A glue metering device for a paper mounting machine

Abstract

The purpose of this invention is to provide a glue dispensing device for a paper mounting machine, relating to the field of printing and packaging machinery. The device includes a glue dispensing unit comprising a glue bucket, a glue nozzle, and a collection trough, enabling the glue to adhere more completely and evenly to the anilox roller. A glue coating unit includes a placement plate, a support plate, a mounting plate, and a first feeding belt assembly, which transports the paper above the anilox roller for glue coating. A receiving device includes a limiting plate, a second feeding belt assembly, and a guide plate, ensuring orderly glue coating of the paper. A glue collection device includes a sliding rod, a worm gear, and a stop, which limits the width of the glue between the anilox roller and the glue roller, preventing excess glue from being applied to the paper, avoiding glue overflow during paper mounting, reducing glue waste, and ensuring the quality of paper mounting.

Description

Technical Field

[0001] This invention relates to the field of printing and packaging machinery, and more particularly to a glue dispensing device for a paper mounting machine. Background Technology

[0002] Existing paper mounting machines use anilox rollers to apply glue to the paper. However, to accommodate different paper sizes, the length of the anilox roller is much longer than the paper. When applying glue to the paper, the glue on the rollers at both ends of the anilox roller is not used and is wasted after drying. At the same time, the edges of the paper are easily soaked with glue, causing glue to overflow during the mounting process. This results in glue waste and makes the mounted paper prone to sticking together due to the overflowing glue, ultimately affecting the quality of the mounting.

[0003] For example, CN202110765836.0 proposes an automatic glue adjustment mechanism, which includes two glue-applying wall panels, a glue-applying roller, two glue-adjusting wall panels, two glue-adjusting connecting plates, a glue-adjusting roller, an automatic glue-adjusting worm gear, two automatic glue-adjusting turbines, two supports, two automatic glue-adjusting square teeth, two locking sleeves, an automatic glue-adjusting pulley, a servo motor, and a synchronous belt. This invention uses a servo motor, according to instructions from the control system, to sequentially drive the automatic glue-adjusting pulley, causing the automatic glue-adjusting worm gear, automatic glue-adjusting square teeth, glue-adjusting wall panels, and glue-adjusting connecting plates to move, thus causing the glue-adjusting roller to move horizontally. This achieves precise adjustment of the gap between the glue-adjusting roller and the glue-applying roller, achieving the purpose of automatically adjusting the glue amount. The advantages are simple operation, saving labor and raw materials, reducing workload; automatic data control, efficient and precise adjustment, good consistency, and can effectively improve the working efficiency of the mounting machine and the quality of the mounted products. However, it does not solve the aforementioned problems.

[0004] The present invention can control the width of the glue on the anilox roller through the glue collection device, so that the glue width matches the size of the paper, avoiding glue waste and preventing glue from overflowing from the paper during mounting. Summary of the Invention

[0005] To address the aforementioned problems, the present invention aims to provide a glue metering device for a paper mounting machine. This glue metering device can control the width of the glue on the anilox roller through a glue receiving device, so that the glue width matches the size of the paper, avoiding glue waste and preventing glue from overflowing from the paper during mounting.

[0006] This invention provides a glue dispensing device for a paper mounting machine, comprising a base, an anilox roller, and a glue roller. The base is located on a working plane, with a connecting end at the rear. A mounting seat is mounted on the base via an electric lifting guide rail. The anilox roller is rotatably mounted on the mounting seat, and the glue roller is mounted on the mounting seat. A narrow gap of 1-5mm is left between the anilox roller and the glue roller. The anilox roller has evenly distributed, staggered shallow grooves. A main power motor is mounted on the base. A first guide wheel is located on the side of the base, and a second guide wheel is slidably mounted on the side of the base and connected to the base by a spring. One end of the anilox roller is powered by a drive belt connected to the main power motor. The drive belt is also mounted on the first and second guide wheels. The second guide wheel is kept taut by a spring. The device also includes a glue injection device above the glue roller, a glue coating device above the anilox roller, a receiving device diagonally above the glue coating device, and a glue collection device above the anilox roller and the glue roller.

