A packaging bag repeatedly closed easy-to-tear seal label and a processing device thereof

Abstract

The application is applied to the opening of sanitary products, food packaging bags, medical packaging and the like, and particularly relates to a packaging bag repeated closing and easy-to-tear sealing label and a processing equipment thereof, which comprises a finished bag film, a taking-out port is formed in the middle part of the finished bag film, a film which is adhered to the finished bag film and is arranged in a U shape is arranged outside the taking-out port, a tearable film which is adhered to the finished bag film and is used for opening and closing the taking-out port is arranged on one side of the film opening, and the processing equipment for processing the tearable opening structure of the bagged product further comprises an operation table, electric push rods are fixedly installed on both sides of the operation table, a connecting plate is fixedly installed above the electric push rods, a hollow cavity is formed in the middle part of the operation table, the application effectively avoids the overflow caused by the continuous glue seepage in the idle state, the product contamination problem, the glue supply is stable, the glue layer forming contour is neat, the sealing performance of the subsequent tearable film repeated opening and closing is ensured, and the bag film surface can be automatically cleaned before gluing.

Description

Technical Field

[0001] This invention relates to the field of product packaging bag technology, specifically to a packaging bag with a reversible, easy-to-tear sealing label and its processing equipment. Background Technology

[0002] To facilitate convenient retrieval and reusable sealing of bagged products, the existing traditional tear-open structure involves directly attaching and fixing the tear-off film to the outer periphery of the retrieval port of the finished bag film. In actual use, when operators repeatedly peel and attach the tear-off film, it will directly pull and peel off the finished bag film, which can easily cause the finished bag film to tear, wrinkle, and break. This not only damages the overall appearance of the packaging bag but also causes the retrieval port seal to fail.

[0003] Traditional processing equipment often uses a fixed adhesive coating structure, which cannot achieve precise start-stop adhesive supply. In standby mode, adhesive seepage and overflow are prone to occur, which not only wastes adhesive but also contaminates the bag products, resulting in a low yield rate. At the same time, traditional equipment lacks a dedicated curing auxiliary structure, resulting in slow natural curing of the adhesive layer, low production efficiency, and inability to achieve stable adsorption and positioning of the bag. During the adhesive coating process, the finished bag film is prone to displacement and wrinkling, leading to adhesive position deviation and irregular film formation, which greatly affects the opening and closing accuracy and sealing effect of the tear-openable opening. Summary of the Invention

[0004] The purpose of this invention is to provide a reusable, easy-tear sealing label for packaging bags and its processing equipment, in order to solve the problems mentioned in the background art.

[0005] The objective of this invention can be achieved through the following technical solutions: A reusable and tear-off sealing label for packaging bags includes a finished bag film with an opening in the middle. A U-shaped film is attached to the outside of the opening and a tear-off film is attached to the finished bag film to open and close the opening.

[0006] A processing device for repeatedly closing and tearing easy-to-seal labels on packaging bags includes an operating table. Electric push rods are fixedly installed on both sides of the operating table, and connecting plates are fixedly installed above the electric push rods. A hollow cavity is opened in the middle of the operating table, and an air vent connected to the hollow cavity is provided on the top of the operating table. A stabilizing unit is provided on one side of the operating table to generate adsorption force within the air vent, stabilizing the finished bag film on the operating table for processing. A lifting box is installed between the connecting plates on both sides. An adhesive application unit is detachably installed at the bottom of the lifting box. Cleaning units are also provided on both sides of the lifting box to clean the film before adhesive application. Air blowing units are also provided at the four corners of the bottom of the lifting box to accelerate the curing of the film after adhesive application.

[0007] Preferably, the adhesive application unit includes a U-shaped groove at the bottom of the lifting box, a U-shaped plate detachably installed in the U-shaped groove, a slot on the inner side of the U-shaped plate, a receiving groove at the bottom of the lifting box on one side of the slot, adhesive cotton on the side of the U-shaped plate away from the U-shaped groove, several guide tubes between the U-shaped plate and the adhesive cotton, and a circular groove at the bottom center of the lifting box located inside the U-shaped groove, with a central box fixedly installed in the middle of the circular groove.

