A dust removal paper feeding device of a corrugated paperboard printing machine

Abstract

The present application relates to paperboard printing equipment technical field, especially relates to a corrugated paperboard printing machine dust removal paper feeding device, including frame, paper feeding platform set on the frame, and paper feeding air box set on one side of the paper feeding platform, the frame is located on the side of the paper feeding platform paper feeding and is provided with paper pressing positioning mechanism, the paper pressing positioning mechanism is movably connected to the frame, the rear side of the paper pressing positioning mechanism is also provided with dust removal mechanism, the both ends of the dust removal mechanism and the frame are connected with the adjusting mechanism for adjusting the gap between the paper pressing positioning mechanism and the paperboard, and the dust removal mechanism and the adjusting mechanism are drivingly connected, the present application controls the synchronous lifting movement of the paper pressing positioning mechanism and the dust removal mechanism according to the corrugated paperboard of different thickness through the adjusting mechanism, so that the gap of the paperboard at the paper blocking and dust removal station is just in the slight pressure state, then the surface of the corrugated paperboard can be accurately dusted without affecting the transmission process, the production cost is effectively saved, and the printing quality of the paperboard is improved.

Description

A dust removal and paper feeding device for a corrugated cardboard printing machine Technical Field

[0001] This invention relates to the field of paperboard printing equipment technology, and in particular to a dust removal and paper feeding device for a corrugated paperboard printing machine. Background Technology

[0002] During the paper feeding process of the corrugated cardboard water-based printing machine, the cardboard is adsorbed onto the surface of each air box by the negative pressure of the air box. Under the action of the paper feeding rollers that rotate synchronously in the paper feeding air box, the bottom sheet is drawn from under the cardboard stack by the paper feeding air box and passed to the paper delivery air box. Similarly, under the action of the paper delivery air box and the paper support rollers that rotate synchronously, the paper is pushed to the next process.

[0003] Currently, Chinese patent CN103708255B discloses a micro-pressure dust removal and paper feeding device for a corrugated cardboard water-based printing machine. The device includes a frame, a bellows mounted on the frame, multiple paper feeding rollers and multiple paper support rollers mounted within the bellows, a support frame mounted on the frame and above the bellows, a paper feeding bellows, and a paper delivery bellows adjacent to the paper feeding bellows. A gluing roller is supported by the support frame and suspended at the tail end of the paper delivery bellows. The gluing roller has an elastic adhesive surface. A paper support roller is positioned in the paper bellows corresponding to the position of the gluing roller. A negative pressure exhaust device adsorbs the cardboard onto the upper surfaces of the paper feeding bellows and the paper delivery bellows. This technical solution applies only slight pressure to the cardboard during the paper feeding process, avoiding the phenomenon of the cardboard being crushed by the strong pressure between the conveying traction roller and the lower traction roller during the paper feeding process. However, because this solution requires manual adjustment of the height of the front guide plate to adapt to different thicknesses of corrugated cardboard, and the gap between the adhesive roller and the paper support roller in the dust removal device is controlled by an adjustment mechanism, it can be seen that the front guide plate and the dust removal device use different methods to control the gap adjustment of cardboard of different thicknesses, and the control methods of the two are not related and are set independently. This not only requires the use of two sets of control devices, increasing production costs, but also makes it impossible to ensure that the transmission between the two is synchronized, thus affecting the subsequent printing effect of the corrugated cardboard. Summary of the Invention

[0004] In order to address the technical deficiencies mentioned in the background art, the present invention aims to provide a dust removal and paper feeding device for a corrugated cardboard printing machine. This device solves the problem that the gap between the cardboard and the printing plate cannot be synchronously controlled and adjusted during the positioning and dust removal of the existing cardboard, resulting in high production costs. By adopting a set of control methods to achieve synchronous linkage control of gap adjustment, the present invention effectively saves production costs and improves the printing quality of the cardboard.