[0007] Furthermore, the glue dispensing device includes a glue bucket, a glue nozzle, and a collection trough. The glue bucket is placed on one side of the base, and a cover plate is provided on the glue bucket. A liquid pump is provided on the cover plate, which can discharge the glue in the glue bucket through the outlet. A notch is provided on one side of the cover plate, and a connecting plate is provided below the glue nozzle. The connecting plate is fixed on the mounting base. Multiple glue outlets are provided in front of the glue nozzle, and the glue outlets are located between the anilox roller and the glue roller. The outlet of the liquid pump is connected to one side of the glue nozzle through a hose. The collection trough is fixed on the mounting base and is located below the anilox roller and the glue roller. One end of the collection trough passes through the mounting base to the top of the glue bucket. The cross-section of the collection trough is "V" shaped, and a through hole that fits the collection trough is opened on the mounting base.

[0008] Furthermore, the adhesive application device includes a placement plate, a support plate, a mounting plate, and a first feeding belt assembly. The placement plate is fixed on the mounting base and located above the anilox roller. The support plate is fixed on the mounting base and located below the anilox roller. The mounting plate is fixed to the inner side of the upper end of the base. The first feeding belt assembly is mounted on the mounting plate and located above the placement plate, the anilox roller, and the support plate. A motor is fixed on the mounting plate, and the motor output shaft is poweredly connected to the first feeding belt assembly via a transmission belt.

[0009] Furthermore, the support plates are fixed vertically and arranged evenly horizontally.

[0010] Furthermore, the upper surfaces of the placement plate and the support plate are on the same plane, which is tangent to the cross-sectional circle of the anilox roller, and the angle between the plane and the working plane is 35°-50°.

[0011] Furthermore, the receiving device includes a limiting plate, a second feeding belt assembly, and a guide plate. The limiting plate is fixed on the mounting plate and located above the placement plate. The second feeding belt assembly is disposed on the limiting plate and is poweredly connected to the output shaft of the motor on the mounting plate via a transmission belt. The guide plate is rotatably mounted on the limiting plate.

[0012] Furthermore, the upper end of the limiting plate is raised, the guide plate is curved, and the hinge point between the guide plate and the limiting plate is located at 1 / 3-1 / 4 of the upper end of the guide plate.

[0013] Furthermore, the glue collection device includes a slide bar, a worm gear, and a stop block. The slide bar is fixed on the mounting base, the worm gear is rotatably mounted on the mounting base, a motor is provided on the mounting base, the motor output shaft is poweredly connected to the worm gear, and the stop block is mounted on the worm gear and slidably mounted on the slide bar.

[0014] Furthermore, the block has two arc-shaped notches below it, which fit into the anilox roller and the rubber roller respectively. The block has a glue suction hole, and the front of the block is a slope. A slider is slidably installed on the slope. The upper end of the slider is connected to the block by a spring, and the lower end of the slider is fixed with a scraper.

[0015] Furthermore, the suction hole is funnel-shaped, wider at the front and narrower at the back, and the rear end of the suction hole is connected to the inlet of a liquid pump via a flexible tube.

[0016] Beneficial effects: 1. An mounting base is installed on the base via an electric lifting guide rail. An anilox roller is rotatably mounted on the mounting base. A rubber roller is mounted on the mounting base. A mounting plate is fixed to the inner side of the upper end of the base. The first feeding belt assembly is mounted on the mounting plate. A motor is fixed on the mounting plate. The motor output shaft is poweredly connected to the first feeding belt assembly via a transmission belt. The height of the mounting base can be adjusted via the electric lifting guide rail, thereby changing the distance between the anilox roller and the first feeding belt assembly, thus fitting paper of different thicknesses and improving practicality.

[0017] 2. The glue bucket is placed on one side of the base. The glue bucket is equipped with a cover plate, and a liquid pump is installed on the cover plate. An anilox roller is rotatably mounted on the mounting base. The glue roller is mounted on the mounting base. The collection trough is located below the anilox roller and the glue roller. One end of the collection trough passes through the mounting base to the top of the glue bucket. The cross-section of the collection trough is "V". The mounting base has a through hole that fits the collection trough. It can form a trough for temporarily storing glue through the glue roller and the anilox roller, so that the glue can be more completely and evenly adhered to the anilox roller. At the same time, the collection trough below also prevents glue from dripping and being wasted.

[0018] 3. The upper part of the limiting plate is raised, and the guide plate is curved. The hinge point between the guide plate and the limiting plate is located at 1 / 3-1 / 4 of the upper part of the guide plate. The upper part of the guide plate can decelerate and guide the paper transported at high speed, so that the paper can be coated with glue in an orderly manner.