[0008] Preferably, a rotating rod is rotatably mounted in the center of the central box, a disc is fixedly mounted in the center of the rotating rod and located inside the central box, an extrusion block is fixedly mounted on the outside of the disc, a crossbar is slidably mounted through the receiving groove on the side of the central box facing the receiving groove, one end of the crossbar inside the central box is spherical, a locking block for engaging the slot is fixedly mounted on the other end of the crossbar, and a spring is sleeved on the outside of the crossbar and located in the circular groove.

[0009] Preferably, the adhesive application unit further includes a storage box located at the center of the upper end face of the lifting box. The top of the storage box is provided with a box cover, and the bottom of the storage box is connected to a bottom groove located inside the lifting box. One side of the bottom groove is provided with a side pipe that is connected to a side pipe and located inside the lifting box. An annular pipe is provided on the outside of the side pipe and is coaxially arranged with it. The side pipe is connected to the annular pipe, and a bent pipe is connected to the annular pipe and the U-shaped groove. A one-way valve is provided at the connection between the annular pipe and the bent pipe.

[0010] Preferably, the annular tube has a cylindrical groove 1 located in the inner cavity of the lifting box on the side away from the bend tube. The cylindrical groove 1 is connected to a cylindrical groove 2 located at the bottom of the lifting box. A piston rod is slidably installed between the cylindrical groove 2 and the cylindrical groove 1. A spring is also provided outside the piston rod in the cylindrical groove 2. A suction tube connected to the annular tube is provided on the side of the cylindrical groove 1 near the cylindrical groove 2.

[0011] Preferably, the cleaning unit includes two sets of rectangular slots respectively opened on both sides of the lifting box. Each set of rectangular slots has a slider slidably installed in it. The slider is equipped with a spring connected to the rectangular slot. The two sliders in each set are rotatably mounted together with a rotating rod. A gear is fixedly installed in the middle of the rotating rod. Both ends of the rotating rod are equipped with symmetrically arranged flipping arm plates. The two flipping arm plates in each set are rotatably mounted together with a cleaning roller.

[0012] Preferably, the cleaning unit further includes a positioning plate located between the two sets of rectangular slots and fixed to the outside of the lifting box. An air cylinder is fixedly installed in the middle of the positioning plate, and a suction rod facing the operating table is slidably installed in the middle of the air cylinder. An end plate is fixedly installed at the bottom of the suction rod. A right-angle plate is installed on each end plate. A toothed plate frame is installed on the end of the right-angle plate on both sides away from the end plate. The toothed plate frames on both sides mesh with gears on both sides respectively.

[0013] Preferably, the blowing unit includes corner blocks installed at the four corners of the bottom of the lifting box, and multiple corner blocks have blowing holes on the side facing the adhesive cotton. The lifting box has a central tube inside, and branch pipes are connected between the central tube and the blowing holes. A connecting pipe connected to the air cylinder is also provided on one side of the central tube.

[0014] Preferably, the stabilizing unit includes an adsorption box, a pressure rod is slidably mounted in the middle of the adsorption box, a connecting pipe connects the adsorption box and the hollow cavity, a spring is sleeved on the outside of the connecting pipe located above the adsorption box, and a squeezing rod connected to the connecting plate is located directly above the pressure rod.

[0015] The beneficial effects of this invention are: 1. This invention relies on pure mechanical linkage to achieve automatic timing coordination of substrate adsorption, surface cleaning, automatic glue supply and application, and glue layer curing by blowing. It does not require additional multiple sets of drive components and timing control systems, simplifies the overall air circuit and electrical control layout, reduces equipment manufacturing costs and fault points, and is suitable for continuous production line processing of roll materials.

[0016] 2. The adhesive application component of this invention can be quickly disassembled and maintained, and can automatically dispense adhesive when pressed down and automatically cut off adhesive when lifted, effectively avoiding the problems of adhesive overflow and product contamination caused by continuous adhesive seepage when idle. The adhesive supply is stable and the adhesive layer has a regular outline, ensuring the sealing performance of the subsequent tearable film that can be repeatedly opened and closed.

