Printing machine for printing corrugated boards

Abstract

The utility model discloses a printing machine for printing corrugated boards, which belongs to the field of printing and comprises a workbench and a printing mechanism arranged on the upper side face of the workbench, a fixing frame is arranged on the upper side face of the workbench and located in front of the printing mechanism, and a pair of air cylinders is arranged on the fixing frame. The output end of the air cylinder is fixedly connected with a mounting frame, auxiliary flattening parts are arranged on the front side face and the rear side face of the mounting frame correspondingly, elastic stretching parts are arranged between the mounting frame and the auxiliary flattening parts, and the two ends of the elastic stretching parts are hinged to the mounting frame and the auxiliary flattening parts correspondingly. According to the printing machine for printing the corrugated boards, the main pressing roller and the auxiliary flattening part are arranged in the feeding direction of the printing mechanism, the corrugated boards entering the printing mechanism are flattened, the main pressing roller is responsible for flattening the boards, the auxiliary flattening part avoids the phenomenon that the two sides of the main pressing roller of the boards tilt, and therefore the surfaces of the boards can be smoother, and the quality of the boards is improved. Therefore, the printing effect is improved, and printed matters are clearer and more attractive.

Description

Technical Field

[0001] The utility model relates to the technical field of printing, in particular to a printing machine for printing corrugated paperboard. Background Art

[0002] Corrugated cardboard is made of at least one layer of corrugated paper and one layer of boxboard (also called boxboard), and has good elasticity and extensibility. It is mainly used to make cartons, sandwiches for cartons, and other packaging materials for fragile goods. Corrugated cardboard printing can print various colorful and exquisite pictures and texts on corrugated cardboard to enhance the visual effect of the goods and increase the added value of the goods.

[0003] The current printing presses for printing corrugated cardboard have certain defects when in use. During the production process of corrugated cardboard, it is affected by different factors such as temperature and humidity, which will cause the moisture content of the cardboard to be uneven, resulting in an uneven surface of the cardboard. The uneven cardboard surface will cause the ink to not evenly cover the cardboard surface during printing, making the printed text or pattern unclear. In order to avoid unclear printing, the cardboard is flattened by a pressing roller before entering the printing press. However, a single pressing roller cannot ensure that the surface of the cardboard is completely flattened. When the pressing roller is pressed into the cardboard surface, the cardboard on both sides of the pressing roller will warp, which can easily cause the cardboard to deform. Therefore, improvements are now being made to the printing presses for printing corrugated cardboard. Utility Model Content

[0004] The utility model aims to solve the problems that the flattening effect of the existing corrugated cardboard is not good during the flattening process before printing and the cardboard will be warped during the flattening process, and proposes a printing machine for printing corrugated cardboard.

[0005] In order to achieve the above-mentioned purpose, the utility model adopts the following technology to print corrugated cardboard printing machine, including a workbench and a printing mechanism arranged on the side of the workbench, a fixed frame is arranged on the upper side of the workbench in front of the printing mechanism, a pair of cylinders are arranged on the fixed frame, a mounting frame is fixedly connected to the output end of the cylinder, and a main pressing roller is arranged on the mounting frame, auxiliary flattening parts are arranged on the front and rear sides of the mounting frame, and the upper end of the auxiliary flattening part is hingedly connected to the mounting frame, an elastic stretching part is arranged between the mounting frame and the auxiliary flattening part, and the two ends of the elastic stretching part are respectively hinged to the mounting frame and the auxiliary flattening part, and the auxiliary flattening parts are distributed in an eight-shaped shape on the front and rear sides of the main pressing roller.

[0006] As a further description of the above technical solution: the piston rod of the cylinder passes through the fixed frame, and the mounting frame and the main pressure roller are lifted and moved in the U-shaped fixed frame through the cylinder, and the main pressure roller is rotatably connected to the mounting frame.

