Paper printing processing equipment
By setting consistent side pull-gauge limits in the paper printing processing equipment, the problem of degradation of registration accuracy due to edge slope during paper printing is solved, and the product pass rate is improved.
Patent Information
- Application Number
- CN202421786251.2
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-07-26
- Publication Date
- 2025-04-22
- Estimated Expiration
- 2034-07-26
AI Technical Summary
During the paper printing process, it is difficult to maintain an absolute 90-degree angle on the edge of the cut paper, resulting in a slope on the paper, thereby reducing the registration accuracy and improving the failure rate.
A paper printing processing equipment is designed, including a cutting machine, an offset printer and a downstream processing device. By providing the limiting parts in the side pull gauge of the offset press and downstream processing device and ensuring their position is consistent, avoiding the impact of paper slope on overprinting.
By ensuring that the position of the side pulling limits of the offset printing press and downstream processing device is consistent, the problem of degradation of registration accuracy caused by paper slope is solved, and the product pass rate is improved.
Smart Images
Figure CN222780142U_ABST
Abstract
Description
Technical Field
[0001] The utility model relates to the technical field of printing, in particular to a paper printing processing device. Background Art
[0002] Before sheet-fed printing, the paper generally needs to be trimmed and cut into specific sizes, which requires cutting the four sides of the paper. However, during the trimming process, it is difficult to ensure that the angles of the four sides of the paper are absolutely 90 degrees, which means that the paper will appear slanted.
[0003] If the paper is skewed, the registration accuracy will decrease during the subsequent processing, thereby increasing the product rejection rate.
[0004] It should be noted that the statements in this background technology section only provide background technology related to the present invention and do not necessarily constitute prior art. Utility Model Content
[0005] The utility model provides a paper printing processing device to improve the qualified rate of products.
[0006] The utility model provides a paper printing processing device, comprising:
[0007] A cutting machine, used for cutting the base paper to obtain the paper to be processed;
[0008] An offset printing press, arranged downstream of the cutting machine to receive the paper to be processed and print images and texts on the paper to be processed, the offset printing press comprising an offset printing press body, a first front gauge for positioning the front end of the paper to be processed, and a first side gauge for positioning the side edge of the paper to be processed, the first side gauge comprising a first limiting member, the first limiting member abutting against the side edge of the paper to be processed to limit the side edge of the paper to be processed; and
[0009] A downstream processing device is arranged downstream of the offset printing press to continue processing the paper to be processed after offset printing by the offset printing press, the downstream processing device comprises a second front gauge for positioning the front end of the paper to be processed and a second side gauge for positioning the side edge of the paper to be processed, the second side gauge comprises a second limiting member, the second limiting member abuts against the side edge of the paper to be processed to limit the side edge of the paper to be processed;
[0010] The distance between the first limiting member and the first front gauge in the front-to-back direction is equal to the distance between the second limiting member and the second front gauge in the front-to-back direction.
[0011] In some embodiments, the downstream processing device includes a die cutter.
[0012] In some embodiments, the second side pull gauge includes a pull gauge body, the paper printing processing equipment further includes a connecting frame arranged on the pull gauge body, and the second limiting member is arranged on the connecting frame.
[0013] In some embodiments, the connecting frame includes a connecting rod, the length direction of the connecting rod is consistent with the conveying direction of the paper to be processed, and the second limiter is connected to the front end of the connecting rod so that the position of the second limiter relative to the pull gauge body is closer to the second front gauge.
[0014] In some embodiments, the connecting frame further comprises a bottom plate connected to the pull gauge body, the bottom plate is vertically arranged relative to the connecting rod, and the connecting rod is connected to the bottom plate.
[0015] In some embodiments, the connecting frame further includes reinforcing ribs, and the reinforcing ribs connect the connecting rod and the bottom plate.
[0016] In some embodiments, the reinforcing ribs are welded to the connecting rods and the bottom plate.
[0017] In some embodiments, a long hole is provided on the bottom plate, the length direction of the long hole is perpendicular to the conveying direction of the paper, and the bottom plate is connected to the drawing gauge body through the long hole so that the position of the bottom plate can be adjusted.
