Automatic code spraying device and code spraying method for food packaging bag

Abstract

The invention belongs to the technical field of packaging bag code spraying, and particularly relates to a food packaging bag automatic code spraying device and a code spraying method.The food packaging bag automatic code spraying device comprises a transmission assembly, a limiting assembly is arranged above one side of the transmission assembly, and a code spraying assembly is arranged above the transmission assembly; a calibration assembly is arranged on the side, close to the limiting assembly, of the code spraying assembly. The transmission assembly comprises two supports, and a conveying belt is connected between the two supports in a transmission mode. The limiting assembly comprises a fixing plate, two communicating holes are symmetrically formed in the fixing plate, sliding rods are connected into the communicating holes in a sealed and sliding mode, and inclined plates are arranged at the bottoms of the sliding rods through splicing rods. The automatic code spraying device for the food packaging bags is high in code spraying efficiency, good in code spraying effect, high in code spraying precision, suitable for conducting self-adaptive code spraying on the packaging bags of different heights, high in adaptability, high in stability, easy to operate, high in regulation and control performance and suitable for the code spraying requirement for mass production of the packaging bags.

Description

Technical Field

[0001] The invention belongs to the technical field of packaging bag coding, in particular to an automatic coding device and a coding method for food packaging bags. Background Art

[0002] Food packaging bags are film containers that are in direct contact with food and are used to hold and protect food. They are one of the most common ways of food packaging. Manufacturers usually spray codes on the outer packaging of food before it leaves the factory to facilitate consumer understanding and after-sales management. Small character inkjet printers can print information such as production date, batch number and product specifications. Multiple lines of complex information have clear coding effects and reliable adhesion, and are not easy to fall off. The machine runs stably and is easy to operate. It can also print barcodes and QR codes to effectively prevent counterfeiting and traceability, and help ensure food production safety.

[0003] Chinese invention patent CN115626350A discloses a coding device for food packaging processing, which relates to the technical field of food packaging processing equipment, including a bottom plate, on which a feeding component and a unloading component are arranged, a pretreatment component and a coding component are arranged above the feeding component, and a defect recognition component is arranged on one side of the top outer wall of the bottom plate; the pretreatment component includes two support rods fixedly mounted on the bottom plate; the coding device has low coding efficiency and poor coding effect.

[0004] Chinese invention patent CN117261451A discloses a packaging bag coding device, including: a production seat, a conveyor belt, a transmission mechanism, a fixed frame, a fixed seat, an ink stirring and placing mechanism, a coding machine and an exhaust gas treatment mechanism. The production seat is rotatably connected with a conveyor belt; the transmission mechanism is rotatably connected to the production seat; the fixed frame is connected and fixed to the production seat; the fixed seat is movably plugged into the fixed frame; the coding device is difficult to operate and has low coding accuracy.

[0005] In the prior art, when the packaging bags are continuously conveyed backwards by means of a conveyor belt, if there are dust and impurities on the outer surface of the conveyor belt or the packaging bags, it will not only hinder the backward conveyance of the packaging bags, but also affect the coding effect of the spray terminal on the outer surface of the packaging bags.

[0006] Furthermore, when coding packaging bags of different thicknesses, the prior art lacks a corresponding adjustment function according to the thickness of the packaging bags, which causes the packaging bags to be unable to be normally conveyed backwards and affects subsequent cleaning and coding effects.

[0007] When the packaging bag is convex and tilted at the coding position, if the coding position of the packaging bag cannot be corrected, the coding position of the inkjet terminal on the surface of the packaging bag will shift simultaneously, resulting in blurred coding and failure to meet actual coding needs. Summary of the invention

[0008] In view of the above problems, the present invention provides an automatic coding device and coding method for food packaging bags.

[0009] To achieve the above object, the present invention provides the following technical solution: an automatic coding device for food packaging bags, comprising a transmission component, a limit component is provided above one side of the transmission component, a coding component is provided above the transmission component, and a calibration component is provided on the side of the coding component close to the limit component;

[0010] The transmission assembly comprises two brackets, and a conveyor belt is transmission-connected between the two brackets;

[0011] The limit assembly comprises a fixed plate, two communication holes are symmetrically arranged inside the fixed plate, a sliding rod is sealingly and slidably connected inside the communication hole, and an inclined plate is arranged at the bottom of the sliding rod through a splicing rod;

[0012] The calibration assembly comprises a movable plate, a plurality of distance sensors are evenly arranged on one side of the movable plate close to the fixed plate, two bottom grooves are symmetrically arranged at the bottom of the movable plate and located on the side of the distance sensor away from the fixed plate, a moving rod is slidably connected inside the bottom groove, a swing plate is movably connected to the bottom of the moving rod through a hinge seat, a cleaning nozzle is penetrated at the axis of the swing plate, a connecting hose is connected to the top of the bottom groove, and the other end of the connecting hose is connected to the top of the connecting hole;

[0013] The coding assembly includes a coding terminal.

[0014] The present invention detects the distance value between the movable plate and the packaging bag through multiple distance sensors, so as to quickly and efficiently obtain the bulge of the packaging bag and adjust the height of the cleaning nozzle accordingly. Therefore, on the basis of ensuring the wind cleaning of the conveyor belt and the packaging bag, the position calibration of the packaging bag is realized, and the coding effect of the subsequent spraying terminal on the packaging bag is improved. When adjusting the position of the cleaning nozzle, the height of the inclined plate can also be adjusted accordingly to ensure the stability and safety of the position calibration of the packaging bag.

[0015] Preferably, a controller is provided on one side of the bracket, and the controller electrically controls each electrical component. The outer wall of the bracket is provided with a side panel, and the top of the side panel is provided with a driving motor. The output end of the driving motor passes through the bracket and is provided with an active roller. The outer surface of the active roller is rotatably connected to the inner wall of the bracket through a bearing, and the outer surface of the active roller is connected to the internal transmission of the conveyor belt.

[0016] Preferably, the inner wall of the other end of the bracket is rotatably connected to a driven roller through a bearing, the outer surface of the driven roller is internally connected to the other end of the conveyor belt, a recycling box is provided at the end of the conveyor belt away from the fixed plate, a unloading port is provided at the top of the recycling box on the side close to the conveyor belt, a plurality of movable frames are evenly arranged at the bottom of the recycling box, moving wheels are provided at the bottom of the movable frames, a plurality of legs are evenly arranged at the bottom of the bracket, and buffer pads are provided at the bottom of the legs.