[0017] 3. Before applying the adhesive, the present invention can automatically clean the surface of the bag film. The cleaning component has the ability to buffer and avoid, and it is not easy to be damaged by rigid impact during the operation. The curing airflow is directed and concentrated on the adhesive application area, which can not only accelerate the curing and forming of the adhesive layer, but also prevent the airflow from disturbing the position of the bag film and ensure the accuracy of the adhesive application position. Attached Figure Description

[0018] To more clearly illustrate the technical solutions of the embodiments of the present invention, the accompanying drawings used in the description of the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0019] Figure 1 This is a schematic diagram of the product structure of the present invention; Figure 2 This is a schematic diagram of the structure between the operating platform and the lifting box of the present invention; Figure 3 This is a partial cross-sectional view of the operating table of the present invention; Figure 4 This is a schematic diagram of the front structure of the lifting box of the present invention; Figure 5 This is a schematic diagram of the structure of the present invention viewed from below; Figure 6This is a schematic diagram of the bottom structure of the lifting box of the present invention; Figure 7 This is a schematic diagram of the cross-sectional structure of the lifting box of the present invention; Figure 8 This is the present invention. Figure 7 A magnified structural diagram of part A; Figure 9 This is a schematic diagram of the top-section structure of the central tube of the present invention.

[0020] The attached figures are labeled as follows: 1. Finished bag film; 10. Discharge port; 101. Film; 11. Tearable film; 2. Operating table; 200. Hollow cavity; 201. Air outlet; 202. Adsorption box; 203. Pressure rod; 204. Connecting pipe; 205. Extrusion rod; 20. Electric push rod; 21. Connecting plate; 3. Lifting box; 30. U-shaped channel; 31. U-shaped plate; 311. Card slot; 312. Receiving slot; 32. Coated cotton; 33. Circular channel; 34. Central box; 341. Rotating rod; 342. Disc; 343. Extrusion block; 344. Crossbar; 345. Card block; 35. Storage box; 351, box lid; 352, bottom groove; 353, side tube; 354, annular tube; 355, bent tube; 36, cylindrical groove one; 361, cylindrical groove two; 362, piston rod; 363, suction tube; 4, rectangular groove; 41, slider; 42, rotating rod; 43, gear; 44, flip arm plate; 45, cleaning roller; 46, positioning plate; 47, air cylinder; 48, suction rod; 49, end plate; 490, right angle plate; 491, toothed plate frame; 5, corner block; 51, air hole; 52, central tube; 53, branch tube; 54, connecting tube. Detailed Implementation

[0021] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0022] Please see Figure 1-9 As shown, the present invention is an easy-tear sealing label for packaging bags that can be repeatedly closed and opened, including a finished bag film 1. The finished bag film 1 has an opening 10 in the middle. A film 101 in a U-shape is attached to the outside of the opening 10 and is attached to the finished bag film 1. A tearable film 11 is attached to the finished bag film 1 on one side of the opening of the film 101 to open and close the opening 10. It should be noted that the present invention is applied to the opening of hygiene products, food packaging bags, medical packaging and other fields.

[0023] After the film 101 is bonded to the finished bag film 1, the side of the film 101 facing away from the finished bag film 1 can be bonded to the tearable film 11, thereby realizing the reciprocating opening and closing between the tearable film 11 and the dispensing outlet 10. Compared with the existing tearable opening structure of bagged products, the present invention, by bonding the film 101 to the finished bag film 1, ensures that the tearable film 11 is in direct contact with the film 101 when opening and closing with the dispensing outlet 10. Therefore, it effectively avoids the tearable film 11 being pulled directly between the tearable film 11 and the finished bag film 1 when the dispensing outlet 10 is opened, thus preventing damage to the finished bag film 1.

[0024] A processing device for repeatedly closing and tearing easy-to-seal labels on packaging bags includes an operating table 2. Electric push rods 20 are fixedly installed on both sides of the operating table 2. A connecting plate 21 is fixedly installed above the electric push rods 20. A hollow cavity 200 is opened in the middle of the operating table 2. An air vent 201 communicating with the hollow cavity 200 is provided on the top of the operating table 2. A stabilizing unit is provided on one side of the operating table 2 to generate an adsorption force in the air vent 201 so that the finished bag film 101 is stably processed on the operating table 2. A lifting box 3 is installed between the connecting plates 21 on both sides. A glue application unit is detachably installed at the bottom of the lifting box 3. A cleaning unit is also provided on both sides of the lifting box 3 to clean the film 101 before applying glue. A blowing unit is also provided at the four corners of the bottom of the lifting box 3 to blow air on the film 101 after applying glue to accelerate its curing.