[0018] In some embodiments, the bottom plate is provided with two long holes spaced apart in the length direction of the long holes.
[0019] In some embodiments, the second limiting member includes a baffle.
[0020] In some embodiments, the paper printing processing equipment includes a paper packaging printing press.
[0021] Based on the technical solution provided by the utility model, a paper printing and processing device includes a cutting machine, an offset printing machine and a downstream processing device. The cutting machine is used to cut the base paper to obtain the paper to be processed. The offset printing machine is arranged downstream of the cutting machine to receive the paper to be processed and print the image and text on the paper to be processed. The offset printing machine includes an offset printing machine body, a first front gauge for positioning the front end of the paper to be processed, and a first side gauge for positioning the side of the paper to be processed. The first side gauge includes a first limiting member. The first limiting member abuts against the side of the paper to be processed to limit the side of the paper to be processed. The downstream processing device is arranged downstream of the offset printing machine to continue processing the paper to be processed after offset printing by the offset printing machine. The downstream processing device includes a second front gauge for positioning the front end of the paper to be processed and a second side gauge for positioning the side of the paper to be processed. The second side gauge includes a second limiting member. The second limiting member abuts against the side of the paper to be processed to limit the side of the paper to be processed. The distance between the first stopper and the first front gauge in the front-to-back direction is equal to the distance between the second stopper and the second front gauge in the front-to-back direction. The paper printing processing equipment of the embodiment of the utility model sets the position of the second stopper of the second side gauge of the downstream processing equipment downstream of the offset printing press to be consistent with the position of the first stopper of the offset printing press, thereby avoiding the problem of reduced registration accuracy due to the slope of the edge of the cut paper to be processed, thereby improving the qualified rate of the product.
[0022] Other features and advantages of the present invention will become apparent from the following detailed description of exemplary embodiments of the present invention with reference to the accompanying drawings. BRIEF DESCRIPTION OF THE DRAWINGS
[0023] The drawings described herein are used to provide a further understanding of the present invention and constitute a part of the present application. The exemplary embodiments of the present invention and their descriptions are used to explain the present invention and do not constitute an improper limitation on the present invention. In the drawings:
[0024] Figure 1 The figure is a schematic diagram of the positioning points of the side pull gauge of the offset printing machine and the die-cutting machine in the related art.
[0025] Figure 2 It is a schematic structural diagram of paper printing processing equipment in some embodiments of the utility model.
[0026] Figure 3 for Figure 2 The schematic diagram of the structure of the die-cutting machine of the paper printing processing equipment shown is a top view.
[0027] Figure 4 for Figure 3 The schematic diagram of the structure of the connecting frame of the die-cutting machine is shown.
[0028] Figure 5 for Figure 4 A schematic structural diagram of the bottom plate of the connecting frame shown. DETAILED DESCRIPTION
[0029] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. The following description of at least one exemplary embodiment is actually only illustrative and is by no means a limitation on the utility model and its application or use. Based on the embodiments in the utility model, all other embodiments obtained by ordinary technicians in this field without making creative work are within the scope of protection of the utility model.
[0030] Unless otherwise specifically stated, the relative arrangement, numerical expressions and numerical values of the parts and steps set forth in these embodiments do not limit the scope of the utility model. At the same time, it should be understood that, for ease of description, the sizes of the various parts shown in the accompanying drawings are not drawn according to the actual proportional relationship. The technology, methods and equipment known to those of ordinary skill in the relevant art may not be discussed in detail, but in appropriate cases, the technology, methods and equipment should be considered as a part of the specification. In all examples shown and discussed here, any specific value should be interpreted as being merely exemplary, rather than as a limitation. Therefore, other examples of exemplary embodiments may have different values. It should be noted that similar reference numerals and letters represent similar items in the following drawings, and therefore, once a certain item is defined in an accompanying drawing, it does not need to be further discussed in subsequent drawings.
