Adjustable cylinder form positioning device for a curved surface offset printing machine

Abstract

The utility model discloses a kind of adjustable barrel mould positioning devices of curved surface offset press, including base, the base is set as U type, the top of the base is fixedly connected with disc, further including positioning assembly, in the top of disc, including fixedly installed in the cylinder of disc top, the free end of the cylinder is fixedly connected with pressure block, the top of the disc is fixedly connected with guide frame, and it is symmetrically distributed relative to cylinder, sliding block is slidably present on the guide frame, the outer wall of the sliding block is fixedly connected with horizontal cylinder, the inner wall of the horizontal cylinder is fixedly installed with electric push rod, the free end of the electric push rod is fixedly connected with piston, the end of the horizontal cylinder is fixedly connected with suction cup. The utility model belongs to barrel mould positioning technical field, specifically a kind of adjustable barrel mould positioning devices of curved surface offset press, which solves the problem that the size of printed barrel is not the same during printing, and often needs to replace barrel mould once for each replacement of printing barrel, increases the printing cost.

Description

Technical Field

[0001] This utility model belongs to the field of barrel mold positioning technology, and in particular relates to an adjustable barrel mold positioning device for a curved surface offset printing machine. Background Technology

[0002] Curved offset printing machines are a type of planar printing machine. During printing, the image is first printed from the printing plate onto the rubber roller, and then transferred from the rubber roller to the paper. Because the entire device needs to rotate continuously during the printing process, the barrel mold on the machine needs to match the size of the printing barrel to ensure that the printing barrel does not fall off during the printing process.

[0003] Since the barrels produced by different manufacturers are not exactly the same, the size of the barrels printed will also be different. Often, every time a barrel type is changed, the barrel mold needs to be changed. Due to the quality requirements of the barrel mold itself, it is generally very large and heavy. Each time it is changed, a lot of time is wasted, and the cost of the barrel mold is also very high, which increases the printing cost. Utility Model Content

[0004] The technical problem this invention aims to solve is that the size of the printing barrels varies during printing, and often the barrel mold needs to be changed every time a different type of printing barrel is used, which increases printing costs.

[0005] To solve the above-mentioned technical problems, the present invention adopts the following technical solution: an adjustable barrel mold positioning device for a curved offset printing machine, comprising a base, the base being U-shaped, a disc being fixedly connected to the top of the base, and further comprising...

[0006] A positioning assembly, located at the top of a disc, includes a cylinder fixedly mounted on the top of the disc, a pressure block fixedly connected to the free end of the cylinder, a guide frame fixedly connected to the top of the disc and symmetrically distributed relative to the cylinder, a slider sliding on the guide frame, a horizontal cylinder fixedly connected to the outer wall of the slider, an electric push rod fixedly mounted on the inner wall of the horizontal cylinder, a piston fixedly connected to the free end of the electric push rod, and a suction cup fixedly connected to the end of the horizontal cylinder.

[0007] Furthermore, the outer wall of the pressure block is inclined, the outer wall of the slider is inclined and fits against the outer wall of the pressure block, a limit strip is fixedly connected to the top of the disc, the slider and the limit strip are slidably connected, a fixed sleeve is fixedly connected to the cylinder, and a spring is fixedly connected between the fixed sleeve and the slider.

[0008] Furthermore, the disc has opposing stroke holes, and a guide rod is fixedly connected between the inner walls of the stroke holes. An adjusting rod slides on the guide rod, and a clamping plate is fixedly connected to the upper end of the adjusting rod.

[0009] Furthermore, the bottom wall of the disc is fixedly connected to symmetrically distributed base plates, and the inner walls of the base plates are rotatably connected to a bidirectional screw. The lower end of the adjusting rod passes through the bidirectional screw and is threadedly connected to it. A worm gear is fixedly connected to the middle of the bidirectional screw. A servo motor is fixedly installed at the bottom of the disc, and the output end of the servo motor is fixedly connected to a worm that meshes with the worm gear.

[0010] Furthermore, the top of the disc is provided with evenly distributed grooves, and the interior of the grooves is threaded with a post, and the center of the post is rotatably connected to a rotating cylinder.

[0011] Furthermore, the clamping plate is inclined, and the outer wall of the clamping plate is arc-shaped.

[0012] The beneficial effects of this utility model after adopting the above structure are as follows:

[0013] (1) The pressure block is driven by the cylinder, and the slider is pushed along the guide frame by the inclined surface. Combined with the electric push rod to control the piston to drive the suction cup to extend and retract, the positioning of the inner wall of the barrel of different diameter can be realized. The bidirectional screw rotates under the drive of the servo motor, worm and worm wheel, and drives the adjusting rod to slide along the guide rod, so that the clamping plate moves closer or further away synchronously, which can adapt to the lateral positioning requirements of barrels of different sizes. It can meet the printing positioning of various specifications of printing barrels without changing the barrel mold, which greatly reduces the cost.

