Code printing system and device for filling equipment

Abstract

The invention discloses a code printing system and device for filling equipment. The code printing system comprises code printing equipment, identification equipment and sorting equipment which are sequentially arranged on cover conveying equipment; the code printing equipment is used for printing codes on the bag covers conveyed by the conveying system; the identification equipment is used for identifying, coding and spraying codes on the bag covers subjected to code printing; and the sorting equipment is used for sorting the bag covers, removing unqualified bag covers and feeding qualified bag covers into the cover screwing equipment. A code printing system and filling equipment are organically combined, and the functions of identifying and removing unqualified bag covers are added, so that the bag covers with deformed appearances or damaged safety rings and bag covers with coding problems such as missing codes, residual codes, fuzziness and information errors generated in the movable code printing process can be identified and removed.

Description

Technical Field

[0001] The invention relates to the technical field of filling equipment and machinery, and in particular to a coding system and device for soft packaging bag filling equipment. Background Art

[0002] At present, the soft product packaging market covers many fields such as food and beverage, pharmaceutical chemicals, and building decoration, and its application is very extensive. The soft product packaging and filling equipment has also developed from semi-automation to full automation. The soft packaging bag filling equipment has become the most commonly used equipment. The current filling equipment on the market is often an independent system. Usually, the product packaging is coded before the bag cover is filled, and the coding equipment needs to be purchased separately and installed on the outside of the filling equipment. The coding machine terminal codes the empty packaging bags one by one as the turntable runs. This coding method often brings outstanding technical problems. Since the coding process of the packaging bag is carried out in the dynamic state of the market, the stability is poor, and it is very easy to cause the coding information to be missing, residual, blurred, and other problems. These problems cannot be identified and eliminated by the back-end of the product system. Once they enter the market, they will be complained by customers, causing economic losses to the company and affecting the company's brand reputation. In view of the above problems, how to organically combine the coding system with the filling equipment, code the bag cover after the equipment fills the material and before the bag cover is assembled, and at the same time increase the recognition and rejection function of unqualified bag covers, is the technical problem to be solved by the present invention. Summary of the invention

[0003] A series of simplified concepts are introduced in the Summary of the Invention, which will be further described in detail in the Detailed Description of the Invention. The Summary of the Invention does not mean to attempt to define the key features and essential technical features of the claimed technical solution, nor does it mean to attempt to determine the scope of protection of the claimed technical solution.

[0004] In order to at least partially solve the above problems, the present invention provides a coding system for a filling device, comprising: a cap feeding device, on which a coding device, an identification device and a sorting device are sequentially arranged;

[0005] Coding equipment, used to code the bag cover transmitted through the conveying system;

[0006] Identification equipment, used for identifying, encoding and spraying the coded bag cover;

[0007] The sorting equipment is used to sort the bag caps, remove unqualified bag caps, and send qualified bag caps to the capping equipment.

[0008] Preferably, a defective cap collecting device is provided on the rear side of the sorting device.

[0009] A coding device for filling equipment comprises a cover feeding device and a qualified bag cover transfer device, wherein the cover feeding device and the qualified bag cover transfer device are connected or docked via a conveying system, and a coding device, an identification device and a sorting device are sequentially arranged on at least one side of the conveying system along the bag cover transport direction; signal interaction and control are realized between the identification device and the sorting device through PLC control processing.

[0010] Preferably, the conveying system includes a motor, a conveyor belt and a transfer mechanism, the motor provides power for the conveyor belt, the feed end of the conveyor belt is connected to the discharge end of the cover feeding device, the discharge end of the conveyor belt is connected to the feed end of the qualified bag cover transfer device, the coding device and the identification device are both located above the conveyor belt, the sorting device is located on both sides of the conveyor belt and below the identification device, and is used to remove unqualified bag covers from the conveyor belt.

[0011] Preferably, the coding device comprises a coding machine.

[0012] Preferably, the identification device comprises a camera.

[0013] Preferably, the sorting device includes an air blowing device for removing unqualified bag covers from the conveying system to the unqualified cover collecting device, and the signal interaction and control between the identification device and the air blowing device are realized through PLC control processing.

