Offset printing plate bending machine

Abstract

The offset printing plate bending machine comprises an operation box, supporting rods are fixedly connected to the four corners of the top of the operation box respectively, a top plate is fixedly connected to the tops of the supporting rods, a hydraulic cylinder is fixedly connected to the middle of the top side of the top plate, and the movable end of the hydraulic cylinder penetrates through the bottom side of the top plate and is fixedly connected with a punching head. Placing bases are symmetrically connected to the top of the operation box, supporting bases are arranged on the placing bases in a supporting mode, first arc-shaped grooves are formed in the opposite sides of the placing bases in a digging mode, when a semicircular punching block is abraded, the semicircular punching block can be conveniently replaced, the semicircular punching block with the adaptive size can be replaced according to the width of a printing plate, and practicability is greatly improved. According to the printing plate bending device, the placing and supporting width of the placing base can be flexibly adjusted according to the size of a printing plate, the printing plate bending device is suitable for bending operation of printing plates of different sizes, the printing plate bending application range is further widened, the bending operation stability is improved, and material taking operation is more convenient.

Description

Technical Field

[0001] The utility model relates to the technical field of bending plate machines, and specifically, to an offset bending plate machine. Background Art

[0002] For drum printing, the printing plate needs to be pre-punched and pre-bent in advance, and then hung on the printing machine drum. As the drum rotates, the printing plate rolls along the outer circumference of the drum to complete one printing. For color plate printing, multiple printing plates of the same layout are required, and each printing plate needs to ensure that its position is exactly the same during the printing process. Therefore, the punching and bending of the printing plate need to be accurate to achieve accurate positioning.

[0003] In the prior art, the application number 202322063017.9 discloses a high-speed and high-precision offset bending plate machine, which includes a base. An installation plate is slidably installed on the inner bottom surface of the base. At both ends of the upper surface of the installation plate, placing seats are installed. At the middle of the upper surface of the installation plate, two end positioning plates are provided corresponding to the placing seats. At both ends on both sides of the placing seats, side positioning plates are provided. In the middle of the interior of the placing seat, a double-shaft motor is installed, and the output ends of the double-shaft motor are both connected with threaded rods. The above device can only perform bending operations on the two side edges of the printing plate, and the bending requirements cannot meet different users. The bending can only be carried out through rollers, and the worn rollers cannot be replaced. Moreover, the placing seat will limit the length of the printing plate, and when encountering large-size printing plates, effective bending operations cannot be carried out, greatly reducing the applicable range of the bending work.

[0004] In view of the problems in the related art, no effective solution has been proposed yet. Summary of the Utility Model

[0005] In view of the problems in the related art, the present utility model provides an offset bending plate machine to overcome the above technical problems existing in the prior related art.

[0006] Therefore, the specific technical solution adopted by the present utility model is as follows:

[0007] An offset bending plate machine includes an operation box. At the four corners of the top of the operation box, support rods are respectively fixedly connected. At the top of the support rods, a top plate is fixedly connected. In the middle of the top side of the top plate, a hydraulic cylinder is fixedly connected. The movable end of the hydraulic cylinder penetrates the bottom side of the top plate and is fixedly connected with a punching head. The top of the operation box is symmetrically connected with placing seats. A support seat is provided on the placing seats. First arc-shaped grooves are respectively dug on the opposite sides of the placing seats.

[0008] Preferably, the punching head includes an assembly groove plate, a semi-circular punching block, and a connecting protrusion. The connecting protrusion is arranged in the middle of the top side of the semi-circular punching block, and the semi-circular punching block is slidably connected inside the assembly groove plate. The movable end of the hydraulic cylinder is fixedly connected with the middle of the top side of the assembly groove plate.

[0009] Preferably, bolt holes are equidistantly and throughly provided on both sides of the outer wall of the assembly groove plate and both sides of the outer wall of the connecting protrusion, and the assembly groove plate is threadedly connected with positioning bolts through the bolt holes, and is connected throughly and matchingly with the threaded holes on both sides of the outer wall of the connecting protrusion through the positioning bolts.

