A commercial rotary printing folding venting mechanism
By designing a paper feeding roller and annular serrated venting knife into the commercial rotary printing equipment, the problem of insufficient air expulsion during paper folding is solved, improving paper flatness and printing quality, and ensuring printing speed and cleanliness.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- HENAN DAILY GRP DAHE PRINTING CO LTD
- Filing Date
- 2025-07-11
- Publication Date
- 2026-05-26
AI Technical Summary
In existing commercial rotary printing presses, air cannot be effectively expelled when the paper is folded, resulting in air pockets that affect folding quality and post-processing effects. Furthermore, the simple structure of the air release mechanism leads to paper slippage and uneven cutting depth, which also affects printing quality.
Design a degassing mechanism for folding pages in commercial rotary printing presses, including a paper feed roller, a degassing ring groove, and an annular serrated degassing knife. The paper flatness is ensured by the rotation of the paper feed roller and the positive pressure of the degassing knife, and the cutting depth of the degassing knife is adjusted by an adjusting component to adapt to different paper thicknesses, ensuring the formation of air holes.
It effectively removes air from folded paper, improves paper flatness and print quality, prevents ink splatter, keeps the inside of the printing press clean, and increases printing speed and quality.
Smart Images
Figure CN224276587U_ABST
Abstract
Description
Technical Field
[0001] This utility model relates to the field of printing equipment technology, and in particular to a folding and degassing mechanism for commercial rotary printing presses. Background Technology
[0002] In existing commercial rotary printing folding processes, air pockets often form at the folds because air cannot be effectively expelled during the paper feeding rollers, affecting folding quality and subsequent processing results. Traditional techniques typically use simple perforation or creasing to release air, but these methods suffer from insufficient air release, paper slippage, or inaccurate perforation positioning, making it difficult to guarantee fold flatness and processing quality.
[0003] Furthermore, the existing degassing mechanisms have a relatively simple structural design, with degassing blades mostly being flat-bladed or single-toothed structures. At high speeds, uneven pressure can easily cause paper shifting, affecting folding accuracy. Simultaneously, due to the lack of effective control over the cutting depth, some blades may fail to create uniform air holes at the paper creases, resulting in poor degassing and consequently impacting the quality of the final product.
[0004] Therefore, there is an urgent need for an improved venting mechanism for folding pages in commercial printing presses to solve problems such as insufficient paper venting, slippage, and uneven cutting depth in existing technologies, thereby improving the flatness and processing quality of folding pages. Utility Model Content
[0005] In view of the above problems, this utility model is proposed to provide a venting mechanism for folding paper in a commercial grinding machine that overcomes or at least partially solves the above problems. It can solve the problem of gas present at the folding part in the paper folding process of existing grinding machines, and achieve the effect of eliminating gas at the folding part of the paper and improving the flatness of the folded paper.
[0006] Specifically, this utility model provides a folding and degassing mechanism for commercial printing presses, characterized in that it includes:
[0007] frame;
[0008] A paper feed roller is rotatably mounted on the frame for feeding paper forward; an air venting groove is provided on the circumferential surface of the paper feed roller.
[0009] The venting assembly includes a mounting rod, a venting knife, and a mounting frame. The mounting rod is parallel to the paper feed roller and mounted on the frame. The frame is mounted on the mounting rod, and a rotating wheel is rotatably mounted on the frame, located above the paper feed roller and with its axis parallel to the paper feed roller. The venting knife is a ring-shaped serrated blade and is fixedly sleeved on the rotating wheel. The venting knife is inserted into the venting ring groove.
[0010] Optionally, the mounting bracket includes a mounting ring, an extension plate, and an adjusting member;
[0011] The mounting ring is rotatably fitted onto the mounting rod; the extension plate is fixed onto the mounting ring and is arranged along the radial direction of the mounting ring; the rotating wheel is rotatably mounted on the mounting ring to adjust the depth of the venting knife inserted into the venting ring groove when the mounting ring rotates; the adjusting member is mounted on the mounting rod and connected to the mounting ring to adjust the rotation angle of the mounting ring.