[0014] Preferably, the blowing device of the sorting equipment includes an air source, an air pipe, a solenoid valve and a nozzle. The nozzle is connected to the air source through the air pipe. The solenoid valve is arranged on the air source, or the air pipe, or the nozzle. The signal interaction and control between the air source and / or the solenoid valve and the identification equipment are realized through PLC control processing.

[0015] Preferably, the unqualified bag cover collecting device comprises an unqualified bag cover collecting box for collecting unqualified bag covers rejected from the conveying system.

[0016] Preferably, the unqualified cover collecting device further comprises a collecting channel, the feed end of the collecting channel and the blowing nozzle are respectively located on both sides of the conveying system and arranged opposite to each other, and the discharge end of the collecting channel is connected to the unqualified bag cover collection box.

[0017] Compared with the prior art, the present invention has at least the following beneficial effects:

[0018] Through the design of the above structure, the coding system is organically combined with the filling equipment. The bag caps are coded after the filling equipment fills the bag caps and before the bag caps are assembled, and the identification and rejection functions of unqualified bag caps are added, so that the present invention can identify and reject bag caps with deformed appearance or damaged safety rings, as well as bag caps with coding problems such as missing codes, residual codes, blur, and information errors generated during the mobile coding process. The present invention is integrated with the filling equipment, solving the problem of bag cap deformation and the inability to identify and reject damaged safety rings, and avoiding the filling equipment being affected by deformed bag caps or bag caps with damaged safety rings, resulting in leakage due to improper capping.

[0019] The coding system and device for filling equipment described in the present invention, other advantages, objectives and features of the present invention will be reflected in part through the following description, and in part will be understood by technicians in this field through research and practice of the present invention. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] The accompanying drawings are used to provide a further understanding of the present invention and constitute a part of the specification. Together with the embodiments of the present invention, they are used to explain the present invention and do not constitute a limitation of the present invention. In the accompanying drawings:

[0021] Figure 1 It is a schematic diagram of the coding system for filling equipment according to the present invention.

[0022] Figure 2 It is a schematic diagram of the coding device for filling equipment according to the present invention.

[0023] Figure 3 for Figure 2 Schematic diagram of point A in the middle

[0024] Figure 4 Schematic diagram of the vibration plate adjusting the bag cover to the coding posture and sending it to the conveying system.

[0025] Figure 5 The invention discloses an identification method for an identification device.

[0026] Figure 6 Schematic diagram of the impact on both sides of the unqualified bag cover when the blowing nozzle adopts the first embodiment (the dotted line is the initial position of the bag cover on the conveyor belt).

[0027] Figure 7 It is a schematic diagram of a second embodiment of the mouthpiece.

[0028] Figure 8 Schematic diagram of A in the second embodiment of the mouthpiece.

[0029] Fig. 9Schematic diagram of the impact on both sides of the unqualified bag cover when the second embodiment is adopted for the blowing nozzle (the dotted line is the initial position of the bag cover on the conveyor belt).

[0030] Fig.10 Schematic diagrams of normal coding (shown in A), missing codes (shown in B), and codes not being in the same plane (shown in C).

[0031] Fig.11 Schematic diagrams of different top surfaces of the bag cover (A is the top view, B is the main view).

[0032] In the figure: 101 storage box, 102 conveyor, 103 first driving device, 104 vibration plate, 200 qualified bag cover transfer device, 300 first top surface, 400 second top surface, 1 coding device, 2 identification device, 3 conveyor belt, 4 blowing nozzle, 41 mounting surface, 42 air outlet pipe, 5 collecting channel DETAILED DESCRIPTION

[0033] The present invention is further described in detail below in conjunction with the accompanying drawings and embodiments so that those skilled in the art can implement the invention with reference to the description.

[0034] It should be understood that the terms such as “having”, “including” and “comprising” used herein do not exclude the existence or addition of one or more other elements or combinations thereof.