[0019] 4. The slide bar is fixed to the mounting base, and the worm gear is rotatably mounted on the mounting base. The mounting base is equipped with a motor, and the motor output shaft is poweredly connected to the worm gear. A stop block is mounted on the worm gear, and there are two arc-shaped notches below the stop block. The stop block has glue suction holes, and the front of the stop block is a slope. A slider is slidably mounted on the slope, and a scraper is fixed at the lower end of the slider. The stop block can limit the width of the glue between the anilox roller and the glue roller, and can suck out excess glue through the glue suction holes. It can also scrape the glue off the anilox roller through the slider on the stop block and the scraper on the slider, thereby limiting the width of the glue coating on the anilox roller, preventing excess glue from being applied to the paper, avoiding glue overflow during paper mounting, reducing glue waste, and ensuring the quality of paper mounting.

[0020] The realization of the purpose, functional features and advantages of the present invention will be further explained in conjunction with the embodiments and with reference to the accompanying drawings. Attached Figure Description

[0021] Figure 1 This is a schematic diagram of the overall structure of the present invention. Figure 1 .

[0022] Figure 2 This is a schematic diagram of the overall structure of the present invention. Figure 2 .

[0023] Figure 3 This is an exploded view of the present invention.

[0024] Figure 4 This is a schematic diagram of the overall structure of the present invention. Figure 3 .

[0025] Figure 5 This is an exploded view of the placement plate structure of the adhesive coating device of the present invention.

[0026] Figure 6 This is an exploded view of the slider structure of the glue collection device of the present invention.

[0027] Figure 7 This is a cross-sectional view of the slider structure of the glue collection device of the present invention.

[0028] Figure 8 This is a schematic diagram of the overall structure of the receiving device of the present invention. Figure 1 .

[0029] Figure 9 This is a schematic diagram of the overall structure of the receiving device of the present invention. Figure 2 .

[0030] Reference numerals: Base 1; Mounting seat 2; Anilox roller 3; Glue roller 4; Slide bar 5; Worm gear 6; Stop block 7; Slider 8; Scraper 9; Glue suction hole 10; Glue bucket 11; Cover plate 12; Liquid pump 13; Glue nozzle 14; Collection tank 15; Main power motor 16; First guide wheel 17; Second guide wheel 18; Placement plate 19; Support plate 20; Mounting plate 21; First feeding belt group 22; Limiting plate 23; Second feeding belt group 24; Guide plate 25. Detailed Implementation

[0031] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. In order to simplify the disclosure of the present invention, the components and settings of specific examples are described below. Of course, they are just examples and are not intended to limit the present invention.

[0032] The glue dispensing device for a laminating machine according to an embodiment of the present invention will now be described with reference to the accompanying drawings. Figure 1 - Figure 9 As shown, the glue metering device for a paper mounting machine includes a base 1, an anilox roller 3, and a glue roller 4. The base 1 is located on a working plane, and a connecting end is provided at the rear of the base 1 for connecting an external feeding device. A mounting seat 2 is mounted on the base 1 via an electric lifting guide rail. The anilox roller 3 is rotatably mounted on the mounting seat 2, and the glue roller 4 is mounted on the mounting seat 2. A narrow gap of 1-5mm is left between the anilox roller 3 and the glue roller 4. The anilox roller 3 has evenly distributed, staggered shallow grooves. A main drive motor 16 is provided on the base 1, and a first guide wheel 17 is provided on the side of the base 1. The second guide wheel 18 is slidably installed on the side of the base 1 and is connected to the base 1 by a spring. One end of the anilox roller 3 is powered by the main motor 16 via a transmission belt. The transmission belt is also installed on the first guide wheel 17 and the second guide wheel 18. The second guide wheel 18 keeps the transmission belt tight by a spring. The glue metering device for the paper mounting machine also includes a glue injection device above the glue roller 4, a glue coating device above the anilox roller 3, a material receiving device diagonally above the glue coating device, and a glue collection device above the anilox roller 3 and the glue roller 4.

