Brush roll type simple device for removing powder in paper feeding of offset press

Abstract

A brush roller type simple device for paper conveying and powder removal of an offset press is characterized in that a sweeping and sucking roller (9) is mounted on the upper side of a paper conveying plate (5), namely the lower side of a paper pressing frame (4), a shaft tube with dust collection holes formed in the outer wall is arranged on the middle shaft part of the sweeping and sucking roller (9), and rolling brushes are uniformly and densely planted on the outer wall of the shaft tube. A group of sweeping and sucking rollers (9) are arranged above a paper conveying plate of the offset press, namely below a paper feeding cam, rolling brushes are arranged on the surfaces of the sweeping and sucking rollers (9), dust sucking holes are formed in shaft tube walls of the sweeping and sucking rollers, and then the outer ends of shaft tubes of the sweeping and sucking rollers are led out through a vacuum pump to be communicated to a winnowing separation box (12). And the dust is swept and collected by the sweeping and sucking roller and is separated and recycled. The dust is sucked out through online high-speed dust sweeping and centripetal axial flow negative pressure, cleaning and recycling are conducted after winnowing separation is combined, the dust removal rate reaches 70% or above, it is guaranteed that a printing face is not scratched, the dust removal speed is high, the dust removal effect is good, and overlying repeated pollution is prevented. The structure is simple and safe, installation and maintenance are easy, adverse effects on an original offset press equipment structure and a production process are avoided, and equipment working performance and product printing quality are remarkably improved.

Description

Technical Field

[0001] The utility model belongs to the technical field of printing machinery or printing machine cleaning devices of IPC classification B41F35 / 00, and in particular relates to a structural innovation and improvement technology for improving an offset printing machine with a simple powder removal device. Background Art

[0002] An offset press is a type of flatbed press. The printed image is first printed on the rubber cylinder from the printing plate, and then transferred to the paper by the rubber cylinder. During the high-speed printing process of the offset press, in order to prevent the ink layer of the printed pattern from sticking to the paper when the paper is collected and stacked, a powder spraying device is usually used to spray the printed product with powder to prevent sticking. When a single-sided multi-color offset press prints the reverse side for the second time, due to excessive powder spraying on the printed surface, the rubber cloth needs to be cleaned frequently, which seriously affects the printing efficiency and quality, and also causes a series of problems such as missing numbers. Moreover, in the packaging printing process, many packaging printing factories adopt the method of spraying powder on the packaging printed products to solve the common problem of rubbing caused by the ink not drying, but the remaining powder spraying brings trouble to the post-printing processing process; the lamination is not firmly adhered, there are more snowflakes, the effect after glazing is not good, there are pitting on the surface, especially for large-scale high-end packaging printed products, the powder spraying is not clean, and the effect after lamination or glazing is poor. Therefore, powder cleaning measures need to be taken before surface treatment of the printed product.

[0003] In response to these existing problems, there are many corresponding improvement technologies. Manual powder removal methods include using feather dusters to remove powder or other manual methods to remove powder. Manual powder removal has poor effect, low efficiency, and is prone to secondary pollution.

[0004] Improved technologies for mechanical powder removal such as:

[0005] 1. Clear water coating powder removal machine: The clear water coating powder removal machine adopts a rubber roller coating system to apply clear water to the printed matter through a rubber roller. During the coating process, the wet water film on the rubber roller will adhere to and remove the printing powder to achieve the purpose of powder removal.

[0006] 2. Single-sided powder removal machine with brush stick sweeping and powder suction: This type of powder removal machine uses a brush stick to sweep powder on one side, and at the same time uses an air suction pump to remove the printed powder on the paper surface.

[0007] 3. Electric heating roller hot pressing powder removal machine: This type of powder removal machine is heated and pressed by an electric heating roller; the hot pressing roller electrostatically absorbs the printed powder to remove powder, and removes the ink adhesion powder layer through hot pressing.

[0008] Chinese patent application 202021808355.0 relates to a powder removal mechanism for an offset printing press, comprising a base, a powder removal box is installed on the top wall of the base near one side, a partition is fixedly installed on the inner wall of the powder removal box near the bottom, a storage cavity is provided below the partition, and a collection box is slidably connected in the storage cavity, a second filter mechanism and a first filter mechanism are respectively provided above the partition near the left and right sides, the first filter mechanism comprises a first frame, a filter net is welded on the inner wall of the first frame, the second filter mechanism comprises a second frame, filter paper is provided inside the second frame, a feeding hole is provided inside the partition below the second filter mechanism and the first filter mechanism, an offset printing press body is provided on the right side of the powder removal box, a powder removal pipe is connected to the right side of the powder removal box, and the powder removal mechanism of the offset printing press is convenient for discharging paper powder generated when the offset printing press is working out of the offset printing press.

