Multipurpose gluing machine

Abstract

The invention discloses a multipurpose gluing machine which comprises a rack and a gluing device arranged in the rack, the rack is provided with a plurality of paper guide rollers, and the trend of raw paper can be guided according to different requirements. The gluing device comprises a gluing roller, a driving mechanism and a glue disc and is further provided with a paper pressing roller, a glue scraping roller, a glue scraping plate and the like, and the gap adjusting mechanism can adjust the gap between the glue scraping roller and the gluing roller. The gluing machine can realize three functions of gluing the upper surface of the body paper, gluing the lower surface of the body paper and compounding double-layer body paper. According to the gluing device, multiple purposes are achieved, multiple gluing and compounding requirements are met, the gluing amount can be controlled, and the gluing quality and efficiency can be improved.

Description

TECHNICAL FIELD

[0001] The present application relates to the field of base paper gluing and compounding, in particular to a multipurpose gluing machine. BACKGROUND

[0002] In the current field of corrugated paperboard production lines, with the continuous changes in market demand, the order structure is increasingly complex, and customers' demand for corrugated paperboard products is increasingly diversified. The emergence of various niche orders, such as paper box orders for seafood, medicines, special food, etc. that need to be put into a refrigerated warehouse, and heavy-duty paper box orders, etc., puts higher requirements on the adaptability and functionality of the production line. These diversified order demands not only reflect the trend of market diversification, but also prompt packaging plants to constantly seek more efficient and flexible production solutions to enhance their competitiveness in the market.

[0003] In traditional corrugated paperboard production lines, different solutions are adopted for different types of order demands. For orders that require refrigeration, liquid wax or moisture-proof agent needs to be applied on the inner or outer surface of the paper box, and the offline manual application method is usually adopted. This method relies on manual operation and requires a large amount of manpower and time. For orders that produce heavy-duty paper boxes and require thickening of the paperboard medium or corrugated paper, the common practice is to order special grammage base paper from the base paper factory or to add multiple gluing machines to compound double-layer paper. Ordering special grammage base paper from the base paper factory requires communication and coordination with the supplier, increasing the complexity of the procurement process; adding multiple gluing machines will occupy a large amount of production space and affect the production and paper threading process of regular orders during operation.

[0004] However, the traditional solutions have obvious defects. The offline manual application of liquid wax or moisture-proof agent is inefficient, consumes a large amount of time and labor cost, and cannot meet the demand of large-scale production. Ordering special grammage base paper from the base paper factory will significantly increase the cost in the case of small quantity, as the base paper factory often charges a higher fee for small batch orders. Adding multiple gluing machines not only occupies a large area, but also affects the production and paper threading operation of regular orders, and the equipment investment cost is high. Since the quantity of niche orders is generally small, the utilization rate of multiple gluing machines is very low, resulting in waste of resources. SUMMARY

[0005] In order to improve the gluing efficiency and applicability of the gluing machine, and reduce the equipment cost and space occupancy, the present application provides a multipurpose gluing machine.

[0006] The multipurpose gluing machine provided by the present application adopts the following technical solution: The utility model provides a multipurpose gluing machine, comprising a frame and a gluing device arranged in the frame, the gluing device is used for gluing base paper, the frame is provided with a first lower layer paper guide roller and a second lower layer paper guide roller located at the lower side of the gluing device, and is provided with a first upper layer paper guide roller and a second upper layer paper guide roller located at the upper side of the gluing device, When used for gluing the upper surface of base paper, the base paper is guided by the first lower layer paper guide roller, the second lower layer paper guide roller and the second upper layer paper guide roller in sequence and enters the gluing device in a state with the upper surface facing down, the gluing device glues the upper surface of the base paper, and the base paper after gluing is completed is guided by the first upper layer paper guide roller to complete paper ejection and enter the next process; When used for gluing the lower surface of base paper, the base paper is guided by the first upper layer paper guide roller and enters the gluing device in a state with the lower surface facing down, the gluing device glues the lower surface of the base paper, and the base paper after gluing is completed is guided by the second upper layer paper guide roller to complete paper ejection and enter the next process; When used for double-layer base paper compounding, base paper A enters the paper ejection port of the frame in sequence by being guided by the first lower layer paper guide roller and the second lower layer paper guide roller, base paper B enters the gluing device in a state with the lower surface facing down by being guided by the first upper layer paper guide roller, the gluing device glues the lower surface of base paper B, and the base paper B after gluing is completed enters the paper ejection port of the frame by being guided by the second upper layer paper guide roller and is attached to base paper A.

