Eight-opening slitting knife of rotary folding machine
By combining the arc-shaped circular blade with the ring cutting groove and using a stable fixing method, the problem of rapid wear of the slitting blade in the rotary folding machine is solved, achieving high-quality paper slitting and extending the blade life, while reducing maintenance costs.
Patent Information
- Application Number
- CN202520484107.1
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2025-03-19
- Publication Date
- 2026-01-13
- Estimated Expiration
- 2035-03-19
AI Technical Summary
The circular blades of existing rotary slitting machines are prone to wear during paper cutting, leading to printing defects such as smearing and rough edges, which affect the cutting quality and service life.
The design employs a curved circular blade and a ring cutting groove, combined with the principle of rotary shearing. The curvature of the curved circular blade and the inclined inner side of the ring cutting groove reduce wear and improve the smoothness of the cutting edge. The stability of the blade is ensured by the fixing method of bearings and chuck, and it is equipped with flexible rubber wheels and protective covers to enhance the fit and protection.
It improves paper slitting quality, reduces blade wear, extends service life, and lowers maintenance costs.
Smart Images
Figure CN223792638U_ABST
Abstract
Description
Technical Field
[0001] This application relates to the field of folding machine technology, and in particular to an eight-open slitting blade for a rotary folding machine. Background Technology
[0002] In modern rotary folding machines, the circular blade used for slitting the paper at an 8-fold is a straight blade. It utilizes the sharpness of the blade and the pressure rollers on both sides to cut the paper. During the folding process, the pressure rollers on both sides of the blade are prone to smudging. Without pressure, because the blade is cutting soft material with hard material, it wears out quickly. When the blade becomes dull, problems such as rough edges appear, causing folding printing defects. Utility Model Content
[0003] To address the aforementioned problems, improve paper slitting quality, reduce cutter wear, extend cutter life, and save maintenance costs, this application provides an eight-open slitting cutter for a rotary folding machine.
[0004] The technical solution provided in this application for an eight-opening slitting knife for a rotary folding machine is as follows.
[0005] An eight-opening slitting blade for a rotary folding machine includes: a rotating shaft and an arc-shaped circular blade on the rotating shaft. The arc-shaped circular blade is clamped by a chuck on the rotating shaft. The arc-shaped circular blade is arranged in an arc shape from the center of the shaft to the edge. The diameter of the arc-shaped circular blade is larger than that of the chuck.
[0006] A roller body is provided abutting against the surface of the clamping roller, and an annular cutting groove is provided on the roller body. The arc-shaped circular cutter is in clearance fit with one inner side of the annular cutting groove.
[0007] The clamping plate includes a first clamping plate and a second clamping plate. The first clamping plate is mounted on the rotating shaft via a first bearing, and the second clamping plate is mounted on the rotating shaft via a second bearing. The arc-shaped circular cutter abuts against the first clamping plate and the second clamping plate sequentially from the axis center to the edge.
[0008] By adopting the above technical solution, the blade is designed as an arc-shaped circular blade with a certain curvature. The arc-shaped circular blade extends into the annular cutting groove of the roller body and cooperates with one inner side of the annular cutting groove. Using the rotary shearing principle, the paper is cut. This cutting method results in smooth, burr-free paper edges, improving the paper cutting quality, reducing blade wear, extending service life, and saving maintenance costs. The arc-shaped circular blade is clamped and fixed by the first and second clamping plates and rotated on the rotating shaft through the first and second bearings, achieving stable and reliable installation.
[0009] Optionally, the rotating shaft is provided with a shoulder, the inner rings of the first bearing and the second bearing near each other abut against the shoulder, and a first limiting groove is provided on the rotating shaft at the ends of the first bearing and the second bearing far apart, and a first retaining ring is provided in the first limiting groove to abut against the first bearing and the second bearing.
[0010] By adopting the above technical solution, the first bearing and the second bearing are positioned by setting the shaft shoulder and the first retaining ring, thus preventing the axial movement of the first bearing and the second bearing.
[0011] Optionally, the inner hole of the first clamping plate is provided with a second limiting groove, and a second retaining ring is provided in the second limiting groove to abut against the outer ring of the first bearing.
[0012] By adopting the above technical solution, the axial movement of the first clamping plate can be restricted by the setting of the second retaining ring in the second limiting groove, ensuring that the first clamping plate can abut against the arc-shaped round knife, and the arc-shaped round knife can apply a thrust to the first clamping plate, ensuring that the second retaining ring abuts against the first bearing.
[0013] Optionally, bolt holes are provided at corresponding positions of the first and second clamping plates along the circumferential direction, and the first and second clamping plates are connected by bolts.
[0014] By adopting the above technical solution, the first clamping plate and the second clamping plate are connected by bolts to clamp the arc-shaped circular knife.
