Plate adjusting and registering device of offset press
By designing the adjustment mechanism of the hydraulic device and the sliding varistor in the offset press, combined with the zero-position recording of the meshing gear and the amperometer, the problem of low axial adjustment efficiency between the offset press units is solved, and rapid adjustment and production efficiency are achieved.
Patent Information
- Application Number
- CN202420986005.5
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-05-07
- Publication Date
- 2024-12-20
- Estimated Expiration
- 2034-05-07
AI Technical Summary
The existing offset printing machines lack effective reference methods in the axial adjustment process between units, resulting in a long adjustment time and affecting production efficiency.
An adjustment mechanism including a hydraulic device, a sliding varistor and a meshing gear is designed. The adjustment plate is driven by a hydraulic device, and the sliding varistor and a meshing gear is combined to realize the axial adjustment of the printing plate roller, and the zero position is recorded through an amp and PLC. to ensure registration between units.
It realizes rapid adjustment between different units of the offset printing machine, reduces adjustment time, improves production efficiency, and reduces equipment installation errors by recording zero points, guiding the adjustment process.
Smart Images
Figure CN222201966U_ABST
Abstract
Description
Technical Field
[0001] The utility model relates to the technical field of printing presses, in particular to a plate adjustment and registration device for an offset printing press. Background Art
[0002] Offset printing is a type of flatbed printing. An offset printing machine is mainly composed of three rollers: a printing plate, a rubber and an impression roller. The image and text on the printing plate are transferred to the substrate with the help of a rubber cloth. One unit of an offset printing machine prints one color, while each unit of a conventional four-color offset printing machine is responsible for one color in CMYK, presenting rich colors through overprinting of the four primary colors.
[0003] The accuracy of four-primary color overprinting is a key factor in ensuring the quality of printed products, that is, different offset printing units must be accurately coordinated to ensure the quality of printed products; the existing plate adjustment and registration device is used to adjust the plate roller circumferentially and axially. The circumferential adjustment can be achieved by adjusting the roller motor; and for the axial adjustment, it is necessary to enable the plate roller to move back and forth in the axial direction. The existing method of using a worm gear driven pull rod lacks a certain reference when adjusting between units during the process, and requires continuous debugging, thereby extending the adjustment time, which is not conducive to improving production efficiency.
[0004] Therefore, a device that can facilitate rapid registration adjustment between different units of an offset printing press during use is a problem that needs to be solved. Utility Model Content
[0005] The utility model aims to provide a plate adjustment and registration device for an offset printing press in view of the above-mentioned deficiencies in the prior art, so as to achieve the purpose of realizing rapid adjustment and registration between different units of the offset printing press.
[0006] To achieve the above-mentioned purpose, the utility model adopts the following technical scheme: a plate adjustment and registration device for an offset printing machine, comprising a frame and a plate roller device, wherein the rotating bearings at both ends of the plate roller device are connected to the frame, the rotating shaft at one end cooperates with a driving mechanism, and the rotating shaft at the other end cooperates with an adjusting mechanism, a hydraulic device is arranged in the adjusting mechanism, the hydraulic device cooperates with the rotating shaft, a connecting rod is connected to the piston rod of the hydraulic device, the connecting rod is connected to a sliding plate of a sliding rheostat, and the sliding rheostat cooperates with the hydraulic device.
[0007] Furthermore, the driving mechanism includes a driving motor, which is connected to a driving gear. A meshing gear is provided on a rotating shaft matched with the driving mechanism, and the meshing gear meshes with the driving gear.
[0008] Furthermore, baffles are respectively provided on both sides of the driving gear.
[0009] Furthermore, the hydraulic device is provided with two and is arranged symmetrically up and down about the rotating shaft. The front end of the piston rod of the hydraulic device is connected to the jacket plate, a matching groove is provided in the jacket plate, and an adjusting plate is fixedly connected to the rotating shaft matching the adjusting mechanism, and the jacket plate is tightly mounted on the adjusting plate through the matching groove.
[0010] Furthermore, the sliding rheostat is connected to an ammeter, and the ammeter and the hydraulic device are respectively connected to a PLC.
[0011] Furthermore, the rotating shafts at both ends of the plate roller device are supported on the frame through supporting devices, and the frame is provided with connecting holes, and bearings are installed through the connecting holes for sliding limit, and the bearings are connected to the rotating shafts.
[0012] Furthermore, a slide groove is provided on the inner side wall of the connecting hole, and a sliding block is provided on the outer ring of the bearing, and the sliding block matches the slide groove.
