Rolling letterpress printing device for color box

Abstract

The utility model relates to a rolling letterpress printing device for a color box, which comprises a printing table and a rolling mechanism, a mould groove is arranged in the middle of the printing table, a plurality of air holes surrounding the mould groove are arranged on the printing table, a first air valve communicated with the air holes is arranged on the lateral side of the printing table, and a positioning mechanism is arranged on the printing table and positioned on the lateral side of the mould groove. A pressing roller is arranged at one end of the rolling mechanism, and the pressing roller can abut against the printing table and cross the mold groove. The plurality of air holes surrounding the mold groove on the printing table are communicated with the first air valve on the side surface of the printing table, and the first air valve is communicated with an external air source to form negative pressure, so that a paperboard of a color box to be printed can be adsorbed by the air holes, and the paperboard is prevented from deviating in the printing process; the positioning mechanism on the printing table can position the paperboards on the mold, the problem of repeated positioning caused by mold replacement in the color register process is solved, and the printing accuracy is guaranteed.

Description

Technical Field

[0001] The utility model relates to the technical field of relief printing, and particularly relates to a rolling relief printing device for a color box. Background Art

[0002] The color box is made by overprinting in the relief printing technology. On the laser engraving die with pre - matched ink, the cardboard is subjected to rolling relief printing, and then through cutting and folding, the finished product is finally obtained. When designing and developing new relief printing patterns, it is necessary to match ink to the die, and then manually position and align the cardboard to be printed. Finally, printing is carried out through a pressure roller. Repeating this process many times is required to obtain the overprinted cardboard. During the whole process, since the die needs to be replaced to match different - colored inks, the cardboard needs to be loaded and unloaded repeatedly. And the repeated positioning of the cardboard results in inaccurate printing positions, and it is also easy to shift during the printing process, ultimately affecting the printing effect of the relief pattern, and it is difficult to judge whether the die is qualified, whether it can be manufactured on a large scale and put into production. Content of the Utility Model

[0003] To solve the above - mentioned technical problems, the utility model provides a rolling relief printing device for a color box, which can position and adsorb the cardboard to be printed, improve the repeated positioning accuracy of the cardboard, and ensure the accuracy and printing effect of printing.

[0004] The technical solution of the utility model is: a rolling relief printing device for a color box, including a printing table and a rolling mechanism. A die groove is provided in the middle of the printing table. A plurality of air holes surrounding the die groove are provided on the printing table. A first air valve communicated with the air holes is provided on the side of the printing table. A positioning mechanism is provided on the printing table, and the positioning mechanism is located on the side of the die groove. One end of the rolling mechanism is provided with a pressure roller, and the pressure roller can abut against the printing table and cross over the die groove.

[0005] Further, the length of the pressure roller is greater than the width of the die groove.

[0006] Further, the plurality of air holes surrounding the die groove are arranged in multiple groups in the inner - outer direction, and a plurality of first air valves corresponding to the multiple groups of air holes are respectively provided.

[0007] Further, the positioning mechanism includes a positioning plate and a lead screw. One end of the lead screw is rotatably connected to the positioning plate. Guide columns are provided on the positioning plate on both sides of the lead screw. A guide seat and a positioning seat are provided on the printing table. The guide columns are slidably connected with the guide seat, and the lead screw is in threaded transmission connection with the positioning seat. The lower end of the positioning plate is in contact with the printing table.

[0008] Further, the width of the positioning plate is greater than the diameter of the air hole.

[0009] Further, the positioning mechanism includes a lateral positioning mechanism and a longitudinal positioning mechanism that are perpendicular to each other. One end of the positioning plate is provided with a notch, and the positioning plates of the lateral positioning mechanism and the longitudinal positioning mechanism are staggered up and down at the notch.

[0010] Further, one end of the lead screw is provided with a handle.

[0011] Further, one end of the guide post is threadedly connected with a limit nut, and the limit nut can abut against the guide seat.

[0012] Further, an adsorption groove is provided in the mold groove, and a second air valve communicated with the adsorption groove is provided on the side of the printing table.

[0013] Further, a first countersunk hole is provided in the mold groove, a lifting table can be erected in the first countersunk hole, a cylinder is provided at the lower end of the printing table, and the cylinder rod of the cylinder passes through the first countersunk hole and is connected to the lifting table.