[0007] By adopting the technical scheme, the upper and lower distribution of the first lower layer paper guide roller, the second lower layer paper guide roller, the first upper layer paper guide roller and the second upper layer paper guide roller is combined and arranged, and the gluing device is cooperatively operated, three core functions are realized: when the upper surface of base paper is glued, the paper guide roller guides the base paper to contact the gluing device in a specific overturning path, ensuring accurate coverage of the gluing surface; when the lower surface of base paper is glued, the paper guide path directly positions the lower surface to contact the gluing device, simplifying the operation process; when double-layer base paper is compounded, base paper A and the glued base paper B are attached at the paper ejection port by being guided synchronously, avoiding extra occupation of production space. The design integrates multiple functions by a single device, solves the problems of manual coating, ordering of special base paper or adding multiple devices in the traditional process, significantly improves the adaptability to niche orders and reduces the cost of equipment.

[0008] Preferably, the gluing device comprises a gluing roller for gluing, a driving mechanism for driving the gluing roller to rotate and a glue tray for storing glue, the lower part of the gluing roller is immersed in the glue in the glue tray; the base paper contacts the upper part of the gluing roller when entering the gluing device; when the base paper is glued, the gluing roller coats the glue in the glue tray to the surface of the base paper under the driving of the driving mechanism.

[0009] By adopting the technical scheme, the structure that the glue roller is immersed in the glue disc realizes continuous glue supply, the driving mechanism drives the glue roller to rotate to adhere glue, and coating is realized by contacting with the base paper. The structure simplifies the glue transmission process, uniformly applies glue by the rotating action of the roller, ensures the continuity and stability of the glue layer coverage, and improves the glue application efficiency.

[0010] Preferably, the rack is provided with a paper pressing roller above the glue roller and a lifting assembly for adjusting the height of the paper pressing roller, and the base paper contacts with the glue roller under the pressing action of the paper pressing roller.

[0011] By adopting the technical scheme, the paper pressing roller presses the base paper under the adjustment of the lifting assembly, and the contact pressure of the base paper and the glue roller is forced to be controlled, so that the uneven glue application caused by the tension fluctuation of the base paper is avoided. The lifting assembly can adapt to the coating requirements of base papers with different thicknesses, and ensures the uniformity of the glue layer thickness.

[0012] Preferably, the rack is provided with a glue scraping roller and a gap adjusting mechanism, the glue scraping roller is distributed side by side with the glue roller, the glue scraping roller is used to scrape the excess glue on the surface of the glue roller, and the gap adjusting mechanism is used to adjust the gap width between the glue scraping roller and the glue roller to control the glue amount on the surface of the glue roller.

[0013] By adopting the technical scheme, the glue scraping roller is arranged side by side with the glue roller and the distance is controlled by the gap adjusting mechanism, and the excess glue on the surface of the glue roller is accurately removed by the scraping action. The dynamic adjustment of the gap width directly determines the glue carrying amount of the glue roller, realizes the fine control of the glue layer thickness, and avoids overcoating or insufficient coating.

[0014] Preferably, the rack is provided with a glue scraping plate, and the glue scraping plate is used to scrape the excess glue on the surface of the glue scraping roller.

[0015] By adopting the technical scheme, the glue scraping plate scrapes the surface of the glue scraping roller, further removes the residual glue adhered to the glue scraping roller, prevents the glue from accumulating or drying between the rollers, and ensures that the glue scraping roller always maintains the cleaning and effective scraping function.

[0016] Preferably, a glue isolation baffle device is arranged in the rack, the glue isolation baffle device extends into the glue storage space of the glue disc, and is used to adjust the width of the glue storage space of the glue disc, so as to set the glue in the glue storage space of the glue disc within the width of the base paper glue application range.

