A dust removal device for cardboard in a packaging box printing machine

Abstract

This utility model relates to the field of packaging box production technology and discloses a dust removal device for cardboard in a packaging box printing machine, comprising: a cardboard conveyor for conveying cardboard to be dusted; and a dust removal box disposed on one side of the cardboard conveyor, wherein the dust removal box is fitted with an openable and closable door via a hinge, and the door is provided with an exhaust port. This utility model features a linkage adjustment structure between the adsorption pipe and the motor-threaded shaft-threaded slider: starting the motor drives the threaded shaft to rotate, causing the threaded slider to slide along the slide rail, thereby making the adsorption pipe move synchronously with the cardboard conveyor; the suction nozzles evenly distributed on the outer wall of the adsorption pipe are inclined towards the cardboard conveying direction, forming a "dynamic covering airflow," which can not only remove impurities in the central area of ​​the cardboard but also cover the edges and corners (covering an area of ​​100%). Simultaneously, the flexible pipe adopts a retractable corrugated pipe structure, which can adaptively expand and contract with the movement of the adsorption pipe, avoiding damage from pipe pulling.

Description

Technical Field

[0001] The utility model relates to the technical field of packaging box production, and specifically relates to a cardboard dust removal device for a packaging box printing machine. Background Art

[0002] In the field of packaging box production and processing, the dust removal process before cardboard printing is a key precondition determining printing quality. During storage and handling of packaging box cardboard (such as corrugated cardboard, white cardboard), the surface is prone to adhering impurities such as dust, fluff, and paper scraps. If directly entering the printing process, these impurities will cause problems such as "uneven ink adhesion", "missing printing of patterns", and "registration deviation". In the mild case, manual rework and correction are required (each rework takes 10 - 15 minutes per sheet), and in the severe case, the cardboard is scrapped (scrap rate is about 8% - 12%), greatly increasing production costs. However, the existing dust removal devices supporting packaging box printing machines have many technical limitations and are difficult to meet the production requirements of "efficient dust removal, adaptability to multiple specifications, and easy maintenance". The specific problems are as follows:

[0003] On the one hand, the dust removal efficiency is low and the impurity residue rate is high. Traditional dust removal devices mostly adopt the design of "single suction nozzle + fixed position". The suction nozzle can only cover the central area of the cardboard (about 80% of the area), and it is difficult to remove impurities at the edges and corners (residue rate reaches 15% - 20%); moreover, the distance between the suction nozzle and the cardboard is fixed (usually 5 - 8 mm). For cardboard of different thicknesses (such as 1 mm thin cardboard, 5 mm thick corrugated cardboard), problems such as "insufficient suction due to too large distance" or "scraping the cardboard due to too small distance" are likely to occur. At the same time, the filtering structure of traditional devices is mostly "single - layer filter screen", which can only filter impurities with a particle size > 10 μm. Fine fluff (particle size 2 - 5 μm) is easy to penetrate through the filter screen and enter the suction pump, resulting in pump blockage (blockage frequency is about once every 4 hours), and it is necessary to stop the machine for disassembly and cleaning. Each cleaning takes 20 - 30 minutes, and the daily effective production time is less than 6 hours.

[0004] On the other hand, the adaptability is poor and the maintenance operation is cumbersome. The adsorption component of traditional dust removal devices is a fixed structure and can only be adapted to cardboard of a single width (such as a 400 mm standard width). If it is necessary to print packaging boxes of different specifications (such as 200 mm narrow - width cosmetic boxes, 600 mm wide - width logistics boxes), it is necessary to disassemble and replace the adsorption pipeline, and the operation is cumbersome and the calibration time is long (each replacement and calibration takes 25 - 30 minutes). In addition, the filtering component is mostly of an "integrated design". When replacing the filter screen, it is necessary to disassemble the dust removal box as a whole, which is likely to cause secondary dust leakage (leakage rate is about 10%), polluting the workshop environment; moreover, after replacing the filter screen, it is necessary to re - adjust the suction pressure, further increasing the maintenance cost and labor intensity.