[0015] Optionally, the arc-shaped circular cutter has several openings along its upper edge corresponding to the bolt hole positions.
[0016] By adopting the above technical solutions, the opening can avoid bolts, optimize the structure of the arc-shaped round cutter, reduce weight, and improve the structural strength of the cutter.
[0017] Optionally, the inner groove surface of the circumferential groove that mates with the arc-shaped circular cutter is inclined in the same direction as the arc-shaped circular cutter.
[0018] By adopting the above technical solution, the inner groove surface of the circumferential cutting groove is inclined, which can better cooperate with the arc-shaped circular knife to apply shearing force to the paper, improve the smoothness of the paper cutting edge, and avoid burrs.
[0019] Optionally, the outer edge of the clamping disc is provided with a rubber wheel.
[0020] By adopting the above technical solution, the rubber wheel is designed to be flexible and elastic, and can deform to fit the roller surface of the roller body, thus enabling better contact and cooperation with the roller body.
[0021] Optionally, a protective cover is provided around the arc-shaped circular knife on the rotating shaft, with the center of one end of the protective cover engaging with the rotating shaft, and an opening provided at the bottom of the protective cover.
[0022] By adopting the above technical solution, the protective cover is set up around the arc-shaped round knife, which can play a good protective role. The protective cover is snapped together with the rotating shaft, which will not interfere with the arc-shaped round knife. The assembly is simple. The bottom opening of the protective cover exposes the edge of the arc-shaped round knife.
[0023] Optionally, an elastic pressure plate is provided on the rotating shaft between the first clamping plate and the second clamping plate. The outer ring side of the elastic pressure plate abuts against the first clamping plate, and the inner ring side of the elastic pressure plate abuts against the outer ring of the second bearing.
[0024] By adopting the above technical solution, the elastic pressure plate applies external tension between the first clamping plate and the second clamping plate, which is beneficial to the assembly of the first clamping plate and the second clamping plate and improves the assembly quality of the arc-shaped circular cutter.
[0025] Optionally, an annular groove is provided on the end face of the first clamping plate near the second clamping plate, and a protrusion is provided on the end face of the second clamping plate, with the inner ring of the arc-shaped circular knife fitted on the protrusion.
[0026] In summary, this application includes at least the following beneficial effects:
[0027] 1. This application designs the blade as an arc-shaped circular blade. The blade itself has a certain curvature. The arc-shaped circular blade extends into the annular cutting groove of the roller body and cooperates with one inner side of the annular cutting groove. The inner groove surface of the annular cutting groove is inclined, which can better cooperate with the arc-shaped circular blade. Using the rotating shearing principle, the paper is cut. This cutting method produces smooth and burr-free paper edges, improves the paper cutting quality, reduces blade wear, extends service life, and helps save maintenance costs.
[0028] 2. This application achieves the positioning of the first bearing and the second bearing by setting the shaft shoulder and the first retaining ring, and prevents the axial movement of the first bearing and the second bearing; by setting the second retaining ring in the second limiting groove, the axial movement of the first clamping plate can be restricted, ensuring that the first clamping plate can abut against the arc-shaped round knife, and the arc-shaped round knife can apply a thrust to the first clamping plate, ensuring that the second retaining ring abuts against the first bearing; the first clamping plate and the second clamping plate are connected by bolts to clamp the arc-shaped round knife.
[0029] 3. The rubber wheel of this application is flexible and elastic, and can be deformed to fit the roller surface of the roller body, so as to better match the roller body.
[0030] 4. This application provides good protection by setting up a protective cover around the arc-shaped circular knife. Attached Figure Description
[0031] To more clearly illustrate the technical solutions in the embodiments of this utility model or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.
[0032] Figure 1 This is a schematic diagram of an eight-blade slitting machine structure.
[0033] Figure 2 This is a partial structural diagram of an eight-opening slitting blade for a rotary folding machine.
[0034] Figure 3 This is a schematic diagram of an arc-shaped circular knife structure.
[0035] Figure 4 This is a diagram showing the arrangement of the tool holder and the roller.
[0036] Explanation of reference numerals in the attached drawings: 1. Rotating shaft; 2. Shaft shoulder; 3. First limiting groove; 4. First retaining ring; 5. Arc-shaped circular knife; 6. First clamping plate; 7. Second clamping plate; 8. First bearing; 9. Second bearing; 10. Second retaining ring; 11. Roller body; 12. Circumferential cutting groove; 13. Rubber wheel; 14. Protective cover. Detailed Implementation
[0037] 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.
[0038] The following is in conjunction with the appendix Figures 1 to 4 This application will be described in further detail.
[0039] This application discloses an eight-part slitting blade for a rotary page turning machine.
[0040] Reference Figures 1 to 4 An eight-section slitting cutter for a rotary folding machine includes a rotating shaft 1, an arc-shaped circular cutter 5, and a clamping plate.