[0017] By adopting the technical scheme, the width of the glue storage space of the glue disc is adjusted by the glue isolation baffle device, so as to set the glue in the glue storage space of the glue disc within the width of the base paper glue application range, and the excess paste sticking to the paper edge affects the subsequent production process.

[0018] Preferably, the gap adjusting mechanism comprises an eccentric gear, a driving gear and an adjusting driving element, the eccentric gear and the driving gear are both rotationally connected to the side of the frame and are in mesh with each other, and the adjusting driving element is used to drive the driving gear to rotate; the eccentric shaft of the eccentric gear is coaxially arranged with the rotating shaft of the glue roller, and the position of the glue roller is adjusted under the driving action of the adjusting driving element and the meshing transmission action of the driving gear and the eccentric gear, so as to adjust the gap width between the glue roller and the upper roller.

[0019] By adopting the above technical scheme, the driving gear drives the eccentric gear to rotate, the eccentric gear drives the eccentric shaft to change the position, and the precise transmission characteristics of the gear meshing are used to realize the fine adjustment of the gap width. The gear rotation is converted into the linear displacement of the glue roller through the eccentric structure, and the accuracy and reliability of the gap adjustment are improved.

[0020] Preferably, the driving mechanism comprises a first synchronous wheel coaxially and fixedly connected with the upper roller, a second synchronous wheel coaxially and fixedly connected with the glue roller, a third synchronous wheel rotationally connected with the side of the frame, a synchronous belt for transmission, and a main driving element for driving the third synchronous wheel to rotate, and the synchronous belt is sleeved between the first synchronous wheel, the second synchronous wheel and the third synchronous wheel.

[0021] By adopting the above technical scheme, the main driving element is synchronously transmitted to the first synchronous wheel (upper roller) and the second synchronous wheel (glue roller) through the third synchronous wheel and the synchronous belt, so as to ensure that the rotating speeds of the two rollers are strictly synchronized. This design avoids the problems of glue amount control failure or uneven glue scraping caused by speed difference, and ensures the stable operation of the gap adjusting function.

[0022] In summary, the present application has at least one of the following beneficial technical effects: 1. It meets various gluing scenes, can glue the upper surface and the lower surface of the base paper, and can also realize double-layer base paper compounding, thereby reducing the equipment investment cost; 2. It solves the problem that the traditional production line cannot adapt to various gluing demands, and improves the manufacturing capacity of the packaging factory; 3. It avoids adding multiple gluing machines, reduces the floor area, and does not affect the conventional order production and paper threading operation. BRIEF DESCRIPTION OF DRAWINGS

[0023] Figure 1 is a schematic diagram of the internal structure distribution of a multipurpose gluing machine according to an embodiment of the present application.

[0024] Figure 2 is a schematic diagram of the distribution of the driving mechanism and the glue amount adjusting mechanism in a multipurpose gluing machine according to an embodiment of the present application.

[0025] Figure 3 is a schematic diagram of the driving mechanism and the glue amount adjusting mechanism in a multipurpose gluing machine according to an embodiment of the present application.

[0026] Figure 4 is a position schematic view between the glue blocking baffle device and the glue disc in a multipurpose gluing machine according to an embodiment of the application.

[0027] Figure 5 is a state schematic view when the upper surface of the raw paper is glued in a multipurpose gluing machine according to an embodiment of the application.

[0028] Figure 6 is a state schematic view when the lower surface of the raw paper is glued in a multipurpose gluing machine according to an embodiment of the application.

[0029] Figure 7 is a state schematic view when the double-layer raw paper is compounded in a multipurpose gluing machine according to an embodiment of the application.

[0030] Legend: 1, frame; 11, first lower layer paper guide roller; 12, second lower layer paper guide roller; 13, second upper layer paper guide roller; 14, first upper layer paper guide roller; 15, paper pressing roller; 2, gluing roller; 3, glue scraping roller; 4, glue disc; 41, glue storage space; 5, glue blocking baffle device; 51, side baffle; 511, arc-shaped avoiding groove; 52, screw transmission mechanism; 53, guide rod; 6, lifting assembly; 7, glue scraping plate; 8, driving mechanism; 81, main driving piece; 82, third synchronous wheel; 83, first synchronous wheel; 84, second synchronous wheel; 85, synchronous belt; 86, tension wheel; 9, gap adjusting mechanism; 91, adjusting driving piece; 92, transmission gear; 93, eccentric gear; 931, eccentric shaft. DETAILED DESCRIPTION

[0031] The following will be described in detail with reference to the accompanying drawings. Figures 1-7 The application will be further described in detail.