[0005] These shortcomings result in significant deficiencies in the synergy of existing dust removal devices in terms of "high-efficiency dust removal," "multi-specification adaptation," and "convenient maintenance." This is especially true in scenarios involving the mass production of packaging boxes of different specifications (such as switching between 3-5 specifications per day), where equipment bottlenecks become even more pronounced, making it difficult to meet the demands of modern packaging box printing for "high capacity, high precision, and low loss." Therefore, there is an urgent need for a packaging box printing machine cardboard dust removal device that combines "full-width dust removal, adaptive adjustment, and easy maintenance." Utility Model Content

[0006] The purpose of this utility model is to provide a dust removal device for cardboard in a packaging box printing machine, which solves the above-mentioned technical problems.

[0007] To achieve the above objectives, this utility model provides the following technical solution: a dust removal device for cardboard in a packaging box printing machine, comprising:

[0008] Cardboard conveyor rack, used to transport cardboard to be dusted;

[0009] A dust collector is located on one side of the cardboard conveyor frame. The dust collector is equipped with an openable and closable door via a hinge, and the door is provided with an exhaust port.

[0010] A dust pump is built into the dust collection box, and its input end is connected to a dust inlet pipe;

[0011] A filter mechanism, installed on top of the dust collection box, includes:

[0012] A filter housing with a filter nozzle located in the middle, the filter nozzle being connected to the end of a connecting pipe;

[0013] The filter box is detachably embedded inside the filter housing, and has a flow channel core chamber inside, and a filter plate is installed at the bottom.

[0014] The filter plate cover is threaded to the bottom of the filter housing, and the bottom of the filter plate cover is connected to the dust inlet pipe;

[0015] The connecting pipe has two branch ports at its other end, each of which is connected to a flexible pipe.

[0016] An adsorption conduit is connected between the other ends of the two flexible conduits;

[0017] Multiple suction nozzles are connected at equal intervals on the outer side of the adsorption pipe.

[0018] Preferably, a sealing strip is provided between the door and the body of the dust collector, and a dustproof net is provided at the exhaust port.

[0019] Preferably, the filter plate has a double-layer structure, with a pre-filter on the upper layer and a HEPA high-efficiency filter on the lower layer, and a rubber sealing ring is provided on the edge of the filter plate.

[0020] Preferably, regulating valves are provided at the two branch ports of the connecting pipe, and the flexible pipe is a retractable corrugated pipe structure.

[0021] Preferably, the adsorption pipe has a long strip structure and is equipped with an adsorption filter element inside, and the opening direction of the dust suction nozzle is inclined towards the paperboard conveying direction.

[0022] Preferably, a connecting block is installed at the bottom of the adsorption pipe, and a threaded slider is fixedly connected to the bottom of the connecting block. The threaded slider is slidably connected to a slide rail, and the slide rail is installed on one side of the cardboard conveyor.

[0023] Preferably, a motor is installed on one side of the cardboard conveyor, and a threaded shaft is fixedly connected to the output end of the motor. One end of the threaded shaft passes through the slide rail and is rotatably connected to the other end of the slide rail through a bearing. The threaded shaft is threadedly connected to the threaded slider.

[0024] This utility model provides a dust removal device for cardboard in a packaging box printing machine. It has the following beneficial effects:

[0025] 1. This utility model features a linkage adjustment structure between the adsorption pipe and the motor-threaded shaft-threaded slider: starting the motor drives the threaded shaft to rotate, causing the threaded slider to slide along the slide rail, thus making the adsorption pipe move synchronously with the cardboard conveyor; the suction nozzles evenly distributed on the outer wall of the adsorption pipe are inclined towards the cardboard conveyor direction, forming a "dynamic covering airflow," which can not only remove impurities in the central area of ​​the cardboard, but also cover the edges and corners (covering an area of ​​100%). Simultaneously, the flexible pipe adopts a retractable corrugated pipe structure, which can adaptively expand and contract with the movement of the adsorption pipe, avoiding damage from pipe pulling.

[0026] 2. The filter mechanism of this utility model adopts a double-layer structure of "pre-filter + HEPA high-efficiency filter": the upper pre-filter (pore size 10μm) can intercept paper scraps and large dust particles, and the lower HEPA high-efficiency filter (pore size 0.3μm) can capture fine hairs (particle size 2-5μm), with a filtration efficiency of 99.97%; the flow channel core chamber inside the filter box can make the dust-laden airflow flow spirally along the channel, and pre-separate some impurities (about 30%) through centrifugal force, reducing the filter load. In addition, the rubber sealing ring on the edge of the filter plate can prevent airflow short circuit and ensure that all dust-laden airflow is filtered; the filter box adopts a detachable embedded design, and when replacing the filter, there is no need to disassemble the dust removal box, but only need to open the box door (23) to take it out, shortening the replacement time to 5-8 minutes, and there is no secondary dust leakage (leakage rate <1%).