[0007] As a further description of the above technical solution: the auxiliary flattening part includes a pair of fixed rods, the lower ends of the fixed rods are provided with auxiliary pressing rollers, and the upper ends of the fixed rods are hingedly connected with a first connecting member;

[0008] The first connecting member is fixed on the mounting frame, and the fixing rod is hinged to the mounting frame through the first connecting member.

[0009] As a further description of the above technical solution: the length of the auxiliary pressing roller is the same as that of the main pressing roller, and the auxiliary pressing roller and the main pressing roller are distributed in parallel.

[0010] As a further description of the above technical solution: the elastic stretching portion includes a telescopic component, and two ends of the telescopic component are respectively hinged with a second connecting member and a third connecting member;

[0011] The lower end of the telescopic assembly is hinged to the mounting frame through a second connecting piece, and the upper end of the telescopic assembly is hinged to the fixing rod through a third connecting piece.

[0012] As a further description of the above technical solution: the telescopic assembly includes a connecting sleeve, one end of which is slidably connected to a connecting rod, a spring is arranged inside the connecting sleeve, and one end of the spring is fixedly connected to the connecting rod, and connecting ends are arranged on the connecting sleeve and the connecting rod.

[0013] In summary, due to the adoption of the above technical solution, the beneficial effects of the utility model are:

[0014] By arranging a main pressing roller and an auxiliary flattening part in the feeding direction of the printing mechanism, the corrugated cardboard entering the printing mechanism is flattened. The main pressing roller is responsible for flattening the cardboard to avoid unevenness on the cardboard surface. The auxiliary flattening part opens in an eight-shaped shape after the main pressing roller is pressed down, and the elastic stretching part is used to make the auxiliary pressing roller have downward elastic pressure. While the auxiliary pressing roller plays an auxiliary flattening role, the auxiliary pressing rollers distributed in an eight-shaped shape can press the cardboard on both sides of the main pressing roller to avoid the cardboard on both sides from warping up when the main pressing roller is flattened, ensuring that the cardboard can be flattened, thereby avoiding printing confusion caused by unevenness on the cardboard surface, making the cardboard surface smoother, thereby improving the printing effect and making the printed matter clearer and more beautiful. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] Figure 1 The overall structure schematic diagram provided according to the embodiment of the utility model is shown;

[0016] Figure 2 A partial structural schematic diagram according to an embodiment of the utility model is shown;

[0017] Figure 3 A schematic diagram of the structure of the auxiliary flattening portion provided according to an embodiment of the utility model is shown;

[0018] Figure 4 A schematic diagram of the structure of the elastic stretching portion provided according to an embodiment of the utility model is shown;

[0019] Figure 5 A structural schematic diagram of a telescopic assembly provided according to an embodiment of the utility model is shown.

[0020] Legend:

[0021] 1. Workbench; 2. Printing mechanism; 3. Fixed frame; 4. Cylinder; 5. Mounting frame; 6. Main pressing roller; 7. Auxiliary pressing part; 71. Fixed rod; 72. Auxiliary pressing roller; 73. First connecting piece; 8. Elastic stretching part; 81. Telescopic assembly; 811. Connecting sleeve; 812. Connecting rod; 813. Spring; 814. Connecting end; 82. Second connecting piece; 83. Third connecting piece. DETAILED DESCRIPTION

