A test paper bag seal adhesive stamping device

Abstract

The utility model discloses a kind of test paper bag seal strip bonding seal device, belong to examination test paper packaging equipment technical field, the device includes conveyor main body, front gauge component, first photoelectric detection component, roll glue component, blowing component, compaction component, seal component and first to third elastic compression wheel group, conveyor main body conveys test paper bag, front gauge component positions test paper bag, first photoelectric detection component triggers roll glue component dynamic gluing, blowing component promotes gluing seal strip to adhere bag tongue, compaction component strengthens bonding, seal component automatically completes seal and dips ink, and elastic compression wheel group guarantees that test paper bag position is stable, the device realizes seal strip bonding and seal whole-process automation, solve uneven gluing, bonding is not firm, seal deviation and the problem of low efficiency, improve packaging quality, security and efficiency, reduce artificial dependence.

Description

Technical Field

[0001] This utility model belongs to the technical field of examination paper packaging equipment, specifically relating to a sealing and stamping device for examination paper bags. Background Technology

[0002] In scenarios such as exam organization and sealing of classified documents, the final sealing of the exam paper bag requires a seal covering the bag flap. The exam paper bag is a blank bag when it leaves the factory. Afterwards, the exam papers are first filled in and the bag flap is sealed (the bag flap is folded along the edge of the bag opening and fixed to form a preliminary seal). Only the seal is left in a pending state, that is, one end of the seal is pre-attached to a designated position on the bottom side of the exam paper bag, and the remaining free end is in a state to cover the bag flap. After the bag flap is sealed, the free end needs to be covered on the surface of the bag flap. A secondary seal is achieved by bonding the seal to the bag flap and the bag body. Finally, a stamp is affixed to the overlapping area of ​​the seal and the bag flap, forming a multi-layer confidentiality structure of seal-bag flap-stamp, ensuring that it cannot be opened without damage after sealing and ensuring the security of the contents. Currently, the subsequent processing of exam paper bags with sealed flaps and free ends of the seals awaiting coverage is still primarily done manually. The core shortcomings lie in the entire process of applying glue, bonding, and stamping, making it difficult to meet both confidentiality and efficiency requirements. Manual processing requires manually applying glue to the free end of the seal or the surface of the flap, then covering the flap with the seal and pressing it in place. Finally, a stamp is applied to the overlapping area using a hand-held ink stamp. There is no standardized glue application process; the amount and evenness of the glue application rely entirely on manual experience. Too much glue can easily seep into the bag and contaminate the internal exam papers, while too little glue results in a weak bond between the seal and the flap, leading to peeling and detachment during transportation, creating gaps in the seal and failing to meet the confidentiality requirements of classified scenarios. Furthermore, inconsistent pressure during the pressing process results in some areas being poorly bonded, further reducing the reliability of the seal. Meanwhile, the manual processing is inefficient and suffers from poor quality consistency. The entire subsequent processing requires four steps: applying glue, sealing, pressing and bonding, and stamping. Each step requires manual operation: before applying glue, the application area must be repeatedly checked to avoid exceeding the area covered by the seal; before stamping, the overlap between the stamp and the seal / bag flap must be manually calibrated to ensure that the stamp covers both to form an effective confidentiality mark. Processing a single exam paper bag is time-consuming, and during peak exam periods, when dealing with thousands or even tens of thousands of exam paper bags, it is completely impossible to meet the needs of batch processing. The long-term repetitive glue application, pressing, and stamping operations easily lead to human fatigue, which not only exacerbates the problems of uneven glue application and inadequate pressing, but also causes blurry stamps and misaligned positions, directly affecting the effectiveness of the sealing and increasing the rework cost of defective products. In summary, the current method of manually handling sealed test paper bags with the tongue already sealed and the free end of the seal ready to be covered suffers from defects such as poor glue quality, low bonding reliability, low processing efficiency, and unstable quality. It can no longer meet the requirements of large-scale, high-precision, and high-reliability packaging. There is an urgent need for an integrated device that automates the entire process, solves the core pain points of manual operation, ensures the packaging quality and confidentiality of test paper bags, and reduces reliance on manual labor. Utility Model Content

[0003] The purpose of this utility model is to solve the above-mentioned technical problems, and thus provides a test paper bag sealing and stamping device, which has the advantages of improving the sealing efficiency and quality of test paper bag seals, ensuring firm sealing, and accurate stamping position.

[0004] A sealing and stamping device for test paper bags, the technical solution of which is as follows: It includes a conveyor body for conveying test paper bags; a front guide assembly located above the conveyor body for positioning the front end of the test paper bag; a first photoelectric detection assembly for detecting whether the test paper bag is in position and outputting a glue-rolling trigger signal; a glue-rolling assembly that, in response to the glue-rolling trigger signal, dynamically applies glue to the sealing position of the test paper bag; an air-blowing assembly located downstream of the glue-rolling assembly for blowing air onto the glued seal to promote adhesion of the seal to the test paper bag; a compaction assembly located downstream of the air-blowing assembly for compacting the sealed bag opening; a stamping assembly for automatically stamping and inking at a designated position on the test paper bag; and a first elastic pressure roller group, a second elastic pressure roller group, and a third elastic pressure roller group distributed along the conveying direction, cooperating with the conveyor body to clamp the test paper bag and ensure its stable position during processing.