[0005] To achieve the above objectives, the present invention adopts the following technical solution:

[0006] A dust removal and paper feeding device for a corrugated cardboard printing machine includes a frame, a paper feeding platform mounted on the frame, and a paper feeding air box mounted on one side of the paper feeding platform. A paper pressing and positioning mechanism is located on the side of the frame where the paper feed platform enters. A dust removal mechanism is located behind the paper pressing and positioning mechanism. The dust removal mechanism is connected to the frame at both ends by an adjustment mechanism for adjusting the gap between the paper pressing and positioning mechanism and the cardboard. The dust removal mechanism and the adjustment mechanism are kinetically connected. The adjustment mechanism includes a crossbeam, support frames fixed to both ends of the crossbeam, and a screw drive assembly for adjusting the lifting and lowering of the support frames. A mounting plate is located on one side of the crossbeam, and bidirectional slide rails are parallelly distributed on the mounting plate. The bidirectional slide rails are slidably connected to the paper pressing and positioning mechanism. A lifting guide rail is provided between the support frame and the frame. The lifting guide rail is axially fixed to the inner wall of the frame and slidably connected to the support frame via guide blocks. The screw drive assembly is linked to the lifting guide rail to drive the dust removal mechanism and the paper pressing and positioning mechanism to lift and lower synchronously.

[0007] Preferably, the dust removal mechanism includes a brush roller, a dust collection box located above the brush roller, and a first drive motor for driving the brush roller to rotate. The dust collection box has an L-shaped structure, and a dust collection port is provided on the bottom side of the dust collection box facing the paper feeding air box. The first drive motor is fixedly installed on the support frame, and the output shaft end of the first drive motor is rotatably connected to the brush roller by a synchronous belt assembly.

[0008] Preferably, the synchronous belt assembly includes a driving synchronous pulley, a driven synchronous pulley, and a synchronous belt. The driving synchronous pulley is sleeved on the output shaft end of the first drive motor, and the driven synchronous pulley is sleeved on one end of the brush roller. The driven synchronous pulley and the driving synchronous pulley are connected by a synchronous belt.

[0009] Preferably, the lead screw drive assembly includes a fixed base, a nut seat mounted on the fixed base, a drive screw connected between the nut seats, and a second drive motor for driving the drive screw to rotate. The fixed base is respectively disposed on the support frame and the machine frame, and both ends of the fixed base are connected to the nut seats. One end of the drive screw is threadedly connected to the nut seat, and the other end is rotatably connected to the fixed base. The second drive motor is fixedly mounted on the fixed base, and the output shaft of the second drive motor is drively connected to the nut seat.

[0010] Preferably, the paper feeding platform has multiple paper feeding guide rollers that are equidistantly and parallelly distributed, and a paperboard pushing assembly for feeding individual sheets of a stack of paperboard is slidably connected above the paper feeding platform; the paperboard pushing assembly includes a crossbar arranged along the length of the paper feeding platform and a paper pushing rod movably connected to the crossbar. The two ends of the crossbar are connected to the two sides of the paper feeding platform through bearing seats, and the two ends of the paper pushing rod are hinged to the top of the crossbar through hinges.

[0011] Preferably, the paper feeding air box has a negative pressure chamber inside, and the upper end of the negative pressure chamber is provided with an openable cover plate. The cover plate has a plurality of evenly arranged rectangular air vents. Each air vent is provided with a paper feeding cam, and a paper feeding wheel shaft is connected in series between the plurality of paper feeding cams. The paper feeding wheel shafts are distributed in parallel in the negative pressure chamber, and a third servo motor is rotatably connected to both ends of the paper feeding wheel shafts.

[0012] Preferably, the paper feeding air box is also provided with a paper support roller, which is positioned directly below the brush roller, and a support roller is provided on one side of the paper support roller. The two ends of the paper support roller and the support roller are connected to a third servo motor through gear meshing.

[0013] Preferably, an adsorption fan is provided at the bottom of the paper feeding air box, and the adsorption fan is connected to the paper feeding air box through a pipe; support frames are provided at both ends of the paper feeding air box, and the support frames are fixedly connected to the two side walls of the frame.

[0014] Preferably, the paper pressing and positioning mechanism includes a paper baffle frame slidably connected to a bidirectional slide rail and a driving assembly for driving the paper baffle frame to slide horizontally along the crossbeam frame. The paper baffle frame consists of a left baffle, a left front baffle, a right front baffle, and a right baffle. The left front baffle and the right front baffle are symmetrically installed in the middle of the crossbeam frame. The left baffle is slidably connected to the bidirectional slide rail and is located to the left of the left front baffle. The left baffle and the left front baffle are connected by a left adjusting screw. The right baffle is slidably connected to the bidirectional slide rail and is located to the right of the right front baffle. The right baffle and the right front baffle are connected by a right adjusting screw.