[0022] 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. Based on the embodiments of the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0023] Reference Figure 1-Figure 2 The printing machine for printing corrugated cardboard provided in this embodiment includes a workbench 1, on which a printing mechanism 2 is arranged. The printing mechanism 2 transfers ink to the image and text part of the printing plate through an ink tank, and then transfers the ink of the image and text part to the corrugated cardboard under the pressure of the impression roller to form a clear image and text. A fixing frame 3 is arranged in front of the printing mechanism 2 on the workbench 1. A lifting mounting frame 5 is arranged in the U-shaped fixing frame 3 through a cylinder 4, and a main pressing roller 6 for flattening the corrugated cardboard is rotatably installed in the mounting frame 5. Two auxiliary flattening parts 7 distributed in an eight-shaped pattern are arranged on the front and rear sides of the mounting frame 5. The auxiliary flattening parts 7 are arranged on the front and rear sides of the mounting frame 5. The upper end of the part 7 is hinged on the mounting frame 5, and an elastic stretching part 8 that can be elastically telescopically moved is arranged between the mounting frame 5 and the auxiliary flattening part 7. The corrugated cardboard to be printed is fed under the main pressing roller 6 under the action of the feeding mechanism, and then the cylinder 4 drives the main pressing roller 6 to press on the surface of the cardboard. After the main pressing roller 6 is pressed down, the auxiliary flattening part 7 opens in an eight-shaped shape, and the elastic stretching part 8 is used to make the auxiliary flattening part 7 have downward elastic pressure. While the auxiliary flattening part 7 plays an auxiliary flattening role, the auxiliary flattening part 7 with an eight-shaped distribution can press the cardboards on both sides of the main pressing roller 6, so as to avoid the cardboards on both sides being lifted up when the main pressing roller 6 is flattened, and ensure that the cardboard can be flattened.

[0024] Reference Figure 3 The auxiliary flattening part 7 includes a pair of fixed rods 71, the lower ends of the fixed rods 71 ​​are provided with auxiliary pressing rollers 72, and the upper ends of the fixed rods 71 ​​are hingedly connected with first connecting members 73;

[0025] The first connecting piece 73 is fixed on the mounting frame 5, and the fixing rod 71 is hinged to the mounting frame 5 through the first connecting piece 73. The hinged fixing rod 71 can rotate, and cooperates with the elastic stretching part 8 to make the fixing rod 71 have a restoring force after being pressed down and opened, so that the auxiliary pressing roller 72 at the lower end of the fixing rod 71 has a downward elastic force to ensure that the auxiliary pressing roller 72 can prevent the cardboard on both sides of the main pressing roller 6 from curling up while flattening.

[0026] Among them, the length of the auxiliary pressure roller 72 is the same as that of the main pressure roller 6, and the auxiliary pressure roller 72 is distributed in parallel with the main pressure roller 6. The parallel distribution of the main pressure roller 6 and the auxiliary pressure roller 72 can avoid the phenomenon of uneven pressure during the flattening process and ensure that the pressure of the main pressure roller 6 and the auxiliary pressure roller 72 is even.

[0027] Reference Figure 4-Figure 5 The elastic stretching portion 8 includes a telescopic component 81, and two ends of the telescopic component 81 are respectively hinged with a second connecting member 82 and a third connecting member 83;

[0028] The lower end of the telescopic assembly 81 is hinged to the mounting frame 5 through the second connecting piece 82, and the upper end of the telescopic assembly 81 is hinged to the fixed rod 71 through the third connecting piece 83. The two ends of the telescopic assembly 81 are hinged to the mounting frame 5 and the fixed rod 71, so that the fixed rod 71 can be opened after the main pressing roller 6 is pressed down, and a downward pulling force can be provided after the fixed rod 71 is opened, so that the auxiliary pressing roller 72 presses the cardboard tightly to avoid the phenomenon of cardboard warping.

[0029] Among them, the telescopic component 81 includes a connecting sleeve 811, one end of which is slidably connected to a connecting rod 812, a spring 813 is arranged inside the connecting sleeve 811, and one end of the spring 813 is fixedly connected to the connecting rod 812, and connecting ends 814 are arranged on the connecting sleeve 811 and the connecting rod 812. The spring 813 provides elastic restoring force, so that the connecting rod 812 can be elastically telescopically moved on the connecting sleeve 811, thereby providing a downward pulling force for the auxiliary flattening part 7.