[0031] For ease of description, spatially relative terms such as "above", "above", "on the upper surface of", "above", etc. may be used here to describe the spatial positional relationship between a device or feature and other devices or features as shown in the figure. It should be understood that spatially relative terms are intended to include different orientations of the device in use or operation in addition to the orientation described in the figure. For example, if the device in the accompanying drawings is inverted, the device described as "above other devices or structures" or "above other devices or structures" will be positioned as "below other devices or structures" or "below other devices or structures". Thus, the exemplary term "above" may include both "above" and "below". The device may also be positioned in other different ways, and the spatially relative descriptions used here are interpreted accordingly.
[0032] After cutting and trimming the paper, the paper needs to be printed by an offset printing machine, and after printing, die-cutting or other processing procedures are required. Among them, die-cutting refers to pressing and cutting the printed paper into individual graphic products. The working principle of the die-cutting machine is to use a die-cutting knife, a steel knife, a mold, etc. to apply a certain pressure through the stamping plate to roll and cut the printed product or cardboard into a certain shape. The working principle of the fully automatic flat-bed die-cutting machine is that the paper feeder feeds the paper into the front gauge and the side pull gauge for positioning through the paper feeding component, and then the tooth bar sends the paper to the die-cutting mechanism for secondary positioning and die-cutting. After die-cutting, the tooth bar sends it to the waste removal mechanism, and after waste removal, it enters the paper collection department to complete the die-cutting operation. The side pull gauge is a separate component of the die-cutting machine, and its function is to control the positioning of the printed paper so that the die-cutting machine can cut out paper that meets the technical requirements.
[0033] Before sheet-fed printing, the paper generally needs to be trimmed. Specifically, the base paper is cut into a specific size, which requires trimming the four sides of the base paper. However, it is difficult to ensure that the angles of the four sides of the paper are absolutely 90 degrees during the trimming process, which will lead to the problem of paper tilt.
[0034] In the related art, the positioning points of the side-pulling gauges in different processes during the printing process are different. If the paper has a slope, it will lead to inconsistent positioning of the paper between the equipment in different processes, which will lead to a decrease in registration accuracy, resulting in a high scrap rate.
[0035] like Figure 1 As shown, the inventor of the utility model found during the research that the inconsistent positioning between the equipment in different processes will lead to a decrease in the registration accuracy. Figure 1 The technical problem is explained in detail.
[0036] like Figure 1 As shown, ∠ABC is the paper inclination, point D is the side pull specified position of the offset printing machine, point E is the side pull specified position of the die-cutting machine, and AC is the vertical line of the bottom line 61 of the paper 6 to be processed. Point F is the mapping point of point E on the vertical line AC. Point G is the mapping point of point D on the vertical line. AG The distance between the side pull point of the offset printing machine and the bottom line 61. AF It is the distance between the side pull setting point of the die-cutting machine and the bottom line 61. If the paper has a larger slope, the difference in the side pull setting point will lead to the left and right deviations in each production process after offset printing. AF -L AG )*sin∠ABC.
[0037] Due to L AG and L AF is fixed, then L AF -L AGIt is a fixed value, so the size of △S depends on the size of ∠ABC. If ∠ABC is too large, the left and right deviations △S will exceed the process deviation standard, resulting in unqualified products.
[0038] In view of the above findings, an embodiment of the utility model proposes to set the position of the limit piece of the side pull gauge of the downstream processing device downstream of the offset printing press to be consistent with the position of the limit piece of the side pull gauge of the offset printing press, thereby avoiding the influence of the paper inclination on the overprinting and improving the product qualification rate.
[0039] Reference below Figures 2 to 4 The structure of the paper printing processing device in the embodiment of the utility model is described in detail.