[0015] Preferably, the drive assembly includes a left baffle adjusting motor, a right baffle adjusting motor, and a paper-tapping cylinder. The left baffle adjusting motor and the right baffle adjusting motor are respectively fixedly connected to the mounting plate, and the output shafts of the left baffle adjusting motor and the right baffle adjusting motor are respectively drivenly connected to the left adjusting screw and the right adjusting screw. The paper-tapping cylinder is respectively installed on the left baffle and the right baffle, and the paper-tapping cylinder is linked and cooperates with the left baffle adjusting motor and the right baffle adjusting motor.

[0016] In summary, the beneficial effects of the present invention are as follows:

[0017] The dust removal and paper feeding device of the corrugated cardboard printing machine of the present invention can synchronously control the paper pressing and positioning mechanism and the dust removal mechanism to move up and down in sync during the process of the cardboard being conveyed to the surface of the paper feeding air box by using an adjustment mechanism according to the different thicknesses of the corrugated cardboard. It can also adjust the gap of the paper stop and the distance between the dust removal mechanism and the cardboard according to the different thicknesses of the corrugated cardboard, so that the cardboard is in a slightly compressed state after the gap is adjusted. In this way, the dust on the surface of the corrugated cardboard can be accurately removed without affecting the conveying process. Synchronous linkage control can be achieved with a single control method, which effectively saves production costs and improves the printing quality of the cardboard. Attached Figure Description

[0018] Figure 1 is a schematic diagram of the dust removal and paper feeding device of the corrugated cardboard printing machine of the present invention;

[0019] Figure 2 is an exploded view of the dust removal and paper feeding device of the corrugated cardboard printing machine of the present invention;

[0020] Figure 3 is an exploded view of the pressing and positioning mechanism and the dust removal mechanism in this invention;

[0021] Figure 4 is a schematic diagram of the paper feeding bellows of the present invention;

[0022] Figure 5 is a front view of the dust removal and paper feeding device of the corrugated cardboard printing machine of the present invention;

[0023] Figure 6 is a cross-sectional view of surface AA in Figure 5.

[0024] 1. Frame; 11. Lifting guide rail; 2. Paper feeding platform; 21. Paper feeding guide roller; 22. Paperboard pushing assembly; 221. Crossbar; 222. Paper pushing rod; 3. Paper feeding air box; 31. Negative pressure chamber; 32. Cover plate; 321. Air outlet; 33. Paper feeding cam; 34. Third servo motor; 35. Paper support roller; 36. Support roller; 37. Adsorption fan; 38. Support frame; 39. Paper feeding wheel shaft; 4. Paper pressing and positioning mechanism; 41. Paperboard baffle frame; 411. Left side baffle; 412. Left front baffle; 413. Right front baffle; 414. Right side baffle; 42. Drive assembly; 421. Left baffle adjusting motor; 422. Right baffle adjusting motor; 423. Paper-tapping cylinder; 5. Dust removal mechanism; 51. Brush roller; 52. Dust collection box; 53. First drive motor; 6. Adjustment mechanism; 61. Crossbeam frame; 611. Mounting plate; 612. Bidirectional slide rail; 62. Support frame; 63. Screw drive assembly; 631. Fixed seat; 632. Nut seat; 633. Drive screw; 634. Second drive motor; 7. Synchronous belt assembly; 71. Driving synchronous pulley; 72. Driven synchronous pulley; 73. Synchronous belt. Detailed Implementation

[0025] 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. All other embodiments obtained by those skilled in the art based on the embodiments of the present invention are within the scope of protection of the present invention.

[0026] Those skilled in the art should understand that, in the disclosure of this invention, the terms "longitudinal," "lateral," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," and "outer," etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, the above terms should not be construed as limiting this invention.

[0027] Furthermore, the terms "installation," "setup," "equipped with," "connection," and "linked" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral structure; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium, or an internal connection between two devices, components, or parts. Those skilled in the art can understand the specific meaning of these terms in this invention based on the specific circumstances.

[0028] In the description of this invention, the use of terms such as "a number" means one or more, with "more than" meaning two or more. Terms like "greater than," "less than," and "exceeding" are understood to exclude the stated number, while terms like "above," "below," and "within" are understood to include the stated number. The use of terms like "first," "second," and "third" is merely for distinguishing technical features and should not be construed as indicating or implying relative importance, the number of indicated technical features, or the sequential relationship between indicated technical features.