[0033] like Figure 2As shown, the glue metering device for the paper mounting machine includes a glue dispensing device, which includes a glue tank 11, a glue nozzle 14, and a collection trough 15. The glue tank 11 is placed on one side of the base 1, and a cover plate 12 is provided on the glue tank 11. A liquid pump 13 is provided on the cover plate 12, which can discharge the glue in the glue tank 11 through the outlet. A notch is provided on one side of the cover plate 12. A connecting plate is provided below the glue nozzle 14 and is fixed on the mounting base 2. Multiple glue outlets are provided in front of the glue nozzle 14, which are located between the anilox roller 3 and the glue roller 4. One side of the glue nozzle 14 is connected to the outlet of the liquid pump 13 through a hose. The collection trough 15 is fixed on the mounting base 2 and is located below the anilox roller 3 and the glue roller 4. One end of the collection trough 15 passes through the mounting base 2 to the top of the glue tank 11. The cross-section of the collection trough 15 is "V" shaped, and a through hole that fits the collection trough 15 is opened on the mounting base 2.

[0034] In a specific embodiment: during use, glue is added to the glue bucket 11, and the liquid pump 13 on the cover plate 12 is started by an external power source to discharge the glue in the glue bucket 11 through the glue nozzle 14. The discharged glue will be located between the glue roller 4 and the anilox roller 3. Then, the main power motor 16 is started to rotate by an external power source, and drives the anilox roller 3 to rotate through the transmission belt assembly, so that the glue adheres to the surface of the anilox roller 3. At the same time, the glue between the anilox roller 3 and the glue roller 4 will fall into the collection tank 15 through the narrow gap between the anilox roller 3 and the glue roller 4, and then flow back into the glue bucket 11.

[0035] like Figure 2 , Figure 5 and Figure 8 As shown, the glue metering device for the paper mounting machine includes a glue application device, which includes a placement plate 19, a support plate 20, a mounting plate 21, and a first feeding belt assembly 22. The placement plate 19 is fixed on the mounting base 2 and located above the anilox roller 3. The support plate 20 is fixed on the mounting base 2 and located below the anilox roller 3. The support plate 20 is vertically fixed and horizontally evenly distributed, which can fully support the glued paper and reduce contact with the paper. The upper surfaces of the placement plate 19 and the support plate 20 are on the same plane, which is tangent to the cross-sectional circle of the anilox roller 3. The angle between this plane and the working plane is 35°-50°. The mounting plate 21 is fixed to the inner side of the upper end of the base 1. The first feeding belt assembly 22 is mounted on the mounting plate 21 and located above the placement plate 19, the anilox roller 3, and the support plate 20. A motor is fixed on the mounting plate 21, and the motor output shaft is poweredly connected to the first feeding belt assembly 22 through a transmission belt.

[0036] In a specific embodiment: during use, the placement plate 19 lifts the paper and moves it downwards via the first feeding belt group 22, so that the paper comes into contact with the anilox roller 3, thereby adhering the glue on the anilox roller 3 to the paper. At the same time, the first feeding belt group 22 continues to push the paper downwards to above the support plate 20, thereby completing the glue application step.

[0037] During adjustment, the height of the mounting base 2 is controlled by the electric lifting guide rail on the base 1, thereby adjusting the distance between the first feeding belt group 22 and the anilox roller 3 to accommodate paper of different thicknesses.

[0038] like Figure 3 , Figure 8 and Figure 9 As shown, the glue metering device for the paper mounting machine includes a receiving device, which includes a limiting plate 23, a second feeding belt assembly 24, and a guide plate 25. The limiting plate 23 is fixed on the mounting plate 21 and located above the placement plate 19. The second feeding belt assembly 24 is located on the limiting plate 23 and is poweredly connected to the output shaft of the motor on the mounting plate 21 via a transmission belt. The guide plate 25 is rotatably mounted on the limiting plate 23. The upper end of the limiting plate 23 is raised, and the guide plate 25 is designed to be curved. The hinge point between the guide plate 25 and the limiting plate 23 is located at 1 / 3-1 / 4 of the upper end of the guide plate 25, so that the center of gravity of the guide plate 25 is located below the hinge point, and the lower end of the guide plate 25 contacts the placement plate 19 due to gravity.

[0039] In a specific embodiment: When in use, the external feeding device will feed the paper onto the placement plate 19. Since the paper is in a high-speed moving state, it will come into contact with the guide plate 25. Due to the curved design of the guide plate 25, the paper moves downward and falls between the limiting plate 23 and the placement plate 19. Then, the lower end of the guide plate 25 contacts the paper, so that the paper adheres to the placement plate 19. Then, under the push of the second feeding belt group 24, the paper continues to move downward, thereby completing the receiving.