[0005] Furthermore, this application also proposes that the front guide assembly includes a front guide rod, a front guide block, a front guide cylinder bracket, a front guide cylinder, and a baffle; the front guide rod is fixedly installed on the conveyor body, the front guide block is clamped on the front guide rod, the front guide cylinder is fixed to the front guide block through the front guide cylinder bracket, the baffle is connected to the piston rod end of the front guide cylinder, and the front guide cylinder is used to drive the baffle to move up and down to achieve the positioning and release of the test paper bag.

[0006] Furthermore, this application also proposes that the first photoelectric detection component includes a first photoelectric rod, a first photoelectric card block, a first photoelectric bracket, and a first photoelectric switch; the first photoelectric rod is fixedly installed on the conveyor body, the first photoelectric card block is clipped onto the first photoelectric rod, and the first photoelectric switch is installed on the first photoelectric card block through the first photoelectric bracket and is located downstream of the front guide component.

[0007] Furthermore, this application proposes that the glue-rolling assembly includes a floating bearing assembly, a glue-rolling bracket, a glue-rolling cylinder, a glue-spraying pipe, a glue-rolling shaft, a glue-rolling brush, a glue-rolling mating brush, and a roller; the glue-rolling cylinder is fixedly installed on the conveyor body, and its output end is connected to the glue-rolling bracket to drive the glue-rolling bracket to move up and down; one end of the glue-rolling shaft is connected to the glue-rolling bracket, and the other end is connected to the floating bearing in the floating bearing assembly; the glue-rolling brush is installed on the glue-rolling shaft, and the glue-rolling mating brush is installed on the glue-rolling bracket and arranged opposite to the glue-rolling brush; the roller is installed at one end of the glue-rolling shaft near the floating bearing assembly to drive the glue-rolling shaft and thus drive the glue-rolling brush and the glue-rolling mating brush to rotate; the glue-spraying pipe is used to supply glue to the glue-rolling brush; when the glue-rolling cylinder is activated, it drives the glue-rolling shaft, the glue-rolling brush, the glue-rolling mating brush, and the roller to move up and down as a whole, realizing dynamic glue application to the seal position of the test paper bag.

[0008] Furthermore, this application also proposes that the air blowing assembly includes an air blowing rod, an air blowing block, and an air blowing pipe; the air blowing rod is fixedly installed on the conveyor body, the air blowing block is clamped on the air blowing rod, and the air blowing pipe is installed on the air blowing block, with its air outlet direction perpendicular to the test paper bag conveying direction and forming an acute angle with the conveyor belt plane of the conveyor body.

[0009] Furthermore, this application also proposes that the compaction assembly includes a compaction rod, a compaction block, a compaction cylinder bracket, a compaction cylinder, and a compaction plate; the compaction rod is fixedly installed on the conveyor body, the compaction block is clamped on the compaction rod, the compaction cylinder is installed on the compaction block through the compaction cylinder bracket, the compaction plate is connected to the piston rod end of the compaction cylinder, the compaction cylinder is used to drive the compaction plate to move up and down to compact the bag opening, and the bottom of the compaction plate is provided with compaction rubber or sponge.

[0010] Furthermore, this application proposes that the stamping assembly includes a stamping bracket fixed to the conveyor body and a stamping truss mounted on the stamping bracket; the stamping truss is provided with guide rails arranged along its length, two sets of sliders are symmetrically slidably mounted on the guide rails, each set of sliders is equipped with a stamping cylinder bracket, the stamping cylinder is mounted on the stamping cylinder bracket and connected to the corresponding stamping assembly, the stamping cylinder is used to drive the stamping assembly to move up and down to complete the stamping; the base ends of the two sets of transverse cylinders are hinged to the stamping truss, and the output ends are respectively hinged to the top of the corresponding stamping cylinder bracket, used to drive the stamping assembly to move horizontally back and forth along the guide rail, realizing the switching between the stamping station and the corresponding ink cartridge; the two sets of ink cartridges are fixed on the stamping truss.

[0011] Furthermore, this application also proposes that the first elastic pressure roller group, the second elastic pressure roller group, and the third elastic pressure roller group have the same structure, each including a pressure roller guide rod, a pressure roller locking block, a pressure roller bracket, a pressure roller body, and a pressure roller spring; the pressure roller guide rod is fixedly installed on the conveyor body, the pressure roller locking block is locked on the pressure roller guide rod, one end of the pressure roller bracket is hinged to the pressure roller locking block, and the other end is installed with the pressure roller body, and the pressure roller spring is located between the pressure roller bracket and the pressure roller locking block.

[0012] Furthermore, this application also proposes that the floating bearing assembly includes a floating bearing frame, a slide rail, a floating bearing, a guide rod, a nut, and a spring; the floating bearing frame is fixed to the conveyor body, the floating bearing is slidably connected to the floating bearing frame through the slide rail, and one end of the rubber roller is connected to the floating bearing; the lower end of the guide rod is slidably engaged with the floating bearing, the upper end extends out of the floating bearing frame, and the spring is sleeved on the guide rod and located between the nut and the floating bearing.

[0013] Furthermore, this application also proposes that the stamping assembly is further equipped with a second photoelectric detection assembly and a third photoelectric detection assembly; the second photoelectric detection assembly includes a second photoelectric bracket and a second photoelectric switch, and the third photoelectric detection assembly includes a third photoelectric bracket and a fourth photoelectric switch. Both the second and third photoelectric brackets are installed at the bottom of the stamping truss; the third photoelectric detection assembly is used to detect whether the test paper bag has reached the stamping station. After the test paper bag is in place, the stamping cylinder is triggered to extend and complete the stamping. After the stamping is completed, the stamping cylinder retracts, and then the horizontal movement cylinder moves the stamp assembly to the ink cartridge. The stamping cylinder extends again to dip the stamp assembly in ink. After the ink is dipped, the stamping cylinder retracts, and the horizontal movement cylinder resets; the second photoelectric detection assembly is used to detect whether a bag jam occurs during the conveying process. If a bag jam is detected, the entire machine is stopped.