[0040] like Figure 2 As shown, the paper printing and processing equipment of some embodiments of the utility model includes a cutter 300, an offset printing press 200 and a downstream processing device. The cutter 300 is used to cut the base paper to obtain the paper to be processed. The offset printing press 200 is arranged downstream of the cutter 300 to receive the paper to be processed and print images and texts on the paper to be processed. The offset printing press 200 includes an offset printing press body, a first front gauge for positioning the front end of the paper to be processed, and a first side pull gauge for positioning the side edge of the paper to be processed. The first side pull gauge includes a first limit member. The first limit member abuts against the side edge of the paper to be processed to limit the side edge of the paper to be processed. The downstream processing device is arranged downstream of the offset printing press 200 to continue processing the paper to be processed after offset printing by the offset printing press 200. Reference Figure 3 The downstream processing device includes a second front gauge 2 for positioning the front end of the paper to be processed and a second side gauge 4 for positioning the side edge of the paper to be processed. The second side gauge 4 includes a second stopper 41. The second stopper 41 abuts against the side edge of the paper to be processed to limit the side edge of the paper to be processed. The distance between the first stopper and the first front gauge in the front-to-back direction is equal to the distance between the second stopper 41 and the second front gauge 2 in the front-to-back direction.
[0041] The paper printing processing equipment of the embodiment of the utility model sets the position of the second limit member 41 of the second side pull gauge of the downstream processing equipment downstream of the offset printing machine 200 to be consistent with the position of the first limit member of the offset printing machine 200, specifically, to be equal to the distance between the bottom edges of the paper to be processed, thereby avoiding the problem of reduced registration accuracy due to the slope of the edge of the paper to be processed obtained by cutting, thereby improving the product qualification rate.
[0042] In some embodiments, the downstream processing device includes a hot stamping machine.
[0043] In some embodiments, the downstream processing device includes a die cutter 100. Figure 2The paper printing and processing equipment includes a cutting machine 300, an offset printing machine 200 and a die-cutter 100 which are sequentially arranged in the conveying direction of the paper. The position of the second stopper 41 of the die-cutter 100 of the embodiment of the utility model is arranged to be consistent with the position of the first stopper of the offset printing machine 200, so that when die-cutting is performed on the paper to be processed after the offset printing is completed, the registration accuracy between the die-cut product and the offset printing image is improved.
[0044] Here, the consistency of the position of the second limit member 41 of the die-cutting machine 100 and the first limit member of the offset printing machine 200 means that the distance between the second limit member 41 and the second front gauge is equal to the distance between the first limit member and the first front gauge. In other words, the consistency of position means that the relative positions are the same. The first front gauge is used on the offset printing machine to position the front end of the paper to be processed, and the second front gauge is used on the die-cutting machine to position the front end of the paper to be processed. Therefore, the above distances are set to be equal, so that the distance from the limit member of the side pull gauge of the offset printing machine to the bottom edge of the front end of the paper to be processed is equal to the distance from the limit member of the side pull gauge of the die-cutting machine to the bottom edge of the front end of the paper to be processed, thereby effectively avoiding the problem of large registration deviation caused by the inclination of the paper.
[0045] In the description of the embodiment of the present utility model, the front end refers to the end of the paper to be processed in the conveying direction X. The front in the conveying direction is the front, and the side refers to the left and right sides of the paper to be processed.
[0046] Figure 3 The schematic diagram of the top view of the die cutting machine 100 of the embodiment of the utility model is shown. Figure 3 The positioning process of the die-cutting machine 100 for the paper to be processed is described in detail. The positioning structure and positioning process of the offset printing machine can refer to the die-cutting machine 100, and will not be repeated here. Moreover, the positioning structure and positioning process of the offset printing machine can refer to the structure of a conventional offset printing machine in the prior art, and the embodiment of the utility model does not improve the positioning of the offset printing machine.
[0047] like Figure 3 As shown, the die-cutting machine 100 includes a tooth row 1, a second front gauge 2 and a second side gauge 4. Among them, the second front gauge 2 includes a front gauge baffle. The paper 6 to be processed is conveyed forward along the conveying direction X. When its front end abuts against the front gauge baffle, its conveying stops and the positioning in the front-back direction X is achieved. At this time, the second side gauge 4 is used to position the paper 6 to be processed in the left and right directions Y. The specific process is that the side gauge body 42 on the second side gauge 4 pulls the paper 6 to be processed outward and the side of the paper 6 to be processed abuts against the second limiter 41 to achieve the positioning of the paper 6 to be processed in the left and right directions Y.
[0048] The side pull gauge body 42 includes a roller for pulling the paper 6 to be processed.