[0014] (2) The inclined surfaces of the slider and the pressure block fit together, and with the elastic force of the spring, the suction cup can stably adsorb the barrel. The clamping plate is set in an arc shape and can fit tightly against the outer wall of the barrel, enhancing the clamping stability. The insert and the rotating cylinder provide auxiliary support during the rotation of the barrel, reducing shaking and ensuring the positional accuracy of the barrel during the printing process.

[0015] (3) The combination of power components such as cylinders, electric push rods, and servo motors realizes the automated control of positioning adjustment, reduces the intensity of manual operation, the limit bar guides and limits the sliding of the slider, and the guide rod ensures that the adjustment rod moves smoothly, which improves the accuracy and efficiency of positioning adjustment and shortens the adjustment time when changing the barrel type. Attached Figure Description

[0016] The accompanying drawings are provided to further understand the present invention and form part of the specification. They are used together with the embodiments of the present invention to explain the present invention and do not constitute a limitation thereof.

[0017] Figure 1 This is a schematic diagram of the overall structure of an adjustable barrel mold positioning device for a curved surface offset printing machine proposed in this utility model.

[0018] Figure 2 This is a front view of an adjustable barrel mold positioning device for a curved surface offset printing machine proposed in this utility model;

[0019] Figure 3 This is a three-dimensional structural diagram of an adjustable barrel mold positioning device for a curved surface offset printing machine proposed in this utility model.

[0020] Figure 4 This is a side view of an adjustable barrel mold positioning device for a curved surface offset printing machine proposed in this utility model.

[0021] Figure 5 This is a cross-sectional view of an adjustable barrel mold positioning device for a curved surface offset printing machine proposed in this utility model.

[0022] Figure 6 This is a schematic diagram of the internal structure of the horizontal cylinder of the adjustable barrel mold positioning device for a curved offset printing machine proposed in this utility model.

[0023] In the attached diagram: 1. Base, 2. Disc, 3. Cylinder, 4. Pressure block, 5. Guide frame, 6. Slider, 7. Horizontal cylinder, 8. Electric push rod, 9. Piston, 10. Suction cup, 11. Limiting strip, 12. Fixing sleeve, 13. Spring, 14. Stroke hole, 15. Guide rod, 16. Adjusting rod, 17. Clamping plate, 18. Base plate, 19. Bidirectional screw, 20. Worm gear, 21. Servo motor, 22. Worm, 23. Groove, 24. Insert post, 25. Rotary cylinder. Detailed Implementation

[0024] like Figure 1-6 As shown, an adjustable barrel mold positioning device for a curved offset printing machine has a U-shaped base 1 with a disc 2 fixedly connected to its top, providing the mounting foundation for the entire positioning device. The positioning components are located on top of the disc 2, and the core components include a cylinder 3, a pressure block 4, a guide frame 5, a slider 6, a cross cylinder 7, an electric push rod 8, a piston 9, and a suction cup 10. The cylinder 3 is fixedly mounted on top of the disc 2, and its free end is fixedly connected to a pressure block 4 with an inclined outer wall. The top of the disc 2 is fixedly connected to a guide frame 5 symmetrically distributed relative to the cylinder 3, and a sliding mechanism slides on the guide frame 5. The slider 6 has an inclined outer wall that fits against the outer wall of the pressure block 4. A limit strip 11 is fixedly connected to the top of the disc 2. The slider 6 is slidably connected to the limit strip 11. A spring 13 is connected between the fixed sleeve 12 fixed on the cylinder 3 and the slider 6 to provide a restoring force for the slider 6. A horizontal cylinder 7 is fixedly connected to the outer wall of the slider 6. An electric push rod 8 is fixedly installed on the inner wall of the horizontal cylinder 7. The free end of the electric push rod 8 is connected to a piston 9. A suction cup 10 is fixedly connected to the end of the horizontal cylinder 7. The extension, retraction and adsorption state of the suction cup 10 can be controlled by driving the piston 9 through the electric push rod 8.

[0025] The disc 2 has opposing stroke holes 14, and a guide rod 15 is fixedly connected inside the holes. An adjusting rod 16 slides on the guide rod 15. The upper end of the adjusting rod 16 is fixedly connected to a clamping plate 17 with an inclined arc shape. The bottom wall of the disc 2 is fixedly connected to symmetrically distributed base plates 18. The inner wall of the base plate 18 is rotatably connected to a bidirectional screw 19. The lower end of the adjusting rod 16 passes through the bidirectional screw 19 and is threaded to it. A worm gear 20 is fixedly connected to the middle of the bidirectional screw 19. A servo motor 21 is fixedly installed at the bottom of the disc 2. Its output end is connected to a worm 22 that meshes with the worm gear 20. When the servo motor 21 is running, it drives the bidirectional screw 19 to rotate through the worm 22 and the worm gear 20, causing the adjusting rod 16 to slide along the guide rod 15, so that the clamping plate 17 moves closer or further away synchronously.

