Protection mechanism for bag making machine

Abstract

The utility model discloses a protection mechanism for a bag making machine, and belongs to the technical field of packaging bag production and processing, the protection mechanism comprises a printing mechanism, a dye groove is formed in the printing mechanism, and a rotating rod is rotationally connected to the inner wall of the printing mechanism and located above the dye groove; the driving unit drives the rotating rod to rotate so that the printing roller can be driven to rotate to conduct packaging bag printing work, and through cooperation between the rotating rod and an eccentric wheel, the rotating rod can drive the eccentric wheel to periodically extrude the inflating unit when rotating; therefore, air can be inflated into the expansion air bag through the inflation unit, so that the volume of the expansion air bag is gradually increased due to air expansion, the storage amount of dye in the dye tank is gradually reduced due to printing work, but the liquid level of the dye is prevented from falling due to the fact that the volume of the expansion air bag is continuously increased. The printing roller can be in full contact with dye all the time, and it is guaranteed that the printing effect cannot become poor.

Description

Technical Field

[0001] The present application relates to the technical field of packaging bag production and processing, and in particular to a protective mechanism for a bag-making machine. Background Art

[0002] Packaging bags are bags used to package various items, making them easier to transport and store during production and distribution. Bag-making machines are used to produce various plastic bags or bags made of other materials. Packaging bags are widely used in daily life and industrial production. To facilitate everyday memory, they are often printed on the outside of the bags during production and processing for promotional purposes.

[0003] The published patent document with the announcement number CN217553416U provides a packaging bag printing device that prevents dye splashing. This published patent document sets a sealing plate and a splash-proof plate to play a shielding role, thereby achieving the purpose of preventing dye splashing; however, during the printing process of the packaging bag, it is inconvenient to add dye to the dye tank in the middle, so that the amount of dye in the dye tank will gradually decrease, the liquid level of the dye will gradually decrease, and the printing roller will be exposed to less and less dye, which will lead to a worse printing effect. Utility Model Content

[0004] In response to the shortcomings of the existing technology, the present application provides a protective mechanism for a bag making machine, which overcomes the shortcomings of the existing technology and aims to solve the problem that it is inconvenient to add dye to the dye tank during the printing process of packaging bags, so that the amount of dye in the dye tank will gradually decrease, the liquid level of the dye will gradually decrease, and the printing roller will be in contact with less and less dye, thereby resulting in poor printing effect.

[0005] To achieve the above-mentioned purpose, the present application provides the following technical solutions: a protective mechanism for a bag-making machine, comprising a printing mechanism, wherein a dye trough is provided inside the printing mechanism, the inner wall of the printing mechanism is located above the dye trough and is rotatably connected to a rotating rod, and a driving unit fixedly connected to one end of the rotating rod is fixedly installed on the outer wall of one side of the printing mechanism, the other end of the rotating rod extends through the printing mechanism to the outside and is fixedly sleeved with an eccentric wheel, the outer surface of the rotating rod is located inside the dye trough and is fixedly connected to a printing roller, an air pumping unit is provided on the other side of the printing mechanism below the eccentric wheel, and an inflation air bag connected to the air pumping unit is placed on the inner bottom wall of the dye trough.

[0006] By adopting the above technical solution, the driving unit drives the rotating rod to rotate, so as to drive the printing roller to rotate and perform packaging bag printing. Through the cooperation between the rotating rod and the eccentric wheel, the rotating rod will drive the eccentric wheel to periodically squeeze the inflation unit when rotating, so that the inflation unit can inflate the interior of the inflation airbag so that the volume of the inflation airbag gradually increases due to the expansion of the gas. The amount of dye in the dye tank will gradually decrease as the printing work progresses, but the liquid level of the dye will avoid falling due to the continuous increase in the volume of the inflation airbag, so that the printing roller can always be in full contact with the dye, ensuring that the printing effect will not deteriorate.