[0012] Optionally, the adjusting component includes an adjusting ring, an adjusting screw, and an extension rod;
[0013] The adjusting ring is fixedly sleeved on the mounting rod; a lower adjusting block is provided at the eccentric position of the adjusting ring; the extension rod is fixedly installed on the mounting ring and is arranged along the radial direction of the mounting ring; an upper adjusting block is provided at the end of the extension rod, and the upper adjusting block and the lower adjusting block form a preset angle; both the upper adjusting block and the lower adjusting block are provided with threaded holes; the adjusting screw is sequentially inserted into the upper adjusting block and the lower adjusting block, and is threadedly connected to the upper adjusting block and the lower adjusting block.
[0014] Optionally, the adjusting member further includes an adjusting spring;
[0015] The adjusting spring is sleeved on the adjusting screw, with its upper end in contact with the upper adjusting block and its lower end in contact with the lower adjusting block.
[0016] Optionally, the venting assembly further includes two rubber sleeves; the rubber sleeves are fitted onto the rotating wheel, and the surface of the rubber sleeves is in clearance fit with the paper feeding roller; the two rubber sleeves are symmetrically arranged on both sides of the venting knife.
[0017] Optionally, the upper adjusting block and the lower adjusting block are rotatably mounted on the extension rod and the mounting ring, respectively.
[0018] In this utility model of a commercial printing press folding and degassing mechanism, a frame, a paper feeding roller, and a degassing assembly are included, with a serrated degassing knife mounted on a rotating wheel. The degassing knife is a ring-shaped cutter with serrated edges, which leaves a series of air holes on the paper as it passes through. The rotating wheel is located in front of the paper feeding roller in the conveying direction, placing it diagonally above the roller. This allows the degassing knife to apply positive pressure to the paper as the roller moves forward, preventing slippage and ensuring paper quality. The degassing ring groove ensures the depth to which the degassing knife cuts the paper, guaranteeing that each tooth leaves an air hole at the fold line. This achieves ideal degassing during folding, preventing air pockets at the fold line and significantly improving the flatness of the folded paper, thus enhancing the overall quality of the final paper processing.
[0019] Furthermore, the degassing knife removes air trapped during paper folding, ensuring ink adheres evenly to the paper and guaranteeing print quality. In high-speed printing, ink may splatter due to centrifugal force. The degassing knife effectively prevents this, keeping the printing press interior clean. In summary, by effectively removing air from paper folds and controlling ink layer thickness, the degassing knife increases printing speed while maintaining print quality.
[0020] The above and other objects, advantages and features of this utility model will become more apparent to those skilled in the art from the following detailed description of specific embodiments of this utility model in conjunction with the accompanying drawings. Attached Figure Description
[0021] The following sections will describe some specific embodiments of the present invention in a detailed manner by way of example and not limitation, with reference to the accompanying drawings. The same reference numerals in the drawings denote the same or similar parts or components. Those skilled in the art should understand that these drawings are not necessarily drawn to scale. In the drawings:
[0022] Figure 1 This is a schematic structural diagram of a commercial rotary printing folding and degassing mechanism according to an embodiment of the present invention;
[0023] Figure 2 yes Figure 1 A magnified view of a section at point A in the middle;
[0024] Figure 3 This is a schematic structural diagram of the venting component in the venting mechanism of a commercial printing folding machine according to an embodiment of the present invention.
[0025] In the diagram: 100, paper feed roller; 110, venting ring groove; 200, venting assembly; 210, mounting rod; 220, venting knife; 230, rotating wheel; 240, rubber sleeve; 300, mounting bracket; 310, mounting ring; 320, extension plate; 331, adjusting ring; 332, adjusting screw; 333, extension rod; 334, adjusting spring; 335, upper adjusting block; 336, lower adjusting block. Detailed Implementation
[0026] The following reference Figures 1 to 3 This description pertains to the deflating mechanism for printing folding pages in a commercial rotary press, according to an embodiment of the present invention. In this description, it should be understood that the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of indicated technical features. Thus, a feature defined as "first" or "second" may explicitly or implicitly include at least one of that feature, that is, include one or more of that feature. In the description of the present invention, "a plurality of" means at least two, such as two, three, etc., unless otherwise explicitly specified. When a feature "includes or contains" one or more of the features it encompasses, unless otherwise specifically described, this indicates that other features are not excluded and may be further included.