[0014] Compared with the prior art, the beneficial effects achieved by this utility model are as follows: The test paper bag sealing and stamping device provided by this utility model, by integrating the main body of the conveyor, the front guide assembly, the first photoelectric detection assembly, the glue rolling assembly, the air blowing assembly, the compaction assembly, the stamping assembly and multiple sets of elastic pressure rollers, realizes the full-process automation of the test paper bag sealing and stamping, effectively solving the core pain points of the traditional purely manual processing method. The front guide assembly and the elastic pressure roller assembly work together to ensure the stability of the test paper bag during transportation and processing, avoiding deviations in subsequent processes caused by displacement. The first photoelectric detection assembly precisely triggers the dynamic glue application of the roller assembly. Combined with the quantitative glue supply from the glue spray tube and the uniform coating structure of the roller brush and roller brush, this not only eliminates the problems of excessive glue seepage and contamination of the test paper or insufficient glue application leading to weak adhesion during manual glue application, but also ensures consistent glue application. The air blowing assembly promotes the glued seal to quickly adhere to the bag flap through directional air blowing. The subsequent compaction assembly further enhances the adhesion effect with the compaction plate with elastic material, eliminating the risk of weak adhesion caused by uneven manual pressing. The stamping assembly achieves precise switching between the stamping station and the ink cartridge through the linkage of the guide rail, slider and double cylinder, automatically completing the stamping and ink dipping, avoiding problems such as positional deviation and blurred marks caused by manual stamping. The entire system eliminates the need for manual operation of each step, such as applying glue, bonding, and stamping, significantly reducing the processing time for a single exam paper bag. This meets the batch processing needs during peak exam periods and reduces quality fluctuations caused by human fatigue, minimizing rework costs for defective products. Furthermore, through the standardized collaboration of various components, a multi-layered security structure of seal, flap, and stamp is formed, ensuring the airtightness and security of the exam paper bags after sealing. This comprehensively improves the efficiency, quality stability, and security performance of exam paper bag sealing, while reducing reliance on manual operation. Attached Figure Description

[0015] To more clearly illustrate the technical solutions in the embodiments of this utility model or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0016] Figure 1 This is a schematic diagram of the overall structure of the test paper bag sealing and stamping device of this utility model. Figure 1 ; Figure 2 This is a schematic diagram of the overall structure of the test paper bag sealing and stamping device of this utility model. Figure 2 ; Figure 3 This utility model Figure 2 A magnified view of a portion of the structure at point A in the middle; Figure 4This utility model Figure 2 A magnified view of the local structure at point B; Figure 5 This is a top view of the test paper bag sealing device of this utility model; Figure 6 This utility model Figure 5 A cross-sectional view along the AA direction; Figure 7 This utility model Figure 5 A cross-sectional view along the BB direction.

[0017] In the diagram: 1. Conveyor body; 2. Front guide assembly; 3. First photoelectric detection assembly; 4. Rolling glue assembly; 5. Air blowing assembly; 6. Compacting assembly; 7. Stamping assembly; 8. First elastic pressure roller group; 9. Second elastic pressure roller group; 10. Third elastic pressure roller group; 21. Front guide guide rod; 22. Front guide guide block; 23. Front guide guide cylinder bracket; 24. Front guide guide cylinder; 25. Baffle; 31. First photoelectric guide rod; 32. First photoelectric guide block; 33. First photoelectric support; 34. First photoelectric switch; 41. Floating bearing assembly; 42. Rolling glue shaft; 43. Roller; 44. Rolling glue brush; 45. Rolling glue matching brush; 46. Rolling glue support; 47. Rolling glue cylinder; 48. Glue spraying pipe; 51. Air blowing rod; 52. Air blowing clip. 53. Air blowing pipe; 61. Compacting rod; 62. Compacting block; 63. Compacting cylinder bracket; 64. Compacting cylinder; 65. Compacting plate; 71. Stamping bracket; 72. Stamping truss; 73. Guide rail; 74. Slider; 75. Stamping cylinder bracket; 76. Stamping cylinder; 77. Horizontal movement cylinder; 78. Stamp assembly; 711. Ink cartridge; 721. Second photoelectric bracket; 722. Second photoelectric switch; 723. Third photoelectric bracket; 724. Third photoelectric switch; 81. Pressure roller block; 82. Pressure roller bracket; 83. Pressure roller body; 84. Pressure roller spring; 411. Floating bearing frame; 412. Slide rail; 413. Floating bearing; 414. Guide rod; 415. Nut; 416. Spring. Detailed Implementation

[0018] To better understand the above technical solution, the technical solution of this utility model will be described in detail below with reference to the accompanying drawings and specific embodiments.

[0019] One embodiment of this utility model is provided: Please refer to the appendix. Figure 1 , Figure 2 This application proposes a test paper bag sealing and stamping device, including a conveyor body 1, a front guide assembly 2, a first photoelectric detection assembly 3, a glue rolling assembly 4, an air blowing assembly 5, a compaction assembly 6, a stamping assembly 7, and a first elastic pressure roller group 8, a second elastic pressure roller group 9, and a third elastic pressure roller group 10.