[0025] When the finished bag film 1 is processed on the operating table 2, multiple finished bag films 1 are connected together. After the subsequent processing is completed, they can be cut. When each corresponding finished bag film 1 is processed on the operating table 2, the external receiving and releasing parts respectively receive and release both ends of the batch of finished bag films 1, so that the batch of finished bag films 1 are placed on the operating table 2 in sequence.

[0026] The adhesive application unit includes a U-shaped groove 30 at the bottom of the lifting box 3. A U-shaped plate 31 is detachably installed inside the U-shaped groove 30. A slot 311 is provided on the inner side of the U-shaped plate 31. A receiving groove 312 is provided on one side of the slot 311 at the bottom of the lifting box 3. Adhesive cotton 32 is provided on the side of the U-shaped plate 31 away from the U-shaped groove 30. Several guide tubes are provided between the U-shaped plate 31 and the adhesive cotton 32. A circular groove 33 is provided at the center of the bottom of the lifting box 3, located inside the U-shaped groove 30. A central box 34 is fixedly installed in the middle of the circular groove 33.

[0027] When applying adhesive to the finished bag film 1 on the operating table 2, firstly, the electric push rod 20 is activated to move the connecting plate 21 downward, thereby moving the lifting box 3 downward. When the lifting box 3 moves downward, the squeezing rod 205 presses down on the pressure rod 203, thereby causing the connecting pipe 204 to draw the gas in the hollow cavity 200 into the adsorption box 202. At this time, the air vent 201 below the finished bag film 1 generates suction on the finished bag film 1, thus making the finished bag film 1 stably adsorbed on the operating table 2. As the lifting box 3 moves downward, as the end plate 49 contacts the operating table 2, it creates resistance on the end plate 49. The end plate 49 drives the suction rod 48 upward. At this time, the suction rod 48 is in the air cylinder 47 The internal compression is achieved by the upward movement of the end plate 49, which drives the toothed plate frame 491 to move upward. When the toothed plate frame 491 moves upward, it meshes with the gear 43, thereby driving the gear 43 and the rotating rod 42 to rotate. When the rotating rod 42 rotates, it drives the flipping arm plate 44 to rotate. When the flipping arm plates 44 on both sides move away from each other and flip, they respectively drive the cleaning rollers 45 on both sides to flip. When the cleaning rollers 45 flip, they can clean the surface of the finished bag film 1. Since the lifting box 3 will continue to move downward when the cleaning rollers 45 flip, in order to avoid the cleaning rollers 45 being blocked when flipping, the slider 41 squeezes the spring in the rectangular groove 4 to move upward, thereby effectively preventing the cleaning rollers 45 from being blocked. 5. During the flipping process, the cleaning roller 45 is resisted. When the cleaning roller 45 flips away from below the lifting box 3, and the lifting box 3 moves down to contact the finished bag film 1, the piston rod 362 will be squeezed by the operating table 2, thus moving upward in the cylindrical groove 36. At this time, the suction pipe 363 sucks the storage box 35. The suction force generated in the storage box 35 will draw the glue in the bottom groove 352 through the bent pipe 355 into the U-shaped plate 31, and finally transport it to the coating cotton 32 through the guide pipe. Since the coating cotton 32 is in contact with the outside of the outlet 10 on the finished bag film 1 at this time, the glue coating is completed. When the lifting box 3 moves upward, the glue is applied to the finished bag film. After curing on the bag film 1, a thin film 101 is formed. When the lifting box 3 moves upward, the suction rod 48 moves downward in the air cylinder 47 under the action of the spring, thereby driving the end plate 49 to move downward. The two cleaning rollers 45 flip again to the bottom of the lifting box 3. At the same time, the gas in the air cylinder 47 is transmitted to the central pipe 52 through the connecting pipe 54, and finally transmitted to the corner block 5 through multiple branch pipes 53. Finally, the gas in the corner block 5 blows the adhesive coated on the finished bag film 1 below the lifting box 3 through the blowing hole 51, thereby accelerating its curing. After the adhesive has cured and formed the thin film 101, the tearable film 11 is manually attached to the finished bag film 1.