[0027] Unless otherwise expressly specified and limited, the terms "set," "install," "connect," "link," "fix," and "couple" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; 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; they can refer to the internal communication of two components or the interaction between two components, unless otherwise expressly limited. Those skilled in the art should be able to understand the specific meaning of the above terms in this utility model according to the specific circumstances.
[0028] Furthermore, in the description of this embodiment, "above" or "below" the second feature can include direct contact between the first and second features, or it can include contact between the first and second features through another feature between them. That is, in the description of this embodiment, "above," "over," and "on top" of the second feature includes the first feature being directly above or diagonally above the second feature, or simply indicates that the first feature is at a higher horizontal level than the second feature. "Below," "below," or "below" of the second feature can mean the first feature is directly below or diagonally below the second feature, or simply indicates that the first feature is at a lower horizontal level than the second feature.
[0029] In the description of this embodiment, the terms "one embodiment," "some embodiments," "illustrative embodiment," "example," "specific example," or "some examples," etc., refer to specific features, structures, materials, or characteristics described in connection with that embodiment or example, which are included in at least one embodiment or example of this utility model. In this specification, the illustrative expressions of the above terms do not necessarily refer to the same embodiment or example. Furthermore, the specific features, structures, materials, or characteristics described may be combined in any suitable manner in one or more embodiments or examples.
[0030] Figure 1 This is a schematic structural diagram of the folding and degassing mechanism for commercial rotary printing presses, such as... Figure 1 As shown, and refer to Figures 2 to 3 This utility model provides a commercial printing press folding venting mechanism, which includes a frame, a paper feeding roller 100 and a venting component 200.
[0031] The paper feed roller 100 is rotatably mounted on the frame for forward paper feeding. An air venting groove 110 is provided on the circumferential surface of the paper feed roller 100. The air venting assembly 200 includes a mounting rod 210, an air venting knife 220, and a mounting frame 300. The mounting rod 210 is parallel to the paper feed roller 100 and mounted on the frame. The frame is mounted on the mounting rod 210, and a rotating wheel 230 is rotatably mounted on the frame, located above the paper feed roller 100, with its axis parallel to the paper feed roller 100. The air venting knife 220 is a ring-shaped serrated blade, fixedly sleeved on the rotating wheel 230; the air venting knife 220 is inserted into the air venting groove 110.
[0032] Specifically, the rotating wheel 230 is located in front of the paper feeding roller 100 in the conveying direction, thus positioning the rotating wheel 230 diagonally above the paper feeding roller 100. This allows the venting knife 220 above the paper to apply positive pressure to the paper as the paper feeding roller 100 conveys forward, preventing paper slippage and ensuring paper quality. Furthermore, the venting ring groove 110 ensures the venting knife 220 cuts the paper to a sufficient depth, ensuring that each tooth of the venting knife 220 leaves an air hole at the paper crease, achieving an ideal venting effect when the paper is folded, thus preventing air pockets from forming at the fold during the folding process. Furthermore, the venting knife 220 is a ring-shaped blade with serrated edges, leaving a series of air holes on the paper as it passes through, significantly improving the flatness of the subsequent folding.
[0033] Furthermore, the de-airing knife 220 removes air during the paper folding process, ensuring that the ink adheres evenly to the paper to guarantee print quality. Therefore, during high-speed printing, ink may splatter due to centrifugal force. The de-airing knife 220 effectively prevents this from happening, keeping the printing press interior clean. In summary, by effectively removing air during paper folding and controlling ink layer thickness, the de-airing knife can improve printing speed while ensuring print quality.
[0034] During operation, the paper feed roller 100 is driven to rotate by the drive mechanism. As the paper feed roller 100 rotates, it moves the paper forward, with the folded portion of the paper located on the venting ring groove 110. When the paper passes the venting knife 220, the venting knife 220 cuts the paper. As the paper feed roller 100 moves the paper forward, it drives the venting knife 220 to rotate, cutting along the direction of paper movement to form a row of air holes. Because the air holes are located at the folded portion of the paper, the paper is folded along the row of air holes in the next step.