[0041] A shoulder 2 is provided on the rotating shaft 1, and a first limiting groove 3 is provided on the rotating shaft 1 at both ends of the shoulder 2. A first retaining ring 4 is provided in the first limiting groove 3.
[0042] The arc-shaped circular cutter 5 is mounted on the rotating shaft 1, and the arc-shaped circular cutter 5 is arranged in an arc shape from the center of the shaft to the edge.
[0043] The clamping disc includes a first clamping disc 6 and a second clamping disc 7. A first bearing 8 is mounted on the inner ring of the first clamping disc 6, and the first bearing 8 is mounted on the left end of the shoulder 2 on the rotating shaft 1. The two ends of the inner ring of the first bearing 8 abut against the shoulder 2 and the first retaining ring 4, respectively. The second clamping disc 7 is mounted on the rotating shaft 1 via a second bearing 9. The second bearing 9 is mounted on the inner ring of the second clamping disc 7, and the second bearing 9 is mounted on the right end of the shoulder 2 on the rotating shaft 1. The two ends of the inner ring of the second bearing 9 abut against the shoulder 2 and the first retaining ring 4, respectively. The shoulder 2 and the first retaining ring 4 are used to position the first bearing 8 and the second bearing 9, preventing axial movement of the first bearing 8 and the second bearing 9. An annular groove is provided on the end face of the second clamping disc 7 near the first clamping disc 6, and a protrusion is provided corresponding to the end face of the first clamping disc 6.
[0044] The arc-shaped circular cutter 5 is clamped by the first clamping plate 6 and the second clamping plate 7. The diameter of the arc-shaped circular cutter 5 is larger than that of the clamping plate. The inner ring of the arc-shaped circular cutter 5 is fitted on the protrusion. The arc-shaped circular cutter 5 abuts against the rubber wheel 13 on the first clamping plate 6 and the second clamping plate 7 from the axis to the edge.
[0045] The inner hole of the first clamping plate 6 is provided with a second limiting groove, and a second retaining ring 10 is provided in the second limiting groove to abut against the outer ring of the first bearing 8. By setting the second retaining ring 10 in the second limiting groove, the axial movement of the first clamping plate 6 can be restricted, ensuring that the first clamping plate 6 can abut against the arc-shaped round knife 5. The arc-shaped round knife 5 can apply a pushing force to the first clamping plate 6, ensuring that the second retaining ring 10 abuts against the first bearing 8.
[0046] An elastic pressure plate is provided on the rotating shaft 1 between the first clamping plate 6 and the second clamping plate 7. The outer ring side of the elastic pressure plate abuts against the first clamping plate 1, and the inner ring side of the elastic pressure plate abuts against the outer ring of the second bearing 9. The elastic pressure plate applies external tension between the first clamping plate 6 and the second clamping plate 7, which is beneficial to the assembly of the first clamping plate 6 and the second clamping plate 7 and improves the assembly quality of the arc-shaped circular cutter 5.
[0047] Bolt holes are provided at corresponding positions of the first clamping plate 6 and the second clamping plate 7 along the circumferential direction. Several openings are provided on the upper edge of the arc-shaped circular cutter 5 at the corresponding bolt hole positions. The first clamping plate 6 and the second clamping plate 7 are connected by bolts to clamp the arc-shaped circular cutter 5. The openings can avoid the bolts and can also optimize the structure of the arc-shaped circular cutter 5, reduce weight, and improve the structural strength of the cutter.
[0048] The arc-shaped circular cutter 5 is clamped and fixed by the first clamping plate 6 and the second clamping plate 7, and is rotatably mounted on the rotating shaft 1 through the first bearing 8 and the second bearing 9, thus realizing the installation of the arc-shaped circular cutter 5. This fixing method is stable and reliable.
[0049] A roller body 11 is disposed against the surface of the chuck roller. The centerline of the roller body 11 is not parallel to the centerline of the rotating shaft 1, and there is an angle between them. (Refer to...) Figure 4 The roller body 11 has an annular cutting groove 12. The arc-shaped circular knife 5 is in clearance fit with one inner side of the annular cutting groove 12. The inner groove surface is inclined in the same direction as the arc-shaped circular knife 5. The inclined inner groove surface can better cooperate with the arc-shaped circular knife 5 to apply shearing force to the paper, improve the smoothness of the paper cutting edge, and avoid burrs.
[0050] Rubber wheels 13 are provided on the outer edges of the first clamping plate 6 and the second clamping plate 7. The rubber wheels 13 are flexible and elastic, and can be deformed to fit the roller surface of the roller body 11, so as to better fit with the roller body 11.
