Food packaging bag printing machine

Abstract

The present invention relates to the field of packaging bag printing, and in particular to a food packaging bag printing machine, which specifically includes: a frame, on which a printing platform is arranged; a fixed frame, which is arranged on one side of the frame, and a mounting plate extends from one side of the fixed frame; a driving shaft, with a bearing connected to the mounting plate; a bevel gear, which is fixedly connected to one end of the driving shaft; a transmission belt, which is connected to one end of the driving shaft; and a stepping motor, which is connected to the transmission belt. A plurality of positioning seats are arranged around the center of the bevel gear and are hinged to the bevel gear; a plurality of printing components are respectively arranged on one side of the positioning seat; when the stepping motor drives the driving shaft to rotate step by step, the bevel gear is driven to rotate step by step, and the printing components with different colors of ink are switched. The present invention has the following beneficial effects: this food packaging bag printing machine can achieve multi-color printing through a single silk screen printing device, reduce the use area, and reduce costs.

Description

Technical Field

[0001] The invention relates to the field of packaging bag printing, in particular to a food packaging bag printing machine. Background Art

[0002] Food packaging bags are containers used to package and protect food, usually made of a variety of materials to meet the storage needs of different foods. The main function of food packaging bags is to protect food from the influence of the external environment, such as oxygen, moisture, light and microorganisms, thereby extending the shelf life of food.

[0003] With the changes of the times, in addition to its own functions, the aesthetics of food packaging bags are gradually valued by consumers. Food packaging bags with better printing can promote consumption, increase sales, and play a positive role in corporate publicity.

[0004] The specifications of food packaging bags vary, and they are adjusted accordingly according to the required food carrying capacity. Existing food packaging bags are generally printed with exquisite patterns on the surface of food packaging bags by a printing machine. There are many existing printing methods, including silk screen printing, pad printing, gravure printing, etc.

[0005] Among them, screen printing equipment is widely used in the printing industry as a printing machine with low cost and easy maintenance. The existing screen printing equipment has the following problems when in use:

[0006] Silk-screen printing equipment can only print monochrome patterns. If it is necessary to further make the packaging bag present a multi-color pattern, the existing technology generally uses multiple parallel silk-screen printing equipment, adds different colors of ink to each different silk-screen printing equipment, and carves out different pattern screens. By passing through each silk-screen printing equipment in turn, the final product has the characteristics of a multi-color pattern. However, the above method obviously requires a larger area of ​​use, and silk-screen printing equipment of corresponding colors needs to be purchased according to the number of colors, and the overall cost is relatively high. Summary of the invention

[0007] The purpose of the present invention is to provide a food packaging bag printing machine which can realize multi-color printing by a single screen printing device, thereby reducing the use area and the cost.

[0008] The above technical objectives of the present invention are achieved through the following technical solutions:

[0009] A food packaging bag printing machine includes: a frame, on which a printing platform is arranged; a fixed frame, arranged on one side of the frame, and a mounting plate extending from one side of the fixed frame; a driving shaft, a bearing connected to the mounting plate; a bevel gear, fixedly connected to one end of the driving shaft; a transmission belt, connected to one end of the driving shaft; a stepping motor, connected to the transmission belt. A plurality of positioning seats, arranged around the center of the bevel gear and hinged with the bevel gear; a plurality of printing components, respectively arranged on one side of the positioning seat; when the stepping motor drives the driving shaft to rotate step by step, the bevel gear is driven to rotate step by step, and the printing components with different color inks are switched.

[0010] The present invention is further configured as follows: the printing assembly includes: a mesh clamping plate, which is arranged at the bottom of the positioning seat; a mesh clamping frame, which is arranged at one side of the mesh clamping plate; a screen, which is connected between the two mesh clamping frames by bolts; a guide rail, which is arranged between the two mesh clamping plates; a sliding seat, which is slidably arranged on the guide rail; a sliding frame, which is connected to the sliding seat; cylinder one and cylinder two, which are arranged at the top of the sliding frame; a scraper, which is connected to the bottom of the output rod of cylinder one; and an ink return knife, which is connected to the bottom of the output rod of cylinder two.

[0011] The present invention is further configured to include: a column, which is arranged on one side of the frame; a beam, which is horizontally arranged on the column; a printing frame, which is slidably connected to the beam; a printing motor, which is arranged on one side of the beam and connected to the printing frame through a belt; a printing cylinder, which is connected to one side of the printing frame; and a clamp, which is connected to the output end of the printing cylinder.