[0040] like Figure 2 , Figure 5 , Figure 6 and Figure 7 As shown, the glue metering device for the paper mounting machine includes a glue collection device, which includes a slide bar 5, a worm gear 6, and a stop block 7. The slide bar 5 is fixed on the mounting base 2, and the worm gear 6 is rotatably mounted on the mounting base 2. The mounting base 2 is equipped with a motor, and the output shaft of the motor is poweredly connected to the worm gear 6. The stop block 7 is mounted on the worm gear 6 and slidably mounted on the slide bar 5. The bottom of the stop block 7 has two arc-shaped notches, which respectively fit with the anilox roller 3 and the glue roller 4. The stop block 7 has a glue suction hole 10, which is funnel-shaped with a larger front and a smaller back. The rear end of the glue suction hole 10 is connected to the inlet of the liquid pump 13 through a hose. The front of the stop block 7 is a slope to avoid the first feeding belt group 22. A slider 8 is slidably mounted on the slope. The upper end of the slider 8 is equipped with a spring connecting to the stop block 7, and the lower end of the slider 8 is fixed with a scraper 9.

[0041] In a specific embodiment: depending on the size of the paper, the motor is controlled to rotate by an external power supply, which causes the worm gear 6 to rotate and drive the stop 7 to move, thereby limiting the width of the glue between the glue roller 4 and the anilox roller 3. At the same time, during the movement of the stop 7, the liquid pump 13 generates suction at the glue suction hole 10 through the hose, sucking away the excess glue during the movement of the stop 7. Meanwhile, the rotation of the anilox tube will contact and rub against the scraper 9, thereby scraping off the glue that has overflowed, avoiding too much glue on the edges of the paper during the glue application process, preventing glue overflow during the mounting process, and thus achieving quantitative glue application.

[0042] Working Principle: During use, glue is added to the glue tank 11. The liquid pump 13 on the cover plate 12 is started via an external power source, discharging the glue from the glue tank 11 through the glue nozzle 14. The discharged glue settles between the glue roller 4 and the anilox roller 3. Then, the main power motor 16, powered by an external power source, rotates, driving the anilox roller 3 via a transmission belt assembly. This causes the glue to adhere to the surface of the anilox roller 3. Simultaneously, the glue between the anilox roller 3 and the glue roller 4 falls through the narrow gap between them into the collection trough 15, then flows back into the glue tank 11. Depending on the size of the paper, the motor is controlled by an external power source to rotate, causing the worm gear 6 to rotate and move the stop block 7, thus limiting the width of the glue between the glue roller 4 and the anilox roller 3. Simultaneously, as the stop block 7 moves, the liquid pump 13 generates suction at the glue suction hole 10 through a hose, sucking away excess glue during the movement of the stop block 7. The rotation of the anilox roller 3 causes friction with the scraper 9, scraping away any excess glue and preventing excessive glue from getting on the paper edges during the gluing process. An external feeding device then delivers the paper to the placement plate 19. Because the paper is moving at high speed, it contacts the guide plate 25. Due to the curved design of the guide plate 25, the paper moves downwards, landing between the limiting plate 23 and the placement plate 19. The lower end of the guide plate 25 then contacts the paper, causing it to adhere to the placement plate 19. The paper continues to move downwards under the push of the second feeding belt group 24. The placement plate 19 then lifts the paper, and the first feeding belt group 22 moves it downwards, bringing it into contact with the anilox roller 3. This allows the glue on the anilox roller 3 to adhere to the paper. Simultaneously, the first feeding belt group 22 continues to push the paper downwards above the support plate 20, completing the gluing process.