[0020] The conveyor body 1 is used to transport the test paper bags. The front guide assembly 2 is located above the conveyor body 1 and is used to position the front end of the test paper bags. The first photoelectric detection assembly 3 is used to detect whether the test paper bags are in place and outputs a glue-rolling trigger signal. The glue-rolling assembly 4 responds to the glue-rolling trigger signal and dynamically applies glue to the seal of the test paper bags. The air blowing assembly 5 is located downstream of the glue-rolling assembly 4 and is used to blow air onto the glued seal to make the seal adhere to the test paper bags. The compaction assembly 6 is located downstream of the air blowing assembly 5 and is used to compact the sealed bag opening. The stamping assembly 7 is used to automatically stamp and ink the test paper bags at the designated positions. The first elastic pressure roller group 8, the second elastic pressure roller group 9, and the third elastic pressure roller group 10 are distributed along the conveying direction and cooperate with the conveyor body 1 to clamp the test paper bags and ensure their stable position during processing.

[0021] This technical solution integrates conveying, positioning, detection, gluing, air blowing, compaction, and stamping functions to achieve fully automated processing of test paper bag sealing and stamping. Compared with manual operation, this device can precisely control the amount of glue used and the uniformity of application, avoiding problems of too much or too little glue; the synergistic action of the air blowing component 5 and the compaction component 6 ensures a firm bond between the seal and the bag flap; the automatic stamping function solves the problems of positional misalignment and blurriness in manual stamping. The entire device can operate continuously and stably, significantly improving processing efficiency and consistency, and effectively solving the technical problems of poor glue application quality, low bonding reliability, and low processing efficiency in manual operation.

[0022] like Figure 3 , Figure 6 As shown, this application also proposes that two sets of front guide components 2 are centrally symmetrically arranged along the width direction of the conveyor belt. Each set of front guide components 2 includes a front guide rod 21, a front guide block 22, a front guide cylinder bracket 23, a front guide cylinder 24, and a baffle 25. The front guide rod 21 is fixedly installed on the conveyor body 1, the front guide block 22 is clamped on the front guide rod 21, the front guide cylinder 24 is fixed to the front guide block 22 through the front guide cylinder bracket 23, and the baffle 25 is connected to the piston rod end of the front guide cylinder 24. The front guide cylinder 24 is used to drive the baffle 25 to move up and down to achieve the positioning and release of the test paper bag. The front guide rod 21 can be made of aluminum alloy and is fixed to the mounting seats on both sides of the conveyor body 1 by a locking block. Its axis is perpendicular to the conveying direction and is connected to the front guide locking block 22 by bolts. The front guide locking block 22 has a locking groove inside that matches the front guide rod 21. The position is locked by tightening the bolts. The front guide cylinder bracket 23 is a rectangular sheet metal part, and its vertical section has mounting holes for fixing the front guide cylinder 24. The front guide cylinder 24 is preferably a double-acting cylinder. The piston rod end is connected to a baffle 25 by a thread. The baffle 25 is an L-shaped aluminum alloy plate. The front guide cylinder 24 drives the baffle 25 to move vertically. When descending, it blocks the front end of the test paper bag to achieve positioning. When rising, it releases the test paper bag to continue conveying.

[0023] like Figure 3As shown, this application also proposes that the first photoelectric detection component 3 includes a first photoelectric rod 31, a first photoelectric locking block 32, a first photoelectric bracket 33, and a first photoelectric switch 34; the first photoelectric rod 31 is fixedly installed on the conveyor body 1, the first photoelectric locking block 32 is locked on the first photoelectric rod 31, and the first photoelectric switch 34 is installed on the first photoelectric locking block 32 through the first photoelectric bracket 33 and is located downstream of the front guide component 2; specifically, the first photoelectric rod 31 is made of aluminum alloy, the first photoelectric locking block 32 has a slot inside that matches the first photoelectric rod 31, and the position is locked by tightening the bolt, and the first photoelectric switch 34 is preferably a diffuse reflection photoelectric sensor.

[0024] The glue-rolling assembly 4 includes a floating bearing assembly 41, a glue-rolling bracket 46, a glue-rolling cylinder 47, a glue-spraying pipe 48, a glue-rolling shaft 42, a glue-rolling brush 44, a glue-rolling mating brush 45, and a roller 43. The glue-rolling cylinder 47 is fixedly mounted on the conveyor body 1, and its output end is connected to the glue-rolling bracket 46 to drive the glue-rolling bracket 46 to move up and down. One end of the glue-rolling shaft 42 is connected to the glue-rolling bracket 46, and the other end is connected to the floating bearing 413 in the floating bearing assembly 41. The glue-rolling brush 44 is mounted on the glue-rolling shaft 42, and the glue-rolling mating brush 45 is mounted on the glue-rolling bracket 46 and positioned opposite to the glue-rolling brush 44. The roller 43 is mounted on the end of the glue-rolling shaft 42 near the floating bearing assembly 41 and is used to drive the glue-rolling shaft, thereby driving the glue-rolling brush and the glue-rolling mating brush to rotate. The glue-spraying pipe 48 is used to supply glue to the glue-rolling brush 44. One end of the adhesive spray tube 48 extends above the roller brush 45 for supplying adhesive to the surface of the roller brush 44; the other end is connected to the outlet of the adhesive spray pump, which is connected to the adhesive storage tank and controlled by the signal from the first photoelectric detection component 3. A manual or electric flow regulating valve is installed between the adhesive spray tube 48 and the adhesive spray pump or at the outlet of the adhesive spray tube 48 to regulate the amount of adhesive output per unit time to adapt to different sealing materials or changes in ambient temperature and humidity. A peristaltic pump is preferred as the adhesive spray pump.