[0012] The present invention is further configured to include: a rotating shaft, which is arranged on a fixed frame; a driven wheel, which is connected to the top of the rotating shaft and meshes with the bevel gear; a plurality of support columns, which are arranged around the center of the driven wheel and on the top of the driven wheel; a support plate, which is arranged on the top of the support column; an injection cylinder, which is fixedly penetrated at one end of the support plate, and an injection head is arranged at the bottom of the injection cylinder; a piston, which is slidably connected in the injection cylinder; a pressing rod, which is connected to the top of the piston; a pressing cylinder, whose bearing is connected to the middle of the driven wheel; and a pressing plate, which is connected to the output end of the pressing cylinder.

[0013] The present invention is further configured as follows: two net clamping fixing plates and two net clamping frames are each provided, and a connecting rod is fixedly connected between the two net clamping fixing plates.

[0014] The present invention is further configured as follows: bolts capable of adjusting the positions of the scraper and the ink return knife are arranged on both the first cylinder and the second cylinder.

[0015] The present invention is further configured such that: the clamping claw is connected to the sliding frame by pneumatic means or magnetic means.

[0016] The present invention is further configured such that the number of support columns is the same as the number of printing components.

[0017] In summary, the present invention has the following beneficial effects:

[0018] 1. Multi-color printing capability: Multi-color printing can be achieved through a single device, without the need for multiple parallel screen printing devices, which greatly reduces the equipment footprint and reduces equipment purchase and maintenance costs.

[0019] 2. High flexibility: Different colors of ink can be input on different printing components, and different patterns of screens can be used to achieve flexible and varied printing effects.

[0020] 3. Precise control: The combination of stepper motor and transmission belt can accurately control the rotation of bevel gear, realize accurate switching of different printing components, and automatically inject ink of corresponding color into the screen, reducing labor cost and improving efficiency of adding ink.

[0021] 4. Optimization of ink supply system: The components such as syringe barrel, piston and pressing cylinder are designed to accurately control the ink supply and reduce waste.

[0022] 5. Easy maintenance: Compared with multiple parallel screen printing equipment, the maintenance of a single multi-color printing machine is easier.

[0023] 6. High cost-effectiveness: Multi-color printing can be achieved through a single device, which not only saves space, but also reduces equipment investment and operating costs, and improves economic benefits. BRIEF DESCRIPTION OF THE DRAWINGS

[0024] Figure 1 It is a structural schematic diagram of a food packaging bag printing machine;

[0025] Figure 2 It is a schematic diagram of the left view of the structure of a food packaging bag printing machine;

[0026] Figure 3 is a schematic diagram of the structure of the printing assembly;

[0027] Figure 4 for Figure 2 A magnified view of area A;

[0028] Figure 5 It is a schematic diagram of the right view of the food packaging bag printing machine.

[0029] 1. Printing frame; 2. Printing platform; 3. Fixing frame; 4. Mounting plate; 5. Driving shaft; 6. Bevel gear; 7. Positioning seat; 8. Printing assembly; 81. Net clamping fixing plate; 82. Net clamping frame; 83. Connecting rod; 84. Screen; 85. Guide rail; 86. Sliding seat; 87. Sliding frame; 88. Cylinder 1; 89. Cylinder 2; 810. Scraper; 811. Ink return knife; 9. Column; 10. Crossbeam; 11. Printing frame; 12. Printing motor; 13. Printing cylinder; 14. Clamp; 15. Transmission belt; 16. Stepping motor; 17. Rotating shaft; 18. Driven wheel; 19. Support column; 20. Support plate; 21. Injection barrel; 22. Injection head; 23. Piston; 24. Pressing rod; 25. Pressing cylinder; 26. Pressing plate. DETAILED DESCRIPTION

[0030] In the description of the present invention, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "page", "bottom", "inside", "outside", "clockwise", "counterclockwise" and the like indicating orientations or positional relationships are based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the referred device or element must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be understood as limiting the present invention.

[0031] In addition, the terms "first" and "second" are used for descriptive purposes only and should not be understood as indicating or implying relative importance or implicitly indicating the number of the indicated technical features. Thus, the features defined as "first" and "second" may explicitly or implicitly include one or more of the features.