[0051] A protective cover 14 is provided around the arc-shaped circular knife 5 on the rotating shaft 1. The protective cover 14, which covers the arc-shaped circular knife 5, provides good protection. The center of one end of the protective cover 14 is snapped into the rotating shaft 1. The bottom opening of the protective cover 14 ensures that the snap-fit connection between the protective cover 14 and the rotating shaft 1 will not interfere with the arc-shaped circular knife 5. The assembly is simple. The bottom opening of the protective cover 14 exposes the edge of the arc-shaped circular knife 5.
[0052] The blade is designed as an arc-shaped circular blade 5, which has a certain curvature. The arc-shaped circular blade 5 extends into the annular cutting groove 12 of the roller body 11 and cooperates with one inner side of the annular cutting groove 12. By using the rotating shearing principle, the paper is cut. This cutting method results in smooth and burr-free paper cutting edges, improves the paper cutting quality, reduces blade wear, extends service life, and helps save maintenance costs.
[0053] In the description of this utility model, it should be understood that the terms "both ends," "left end," "right end," "one end," "bottom," etc., indicating the orientation or positional relationship are based on the orientation or positional relationship shown in the accompanying drawings, and are only for the convenience of describing this utility model 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, and therefore should not be construed as a limitation of this utility model. In the description of this utility model, unless otherwise specified and limited, it should be noted that the term "connection" should be interpreted broadly, for example, it can be a mechanical connection or an electrical connection, or it can be a connection within two components, which can be a direct connection or an indirect connection through an intermediate medium. For those skilled in the art, the specific meaning of the above terms can be understood according to the specific circumstances.
[0054] The above are merely preferred embodiments of the utility model and are not intended to limit the utility model. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the utility model should be included within the protection scope of the utility model.
Claims
1. An eight-section slitting blade for a rotary folding machine, characterized in that, include: A rotating shaft and an arc-shaped circular cutter on the rotating shaft, wherein the arc-shaped circular cutter is clamped by a chuck set on the rotating shaft, the arc-shaped circular cutter is arranged in an arc shape from the axis center to the edge, and the diameter of the arc-shaped circular cutter is larger than that of the chuck; A roller body is provided abutting against the surface of the clamping roller, and an annular cutting groove is provided on the roller body. The arc-shaped circular cutter is in clearance fit with one inner side of the annular cutting groove. The clamping plate includes a first clamping plate and a second clamping plate. The first clamping plate is mounted on the rotating shaft via a first bearing, and the second clamping plate is mounted on the rotating shaft via a second bearing. The arc-shaped circular cutter abuts against the first clamping plate and the second clamping plate sequentially from the axis center to the edge.
2. The eight-section slitting blade of a rotary folding machine according to claim 1, characterized in that, The rotating shaft is provided with a shoulder, and the inner rings of the first bearing and the second bearing at the near end abut against the shoulder. A first limiting groove is provided on the rotating shaft at the far end of the first bearing and the second bearing, and a first retaining ring is provided in the first limiting groove to abut against the first bearing and the second bearing.
3. The eight-opening slitting blade of a rotary folding machine according to claim 2, characterized in that, The inner hole of the first clamping plate is provided with a second limiting groove, and a second retaining ring is provided in the second limiting groove to abut against the outer ring of the first bearing.
4. The eight-section slitting blade of a rotary folding machine according to claim 1, characterized in that, Bolt holes are provided at corresponding positions of the first and second clamping plates along the circumferential direction, and the first and second clamping plates are connected by bolts.
5. The eight-opening slitting blade of a rotary folding machine according to claim 4, characterized in that, The arc-shaped circular knife has several openings along its upper edge corresponding to the bolt holes.
6. The eight-section slitting blade of a rotary folding machine according to claim 1, characterized in that, The inner groove surface of the circumferential groove that mates with the arc-shaped circular cutter is inclined in the same direction as the arc-shaped circular cutter.
7. The eight-section slitting blade of a rotary folding machine according to claim 1, characterized in that, The outer edge of the clamp is provided with a rubber wheel.
8. The eight-section slitting blade of a rotary folding machine according to claim 1, characterized in that, The arc-shaped circular knife on the rotating shaft is covered with a protective cover. The center of one end of the protective cover is engaged with the rotating shaft, and the bottom of the protective cover is open.
9. The eight-section slitting blade of a rotary folding machine according to claim 1, characterized in that, An elastic pressure plate is provided on the rotating shaft between the first clamping plate and the second clamping plate. The outer ring side of the elastic pressure plate abuts against the first clamping plate, and the inner ring side of the elastic pressure plate abuts against the outer ring of the second bearing.
10. The eight-section slitting blade of a rotary folding machine according to claim 1, characterized in that, An annular groove is provided on the end face of the first clamping plate near the end of the second clamping plate, and a protrusion is provided on the end face of the second clamping plate, and the inner ring of the arc-shaped circular knife is fitted on the protrusion.