[0028] A rotating rod 341 is threadedly mounted in the middle of the central box 34. A disc 342 located inside the central box 34 is fixedly mounted in the middle of the rotating rod 341. A pressing block 343 is fixedly mounted on the outside of the disc 342. A crossbar 344 that passes through the receiving groove 312 is slidably mounted on the side of the central box 34 facing the receiving groove 312. One end of the crossbar 344 located inside the central box 34 is spherical. A locking block 345 that engages with the locking groove 311 is fixedly mounted on the other end of the crossbar 344. A spring located in the circular groove 33 is sleeved on the outside of the crossbar 344.

[0029] Rotating the rotating rod 341 inside the center box 34 causes the disc 342 and the extrusion block 343 to rotate synchronously. The extrusion block 343 pushes the crossbar 344 at the spherical end to slide outward, causing the locking block 345 to disengage from the slot 311 of the U-shaped plate 31. This allows the U-shaped plate 31, along with the adhesive cotton 32, to be removed from the U-shaped groove 30 at the bottom of the lifting box 3. Reversing the rotation of the rotating rod 341 causes the spring on the outside of the crossbar 344 to push the locking block 345 back into the slot 311, completing the locking process. This allows for quick disassembly and replacement of the U-shaped plate 31 and the adhesive cotton 32, facilitating the cleaning of adhesive residue and replacement of worn adhesive cotton 32 without the need for complete disassembly of the lifting box 3, thus reducing equipment maintenance time.

[0030] When the lifting box 3 moves downward, the piston rod 362 is pushed upward by the operating table 2 along the first cylindrical groove 36 and the second cylindrical groove 361. The upward movement of the piston rod 362 causes a change in the internal volume of the first cylindrical groove 36, creating a negative pressure in the annular tube 354 through the suction pipe 363. The negative pressure opens the one-way valve at the bend pipe 355, and the adhesive inside the storage box 35 is sequentially sent to the U-shaped plate 31 through the bottom groove 352, the side pipe 353, the annular tube 354, and the bend pipe 355. After the lifting box 3 is raised, the spring inside the second cylindrical groove 361 pushes the piston rod 362 to reset, the negative pressure disappears, the one-way valve closes, and the adhesive delivery is automatically cut off. The mechanical linkage realizes automatic glue supply during downward pressure coating and automatic glue cut-off during lifting, avoiding continuous glue seepage from the coating cotton 32 when the equipment is idle, preventing glue overflow and dirt defects in the finished bag film 1, and saving glue.

[0031] The adhesive application unit also includes a storage box 35 located at the center of the upper surface of the lifting box 3. The top of the storage box 35 is provided with a box cover 351. The bottom of the storage box 35 is connected to a bottom groove 352 located inside the lifting box 3. One side of the bottom groove 352 is provided with a side pipe 353 connected to the side pipe 353 and located inside the lifting box 3. The outside of the side pipe 353 is provided with an annular pipe 354 coaxially arranged with it. The side pipe 353 is connected to the annular pipe 354. The annular pipe 354 and the U-shaped groove 30 are connected by a bent pipe 355. A one-way valve is provided at the connection between the annular pipe 354 and the bent pipe 355.

[0032] A cylindrical groove 36 is provided on the side of the annular tube 354 away from the bent tube 355, which is located in the inner cavity of the lifting box 3. A cylindrical groove 361 located at the bottom of the lifting box 3 is connected directly below the cylindrical groove 36. A piston rod 362 is slidably installed between the cylindrical groove 361 and the cylindrical groove 36. A spring is also provided outside the piston rod 362 and located in the cylindrical groove 361. A suction tube 363 connected to the annular tube 354 is provided on the side of the cylindrical groove 361 near the cylindrical groove 361.