[0010] Preferably, synchronous motors are respectively fixedly connected to the left and right sides of the operation box. Installation grooves are symmetrically dug in the middle of the top side of the operation box. Threaded rods are provided inside the installation grooves, and guide rods are symmetrically provided on both sides of the threaded rods.

[0011] Preferably, the inner end of the threaded rod is connected to the inner wall of the installation groove through a bearing. The output shaft of the synchronous motor extends into the installation groove, and the output shaft of the synchronous motor is fixedly connected to the outer end of the threaded rod.

[0012] Preferably, moving blocks are sleeved on the outer sides of the threaded rod and the guide rod. The top sides of the moving blocks are fixedly connected to the bottom of the placing seat. Nuts are throughly provided inside the moving blocks through bearings, and are respectively threadedly connected with the threaded rod through the nuts.

[0013] Preferably, a movable through port is throughly provided in the middle of the top side of the operation box. The support seat is arranged inside the movable through port and is movably connected to the inside of the movable through port. A second arc-shaped groove is dug on the top side of the support seat, and chamfers are provided above the inner wall of the first arc-shaped groove.

[0014] Preferably, a telescopic cylinder is provided on the bottom side of the support seat. The bottom side of the telescopic cylinder is fixedly connected to the bottom side of the inner wall of the operation box, and the movable end of the telescopic cylinder is fixedly connected to the middle of the bottom side of the support seat.

[0015] The beneficial effects of the present utility model are as follows: when the semi-circular punch is worn, it can be conveniently replaced, and semi-circular punches with adapted sizes can be replaced according to the width of the printing plate, greatly improving the practicability. The width of the placing seat for placing and supporting can be flexibly adjusted according to the size of the printing plate, which is applicable to the bending operation of printing plates with different sizes, further improving the applicable range of the printing plate bending, enhancing the stability of the bending operation, and making the material taking operation more convenient. Description of the Drawings

[0016] In order to more clearly illustrate the technical solutions in the embodiments of the present utility model or the prior art, the following will briefly introduce the drawings required in the embodiments. Obviously, the drawings in the following description are only some embodiments of the present utility model. For those of ordinary skill in the art, other drawings can be obtained based on these drawings without creative efforts.

[0017] Figure 1It is a schematic diagram of the overall structure of an offset printing bending machine according to an embodiment of the present utility model;

[0018] Figure 2 It is a schematic diagram of the appearance structure of a punching head of an offset printing bending machine according to an embodiment of the present utility model;

[0019] Figure 3 It is a schematic diagram of the top structure of an operation box of an offset printing bending machine according to an embodiment of the present utility model;

[0020] Figure 4 It is a schematic diagram of the bottom structure of a support base of an offset printing bending machine according to an embodiment of the present utility model.

[0021] In the figure:

[0022] 1. Operation box; 2. Support rod; 3. Top plate; 4. Hydraulic cylinder; 5. Placing seat; 6. Punching head; 7. Support base; 8. First arc groove; 9. Assembly groove plate; 10. Semi-circular punch; 11. Connecting protrusion; 12. Positioning bolt; 13. Synchronous motor; 14. Installation groove; 15. Threaded rod; 16. Guide rod; 17. Moving block; 18. Activity through hole; 20. Telescopic cylinder, 21. Second arc groove. Detailed implementation manners

[0023] To further illustrate each embodiment, the present utility model provides accompanying drawings. These drawings are a part of the disclosure of the present utility model, mainly used to illustrate the embodiments, and can be combined with the relevant descriptions in the specification to explain the operation principle of the embodiments. With reference to these contents, those of ordinary skill in the art should be able to understand other possible implementation manners and the advantages of the present utility model. The components in the figures are not drawn to scale, and similar component symbols are usually used to represent similar components.