[0029] The following describes in further detail an embodiment of a dust removal and paper feeding device for a corrugated cardboard printing machine according to the present invention, with reference to Figures 1-6.

[0030] A dust removal and paper feeding device for a corrugated cardboard printing machine, as shown in Figures 1 and 2, includes a frame 1, a paper feeding platform 2 mounted on the frame 1, and a paper feeding air box 3 mounted on one side of the paper feeding platform 2. A paper pressing and positioning mechanism 4 is mounted on the side of the frame 1 where the paper feeding platform 2 enters the paper. The paper pressing and positioning mechanism 4 is movably connected to the frame 1. A dust removal mechanism 5 is also mounted on the rear side of the paper pressing and positioning mechanism 4. Adjustment mechanisms 6 for adjusting the gap between the paper pressing and positioning mechanism 4 and the cardboard are connected between the two ends of the dust removal mechanism 5 and the frame 1, and the dust removal mechanism 5 and the adjustment mechanism 6 are drively connected. The adjustment mechanism 6 includes a crossbeam 61 and a fixed... The support frame 62 is located at both ends of the crossbeam 61, and the screw drive assembly 63 is used to adjust the lifting and lowering of the support frame 62. A mounting plate 611 is provided on one side of the crossbeam 61. Bidirectional slide rails 612 are distributed in parallel on the mounting plate 611. The bidirectional slide rails 612 are slidably connected to the paper pressing and positioning mechanism 4. A lifting guide rail 11 is provided between the support frame 62 and the frame 1. The lifting guide rail 11 is axially fixed to the inner side wall of the frame 1. The support frame 62 is slidably connected to the lifting guide rail 11 by setting guide blocks. The screw drive assembly 63 is driven by the lifting guide rail 11 to drive the dust removal mechanism 5 and the paper pressing and positioning mechanism 4 to lift and lower synchronously.

[0031] Specifically, during the paper feeding process of corrugated cardboard on the paper feeding platform 2, in order to position and transport cardboard of different sizes and thicknesses, a paper pressing and positioning mechanism 4 is set at the end of the paper feeding platform 2 for limiting. The gap of the paper pressing and positioning mechanism 4 can be adjusted by the adjusting mechanism 6, ensuring that the gap between the paper pressing and positioning mechanism 4 and the cardboard is maintained within an appropriate range. This ensures that the cardboard is under slight pressure, thereby improving the subsequent printing quality. Before printing, a dust removal mechanism 5 is needed to remove dust, paper scraps, and other impurities from the surface of the cardboard to improve the printing effect. During dust removal, since there is also a gap between the dust removal mechanism 5 and the cardboard... Due to the inherent limitations of existing dust removal mechanisms, such as the dust removal mechanism 5 being fixed to the frame 1 and requiring manual adjustment of the gap between it and the cardboard, the dust removal effect is poor for cardboard of different thicknesses, resulting in low production efficiency. To enable the dust removal mechanism 5 to adaptively adjust the gap for cardboard of different thicknesses, this invention achieves synchronous adjustment of the paper pressing and positioning mechanism 4 and the dust removal mechanism 5 using the same adjustment mechanism 6. This ensures that the gap between the paper pressing and positioning mechanism 4 and the dust removal mechanism 5 and the cardboard remains within an appropriate range, effectively improving the printing quality of the cardboard and significantly reducing production costs.

[0032] The dust removal mechanism 5 includes a brush roller 51, a dust collection box 52 located above the brush roller 51, and a first drive motor 53 for driving the brush roller 51 to rotate. The dust collection box 52 has an L-shaped structure, and a dust suction port is opened on the side of the dust collection box 52 facing the paper feeding air box 3. The dust collection box 52 is connected to an external negative pressure fan (not shown) through a pipe to suck up and process the brushed dust. The first drive motor 53 is fixedly installed on the support frame 62, and the output shaft end of the first drive motor 53 is rotatably connected to the brush roller 51 by a synchronous belt assembly 7. The synchronous belt assembly 7 includes a driving synchronous pulley 71, a driven synchronous pulley 72, and a synchronous belt 73. The driving synchronous pulley 71 is sleeved on the output shaft end of the first drive motor 53, and the driven synchronous pulley 72 is sleeved on one end of the brush roller 51. The driven synchronous pulley 72 and the driving synchronous pulley 71 are rotatably connected by a synchronous belt 73. The synchronous belt assembly 7 enables the brush roller 51 to maintain synchronous speed with the first drive motor 53, thereby allowing the rotation speed to be adjusted according to different types of cardboard. Meanwhile, since the first drive motor 53 is mounted on the support frame 62, and the support frame 62 is movably connected to the frame 1 via the lifting guide rail 11, the screw drive assembly 63 can automatically control the brush roller 51 to move up and down along the lifting guide rail 11, thereby adjusting the gap between the brush roller 51 and the cardboard according to the thickness of the cardboard and improving cleaning efficiency.