[0033] The cleaning unit includes two sets of rectangular slots 4 respectively opened on both sides of the lifting box 3. Each set of rectangular slots 4 has a slider 41 slidably installed in it. The slider 41 is equipped with a spring connected to the rectangular slot 4. The two sliders 41 in each set are rotatably mounted together with a rotating rod 42. A gear 43 is fixedly installed in the middle of the rotating rod 42. The two ends of the rotating rod 42 are equipped with symmetrically arranged flipping arm plates 44. The two flipping arm plates 44 in each set are rotatably mounted together with a cleaning roller 45.

[0034] The cleaning unit slider 41 is slidably mounted inside the rectangular groove 4 and equipped with a spring; during the process of the lifting box 3 moving downward and the cleaning roller 45 flipping outward to avoid obstruction, if the cleaning roller 45 is blocked by an external force, the slider 41 can compress the spring upward along the rectangular groove 4 to perform displacement buffering, which can prevent the flipping arm plate 44, rotating rod 42, gear 43, and toothed plate frame 491 from rigidly impacting, deforming and breaking, thereby improving the service life of each transmission part of the cleaning unit and ensuring that the flipping movement of the cleaning roller 45 is smooth and stable.

[0035] The cleaning unit also includes a positioning plate 46 located between the two sets of rectangular slots 4 and fixed to the outside of the lifting box 3. An air cylinder 47 is fixedly installed in the middle of the positioning plate 46. A suction rod 48 facing the operating table 2 is slidably installed in the middle of the air cylinder 47. An end plate 49 is fixedly installed at the bottom end of the suction rod 48. A right-angle plate 490 is symmetrically arranged on both end plates 49. A toothed plate frame 491 is symmetrically installed at the end of the right-angle plate 490 on both sides away from the end plate 49. The toothed plate frames 491 on both sides mesh with the gears 43 on both sides respectively.

[0036] The blowing unit includes corner blocks 5 installed at the four corners of the bottom of the lifting box 3. Each corner block 5 has a blowing hole 51 on the side facing the adhesive cotton 32. The lifting box 3 has a central tube 52 inside. A branch tube 53 is connected between the central tube 52 and the blowing hole 51. A connecting pipe 54 connected to the air cylinder 47 is also provided on one side of the central tube 52.

[0037] The stabilizing unit includes an adsorption box 202, a pressure rod 203 is slidably mounted in the middle of the adsorption box 202, a connecting pipe 204 connects the adsorption box 202 and the hollow cavity 200, a spring is sleeved on the outside of the connecting pipe 204 located above the adsorption box 202, and a squeezing rod 205 connected to the connecting plate 21 is located directly above the pressure rod 203.

[0038] The extrusion rod 205 moves down synchronously with the connecting plate 21 and the lifting box 3, pressing down the pressure rod 203 and pushing the gas inside the adsorption box 202 into the hollow cavity 200 through the connecting pipe 204. After the lifting box is lifted, the spring on the outside of the pressure rod 203 pushes the pressure rod 203 to reset, and a negative pressure is formed in the hollow cavity 200. The air outlet 201 generates an adsorption force to firmly fix the finished bag film 1 on the operating table 2. The negative pressure clamping action of the finished bag film 1 is triggered by the glue application and pressing action. No additional motor or vacuum pump timing control is required, which simplifies the air circuit and electrical control structure of the entire equipment and realizes automatic matching of the adsorption fixation and glue application action timing.

[0039] During the descent phase of the lifting box: the end plate 49 first contacts the operating table 2 → the suction rod 48 compresses and enters the air cylinder 47 → the toothed frame 491 moves upward to mesh with the drive gear 43 and the rotating rod 42, driving the cleaning roller 45 to flip outward to complete the cleaning of the bag film surface; after the cleaning roller 45 completely avoids the working area, the adhesive cotton 32 contacts the finished bag film 1 to apply adhesive. During the ascent phase of the lifting box: the suction rod 48 returns to its original position under the action of the spring, the pressurized gas inside the air cylinder 47 is transported to the central pipe 52 through the connecting pipe 54, and sent into the corner block 5 through the branch pipe 53, and hot air is blown out from the blowing hole 51 to accelerate the curing of the newly applied adhesive layer.