[0013] Furthermore, installation grooves are provided on both sides of the connection hole, and sealing pieces are installed through the installation grooves.
[0014] Beneficial effects of the utility model:
[0015] 1. Easy and stable adjustment, convenient for use in production;
[0016] 2. By setting the zero point during the adjustment process, the equipment installation error between different units can be effectively determined, so as to provide guidance for the actual adjustment process, facilitate rapid adjustment in production operations, and help improve production efficiency. BRIEF DESCRIPTION OF THE DRAWINGS
[0017] Figure 1 It is a schematic diagram of the structural principle of an existing offset printing machine involved in the utility model;
[0018] Figure 2 It is a schematic diagram of the overall structure of the utility model;
[0019] Figure 3 It is a schematic diagram of the external structure of the receiving device of the utility model;
[0020] Figure 4 It is a schematic diagram of the internal structure of the receiving device of the utility model;
[0021] Figure 5 This is a schematic diagram of the matching structure of the adjustment mechanism and the rotating shaft of the utility model (front view);
[0022] Figure 6 This is a schematic diagram of the matching structure of the adjustment mechanism and the rotating shaft of the utility model (side view)
[0023] Figure 7 yes Figure 2 A partial enlarged schematic diagram of part A.
[0024] The names corresponding to the marks in the figure are:
[0025] 1. Offset printing press; 11. Water roller; 12. Ink roller; 13. Plate roller; 14. Rubber roller; 15. Impression roller; 2. Frame; 21. Connecting hole; 3. Plate roller device; 31. Rotating shaft; 32. Meshing gear; 33. Adjusting plate; 4. Driving mechanism; 41. Driving motor; 42. Driving gear; 421. Baffle; 5. Adjusting mechanism; 51. Hydraulic device; 511. Connecting rod; 52. Jacket plate; 521. Matching groove; 53. Sliding rheostat; 531. Sliding plate; 6. Receiving device; 61. Sealing plate; 62. Mounting groove; 63. Sliding groove; 64. Bearing; 65. Sliding block. DETAILED DESCRIPTION
[0026] The technical solutions in the embodiments of the utility model will be clearly and completely described below in conjunction with the drawings in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, rather than all of the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by ordinary technicians in this field belong to the scope of protection of the utility model.
[0027] Embodiments of the present utility model:
[0028] like Figure 1 As shown, in the embodiment of the utility model, an existing offset printing machine 1 is involved, and the offset printing machine 1 includes a water roller 11 and an ink roller 12. The water roller 11 and the ink roller 12 cooperate with a plate roller 13, the plate roller 13 cooperates with a rubber roller 14, and the rubber roller 14 cooperates with an embossing roller 15.
[0029] like Figure 2-7 As shown, in this embodiment, a frame 2 is provided, and a printing plate roller device 3 is installed through the frame 2. The rotating shafts 31 at both ends of the printing plate roller device 3 are connected to the frame 2 through the receiving device 6, and the rotating shaft 31 on one side is connected to the meshing gear 32, and the meshing gear 32 cooperates with the driving mechanism 4, wherein a driving motor 41 is provided in the driving mechanism 4, and the driving motor 41 cooperates with the driving gear 42, and the driving gear 42 meshes with the meshing gear 32, and baffles 421 are provided on both sides of the driving gear 42.
[0030] The rotating shaft 31 on the other side of the plate roller device 3 cooperates with the adjusting mechanism 5, wherein an adjusting plate 33 is fixedly mounted on the rotating shaft 31, and the adjusting plate 33 cooperates with the adjusting mechanism 5. A hydraulic device 51 is arranged in the adjusting mechanism 5, and there are two hydraulic devices 51, which are arranged symmetrically about the rotating shaft 31. The piston rod of the hydraulic device 51 is connected to the jacket plate 52, and a matching groove 521 is arranged in the jacket plate 52, and the matching groove 521 cooperates with the adjusting plate 33.
[0031] The piston rod of one of the hydraulic devices 51 is connected to the connecting rod 511 , the connecting rod 511 is connected to the sliding piece 531 of the sliding rheostat 53 , the sliding rheostat 53 is connected to the ammeter, and the ammeter and the hydraulic device 51 are respectively connected to the PLC.
[0032] A connecting hole 21 is provided at the matching position between the frame 2 and the rotating shaft 31, and mounting grooves 62 are provided on both sides of the connecting hole 21. A bearing 64 is installed in the connecting hole 21, wherein a slide groove 63 is opened in the connecting hole 21, and a slider 65 is provided on the bearing 64. The slider 65 matches the slide groove 63, and a sealing piece 61 is installed through the mounting groove 62.