[0027] 3. This utility model device has dual adaptation functions of "lateral movement + suction adjustment": In the lateral direction, the motor drives the adsorption pipe to slide along the slide rail, which can adapt to cardboard with a width of 200-800mm without replacing the adsorption components; in the vertical direction, the height of the adsorption pipe can be finely adjusted (adjustment range 3-10mm) through the connecting block, which can adapt to cardboard with a thickness of 1-5mm; in terms of suction adjustment, the regulating valve of the connecting pipe can adjust the suction of the branch port according to the type of impurities (dust / lint), avoiding incomplete dust removal caused by a single suction. Attached Figure Description

[0028] Figure 1 This is a perspective view of the overall structure of this utility model;

[0029] Figure 2 This is a schematic diagram of the back of the overall structure of this utility model;

[0030] Figure 3 This is a cross-sectional view of the dust collector box of this utility model;

[0031] Figure 4 This utility model Figure 3 An enlarged structural view of A in the middle.

[0032] In the diagram: cardboard conveyor 21, dust collection box 22, box door 23, dust pump 24, dust inlet pipe 25, filter housing 31, filter box 32, core chamber 33, filter plate 34, filter plate cover 35, connecting pipe 41, flexible pipe 42, adsorption pipe 43, dust suction nozzle 44, connecting block 45, threaded slider 46, slide rail 47, motor 48, threaded shaft 49. Detailed Implementation

[0033] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0034] Examples of the embodiments are shown in the accompanying drawings, wherein the same or similar reference numerals denote the same or similar elements or elements having the same or similar functions throughout. The embodiments described below with reference to the accompanying drawings are exemplary and intended to explain the present invention, and should not be construed as limiting the present invention.

[0035] Example 1:

[0036] A preferred embodiment of the dust removal device for cardboard printing machines for packaging boxes provided by this utility model is, for example... Figure 1-4 As shown: A dust removal device for cardboard in a packaging box printing machine, comprising:

[0037] Cardboard conveyor 21 is used to convey cardboard to be dusted;

[0038] Dust collection box 22 is located on one side of cardboard conveyor 21. The dust collection box 22 is equipped with an openable and closable door 23 via a hinge. The door 23 is provided with an exhaust port.

[0039] A dust pump 24 is built into the dust collection box 22, and its input end is connected to a dust inlet pipe 25.

[0040] The filter mechanism, installed on top of the dust collection box 22, includes:

[0041] The filter housing 31 has a filter nozzle in the middle, which is connected to the end of the connecting pipe 41;

[0042] The filter box 32 is detachably embedded inside the filter housing 31, and has a flow channel core chamber 33 inside, and a filter plate 34 is installed at the bottom.

[0043] The filter plate cover 35 is threaded to the bottom of the filter housing 31, and the bottom of the filter plate cover 35 is connected to the dust inlet pipe 25.

[0044] The connecting pipe 41 has two branch ports at its other end, and each branch port is connected to a flexible pipe 42.

[0045] Adsorption pipe 43 is connected between the other ends of the two flexible pipes 42;

[0046] Multiple suction nozzles 44 are connected at equal intervals on one side of the adsorption pipe 43.

[0047] Example 2:

[0048] Please see Figures 1-4 Furthermore, based on Example 1, the following is further obtained: a sealing strip is provided between the door 23 of the dust collection box 22 and the box body, and a dustproof net is covered at the exhaust port.

[0049] The filter plate 34 has a double-layer structure, with a pre-filter on the upper layer and a HEPA high-efficiency filter on the lower layer. The filter plate 34 is equipped with a rubber sealing ring at its edge.

[0050] A regulating valve is installed at each of the two branch ports of the connecting pipe 41, and the flexible pipe 42 is a retractable corrugated pipe structure.

[0051] The adsorption pipe 43 has a long strip structure and an adsorption filter element inside. The opening of the dust suction nozzle 44 is inclined towards the paperboard conveying direction.