[0040] Multiple sets of corner blocks 5 of the blowing unit are arranged at the four corners of the bottom of the lifting box 3, and the blowing holes 51 face the central working area of ​​the adhesive cotton 32; the airflow is directed to the adhesive application area of ​​the U-shaped film 101 through the central pipe 52 and the branch pipe 53. The airflow is concentrated on the adhesive layer area, rather than being blown over a large area. While accelerating the curing of the adhesive into the film 101, the airflow avoids disturbing the position of the finished bag film 1 and prevents the bag film from shifting and causing the adhesive application position deviation. An external feeding mechanism continuously conveys interconnected batches of finished product bags 1, which are sequentially transported to the air vents 201 on the operating table 2. The stabilizing unit air vents 201 sequentially adsorb and position the individual batches of finished product bags 1. After the film 101 is coated and cured, the negative pressure is released to transport the next batch of finished product bags 1. This system is suitable for continuous roll-to-roll production lines and can be coupled with subsequent cutting processes to achieve continuous and uninterrupted processing of bagged substrates, thereby improving overall production efficiency. The suction rod 48 inside the same air cylinder 47: during the descent and compression stage, it drives the gear and rack transmission mechanism of the entire cleaning unit to achieve the flipping and cleaning of the cleaning roller 45; during the rise and rebound stage, it outputs the compressed gas inside the air cylinder 47 as the air source supply for the blowing unit. The glue is sent into the U-shaped plate 31 through the bent tube 355, and then evenly distributed to the U-shaped glue-coating cotton 32 through the guide tube. The glue-coating area strictly follows the contour of the U-shaped plate 31, accurately forming a U-shaped glue layer on the outer periphery of the outlet 10. The contour of the formed film 101 is regular, preventing the glue from spreading randomly, ensuring the uniform size of the film 101, and ensuring the stable sealing effect of the subsequent peelable film 11.

Claims

1. A resealable and tear-off label for packaging bags, comprising a finished bag film (1), characterized in that, The finished bag film (1) has an outlet (10) in the middle. The outside of the outlet (10) is a film (101) that is glued to the finished bag film (1) and arranged in a U-shape. The opening side of the film (101) is provided with a tearable film (11) that is glued to the finished bag film (1) to open and close the outlet (10).

2. A processing device for a reversible, tear-off sealing label for packaging bags, applied to the reversible, tear-off sealing label for packaging bags as described in claim 1, comprising an operating table (2), characterized in that, Electric push rods (20) are fixedly installed on both sides of the operating table (2), and connecting plates (21) are fixedly installed above the electric push rods (20). A hollow cavity (200) is opened in the middle of the operating table (2). An air vent (201) connected to the hollow cavity (200) is provided on the top of the operating table (2). A stabilizing unit is provided on one side of the operating table (2) to generate an adsorption force in the air vent (201) so that the finished bag film (1) can be stably processed on the operating table (2). A lifting box (3) is installed between the connecting plates (21) on both sides. A glue application unit is detachably installed at the bottom of the lifting box (3). A cleaning unit is also provided on both sides of the lifting box (3) to clean the film (101) before applying glue. A blowing unit is also provided at the four corners of the bottom of the lifting box (3) to blow air on the film (101) after applying glue to accelerate its curing.

3. The processing equipment for repeatedly closing and tearing easy-to-tear sealing labels on packaging bags according to claim 2, characterized in that, The adhesive application unit includes a U-shaped groove (30) at the bottom of the lifting box (3), a U-shaped plate (31) is detachably installed in the U-shaped groove (30), a slot (311) is provided on the inner side of the U-shaped plate (31), a receiving groove (312) is provided on one side of the slot (311) at the bottom of the lifting box (3), adhesive cotton (32) is provided on the side of the U-shaped plate (31) away from the U-shaped groove (30), and several guide pipes are provided between the U-shaped plate (31) and the adhesive cotton (32). A circular groove (33) located inside the U-shaped groove (30) is provided at the center of the bottom of the lifting box (3), and a center box (34) is fixedly installed in the middle of the circular groove (33).

4. The processing equipment for repeatedly closing and tearing easy-to-tear sealing labels on packaging bags according to claim 3, characterized in that, A rotating rod (341) is threadedly mounted in the middle of the central box (34). A disc (342) located inside the central box (34) is fixedly mounted in the middle of the rotating rod (341). An extrusion block (343) is fixedly mounted on the outside of the disc (342). A crossbar (344) that passes through the receiving groove (312) is slidably mounted on the side of the central box (34) facing the receiving groove (312). One end of the crossbar (344) located inside the central box (34) is spherical. A locking block (345) that engages with the locking groove (311) is fixedly mounted on the other end of the crossbar (344). A spring located in the circular groove (33) is sleeved on the outside of the crossbar (344).