[0033] The lead screw drive assembly 63 includes a fixed base 631, a nut seat 632 mounted on the fixed base 631, a lead screw 633 connected between the nut seats 632, and a second drive motor 634 for driving the lead screw 633 to rotate. The fixed base 631 is respectively disposed on the support frame 62 and the frame 1, and both ends of the fixed base 631 are connected to the nut seat 632. One end of the lead screw 633 is threadedly connected to the nut seat 632, and the other end is rotatably connected to the fixed base 631. The second drive motor 634 is fixedly mounted on the fixed base 631, and the output shaft of the second drive motor 634 is drively connected to the nut seat 632. The lead screw drive assembly 63 is located on both sides of the frame 1, respectively fixed between the support frame 62 and the frame 1. The lead screw drive method has the advantages of fast response speed, high precision, and high efficiency.

[0034] In this embodiment, the paper feeding platform 2 has multiple paper feeding guide rollers 21 built in. The multiple paper feeding guide rollers 21 are equidistantly and parallelly distributed, and a paperboard pushing assembly 22 is slidably connected above the paper feeding platform 2. The paperboard pushing assembly 22 includes a crossbar 221 arranged along the length direction of the paper feeding platform 2 and a paper pushing rod 222 movably connected to the crossbar 221. The two ends of the crossbar 221 are slidably connected to the paper feeding platform 2 through bearing seats, and the two ends of the paper pushing rod 222 are hinged to the top of the crossbar 221 through hinges.

[0035] Specifically, the stacked cardboard is placed on the paper feeding platform 2, and the bottom sheet is extracted from the cardboard stack by the pusher rod 222 under the action of the cardboard pushing component 22. The bottom sheet is then transferred to the paper feeding box 3 by the synchronously rotating guide roller 21 within the paper feeding platform 2. The sheet is then adsorbed onto the surface of the paper feeding box 3 by negative pressure, thus completing the dust removal operation and being pushed to the next process. During the paper picking process, the cardboard pushing component 22 has bearing seats fixed on both sides laterally. A guide rod with a threaded surface is installed within the paper feeding platform 2, which engages with the bearing seats. The guide rod is driven by the engagement between the guide rod and the bearing seats, and is connected to a servo motor, allowing the cardboard pushing component 22 to move horizontally along the guide rod within the paper feeding platform 2. To extract the bottom sheet of the cardboard stack, the pusher rod 222 on the crossbar 221 is movably connected to the crossbar 221 using a hinge, thus adapting to changes in the cardboard stack height and ensuring that the bottom layer of cardboard is stably pushed to the paper feeding box 3, thereby achieving continuous paper feeding.

[0036] In this embodiment, the paper feeding air box 3 has a negative pressure chamber 31 inside. The upper end of the negative pressure chamber 31 is provided with an openable cover plate 32. The cover plate 32 has a plurality of evenly arranged rectangular air vents 321. Each air vent 321 is provided with a paper feeding cam 33. The paper feeding cams 33 are rotatably connected to each other by a paper feeding wheel shaft 39. The paper feeding wheel shafts 39 are distributed in parallel in the negative pressure chamber 31, and the two ends of the paper feeding wheel shafts 39 are rotatably connected to a third servo motor 34.

[0037] Specifically, the paper feeding air box 3 is equipped with at least three paper feeding rollers 39, each paper feeding roller 39 is equipped with multiple paper feeding cams 33, each paper feeding roller 39 is driven individually by a servo motor, and each paper feeding cam 33 rotates in the same direction and has the same linear speed. Each paper feeding cam 33 in the paper feeding air box 3 stops rotating after the previous paperboard leaves, and starts to operate synchronously again when the next paperboard lands on the surface of the paper feeding air box 3 and the previous paperboard has completed a corresponding cycle; and the paper support roller 35 and the support roller 36 in the paper feeding air box 3 both rotate synchronously.