[0009] Chinese patent application 202210358632.X relates to a paper feeding device of an offset printing press, which is installed on the frame of the offset printing press, and includes a paper feeding table, a paper receiving mechanism arranged at the front end of the paper feeding table, a guiding mechanism arranged at the rear end of the paper feeding table, and a transmission mechanism; the paper receiving mechanism has a paper receiving roller that swings up and down periodically, and an upper paper pressing wheel is arranged above the paper receiving roller. The paper fed by the paper separation mechanism of the offset printing press is sent to the paper feeding table for transmission through the friction force between the paper receiving roller and the paper pressing wheel; the paper feeding table has multiple paper feeding belts that receive the paper fed by the paper receiving mechanism and transfer the paper to the guiding mechanism for positioning; the guiding mechanism has a front guide, and the front guide performs an upward swinging motion to position the leading edge of the paper conveyed by the paper feeding belt; the transmission mechanism has a primary rotating shaft that inputs power and transmits the power to the paper receiving mechanism, the paper feeding table and the guiding mechanism.

[0010] The powder removal effect of the machine is good and efficient, and more and more manufacturers are using this method. However, due to the different powder removal structures designed by the manufacturers of powder removal equipment, some powder removal effects are not ideal, the powder is not removed cleanly, and some can be removed well at the beginning, but cannot be removed cleanly after working for a period of time, etc. The powder removal machine itself has differences in design principles and quality, and the performance of the machine is different. Utility Model Content

[0011] The technical problem to be solved by the utility model is that in view of the above existing problems and technical requirements, the utility model proposes a new powder removal mechanical device, which can realize online powder removal in an economical and simple manner.

[0012] To this end, the utility model includes: a sweeping and suction roller and an air separation box. A paper feeding belt is wound between the front and rear ends of the paper feeding board, and a tensioning wheel is arranged on the lower side of the paper feeding board to tighten the upper surface of the lower section of the paper feeding belt; a paper pressing frame is arranged on the upper side of the paper feeding board, and a paper pressing sheet is arranged on the lower side of the front end of the paper pressing frame to press against the middle and rear sections of the upper surface of the paper feeding board, and a paper pressing roller is installed on the lower side of the rear end of the paper pressing frame, and a transfer roller is installed on the rear end of the paper pressing frame to extend to the rear side, and the transfer roller is crimped with the rear end shaft roller of the paper feeding belt, and a paper feeding cam is installed on the upper side of the paper feeding board; a sweeping and suction roller is installed on the upper side of the paper feeding board, that is, the lower side of the paper pressing frame, and the central axis of the sweeping and suction roller has an axis tube with dust suction holes on the outer wall, and roller brushes are evenly and densely planted on the outer wall of the axis tube.

[0013] Wherein, the sweeping and suction roller is installed on the lower side of the paper feeding cam.

[0014] The end of the shaft tube of the sweeping and suction roller is coaxially slidably connected to the vacuum pump through the shaft connection plate, and the vacuum pump is connected to the air separation box. The waste discharge pipe and the recovery pipe are connected to the outer wall of the air separation box. The air separation box is connected to the powder spraying device. A vibration reduction base is installed at the bottom of the vacuum pump and the air separation box. A filter frame is arranged in the air separation box, and a filter screen is arranged in the middle of the filter frame. The bottom corner of the filter frame adopts an arc edge structure.

[0015] In particular, the paperboard is made of multi-layer wood boards with an inclination angle of 5-15°.

[0016] In particular, a paper feeding cam is installed at the lower rear side of the paper pressing frame, or the paper feeding cam can also be arranged at the upper front and rear ends of the paper feeding board.

[0017] Compared with the prior art, the beneficial effects of the utility model are:

[0018] Online high-speed powder sweeping, centripetal axial flow negative pressure suction dust, and combined with air separation after clean reuse, the powder removal rate reaches more than 70%, and ensures that the printing surface is not scratched, the powder removal speed is high and the effect is good, preventing overlapping and repeated pollution. The structure is simple and safe, easy to install and maintain, has no adverse effects on the original offset printing machine equipment structure and production process, and significantly improves the equipment performance and product printing quality. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] The following drawings are for illustration only and should not be construed as limiting the present invention in any way. By referring to the following drawings, readers can understand the embodiments of the present invention and further understand the advantages and technical features of the present invention.

[0020] Figure 1 This is a schematic structural diagram of Example 1 of the utility model.

[0021] Figure 2 This is a schematic diagram of the installation connection structure between the sweeping and suction roller and the air separation box in Example 1 of the utility model.