[0030] Working principle: when using the printing machine for printing corrugated cardboard of the present application, the corrugated cardboard to be printed is fed under the main pressing roller 6 under the action of the feeding mechanism, and then the cylinder 4 drives the main pressing roller 6 to press on the surface of the cardboard. After the main pressing roller 6 is pressed down, the auxiliary flattening part 7 opens in an eight-shaped shape, and the elastic stretching part 8 is used to make the auxiliary flattening part 7 have downward elastic pressure. While the auxiliary flattening part 7 plays an auxiliary flattening role, the auxiliary flattening part 7 distributed in an eight-shaped shape can press the cardboard on both sides of the main pressing roller 6 to avoid the main pressing roller 6 causing the cardboard on both sides to tilt up when flattening, ensuring that the cardboard can be flattened, and the flattened cardboard is fed into the printing mechanism 2, and the printing mechanism 2 transfers the ink to the image and text part of the printing plate through the ink groove, and then under the action of the pressure of the impression cylinder, the ink of the image and text part is transferred to the corrugated cardboard to form a clear image and text, thereby completing the printing work.

[0031] The above description is only a preferred specific implementation manner of the present invention, but the protection scope of the present invention is not limited thereto. Any technician familiar with the technical field can make equivalent replacements or changes within the technical scope disclosed by the present invention according to the technical scheme and the utility model concept of the present invention, which should be covered by the protection scope of the present invention.

Claims

1. A printing machine for printing corrugated cardboard, comprising a workbench (1) and a printing mechanism (2) arranged on the upper side of the workbench (1), characterized in that: A fixed frame (3) is arranged on the upper side of the workbench (1) in front of the printing mechanism (2), a pair of cylinders (4) are arranged on the fixed frame (3), a mounting frame (5) is fixedly connected to the output end of the cylinder (4), and a main pressing roller (6) is arranged on the mounting frame (5), auxiliary flattening parts (7) are arranged on the front and rear sides of the mounting frame (5), and the upper end of the auxiliary flattening part (7) is hingedly connected to the mounting frame (5), an elastic stretching part (8) is arranged between the mounting frame (5) and the auxiliary flattening part (7), and the two ends of the elastic stretching part (8) are respectively hingedly connected to the mounting frame (5) and the auxiliary flattening part (7), and the auxiliary flattening parts (7) are distributed in an eight-shaped manner on the front and rear sides of the main pressing roller (6).

2. The printing machine for printing corrugated cardboard according to claim 1, characterized in that: The piston rod of the cylinder (4) penetrates the fixed frame (3), and the mounting frame (5) and the main pressure roller (6) are lifted and moved in the fixed frame (3) of the U-shaped structure through the cylinder (4), and the main pressure roller (6) is rotatably connected to the mounting frame (5).

3. The printing machine for printing corrugated cardboard according to claim 1, characterized in that: The auxiliary flattening part (7) comprises a pair of fixed rods (71), the lower ends of the fixed rods (71) are provided with auxiliary pressing rollers (72), and the upper ends of the fixed rods (71) are hingedly connected to a first connecting member (73); The first connecting member (73) is fixed on the mounting frame (5), and the fixing rod (71) is hinged to the mounting frame (5) via the first connecting member (73).

4. The printing machine for printing corrugated cardboard according to claim 3, characterized in that: The length of the auxiliary pressing roller (72) is the same as that of the main pressing roller (6), and the auxiliary pressing roller (72) and the main pressing roller (6) are arranged in parallel.

5. The printing machine for printing corrugated cardboard according to claim 3, characterized in that: The elastic stretching part (8) comprises a telescopic component (81), and two ends of the telescopic component (81) are respectively hinged with a second connecting member (82) and a third connecting member (83); The lower end of the telescopic assembly (81) is hinged to the mounting frame (5) via a second connecting member (82), and the upper end of the telescopic assembly (81) is hinged to the fixing rod (71) via a third connecting member (83).

6. The printing machine for printing corrugated cardboard according to claim 5, characterized in that: The telescopic assembly (81) comprises a connecting sleeve (811), one end of which is slidably connected to a connecting rod (812), a spring (813) is arranged inside the connecting sleeve (811), and one end of the spring (813) is fixedly connected to the connecting rod (812), and a connecting end (814) is arranged on both the connecting sleeve (811) and the connecting rod (812).

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