[0035] In some embodiments of this utility model, such as Figure 2 and Figure 3 As shown, the mounting bracket 300 includes a mounting ring 310, an extension plate 320, and an adjusting member. The mounting ring 310 is rotatably fitted onto the mounting rod 210, and the extension plate 320 is fixed to the mounting ring 310, with the extension plate 320 arranged radially along the mounting ring 310. A rotating wheel 230 is rotatably mounted on the mounting ring 310 to adjust the depth to which the venting knife 220 inserts into the venting ring groove 110 when the mounting ring 310 rotates. The adjusting member is mounted on the mounting rod 210 and connected to the mounting ring 310, used to adjust the rotation angle of the mounting ring 310.
[0036] Specifically, the adjusting ring 331 can control the depth to which the blades of the venting knife 220 insert into the venting ring groove 110 by rotation. This allows the venting knife 220 to form venting holes on papers of different thicknesses. When the paper is thick, the venting knife 220 needs to be inserted a greater depth into the venting ring groove 110 to form an ideal venting hole. Conversely, when the paper is thin, the venting knife 220 needs to be inserted a smaller depth into the venting ring groove 110. Therefore, the adjustable depth of the venting knife 220 increases the applicability of the venting mechanism, thereby improving its utilization rate.
[0037] In some embodiments of this utility model, such as Figure 2 and Figure 3As shown, the adjusting component includes an adjusting ring 331, an adjusting screw 332, and an extension rod 333. The adjusting ring 331 is fixedly sleeved on the mounting rod 210, and a lower adjusting block 336 is provided at the eccentric position of the adjusting ring 331. The extension rod 333 is fixedly mounted on the mounting ring 310 and is arranged along the radial direction of the mounting ring 310. An upper adjusting block 335 is provided at the end of the extension rod 333, and the upper adjusting block 335 and the lower adjusting block 336 form a preset angle. Both the upper adjusting block 335 and the lower adjusting block 336 are provided with threaded holes, and the adjusting screw 332 is sequentially inserted into the upper adjusting block 335 and the lower adjusting block 336 and threadedly connected to the upper adjusting block 335 and the lower adjusting block 336.
[0038] Specifically, the extension rod 333 and the extension plate 320 are located on both sides of the mounting ring 310, so that the extension rod 333 moves downward and drives the extension plate 320 upward through the mounting ring 310. Further, the adjusting ring 331 is provided with an eccentric protrusion, and the lower adjusting block 336 is disposed on the eccentric protrusion. A preset angle exists between the extension rod 333 and the eccentric protrusion, so that the upper adjusting block 335 and the lower adjusting block 336 form a preset angle. Since the adjusting ring 331 is fixedly fitted, the vertical position of the lower adjusting block 336 remains unchanged. Therefore, when the adjusting screw 332 is rotated, the upper adjusting block 335 and the lower adjusting block 336 can move closer or further apart, thereby changing the angle between the eccentric protrusion and the extension rod 333, and thus adjusting the depth of the venting knife 220 inserted into the venting ring groove 110. When the angle between the eccentric protrusion and the extension rod 333 increases, the length of the venting knife 220 inserted into the venting ring groove 110 decreases, and vice versa.
[0039] In some embodiments of this utility model, such as Figure 2 and Figure 3 As shown, the adjusting component also includes an adjusting spring 334. The adjusting spring 334 is sleeved on the adjusting screw 332, with its upper end in low contact with the upper adjusting block 335 and its lower end in low contact with the lower adjusting block 336.
[0040] Specifically, when the angle between the eccentric protrusion of the adjusting ring 331 and the extension rod 333 decreases due to the adjusting screw 332 controlling the adjustment ring 332, the adjusting spring 334 is compressed and stores energy. The upper end of the adjusting spring 334 applies an upward elastic force to the upper adjusting block 335, thereby preventing the fit clearance between the adjusting screw 332 and the upper adjusting block 335 from shaking, thus playing a buffering role and ensuring the stability of the air release knife 220 during the cutting process. Furthermore, when the angle between the eccentric protrusion of the adjusting ring 331 and the extension rod 333 increases due to the adjusting screw 332 controlling the adjustment ring 332, the adjusting spring 334 pushes the upper adjusting block 335 upward as the adjusting screw 332 rotates, thereby reducing the difficulty of operation and improving the convenience of adjustment.
