Improved plastic bag printing device

Abstract

The utility model relates to the technical field of plastic bag printing devices, and discloses an improved plastic bag printing device which comprises an equipment shell, a conveyor is installed in the equipment shell, a printing assembly is arranged on the upper side of the conveyor, two adjusting electric push rods are arranged in the feeding direction and the discharging direction of the conveyor respectively, and the adjusting electric push rods are arranged in the feeding direction and the discharging direction of the conveyor respectively. The two adjusting electric push rods are fixedly mounted in the equipment shell, the output end of each adjusting electric push rod faces the center of the equipment shell, and a roller mounting seat is fixedly mounted at the output end of each adjusting electric push rod; two rollers are pulled to move towards the outside of an equipment shell through adjusting electric push rods located on the two sides of a feeding part, the surface of a plastic bag is grabbed through a structure for increasing the grabbing force, the two sides of the plastic bag can be straightened, and the wrinkling phenomenon is avoided; and a structure for increasing the grabbing force is arranged on the roller, so that the device can continuously work in the moving process of the plastic bag.

Description

Technical Field

[0001] The utility model relates to the technical field of plastic bag printing devices, in particular to an improved plastic bag printing device. Background Technique

[0002] Plastic packaging bags are one of the essential daily necessities in people's daily lives. With the continuous improvement of people's material living standards, the demand for plastic packaging bags is also increasing day by day. Various prints on plastic packaging bags can not only enhance the beauty of plastic packaging bags but also make it easier to identify different types, functions, and manufacturers. Therefore, printing on plastic bags is an essential processing step in the plastic bag production process.

[0003] In the prior art, a printing device with the authorized publication number of CN218876617U includes support columns. The top of the support columns is fixed with side plates. A conveying device body is rotatably arranged in the inner cavity of the side plates. The top of the side plates is fixed with a top shell. The surface of the top shell is fixed with a first machine shell. A lifting mechanism is fixed in the inner cavity of the first machine shell. A dust removal plate is fixed on the surface of the lifting mechanism. A brush body is fixed on the surface of the dust removal plate. An electric push rod is fixed on one side of the inner cavity of the top shell. When printing on a plastic bag, the pressing block will first press on the surface of the plastic bag. Then, the operator can use the adjusting mechanism to move the two pressing blocks to both sides. Under the action of the pressing blocks, the plastic bag is tightened, facilitating the printing head body to print on the surface of the plastic bag. The operator can also use the brush body to simply remove dust from the surface of the plastic bag to avoid the influence of dust on the printing effect of the plastic bag.

[0004] In the above technical solution, a conveyor is needed to transport the plastic bag during printing, and wrinkles may occur to the plastic belt during transportation, which will have an adverse effect on printing. For this reason, we propose an improved plastic bag printing device. Content of the Utility Model

[0005] The utility model provides an improved plastic bag printing device, which solves the technical problem that a conveyor is needed to transport the plastic bag during printing, and wrinkles may occur to the plastic belt during transportation, which will have an adverse effect on printing.

[0006] To solve the above technical problems, an improved plastic bag printing device provided by the utility model includes an equipment housing. A conveyor is installed inside the equipment housing. A printing assembly is arranged above the conveyor. Two adjusting electric push rods are arranged in both the feeding and discharging directions of the conveyor. Both of the two adjusting electric push rods are fixedly installed inside the equipment housing. The output end of each adjusting electric push rod is arranged towards the center of the equipment housing. A roller mounting seat is fixedly installed at the output end of each adjusting electric push rod. A roller is rotatably installed on the roller mounting seat. A structure for increasing the grasping force is arranged on the roller.

[0007] As a further technical solution of the utility model, the structure for increasing the grasping force includes an air cavity arranged at the center inside the roller and a rotating joint installed at the center of the outer surface of the roller. One end of the rotating joint is communicated with the inside of the air cavity, and the other end of the rotating joint is fixedly connected with a fixed hard tube. The fixed hard tube is fixed on the roller mounting seat through a bracket. The end of the fixed hard tube is connected with a negative pressure system.

[0008] As a further technical solution of the utility model, the structure for increasing the grasping force further includes an annular groove formed around the outer wall of the roller. A plurality of connecting pipes are fixedly installed inside the annular groove. The end of the connecting pipe extends into the air cavity. A suction cup is fixedly installed at one end of the connecting pipe located inside the annular groove. The grasping part of the suction cup is arranged outside the annular groove.