[0052] A connecting block 45 is installed at the bottom of the adsorption pipe 43. A threaded slider 46 is fixedly connected to the bottom of the connecting block 45. The threaded slider 46 is slidably connected to the slide rail 47, which is installed on one side of the cardboard conveyor 21.

[0053] A motor 48 is installed on one side of the cardboard conveyor 21. A threaded shaft 49 is fixedly connected to the output end of the motor 48. One end of the threaded shaft 49 passes through the slide rail 47 and is rotatably connected to the other end of the slide rail 47 through a bearing. The threaded shaft 49 is threadedly connected to the threaded slider 46.

[0054] When using the equipment, first perform an initialization check: confirm that the cardboard conveyor 21 runs smoothly (without jamming), the dust collection box 22 door 23 is tightly closed (the sealing strip is not damaged), and the dust pump 24 is properly wired; check whether the filter plate 34 in the filter box 32 is intact (without damage or blockage), and whether the dust suction nozzle 44 of the adsorption pipe 43 is deformed or blocked; confirm that the threaded slider 46 slides smoothly with the slide rail 47, and that the output shaft of the motor 48 is not stuck.

[0055] Set the parameters according to the specifications of the cardboard to be dusted: If it is a 400mm wide and 3mm thick corrugated cardboard, start the motor 48 to drive the threaded shaft 49 to rotate, drive the threaded slider 46 to move along the slide rail 47, so that the length of the adsorption pipe 43 matches the width of the cardboard (400mm), and then drive the dust suction nozzle (44) to move. Open the regulating valve at the branch port of the connecting pipe 41 and set the suction power to 0.04MPa (suitable for medium and thick cardboard); if there is a lot of fuzz on the surface of the cardboard, the suction power can be appropriately increased to 0.05MPa to ensure that small impurities are adsorbed.

[0056] The equipment is started and enters the dust removal process. The cardboard conveyor 21 conveys the cardboard to be dusted to the adsorption area at a uniform speed (conveying speed 10-15m / min).

[0057] Negative pressure adsorption captures impurities: When the dust pump 24 is started, a negative pressure airflow (negative pressure value -0.03~-0.05MPa) is formed through the dust inlet pipe 25 in the filter plate cover 35, filter box 32, connecting pipe 41, flexible pipe 42, adsorption pipe 43 and dust nozzle 44; under the action of negative pressure, impurities (dust, lint, paper scraps) on the surface of the cardboard enter the adsorption pipe 43 through the dust nozzle 44. The adsorption filter element in the adsorption pipe can initially intercept some impurities (about 20%), and the remaining dust-laden airflow enters the filter box 32 through the flexible pipe 42 and connecting pipe 41.

[0058] Multi-stage filtration and purification of airflow: After the dust-laden airflow enters the filter box 32, it first flows along the spiral ribs of the flow channel core chamber 33. Through centrifugal force, large particles of impurities (such as paper scraps, with a particle size > 10μm) are thrown towards the inner wall of the core chamber and fall into the bottom of the filter box. Then, the airflow passes through the upper primary filter screen to intercept dust particles with a particle size of 5-10μm. Finally, it passes through the lower HEPA high-efficiency filter screen to capture fine lint particles with a particle size of 0.3-5μm. The purified airflow enters the dust pump 24 through the filter nozzle of the filter housing 31 and the dust inlet pipe 25, and is finally discharged from the exhaust port of the dust collection box 22 door 23 (the dustproof screen of the exhaust port can prevent external dust from entering).

[0059] Synchronous movement covering the entire width: During the paperboard conveying process, the motor 48 drives the threaded shaft 49 to rotate slowly (the rotation speed matches the paperboard conveying speed, about 0.5r / min), which drives the threaded slider 46 to move laterally along the slide rail 47, so that the adsorption pipe (43) scans laterally synchronously with the paperboard conveying; the inclined opening design of the dust suction nozzle 44 can form a "forward adsorption airflow", avoiding impurities being blown by the airflow to the undust-removed area, ensuring that impurities on the entire width of the paperboard (edges and corners) are captured, and the dust removal coverage rate reaches 100%.