[0032] The embodiment of the application discloses a multipurpose gluing machine, which will be described in detail with reference to the accompanying drawings. Figure 1 and Figure 2, including a rack 1, a gluing device, a first lower layer paper guide roller 11, a second lower layer paper guide roller 12, a first upper layer paper guide roller 14, and a second upper layer paper guide roller 13. The rack 1 provides support and mounting basis for the entire device. The rack 1 is movable and can be pushed away when not in use, thus not occupying space on the paperboard production line and not affecting the production and paper feeding operation of regular orders. The gluing device is arranged in the rack 1 for gluing the base paper. The first lower layer paper guide roller 11 and the second lower layer paper guide roller 12 are arranged in the rack 1 below the gluing device. The first upper layer paper guide roller 14 and the second upper layer paper guide roller 13 are arranged in the rack 1 above the gluing device. Through the guidance of these paper guide rollers, the base paper can enter the gluing device according to different paths to meet different gluing needs and adapt to various gluing scenarios. This is because different paper guide paths can adjust the contact mode of the base paper with the gluing device according to order needs, thus meeting different needs such as gluing the upper surface of the base paper, gluing the lower surface of the base paper, and compounding double-layer base paper.

[0033] Specifically, the gluing device includes a gluing roller 2 for gluing, a driving mechanism 8 for driving the gluing roller 2 to rotate, and a glue tray 4 for storing glue. The glue tray 4 stores glue in the glue storage space 41. The gluing roller 2 is generally cylindrical in structure, and its surface can be made of smooth metal material such as stainless steel, which can ensure uniform adhesion of the glue and is not prone to corrosion. Of course, a rubber material with a specially treated surface can also be used to increase the adsorbability of the glue. The lower part of the gluing roller 2 is immersed in the glue in the glue tray 4, so that it can carry glue when rotating. The glue tray 4 is usually made of metal plate and has a certain depth and volume to store enough glue. Its shape can be rectangular or square, and the specific design is based on the overall layout of the device. The glue tray 4 is slidingly connected in the rack 1 for easy removal, replacement, or cleaning. The glue can be replaced as needed, such as paste, liquid wax, and moisture-proof agent. The driving mechanism 8 is connected with the gluing roller 2 to drive the gluing roller 2 to rotate. When the base paper enters the gluing device, it contacts the upper part of the gluing roller 2. When the base paper is glued, the gluing roller 2 drives the glue in the glue tray 4 to the surface of the base paper under the drive of the driving mechanism 8.

[0034] The rack 1 is provided with a paper pressing roller 15 above the gluing roller 2 and a lifting assembly 6 for adjusting the height of the paper pressing roller 15. The paper pressing roller 15 is also cylindrical in structure and can rotate, and its surface can be wrapped with a layer of soft rubber to avoid damaging the base paper. The lifting assembly 6 can be a screw nut mechanism, and when the screw rod rotates, the nut moves up and down to adjust the height of the paper pressing roller 15. A vertical air cylinder can also be used to change the height of the paper pressing roller 15 by extending and retracting. The base paper contacts the gluing roller 2 under the pressing action of the paper pressing roller 15, which can ensure that the base paper is in full contact with the gluing roller 2, making the gluing more uniform.

[0035] With reference to Figure 2 and Figure 3 , the rack 1 is provided with a glue scraping roller 3 and a gap adjusting mechanism 9. The glue scraping roller 3 is rotatable and distributed in parallel with the glue applying roller 2, and has a structure and material similar to the glue applying roller 2. The glue scraping roller 3 is used to scrape the excess glue on the surface of the glue applying roller 2, so as to ensure the uniformity and accuracy of the glue application. The gap adjusting mechanism 9 is used to adjust the gap width between the glue scraping roller 3 and the glue applying roller 2, so as to control the amount of glue on the surface of the glue applying roller 2.