[0049] As can be seen from the above description, the embodiment of the utility model sets the position of the second limit member 41 of the second side gauge 4 of the die-cutting machine 100 to be consistent with the position of the first limit member of the first side gauge of the offset printing machine. In order to achieve the above purpose, in some embodiments, the second side gauge 4 includes a gauge body 42. The paper printing processing equipment also includes a connecting frame 3 arranged on the gauge body 42. The second limit member 41 is arranged on the connecting frame 3. The embodiment of the utility model realizes the change of the position of the limit member of the second side gauge by adding a connecting frame 3 to the gauge body 42 and arranging the second limit member 41 on the connecting frame 3, without making major changes to the structure of the second side gauge, so the cost is relatively low.
[0050] In some embodiments, the connecting frame 3 is detachably connected to the pull gauge body 42 , thereby further improving the convenience of disassembly and assembly of the connecting frame 3 .
[0051] refer to Figure 3 and Figure 4 In some embodiments, the connecting frame 3 includes a connecting rod 32. The length direction of the connecting rod 32 is consistent with the conveying direction X of the paper to be processed. The second stopper 41 is connected to the front end of the connecting rod 32 so that the position of the second stopper 41 relative to the gauge body 42 is closer to the second front gauge 2. The connecting rod 32 of this embodiment extends in the conveying direction X and extends forward from the gauge body 42, thereby being closer to the front bottom edge of the paper to be processed, so as to achieve consistency with the position of the first stopper of the offset printing press.
[0052] like Figure 4 As shown, in some embodiments, the connecting frame 3 further includes a bottom plate 33 connected to the drawing gauge body 42. The bottom plate 33 is vertically arranged relative to the connecting rod 32. The connecting rod 32 is connected to the bottom plate 33. The bottom plate 33 is connected to the drawing gauge body 42, and the connecting rod 32 is vertically connected to the bottom plate 33, thereby forming a right triangle structure.
[0053] In some embodiments, Figure 4 As shown, the connecting frame 3 further includes a reinforcing rib 34. The reinforcing rib 34 connects the connecting rod 32 and the bottom plate 33. The reinforcing rib 34 is a triangular structure, which is connected between the connecting rod 32 and the bottom plate 33 to improve the strength of the connecting frame 3, and is used to prevent shaking and deformation when the second limiting member 41 contacts and abuts against the side of the paper to be processed.
[0054] In some embodiments, the reinforcing ribs 34 are welded to the connecting rods 32 and the bottom plate 33. The structural strength of the connecting frame can be further enhanced by welding.
[0055] like Figure 5As shown, in some embodiments, a long hole 331 is provided on the bottom plate 33. The length direction of the long hole 331 is perpendicular to the conveying direction of the paper, and the bottom plate 33 is connected to the gauge body 42 through the long hole 331 so that the installation position of the bottom plate 33 can be adjusted. For example, the bottom plate 33 is connected to the gauge body 42 through a connecting piece inserted in the long hole 331, so that the position of the bottom plate 33 relative to the gauge body 42 can be adjusted by adjusting the position of the connecting piece in the long hole 331. This can be applied to different die-cutting machines.
[0056] In some embodiments, the bottom plate 33 is provided with two long holes 331 spaced apart in the length direction of the long hole 331. This can increase the range of position adjustment and improve the flexibility of position adjustment.
[0057] In some embodiments, the second limiting member 41 comprises a baffle plate, which is a flat plate that abuts against the side edge of the paper to be processed to play a limiting role.
[0058] In some embodiments, the paper printing processing equipment includes a paper packaging printing press.
[0059] The paper printing processing equipment of the embodiment of the utility model solves the problem of inaccurate registration caused by the inconsistency of the side pull specified positions between the offset printing machine and the die-cutting machine, effectively improving the registration accuracy of the company's products, improving product quality and customer satisfaction. Moreover, the die-cutting machine of the embodiment of the utility model only uses a connecting frame to achieve the change of the positioning point, without the need to redesign or replace the original die-cutting machine side pull gauge, which greatly reduces the cost.