[0017] Preferably, two mounting rods are symmetrically provided on both sides of the fixed plate, the bottom of the mounting rods is fixedly connected to the top of the bracket, the connecting hole is an inverted Z-shaped structure, the inclination direction of the inclined plate is opposite to the bottom of the movable plate, and a connecting spring is provided on the top of the sliding rod, and the top of the other end of the connecting spring is fixedly connected to the inner top of the connecting hole.

[0018] Preferably, the movable plate is movably connected above the conveyor belt, the distance sensor is used to detect the distance value between the bottom of the movable plate and the top of the conveyor belt, an electromagnetic ring is provided at the inner top of the bottom groove, a magnetic slider is slidably connected inside the bottom groove, the bottom of the magnetic slider is fixedly connected to the top of the moving rod, and the magnetism between the facing end faces of the electromagnetic ring and the magnetic slider is the same.

[0019] Preferably, a retaining ring is provided at the bottom of the inner wall of the bottom groove, a return spring is provided at the top of the retaining ring, the top of the return spring is fixedly connected to the bottom of the magnetic slider, the return spring is located on the outer surface of the moving rod, the outer surface of the magnetic slider is sealed and slidably connected to the inner wall of the bottom groove, and the inner wall of the retaining ring is sealed and slidably connected to the outer surface of the moving rod.

[0020] Preferably, a vertical rod is provided on one side of the bracket, and a vertical limiter is slidably connected to the outer surface of the vertical rod, a transverse limiter is provided on one side of the vertical limiter, and a cross rod is slidably connected to the inside of the transverse limiter, and the outer surface of the cross rod is slidably connected to the inside of the movable plate, and a nozzle limiter is provided on one side of the movable plate.

[0021] Preferably, a clean air box is provided on one side of the bracket, an air pump is provided on the top of the clean air box, the input end of the air pump is connected with the clean air box, and an air intake hose is provided on the output end of the air pump, the other end of the air intake hose passes through the movable plate and is connected with the top of the cleaning nozzle, and a limit frame is provided on one side of the vertical rod, and the inner wall of the limit frame and the outer surface of the air intake hose are clamped with each other.

[0022] Preferably, the inkjet terminal is fixedly connected to the inside of the movable plate, a support frame is provided on one side of the bracket, an inkjet printer is provided on the top of the support frame, a paint tube is provided at the output end of the inkjet printer, the other end of the paint tube is connected to the top of the inkjet terminal, and a top frame is provided on the top of the vertical rod, and the inner wall of the top frame and the outer surface of the paint tube are clamped with each other.

[0023] The coding method according to the automatic coding device for food packaging bags comprises the following steps:

[0024] S1, the packaging bag is conveyed backward on the conveyor belt, the inclined plate limits the upper part of the packaging bag, the distance value detected by the distance sensor reaches the preset distance value, the cleaning nozzle sprays cleaning gas downward, and the spray terminal sprays the code on the upper part of the packaging bag;

[0025] S2, when the distance value detected by the distance sensor at the middle position decreases, and the distance values ​​detected by the distance sensors at the front and rear sides are both greater than the distance value detected by the distance sensor at the middle position, the moving rod moves downward along the bottom groove, and the moving rod drives the cleaning nozzle to move downward through the swing plate, and the distance between the cleaning nozzle and the packaging bag decreases, and the gas inside the connecting hole enters the bottom groove along the connecting hose, and the sliding rod moves upward along the connecting hole, and the sliding rod drives the inclined plate to move upward through the splicing rod;

[0026] S3, when the distance value detected by the distance sensor on the front side decreases, and the distance values ​​detected by the distance sensors on the front and rear sides are both greater than the distance value detected by the distance sensor on the front side, the moving rod on the rear side moves downward by a greater distance than the moving rod on the front side, the swing plate drives the cleaning nozzle to tilt forward, and the upward movement distance of the sliding rod at the rear end along the connecting hole increases, and the sliding rod at the rear end drives the inclined plate to move upward by a greater distance than the inclined plate at the front side moves upward through the splicing rod;

[0027] S4. When the thickness of the packaging bag increases, the distance values ​​detected by the multiple distance sensors all decrease, the moving rod moves downward along the bottom groove, and the moving rod drives the cleaning nozzle to move downward through the swing plate. The distance between the cleaning nozzle and the packaging bag decreases, and the gas inside the connecting hole enters the bottom groove along the connecting hose. The sliding rod moves upward along the connecting hole, and the sliding rod drives the inclined plate to move upward through the splicing rod, and the movable plate moves upward.

[0028] The coding method of the automatic coding device for food packaging bags has good coding effect and high coding efficiency.

[0029] Compared with the prior art, the present invention has the following beneficial effects:

[0030] 1. The present invention sets the transmission component, the limit component, the calibration component and the coding component to cooperate with each other. The automatic coding device for food packaging bags has high coding efficiency, good coding effect and high coding accuracy. It is suitable for adaptive coding of packaging bags of different heights. It has strong adaptability, high stability, simple operation and strong controllability. It is suitable for the coding needs of mass production of packaging bags.

[0031] 2. The present invention sets an inclined plate and a cleaning nozzle and other components to cooperate with each other. The automatic coding device for food packaging bags can also perform wind cleaning on the packaging bags and the outer surface of the conveyor belt before coding the packaging bags. The wind-guiding effect of the inclined plate can also guide the clean gas to the bottom of the movable plate and the spray terminal, thereby improving the cleanliness of the packaging bags and avoiding the pollution of the subsequent coding of the packaging bags caused by the existing dust and impurities.

[0032] 3. The present invention sets a distance sensor, a swing plate and other components to cooperate with each other. When there is a protrusion at the spraying position of the packaging bag, the automatic coding device for food packaging bags adaptively adjusts the height and tilt direction of the cleaning nozzle, so that the cleaning nozzle performs wind force correction on the protruding position and cooperates with the up and down movement of the inclined plate to improve the flatness and spraying accuracy of the packaging bag.