[0036] The gap adjusting mechanism 9 includes an eccentric gear 93, a driving gear and an adjusting driving element 91. The eccentric gear 93 and the driving gear 92 are both rotatably connected to the side of the rack 1 and mesh with each other. The eccentric shaft 931 of the eccentric gear 93 is coaxially rotatably connected with the rotating shaft of the glue scraping roller 3. The adjusting driving element 91 can be a speed reducer motor, and the output shaft thereof is connected with the driving gear 92. When the adjusting driving element 91 works, the driving gear is driven to rotate, and the position of the glue scraping roller 3 is adjusted through the meshing transmission of the driving gear and the eccentric gear 93, so as to adjust the gap width between the glue scraping roller 3 and the glue applying roller 2.

[0037] The driving mechanism 8 includes a first synchronous wheel 83 coaxially fixedly connected with the glue applying roller 2, a second synchronous wheel 84 coaxially fixedly connected with the glue scraping roller 3, a third synchronous wheel 82 rotatably connected with the side of the rack 1, a synchronous belt 85 for transmission, and a main driving element 81 for driving the third synchronous wheel 82 to rotate. The synchronous wheel is generally made of cast iron or aluminum alloy material, and has a toothed structure on the surface to ensure the meshing transmission with the synchronous belt 85. The synchronous belt 85 is made of rubber material, and has reinforcing ribs inside to improve its strength and transmission efficiency. The main driving element 81 can be a variable frequency motor, and the rotating speed of the variable frequency motor can be controlled to adjust the rotating speed of the glue applying roller 2 and the glue scraping roller 3. The synchronous belt 85 is sleeved between the first synchronous wheel 83, the second synchronous wheel 84 and the third synchronous wheel 82 and is in meshing transmission, so as to realize the synchronous rotation of the glue applying roller 2 and the glue scraping roller 3. In addition, when the gap adjusting mechanism 9 adjusts the position of the glue scraping roller 3, the distance between the second synchronous wheel 84 and the first synchronous wheel 83 also changes accordingly, and the synchronous belt 85 also becomes loose. Therefore, a tensioning wheel 86 for pressing the synchronous belt 85 and a tensioning cylinder for driving the tensioning wheel 86 to move are arranged on the side of the rack 1, so that the synchronous belt 85 and the first synchronous wheel 83, the second synchronous wheel 84 and the third synchronous wheel 82 remain in stable meshing state. Further, the stability of the transmission is ensured.

[0038] With reference to Figure 1The rack 1 is provided with a glue scraping plate 7, which is usually made of hard plastic or metal, such as aluminum alloy. Its shape can be long strip-shaped, and the edge is polished to ensure that the excess glue on the surface of the glue scraping roller 3 can be effectively scraped off. The glue scraping plate 7 is installed on the rack 1 and is located close to the glue scraping roller 3. When the glue scraping roller 3 rotates, the glue scraping plate 7 can scrape off the excess glue. In addition, glue scraping plates 7 can be added at the corresponding positions of the first upper layer paper guide roller 14 and the second upper layer paper guide roller 13 to scrape off the glue on the surfaces of the first upper layer paper guide roller 14 and the second upper layer paper guide roller 13, thereby maintaining the cleanliness of the surfaces of the paper guide rollers.