[0026] The top of the disc 2 has evenly distributed grooves 23, and the grooves 23 are threaded to the inserts 24. The inserts 24 are rotatably connected to the rotating cylinder 25. The position of the rotating cylinder 25 can be adjusted to meet the support requirements of the barrel by screwing the inserts 24 into different grooves 23.

[0027] In practical use, the barrel to be printed is placed above the disc 2. The cylinder 3 is activated to push the pressure block 4 to move. The pressure block 4 presses the slider 6 through the inclined surface, causing the slider 6 to slide along the guide frame 5 and the limit strip 11. At the same time, the spring 13 is stretched, and the slider 6 drives the horizontal cylinder 7 and the suction cup 10 to approach the inner wall of the barrel. The electric push rod 8 drives the piston 9 to make the suction cup 10 make close contact with the inner wall of the barrel and adhere to it. Simultaneously, the servo motor 21 is activated, which drives the bidirectional screw 19 to rotate through the worm gear 22 and worm wheel 20. The adjusting rod 16 moves along the guide rod. 15 Slides, allowing the clamping plate 17 to fit and hold the barrel from the outer arc surface. According to the barrel diameter, the insert 24 is screwed into the corresponding groove 23. The rotating cylinder 25 contacts the bottom of the barrel to provide auxiliary support. During the printing process, when the barrel rotates, the rotating cylinder 25 rotates synchronously with it to reduce friction. The spring 13 ensures that the suction cup 10 is always tightly attached, and the clamping plate 17 is in stable contact with the barrel, achieving precise positioning of barrels of different specifications. When changing the barrel type, the positioning structure can be quickly adjusted by reversing the operation of each power component without changing the barrel mold.

[0028] Although embodiments of the present invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions, and alterations can be made to these embodiments without departing from the principles and spirit of the present invention, the scope of which is defined by the appended claims and their equivalents. In conclusion, if those skilled in the art, inspired by this description, design similar structural methods and embodiments without departing from the inventive spirit of the present invention, such designs should fall within the protection scope of the present invention.

Claims

1. An adjustable barrel mold positioning device for a curved offset printing machine, comprising a base (1), the base (1) being U-shaped, and a disc (2) fixedly connected to the top of the base (1), characterized in that: Also includes The positioning assembly, located at the top of the disc (2), includes a cylinder (3) fixedly installed on the top of the disc (2), a pressure block (4) fixedly connected to the free end of the cylinder (3), a guide frame (5) fixedly connected to the top of the disc (2), and the guide frame (5) is symmetrically distributed relative to the cylinder (3), a slider (6) slides on the guide frame (5), a horizontal cylinder (7) is fixedly connected to the outer wall of the slider (6), an electric push rod (8) is fixedly installed on the inner wall of the horizontal cylinder (7), a piston (9) is fixedly connected to the free end of the electric push rod (8), and a suction cup (10) is fixedly connected to the end of the horizontal cylinder (7).

2. The adjustable barrel mold positioning device for a curved surface offset printing machine according to claim 1, characterized in that: The outer wall of the pressure block (4) is inclined, the outer wall of the slider (6) is inclined and fits against the outer wall of the pressure block (4), the top of the disc (2) is fixedly connected to a limiting strip (11), the slider (6) and the limiting strip (11) are slidably connected, a fixing sleeve (12) is fixedly connected to the cylinder (3), and a spring (13) is fixedly connected between the fixing sleeve (12) and the slider (6).

3. An adjustable barrel mold positioning device for a curved surface offset printing machine according to claim 1 or 2, characterized in that: The disc (2) has opposing stroke holes (14), and a guide rod (15) is fixedly connected between the inner walls of the stroke holes (14). An adjusting rod (16) slides on the guide rod (15), and a clamping plate (17) is fixedly connected to the upper end of the adjusting rod (16).

4. The adjustable barrel mold positioning device for a curved surface offset printing machine according to claim 3, characterized in that: The bottom wall of the disc (2) is fixedly connected to symmetrically distributed base plates (18), and the inner walls of the base plates (18) are rotatably connected to a bidirectional screw (19). The lower end of the adjusting rod (16) passes through the bidirectional screw (19) and is threadedly connected to it. The middle part of the bidirectional screw (19) is fixedly connected to a worm gear (20). The bottom of the disc (2) is fixedly installed with a servo motor (21), and the output end of the servo motor (21) is fixedly connected to a worm (22) that meshes with the worm gear (20).

5. The adjustable barrel mold positioning device for a curved surface offset printing machine according to claim 4, characterized in that: The top of the disc (2) is provided with evenly distributed grooves (23), and the inside of the grooves (23) is threaded with a post (24), and the middle of the post (24) is rotatably connected to a rotating cylinder (25).

6. The adjustable barrel mold positioning device for a curved surface offset printing machine according to claim 3, characterized in that: The clamping plate (17) is inclined, and the outer wall of the clamping plate (17) is arc-shaped.

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