[0025] like Figure 7 As shown, the floating bearing assembly 41 includes a floating bearing frame 411, a slide rail 412, a floating bearing 413, a guide rod 414, a nut 415, and a spring 416. The floating bearing frame 411 is fixed to the conveyor body 1. The floating bearing 413 is slidably connected to the floating bearing frame 411 via the slide rail 412. One end of the glue-rolling shaft 42 is connected to the floating bearing 413. The lower end of the guide rod 414 is slidably engaged with the floating bearing 413, and the upper end extends outside the floating bearing frame 411. The spring 416 is sleeved on the guide rod 414 and located between the nut 415 and the floating bearing 413. When the glue-rolling cylinder 47 is activated, it drives the glue-rolling shaft 42, the glue-rolling brush 44, the glue-rolling mating brush 45, and the roller 43 to move up and down as a whole, realizing dynamic glue application to the seal of the test paper bag.

[0026] The floating bearing frame 411 serves as the mounting base and is bolted to the side wall of the conveyor body 1. A slide rail 412 is machined inside the frame. The outer ring of the floating bearing 413 has a guide groove that mates with the slide rail 412, enabling linear sliding along the vertical direction of the floating bearing frame 411. The guide rod 414 adopts a smooth shaft structure. Its lower end connects to the floating bearing 413, and a groove is provided above the floating bearing 413 to accommodate the guide rod 414. Its upper end passes through a through hole at the top of the floating bearing frame 411 and is fixed in place. The spring 416 is a compression spring, and its preload is adjusted by a nut 415. When the roller 42 is subjected to axial force generated by changes in the thickness of the test paper bag, the spring 416 provides cushioning and maintains stable contact pressure.

[0027] This technical solution utilizes a floating bearing assembly 41 to achieve elastic floating of the roller 42, enabling the roller to adapt to changes in the surface height of the test paper bag. A roller cylinder 47 drives the roller support 46 to rise and fall as a whole, causing the roller brush 44 and its mating brush 45 to form a dynamic adhesive application structure. The mating brush 45 can apply a counterforce to the roller brush 44, ensuring the adhesive penetrates evenly into the gaps between the seal fibers. The adhesive spray pipe 48 precisely controls the adhesive supply, preventing excessive penetration. Therefore, this solution solves the problems of uneven adhesive application and unstable pressure during manual application, achieving automation and standardization of the seal adhesive application process.

[0028] like Figure 5 As shown, this application also proposes that the air blowing assembly 5 includes an air blowing rod 51, an air blowing block 52, and an air blowing pipe 53. The air blowing rod 51 is fixedly installed on the conveyor body 1, the air blowing block 52 is clamped on the air blowing rod 51, and the air blowing pipe 53 is installed on the air blowing block 52. Its air outlet direction is perpendicular to the conveying direction of the test paper bag and forms an acute angle with the conveyor belt plane of the conveyor body 1. The air inlet end of the air blowing pipe 53 is connected to a solenoid valve and a pressure reducing filter assembly in sequence through an air pipe, and finally connected to a compressed air source. The solenoid valve is controlled by the action signal of the first photoelectric detection assembly 3 or the glue rolling cylinder 47. After the glue rolling is completed, it opens for 0.5-2 seconds to blow clean compressed air into the sealing area, so that the seal tightly adheres to the bag surface. The coordinated control of the air blowing pressure and angle enables the seal to achieve uniform adhesion during the conveying state, which can eliminate the phenomenon of local loose adhesion compared with manual pressing.

[0029] like Figure 5As shown, this application also proposes a compaction assembly 6. Multiple sets of the compaction assembly 6 can be arranged along the conveying direction as a redundant design for graded compaction, resulting in a more effective compaction. The compaction assembly 6 includes a compaction rod 61, a compaction block 62, a compaction cylinder bracket 63, a compaction cylinder 64, and a compaction plate 65. The compaction rod 61 is fixedly installed on the conveyor body 1. The compaction block 62 is clamped onto the compaction rod 61. The compaction cylinder 64 is installed on the compaction block 62 via the compaction cylinder bracket 63. The compaction plate 65 is connected to the piston rod end of the compaction cylinder 64. The compaction cylinder 64 drives the compaction plate 65 to move up and down to compact the bag opening. The bottom of the compaction plate 65 is provided with compaction rubber or sponge. The compaction cylinder 64 is a double-acting cylinder, and the compaction plate 65 is made of aluminum alloy with a rectangular groove at the bottom for embedding compaction rubber or sponge. The elastic compression material can adapt to the deformation compensation of bags of different thicknesses, preventing local overpressure from causing bag deformation.