[0022] Reference numerals include:

[0023] Paper pressing roller 1, brush 2, paper pressing sheet 3, paper pressing frame 4, paper feeding board 5, paper feeding roller 6, tensioning wheel 7, paper feeding line belt 8; sweeping and suction roller 9, shaft connecting plate 10, vacuum pump 11, air separation box 12, waste discharge pipe 13, recovery pipe 14, powder spraying device 15, vibration reduction base 16, transfer roller 17, paper feeding cam 18. DETAILED DESCRIPTION

[0024] It should be noted that:

[0025] The terms "comprise", "comprises", "having" and any variations thereof are intended to cover other possible options under the same logic that are not listed. For example, a process, method, system, product or apparatus that includes a series of steps or units is not necessarily limited to those steps or units explicitly listed, but may include other steps or units that are not explicitly listed or inherent to these processes, methods, products or apparatus.

[0026] In the description of the present utility model, the terms "center", "up", "down", "left", "right", "vertical", "horizontal", "inside", "outside" and the like indicate positions or positional relationships based on the positions or positional relationships shown in the accompanying drawings, or the positions or positional relationships in which the utility model product is usually placed when in use, and are only for the convenience of describing the present utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on the present utility model. In addition, the terms "first", "second", "third" and the like are only used to distinguish the description, and cannot be understood as indicating or implying relative importance. In addition, the terms "horizontal", "vertical", "overhanging" and the like do not mean that the components are required to be absolutely horizontal or overhanging, but can be slightly tilted. For example, "horizontal" only means that its direction is more horizontal relative to "vertical", and does not mean that the structure must be completely horizontal, but can be slightly tilted.

[0027] In the description of the present invention, it is also necessary to explain that, unless otherwise clearly specified and limited, the terms "set", "install", "connect", and "connect" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection, or it can be indirectly connected through an intermediate medium, or it can be the internal communication of two components. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0028] In order to enable those skilled in the art to better understand the scheme of the utility model, the technical scheme in the embodiment of the utility model will be clearly and completely described below in conjunction with the drawings in the embodiment of the utility model. Obviously, the described embodiment is only an embodiment of a part of the utility model, rather than all the embodiments.

[0029] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by ordinary technicians in the field to which the utility model belongs. When there is a conflict, the definitions in this specification shall prevail.

[0030] The principle of the utility model is that a group of sweeping and sucking rollers 9 with roller brushes on the surface and dust suction holes on the shaft tube wall are installed above the offset printing machine feeding paperboard, that is, below the paper feeding cam, and then the outer end of the shaft tube of the sweeping and sucking roller 9 is connected to the air separation box 12 through a vacuum pump. When the equipment is working, the paper surface is automatically de-dusted, and the sweeping and sucking roller 9 sweeps and absorbs the collected dust and separates it for reuse.

[0031] In the present invention, the sweeping roller 9 is provided mainly to remove paper scraps and dust on the surface of the paper to ensure the printing quality and the normal operation of the machine.

[0032] The utility model comprises: a sweeping and suction roller 9 and an air separation box 12.

[0033] The utility model is further described below in conjunction with the accompanying drawings and embodiments.

[0034] Although the embodiments of the present invention are described in conjunction with the accompanying drawings, those skilled in the art may make various modifications and variations without departing from the spirit and scope of the present invention, and such modifications and variations are all within the scope defined by the appended claims.

[0035] The content of the present invention can be more easily understood by selecting the following preferred implementation methods and embodiments of the present invention. Unless otherwise specified, all technical and scientific terms used herein have the same meanings as those commonly understood by ordinary technicians in the field to which the present invention belongs. When there is a conflict, the definition in this specification shall prevail.

[0036] Embodiment 1: As attached Figure 1As shown, a paper feed belt 8 is wound between the front and rear ends of the paper feed board 5, and a tensioning wheel 7 is arranged on the lower side of the paper feed board 5 to press against the upper surface of the lower section of the paper feed belt 8; a paper pressing frame 4 is arranged on the upper side of the paper feed board 5, and a paper pressing sheet 3 is arranged on the lower side of the front end of the paper pressing frame 4 to press against the middle and rear section of the upper surface of the paper feed board 5, and a paper pressing roller 1 is installed on the lower side of the rear end of the paper pressing frame 4, and a transfer roller 17 is installed on the rear end of the paper pressing frame 4 to extend to the rear side, and the transfer roller 17 is crimped with the rear end shaft roller of the paper feed belt 8, and a paper feeding cam 18 is installed on the lower side of the middle and rear part of the paper pressing frame 4. A sweeping roller 9 is installed on the upper side of the paper feed board 5, that is, the lower side of the paper pressing frame 4, and the central axis of the sweeping roller 9 has an axis tube with dust suction holes on the outer wall, and roller brushes are evenly and densely planted on the outer wall of the axis tube.

