heating component.

[0017] Figure 3 It is a structural schematic diagram of the first heating component and the shaping roller. DETAILED DESCRIPTION

[0018] The specific embodiments of the present invention will be further described below with reference to the accompanying drawings.

[0019] In order to enable those skilled in the art to better understand the solutions of the present invention, the technical solutions in the embodiments of the present invention will be clearly and completely described below in conjunction with the drawings in the embodiments of the present invention. The embodiments described are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without making creative efforts should fall within the scope of protection of the present invention.

[0020] Figure 1-3 It includes a facial paper guide roller 1, a movable rubber roller 2, a rubber roller 3, a vacuum synchronous roller 4, a shaping roller 5, an inner shaping roller 5-1, an outer shaping roller 5-2, a corrugated paper 6, a second heating component 7, a first microwave box 7-1, a second microwave box 7-2, a third microwave box 7-3, a fourth microwave box 7-4, a fifth microwave box 7-5, a second reflecting plate 7-6, a material belt channel 7-7, a composite roller 8, an upper guide roller 9, a lower guide roller 10, a scraper 11, facial paper 12, a first heating component 13, an arc-shaped shell 13-1, an arc-shaped partition 13-2, a first reflecting plate 13-3, etc.

[0021] like Figure 1-3 As shown, the utility model is a cold-set multi-layer corrugated cardboard composite structure, including at least two groups of corrugated composite structures arranged in sequence along the corrugated forming direction and a face paper guide roller 1, wherein the face paper guide roller 1 is arranged on the outside of the corrugated composite structure to guide the face paper 12.

[0022] Each group of the corrugated composite structure includes a vacuum synchronous roller 4. A guide roller is set in the paper feeding direction of the vacuum synchronous roller 4 to guide the corrugated paper 6. A gluing roller 3 is set tangentially to the vacuum synchronous roller 4. The gluing roller 3 is equipped with a scraper 11. A movable rubber roller 2 is set above the vacuum synchronous roller 4. The movable rubber roller 2 can move between the gluing station and the degumming station. A composite roller 8 is set above the movable rubber roller 2. During operation, the surface of the vacuum synchronous roller 4 can also be coated with a graphene layer to slightly heat the corrugated paper after gluing.

[0023] A shaping roller 5 is arranged behind the composite roller 8 along the corrugated composite direction, and a first heating component 13 is arranged on the outer surface of the shaping roller 5. A second heating component 7 is arranged on the discharge side of the composite roller 8. The first heating component 13 and the second heating component 7 can heat the corrugated paper 6 and the face paper 12 after gluing and composite.

[0024] The shaping roller 5 includes an inner shaping roller 5-1 and an outer shaping roller 5-2 supported on the circumferential surface of the inner shaping roller 5-1 and rotating synchronously with the inner shaping roller 5-1. The outer shaping roller 5-2 is made of tempered glass or plastic, and can also be made of microwave conductive materials such as polytetrafluoroethylene and polyethylene.

[0025] The inner shaping roller 5-1 is a metal roller.

[0026] The first heating assembly 13 includes an arcuate housing 13-1. The inner wall of the arcuate housing 13-1 is provided with a plurality of arcuate partitions 13-2 along the circumference. The arcuate partitions 13-2 extend from one end of the arcuate housing 13-1 to the other end. A first reflector 13-3 is provided at one end of the arcuate partition 13-2, which is adjacent to the surface of the sizing roller 5. The first reflector 13-3 is arranged at an angle. It will be appreciated that the wrap angle of the first heating assembly 13 around the surface of the sizing roller 5 can be adjusted according to specific usage.

[0027] The arc-shaped partition 13-2 divides the inner cavity of the arc-shaped shell 13-1 into a first arc-shaped heating cavity, a second arc-shaped heating cavity, a third arc-shaped heating cavity, a fourth arc-shaped heating cavity, and a fifth arc-shaped heating cavity. The first arc-shaped heating cavity, the second arc-shaped heating cavity, the third arc-shaped heating cavity, the fourth arc-shaped heating cavity, and the fifth arc-shaped heating cavity are respectively provided with microwave emitting ports.

[0028] The second heating assembly 7 includes a microwave transmitting box, which is constructed of a first microwave box 7-1, a second microwave box 7-2, a third microwave box 7-3, a fourth microwave box 7-4, and a fifth microwave box 7-5. The first microwave box 7-1, the second microwave box 7-2, the third microwave box 7-3, the fourth microwave box 7-4, and the fifth microwave box 7-5 are respectively provided with microwave transmitting ports, and the microwave transmitting box is provided with a material belt channel 7-7. The lower ends of the side walls of the second microwave box 7-2 and the third microwave box 7-3 are respectively provided with second reflecting plates 7-6, and the material belt passing through the material belt channel 7-7 does not absorb microwaves.