[0007] As a preferred technical solution of the present application, the inflation unit includes a fixed frame, the upper surface of the fixed frame is arranged in an arc shape and is fixedly connected to an extrusion inflatable airbag, the extrusion inflatable airbag is communicated with the expansion airbag, and the upper surface of the fixed frame is located on both sides of the extrusion inflatable airbag and is fixedly installed with positioning rods, the outer surface of the positioning rod is slidably sleeved with a movable frame near the upper end position, the bottom of the movable frame is fixedly connected to the top of the fixed frame by a spring, and the lower surface of the movable frame is fixedly installed with an extrusion block.

[0008] By adopting the above technical solution, the movable frame moves downward under the squeezing action of the eccentric wheel, driving the squeezing block to move downward to squeeze the squeezed inflatable airbag, so that the squeezed inflatable airbag can inflate air into the expansion airbag. When the eccentric wheel no longer squeezes the movable frame, the movable frame returns to its original position under the action of the spring, and the squeezed inflatable airbag will also return to its original state and wait for the next inflation.

[0009] As a preferred technical solution of the present application, the extruded inflatable airbag, the movable frame, the extrusion block and the eccentric wheel are all in the same vertical plane.

[0010] By adopting the above technical solution, it is ensured that the movable frame and the extrusion block can extrude the extrusion inflatable airbag under the action of the eccentric wheel.

[0011] As a preferred technical solution of the present application, a partition is fixedly installed inside the dye tank above the expansion airbag, and a plurality of overflow holes are opened through the upper surface of the partition.

[0012] By adopting the above technical solution, the expansion airbag is limited by setting a partition to prevent the expansion airbag from contacting the printing roller, and the overflow hole is set to ensure that the dye can pass through the partition smoothly.

[0013] As a preferred technical solution of the present application, the driving unit includes a mounting base fixedly mounted on an outer wall of one side of the printing mechanism, a driving motor is fixedly mounted on the top of the mounting base, and a support block is fixedly mounted on the bottom of the mounting base.

[0014] By adopting the above technical solution, the mounting seat plays a role of limiting and fixing, thereby preventing the driving motor from shaking during operation, and the support block plays a role of reinforcing support.

[0015] As a preferred technical solution of the present application, a sealing cover is fixedly mounted on the upper surface of the printing mechanism by mounting bolts, and the printing roller is located inside the sealing cover.

[0016] By adopting the above technical solution, the sealing cover can play a shielding role, thereby achieving the purpose of preventing the dye from splashing out.

[0017] As a preferred technical solution of the present application, a splash plate is fixedly connected to the side of the sealing cover close to the printing roller, and the splash plate is arranged in an arc shape on the side facing the printing roller.

[0018] By adopting the above technical solution, the splash-proof plate is provided to further increase the protection area and further prevent the dye from splashing out.

[0019] As a preferred technical solution of the present application, a pressure roller is provided directly above the printing roller, and both ends of the pressure roller are fixedly mounted on the inner wall of the printing mechanism.

[0020] By adopting the above technical solution, the packaging bag is printed through the cooperation between the printing roller and the pressing roller.

[0021] Beneficial effects of this application:

[0022] In the present invention, the driving unit drives the rotating rod to rotate so as to drive the printing roller to rotate and perform the packaging bag printing work. Through the cooperation between the rotating rod and the eccentric wheel, the rotating rod drives the eccentric wheel to periodically squeeze the inflation unit when rotating, so that the inflation unit can inflate the interior of the inflation airbag so that the volume of the inflation airbag gradually increases due to the expansion of the gas. The stock of dye in the dye tank will gradually decrease as the printing work progresses, but the liquid level of the dye will avoid falling due to the continuous increase in the volume of the inflation airbag, so that the printing roller can always be in full contact with the dye, ensuring that the printing effect will not deteriorate.