[0014] Further, a second countersunk hole is provided in the mold groove, and a ejector rod can be erected in the second countersunk hole.

[0015] Further, the ejector rod and the countersunk hole can be connected by threads.

[0016] Compared with the prior art, the advantages of the present utility model are as follows: Multiple air holes around the mold groove on the printing table are communicated with the first air valve on the side of the printing table. The first air valve is connected to an external air source and forms a negative pressure, so that the air holes can adsorb the cardboard of the color box to be printed, preventing the cardboard from shifting during the printing process; The positioning mechanism on the printing table can position the cardboard on the mold, preventing the problem of repeated positioning caused by replacing the mold during the color matching process, and ensuring the accuracy of printing. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] 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 for use in the description of the embodiments or the prior art. Obviously, the following drawings 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.

[0018] Figure 1 is a structural schematic diagram of the present utility model;

[0019] Figure 2 is a structural schematic diagram of the printing table of the present utility model;

[0020] Figure 3 is a structural schematic diagram of the bottom of the printing table of the present utility model.

[0021] Wherein: 1. Printing table; 2. Rolling mechanism; 3. Pressing roller; 4. Lateral positioning mechanism; 5. Longitudinal positioning mechanism; 6. Positioning seat; 7. Lead screw; 8. Handle; 9. Positioning plate; 10. Guide seat; 11. Guide post; 12. Limit nut; 13. Notch; 14. Air hole; 15. First air valve; 16. Adsorption groove; 17. Second air valve; 18. Mold groove; 19. First countersunk hole; 20. Lifting table; 21. Second countersunk hole; 22. Ejector rod; 23. Cylinder. Detailed implementation mode

[0022] To further elaborate on the technical means and effects adopted by the present invention to achieve the predetermined invention purpose, the following will, in conjunction with the accompanying drawings and preferred embodiments, detail the specific implementation mode, structure, features and their effects of the present invention as follows.

[0023] As Figures 1-3 shown, a rolling embossing device for a color box includes a printing table 1 and a rolling mechanism 2. A mold groove 18 is provided in the middle of the printing table 1, and a laser-engraved mold can be loaded in the mold groove 18. A plurality of air holes 14 surrounding the mold groove 18 are provided on the printing table 1. A first air valve 15 communicating with the air holes 14 is provided on the side of the printing table 1. The first air valve 15 is connected to an external air source to form a negative pressure, so that the air holes 14 can adsorb the cardboard of the color box to be printed, preventing the cardboard from shifting during the printing process; A positioning mechanism is provided on the printing table 1. The positioning mechanism is located on the side of the mold groove 18 and can position the cardboard on the mold, preventing the problem of repeated positioning caused by replacing the mold during the color matching process and ensuring the accuracy of printing; One end of the rolling mechanism 2 is provided with a pressing roller 3. The pressing roller 3 can abut against the printing table 1 and cross over the mold groove 18 to perform rolling embossing on the cardboard laid on the surface of the mold.