[0033] 4. The present invention sets the inclined plate and the cleaning nozzle and other components to cooperate with each other. When the thickness of the food packaging bag changes, the cleaning nozzle moves up and down to improve the cleaning and correction effect on the packaging bag, and the inclined plate moves up and down accordingly, which effectively avoids the inclined plate from causing changes in position due to changes in squeezing friction when the packaging bag is transported backward on the conveyor belt, thereby improving the transportation stability of the packaging bag. BRIEF DESCRIPTION OF THE DRAWINGS

[0034] Figure 1 It is a schematic diagram of the three-dimensional structure of the present invention;

[0035] Figure 2 It is a schematic diagram of the three-dimensional structure from another viewing angle of the present invention;

[0036] Figure 3 for Figure 2 The enlarged schematic diagram at A in the middle;

[0037] Figure 4 It is a left-side internal stereoscopic structure schematic diagram of the present invention;

[0038] Figure 5 for Figure 4 The enlarged schematic diagram of point B in the middle;

[0039] Figure 6 It is a schematic diagram of the internal three-dimensional structure of the present invention;

[0040] Figure 7 for Figure 6The enlarged schematic diagram at C in the middle;

[0041] Figure 8 It is a schematic diagram of the exploded three-dimensional structure of the inner part of the limiting assembly of the present invention;

[0042] Fig. 9 It is a schematic diagram of the exploded three-dimensional structure of the calibration component of the present invention.

[0043] In the figure: 1. Transmission assembly; 101. Conveyor belt; 102. Bracket; 103. Recycling box; 104. Movable frame; 105. Leg; 106. Side plate; 107. Driving motor; 108. Active roller; 109. Driven roller; 110. Feeding port; 2. Limiting assembly; 201. Fixed plate; 202. Mounting rod; 203. Connecting hole; 204. Connecting spring; 205. Sliding rod; 206. Splicing rod; 207. Inclined plate; 3. Calibration assembly; 301. Movable plate; 302. Distance sensor; 303. Swinging plate; 304. Cleaning Nozzle; 305, bottom groove; 306, electromagnetic ring; 307, magnetic slider; 308, moving rod; 309, reset spring; 310, retaining ring; 311, hinged seat; 312, air intake hose; 313, cleaning air box; 314, air pump; 315, connecting hose; 4, inkjet printer assembly; 401, inkjet terminal; 402, paint tube; 403, inkjet printer; 404, support frame; 405, vertical rod; 406, top frame; 407, horizontal rod; 408, vertical limiter; 409, horizontal limiter; 410, nozzle limiter; 411, limit frame. DETAILED DESCRIPTION

[0044] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0045] like Figure 1-9 As shown, the automatic coding device for food packaging bags includes a transmission component 1, which transmits the packaging bags backwards. A limit component 2 is provided above one side of the transmission component 1, which limits the packaging bags to prevent them from stacking and reducing the subsequent coding effect. A coding component 4 is provided above the transmission component 1, which works and performs coding on the outer surface of the packaging bags. A calibration component 3 is provided on the side of the coding component 4 close to the limit component 2, which calibrates the height of the packaging bags, which not only improves the coding accuracy, but also can perform wind cleaning on the outer surface of the packaging bags and the transmission component 1, effectively improving the coding effect.

[0046] The transmission assembly 1 includes two brackets 102, a controller is provided on one side of the bracket 102, and the controller electrically controls each electrical component. A conveyor belt 101 is connected between the two brackets 102, and the conveyor belt 101 transmits between the two brackets 102 and realizes the backward transmission of the packaging bag. The outer wall of the bracket 102 is provided with a side plate 106, and the top of the side plate 106 is provided with a driving motor 107. The output end of the driving motor 107 passes through the bracket 102 and is provided with an active roller 108. The driving motor 107 is started and drives the active roller 108 to rotate, and the active roller The outer surface of 108 is rotatably connected to the inner wall of the bracket 102 through a bearing, and the outer surface of the active roller 108 is connected to the internal transmission of the conveyor belt 101. The active roller 108 rotates and drives the conveyor belt 101 to transmit. The inner wall of the other end of the bracket 102 is rotatably connected to the driven roller 109 through a bearing. The outer surface of the driven roller 109 is connected to the internal transmission of the other end of the conveyor belt 101. The driven roller 109 realizes the tensioning effect on the conveyor belt 101 and cooperates with the rotation of the active roller 108 to realize the backward transmission of the packaging bags above the conveyor belt 101.

[0047] A recycling box 103 is provided at one end of the conveyor belt 101 away from the fixed plate 201, and a discharge port 110 is opened on the top of the recycling box 103 on the side close to the conveyor belt 101. The packaging bags above the conveyor belt 101 enter the recycling box 103 along the discharge port 110 for recycling after coding. A plurality of movable frames 104 are evenly arranged at the bottom of the recycling box 103, and moving wheels are arranged at the bottom of the movable frames 104. The recycling box 103 is moved with the help of the movable frames 104, thereby improving the recycling efficiency of the packaging bags inside the recycling box 103. A plurality of legs 105 are evenly arranged at the bottom of the bracket 102, and a buffer pad is arranged at the bottom of the legs 105. The legs 105 cooperate with the buffer pad at the bottom to improve the supporting stability of the bracket 102.

[0048] The limiting component 2 includes a fixed plate 201, which is located above the conveyor belt 101 and close to the side where the packaging bag is placed. Two connecting holes 203 are symmetrically arranged inside the fixed plate 201. The connecting hole 203 is internally sealed and slidably connected with a sliding rod 205. The sliding rod 205 can move up and down inside the connecting hole 203. The bottom of the sliding rod 205 is provided with an inclined plate 207 through a splicing rod 206. When the sliding rod 205 moves, the splicing rod 206 drives the inclined plate 207 to move up and down synchronously. The splicing rod 206 is tilted, so the splicing rod 206 can correct the position of the packaging bag to ensure that the packaging bag can be accurately moved to the bottom of the inclined plate 207 and conveyed.

[0049] Two mounting rods 202 are symmetrically provided on both sides of the fixed plate 201. The bottom of the mounting rod 202 is fixedly connected to the top of the bracket 102. The mounting rod 202 is used to install and fix the position of the fixed plate 201. The connecting hole 203 is an inverted Z-shaped structure. The inclined direction of the inclined plate 207 is facing the bottom of the movable plate 301. The inclined plate 207 can guide the wind force, thereby improving the wind cleaning effect under the fixed plate 201. A connecting spring 204 is provided on the top of the sliding rod 205. The top of the other end of the connecting spring 204 is fixedly connected to the inner top of the connecting hole 203. The setting of the connecting spring 204 further improves the moving elastic reset effect of the sliding rod 205 inside the connecting hole 203.