[0035] As shown in the figure, the present invention provides a coding system for a filling device, comprising: a cap feeding device 100, on which a coding device 1, an identification device 2 and a sorting device are sequentially arranged;

[0036] Coding device 1, used for coding the bag cover transmitted through the conveying system;

[0037] Identification device 2, used for identifying, encoding and spraying the coded bag cover;

[0038] The sorting equipment is used to sort the bag caps, remove unqualified bag caps, and send qualified bag caps to the capping equipment.

[0039] A defective cap collecting device is provided on the rear side of the sorting equipment.

[0040] A coding device for a filling device, comprising a cap feeding device 100 and a qualified bag cap transfer device 200;

[0041] The cap feeding equipment includes feeding equipment and adjusting equipment;

[0042] A feeding device is used to feed bag covers to the adjusting device; usually the bag covers are bag covers with safety rings. The feeding device consists of a storage box 101 and a conveyor 102 extending into the storage box 101. A first driving device 103 is provided on the conveyor 102. One end of the conveyor 102 extends into the storage box 101, and the other end extends to the top of the adjusting device. A dust cover can be provided on the storage box 101 to prevent dust and impurities from entering.

[0043] The adjusting device is used to convey the bag cover to the conveying system and adjust the bag cover to the coding posture; the adjusting device is composed of a vibration plate 104 and a second driving device arranged on the vibration plate 104, the second driving device is used to provide power for the vibration plate 104, and the discharge end of the vibration plate 104 is connected to the feed end of the conveying system. The adjusting device can also be any device that can adjust the bag cover to open downward.

[0044] The qualified bag cover transfer device 200 is used to transfer the qualified bag covers with no problems in coding and inkjet printing to the capping equipment.

[0045] The cover feeding device 100 is connected or docked with the qualified bag cover transfer device 200 through a conveying system. On at least one side of the conveying system, a coding device 1, an identification device 2 and a sorting device are sequentially provided along the bag cover transportation direction; the signal interaction and control between the identification device 2 and the sorting device are realized through PLC control processing.

[0046] Furthermore, a conveying system is used to send the bag covers in the coding posture from the adjustment device to the coding device 1, the identification device 2 and the sorting device, and then to the qualified bag cover transfer device 200; the conveying system includes a motor, a conveyor belt 3 and a transfer mechanism, the motor provides power for the conveyor belt 3, the feed end of the conveyor belt 3 is connected to the discharge end of the cover feeding device 100, the discharge end of the conveyor belt 3 is connected to the feed end of the qualified bag cover transfer device 200, the coding device 1 and the identification device 2 are both located above the conveyor belt 3, the sorting device is located on both sides of the conveyor belt 3 and below the identification device 2, and is used to remove unqualified bag covers from the conveyor belt 3.

[0047] Further, the coding device 1 is used to code the bag cover in the coding posture on the conveying system, and the coding device 1 is usually a coding machine;

[0048] The identification device 2 is used to identify whether there are problems with the coding and inkjet coding of the bag cover after coding on the conveying system. The identification device 2 is a camera or other visual acquisition device.

[0049] Furthermore, the sorting device is used to remove unqualified bag covers after the identification device 2 identifies that there is a problem with the bag cover coding or inkjet coding; the sorting device includes a blowing device, which is used to remove unqualified bag covers from the conveying system to the unqualified cover collection device, and the identification device 2 and the blowing device are processed by PLC control to achieve signal interaction and control. The blowing device of the sorting device includes an air source, an air pipe, a solenoid valve and a blowing nozzle 4, the blowing nozzle 4 is connected to the air source through the air pipe, the solenoid valve is arranged on the air source, or the air pipe, or the blowing nozzle 4, and the air source and / or the solenoid valve and the identification device are processed by PLC control to achieve signal interaction and control.

[0050] Furthermore, the unqualified bag cover collecting device comprises an unqualified bag cover collecting box for collecting unqualified bag covers rejected from the conveying system.

[0051] Furthermore, the unqualified cover collecting device also includes a collecting channel 5, the feeding end of the collecting channel 5 and the blowing nozzle 4 are respectively located on both sides of the conveying system and are arranged opposite to each other, and the discharging end of the collecting channel 5 is connected to the unqualified bag cover collection box.