[0033] The principle of this utility model is:
[0034] When the utility model is in use, the driving mechanism 4 drives the printing plate roller device 3 to rotate, thereby realizing the printing of the product. In this process, the offset printing machine 1 is involved. The offset printing machine 1 is an existing one. The structural principle is as follows Figure 1 As shown, it is not difficult for those skilled in the art to understand, and will not be described in detail here.
[0035] When the plate roller device 3 needs to be adjusted axially, the hydraulic device 51 is controlled to operate during the process, and the hydraulic device 51 drives the adjustment plate 33 through the jacket plate 52, thereby adjusting the position of the plate roller device 3. During this process, the receiving device 6 moves in the connecting hole 21, and the meshing gear 32 and the driving gear 42 can also undergo relative displacement, thereby ensuring stability in use.
[0036] In the process of multiple units cooperating with each other, the zero position during the adjustment process can be determined by sliding the rheostat 53, as shown in the attached Figure 7When the sliding rheostat 53 is connected to the position, when the current reaches the maximum, the position at this time is recorded as the zero position, and then with the adjustment, the current gradually decreases until it reaches a certain position, keeping the unit unchanged, so when another unit is adjusted on this basis, the adjustment can also be started from the zero position. When another position is reached, the two units have achieved registration; then in actual production, the difference in current display between the two will basically remain unchanged, that is, after changing one unit, such as maintenance and repair, during actual adjustment, the other unit can be quickly adjusted according to the recorded difference, thereby making the adjustment efficiency in actual production higher, which helps to improve production efficiency.
Claims
1. A plate adjustment and registration device for an offset printing press, comprising a frame (2) and a plate roller device (3), characterized in that: The rotating shafts (31) at both ends of the printing plate roller device (3) are supported on the frame (2); the rotating shaft (31) at one end cooperates with the driving mechanism (4); the rotating shaft (31) at the other end cooperates with the adjusting mechanism (5); a hydraulic device (51) is arranged in the adjusting mechanism (5); the hydraulic device (51) cooperates with the rotating shaft (31); a connecting rod (511) is connected to the piston rod of the hydraulic device (51); the connecting rod (511) is connected to a sliding plate (531) of a sliding rheostat (53); and the sliding rheostat (53) cooperates with the hydraulic device (51).
2. The offset printing press plate adjustment and registration device according to claim 1, characterized in that: The driving mechanism (4) comprises a driving motor (41), the driving motor (41) is connected to a driving gear (42), a meshing gear (32) is arranged on a rotating shaft (31) matched with the driving mechanism (4), and the meshing gear (32) meshes with the driving gear (42).
3. The offset printing press plate adjustment and registration device according to claim 2, characterized in that: Baffles (421) are respectively provided on both sides of the driving gear (42).
4. The offset printing press plate adjustment and registration device according to claim 1, characterized in that: The hydraulic device (51) is provided with two and is symmetrically arranged about the rotating shaft (31) in the upper and lower directions. The front end of the piston rod of the hydraulic device (51) is connected to the jacket plate (52). A matching groove (521) is provided in the jacket plate (52). An adjusting plate (33) is fixedly connected to the rotating shaft (31) matched with the adjusting mechanism (5). The jacket plate (52) is tightly sleeved on the adjusting plate (33) through the matching groove (521).
5. The offset printing press plate adjustment and registration device according to claim 4, characterized in that: The sliding rheostat (53) is connected to an ammeter, and the ammeter and the hydraulic device (51) are respectively connected to a PLC.
6. The offset printing press plate adjustment and registration device according to claim 1, characterized in that: The rotating shafts (31) at both ends of the printing plate roller device (3) are supported on the frame (2) through a supporting device (6); a connecting hole (21) is provided on the frame (2); a bearing (64) is installed through the connecting hole (21) in a sliding manner; and the bearing (64) is connected to the rotating shaft (31).
7. The plate adjustment and registration device for an offset printing press according to claim 6, characterized in that: A slide groove (63) is provided on the inner side wall of the connecting hole (21), and a slider (65) is provided on the outer ring of the bearing (64), and the slider (65) matches the slide groove (63).
8. The offset printing press plate adjustment and registration device according to claim 6, characterized in that: Mounting grooves (62) are provided on both sides of the connection hole (21), and sealing plates (61) are mounted through the mounting grooves (62).