[0023] With reference to the following description and drawings, specific embodiments of the present invention are disclosed in detail, indicating the manner in which the principles of the present invention may be employed. It should be understood that the scope of the embodiments of the present invention is not limited thereby. BRIEF DESCRIPTION OF THE DRAWINGS

[0024] Figure 1 This is a schematic diagram of the overall structure of this application;

[0025] Figure 2 This is a schematic diagram of the split structure of this application;

[0026] Figure 3 This is a schematic side cross-sectional view of the present application;

[0027] Figure 4 This is a schematic diagram of the composition structure of the inflation unit of this application.

[0028] In the figure: 1. Printing mechanism; 2. Dye tank; 3. Rotating rod; 4. Printing roller; 5. Driving unit; 501. Driving motor; 502. Mounting seat; 503. Support block; 6. Eccentric wheel; 7. Inflating unit; 701. Fixed frame; 702. Extrusion inflatable airbag; 703. Positioning rod; 704. Spring; 705. Movable frame; 706. Extrusion block; 8. Inflatable airbag; 9. Partition; 10. Overflow hole; 11. Pressing roller; 12. Sealing cover; 13. Mounting bolt; 14. Splash plate. DETAILED DESCRIPTION

[0029] The following will clearly and completely describe the technical solutions in the embodiments of the present application in conjunction with the drawings in the embodiments of the present application. Obviously, the described embodiments are only part of the embodiments of the present application rather than all the embodiments. Based on the embodiments in the present application, all other embodiments obtained by ordinary technicians in this field without making creative work are within the scope of protection of this application.

[0030] like Figure 1 - Figure 4 As shown, the present embodiment provides a protective mechanism for a bag making machine, comprising a printing mechanism 1, wherein a dye tank 2 is provided inside the printing mechanism 1, an inner wall of the printing mechanism 1 is located above the dye tank 2 and is rotatably connected to a rotating rod 3, and a driving unit 5 fixedly installed on an outer wall of one side of the printing mechanism 1 and fixedly connected to one end of the rotating rod 3, the other end of the rotating rod 3 passes through the printing mechanism 1 and extends to the outside and is fixedly sleeved with an eccentric wheel 6, the outer surface of the rotating rod 3 is located inside the dye tank 2 and is fixedly connected to a printing roller 4, an air pumping unit 7 is provided on the other side of the printing mechanism 1 below the eccentric wheel 6, and an expansion joint connected to the air pumping unit 7 is placed on the inner bottom wall of the dye tank 2. When the inflatable bag 8 is in use, the driving unit 5 drives the rotating rod 3 to rotate, so as to drive the printing roller 4 to rotate and print the packaging bag. Through the cooperation between the rotating rod 3 and the eccentric wheel 6, the rotating rod 3 will drive the eccentric wheel 6 to periodically squeeze the inflation unit 7 when rotating, so that the inflation unit 7 can inflate the interior of the inflatable bag 8 so that the volume of the inflatable bag 8 gradually increases due to the expansion of the gas. The amount of dye in the dye tank 2 will gradually decrease as the printing work progresses, but the liquid level of the dye will avoid falling due to the continuous increase in the volume of the inflatable bag 8, so that the printing roller 4 can always be in full contact with the dye, ensuring that the printing effect will not deteriorate.

[0031] In this embodiment, if Figure 4As shown, the inflating unit 7 includes a fixing frame 701, the upper surface of the fixing frame 701 is arranged in an arc shape and is fixedly connected to an extrusion inflatable airbag 702, the extrusion inflatable airbag 702 is connected to the expansion airbag 8, the upper surface of the fixing frame 701 is located on both sides of the extrusion inflatable airbag 702 and is fixedly installed with a positioning rod 703, the outer surface of the positioning rod 703 is slidably sleeved with a movable frame 705 near the upper end, and the bottom of the movable frame 705 is fixedly connected to the top of the fixing frame 701 through a spring 704 Next, an extrusion block 706 is fixedly installed on the lower surface of the movable frame 705. When in use, the movable frame 705 moves downward under the extrusion of the eccentric wheel 6, driving the extrusion block 706 to move downward to squeeze the extruded inflatable airbag 702, so that the extruded inflatable airbag 702 can pump air into the expansion airbag 8. When the eccentric wheel 6 no longer squeezes the movable frame 705, the movable frame 705 returns to its original position under the action of the spring 704, and the extruded inflatable airbag 702 will also return to its original state and wait for the next inflation.