[0052] Furthermore, in order to install the present invention on a filling device, a plurality of support columns are usually provided on the filling device to support and fix the various devices of the present invention.

[0053] Working principle of the above technical solution: The process of coding, identification and rejection of the present invention is as follows:

[0054] Step 1: Preparation before coding; determine the information content and format of the coding.

[0055] The second step: loading and conveying; put the bag cover into the storage box 101, close the lid, and after turning on the device, the bag cover is conveyed to the silo of the vibrating disk 104 through the conveyor 102. The silo in the vibrating disk 104 is subjected to reciprocating torsion and slight vibration up and down under the alternating action of the electromagnet and the supporting plate spring. The bag cover in the silo moves upward from the bottom of the silo along the spiral cover supply slide, and is automatically queued and oriented at the same time. Due to the vibration during the movement, only the bag cover with the opening upward can smoothly reach the cover outlet at the upper part of the silo, and smoothly enter the transmission belt of the vibrating disk 104 from the cover outlet. The bag cover with the opening upward is then turned 180° along the transmission belt to become a state with the opening downward (coding posture), and finally sent to the conveyor belt 3 through the transmission belt, and then transported to the bottom of the coding device 1 for coding in a single form through the transfer mechanism of the conveyor belt 3.

[0056] Step 3: Coding: The coding device 1 codes at a suitable position of the bag cover according to the set information.

[0057] Step 4: Photographing and identification: After the coding is completed, it is transported to the identification device 2 via the conveyor belt 3 for photographing and identification.

[0058] Step 5: nozzle removal; after taking photos for identification, the nozzle 4 automatically removes unqualified bag covers (missing code, incomplete code, blur, information error, bag cover deformation, safety ring deformation, damage), and the unqualified bag covers are collected through the collection channel 5 to the unqualified bag cover collection device.

[0059] Step 6: delivering qualified bag covers; the qualified bag covers are transported one by one in an orderly manner to the top of the large plate of the filling equipment through the qualified bag cover transfer device 200, and the bag covers are pushed and put on the bag mouths that have completed filling, waiting for capping.

[0060] The beneficial effects of the above technical solution: through the design of the above structure, the coding system is organically combined with the filling equipment, and the bag cap is coded after the filling equipment fills the bag cap and before the bag cap is assembled, and the identification and rejection function of unqualified bag caps is added, so that the present invention can identify and reject bag caps with deformed appearance or damaged safety rings, as well as bag caps with coding problems such as missing codes, residual codes, blur, and information errors generated during the mobile coding process. The present invention is integrated with the filling equipment, solving the problem of bag cap deformation and the inability to identify and reject damaged safety rings, and avoiding the filling equipment being affected by deformed bag caps or bag caps with damaged safety rings, resulting in leakage due to improper capping.

[0061] Further, the steps are as follows:

[0062] S1: Determine the information content and format of the coding;

[0063] S2: Put the bag cover into the feeding device, the feeding device transports the bag cover to the adjusting device, the adjusting device adjusts the bag cover to the coding posture and sends it to the conveying system;

[0064] S3: The bag cover is sent to the coding device 1 by the conveying system, and the coding device 1 codes the bag cover according to the set information;

[0065] S4: After the coding is completed, the bag cover is sent to the identification device 2 by the conveying system. The identification device 2 identifies the coding and inkjet coding of the bag cover and determines whether there is a problem;

[0066] S5: The sorting device removes the unqualified bag covers identified as having problems by the identification device 2 through the conveying system;

[0067] S5': The conveying system transfers the bag caps identified as qualified by the identification device 2 to the capping device.

[0068] Usually, the bag cover has two top surfaces, namely a first top surface 300 (the top surface of the bag cover) and a second top surface 400 (the top surface of the safety ring).