[0032] In the description of the present invention, "multiple" means two or more than two, unless otherwise clearly defined. In the present invention, unless otherwise clearly defined and defined, the terms "installed", "connected", "connected", "fixed" and the like should be understood in a broad sense. For example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection, or it can be indirectly connected through an intermediate medium, or it can be internal communication between two elements. For those of ordinary skill in the art, the specific meanings of the above terms in the present invention can be understood according to the specific circumstances.

[0033] The present invention is further described in detail below in conjunction with the accompanying drawings.

[0034] like Figure 1As shown, a food packaging bag printing machine comprises a frame 1. A printing platform 2 is arranged on the frame 1. A packaging bag can be placed on the printing platform 2, or a corresponding film roll can be arranged on one side of the printing platform 2, and automatic printing is performed by unwinding the packaging bag film roll.

[0035] like Figure 1 As shown, in order to achieve the technical purpose of realizing multi-color printing by a single screen printing machine. The present application is provided with a fixing frame 3 on one side of the frame 1, and a mounting plate 4 extends from one side of the fixing frame 3. A driving shaft 5 (such as Figure 5 As shown). One end of the driving shaft 5 is fixedly connected to a bevel gear 6. A plurality of positioning seats 7 are arranged around the center of the bevel gear 6 on one side of the bevel gear 6. The positioning seats 7 are hinged to the bevel gear 6 so that the positioning seats 7 are always kept in a vertical state under their own weight.

[0036] like Figure 2 As shown, correspondingly, a printing assembly 8 is provided on one side of the positioning seat 7 .

[0037] like Figure 3 As shown, the printing assembly 8 includes a clamping mesh fixing plate 81 arranged at the bottom of the positioning seat 7. A clamping mesh frame 82 is arranged on one side of the clamping mesh fixing plate 81. The clamping mesh frame 82 is fixedly connected to the clamping mesh fixing plate 81. There are two clamping mesh fixing plates 81 and two clamping mesh frames 82. A connecting rod 83 is fixedly connected between the two clamping mesh fixing plates 81. The connecting rod 83 serves to connect the two clamping mesh fixing plates 81. A screen 84 can be connected between the clamping mesh frames 82 by bolts. The screen 84 can be engraved with corresponding pattern holes on its surface according to actual needs, and after the ink is input, it is transferred to the packaging bag through pressure.

[0038] A guide rail 85 is arranged between the two clamping net fixing plates 81. A sliding seat 86 is arranged on the guide rail 85 for sliding. The sliding seat 86 is connected to a sliding frame 87. Cylinder 1 88 and cylinder 2 89 are arranged on the top of the sliding frame 87. Among them, a scraper 810 is connected to the bottom of the output rod of cylinder 1 88. An ink return knife 811 is connected to the bottom of the output rod of cylinder 2 89. Cylinder 1 88 and cylinder 2 89 control the up and down movement of the scraper 810 and the ink return knife 811 respectively. Correspondingly, bolts for adjusting the positions of the scraper 810 and the ink return knife 811 are arranged on cylinder 1 88 and cylinder 2 89, so as to test whether the printing pressure can print a clear pattern before printing.

[0039] As described above, the bevel gear 6 can be rotated to drive the printing assembly 8 at the edge of the bevel gear 6 to maintain a vertical state and move around the center of the bevel gear 6, thereby achieving the purpose of switching the printing assembly 8. By inputting different colors of ink on different printing assemblies 8 and matching different screen 84 patterns, a multi-color printing process is realized.

[0040] like Figure 3 , Figure 4 As shown, in order to enable the scraper 810 and the ink return knife 811 to move in the horizontal direction, so as to fill the screen 84 with ink, the present application is provided with a column 9 on one side of the frame 1. A crossbeam 10 is arranged on the column 9. A printing frame 11 is slidably connected to the crossbeam 10. A printing motor 12 (such as Figure 5 As shown). The printing motor 12 is connected to the printing frame 11 through a belt. A printing cylinder 13 is connected to one side of the printing frame 11. A clamp 14 is connected to the output end of the printing cylinder 13. The clamp 14 can be clamped pneumatically or connected to the sliding frame 87 by magnetic attraction. When the printing component 8 rotates to the lowest point, it is set just corresponding to the printing platform 2. At this time, under the action of cylinder 1 88 and cylinder 2 89, the scraper 810 and the ink return knife 811 reach the position of the screen 84, and the printing cylinder 13 drives the clamp 14 to clamp the sliding frame 87, and drives the printing frame 11 and the printing cylinder 13 to move in the horizontal direction through the printing motor 12, so that the scraper 810 moves, drives the ink to cover the screen 84, and transfers the pattern to the packaging bag. After the scraper 810 and the ink return knife 811 move back and forth on the screen 84 once, the clamp 14 is reset.