[0024] According to an embodiment of the present utility model, an offset printing bending machine is provided. Embodiment 1

[0025] As Figures 1-4As shown in the figure, an offset bending machine according to an embodiment of the present utility model includes an operation box 1. At the four corners of the top of the operation box 1, support rods 2 are respectively fixedly connected. At the top of the support rods 2, a top plate 3 is fixedly connected. In the middle of the top side of the top plate 3, a hydraulic cylinder 4 is fixedly connected. The movable end of the hydraulic cylinder 4 penetrates the bottom side of the top plate 3 and is fixedly connected with a stamping head 6. The top of the operation box 1 is symmetrically connected with placing seats 5. A support seat 7 is supported on the placing seats 5. First arc grooves 8 are dug on the opposite sides of the placing seats 5. The stamping head 6 includes an assembly groove plate 9, a semi-circular punching block 10, and a connecting protrusion 11. The connecting protrusion 11 is arranged in the middle of the top side of the semi-circular punching block 10, and the semi-circular punching block 10 is slidably connected inside the assembly groove plate 9. The movable end of the hydraulic cylinder 4 is fixedly connected with the middle of the top side of the assembly groove plate 9. On both sides of the outer wall of the assembly groove plate 9 and on both sides of the outer wall of the connecting protrusion 11, bolt holes are equidistantly penetrated. And the assembly groove plate 9 is threadedly connected with a positioning bolt 12 through the bolt holes, and is connected through the positioning bolt 12 to match and penetrate the threaded holes on both sides of the outer wall of the connecting protrusion 11. The semi-circular punching block 10 is slidably inserted into the assembly groove plate 9 through the connecting protrusion 11. The top side of the semi-circular punching block 10 is attached to the bottom side of the semi-circular groove plate 9. Then, the positioning bolt 12 is sequentially threadedly connected into the bolt holes on both sides of the outer wall of the assembly groove plate 9 and on both sides of the outer wall of the connecting protrusion 11. The semi-circular punching block 10 can be quickly replaced. When the semi-circular punching block 10 is worn, it can be conveniently replaced. And the semi-circular punching block 10 with a suitable size can be replaced according to the width of the printing plate, greatly improving the practicability. Embodiment 2

[0026] As Figures 1-4As shown in the figure, a flexographic plate bending machine according to an embodiment of the present utility model includes an operation box 1. At the four corners of the top of the operation box 1, support rods 2 are respectively fixedly connected. The top of the support rods 2 is fixedly connected with a top plate 3. In the middle of the top side of the top plate 3, a hydraulic cylinder 4 is fixedly connected. The movable end of the hydraulic cylinder 4 penetrates the bottom side of the top plate 3 and is fixedly connected with a punching head 6. The top of the operation box 1 is symmetrically connected with placing seats 5. The placing seats 5 support a support seat 7. First arc grooves 8 are respectively dug on the opposite sides of the placing seats 5. Synchronous motors 13 are respectively fixedly connected to the left and right sides of the operation box 1. Installation grooves 14 are symmetrically dug in the middle of the top side of the operation box 1. Threaded rods 15 are arranged inside the installation grooves 14. Guide rods 16 are symmetrically arranged on both sides of the threaded rods 15. The inner ends of the threaded rods 15 are connected to the inner walls of the installation grooves 14 through bearings. The output shafts of the synchronous motors 13 extend into the installation grooves 14, and the output shafts of the synchronous motors 13 are fixedly connected to the outer ends of the threaded rods 15. Moving blocks 17 are sleeved on the outer sides of the threaded rods 15 and the guide rods 16. The top sides of the moving blocks 17 are fixedly connected to the bottoms of the placing seats 6. Nuts are penetrated through the moving blocks 17 through bearings and are respectively in threaded connection with the threaded rods 15 through the nuts. By simultaneously starting the synchronous motors 13, the output shafts of the synchronous motors 13 respectively drive the threaded rods 15 to rotate. The outer walls of the left threaded rod 15 and the right threaded rod 15 are respectively a positive thread groove and a reverse thread groove, so that the moving blocks 17 on the outer sides of the threaded rods 15 and the guide rods 16 can simultaneously drive the placing seats 5 to move inwards or outwards, and the width of the placing seats 5 for placing and supporting can be flexibly adjusted according to the size of the printing plate, which is suitable for bending operations on printing plates of different sizes, and further improves the applicable range of printing plate bending.