[0029] The guide rollers include an upper guide roller 9 and a lower guide roller 10, and the upper guide roller 9 is arranged above the lower guide roller 10. The first reflector 13-3 and the second reflector 7-6 are used to reflect microwaves to prevent microwave leakage.

[0030] The scraper 11 is mounted on the scraper bracket, and the angle of the scraper 11 can be adjusted. A glue bucket is formed between the scraper 11, the scraper bracket, the scraper side plate, and the glue roller 3. The scraper bracket is provided with a constant temperature chamber to heat the glue bucket. In actual production practice, the present application adopts a double scraper structure. The upper scraper acts as a filter to ensure that the glue flowing to the lower scraper is free of impurities. The lower scraper 11 can control the amount of glue to ensure uniform gluing, enabling reliable and accurate gluing of subsequent processes. By changing the angle of the glue scraper, more uniform gluing can be achieved, and impurities in the glue can be filtered to achieve precise control of gluing.

[0031] During operation, the initial viscosity of the adhesive is 1000 centipoise. This viscosity allows for a preliminary bond between the two layers of paper during lamination, preventing them from shifting during dynamic operation. After the two layers of paper are initially bonded, they are microwaved for approximately 60 seconds (this time varies depending on the humidity of the paper and the air). Once the moisture from the adhesive has penetrated the paper and reached initial strength, the next step can be carried out.

[0032] It is understood that, in addition to microwave heating, the first heating assembly 13 and the second heating assembly 7 of the present invention can also utilize electromagnetic or graphene heating to evaporate the moisture in the glue after gluing the corrugated paper 6. Under normal circumstances, the moisture content in the glue will not exceed the standard for cardboard products. The industry standard for the minimum moisture content is 14% ± 2%. During operation, the present invention uses a glue with a moisture content of approximately 26% (solid content 74%). Under normal circumstances, if the base paper has a moisture content of 8%,

[0033] In actual production practice, 5 layers of cardboard are produced using 700 grams of base paper and 4 layers of glue; each layer contains about 25 grams of glue. During the production process, high-solid-content glue is used. For example, if 70% solid-content glue is used, 30 grams of water is added to produce 5 layers of cardboard. If 74% solid-content glue is used, 26 grams of water is added to produce 5 layers of cardboard. The total amount of 4% water plus 8% water of the base paper gives a moisture content of 12%, which is within the specified range. The first heating component 13 and the second heating component 7 set in the product of the utility model do not need to be started under normal production conditions. Due to China's vast territory, in coastal areas, areas with high humidity, and the Jiangnan region during the rainy season, in order to ensure that the moisture content of the corrugated cardboard meets the requirements, the first heating component 13 and the second heating component 7 need to be started during production operations. In other conventional production environments, since the cold-setting corrugated cardboard production line uses glue, thermal heating is not required.

[0034] A first heating assembly 13 is mounted on the shaping roller 5. In practice, the first heating assembly 13 can utilize a graphene or electromagnetic heating structure. Specifically, the present application utilizes microwave heating, which can be controlled based on the width of the door, effectively saving energy. Furthermore, the micro-temperature reduces the time required for the glue to penetrate and cure, increasing production speed. Because the most active temperature for water molecules in water-based glue is 37 degrees Celsius, the glue and water molecules are more easily penetrated, making the effect more pronounced in winter and in northern workshops. For the next step, entering the microwave environment allows the microwaves to achieve their maximum effect in a short period of time, providing an active environment.

[0035] Through the application of the second heating component 7, the excess water molecules are further volatilized because the energy of the microwave directly acts on the water molecules. Moreover, this structure can choose to turn off the corresponding switch of the microwave box of the second heating component 7 according to the different sizes of the paper, so as to achieve faster curing and higher efficiency, and can effectively solve the two major problems of speed and moisture.

[0036] In the production process of this application, glue for cold-setting corrugated cardboard production line is used. The preparation method of the glue comprises the following steps:

[0037] S1. Select 3 parts of water and 1 part of adhesive by weight and add them to a stirrer, then add an appropriate amount of dispersant and stir evenly, wherein the adhesive is modified starch or self-gelatinized starch; the stirring ball is a reactor, water and adhesive are added to the reactor, and stirred at a speed of 120r / min for 30 minutes;

[0038] S2, add 0.4 parts by weight of catalyst, the catalyst is magnesium sulfate, and stir evenly;

[0039] S3, adding 0.3 parts by weight of an adhesive medium and stirring evenly to achieve affinity between the paper and the glue during use, wherein the adhesive medium is ferrous sulfate;

[0040] S4, adding 5 parts by weight of filler, the filler is calcium carbonate, and stirring evenly;

[0041] S5. Add a desiccant, which is one or more of ethyl acetate, ethanol, propanol, and butanol, and stir evenly to obtain the target glue.