[0037] In the foregoing, the sweeping roller 9 is installed on the lower side of the paper feeding cam 18.

[0038] In the foregoing, as attached Figure 2 As shown, the shaft tube end of the sweeping and suction roller 9 is coaxially slidably connected to the vacuum pump 11 through the shaft connecting plate 10, and the vacuum pump 11 is connected to the air separation box 12.

[0039] In the above, further, a waste pipe 13 and a recovery pipe 14 are connected to the outer wall of the air separation box 12.

[0040] In the foregoing, further, the air separation box 12 is connected to the powder spraying device 15 .

[0041] In the above, further, a vibration-damping base 16 is installed at the bottom of the vacuum pump 11 and the air separation box 12 .

[0042] In the above, a filter frame is arranged in the air separation box 12, a filter screen is arranged in the middle of the filter frame, and the bottom corners of the filter frame adopt an arc-shaped edge structure.

[0043] In the foregoing, the surface of the transfer roller 17 is covered with a rubber blanket.

[0044] In the embodiment of the utility model, the function of the paper pressing roller 1 is to increase the friction between the paper feeding line belt 8 and the paper. When the front end of the first paper hits the front gauge, the tangent point of the pair of paper pressing rollers 1 should press the tail of the paper or be 2-3mm away from the tail of the paper. The pressure of the paper pressing roller 1 should be adjustable. The function of the brush 2 is to prevent the paper from rebounding and stabilize the paper. The function of the paper pressing sheet 3 is to prevent the paper from bulging or tilting upward during the transportation process. The installation of the paper pressing sheet should make the tightness symmetrical, so as not to affect the pulling of the side pull gauge and enable the paper to pass smoothly. The paper pressing frame 4 plays a supporting role. One end of it is fixed in the wall panel, and the other end can be lifted up in case of failure, such as double sheets or disorderly sheets, to remove waste paper. The surface of the paper feeding board 5 should be smooth and the friction of the paper should not generate static electricity. The paper feeding board 5 adopts a multi-layer wooden board with an inclination angle of 5-15° and a paper feeding speed V=0.5-0.65m / s; the paper feeding step selection should ensure that the positioning and transportation of adjacent papers do not interfere with each other. The vacuum pump 11 and the air separation box 12 are fixedly mounted on the vibration damping base 16 by fixing bolts. This is to absorb and overcome the influence of the vibration of the vacuum pump 11 and the air separation box 12 on the printing operation. The surface of the paper feed roller 6 and the contact point of the paper feed line belt 8 are smooth. The paper moves forward on the paper feed board 5 by the friction of the paper feed line belt 8. Its uniformity of transportation has a great influence on the overprinting accuracy of the machine. The uniformity is related to the materials of the tensioning device and the cloth belt.

[0045] In the embodiment of the utility model, the blanket is a covering of the transfer cylinder on the offset printing machine; a component of the lining. The blanket is a composite material product consisting of a rubber coating and a fabric substrate, and is used to transfer ink from a printing plate to a substrate in indirect lithography.

[0046] In the embodiment of the utility model, further, the paper feeding cam 18 can also be arranged on the upper side of the front and rear ends of the paper feeding paperboard 5. Alternatively, the setting position of the paper feeding cam 18 can be adjusted to a limited extent.

[0047] Preferably, the sweeping roller 9 is installed 5 cm below the paper feeding cam 18. A row of roller brushes made of flannel material is installed on the steel pipe. When the second printed paper passes through the paper feeding cam and reaches the paper feed board, the flannel brush on the steel pipe gently touches the paper. The flannel roller brush will effectively remove part of the dust on the printing surface, thereby reducing the number of times the elephant leather cloth is cleaned, achieving the purpose of reducing loss, improving efficiency and ensuring quality.

[0048] Preferably, the central shaft tube body of the sweeping and suction roller 9 is made of a φ8㎜ steel tube, and the surface of the shaft tube body is sleeved with a sleeve made of nylon, polyester fiber or other materials and is evenly and densely flocked with a roller brush made of velvet cloth. The two ends of the sweeping and suction roller 9 are installed on the equipment support structure on both sides of the conveyor board 5.