[0027] Embodiment 3

[0028] As Figures 1-4As shown in the figure, a flexographic plate bending machine according to an embodiment of the present invention includes an operation box 1. Four corners of the top of the operation box 1 are respectively fixedly connected with support rods 2. The top of the support rods 2 is fixedly connected with a top plate 3. The middle part of the top side of the top plate 3 is fixedly connected with a hydraulic cylinder 4. The movable end of the hydraulic cylinder 4 penetrates the bottom side of the top plate 3 and is fixedly connected with a stamping head 6. The top of the operation box 1 is symmetrically connected with placing seats 5. The placing seats 5 support a support seat 7. First arc grooves 8 are dug on the opposite sides of the placing seats 5. The middle part of the top side of the operation box 1 is provided with a movable through opening 18 in a penetrating manner. The support seat 7 is arranged inside the movable through opening 18 and is movably connected with the inside of the movable through opening 18. A second arc groove 21 is dug on the top side of the support seat 7. Chamfers are provided above the inner walls of the first arc grooves 8. A telescopic cylinder 20 is arranged on the bottom side of the support seat 7. The bottom side of the telescopic cylinder 20 is fixedly connected with the bottom side of the inner wall of the operation box 1. The movable end of the telescopic cylinder 20 is fixedly connected with the middle part of the bottom side of the support seat 7. When the width of the placing seat 5 is adjusted, the telescopic cylinder 20 can be started according to the distance between the first arc grooves 8, so that the movable end of the telescopic cylinder 20 drives the support seat 7 to rise, so that the second arc groove 21 on the top side of the support seat 7 is adapted to the second arc groove 8 inside the placing seat 5. When the placing seat 5 expands outwards according to the size of the printing plate, it can also ensure that the second arc groove 21 and the first arc groove 8 form an arc, improving the stability of the bending operation. And after the bending is completed, the support seat 7 connected to the movable end of the telescopic cylinder 20 can be controlled to continue to rise, which can eject the bent printing plate out between the placing seats 5, eliminating the need for staff to manually pick out the printing plate, and making the material taking operation more convenient.

[0029] In summary, by means of the above technical solution of the present utility model, when this device is in use, the semi-circular punch block 10 is slidably inserted into the interior of the assembly groove plate 9 through the connecting protrusion 11. The top side of the semi-circular punch block 10 is in contact with the bottom side of the semi-circular groove plate 9. Then, the positioning bolts 12 are sequentially threaded through the bolt holes on both sides of the outer wall of the assembly groove plate 9 and the outer wall of the connecting protrusion 11, so that the semi-circular punch block 10 can be quickly replaced. By simultaneously starting the synchronous motor 13, the output shafts of the synchronous motor 13 drive the threaded rods 15 to rotate respectively. The outer wall of the left threaded rod 15 and the outer wall of the right threaded rod 15 are respectively a positive thread groove and a reverse thread groove, which can enable the threaded rods 15 and the moving blocks 17 on the outer sides of the guide rods 16 to drive the placing seat 5 to move inwards or outwards at the same time, and can flexibly adjust the width of the placing seat 5 for placing and supporting according to the size of the printing plate. When the width of the placing seat 5 is adjusted, the telescopic cylinder 20 can be started according to the spacing of the first arc-shaped groove 8, so that the movable end of the telescopic cylinder 20 drives the support seat 7 to rise, and the second arc-shaped groove 21 on the top side of the support seat 7 is adapted to the second arc-shaped groove 8 on the inner side of the placing seat 5. When the placing seat 5 expands outwards according to the size of the printing plate, it can also ensure that the second arc-shaped groove 21 and the first arc-shaped groove 8 form an arc. And after the bending is completed, the support seat 7 connected to the movable end of the telescopic cylinder 20 can be controlled to continue to rise, and the bent printing plate can be ejected between the placing seats 6, without the need for staff to manually pick out the printing plate.