[0032] In this embodiment, if Figure 1 and 4 As shown, the extrusion inflatable airbag 702, the movable frame 705, the extrusion block 706 and the eccentric wheel 6 are all in the same vertical plane. When in use, it is ensured that the movable frame 705 and the extrusion block 706 can squeeze the extrusion inflatable airbag 702 under the action of the eccentric wheel 6.

[0033] In this embodiment, if Figure 3 As shown, a partition 9 is fixedly installed inside the dye tank 2 above the expansion airbag 8, and a plurality of overflow holes 10 are opened through the upper surface of the partition 9. When in use, the expansion airbag 8 is limited by setting the partition 9 to prevent the expansion airbag 8 from contacting the printing roller 4, and the overflow holes 10 are set to ensure that the dye can pass through the partition 9 smoothly.

[0034] In this embodiment, if Figure 2 As shown, the drive unit 5 includes a mounting base 502 fixedly mounted on an outer wall of one side of the printing mechanism 1, a drive motor 501 is fixedly mounted on the top of the mounting base 502, and a support block 503 is fixedly mounted on the bottom of the mounting base 502. When in use, the mounting base 502 plays a role of limiting and fixing to prevent the drive motor 501 from shaking during operation, and the support block 503 plays a role of reinforcing support.

[0035] In this embodiment, if Figure 2 As shown, a sealing cover 12 is fixedly mounted on the upper surface of the printing mechanism 1 by mounting bolts 13 , and the printing roller 4 is located inside the sealing cover 12 . When in use, the sealing cover 12 can play a shielding role to prevent the dye from splashing out.

[0036] In this embodiment, if Figure 2As shown, a splash plate 14 is fixedly connected to the side of the sealing cover 12 close to the printing roller 4, and the splash plate 14 is arranged in an arc shape on the side facing the printing roller 4. When in use, the splash plate 14 is arranged to further increase the protection area and further prevent the dye from splashing.

[0037] In this embodiment, if Figure 1 and 3 As shown, a pressing roller 11 is provided directly above the printing roller 4. Both ends of the pressing roller 11 are fixedly mounted on the inner wall of the printing mechanism 1. When in use, the packaging bag is printed through the cooperation between the printing roller 4 and the pressing roller 11.

[0038] Working principle: When using a protective mechanism for a bag making machine of the present application, the driving unit 5 drives the rotating rod 3 to rotate so as to drive the printing roller 4 to rotate to print the packaging bags. Through the cooperation between the rotating rod 3 and the eccentric wheel 6, the rotating rod 3 will drive the eccentric wheel 6 to periodically squeeze the pumping unit 7 when rotating, so that the inflation airbag 8 can be inflated through the pumping unit 7 so that the volume of the inflation airbag 8 gradually increases due to the expansion of the gas. The amount of dye in the dye tank 2 will gradually decrease as the printing work progresses, but the liquid level of the dye will avoid falling due to the continuous increase in the volume of the inflation airbag 8, so that the printing roller 4 can always be in full contact with the dye, ensuring that the printing effect will not deteriorate.

[0039] In the description of this utility model, it should be noted that the terms "upper," "lower," "inner," "outer," "front end," "rear end," "two ends," "one end," "the other end," and the like, indicating positions or relationships, are based on the positions or relationships shown in the accompanying drawings and are intended solely to facilitate the description of this utility model and simplify the description. They are not intended to indicate or imply that the devices or components referred to must have a specific orientation, be constructed, or operate in a specific orientation. Therefore, they should not be construed as limitations on this utility model. Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance.