[0030] like Figure 4 , Figure 5 As shown, this application also proposes that the stamping assembly 7 includes a stamping bracket 71 fixed to the conveyor body 1, and a stamping truss 72 mounted on the stamping bracket 71. The stamping truss 72 is provided with a guide rail 73 arranged along its length. Two sets of sliders 74 are symmetrically slidably mounted on the guide rail 73. Each set of sliders 74 is equipped with a stamping cylinder bracket 75. A stamping cylinder 76 is mounted on the stamping cylinder bracket 75 and connected to the corresponding stamping assembly 78. The stamping cylinder 76 is used to drive the stamping assembly 78 to move up and down to complete the stamping. The base ends of two sets of transverse cylinders 77 are hinged to the stamping truss 72, and their output ends are respectively hinged to the top ends of the corresponding stamping cylinder brackets 75, used to drive the stamping assembly 78 to move horizontally back and forth along the guide rail 73, realizing the switching between the stamping station and the corresponding ink cartridge 711. The two sets of ink cartridges 711 are fixed to the stamping truss 72.

[0031] The stamping assembly 7 also includes a second photoelectric detection assembly and a third photoelectric detection assembly. The second photoelectric detection assembly includes a second photoelectric bracket 721 and a second photoelectric switch 722, while the third photoelectric detection assembly includes a third photoelectric bracket 723 and a third photoelectric switch 724. Both the second and third photoelectric brackets 721 and 723 are installed at the bottom of the stamping truss 72. The second and third photoelectric detection assemblies can employ reflective photoelectric sensors, which determine their position by detecting the reflected light signal from the surface of the test paper bag. The third photoelectric detection assembly detects whether the test paper bag has reached the stamping station. Once the bag is in place, the stamping cylinder 76 extends to complete the stamping. After stamping, the stamping cylinder 76 retracts, and then the lateral movement cylinder 77 moves the stamp assembly 78 to the ink cartridge 711. The stamping cylinder 76 extends again to dip the stamp assembly 78 in ink. After dipping, the stamping cylinder 76 retracts, and the lateral movement cylinder 77 resets. The second photoelectric detection assembly detects whether a bag jam occurs during transport; if a jam is detected, the entire machine is stopped.

[0032] Specifically, the guide rail 73 can be a linear guide rail, and the stamp assembly 78 includes a stamp holder and a stamp. The stamp holder is connected to the piston rod of the stamping cylinder 76 via a thread, facilitating the replacement of stamps of different sizes. The ink cartridge 711 has a sponge ink storage layer, which maintains uniform ink volume through capillary action, preventing excessive or insufficient ink during dipping. The stamping cylinder 76 and the lateral movement cylinder 77 can be double-acting cylinders, with their reciprocating motion controlled by a solenoid valve. This technical solution achieves precise positioning of the stamp assembly 78 through the cooperation of the guide rail 73 and the slider 74. Combined with the lateral movement cylinder 77 driving the stamp assembly 78 to switch between the stamping station and the ink cartridge 711, it ensures accurate stamping position and timely ink supply. Compared with manual operation, this solution solves the problems of stamping position deviation, uneven ink distribution, and quality instability caused by human fatigue, realizing the automation, standardization, and efficiency of the test paper bag sealing stamping process.

[0033] like Figure 5 , Figure 6As shown, this application also proposes that the first elastic pressure roller group 8, the second elastic pressure roller group 9, and the third elastic pressure roller group 10 have the same structure, each including a pressure roller guide rod, a pressure roller locking block 81, a pressure roller bracket 82, a pressure roller body 83, and a pressure roller spring 84. The pressure roller guide rod is fixedly installed on the conveyor body 1, the pressure roller locking block 81 is locked onto the pressure roller guide rod, one end of the pressure roller bracket 82 is hinged to the pressure roller locking block 81, and the other end is fitted with the pressure roller body 83. The pressure roller spring 84 is located between the pressure roller bracket 82 and the pressure roller locking block 81. The pressure roller bracket 82 and the pressure roller locking block 81 are connected by a hinge, allowing the pressure roller body 83 to swing up and down around the hinge point to accommodate test paper bags of different thicknesses. The pressure roller spring 84 is used to provide stable downward pressure, ensuring uniform contact pressure between the pressure roller body 83 and the conveyor belt, and preventing deformation of the test paper bag due to excessive pressure or slippage due to insufficient pressure. The pressure roller body 83 can be made of rubber to increase the friction between it and the test paper bag, while avoiding scratching the bag.

[0034] Working principle The workflow of this test paper bag sealing and stamping device revolves around the entire process of automated test paper bag conveying, positioning, gluing, bonding, compaction, and stamping. Each component works in sequence to achieve precise and efficient processing. The specific process is as follows: like Figure 5 As shown, firstly, the test paper bag with the initial sealing of the flap and the free end of the seal to be processed is placed on the conveyor belt of the conveyor body 1. After the conveyor body 1 is started, it drives the test paper bag to be conveyed in a set direction. When the test paper bag is conveyed to the front guide assembly 2, the front guide cylinder 24 of the front guide assembly 2 drives the baffle 25 to move downward, blocking the front end of the test paper bag to complete the front end positioning and ensure that the position is consistent for subsequent processing. After positioning is completed, the front guide cylinder 24 drives the baffle 25 to reset upward, releasing the test paper bag to continue to be conveyed forward with the conveyor belt.