[0041] In some embodiments of this utility model, such as Figure 2 and Figure 3 As shown, the venting assembly 200 also includes two rubber sleeves 240. The rubber sleeves 240 are fitted onto the rotating wheel 230, and the surface of the rubber sleeves 240 is in clearance fit with the paper feeding roller 100. The two rubber sleeves 240 are symmetrically arranged on both sides of the venting knife 220.
[0042] Specifically, the rubber sleeve 240, together with the paper feed roller 100, clamps the paper, thereby enabling the air venting knife 220 to cut air vents into the paper. The rubber sleeve 240 also prevents localized stress on the paper, thus ensuring the cutting quality and efficiency of the air vents. In this embodiment, the drive wheel is mounted on the extension plate 320 via bearings, and the drive wheel is detachable for easy replacement.
[0043] In some embodiments of this utility model, such as Figure 2 and Figure 3 As shown, the upper adjusting block 335 and the lower adjusting block 336 are rotatably mounted on the extension rod 333 and the mounting ring 310, respectively. Specifically, since the adjusting screw 332 is vertically mounted, the corresponding threaded hole also needs to be kept vertical. Therefore, the rotatable mounting of the upper adjusting block 335 and the lower adjusting block 336 ensures that the adjusting screw 332 will be locked when rotating, thereby increasing the adjustment flexibility and range.
[0044] Therefore, those skilled in the art should recognize that although many exemplary embodiments of the present invention have been shown and described in detail herein, many other variations or modifications conforming to the principles of the present invention can be directly determined or derived from the disclosure of the present invention without departing from the spirit and scope of the present invention. Therefore, the scope of the present invention should be understood and recognized as covering all such other variations or modifications.
Claims
1. A folding and degassing mechanism for commercial printing presses, characterized in that, include: frame; A paper feed roller is rotatably mounted on the frame for feeding paper forward; an air venting groove is provided on the circumferential surface of the paper feed roller. The venting assembly includes a mounting rod, a venting knife, and a mounting frame. The mounting rod is parallel to the paper feed roller and mounted on the frame. The frame is mounted on the mounting rod, and a rotating wheel is rotatably mounted on the frame, located above the paper feed roller and with its axis parallel to the paper feed roller. The venting knife is a ring-shaped serrated blade and is fixedly sleeved on the rotating wheel. The venting knife is inserted into the venting ring groove.
2. The commercial printing folding and degassing mechanism according to claim 1, characterized in that, The mounting bracket includes a mounting ring, an extension plate, and an adjusting component; The mounting ring is rotatably fitted onto the mounting rod; the extension plate is fixed onto the mounting ring and is arranged along the radial direction of the mounting ring; the rotating wheel is rotatably mounted on the mounting ring to adjust the depth of the venting knife inserted into the venting ring groove when the mounting ring rotates; the adjusting member is mounted on the mounting rod and connected to the mounting ring to adjust the rotation angle of the mounting ring.
3. The commercial printing folding and venting mechanism according to claim 2, characterized in that, The adjusting component includes an adjusting ring, an adjusting screw, and an extension rod; The adjusting ring is fixedly sleeved on the mounting rod; a lower adjusting block is provided at the eccentric position of the adjusting ring; the extension rod is fixedly installed on the mounting ring and is arranged along the radial direction of the mounting ring; an upper adjusting block is provided at the end of the extension rod, and the upper adjusting block and the lower adjusting block form a preset angle; both the upper adjusting block and the lower adjusting block are provided with threaded holes; the adjusting screw is sequentially inserted into the upper adjusting block and the lower adjusting block, and is threadedly connected to the upper adjusting block and the lower adjusting block.
4. The commercial printing folding and degassing mechanism according to claim 3, characterized in that, The adjusting component also includes an adjusting spring; The adjusting spring is sleeved on the adjusting screw, with its upper end in contact with the upper adjusting block and its lower end in contact with the lower adjusting block.
5. The commercial printing folding and degassing mechanism according to claim 1, characterized in that, The venting assembly also includes two rubber sleeves; the rubber sleeves are fitted onto the rotating wheel, and the surface of the rubber sleeves is in clearance fit with the paper feeding roller; the two rubber sleeves are symmetrically arranged on both sides of the venting knife.
6. The commercial printing folding and degassing mechanism according to claim 3, characterized in that, The upper adjusting block and the lower adjusting block are rotatably mounted on the extension rod and the mounting ring, respectively.