[0060] Perform maintenance and cleaning after the equipment has been running for 4-6 hours (or when the suction power of the dust pump decreases significantly):

[0061] Filter assembly cleaning: Turn off the vacuum pump 24, open the door 23 of the dust collection box 22, rotate the filter plate cover 35 to separate it from the filter housing 31, and take out the filter box 32; pour out the large particles of impurities at the bottom of the filter box, and replace it with a new filter plate 34 (if the HEPA filter is not clogged, it can be cleaned by reverse blowing with compressed air and reused 1-2 times); install the new filter plate into the filter box, insert it back into the filter housing, tighten the filter plate cover, and ensure that the rubber sealing ring is sealed well.

[0062] Cleaning the adsorption assembly: If the suction nozzle 44 is clogged, loosen the fixing screws of the connecting block 45, remove the adsorption pipe 43, and clean the residual impurities in the suction nozzle with a soft brush (or blow it clean with compressed air); check if the flexible pipe 42 is damaged, and replace it with a new corrugated pipe if so; after cleaning, reinstall the adsorption pipe into the connecting block, adjust its position, and fix it.

[0063] Equipment reset: After maintenance, close the box door 23 and start the motor 48 to reset the adsorption pipe 43 to the initial position (one end of the slide rail); start the dust pump 24 and run it unloaded for 1-2 minutes to check if the suction is normal (observe through the negative pressure gauge, the negative pressure value should be stable above -0.03MPa); after confirming that there are no abnormalities, turn off the equipment and wait for the next batch of dust removal operations.

[0064] Finally, it should be noted that the above description is merely a preferred embodiment of this utility model and is not intended to limit the utility model. Although the utility model has been described in detail with reference to the foregoing embodiments, those skilled in the art can still modify the technical solutions described in the foregoing embodiments or make equivalent substitutions for some of the technical features. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of this utility model should be included within the protection scope of this utility model.

Claims

1. A carton printer board dust removal device characterized by, include: Cardboard conveyor (21) is used to convey cardboard to be dusted; A dust collector (22) is located on one side of the cardboard conveyor (21). The dust collector (22) is equipped with an openable and closable door (23) via a hinge. An exhaust port is provided on the door (23). A dust pump (24) is installed inside the dust collection box (22), and its input end is connected to a dust inlet pipe (25). The filter mechanism, installed on top of the dust collector (22), includes: The filter housing (31) has a filter nozzle in the middle, which is connected to the end of the connecting pipe (41); The filter box (32) is detachably embedded inside the filter housing (31), and has a flow channel core chamber (33) inside, and a filter plate (34) is installed at the bottom. The filter plate cover (35) is threaded to the bottom of the filter housing (31), and the bottom of the filter plate cover (35) is connected to the dust inlet pipe (25); The connecting pipe (41) has two branch ports at its other end, and each branch port is connected to a flexible pipe (42). An adsorption pipe (43) is connected between the other ends of the two flexible pipes (42); Multiple suction nozzles (44) are connected at equal intervals on the outer side of the adsorption pipe (43).

2. The printing machine paperboard dust removal device of claim 1, wherein: A sealing strip is provided between the door (23) of the dust collector (22) and the body, and a dustproof net is provided at the exhaust port.

3. The printing machine paperboard dust removal device of claim 1, wherein: The filter plate (34) has a double-layer structure, with a primary filter screen on the upper layer and a HEPA high-efficiency filter screen on the lower layer. The filter plate (34) is provided with a rubber sealing ring on its edge.

4. The printing machine paperboard dust removal device of claim 1, wherein: The two branch ports of the connecting pipe (41) are respectively equipped with regulating valves, and the flexible pipe (42) is a retractable corrugated pipe structure.

5. The printing press paperboard dust removal device of claim 1, wherein: The adsorption pipe (43) has a long strip structure and an adsorption filter element inside. The opening of the dust suction nozzle (44) is inclined towards the paperboard conveying direction.

6. The carton printer paperboard dust removal device according to claim 1, characterized in that: A connecting block (45) is installed at the bottom of the adsorption pipe (43), and a threaded slider (46) is fixedly connected to the bottom of the connecting block (45). The threaded slider (46) is slidably connected to the slide rail (47), which is installed on one side of the cardboard conveyor (21).

7. The printing press paperboard dust removal device of claim 1, wherein: A motor (48) is installed on one side of the cardboard conveyor (21). A threaded shaft (49) is fixedly connected to the output end of the motor (48). One end of the threaded shaft (49) passes through the slide rail (47) and is rotatably connected to the other end of the slide rail (47) through a bearing. The threaded shaft (49) is threadedly connected to the threaded slider (46).

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