[0050] The calibration component 3 includes a movable plate 301, which is movably connected to the top of the conveyor belt 101. Therefore, in actual use, the movable plate 301 can be moved arbitrarily above the conveyor belt 101, thereby changing the coding position of different packaging bags. A plurality of distance sensors 302 are evenly arranged on the side of the movable plate 301 close to the fixed plate 201. The distance sensor 302 is used to detect the distance value between the bottom of the movable plate 301 and the conveyor belt 101. With the help of the distance value detected by the distance sensor 302, the moving position of the packaging bag above the conveyor belt 101 and the thickness and protrusion of the packaging bag can be quickly and efficiently obtained, and then the cleaning position and the coding height can be adjusted according to the different conditions of the packaging bag itself.

[0051] The bottom of the movable plate 301 is symmetrically provided with two bottom grooves 305 located on the side of the distance sensor 302 away from the fixed plate 201. The bottom grooves 305 are symmetrically distributed along the front and rear directions. The bottom of the bottom grooves 305 is slidably connected to a moving rod 308. The bottom of the moving rod 308 is movably connected to a swing plate 303 through a hinge seat 311. When the moving rod 308 moves up and down, it simultaneously drives the swing plate 303 to move up and down. When the two moving rods 308 move different distances, the swing plate 303 tilts synchronously. A cleaning nozzle 304 is penetrated at the axis of the swing plate 303, and the cleaning nozzle 304 corresponds to the distance sensor 302 located in the middle position. Cleaning gas is sprayed from the cleaning nozzle 304. When the swing plate 303 moves up and down, it drives the cleaning nozzle 304 to move up and down, thereby adjusting the wind cleaning and shape adjustment of the cleaning nozzle 304 on the top of the packaging bag, ensuring that the packaging bag is laid flat on the conveyor belt 101 and the subsequent coding process is carried out.

[0052] An electromagnetic ring 306 is provided at the inner top of the bottom groove 305, and a magnetic slider 307 is slidably connected inside the bottom groove 305. The bottom of the magnetic slider 307 is fixedly connected to the top of the moving rod 308. The magnetism between the end faces facing each other of the electromagnetic ring 306 and the magnetic slider 307 is the same. The outer surface of the magnetic slider 307 is sealed and slidably connected to the inner wall of the bottom groove 305. Therefore, when the current of the electromagnetic ring 306 increases, the electromagnetic ring 306 exerts a magnetic repulsion force on the magnetic slider 307 and drives the magnetic slider 307 to move downward. The magnetic slider 307 is 07 synchronously drives the moving rod 308 to move downward, a retaining ring 310 is provided at the bottom of the inner wall of the bottom groove 305, the inner wall of the retaining ring 310 is sealed and slidably connected with the outer surface of the moving rod 308, the retaining ring 310 limits the position of the moving rod 308, and a reset spring 309 is provided on the top of the retaining ring 310, the top of the reset spring 309 is fixedly connected with the bottom of the magnetic slider 307, the reset spring 309 is located on the outer surface of the moving rod 308, and the setting of the reset spring 309 further improves the elastic reset performance of the magnetic slider 307.

[0053] The top of the bottom groove 305 is connected to a connecting hose 315, and the other end of the connecting hose 315 is connected to the top of the connecting hole 203. When the magnetic slider 307 moves downward, the volume above the bottom groove 305 increases and the pressure decreases. The bottom groove 305 applies a suction force to the connecting hose 315, and the gas inside the connecting hole 203 enters the bottom groove 305 along the connecting hose 315. The pressure inside the connecting hole 203 decreases, and the sliding rod 205 is driven to move upward along the connecting hole 203 under the action of negative pressure.

[0054] The coding assembly 4 includes a coding terminal 401, which is fixedly connected to the inside of the movable plate 301, so the position of the coding terminal 401 will not change, the coating is sprayed out from the bottom of the coding terminal 401 and the coding is performed on the packaging bag, a vertical rod 405 is provided on one side of the bracket 102, and a vertical stopper 408 is slidably connected to the outer surface of the vertical rod 405, and a horizontal stopper 409 is provided on one side of the vertical stopper 408, and a horizontal stopper 407 is slidably connected to the inside of the horizontal stopper 409, so that the vertical stopper 408 is moved by the horizontal stopper 407. 09 is adjusted and limited in height, thereby realizing the adjustment of the height of the cross bar 407. The outer surface of the cross bar 407 is slidably connected with the inside of the movable plate 301. Correspondingly, the lateral limiter 409 adjusts the position of the cross bar 407 to realize the adjustment of the lateral position of the movable plate 301. A nozzle limiter 410 is provided on one side of the movable plate 301, and the nozzle limiter 410 further fixes and adjusts the position of the movable plate 301 on the outer surface of the cross bar 407, thereby effectively realizing the adjustment of the coding position and height of the spray terminal 401.

[0055] A clean air box 313 is provided on one side of the bracket 102, and an air pump 314 is provided on the top of the clean air box 313. The input end of the air pump 314 is connected to the clean air box 313. The air pump 314 starts and extracts the internal gas of the clean air box 313. An air intake hose 312 is provided on the output end of the air pump 314. The other end of the air intake hose 312 passes through the movable plate 301 and is connected to the top of the cleaning nozzle 304. The air pump 314 discharges the clean gas extracted from the inside of the clean air box 313 along the air intake hose 312 to the inside of the cleaning nozzle 304, and is discharged along the cleaning nozzle 304, thereby cleaning the surface of the conveyor belt 101 and the packaging bag, and correcting the coding position of the packaging bag. A limiting frame 411 is provided on one side of the vertical rod 405. The inner wall of the limiting frame 411 and the outer surface of the air intake hose 312 are mutually clamped. With the help of the limiting frame 411, the fixing effect of the air intake hose 312 is further improved.