[0041] like Figure 5 As shown, for the technical purpose of driving the bevel gear 6 to rotate step by step. The present application connects a transmission belt 15 to one end of the driving shaft 5. The transmission belt 15 is connected to a stepping motor 16. The stepping motor 16 rotates to drive the transmission belt 15 to move, thereby driving the bevel gear 6 to rotate step by step. When the bevel gear 6 rotates step by step, the printing assembly 8 can be switched, so that after the printing assembly 8 is finished printing, it is switched to another printing assembly 8 for subsequent printing processes of different colors.

[0042] In the prior art, when faced with a large number of printing jobs, the screen printing equipment needs to frequently add ink of the corresponding color to the screen 84. When the pattern is rich in color, the operator often needs to add ink to each screen printing equipment, which increases the workload.

[0043] like Figure 5 As shown, in order to achieve the technical purpose of automatically adding ink to each printing component 8 accurately. The present application is provided with a rotating shaft 17 on the fixed frame 3. A driven wheel 18 meshing with the bevel gear 6 is connected to the top of the rotating shaft 17. The same number of support columns 19 as the printing components 8 are arranged around the center of the driven wheel 18 on the top of the driven wheel 18. A support plate 20 is arranged on the top of the support column 19. A syringe 21 is fixedly penetrated at one end of the support plate 20. An injection head 22 is arranged at the bottom of the syringe 21. In the initial state, different colors of ink are injected into different syringes 21.

[0044] Correspondingly, a piston 23 is slidably connected in the injection cylinder 21. A pressing rod 24 is connected to the top of the piston 23. A pressing cylinder 25 is connected to the middle bearing of the driven wheel 18. A pressing plate 26 is connected to the output end of the pressing cylinder 25. The pressing plate 26 is directly opposite to the top of the pressing rod 24 near one side of the frame 1.

[0045] As mentioned above, when the pressing cylinder 25 works, the pressing plate 26 moves downward to apply external pressure to the pressing rod 24. Under the action of external force, the ink is squeezed out from the injection cylinder 21 and enters the screen 84 directly below to realize the feeding process.

[0046] Overall working process:

[0047] 1. Adjust the positions of the scraper 810 and the ink return knife 811 accordingly, and install each screen 84 on the screen clamping frame 82 and fix them with bolts;

[0048] 2. Place the packaging bag or film roll to be printed on the printing platform 2; the cylinder 1 88 and the cylinder 2 89 work, driving the scraper 810 and the ink return knife 811 to the position of the screen 84; the printing cylinder 13 works, so that the clamping claw 14 reaches the position of the sliding frame 87 to clamp the sliding frame 87. The printing motor 12 works, and the clamping claw 14 drives the scraper 810 and the ink return knife 811 corresponding to the sliding frame 87 to move back and forth once, so that the ink on the screen 84 is transferred to the packaging bag, completing the first monochrome pattern printing;

[0049] 3. Irradiate the packaging bag with ultraviolet light to solidify the ink pattern. After that, the stepper motor 16 works to drive the drive shaft 5 to step by a certain angle. In this application, four printing components 8 are set, so it is 90 degrees. The bevel gear 6 rotates 90 degrees, so that another printing component 8 reaches the top of the packaging bag for the second printing;

[0050] 4. When the bevel gear 6 rotates and the printing assembly 8 is switched, the driven wheel 18 meshing with the bevel gear 6 rotates 90 degrees, so that the other syringe 21 reaches the top of the printing assembly 8. The pressing cylinder 25 works, driving the pressing plate 26 to press down, applying external pressure to the pressing rod 24, so that the ink of the corresponding color is squeezed from the syringe 21 into the screen 84, achieving the effect of automatically adding ink;

[0051] 5. Repeat steps 1-4 to cover the packaging bags with patterns of different colors, completing the complex printing process of the packaging bags. At the same time, the screen printing equipment that was originally only capable of monochrome printing is transformed into a multi-color printing process, reducing the use area and equipment costs, and solving the problem of operators frequently adding ink during mass production, reducing the harm of VOC (volatile organic compounds) emitted by ink to the human body, and improving production efficiency.