[0035] Subsequently, the test paper bag passes through the first photoelectric detection component 3 located downstream of the front guide component 2. After the first photoelectric switch 34 of the first photoelectric detection component 3 detects that the test paper bag has arrived, it outputs a signal simultaneously: on the one hand, it controls the glue spraying tube 48 to start the glue supply in advance, so that the glue is stably delivered to the glue roller brush 44 or the glue roller matching brush 45; on the other hand, it triggers the action of the glue roller assembly 4, the glue roller cylinder 47 drives the glue roller bracket 46 to move downward as a whole, and at the same time, the glue roller brush 44 presses down to contact the test paper bag, and the glue roller shaft 42 approaches the floating bearing assembly 4. One end of the roller 43 contacts the conveyor belt. The conveyor belt drives the roller 43 to rotate by friction, which in turn drives the roller shaft 42 to rotate. At this time, the roller brush 44 rotates with the roller shaft 42 during the transport of the test paper bag. The roller brush 44, together with the roller brush 45 and the roller brush 44, uses the opposing forces to evenly coat the glue delivered by the glue spray tube 48 onto the surface of the test paper bag. The floating bearing assembly 41, through the buffering effect of the spring 416, enables the roller brush 44 to adapt to the changes in the height of the test paper bag surface, ensuring stable glue application pressure and avoiding uneven glue application.

[0036] The glued test paper bag is then conveyed to the air blowing assembly 5. The solenoid valve of the air blowing assembly 5 opens after receiving a signal, and the air blowing pipe 53 blows clean compressed air to the free end of the glued seal. With the help of the airflow, the free end of the seal is quickly attached to the surface of the test paper bag's flap, thus initially completing the seal bonding.

[0037] Next, the pre-bonded test paper bag is conveyed to the bottom of the compaction component 6. The compaction cylinder 64 of the compaction component 6 drives the compaction plate 65 to move downward. The rubber or sponge material at the bottom of the compaction plate 65 contacts the sealing area and applies stable pressure to compact the bonding between the seal and the bag flap, eliminating the risk of loose bonding caused by uneven manual pressing and further strengthening the bonding strength. After compaction is completed, the compaction cylinder 64 drives the compaction plate 65 to return to its original position, and the test paper bag continues to be conveyed with the conveyor belt.

[0038] Throughout the entire conveying process, the first elastic pressure roller group 8, the second elastic pressure roller group 9, and the third elastic pressure roller group 10, distributed along the conveying direction, always play a role: the pressure roller spring 84 provides stable downward pressure, so that the pressure roller body 83 cooperates with the conveyor belt to clamp the test paper bag, effectively preventing the test paper bag from shifting or slipping during conveying and processing, and ensuring the accurate position of each process.

[0039] Finally, the exam paper bag is conveyed to the stamping station of the stamping assembly 7. After the third photoelectric detection assembly detects the exam paper bag's arrival, it triggers the stamping assembly 7 to operate: First, the stamping cylinder 76 drives the stamp assembly 78 downwards, bringing the stamp into contact with the overlapping area of ​​the exam paper bag seal and flap, completing the stamping operation. After stamping, the stamping cylinder 76 drives the stamp assembly 78 upwards, and then the lateral movement cylinder 77 moves, sliding along the guide rail 73 via the slider 74, moving the stamp assembly 78 above the ink cartridge 711. Next, the stamping cylinder 76 drives the stamp assembly 78 downwards again, allowing the stamp to pick up ink from the ink cartridge 711, ensuring clear subsequent stamping marks. After ink picking, the stamping cylinder 76 drives the stamp assembly 78 upwards, and the lateral movement cylinder 77 resets, returning the stamp assembly 78 to the stamping station to await the next exam paper bag. If the second photoelectric detection assembly detects a bag jam during conveying, it will immediately send a signal to stop the entire machine, preventing equipment failure or damage to the exam paper bag. The stamped test paper bags are then conveyed to the device exit via a conveyor belt, and the entire process of sealing and stamping the test paper bags is completed automatically.

[0040] It will be apparent to those skilled in the art that this invention is not limited to the details of the exemplary embodiments described above, and that it can be implemented in other specific forms without departing from the spirit or essential characteristics of this invention. Therefore, the embodiments should be considered illustrative and non-limiting in all respects, and the scope of this invention is defined by the appended claims rather than the foregoing description. Thus, it is intended that all variations falling within the meaning and scope of equivalents of the claims be included within this invention. No reference numerals in the claims should be construed as limiting the scope of the claims.

Claims

1. A device for sealing and stamping test paper bags, characterized in that, include: The main body of the conveyor (1) is used to transport test paper bags; The front guide assembly (2) is located above the conveyor body (1) and is used to position the front end of the test paper bag; The first photoelectric detection component (3) is used to detect whether the test roll bag is in place and output a rolling trigger signal; The glue-rolling assembly (4) dynamically applies glue to the seal position of the test paper bag in response to the glue-rolling trigger signal. The air blowing component (5) is located downstream of the glue rolling component (4) and is used to blow air onto the glued seal to make the seal adhere to the test paper bag; The compaction component (6) is located downstream of the air blowing component (5) and is used to compact the bag opening after bonding. Stamping component (7) is used to automatically stamp and dip ink at the designated position on the test paper bag; The first elastic pressure roller group (8), the second elastic pressure roller group (9), and the third elastic pressure roller group (10) are distributed along the conveying direction and cooperate with the main body of the conveyor (1) to clamp the test paper bag and ensure its stable position during processing.

2. The test paper bag sealing and stamping device according to claim 1, characterized in that, The front guide assembly (2) includes a front guide rod (21), a front guide block (22), a front guide cylinder bracket (23), a front guide cylinder (24), and a baffle (25). The front guide rod (21) is fixedly installed on the conveyor body (1), the front guide block (22) is clamped on the front guide rod (21), the front guide cylinder (24) is fixed on the front guide block (22) through the front guide cylinder bracket (23), and the baffle (25) is connected to the piston rod end of the front guide cylinder (24).