[0009] As a further technical solution of the utility model, a tapered groove is arranged on the inner wall of the connecting pipe. The inner diameter of the tapered groove gradually expands from the top to the bottom. The inner diameters of the top and bottom of the tapered groove are both larger than the inner diameter of the connecting pipe. A sealing member is movably installed inside the tapered groove. The outer diameter of the sealing member is equal to the inner diameter of the top end of the tapered groove.

[0010] As a further technical solution of the utility model, a sealing plug is fixedly installed on the upper surface of the sealing member. The outer diameter of the sealing plug is equal to the inner diameter of the connecting pipe and is movably installed inside the connecting pipe. The top end of the sealing plug extends upwards to the upper side of the suction cup and is fixedly connected with a connecting block. A plurality of air inlet grooves are formed on the outer wall of the sealing plug. The upper and lower ends of the air inlet grooves extend to the connecting block and the sealing member respectively.

[0011] As a further technical solution of the utility model, a return spring is fixedly installed on the lower surface of the sealing member. The lower end of the return spring is installed on the bottom surface of the tapered groove.

[0012] As a further technical solution of the utility model, the structure for increasing the grasping force further includes a rubber ring fixedly sleeved on the outer peripheral surface of the roller. A plurality of annular protrusions are integrally formed on the outer surface of the rubber ring.

[0013] As a further technical solution of the present utility model, lifting electric push rods are arranged at both ends on the upper side of the printing assembly. The outer walls of the lifting electric push rods are fixed inside the equipment housing, and the output ends of the lifting electric push rods are connected to the printing assembly.

[0014] Compared with the related art, an improved plastic bag printing device provided by the present utility model has the following beneficial effects:

[0015] 1. For an improved plastic bag printing device, during use, the adjusting electric push rods located on both sides of the feeding part pull the two rollers to move towards the outside of the equipment housing, and the surface of the plastic bag is grabbed through a structure that increases the grabbing force, so that both sides of the plastic bag can be straightened to avoid wrinkling.

[0016] 2. For an improved plastic bag printing device, by arranging a structure that increases the grabbing force on the rollers, it can continuously work during the movement of the plastic bag, ensuring the continuity of plastic bag processing and improving the processing efficiency. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 It is a schematic diagram of the overall structure of an improved plastic bag printing device;

[0018] Figure 2 It is Figure 1 an enlarged schematic diagram of part A in

[0019] Figure 3 a schematic diagram of the structure of the roller of an improved plastic bag printing device;

[0020] Figure 4 It is Figure 3 a schematic diagram of the cross-section taken along B-B in

[0021] Figure 5 It is Figure 4 an enlarged schematic diagram of part C in

[0022] Figure 6 a schematic diagram of the structure of the second embodiment of an improved plastic bag printing device.

[0023] Reference numerals in the figures: 1. Equipment housing; 2. Conveyor; 3. Printing assembly; 31. Lifting electric push rod; 4. Adjusting electric push rod; 5. Roller mounting seat; 6. Roller; 7. Structure for increasing grabbing force; 71. Rotating joint; 72. Fixed rigid tube; 73. Annular groove; 74. Air cavity; 75. Connecting tube; 76. Suction cup; 77. Conical groove; 78. Sealing plug; 79. Sealing member; 81. Return spring; 82. Air inlet groove; 83. Connecting block; 84. Rubber ring; 85. Annular protrusion. DETAILED DESCRIPTION OF THE EMBODIMENTS

[0024] The technical solutions in the embodiments of the present utility model will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present utility model. Obviously, the described embodiments are only a part of the embodiments of the present utility model, rather than all the embodiments. All other embodiments obtained by those of ordinary skill in the art based on the embodiments of the present utility model without creative efforts shall fall within the protection scope of the present utility model.

[0025] Embodiment 1 is given by Figures 1-6 A modified plastic bag printing device of the present utility model includes an equipment housing 1. A conveyor 2 is installed inside the equipment housing 1. A printing assembly 3 is arranged above the conveyor 2. Two adjusting electric push rods 4 are arranged in both the feeding and discharging directions of the conveyor 2. The two adjusting electric push rods 4 are fixedly installed inside the equipment housing 1. The output end of each adjusting electric push rod 4 faces the center of the equipment housing 1. A roller mounting seat 5 is fixedly installed at the output end of each adjusting electric push rod 4. A roller 6 is rotatably installed on the roller mounting seat 5. A structure 7 for increasing the grasping force is arranged on the roller 6. During use, the two rollers 6 are pulled by the adjusting electric push rods 4 located on both sides of the feeding part to move towards the outside of the equipment housing 1, and the surface of the plastic bag is grasped by the structure 7 for increasing the grasping force, so that both sides of the plastic bag can be straightened to avoid wrinkling.