[0056] A support frame 404 is provided on one side of the bracket 102, and a spray printer 403 is provided on the top of the support frame 404. A paint tube 402 is provided at the output end of the spray printer 403, and the other end of the paint tube 402 is connected to the top of the spray terminal 401. The spray printer 403 is started and the paint is sent along the paint tube 402 to the end of the spray terminal 401, and finally sprayed downward along the spray terminal 401 to the outer surface of the packaging bag, thereby completing the required spraying process. A top frame 406 is provided on the top of the vertical rod 405, and the inner wall of the top frame 406 is mutually clamped with the outer surface of the paint tube 402. The top frame 406 installs and fixes the position of the paint tube 402, thereby further improving the stability of the paint tube 402.

[0057] When the conveyor belt 101 drives the packaging bags to be continuously transported, if there are dust and impurities on the outer surface of the conveyor belt 101 or the packaging bags, it will not only hinder the backward transmission of the packaging bags, but also affect the coding effect of the spray terminal 401 on the outer surface of the packaging bags; and when coding on packaging bags of different thicknesses, the prior art lacks the function of adjusting the height of the inclined plate 207, which causes the inclined plate 207 to hinder the normal backward transmission of the packaging bags and affects the subsequent cleaning and coding effects; and when the packaging bag is raised and tilted at the coding position, if the coding position of the packaging bag cannot be corrected, the coding position of the spray terminal 401 on the surface of the packaging bag will be offset synchronously, resulting in blurred coding, which cannot meet the actual coding needs.

[0058] In order to solve the above problems, the automatic coding device for food packaging bags is used in actual use. Figure 1The front-to-back direction of the action is limited, that is, the packaging bag moves to the right with the conveyor belt 101 after being loaded on the left side. First, the height of the movable plate 301 is adjusted, that is, the vertical limiter 408 is moved and the height of the movable plate 301 is adjusted, and the horizontal limiter 409 is moved and the front-to-back direction of the movable plate 301 is adjusted. When the movable plate 301 moves to a suitable position, the nozzle limiter 410 is adjusted and the position of the movable plate 301 is limited. Then, the controller controls the drive motor 107 to start, and the drive motor 107 drives the active roller 108 to rotate. The active roller 108 Cooperating with the driven roller 109, the conveyor belt 101 is driven to be transported backward. At the same time, the air pump 314 is started and the cleaning gas inside the cleaning air box 313 is extracted, and the cleaning gas is passed into the cleaning nozzle 304 end along the air inlet hose 312, and finally sprayed out along the cleaning nozzle 304 and the conveyor belt 101 and the outer surface of the packaging bag are cleaned by wind, so as to ensure the stability and cleanliness of the packaging bag transmission and coding. At the same time, the controller controls the inkjet printer 403 to start and send the paint along the paint pipe 402 to the inside of the spray terminal 401, so as to wait for the subsequent coding process on the outer surface of the packaging bag.

[0059] After that, the packaging bag is manually placed on the conveyor belt 101 at intervals. Under the guidance of the splicing rod 206, the packaging bag slides downward to between the two inclined plates 207, and reaches below the distance sensor 302 under the continuous conveying action of the conveyor belt 101. The distance sensor 302 detects that the distance value decreases and reaches the preset distance value, which means that the height of the packaging bag meets the requirement. The packaging bag continues to move to below the cleaning nozzle 304, and the cleaning nozzle 304 sprays cleaning gas downward and performs wind cleaning on the top of the packaging bag, thereby The cleanliness and stability of subsequent coding of the packaging bag are improved. At the same time, the cleaning gas moves to the front and rear sides under the guidance of the packaging bag, and finally reaches the end of the inclined plate 207. At this time, the cleaning gas is guided by the inclined plate 207 and moves obliquely upward and reaches the bottom of the movable plate 301, thereby effectively performing wind cleaning on the bottom of the movable plate 301, and correspondingly improving the wind cleaning effect under the spray terminal 401, avoiding long-term coding paint under the spray terminal 401 causing contamination of the bottom of the spray terminal 401, and affecting the subsequent coding effect of the packaging bag.

[0060] When the packaging bag moves with the conveyor belt 101 and leaves under the cleaning nozzle 304, the cleaning gas sprayed from the cleaning nozzle 304 acts on the top of the conveyor belt 101. With the help of the cleaning gas, the outer surface of the conveyor belt 101 can be effectively cleaned by wind. At the same time, since there is no packaging bag at this position of the conveyor belt 101, there is a gap between the conveyor belt 101 and the inclined plate 207. Therefore, the cleaning gas can be discharged in the forward and backward directions along the gap between the conveyor belt 101 and the inclined plate 207, thereby effectively avoiding the influence of the cleaning gas on the normal transmission of the packaging bag.

[0061] When the packaging bag bulges in the front-to-back direction, the conveyor belt 101 drives the packaging bag to move to the bottom of the multiple distance sensors 302, and the distance value detected by the distance sensor 302 decreases. When the distance value detected by the distance sensor 302 at the middle position is the smallest, and the distance values ​​detected by the distance sensors 302 on both sides gradually increase along the middle position, it means that the packaging bag just bulges at the coding position, and the controller controls the current of the two electromagnetic rings 306 to increase, and the electromagnetic rings 306 apply magnetic repulsion to the magnetic slider 307 and drive the magnetic slider 307 to squeeze the reset spring 309 and move downward along the bottom groove 305. The magnetic slider 307 drives the moving rod 308 to move downward, the moving rod 308 drives the swing plate 303 to move downward, the swing plate 303 drives the cleaning nozzle 304 to move downward, and the distance between the cleaning nozzle 304 and the packaging bag is reduced. The wind force of the gas sprayed from the cleaning nozzle 304 on the raised position of the packaging bag increases, so that not only the outer surface of the packaging bag can be cleaned by wind, but also the raised position of the packaging bag can be exerted with the help of the wind force, so that the packaging bag moves to both sides and restores to a flat state, further improving the flatness and clarity of the subsequent coding on the outer surface of the packaging bag by the spray terminal 401.