[0052] This specific embodiment is merely an explanation of the present invention and is not a limitation of the present invention. After reading this specification, those skilled in the art may make non-creative modifications to the present embodiment as needed. However, as long as they are within the scope of the claims of the present invention, they are protected by the patent law.

Claims

1. A food packaging bag printing machine, characterized in that: include: A frame (1), wherein a printing platform (2) is arranged on the frame (1); A fixing frame (3) is arranged on one side of the frame (1), and a mounting plate (4) extends from one side of the fixing frame (3); A drive shaft (5), the bearing of which is connected to the mounting plate (4); A bevel gear (6) fixedly connected to one end of the drive shaft (5); A transmission belt (15) connected to one end of the driving shaft (5); A stepping motor (16) connected to the transmission belt (15); A plurality of positioning seats (7) are arranged around the center of the bevel gear (6) and are hinged to the bevel gear (6); A plurality of printing components (8) are respectively arranged on one side of the positioning seat (7); When the stepping motor (16) drives the driving shaft (5) to rotate step by step, the bevel gear (6) is driven to rotate step by step, thereby switching the printing components (8) with different color inks; Also includes: A rotating shaft (17) is arranged on the fixing frame (3); A driven wheel (18), connected to the top of the rotating shaft (17) and meshing with the bevel gear (6); A plurality of support columns (19) are arranged around the center of the driven wheel (18) and on the top of the driven wheel (18); A support plate (20) is arranged on the top of the support column (19); An injection cylinder (21) is fixedly mounted on one end of the support plate (20), and an injection head (22) is disposed at the bottom of the injection cylinder (21); A piston (23) is slidably connected in the injection cylinder (21); A pressing rod (24), connected to the top of the piston (23); A pressing cylinder (25) having a bearing connected to the middle of the driven wheel (18); A pressing plate (26) connected to the output end of the pressing cylinder (25); The number of the support columns (19) is the same as the number of the printing components (8); When the bevel gear (6) rotates and the printing assembly (8) is switched, the driven wheel (18) meshing with the bevel gear (6) rotates 90 degrees, so that the other injection cylinder (21) reaches the top of the printing assembly (8).

2. A food packaging bag printing machine according to claim 1, characterized in that: The printing assembly (8) comprises: A net clamping fixing plate (81) is arranged at the bottom of the positioning seat (7); A net clamping frame (82) is arranged on one side of the net clamping fixing plate (81); A screen (84) is connected between the two screen clamping frames (82) by bolts; A guide rail (85) is arranged between the two clamping net fixing plates (81); A sliding seat (86) is slidably disposed on the guide rail (85); A sliding frame (87) connected to the sliding seat (86); Cylinder 1 (88) and cylinder 2 (89) are arranged on the top of the sliding frame (87); A scraper (810) connected to the bottom of the output rod of the cylinder (88); The ink return knife (811) is connected to the bottom of the output rod of the second cylinder (89).

3. A food packaging bag printing machine according to claim 2, characterized in that: Also includes: A column (9) is arranged on one side of the frame (1); A crossbeam (10) is transversely arranged on the column (9); A printing frame (11) is slidably connected to the crossbeam (10); A printing motor (12) is arranged on one side of the crossbeam (10) and is connected to the printing frame (11) via a belt; A printing cylinder (13), connected to one side of the printing frame (11); The clamping claw (14) is connected to the output end of the printing cylinder (13).

4. A food packaging bag printing machine according to claim 2, characterized in that: The net clamping fixing plate (81) and the net clamping frame (82) are both provided with two, and a connecting rod (83) is fixedly connected between the two net clamping fixing plates (81).

5. The food packaging bag printing machine according to claim 2, characterized in that: The cylinder one (88) and the cylinder two (89) are both provided with bolts capable of adjusting the positions of the scraper (810) and the ink return knife (811).

6. A food packaging bag printing machine according to claim 3, characterized in that: The clamping claw (14) is connected to the sliding frame (87) by pneumatic means or magnetic means.

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