[0030] The above are only the preferred embodiments of the present utility model and are not intended to limit the present utility model. Any modifications, equivalent replacements, improvements, etc. made within the spirit and principle of the present utility model shall be included in the protection scope of the present utility model.

Claims

1. An offset printing plate bending machine, comprising an operating box (1), characterized in that: The four corners of the top of the operation box (1) are respectively fixedly connected to support rods (2), the top of the support rods (2) is fixedly connected to a top plate (3), the middle of the top side of the top plate (3) is fixedly connected to a hydraulic cylinder (4), the movable end of the hydraulic cylinder (4) passes through the bottom side of the top plate (3) and is fixedly connected to a punching head (6), the top of the operation box (1) is symmetrically connected to a placement seat (5), the placement seat (5) is supported by a support seat (7), and the first arc groove (8) is excavated on the opposite side of the placement seat (5); The punch head (6) comprises a mounting groove plate (9), a semicircular punch block (10), and a connecting protrusion (11); the connecting protrusion (11) is arranged at the middle part of the top side of the semicircular punch block (10); the semicircular punch block (10) is slidably connected to the inside of the mounting groove plate (9); and the movable end of the hydraulic cylinder (4) is fixedly connected to the middle part of the top side of the mounting groove plate (9); Bolt holes are equidistantly provided on both sides of the outer wall of the assembly slot plate (9) and on both sides of the outer wall of the connecting protrusion (11), and the assembly slot plate (9) is threadedly connected with positioning bolts (12) through the bolt holes, and the positioning bolts (12) are matched and connected with the threaded holes on both sides of the outer wall of the connecting protrusion (11).

2. The offset printing plate bending machine according to claim 1, characterized in that: The left and right sides of the operation box (1) are respectively fixedly connected with synchronous motors (13); a mounting groove (14) is symmetrically excavated in the middle of the top side of the operation box (1); threaded rods (15) are arranged inside the mounting grooves (14); and guide rods (16) are symmetrically arranged on both sides of the threaded rods (15).

3. The offset printing plate bending machine according to claim 2, characterized in that: The inner end of the threaded rod (15) is connected to the inner wall of the mounting groove (14) via a bearing, the output shaft of the synchronous motor (13) extends into the mounting groove (14), and the output shaft of the synchronous motor (13) is fixedly connected to the outer end of the threaded rod (15).

4. The offset printing plate bending machine according to claim 3, characterized in that: The threaded rod (15) and the guide rod (16) are both sleeved with a moving block (17), the top side of the moving block (17) is fixedly connected to the bottom of the placement seat (5), and a nut is passed through the inside of the moving block (17) via a bearing, and is threadedly connected to the threaded rod (15) through the nut.

5. The offset printing plate bending machine according to claim 4, characterized in that: A movable opening (18) is provided through the middle of the top side of the operation box (1); the support seat (7) is arranged inside the movable opening (18) and is movably connected to the inside of the movable opening (18); a second arc-shaped groove (21) is excavated on the top side of the support seat (7); and chamfers are provided on the upper inner wall of the first arc-shaped groove (8).

6. The offset printing plate bending machine according to claim 5, characterized in that: A telescopic cylinder (20) is provided on the bottom side of the support seat (7), the bottom side of the telescopic cylinder (20) is fixedly connected to the bottom side of the inner wall of the operation box (1), and the movable end of the telescopic cylinder (20) is fixedly connected to the middle part of the bottom side of the support seat (7).

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