[0062] When the magnetic slider 307 moves downward inside the bottom groove 305, the air pressure inside the bottom groove 305 decreases. Under the action of negative pressure, the gas inside the connecting hole 203 enters the bottom groove 305 along the connecting hose 315, and the sliding rod 205 squeezes the connecting spring 204 and moves upward along the connecting hole 203. The sliding rod 205 drives the inclined plate 207 to move upward through the splicing rod 206. The squeezing force applied by the bottom of the inclined plate 207 on the top of the packaging bag is reduced, and the wind force applied by the gas sprayed from the cleaning nozzle 304 on the raised position of the packaging bag is further improved to further improve the effect of restoring the flatness of the packaging bag to the front and rear sides.

[0063] Afterwards, when the packaging bag returns to a flat state, the distance values ​​detected by the multiple distance sensors 302 continue to increase and increase again to the preset distance value. In this case, the controller controls the power-on current of the electromagnetic ring 306 to restore the initial value, and the magnetic repulsion force of the electromagnetic ring 306 on the magnetic slider 307 is reduced. Under the elastic force of the reset spring 309, the magnetic slider 307 is driven to move upward and return to its original position. The magnetic slider 307 drives the swing plate 303 to move upward and return to its original position through the moving rod 308. The swing plate 303 drives the cleaning nozzle 304 to move upward and return to its original position. The wind cleaning action applied by the cleaning nozzle 304 to the outer surface of the packaging bag and the conveyor belt 101 repeats the initial state, and the packaging bag continues to be conveyed backward with the conveyor belt 101.

[0064] However, when the raised packaging bag is actually conveyed above the conveyor belt 101, the distance values ​​detected by the multiple distance sensors 302 are not equal, and the protrusion is not located in the middle position, so the distance value detected by the middle distance sensor 302 is not the minimum value, that is, when the protrusion is located at the front end, the distance value detected by the distance sensor 302 located at the front side is the minimum value, and the distance values ​​detected by the distance sensors 302 on the front and rear sides of the corresponding position gradually increase along the minimum value toward the front and rear sides, then the controller controls the electromagnetic ring 306 to increase the current, and the current of the electromagnetic ring 306 on the front side is less than the current of the electromagnetic ring 306 on the rear side, and under the magnetic repulsion force exerted by the electromagnetic ring 306 on the magnetic slider 307, the magnetic slider 307 is driven to squeeze the reset spring 309 and move forward. The magnetic slider 307 moves downward, and the swing plate 303 is driven to move downward by the moving rod 308. However, since the distance the front moving rod 308 moves downward is smaller than the distance the rear moving rod 308 moves downward, the swing plate 303 is driven to tilt toward the front side under the hinged action of the hinged seat 311. The swing plate 303 drives the cleaning nozzle 304 to tilt toward the front side, and the bottom output end of the cleaning nozzle 304 is opposite to the minimum distance detected by the front distance sensor 302, that is, the bottom output end of the cleaning nozzle 304 is opposite to the top of the protrusion. Under the action of the cleaning gas sprayed by the cleaning nozzle 304, not only the outer surface of the packaging bag can be cleaned by wind, but also a force can be applied to the top of the protrusion, thereby causing the protrusion to move toward the rear side and restore to the horizontal state.

[0065] When the magnetic slider 307 moves downward in the bottom groove 305, the pressure inside the bottom groove 305 decreases, and the sliding rod 205 is driven to move upward along the connecting hole 203 under the negative pressure inside the bottom groove 305. The sliding rod 205 drives the inclined plate 207 to move upward through the splicing rod 206. Since the rear moving rod 308 moves downward along the bottom groove 305 for a greater distance than the front moving rod 308, the rear sliding rod 205 moves upward along the connecting hole 203 for a greater distance than the front sliding rod 205, and the rear inclined plate 207 moves upward for a greater distance than the front inclined plate 207 moves upward. Moving distance, at this time, with the cleaning gas sprayed from the cleaning nozzle 304, the protrusion on the front side of the packaging bag can move toward the rear side and continuously restore to the level. When the distance values ​​detected by multiple distance sensors 302 increase to the preset distance values, it means that the packaging bag has been restored to the flatness. The controller controls the power-on current of the electromagnetic ring 306 to restore the initial value, and the swing plate 303 drives the cleaning nozzle 304 to move upward and swing in the opposite direction to the initial horizontal state, and the two inclined plates 207 move downward to the initial height, so as to continue the cleaning and coding processes for subsequent packaging bags.

[0066] When the thickness of the packaging bag increases, when the packaging bag is transported backward on the conveyor belt 101 and reaches below the distance sensor 302, the distance values ​​detected by the multiple distance sensors 302 are all reduced, indicating that the thickness of the packaging bag increases. The controller first controls the current of the electromagnetic ring 306 to increase. The electromagnetic ring 306 drives the magnetic slider 307 to squeeze the reset spring 309 and drive the moving rod 308 to move upward through the magnetic repulsion force on the magnetic slider 307. The moving rod 308 drives the cleaning nozzle 304 to move downward through the swing plate 303. The distance between the cleaning nozzle 304 and the top of the packaging bag is reduced, thereby improving the wind cleaning effect of the cleaning nozzle 304 on the outer surface of the packaging bag with increased thickness, and the magnetic slider 307 moves downward. At this time, the pressure in the bottom groove 305 decreases, and under the action of negative pressure, the gas inside the connecting hole 203 is extracted along the connecting hose 315 into the bottom groove 305, and the sliding rod 205 squeezes the connecting spring 204 inside the connecting hole 203 and moves upward, and the sliding rod 205 drives the inclined plate 207 to move upward through the splicing rod 206, and the squeezing force of the bottom of the inclined plate 207 on the packaging bag is reduced, thereby avoiding excessive squeezing friction between the inclined plate 207 and the packaging bag, which causes the packaging bag to be unable to be stably transported backward with the conveyor belt 101, and adjusting the vertical limiter 408, and correspondingly adjusting the height of the cross bar 407, thereby realizing the height value of the movable plate 301 and the internal spray terminal 401, thereby improving the coding accuracy and clarity of the spray terminal 401 on the outer surface of the packaging bag.

[0067] And when the inclined plate 207 moves up and down along with the sliding rod 205 through the splicing rod 206, the cleaning gas sprayed by the cleaning nozzle 304 moves to the front and rear sides to the end of the inclined plate 207, the wind cleaning position applied to the movable plate 301 changes under the guidance of the inclined plate 207, thereby improving the wind swing cleaning effect on the bottom of the movable plate 301 and the bottom of the spray terminal 401, with stronger adaptability, higher stability and better cleaning effect.