[0024] In the above embodiments, the length of the pressure roller 3 is greater than the width of the die groove 18. The upper end face of the printing table 1 provides stable support for the pressure roller 3, preventing all the pressure of the pressure roller 3 from being applied to the die, which may cause the die to slightly shift or one end to tilt in the die groove 18, thus affecting the accuracy of color overprinting. The multiple air holes 14 surrounding the die groove 18 are arranged in multiple groups in the inner and outer directions, and there are multiple corresponding first air valves 15 communicating with the multiple groups of air holes 14. The air holes 14 altogether include five groups, corresponding to and communicating with five first air valves 15. The corresponding air holes 14 can be enabled according to the size of the cardboard, or multiple groups of air holes 14 can be enabled simultaneously to provide a strong adsorption force. The positioning mechanism includes a positioning plate 9 and a lead screw 7. One end of the lead screw 7 is rotatably connected to the positioning plate 9. Guide columns 11 are provided on the positioning plate 9 on both sides of the lead screw 7. A guide seat 10 and a positioning seat 6 are provided on the printing table 1. The guide columns 11 are slidably connected to the guide seat 10 to provide guiding and auxiliary force-bearing functions. The lead screw 7 is threadedly connected to the positioning seat 6. By rotating the lead screw 7, the position of the positioning plate 9 can be adjusted to adapt to the size of the cardboard and adjust the position of the cardboard relative to the die. The lower end of the positioning plate 9 is in contact with the printing table 1 to ensure that the cardboard abuts against the side of the positioning plate 9, preventing the cardboard from entering between the positioning plate 9 and the printing table 1 and causing inaccurate positioning. The width of the positioning plate 9 is greater than the diameter of the air hole 14. After the positioning plate 9 is adjusted to the appropriate position by the lead screw 7, a group of air holes 14 at the corresponding position can be enabled to adsorb the positioning plate 9, preventing the position of the positioning plate 9 from shifting due to accidental contact with the lead screw 7. The positioning mechanism includes a horizontal positioning mechanism 4 and a vertical positioning mechanism 5 that are perpendicular to each other. A notch 13 is provided at one end of the positioning plate 9. The positioning plates 9 of the horizontal positioning mechanism 4 and the vertical positioning mechanism 5 are staggered up and down at the notch 13 to prevent interference with each other and affect the moving area of the positioning plate 9, ensuring the free movement of the positioning plate 9 within the adjustable stroke. A handle 8 is provided at one end of the lead screw 7 for facilitating the adjustment of the lead screw 7. A limit nut 12 is threadedly connected to one end of the guide column 11. The limit nut 12 can abut against the guide seat 10, and the moving area of the positioning plate 9 can be adjusted by the limit nut 12.

[0025] In the above embodiment, the mold groove 18 is provided with an adsorption groove 16, and the side of the printing table 1 is provided with a second air valve 17 connected to the adsorption groove 16. After the mold is loaded, the mold is adsorbed in the adsorption groove 16 through an external air source to make the mold more stable, and prevent the mold from shaking and deflecting due to the movement and pressure of the pressure roller 3 during the printing process, thereby affecting the printing effect. The mold groove 18 is provided with a first countersunk hole 19, and a lifting platform 20 can be set up in the first countersunk hole 19. The lower end of the printing table 1 is provided with a cylinder 23, and the cylinder 23 rod of the cylinder 23 passes through the first countersunk hole 19 and is connected to the lifting platform 20. After the mold is loaded into the mold groove 18, it is difficult to take it out, and it can be automatically lifted by the cylinder 23 and the lifting platform 20, which is convenient and quick. The mold groove 18 is provided with a second countersunk hole 21, and a push rod 22 can be set in the second countersunk hole 21. Due to the size deviation of the mold blank during manufacturing, when the size of the mold blank is too large and it is difficult to get out of the mold groove 18, the push rod 22 can be manually operated to push the mold out of the mold groove 18. The push rod 22 and the second countersunk hole 21 can be connected by a thread, which can adjust the height of the upper end surface of the push rod 22, thereby adjusting the height of the mold protruding from the surface of the printing table 1, and then adjusting the printing effect. When the mold is difficult to get out of the mold groove 18, a larger ejection force can be provided through the thread transmission to push the mold out of the mold groove 18.

[0026] Description of the working method of this utility model:

[0027] The upper end surface of the mold blank is laser engraved to form a mold with a relief printing pattern, and the mold is loaded into the mold groove 18 in a predetermined direction and adsorbed by the adsorption groove 16. At this time, the relief printing pattern is slightly higher than the upper end surface of the printing table 1, and the other parts are slightly lower than the upper end surface of the printing table 1; the cardboard to be printed is placed on the mold, and its adjacent two sides are simultaneously against the positioning plates 9 of the horizontal positioning mechanism 4 and the vertical positioning mechanism 5, and the positions of the positioning plates 9 in the horizontal positioning mechanism 4 and the vertical positioning mechanism 5 are adjusted by the screw rod 7, so as to adjust the position of the cardboard, align the area to be printed on the cardboard with the relief printing pattern, and printing can be carried out. The cardboard used for positioning is taken away, and the ink is evenly distributed to the relief printing pattern of the mold through the external ink supply device. The cardboard is put back into the designated area where it has been positioned, and the cardboard is adsorbed on the air hole 14 through the external air source, and the rolling mechanism 2 can be started; the driving part of the rolling mechanism 2 adopts the mechanical arm of the existing technology, and the pressure roller 3 adopts the existing technology with the outer layer of rubber material and the inner layer of metal material. The pressure roller 3 is driven to descend and abut the printing table 1, and walk on the surface of the printing table 1. When crossing the mold groove 18, the cardboard is pressed on the relief printing pattern coated with ink to complete the printing.