5. The processing equipment for repeatedly closing and tearing easy-to-tear sealing labels on packaging bags according to claim 4, characterized in that, The adhesive application unit also includes a storage box (35) located at the center of the upper end face of the lifting box (3). The top of the storage box (35) is provided with a box cover (351). The bottom of the storage box (35) is connected to a bottom groove (352) located inside the lifting box (3). A side tube (353) connected to a side tube (353) and located inside the lifting box (3) is provided on one side of the bottom groove (352). An annular tube (354) is provided on the outside of the side tube (353) and is coaxially arranged with it. The side tube (353) is connected to the annular tube (354). A bent tube (355) is connected between the annular tube (354) and the U-shaped groove (30). A one-way valve is provided at the connection between the annular tube (354) and the bent tube (355).

6. The easy-tear sealing label for repeatedly closing packaging bags according to claim 5, characterized in that, The annular tube (354) is provided with a cylindrical groove 1 (36) in the inner cavity of the lifting box (3) on the side away from the bent tube (355). The cylindrical groove 1 (36) is connected to a cylindrical groove 2 (361) in the bottom of the lifting box (3) directly below the cylindrical groove 1 (36). A piston rod (362) is slidably installed between the cylindrical groove 2 (361) and the cylindrical groove 1 (36). A spring is also provided outside the piston rod (362) in the cylindrical groove 2 (361). A suction tube (363) connected to the annular tube (354) is provided on the side of the cylindrical groove 1 (36) close to the cylindrical groove 2 (361).

7. The easy-tear sealing label for repeatedly closing packaging bags according to claim 6, characterized in that, The cleaning unit includes two sets of rectangular slots (4) respectively opened on both sides of the lifting box (3). Each set of rectangular slots (4) has a slider (41) slidably installed in it. The slider (41) is provided with a spring connected to the rectangular slot (4). The two sliders (41) in each set are rotatably installed together with a rotating rod (42). A gear (43) is fixedly installed in the middle of the rotating rod (42). The two ends of the rotating rod (42) are provided with symmetrically arranged flipping arm plates (44). The two flipping arm plates (44) in each set are rotatably installed together with a cleaning roller (45).

8. The easy-tear sealing label for repeatedly closing packaging bags according to claim 7, characterized in that, The cleaning unit also includes a positioning plate (46) located between two sets of rectangular grooves (4) and fixed to the outside of the lifting box (3). An air cylinder (47) is fixedly installed in the middle of the positioning plate (46). A suction rod (48) facing the operating table (2) is slidably installed in the middle of the air cylinder (47). An end plate (49) is fixedly installed at the bottom of the suction rod (48). A right-angle plate (490) is symmetrically arranged on both end plates (490). A toothed plate frame (491) is installed at the end of the right-angle plate (490) on both sides away from the end plate (49). The toothed plate frames (491) on both sides mesh with the gears (43) on both sides respectively.

9. The easy-tear sealing label for repeatedly closing packaging bags according to claim 8, characterized in that, The blowing unit includes corner blocks (5) installed at the four corners of the bottom of the lifting box (3). Multiple corner blocks (5) have blowing holes (51) on the side facing the adhesive cotton (32). The lifting box (3) has a central tube (52) inside. A branch tube (53) is connected between the central tube (52) and the blowing hole (51). A connecting tube (54) connected to the air cylinder (47) is also provided on one side of the central tube (52).

10. The easy-tear sealing label for repeatedly closing packaging bags according to claim 9, characterized in that, The stabilizing unit includes an adsorption box (202), a pressure rod (203) is slidably installed in the middle of the adsorption box (202), a connecting pipe (204) is connected between the adsorption box (202) and the hollow cavity (200), a spring is sleeved on the outside of the connecting pipe (204) above the adsorption box (202), and a squeezing rod (205) connected to the connecting plate (21) is provided directly above the pressure rod (203).

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