[0068] The automatic coding device for food packaging bags has high coding efficiency, good coding effect, high coding accuracy, is suitable for adaptive coding of packaging bags of different heights, has strong adaptability, high stability, simple operation, strong controllability, and is suitable for the coding needs of mass production of packaging bags; at the same time, before coding the packaging bags, the outer surfaces of the packaging bags and the conveyor belt 101 can be cleaned by wind, and the clean gas can be guided to the bottom of the movable plate 301 and the spraying terminal 401 by the wind guiding effect of the inclined plate 207, so as to improve the neatness of the packaging bags and avoid the pollution of the subsequent coding of the packaging bags caused by the existing dust and impurities; and when the packaging bags are sprayed When there is a protrusion at the coating position, the height and tilt direction of the cleaning nozzle 304 are adaptively adjusted, so that the cleaning nozzle 304 performs wind correction on the protruding position, and cooperates with the up and down movement of the inclined plate 207 to improve the flatness and spraying accuracy of the packaging bag; and when the thickness of the packaging bag changes, the cleaning nozzle 304 moves up and down and improves the cleaning and correction effect on the packaging bag, and the inclined plate 207 moves up and down accordingly, effectively avoiding the change in position of the inclined plate 207 due to the squeezing friction when the packaging bag is transported backward on the conveyor belt 101, thereby improving the transportation stability of the packaging bag.

[0069] The coding method according to the automatic coding device for food packaging bags includes the following steps:

[0070] S1. The packaging bag is conveyed backward on the conveyor belt 101, the inclined plate 207 limits the upper part of the packaging bag, the distance value detected by the distance sensor 302 reaches the preset distance value, the cleaning nozzle 304 sprays cleaning gas downward, and the spray terminal 401 sprays the code on the upper part of the packaging bag.

[0071] S2. When the distance value detected by the middle position distance sensor 302 decreases, and the distance values ​​detected by the distance sensors 302 on the front and rear sides are both greater than the distance value detected by the middle position distance sensor 302, the moving rod 308 moves downward along the bottom groove 305, and the moving rod 308 drives the cleaning nozzle 304 to move downward through the swing plate 303. The distance between the cleaning nozzle 304 and the packaging bag decreases, and the gas inside the connecting hole 203 enters the bottom groove 305 along the connecting hose 315. The sliding rod 205 moves upward along the connecting hole 203, and the sliding rod 205 drives the inclined plate 207 to move upward through the splicing rod 206.

[0072] S3. When the distance value detected by the front side distance sensor 302 decreases, and the distance values ​​detected by the distance sensors 302 on the front and rear sides are greater than the distance value detected by the front side position distance sensor 302, the rear side moving rod 308 moves downward a distance greater than the front side moving rod 308 moves downward, the swing plate 303 drives the cleaning nozzle 304 to tilt forward, and the rear end sliding rod 205 moves upward along the connecting hole 203 The distance increases, the rear end sliding rod 205 drives the inclined plate 207 to move upward through the splicing rod 206. The distance is greater than the distance the front side inclined plate 207 moves upward.

[0073] S4. When the thickness of the packaging bag increases, the distance values ​​detected by the multiple distance sensors 302 all decrease, the moving rod 308 moves downward along the bottom groove 305, and the moving rod 308 drives the cleaning nozzle 304 to move downward through the swing plate 303. The distance between the cleaning nozzle 304 and the packaging bag decreases, and the gas inside the connecting hole 203 enters the bottom groove 305 along the connecting hose 315. The sliding rod 205 moves upward along the connecting hole 203, and the sliding rod 205 drives the inclined plate 207 to move upward through the splicing rod 206, and the movable plate 301 moves upward.

[0074] By further limiting the coding method, the coding effect can be improved and the coding efficiency can be guaranteed.

[0075] It should be noted that, in this article, relational terms such as first and second, etc. are only used to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Moreover, the terms "include", "comprise" or any other variants thereof are intended to cover non-exclusive inclusion, so that a process, method, article or device including a series of elements includes not only those elements, but also other elements not explicitly listed, or also includes elements inherent to such process, method, article or device.

[0076] Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present invention, and that the scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. An automatic coding device for food packaging bags, comprising a transmission assembly (1), characterized in that: A limit assembly (2) is provided above one side of the transmission assembly (1), a coding assembly (4) is provided above the transmission assembly (1), and a calibration assembly (3) is provided on a side of the coding assembly (4) close to the limit assembly (2); The transmission assembly (1) comprises two brackets (102), and a conveyor belt (101) is transmission-connected between the two brackets (102); The limiting assembly (2) comprises a fixing plate (201), two communicating holes (203) are symmetrically arranged inside the fixing plate (201), a sliding rod (205) is sealingly and slidably connected inside the communicating hole (203), and an inclined plate (207) is arranged at the bottom of the sliding rod (205) via a splicing rod (206); The calibration component (3) comprises a movable plate (301), a plurality of distance sensors (302) are evenly arranged on a side of the movable plate (301) close to the fixed plate (201), two bottom grooves (305) are symmetrically arranged at the bottom of the movable plate (301) and located on a side of the distance sensor (302) away from the fixed plate (201), a moving rod (308) is slidably connected inside the bottom groove (305), the bottom of the moving rod (308) is movably connected to a swing plate (303) via a hinge seat (311), a cleaning nozzle (304) is penetrated at the axis of the swing plate (303), a connecting hose (315) is connected to the top of the bottom groove (305), and the other end of the connecting hose (315) is connected to the top of the connecting hole (203); The coding component (4) comprises a coding terminal (401).

2. The automatic coding device for food packaging bags according to claim 1 is characterized in that: A controller is provided on one side of the bracket (102), and the controller electrically controls each electrical component. A side plate (106) is provided on the outer wall of the bracket (102), and a driving motor (107) is provided on the top of the side plate (106). The output end of the driving motor (107) passes through the bracket (102) and is provided with an active roller (108). The outer surface of the active roller (108) is rotatably connected to the inner wall of the bracket (102) through a bearing, and the outer surface of the active roller (108) is connected to the inner part of the conveyor belt (101) through transmission.