[0026] In this embodiment, the structure 7 for increasing the gripping force includes an air cavity 74 arranged at the center of the roller 6 and a rotating joint 71 installed at the center of the outer surface of the roller 6, one end of the rotating joint 71 is connected to the inside of the air cavity 74, and the other end of the rotating joint 71 is fixedly connected to a fixed hard pipe 72, which is fixed to the roller mounting seat 5 through a bracket, and the end of the fixed hard pipe 72 is connected to a negative pressure system. The structure 7 for increasing the gripping force also includes an annular groove 73 arranged around the outer wall of the roller 6, a plurality of connecting pipes 75 are fixedly installed inside the annular groove 73, and the end of the connecting pipe 75 extends to the inside of the air cavity 74, and a suction cup 76 is fixedly installed at one end of the connecting pipe 75 located inside the annular groove 73, and the gripping portion of the suction cup 76 is arranged on the outside of the annular groove 73, and a conical groove 77 is arranged on the inner wall of the connecting pipe 75, and the inner diameter of the conical groove 77 gradually expands from the top to the bottom, and the inner diameters of the top and bottom of the conical groove 77 are both larger than the inner diameter of the connecting pipe 75. A sealing member 79 is movably mounted inside the conical groove 77, and the outer diameter of the sealing member 79 is equal to the inner diameter of the top end of the conical groove 77. A sealing plug 78 is fixedly mounted on the upper surface of the sealing member 79, and the outer diameter of the sealing plug 78 is equal to the inner diameter of the connecting pipe 75 and is movably mounted inside the connecting pipe 75. The top end of the sealing plug 78 movably extends to the upper side of the suction cup 76 and is fixedly connected to a connecting block 83. A plurality of air inlet grooves 82 are formed on the outer wall of the sealing plug 78, and the upper and lower ends of the air inlet grooves 82 extend to the connecting block 83 and the sealing plug 78, respectively. At the sealing member 79, during use, the negative pressure system can make the inside of the air cavity 74 a negative pressure state. When the roller 6 rolls and contacts the surface of the plastic bag, the thrust generated by the contact pushes the connecting block 83, the sealing plug 78 and the sealing member 79 to move toward the bottom of the conical groove 77. When the sealing member 79 moves to the middle of the conical groove, the suction cup 76 is connected to the inside of the air cavity 74 through the connecting tube 75 and the conical groove 77, so that the suction cup 76 generates negative pressure suction to grab the plastic bag.

[0027] In this embodiment, a return spring 81 is fixedly installed on the lower surface of the seal 79, and the lower end of the return spring 81 is installed on the bottom surface of the tapered groove 77. When the roller 6 rolls, the resistance force of the connecting block 83 disappears, and the return spring 81 pushes the connecting block 83, the sealing plug 78 and the sealing member 79 to move and reset, thereby isolating the top of the tapered groove 77 and closing the connection state, thereby eliminating the negative pressure. During the movement of the connecting block 83, the sealing plug 78 and the sealing member 79, the plastic bag is pushed away by the movement of the connecting block 83.

[0028] In this embodiment, lifting electric push rods 31 are provided at both ends of the upper side of the printing component 3. The outer wall of the lifting electric push rod 31 is fixed inside the equipment casing 1. The output end of the lifting electric push rod 31 is connected to the printing component 3. The printing component 3 includes a mounting frame and a printing roller at the bottom. An ink box is installed on the upper side of the printing roller. The output end of the lifting electric push rod 31 is fixedly connected to the mounting frame, which can drive the printing component 3 to rise and fall and adjust its position.

[0029] Embodiment 2

[0030] Please refer to Figure 6 , the structure 7 for increasing the grasping force further includes a rubber ring 84 fixedly sleeved on the outer peripheral surface of the roller 6. A plurality of annular protrusions 85 are integrally formed on the outer surface of the rubber ring 84. During use, the rubber ring 84 and the annular protrusions 85 on the outer wall can increase the friction force, so as to cooperate with the movement of the roller 6 to grasp the plastic bag.