[0049] In the embodiment of the utility model, when the second-printed paper passes through the paper feed board 5 and is about to reach the paper feeding cam 18, the flannel brush on the sweeping and suction roller 9 gently touches the paper, and the flannel roller brush will effectively sweep and peel off the dust on the printing surface and remove part of it. At the same time, the negative pressure suction holes on the surface of the sweeping and suction roller 9 will also synchronously inhale more dust and quickly input it into the air separation box 12, and risk separation is performed according to the different densities of the dust and other small amounts of impurities. Then, the impurities are first discharged through the waste discharge pipe 13; the separated dust is introduced into the powder spraying device 15 for reuse through the recovery pipe 14 with negative pressure. This reduces and avoids dust contamination of the printed surface, improves printing quality, and reduces the number of times the rubber cloth on the surface of the transfer roller 17 is cleaned, thereby achieving the purpose of reducing loss, improving efficiency and ensuring quality.

[0050] In the embodiment of the utility model, the pressure between the sweeping roller 9 and the paper needs to be adjusted appropriately to ensure that the paper scraps and dust can be effectively removed while avoiding damage to the paper. The wear of the sweeping roller 9 should be checked regularly. If the bristles are found to be severely worn or deformed, a new brush roller should be replaced in time. The sweeping roller 9, the air separation box 12, the waste pipe 13 and the recovery pipe 14 need to be kept clean; they need to be cleaned regularly to remove attached paper scraps and dust, maintain their cleanliness, and ensure their normal operation.

[0051] Based on the above embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work should fall within the scope of protection of the present invention, so as to avoid exhaustively listing all implementation methods that are unnecessary and impossible to list comprehensively.

Claims

1. A simple brush roller device for removing powder from paper feeding in an offset printing machine, comprising a sweeping and suction roller (9) and an air separation box (12); characterized in that: A paper feed belt (8) is wound between the front and rear ends of the paper feed board (5), and a tensioning wheel (7) is arranged on the lower side of the paper feed board (5) to press against the upper surface of the lower section of the paper feed belt (8); a paper pressing frame (4) is arranged on the upper side of the paper feed board (5), and a paper pressing sheet (3) is arranged at the lower side of the front end of the paper pressing frame (4) to press against the middle and rear section of the upper surface of the paper feed board (5); a paper pressing roller (1) is arranged on the lower side of the rear end of the paper pressing frame (4), and a transfer roller (17) is arranged to extend from the rear end of the paper pressing frame (4) to the rear side, and the transfer roller (17) is arranged to be pressed against the rear end shaft roller of the paper feed belt (8); and a paper feeding cam (18) is arranged on the upper side of the paper feed board (5); a sweeping roller (9) is arranged on the upper side of the paper feed board (5), i.e., the lower side of the paper pressing frame (4), and the central axis of the sweeping roller (9) is provided with an axis tube with dust suction holes on the outer wall, and roller brushes are evenly and densely planted on the outer wall of the axis tube.

2. The simple brush roller device for removing powder from paper feeding in an offset printing press according to claim 1, characterized in that: The sweeping and suction roller (9) is installed on the lower side of the paper feeding cam (18).

3. The simple brush roller device for removing powder from paper feeding in an offset printing press according to claim 1, characterized in that: A paper feeding cam (18) is installed at the lower rear side of the paper pressing frame (4).

4. The simple brush roller device for removing powder from paper feeding in an offset printing press according to claim 1, characterized in that: The paper feeding cam (18) is arranged on the upper sides of the front and rear ends of the paper feeding paper board (5).

5. The simple brush roller device for removing powder from paper feeding in an offset printing press according to claim 1, characterized in that: The end of the shaft tube of the sweeping and suction roller (9) is coaxially slidably connected to a vacuum pump (11) via a shaft connection plate (10), and the vacuum pump (11) is connected to a gas separation box (12).

6. The simple brush roller device for removing powder from paper feeding in an offset printing press according to claim 1, characterized in that: The paperboard (5) is made of multi-layer wood and has an inclination angle of 5-15°.

7. The simple brush roller device for removing powder from paper feeding in an offset printing press according to claim 5, characterized in that: A waste discharge pipe (13) and a recovery pipe (14) are connected to the outer wall of the air separation box (12).

8. The simple brush roller device for removing powder from paper feeding in an offset printing press according to claim 5, characterized in that: The air separation box (12) is connected to the powder spraying device (15).

9. The simple brush roller device for removing powder from paper feeding in an offset printing press according to claim 5, characterized in that: A vibration-damping base (16) is installed at the bottom of the vacuum pump (11) and the air separation box (12).

10. The simple brush roller device for removing powder from paper feeding in an offset printing press according to claim 5, characterized in that: A filter frame is arranged in the air selection separation box (12), a filter screen is arranged in the middle of the filter frame, and the bottom corners of the filter frame adopt an arc-shaped edge structure.

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