[0039] With reference to Figure 1 and Figure 4 , the paper inlet of the rack 1 is provided with a glue blocking baffle device 5, which includes a guide rod 53, two side baffles 51, and two groups of screw drive mechanisms 52. The guide rod 53 is parallel to the first upper layer paper guide roller 14. The two vertically arranged side baffles 51 are slidingly connected to the guide rod 53, and both of them extend into the glue storage space 41 of the glue tray 4. The two ends of each side baffle 51 abut against the front and rear fixed plates of the glue tray 4, respectively, so as to finally divide the inside of the glue tray 4 into three compartments. The middle compartment serves as the glue storage space 41 of the glue tray 4, and the distance between the two side baffles 51 determines the width of the glue storage space 41 of the glue tray 4. The top of each side baffle 51 is provided with an arc-shaped avoiding groove 511 that is adapted to the lower part of the glue applying roller 2. The inner wall of the groove 511 abuts against the lower part of the glue applying roller 2 to avoid the generation of gaps that may cause glue leakage and to ensure that the lower part of the glue applying roller 2 can be immersed in the glue. In addition, the two groups of screw drive mechanisms 52 correspond to the two side baffles 51, respectively. The screw drive mechanism 52 is a displacement adjusting mechanism commonly used in the mechanical field, which is used to drive the corresponding baffle to move along the length direction of the guide rod 53. The two screw drive mechanisms 52 adjust the distance and relative position between the two side baffles 51, thereby adjusting the width of the glue storage space 41 of the glue tray 4 and the relative position of the glue, and further setting the glue in the glue storage space 41 of the glue tray 4 within the width of the paper.

[0040] With reference to Figure 5 When used for applying glue on the upper surface of the base paper, the base paper passes through the first lower layer paper guide roller 11, the second lower layer paper guide roller 12, and the second upper layer paper guide roller 13 in sequence, and enters the glue applying device in a state with the upper surface facing downward. The glue applying device applies glue on the upper surface of the base paper. After the glue applying is completed, the base paper is guided by the first upper layer paper guide roller 14 to complete the paper output and enter the next process.

[0041] With reference to Figure 6When used for gluing the lower surface of the raw paper, the raw paper is guided by the first upper layer paper guide roller 14 to enter the gluing device in a lower surface downward state, the gluing device glues the lower surface of the raw paper, and the raw paper after gluing is guided by the second upper layer paper guide roller 13 to complete paper ejection and enter the next process.

[0042] With reference to Figure 7 When used for double-layer raw paper compounding, the raw paper A enters the paper ejection port of the rack 1 in sequence through the guidance of the first lower layer paper guide roller 11 and the second lower layer paper guide roller 12; the raw paper B is guided by the first upper layer paper guide roller 14 to enter the gluing device in a lower surface downward state, the gluing device glues the lower surface of the raw paper B, and the raw paper B after gluing is guided by the second upper layer paper guide roller 13 to enter the paper ejection port of the rack 1 and is attached to the raw paper A.

[0043] The implementation principle of the embodiment is that the multi-purpose gluing machine realizes the needs of multiple gluing scenes through reasonable structural design and cooperative work of various components. Its movable property allows it to be placed aside when not in use, without occupying the production line space and affecting regular order production. Through the cooperation of different paper guide paths and gluing devices, it can meet the needs of raw paper upper surface gluing, raw paper lower surface gluing, and double-layer raw paper compounding, etc., greatly reducing equipment investment, improving the production capacity and competitiveness of packaging plants, and solving the problems of low efficiency, high cost, and low equipment utilization rate of manual operation compared with traditional production methods, which is an effective improvement on the prior art.

[0044] The above are preferred embodiments of the present application, but do not limit the protection scope of the present application, therefore: any equivalent changes made on the structure, shape, principle of the present application should be covered within the protection scope of the present application.

[0045] The above are preferred embodiments of the present application, but do not limit the protection scope of the present application, therefore: any equivalent changes made on the structure, shape, principle of the present application should be covered within the protection scope of the present application.

Claims

1. A multi-purpose gumming machine characterized in that: The application relates to a paper machine frame (1) and a paper sizing device arranged in the frame (1) for sizing raw paper; the frame (1) is provided with a first lower layer paper guide roller (11) and a second lower layer paper guide roller (12) arranged below the paper sizing device and a first upper layer paper guide roller (14) and a second upper layer paper guide roller (13) arranged above the paper sizing device. When the upper surface of the raw paper is sized, the raw paper is guided by the first lower layer paper guide roller (11), the second lower layer paper guide roller (12) and the second upper layer paper guide roller (13) in sequence and enters the paper sizing device in a state with the upper surface downward, the paper sizing device sizes the upper surface of the raw paper, and the sized raw paper is guided by the first upper layer paper guide roller (14) to complete paper ejection and enter the next process. When the lower surface of the raw paper is sized, the raw paper is guided by the first upper layer paper guide roller (14) and enters the paper sizing device in a state with the lower surface downward, the paper sizing device sizes the lower surface of the raw paper, and the sized raw paper is guided by the second upper layer paper guide roller (13) to complete paper ejection and enter the next process. When double-layer raw paper is compounded, raw paper A enters the paper ejection port of the frame (1) by being guided by the first lower layer paper guide roller (11) and the second lower layer paper guide roller (12) in sequence; raw paper B enters the paper sizing device in a state with the lower surface downward by being guided by the first upper layer paper guide roller (14), the paper sizing device sizes the lower surface of the raw paper B, and the sized raw paper B enters the paper ejection port of the frame (1) by being guided by the second upper layer paper guide roller (13) and is attached to the raw paper A.