[0040] In the description of this utility model, it should be noted that, unless otherwise expressly specified or limited, the terms "installed," "provided with," "connected," etc., should be understood in a broad sense. For example, "connected" may refer to a fixed connection, a detachable connection, or an integral connection; it may refer to a mechanical connection or an electrical connection; it may refer to a direct connection or an indirect connection through an intermediate medium; it may refer to internal communication between two components. Those skilled in the art will be able to understand the specific meanings of the above terms in this utility model based on specific circumstances.

[0041] The present invention has been described above with reference to specific embodiments. However, those skilled in the art should understand that these descriptions are merely illustrative and are not intended to limit the scope of protection of the present invention. Those skilled in the art may make various modifications and variations to the present invention based on the spirit and principles of the present invention, and such modifications and variations are also within the scope of the present invention.

Claims

1. A protective mechanism for a bag making machine, comprising a printing mechanism (1), characterized in that: A dye tank (2) is provided inside the printing mechanism (1), an inner wall of the printing mechanism (1) is located above the dye tank (2) and is rotatably connected to a rotating rod (3), and a driving unit (5) fixedly installed on an outer wall of one side of the printing mechanism (1) and fixedly connected to one end of the rotating rod (3), the other end of the rotating rod (3) passes through the printing mechanism (1) and extends to the outside and is fixedly sleeved with an eccentric wheel (6), the outer surface of the rotating rod (3) is located inside the dye tank (2) and is fixedly connected to a printing roller (4), an air pumping unit (7) is provided on the other side of the printing mechanism (1) and is located below the eccentric wheel (6), and an expansion air bag (8) connected to the air pumping unit (7) is placed on the inner bottom wall of the dye tank (2).

2. A protective mechanism for a bag making machine according to claim 1, characterized in that: The inflation unit (7) includes a fixed frame (701), the upper surface of the fixed frame (701) is arranged in an arc shape and is fixedly connected to an extrusion-inflatable airbag (702), the extrusion-inflatable airbag (702) is connected to the expansion airbag (8), and the upper surface of the fixed frame (701) is fixedly installed with positioning rods (703) on both sides of the extrusion-inflatable airbag (702), and the outer surface of the positioning rod (703) is slidably sleeved with a movable frame (705) near the upper end position, the bottom of the movable frame (705) is fixedly connected to the top of the fixed frame (701) through a spring (704), and the lower surface of the movable frame (705) is fixedly installed with an extrusion block (706).

3. A protective mechanism for a bag making machine according to claim 2, characterized in that: The extrusion inflatable airbag (702), the movable frame (705), the extrusion block (706) and the eccentric wheel (6) are all located in the same vertical plane.

4. A protective mechanism for a bag making machine according to claim 1, characterized in that: A partition (9) is fixedly installed inside the dye tank (2) above the expansion airbag (8), and a plurality of overflow holes (10) are formed through the upper surface of the partition (9).

5. The protective mechanism for a bag making machine according to claim 1, characterized in that: The driving unit (5) comprises a mounting seat (502) fixedly mounted on an outer wall of one side of the printing mechanism (1), a driving motor (501) fixedly mounted on the top of the mounting seat (502), and a supporting block (503) fixedly mounted on the bottom of the mounting seat (502).

6. The protective mechanism for a bag making machine according to claim 1, characterized in that: A sealing cover (12) is fixedly mounted on the upper surface of the printing mechanism (1) via mounting bolts (13), and the printing roller (4) is located inside the sealing cover (12).

7. A protective mechanism for a bag making machine according to claim 6, characterized in that: A splash plate (14) is fixedly connected to the side of the sealing cover (12) close to the printing roller (4), and the splash plate (14) is arranged in an arc shape on the side facing the printing roller (4).

8. The protective mechanism for a bag making machine according to claim 1, characterized in that: A pressing roller (11) is provided directly above the printing roller (4), and both ends of the pressing roller (11) are fixedly mounted on the inner wall of the printing mechanism (1).

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