[0038] During the paperboard's movement on the surface of the paper feeding bellows 3, a paper support roller 35 is also provided inside the paper feeding bellows 3. The paper support roller 35 is positioned directly below the brush roller 51, and a support roller 36 is located on one side of the paper support roller 35. The two ends of the paper support roller 35 and the support roller 36 are connected to the third servo motor 34 through gear meshing. When the paperboard passes between the brush roller 51 and the paper support roller 35, due to the appropriate gap between the paper support roller 35 and the brush roller 51, and the pressure exerted by the paper support roller 35 on the paperboard and the brush roller 51, the brush roller 51 applies only slight pressure to the end surface of the paperboard. The brush roller 51 not only plays a certain auxiliary dragging role on the paperboard on the paper feeding bellows 3, but also removes dust, paper scraps, and sand particles from the surface of the paperboard and collects them using the dust collection box 52, thereby removing dust, paper scraps, and sand particles from the surface of the paperboard. The paper support roller 35 and the support roller 36 not only greatly improve the longitudinal positioning of the paperboard during the paperboard conveying process, but also improve the stability and reliability of the aforementioned paper feeding cycle. Moreover, during this process, the cardboard does not need to bear positive pressure; only the lower surface of the cardboard is adsorbed, which better protects the cardboard and does not damage its structural strength.

[0039] In this embodiment, an adsorption fan 37 is provided at the bottom of the paper feeding air box 3, and the adsorption fan 37 is connected to the paper feeding air box 3 through a pipe; support frames 38 are provided at both ends of the paper feeding air box 3, and the support frames 38 are fixedly connected to the two side walls of the frame 1.

[0040] Specifically, the negative pressure chamber 31 of the paper feeding air box 3 generates negative pressure through the suction fan 37 at the bottom, and the rectangular air vents 321 on the cover plate 32 cause the cardboard to be adsorbed onto the surface. The paper feeding cam 33 is driven to rotate by the third servo motor 34 through the paper feeding wheel shaft 39, and the cam periodically lifts the edge of the cardboard to achieve delivery. The paper support roller 35 and the support roller 36 are linked by a gear set and driven by the same third servo motor 34 to ensure that the cardboard is smoothly transferred to the next process.

[0041] In this embodiment, the paper pressing and positioning mechanism 4 includes a paper baffle frame 41 slidably connected to the bidirectional slide rail 612 and a driving assembly 42 for driving the paper baffle frame 41 to slide horizontally along the crossbeam frame 61. The paper baffle frame 41 is composed of a left baffle 411, a left front baffle 412, a right front baffle 413, and a right baffle 414. The left front baffle 412 and the right front baffle 413 are symmetrically installed in the middle of the crossbeam frame 61. The left baffle 411 is slidably connected to the bidirectional slide rail 612 and is located to the left of the left front baffle 412. The left baffle 411 and the left front baffle 412 are connected by a left adjusting screw. The right baffle 414 is slidably connected to the bidirectional slide rail 612 and is located to the right of the right front baffle 413. The right baffle 414 and the right front baffle 413 are connected by a right adjusting screw.

[0042] Specifically, when the cardboard is conveyed to the front edge feeding air box 3, the cardboard limiting mechanism will adjust and limit the cardboard according to its size. First, according to the length of the cardboard, the left and right side plate stops are driven to slide along the bidirectional slide rail 612 on the crossbeam frame 61, so that they can be clamped on the left and right sides of the cardboard. At the same time, the left and right side plate stops are used to limit the front position of the cardboard, so that it can be limited according to the cardboard of different widths, thereby adapting to cardboard of different sizes and improving its applicability. The drive assembly 42, which moves the baffle plate frame 41, includes a left baffle adjusting motor 421, a right baffle adjusting motor 422, and a paper-tapping cylinder 423. The left and right baffle adjusting motors 421 and 422 are fixedly connected to the mounting plate 611, and their output shafts are respectively connected to the left and right adjusting screws. The paper-tapping cylinder 423 is mounted on the left baffle 411 and right baffle 414, and is connected to the left and right adjusting motors 421 and 422, respectively. The plate adjustment motor 422 works in conjunction with the left and right baffle adjustment motors 421 and 422 to independently drive the left baffle 411, left front baffle 412, right front baffle 413 and right baffle 414 on the crossbeam frame 61 to adapt to the paper blocking requirements when printing with different paper widths. The paper-tapping cylinder 423 is used to flatten the edge of the corrugated paper feed and prevent the edge of the corrugated paper from curling up during the paper feeding process (when the traditional upper and lower combined rollers feed paper forward, the tail of the corrugated paper will curl up, which will affect the subsequent printing quality), thereby improving the paper feeding quality.