[0028] In overprinting, after the pattern of the first color is printed, the air source is disconnected to release the cardboard by the air hole 14, and at the same time, the adsorption groove 16 releases the mold. The mold is removed from the mold groove 18 by the first ejector rod 22 and the second ejector rod 22, and then the printing mold for the second color is replaced. Through the same steps and finally roll printing, and so on, a colored embossed layer is formed on the cardboard, and a color box is formed after cutting and folding. It is evaluated whether the trial production of the color box is qualified and whether the mold can be manufactured on a large scale and put into production.

[0029] The above embodiments are only used to illustrate the technical solutions of the present invention, rather than limiting it; although the present invention has been described in detail with reference to the foregoing embodiments, those of ordinary skill in the art should understand that: they can still modify the technical solutions described in the foregoing embodiments, or perform equivalent replacements on some or all of the technical features; and these modifications or replacements do not make the essence of the corresponding technical solutions deviate from the scope of the technical solutions of the embodiments of the present invention.

Claims

1. A rolling embossing device for a color box, comprising a printing table and a rolling mechanism, characterized in that: A mold groove is provided in the middle of the printing table, a plurality of air holes surrounding the mold groove are provided on the printing table, a first air valve communicating with the air holes is provided on the side of the printing table, a positioning mechanism is provided on the printing table, the positioning mechanism is located on the side of the mold groove, a pressure roller is provided at one end of the rolling mechanism, and the pressure roller can abut against the printing table and pass over the mold groove.

2. The rolling embossing device for a color box according to claim 1, characterized in that: The length of the pressing roller is greater than the width of the mold groove.

3. The rolling embossing device for a color box according to claim 1, characterized in that: The plurality of air holes surrounding the mold groove are arranged into a plurality of groups in the inner and outer directions, and a plurality of first air valves communicating with the plurality of groups of air holes are provided respectively corresponding to each other.

4. The rolling embossing device for a color box according to claim 1, characterized in that: The positioning mechanism includes a positioning plate and a screw, one end of the screw is rotatably connected to the positioning plate, guide columns are provided on the positioning plates on both sides of the screw, a guide seat and a positioning seat are provided on the printing table, the guide column is slidably connected to the guide seat, the screw is connected to the positioning seat through threaded transmission, the lower end of the positioning plate is attached to the printing table, and a handle is provided at one end of the screw.

5. The rolling embossing device for a color box according to claim 4, characterized in that: The width of the positioning plate is greater than the diameter of the air hole.

6. The rolling embossing device for a color box according to claim 4, characterized in that: The positioning mechanism comprises a transverse positioning mechanism and a longitudinal positioning mechanism which are perpendicular to each other. A notch is arranged at one end of the positioning plate. The positioning plates of the transverse positioning mechanism and the longitudinal positioning mechanism are staggered up and down at the notch.

7. The rolling embossing device for a color box according to claim 4, characterized in that: One end of the guide column is threadedly connected with a limiting nut, and the limiting nut can abut against the guide seat.

8. The rolling embossing device for a color box according to claim 1, characterized in that: An adsorption groove is arranged in the mold groove, and a second air valve communicating with the adsorption groove is arranged on the side of the printing table.

9. The rolling embossing device for a color box according to claim 1, characterized in that: A first countersunk hole is arranged in the mold groove, a lifting platform can be set up in the first countersunk hole, a cylinder is arranged at the lower end of the printing platform, and a cylinder rod of the cylinder passes through the first countersunk hole and is connected with the lifting platform.

10. The rolling embossing device for a color box according to claim 1, characterized in that: A second countersunk hole is provided in the mold groove, a push rod can be set in the second countersunk hole, and the push rod and the countersunk hole can be connected by threads.

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