[0042] Finally, it should be noted that the above specific implementation methods are only used to illustrate the technical solution of the utility model and are not limiting. Although the utility model is described in detail with reference to examples, ordinary technicians in this field should understand that the technical solution of the utility model can be modified or replaced by equivalents without departing from the spirit and scope of the technical solution of the utility model, which should be included in the scope of the claims of the utility model.

Claims

1. A cold-set multi-layer corrugated cardboard composite structure, characterized by: It comprises at least two groups of corrugated composite structures arranged in sequence along the corrugated forming direction and a face paper guide roller (1), wherein the face paper guide roller (1) is arranged outside the corrugated composite structure to guide the face paper (12); Each group of the corrugated composite structures comprises a vacuum synchronous roller (4), a guide roller is provided in the paper feeding direction of the vacuum synchronous roller (4) to guide the corrugated paper (6), a gluing roller (3) is provided in a rolling tangent relationship with the vacuum synchronous roller (4), a scraper (11) is provided in conjunction with the gluing roller (3), a movable gluing roller (2) is provided above the vacuum synchronous roller (4), the movable gluing roller (2) can be moved between the gluing station and the degumming station, and a composite roller (8) is provided on the upper side of the movable gluing roller (2); A shaping roller (5) is provided behind the composite roller (8) along the corrugated composite direction, a first heating component (13) is provided on the outer surface of the shaping roller (5), and a second heating component (7) is provided on the discharge side of the composite roller (8). The first heating component (13) and the second heating component (7) can heat the corrugated paper (6) and the face paper (12) after gluing and composite.

2. The cold-set multi-layer corrugated cardboard composite structure according to claim 1, characterized in that: The shaping roller (5) comprises an inner shaping roller (5-1) and an outer shaping roller (5-2) supported on the circumferential surface of the inner shaping roller (5-1) and rotating synchronously with the inner shaping roller (5-1), wherein the outer shaping roller (5-2) is made of tempered glass or plastic; The inner shaping roller (5-1) is a metal roller.

3. The cold-set multi-layer corrugated cardboard composite structure according to claim 1, characterized in that: The first heating component (13) comprises an arc-shaped shell (13-1), a plurality of arc-shaped partitions (13-2) are arranged on the inner wall of the arc-shaped shell (13-1) along the circumferential direction, the arc-shaped partitions (13-2) extend from one end of the arc-shaped shell (13-1) to the other end, a first reflection plate (13-3) is arranged at one end of the arc-shaped partition (13-2) close to the surface of the shaping roller (5), and the first reflection plate (13-3) is arranged at an angle.

4. The cold-set multi-layer corrugated cardboard composite structure according to claim 3, characterized in that: The arc-shaped partition (13-2) divides the inner cavity of the arc-shaped shell (13-1) into a first arc-shaped heating cavity, a second arc-shaped heating cavity, a third arc-shaped heating cavity, a fourth arc-shaped heating cavity, and a fifth arc-shaped heating cavity; the first arc-shaped heating cavity, the second arc-shaped heating cavity, the third arc-shaped heating cavity, the fourth arc-shaped heating cavity, and the fifth arc-shaped heating cavity are respectively provided with a microwave emission port.

5. The cold-set multi-layer corrugated cardboard composite structure according to claim 1, characterized in that: The second heating assembly (7) includes a microwave emission box, which is constructed with a first microwave box (7-1), a second microwave box (7-2), a third microwave box (7-3), a fourth microwave box (7-4), and a fifth microwave box (7-5). The first microwave box (7-1), the second microwave box (7-2), the third microwave box (7-3), the fourth microwave box (7-4), and the fifth microwave box (7-5) are respectively provided with a microwave emission port, the microwave emission box is provided with a material belt channel (7-7), and the lower ends of the side walls of the second microwave box (7-2) and the third microwave box (7-3) are respectively provided with a second reflecting plate (7-6).

6. The cold-set multi-layer corrugated cardboard composite structure according to claim 1, characterized in that: The guide rollers comprise an upper guide roller (9) and a lower guide roller (10), wherein the upper guide roller (9) is arranged above the lower guide roller (10).

7. The cold-set multi-layer corrugated cardboard composite structure according to claim 1, characterized in that: The scraper (11) is mounted on the scraper bracket, and the angle of the scraper (11) can be adjusted. A glue bucket is formed between the scraper (11), the scraper bracket, the scraper side plate and the glue roller (3). A constant temperature chamber is provided on the scraper bracket to heat the glue bucket.

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