[0060] Due to the existence of paper inclination, the related art requires staff to classify the paper into multiple levels according to the different paper inclinations, which is time-consuming and laborious, and there will be mistakes in manual work, such as selecting paper with a larger inclination. If the above selection operation is not performed, the machine needs to be adjusted frequently, the operation efficiency is low, and the product quality cannot be guaranteed. The paper printing processing equipment of the embodiment of the utility model reduces the number and time of machine adjustment by the machine operator, greatly improves the effective operation rate of the machine, and reduces the labor intensity of the machine staff.
[0061] Finally, it should be noted that the above embodiments are only used to illustrate the technical solution of the utility model rather than to limit it. Although the utility model has been described in detail with reference to the preferred embodiments, ordinary technicians in the relevant field should understand that the specific implementation methods of the utility model can still be modified or some technical features can be replaced by equivalents without departing from the spirit of the technical solution of the utility model, which should be included in the scope of the technical solution for protection of the utility model.
Claims
1. A paper printing processing device, characterized in that: include: A cutting machine (300), used for cutting base paper to obtain paper to be processed; An offset printing machine (200) is arranged downstream of the cutting machine (300) to receive the paper to be processed and print images and texts on the paper to be processed, the offset printing machine (200) comprising an offset printing machine body, a first front gauge for positioning the front end of the paper to be processed, and a first side gauge for positioning the side edge of the paper to be processed, the first side gauge comprising a first limiting member, the first limiting member abutting against the side edge of the paper to be processed to limit the side edge of the paper to be processed; and A downstream processing device, arranged downstream of the offset printing machine (200) to continue processing the paper to be processed after offset printing by the offset printing machine (200), the downstream processing device comprising a second front gauge (2) for positioning the front end of the paper to be processed and a second side gauge (4) for positioning the side edge of the paper to be processed, the second side gauge (4) comprising a second limiting member (41), the second limiting member (41) abutting against the side edge of the paper to be processed to limit the side edge of the paper to be processed; The distance between the first limiting member and the first front gauge in the front-to-back direction is equal to the distance between the second limiting member (41) and the second front gauge in the front-to-back direction.
2. The paper printing processing equipment according to claim 1, characterized in that: The downstream processing device includes a die cutter (100).
3. The paper printing processing equipment according to claim 1, characterized in that: The second side drawing gauge (4) comprises a drawing gauge body (42), the paper printing processing equipment further comprises a connecting frame (3) arranged on the drawing gauge body (42), and the second limiting member (41) is arranged on the connecting frame (3).
4. The paper printing processing equipment according to claim 3, characterized in that: The connecting frame (3) comprises a connecting rod (32), the length direction of the connecting rod (32) is consistent with the conveying direction (X) of the paper to be processed, and the second limiting member (41) is connected to the front end of the connecting rod (32) so that the position of the second limiting member (41) relative to the drawing gauge body (42) is closer to the second front gauge.
5. The paper printing processing equipment according to claim 4, characterized in that: The connecting frame (3) further comprises a bottom plate (33) connected to the drawing gauge body (42); the bottom plate (33) is vertically arranged relative to the connecting rod (32); and the connecting rod (32) is connected to the bottom plate (33).
6. The paper printing processing equipment according to claim 5, characterized in that: The connecting frame (3) further comprises a reinforcing rib (34), wherein the reinforcing rib (34) connects the connecting rod (32) and the bottom plate (33).
7. The paper printing processing equipment according to claim 6, characterized in that: The reinforcing rib (34) is welded to the connecting rod (32) and the bottom plate (33).
8. The paper printing processing equipment according to claim 5, characterized in that: The bottom plate (33) is provided with a long hole, the length direction of which is perpendicular to the conveying direction of the paper, and the bottom plate (33) is connected to the drawing gauge body (42) through the long hole so that the position of the bottom plate (33) can be adjusted.
9. The paper printing processing equipment according to claim 8, characterized in that: The bottom plate (33) is provided with two long holes spaced apart in the length direction of the long hole.
10. The paper printing processing equipment according to any one of claims 1 to 9, characterized in that: The second limiting member (41) comprises a baffle.
11. The paper printing processing equipment according to any one of claims 1 to 9, characterized in that: The paper printing processing equipment comprises a paper packaging printing press.