[0031] The working principle of the present utility model: During use, the adjusting electric push rods 4 located on both sides of the feeding part pull the two rollers 6 to move towards the outside of the equipment casing 1, and the surface of the plastic bag is grasped by the structure 7 for increasing the grasping force, so that both sides of the plastic bag can be straightened to avoid wrinkling;

[0032] By providing the structure 7 for increasing the grasping force on the roller 6, it can continuously work during the movement of the plastic bag.

[0033] Finally, it should be noted that the above are only the preferred embodiments of the present utility model and are not used to limit the present utility model. Although the present utility model has been described in detail with reference to the foregoing embodiments, for those skilled in the art, they can still modify the technical solutions recorded in the foregoing embodiments, or perform equivalent replacements for some of the technical features. Any modifications, equivalent replacements, improvements, etc. made within the spirit and principle of the present utility model shall be included in the protection scope of the present utility model.

Claims

1. An improved plastic bag printing device, comprising an equipment housing (1), characterized in that: Inside the device housing (1), a conveyor (2) is installed. Above the conveyor (2), a printing assembly (3) is provided. At both the feeding and discharging directions of the conveyor (2), two adjusting electric push rods (4) are provided. Both of the two adjusting electric push rods (4) are fixedly installed inside the device housing (1), and the output end of each adjusting electric push rod (4) is directed towards the center of the device housing (1). At the output end of each adjusting electric push rod (4), a roller mounting seat (5) is fixedly installed. The roller mounting seat (5) is rotatably installed with a roller (6), and a structure (7) for increasing the grasping force is provided on the roller (6).

2. The improved plastic bag printing device according to claim 1, wherein, The structure (7) for increasing the grasping force includes an air cavity (74) provided at the center inside the roller (6) and a rotating joint (71) installed at the center of the outer surface of the roller (6). One end of the rotating joint (71) is communicated with the inside of the air cavity (74), and the other end of the rotating joint (71) is fixedly connected with a fixed rigid tube (72). The fixed rigid tube (72) is fixed on the roller mounting seat (5) through a bracket, and the end of the fixed rigid tube (72) is connected with a negative pressure system.

3. The improved plastic bag printing device according to claim 2, wherein, The structure (7) for increasing the grasping force further includes an annular groove (73) formed around the outer wall of the roller (6). A plurality of connecting tubes (75) are fixedly installed inside the annular groove (73). The end of the connecting tube (75) extends into the air cavity (74) internally. One end of the connecting tube (75) located inside the annular groove (73) is fixedly installed with a suction cup (76), and the grasping part of the suction cup (76) is arranged outside the annular groove (73).

4. An improved plastic bag printing device according to claim 3, characterized in that, A tapered groove (77) is provided on the inner wall of the connecting tube (75). The inner diameter of the tapered groove (77) gradually expands from the top to the bottom. The inner diameters of the top and bottom of the tapered groove (77) are both larger than the inner diameter of the connecting tube (75). A seal (79) is movably installed inside the tapered groove (77), and the outer diameter of the seal (79) is equal to the inner diameter of the top end of the tapered groove (77).

5. The improved plastic bag printing device according to claim 4, characterized in that, On the upper surface of the seal (79), a sealing plug (78) is fixedly installed. The outer diameter of the sealing plug (78) is equal to the inner diameter of the connecting tube (75) and is movably installed inside the connecting tube (75). The top end of the sealing plug (78) extends upwardly and is movably connected with a connecting block (83) above the suction cup (76). A plurality of air inlet grooves (82) are formed on the outer wall of the sealing plug (78), and the upper and lower ends of the air inlet grooves (82) extend to the connecting block (83) and the seal (79) respectively.

6. The improved plastic bag printing device according to claim 4, characterized in that, On the lower surface of the seal (79), a return spring (81) is fixedly installed. The lower end of the return spring (81) is installed on the bottom surface of the tapered groove (77).

7. An improved plastic bag printing device according to claim 1, characterized in that, The structure (7) for increasing the grasping force further includes a rubber ring (84) fixedly sleeved on the outer peripheral surface of the roller (6). A plurality of annular protrusions (85) are integrally formed on the outer surface of the rubber ring (84).

8. An improved plastic bag printing device according to claim 1, characterized in that, Lifting electric push rods (31) are arranged at both upper ends of the printing component (3). The outer walls of the lifting electric push rods (31) are fixed inside the equipment housing (1), and the output ends of the lifting electric push rods (31) are connected to the printing component (3).

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