[0043] The working principle of the dust removal and paper feeding device of the corrugated cardboard printing machine of the present invention:

[0044] When the cardboard to be printed or slotted is neatly stacked on the paper feeding table, the cardboard at the bottom layer is pushed onto the paper feeding guide roller 21 by the cardboard pushing component 22 and begins to be conveyed to the paper feeding air box 3. This allows the cardboard to be smoothly transitioned through the paper pressing and positioning mechanism 4. Simultaneously, the paper feeding air box 3 generates suction force, causing the cardboard to adhere smoothly to the surface of the air box 3, ensuring that the cardboard remains flat throughout the feeding process. Finally, the brush roller 51 of the dust removal mechanism 5 removes dust from the cardboard surface before conveying it to the next process. However, depending on the cardboard thickness... First, the distance between the paper pressing and positioning mechanism 4 and the cardboard, and between the brush roller 51 and the paper support roller 35, is maintained appropriately by adjusting the mechanism 6. First, the second drive motor 634 is started, and the transmission screw 633 drives the support frame 62 to rise and fall along the lifting guide rail 11. At this time, the height of the paper pressing and positioning mechanism 4 is adjusted synchronously by the mounting plate 611 to ensure that the paper blocking gap matches the thickness of the cardboard. At the same time, the brush roller 51 rises or falls with the support frame 62 to keep its contact pressure with the surface of the cardboard consistent. Finally, by repeating the above steps, the entire process of dust removal and paper feeding can be completed by continuous paper feeding.

[0045] In summary, the dust removal and paper feeding device of the corrugated cardboard printing machine of the present invention can synchronously control the paper pressing and positioning mechanism 4 and the dust removal mechanism 5 to move up and down in sync during the process of the cardboard being conveyed to the surface of the paper feeding air box 3 by using the adjusting mechanism 6 to control the paper pressing and positioning mechanism 4 and the dust removal mechanism 5 to move up and down in sync according to the different thicknesses of the corrugated cardboard. It can also adjust the gap of the paper stop and the distance between the dust removal mechanism 5 and the cardboard according to the different thicknesses of the corrugated cardboard, so that the cardboard is in a slightly compressed state after the gap is adjusted. In this way, the dust on the surface of the corrugated cardboard can be accurately removed without affecting the conveying process. Synchronous linkage control can be achieved with a single control method, which effectively saves production costs and improves the printing quality of the cardboard.

[0046] The embodiments described in this specific implementation are preferred embodiments of this application and are not intended to limit the scope of protection of this application. Identical components are represented by the same reference numerals. Therefore, all equivalent changes made to the structure, shape, and principle of this application should be covered within the scope of protection of this application.