Claims

1. A paper mounting machine glue metering device, comprising a base (1), a screen roller (3) and a glue roller (4), the base (1) is provided on the working plane, the rear of the base (1) is provided with a connecting end, characterized in that: the base (1) is provided with a mounting seat (2) through the electric lifting guide rail, the mounting seat (2) is rotatably provided with the screen roller (3), the glue roller (4) is mounted on the mounting seat (2), a narrow gap of 1-5mm is left between the screen roller (3) and the glue roller (4), the screen roller (3) is provided with uniformly distributed and staggered shallow grooves, the base (1) is provided with a driving motor (16), the side of the base (1) is provided with a first guide wheel (17), a second guide wheel (18) is slidingly mounted on the side of the base (1) and is provided with a spring connecting the second guide wheel (18) and the base (1), one end of the screen roller (3) is power connected with the driving motor (16) through a transmission belt, the transmission belt is also mounted on the first guide wheel (17) and the second guide wheel (18), the second guide wheel (18) keeps the transmission belt tight through the spring; further comprising a glue injection device provided above the glue roller (4), a glue coating device provided above the screen roller (3), a material receiving device provided obliquely above the glue coating device, and a glue collecting device provided above the screen roller (3) and the glue roller (4); the glue coating device comprises a placing plate (19), a supporting plate (20), a mounting plate (21) and a first feeding belt group (22), the placing plate (19) is fixed on the mounting seat (2) and located above the screen roller (3), the supporting plate (20) is fixed on the mounting seat (2) and located below the screen roller (3), the mounting plate (21) is fixed on the inner side of the upper end of the base (1), the first feeding belt group (22) is mounted on the mounting plate (21) and located above the placing plate (19), the screen roller (3) and the supporting plate (20), a motor is fixed on the mounting plate (21), and the output shaft of the motor is power connected with the first feeding belt group (22) through a transmission belt; the supporting plate (20) is vertically fixed and horizontally arranged uniformly; the upper surfaces of the placing plate (19) and the supporting plate (20) are in the same plane, the plane is tangent to the cross-sectional circle of the screen roller (3), and the angle between the plane and the working plane is 35°-50°; the glue collecting device comprises a sliding rod (5), a worm (6) and a stop block (7), the sliding rod (5) is fixed on the mounting seat (2), the worm (6) is rotatably mounted on the mounting seat (2), a motor is provided on the mounting seat (2), the output shaft of the motor is power connected with the worm (6), and the stop block (7) is mounted on the worm (6) and slidingly mounted on the sliding rod (5); two arc-shaped notches are provided below the stop block (7) and respectively engage with the screen roller (3) and the glue roller (4), a glue suction hole (10) is provided on the stop block (7), the front of the stop block (7) is an inclined surface, a sliding block (8) is slidingly mounted on the inclined surface, a spring is provided on the upper end of the sliding block (8) and connected with the stop block (7), and a scraper (9) is fixed on the lower end of the sliding block (8); the glue suction hole (10) is funnel-shaped with a large front and a small back, and the rear end of the glue suction hole (10) is connected with the input port of a liquid pump (13) through a hose.

2. A glue metering device for a paper mounting machine as claimed in claim 1, characterized in that The glue injection device comprises a glue barrel (11), a glue nozzle (14) and a collecting groove (15), the glue barrel (11) is placed on one side of the base (1), the glue barrel (11) is provided with a cover plate (12), the cover plate (12) is provided with a liquid pump (13), the liquid pump (13) can discharge glue in the glue barrel (11) through an outlet, one side of the cover plate (12) is provided with a notch, the glue nozzle (14) is provided below a connecting plate, the connecting plate is fixed on the mounting seat (2), the glue nozzle (14) is provided in front of a plurality of glue outlets, the glue outlets are located between the anilox roller (3) and the glue roller (4), one side of the glue nozzle (14) is connected with the outlet of the liquid pump (13) through a hose, the collecting groove (15) is fixed on the mounting seat (2), the collecting groove (15) is located below the anilox roller (3) and the glue roller (4), one end of the collecting groove (15) penetrates through the mounting seat (2) to above the glue barrel (11), the cross section of the collecting groove (15) is "V" shaped, and the mounting seat (2) is provided with a through hole matched with the collecting groove (15).

3. The glue metering device for a paper mounting machine according to claim 1, wherein The material receiving device comprises a limiting plate (23), a second feeding belt group (24) and a guide plate (25), the limiting plate (23) is fixed on the mounting plate (21) and located above the placing plate (19), the second feeding belt group (24) is arranged on the limiting plate (23) and is power-connected with the output shaft of the motor on the mounting plate (21) through a transmission belt, and the guide plate (25) is rotatably arranged on the limiting plate (23).

4. A glue metering device for a paper mounting machine as claimed in claim 3, characterized in that The upper end of the limiting plate (23) is raised, the guide plate (25) is designed to be curved, and the hinge point of the guide plate (25) and the limiting plate (23) is located at 1 / 3-1 / 4 of the upper end of the guide plate (25).

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