2. A multi-purpose gumming machine as claimed in claim 1, wherein: The paper sizing device comprises a sizing roller (2) for applying glue, a driving mechanism (8) for driving the sizing roller (2) to rotate and a glue tray (4) for storing glue; a glue storage space (41) is arranged in the glue tray (4) for storing glue, the lower part of the sizing roller (2) is immersed in the glue in the glue storage space (41) of the glue tray (4); the raw paper contacts the upper part of the sizing roller (2) when entering the paper sizing device; when the raw paper is sized, the glue in the glue tray (4) is applied to the surface of the raw paper by the sizing roller (2) under the driving of the driving mechanism (8).

3. A multi-purpose gumming machine as claimed in claim 1, wherein: The frame (1) is provided with a paper pressing roller (15) arranged above the sizing roller (2) and a lifting assembly (6) for adjusting the height of the paper pressing roller (15); the raw paper contacts the sizing roller (2) under the pressing action of the paper pressing roller (15).

4. The multi-purpose gluing machine according to claim 1, characterized in that: The frame (1) is provided with a glue scraping roller (3) and a gap adjusting mechanism (9); the glue scraping roller (3) is arranged side by side with the sizing roller (2); the glue scraping roller (3) is used for scraping the excess glue on the surface of the sizing roller (2); the gap adjusting mechanism (9) is used for adjusting the gap width between the glue scraping roller (3) and the sizing roller (2) to control the glue amount on the surface of the sizing roller (2).

5. A multi-purpose gumming machine as claimed in claim 4, characterized in that: The frame (1) is provided with a glue scraping plate (7) for scraping the excess glue on the surface of the glue scraping roller (3).

6. A multi-purpose gumming machine as claimed in claim 5, characterized in that: The glue blocking baffle device (5) is arranged in the frame (1), extends into the glue storage space (41) of the glue tray (4), and is used for adjusting the width of the glue storage space (41) of the glue tray (4) to set the glue in the glue storage space (41) of the glue tray (4) within the width of the paper gluing range.

7. A multi-purpose gumming machine as claimed in claim 4, wherein: The gap adjusting mechanism (9) comprises an eccentric gear (93), a driving gear (92) and an adjusting driving element (91), the eccentric gear (93) and the driving gear (92) are both rotationally connected to the side of the frame (1) and are in engagement with each other, and the adjusting driving element (91) is used for driving the driving gear (92) to rotate; the eccentric shaft (931) of the eccentric gear (93) is coaxially arranged with the rotating shaft of the glue scraping roller (3), and the position of the glue scraping roller (3) is adjusted under the driving action of the adjusting driving element (91) and the meshing transmission action of the driving gear (92) and the eccentric gear (93), so as to adjust the gap width between the glue scraping roller (3) and the glue applying roller (2).

8. A multi-purpose gumming machine as claimed in claim 7, characterized in that: The driving mechanism (8) comprises a first synchronous wheel (83) fixedly connected with the glue applying roller (2) in a coaxial manner, a second synchronous wheel (84) fixedly connected with the glue scraping roller (3) in a coaxial manner, a third synchronous wheel (82) rotationally connected to the side of the frame (1), a synchronous belt (85) for transmission, and a main driving element (81) for driving the third synchronous wheel (82) to rotate, the synchronous belt (85) is sleeved between the first synchronous wheel (83), the second synchronous wheel (84) and the third synchronous wheel (82) and is in meshing transmission.

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