3. The test paper bag sealing and stamping device according to claim 1, characterized in that, The first photoelectric detection component (3) includes a first photoelectric rod (31), a first photoelectric card block (32), a first photoelectric bracket (33), and a first photoelectric switch (34). The first photoelectric rod (31) is fixedly installed on the conveyor body (1), the first photoelectric card block (32) is clamped on the first photoelectric rod (31), and the first photoelectric switch (34) is installed on the first photoelectric card block (32) through the first photoelectric bracket (33) and is located downstream of the front guide component (2).

4. The test paper bag sealing and stamping device according to claim 1, characterized in that, The glue-rolling assembly (4) includes a floating bearing assembly (41), a glue-rolling bracket (46), a glue-rolling cylinder (47), a glue-spraying pipe (48), a glue-rolling shaft (42), a glue-rolling brush (44), a glue-rolling mating brush (45), and a roller (43). The glue-rolling cylinder (47) is fixedly installed on the conveyor body (1), and its output end is connected to the glue-rolling bracket (46). One end of the glue-rolling shaft (42) is connected to the glue-rolling bracket (46), and the other end is connected to the floating bearing (413) in the floating bearing assembly (41). The glue-rolling brush (44) is installed on the glue-rolling shaft (42), and the glue-rolling mating brush (45) is installed on the glue-rolling bracket (46) and is arranged opposite to the glue-rolling brush (44). The roller (43) is installed on one end of the glue-rolling shaft (42) near the floating bearing assembly (41). The glue-spraying pipe (48) is arranged correspondingly to the glue-rolling brush (44).

5. The test paper bag sealing and stamping device according to claim 1, characterized in that, The air blowing assembly (5) includes an air blowing rod (51), an air blowing block (52), and an air blowing pipe (53). The air blowing rod (51) is fixedly installed on the conveyor body (1), the air blowing block (52) is clamped on the air blowing rod (51), and the air blowing pipe (53) is installed on the air blowing block (52). Its air outlet direction is perpendicular to the test paper bag conveying direction and forms an acute angle with the conveyor belt plane of the conveyor body (1).

6. The test paper bag sealing and stamping device according to claim 1, characterized in that, The compaction assembly (6) includes a compaction rod (61), a compaction block (62), a compaction cylinder bracket (63), a compaction cylinder (64), and a compaction plate (65). The compaction rod (61) is fixedly installed on the conveyor body (1), the compaction block (62) is clamped on the compaction rod (61), the compaction cylinder (64) is installed on the compaction block (62) through the compaction cylinder bracket (63), and the compaction plate (65) is connected to the piston rod end of the compaction cylinder (64). The bottom of the compaction plate (65) is provided with compaction rubber or sponge.

7. The test paper bag sealing and stamping device according to claim 1, characterized in that, The stamping assembly (7) includes a stamping bracket (71) fixed on the conveyor body (1) and a stamping truss (72) installed on the stamping bracket (71); the stamping truss (72) is provided with a guide rail (73) arranged along its length direction, two sets of sliders (74) are symmetrically slidable on the guide rail (73), each set of sliders (74) is equipped with a stamping cylinder bracket (75), and a stamping cylinder (76) is installed on the stamping cylinder bracket (75) and connected to the corresponding stamping assembly (78); the base end of the two sets of transverse cylinders (77) is hinged to the stamping truss (72), and the output end is respectively hinged to the top end of the corresponding stamping cylinder bracket (75); two sets of ink cartridges (711) are fixed on the stamping truss (72) and are correspondingly set with the stamping assembly (78).

8. The test paper bag sealing and stamping device according to claim 1, characterized in that, The first elastic pressure roller group (8), the second elastic pressure roller group (9) and the third elastic pressure roller group (10) have the same structure, each including a pressure roller rod, a pressure roller block (81), a pressure roller bracket (82), a pressure roller body (83) and a pressure roller spring (84); the pressure roller rod is fixedly installed on the conveyor body (1), the pressure roller block (81) is clamped on the pressure roller rod, one end of the pressure roller bracket (82) is hinged to the pressure roller block (81), and the other end is installed with the pressure roller body (83), and the pressure roller spring (84) is located between the pressure roller bracket (82) and the pressure roller block (81).

9. The test paper bag sealing and stamping device according to claim 4, characterized in that, The floating bearing assembly (41) includes a floating bearing frame (411), a slide rail (412), a floating bearing (413), a guide rod (414), a nut (415), and a spring (416). The floating bearing frame (411) is fixed on the conveyor body (1). The floating bearing (413) is slidably connected to the floating bearing frame (411) through the slide rail (412). One end of the rubber roller (42) is connected to the floating bearing (413). The lower end of the guide rod (414) is slidably engaged with the floating bearing (413), and the upper end extends out of the floating bearing frame (411). The spring (416) is sleeved on the guide rod (414) and located between the nut (415) and the floating bearing (413).

10. The test paper bag sealing and stamping device according to claim 7, characterized in that, The stamping assembly (7) is further provided with a second photoelectric detection assembly and a third photoelectric detection assembly; the second photoelectric detection assembly includes a second photoelectric bracket (721) and a second photoelectric switch (722), and the third photoelectric detection assembly includes a third photoelectric bracket (723) and a third photoelectric switch (724). The second photoelectric bracket (721) and the third photoelectric bracket (723) are both installed at the bottom of the stamping truss (72).

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