3. The automatic coding device for food packaging bags according to claim 1 is characterized in that: The inner wall of the other end of the bracket (102) is rotatably connected to a driven roller (109) via a bearing, and the outer surface of the driven roller (109) is internally connected to the other end of the conveyor belt (101) in a transmission manner. A recycling box (103) is provided at one end of the conveyor belt (101) away from the fixed plate (201), and a discharge port (110) is provided at the top of the recycling box (103) on a side close to the conveyor belt (101). A plurality of movable frames (104) are evenly arranged at the bottom of the recycling box (103), and a moving wheel is arranged at the bottom of the movable frame (104). A plurality of legs (105) are evenly arranged at the bottom of the bracket (102), and a buffer pad is arranged at the bottom of the legs (105).

4. The automatic coding device for food packaging bags according to claim 1 is characterized in that: Two mounting rods (202) are symmetrically arranged on both sides of the fixed plate (201), the bottom of the mounting rods (202) is fixedly connected to the top of the bracket (102), the connecting hole (203) is an inverted Z-shaped structure, the inclined direction of the inclined plate (207) is directly opposite to the bottom of the movable plate (301), and a connecting spring (204) is arranged on the top of the sliding rod (205), and the top of the other end of the connecting spring (204) is fixedly connected to the inner top of the connecting hole (203).

5. The automatic coding device for food packaging bags according to claim 1 is characterized in that: The movable plate (301) is movably connected to the top of the conveyor belt (101); the distance sensor (302) is used to detect the distance value between the bottom of the movable plate (301) and the top of the conveyor belt (101); an electromagnetic ring (306) is provided at the inner top of the bottom groove (305); a magnetic slider (307) is slidably connected inside the bottom groove (305); the bottom of the magnetic slider (307) is fixedly connected to the top of the moving rod (308); and the magnetism between the facing end faces of the electromagnetic ring (306) and the magnetic slider (307) is the same.

6. The automatic coding device for food packaging bags according to claim 5, characterized in that: A retaining ring (310) is provided at the bottom of the inner wall of the bottom groove (305), and a return spring (309) is provided at the top of the retaining ring (310). The top of the return spring (309) is fixedly connected to the bottom of the magnetic slider (307). The return spring (309) is located on the outer surface of the moving rod (308). The outer surface of the magnetic slider (307) is sealed and slidably connected to the inner wall of the bottom groove (305), and the inner wall of the retaining ring (310) is sealed and slidably connected to the outer surface of the moving rod (308).

7. The automatic coding device for food packaging bags according to claim 1, characterized in that: A vertical rod (405) is provided on one side of the bracket (102), and a vertical limiter (408) is slidably connected to the outer surface of the vertical rod (405), and a transverse limiter (409) is provided on one side of the vertical limiter (408), and a cross rod (407) is slidably connected inside the transverse limiter (409), and the outer surface of the cross rod (407) is slidably connected to the inside of the movable plate (301), and a nozzle limiter (410) is provided on one side of the movable plate (301).

8. The automatic coding device for food packaging bags according to claim 7, characterized in that: A clean air box (313) is provided on one side of the bracket (102), an air pump (314) is provided on the top of the clean air box (313), an input end of the air pump (314) is connected to the clean air box (313), an output end of the air pump (314) is provided with an air intake hose (312), the other end of the air intake hose (312) passes through the movable plate (301) and is connected to the top of the cleaning nozzle (304), and a limiting frame (411) is provided on one side of the vertical rod (405), the inner wall of the limiting frame (411) and the outer surface of the air intake hose (312) are mutually clamped.

9. The automatic coding device for food packaging bags according to claim 7, characterized in that: The spray terminal (401) is fixedly connected to the inside of the movable plate (301), and a support frame (404) is provided on one side of the bracket (102). A spray printer (403) is provided on the top of the support frame (404). A paint tube (402) is provided at the output end of the spray printer (403). The other end of the paint tube (402) is connected to the top of the spray terminal (401). A top frame (406) is provided on the top of the vertical rod (405), and the inner wall of the top frame (406) is mutually engaged with the outer surface of the paint tube (402).

10. The coding method of the automatic coding device for food packaging bags according to claim 1, characterized in that: The following steps are involved: S1, the packaging bag is conveyed backward on the conveyor belt (101), the inclined plate (207) limits the upper part of the packaging bag, the distance value detected by the distance sensor (302) reaches the preset distance value, the cleaning nozzle (304) sprays cleaning gas downward, and the spray terminal (401) sprays a code on the upper part of the packaging bag; S2, when the distance value detected by the distance sensor (302) at the middle position decreases, and the distance values ​​detected by the distance sensors (302) at the front and rear sides are both greater than the distance value detected by the distance sensor (302) at the middle position, the moving rod (308) moves downward along the bottom groove (305), and the moving rod (308) drives the cleaning nozzle (304) to move downward through the swing plate (303), and the distance between the cleaning nozzle (304) and the packaging bag decreases, and the gas inside the connecting hole (203) enters the bottom groove (305) along the connecting hose (315), and the sliding rod (205) moves upward along the connecting hole (203), and the sliding rod (205) drives the inclined plate (207) to move upward through the splicing rod (206); S3, when the distance value detected by the distance sensor (302) on the front side decreases, and the distance values ​​detected by the distance sensors (302) on the front and rear sides are both greater than the distance value detected by the distance sensor (302) on the front side, the distance the moving rod (308) on the rear side moves downward is greater than the distance the moving rod (308) on the front side moves downward, the swing plate (303) drives the cleaning nozzle (304) to tilt forward, and the distance the sliding rod (205) on the rear end moves upward along the connecting hole (203) increases, and the sliding rod (205) on the rear end drives the inclined plate (207) to move upward through the splicing rod (206) to move upward a distance greater than the distance the inclined plate (207) on the front side moves upward; S4. When the thickness of the packaging bag increases, the distance values ​​detected by the multiple distance sensors (302) all decrease, the moving rod (308) moves downward along the bottom groove (305), the moving rod (308) drives the cleaning nozzle (304) to move downward through the swing plate (303), the distance between the cleaning nozzle (304) and the packaging bag decreases, the gas inside the connecting hole (203) enters the bottom groove (305) along the connecting hose (315), the sliding rod (205) moves upward along the connecting hole (203), the sliding rod (205) drives the inclined plate (207) to move upward through the splicing rod (206), and the movable plate (301) moves upward.

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