Claims

1. A dust removal and paper feeding device for a corrugated cardboard printing machine, comprising a frame, a paper feeding platform mounted on the frame, and a paper feeding air box mounted on one side of the paper feeding platform; characterized in that, The frame is equipped with a paper pressing and positioning mechanism on the side where the paper feed platform enters. A dust removal mechanism is located behind the paper pressing and positioning mechanism. Both ends of the dust removal mechanism are connected to the frame by adjustment mechanisms for adjusting the gap between the paper pressing and positioning mechanism and the paperboard. The dust removal mechanism and the adjustment mechanisms are drively connected. The dust removal mechanism includes a brush roller, a dust collection box located above the brush roller, and a first drive motor for driving the brush roller to rotate. The dust collection box has an L-shaped structure, and a dust suction port is opened on the bottom side of the dust collection box directly opposite the paper feed air box. The first drive motor is fixedly mounted on the support frame, and the output shaft of the first drive motor is rotatably connected to the brush roller via a synchronous belt assembly. The synchronous belt assembly includes a driving synchronous pulley, a driven synchronous pulley, and a synchronous belt. The driving synchronous pulley is sleeved on the output shaft of the first drive motor, and the driven synchronous pulley is sleeved on one end of the brush roller. The driven synchronous pulley and the driving synchronous pulley are connected by a synchronous belt. The adjustment mechanism includes a crossbeam frame, support frames fixed to both ends of the crossbeam frame, and a screw drive assembly for adjusting the lifting of the support frame. A mounting plate is provided on one side of the crossbeam frame, and bidirectional slide rails are distributed parallel to each other on the mounting plate. The bidirectional slide rails are slidably connected to the paper pressing and positioning mechanism. A lifting guide rail is provided between the support frame and the machine frame. The lifting guide rail is axially fixed to the inner wall of the machine frame, and a guide block is provided on the lifting guide rail for slidable connection with the support frame. The screw drive assembly is linked to the lifting guide rail to drive the dust removal mechanism and the paper pressing and positioning mechanism to lift synchronously. The paper feeding air box has a negative pressure chamber inside, and the upper end of the negative pressure chamber is provided with a... The cover plate has several evenly arranged rectangular air vents. Each air vent is equipped with a paper feeding cam, and multiple paper feeding cams are connected in series with paper feeding wheel shafts. The paper feeding wheel shafts are distributed parallel to each other in the negative pressure chamber, and the two ends of the paper feeding wheel shafts are rotatably connected to a third servo motor. The paper feeding air box is also equipped with a paper support roller, which is positioned directly below the brush roller. A support roller is positioned on one side of the paper support roller, and the two ends of the paper support roller and the support roller are linked to the third servo motor through gear meshing.

2. The dust removal and paper feeding device for a corrugated cardboard printing machine according to claim 1, characterized in that, The lead screw drive assembly includes a fixed base, a nut seat mounted on the fixed base, a drive screw connected between the nut seats, and a second drive motor for driving the drive screw to rotate. The fixed base is respectively set on the support frame and the machine frame, and both ends of the fixed base are connected to the nut seats. One end of the drive screw is threaded to the nut seat, and the other end is rotatably connected to the fixed base. The second drive motor is fixedly mounted on the fixed base, and the output shaft of the second drive motor is drivenly connected to the nut seat.

3. The dust removal and paper feeding device for a corrugated cardboard printing machine according to claim 1, characterized in that, The paper feeding platform has multiple paper feeding guide rollers that are equidistantly and parallelly distributed. Above the paper feeding platform, a paperboard pushing assembly is slidably connected to push individual sheets of a stack of paperboard. The paperboard pushing assembly includes a crossbar arranged along the length of the paper feeding platform and a paper pushing rod movably connected to the crossbar. The two ends of the crossbar are connected to the two sides of the paper feeding platform through bearing seats, and the two ends of the paper pushing rod are hinged to the top of the crossbar through hinges.

4. The dust removal and paper feeding device for a corrugated cardboard printing machine according to claim 1, characterized in that, An adsorption fan is installed at the bottom of the paper feeding air box, and the adsorption fan is connected to the paper feeding air box through a pipe; support frames are installed at both ends of the paper feeding air box, and the support frames are fixedly connected to the two side walls of the frame.

5. The dust removal and paper feeding device for a corrugated cardboard printing machine according to claim 1, characterized in that, The paper-pressing and positioning mechanism includes a paper baffle frame slidably connected to a bidirectional slide rail and a driving assembly for driving the paper baffle frame to slide horizontally along the crossbeam frame. The paper baffle frame consists of a left baffle, a left front baffle, a right front baffle, and a right baffle. The left front baffle and the right front baffle are symmetrically installed in the middle of the crossbeam frame. The left baffle is slidably connected to the bidirectional slide rail and is located to the left of the left front baffle. The left baffle and the left front baffle are connected by a left adjusting screw. The right baffle is slidably connected to the bidirectional slide rail and is located to the right of the right front baffle. The right baffle and the right front baffle are connected by a right adjusting screw.

6. The dust removal and paper feeding device for a corrugated cardboard printing machine according to claim 5, characterized in that, The drive assembly includes a left baffle adjusting motor, a right baffle adjusting motor, and a paper-tapping cylinder. The left and right baffle adjusting motors are fixedly connected to the mounting plate, and their output shafts are respectively connected to the left and right adjusting screws. The paper-tapping cylinder is installed on the left and right baffles, and is linked to the left and right baffle adjusting motors.

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