[0069] Furthermore, the identification method of the identification device 2 in step S4 is as follows:

[0070] Take a photo to get the current bag cover photo on the conveyor system;

[0071] Acquire and recognize the coding information, coding position, and appearance information of the bag cover in the photo according to the coding and image recognition technology;

[0072] If any of the coding information, coding position or bag cover appearance information is identified as abnormal, it will be considered as an unqualified bag cover;

[0073] After the identification device 2 confirms that the bag cover is an unqualified bag cover, the sorting device is started to remove the bag cover from the conveying system.

[0074] Traditional visual recognition can only perform simple outer contour recognition and code recognition. Since the bag cover has a safety ring and the top surface is usually an inwardly concave arc, the focus position will be different when taking pictures. Since the bag covers are in a row and pass through the recognition device 2 in sequence, two or three bag covers may be photographed at the same time. If there are multiple bag covers at the same time, the focus position will not be fixed. Since the bag cover is moving while being coded, and under the influence of the air sprayed from the nozzle 4, the bag cover moves during coding, and the code may appear to span across two top surfaces, such as Fig.10 As shown, Fig.10 A is the normal position of the code, B is the missing code (no code), and C is the code spanning the two top surfaces. In the prior art, only two unqualified bag covers A and B can be identified, and the code spanning the two top surfaces cannot be identified. In addition, the current image information collection is shot from top to bottom, and the height information of the bag cover cannot be obtained. If you want to obtain the height information, you need to Fig.11 As shown in B, a camera is added in the direction of the main view to obtain height information, but increasing the number of cameras runs counter to the simplification advocated by the present invention. Therefore, based on the existing technology that solves the coding information recognition and bag cover outer contour recognition, how to use only one image acquisition device to recognize the bag cover height information and the coded position information has become another technical problem that the present invention needs to solve.

[0075] The method to obtain and identify the coding information and coding position is as follows:

[0076] Based on the relative position of the code and the outer contour of the bag flap in the photo;

[0077] Determine whether there is a code on the plane of the bag cover, whether the code is located on a single plane of the bag cover, and whether the code information can be fully displayed on the plane. If there is no code on the plane of the bag cover, the code is located on multiple planes of the bag cover, or the code information cannot be fully displayed on a single plane of the bag cover, it proves that the coding is abnormal, and the bag cover is identified as an unqualified bag cover with abnormal coding;

[0078] Under the premise that there is no coding abnormality, the coding information is proofread to determine whether the coding information is the set information. If the recognized information is inconsistent with the set information, it proves that the coding is abnormal, and the bag cover is identified as an unqualified bag cover with abnormal coding;

[0079] If multiple consecutive bag covers are identified as abnormally printed or encoded, the device stops running and prompts the user to check whether the coding device 1 is normal.

[0080] The method for obtaining and identifying the appearance information of the bag cover is as follows:

[0081] The plane data information of the outer contour of the bag cover is obtained according to the photo, and it is judged whether the data information of the outer contour is within the threshold range. If it exceeds or falls below the threshold, it is proved that the outer dimensions of the bag cover are abnormal, and the bag cover is identified as an unqualified bag cover with a defective appearance;

[0082] Establish a ratio table of the actual distance between the top surfaces of the bag cover (usually the first top surface 300 and the second top surface 400) and the pixels of the bag cover in the corresponding photos under all focal length conditions (because the bag cover is in motion, there may be two or three bag covers in the camera's shooting range at the same time, so it is necessary to shoot when there is only one bag cover, two bag covers at the same time, and three bag covers at the same time, thereby obtaining a ratio table of the actual distance between the top surfaces of the bag cover and the pixels of the bag cover in the corresponding photos under all focal length conditions. For example, when two bag covers are photographed at the same time, the focus needs to fall on the two first top surfaces 300 and the two second top surfaces 400 of the two bag covers respectively to collect data for the ratio table, which is equivalent to focusing at least four times);

[0083] Obtaining the pixel between the focal length and each top surface of the bag cover, and querying the actual distance between the top surfaces of the bag cover in the ratio table according to the pixel between the focal length and each top surface of the bag cover, so as to determine the height of the bag cover;

[0084] Determine whether the actual distance between the top surfaces of the bag cover is within the threshold range. If it exceeds or falls below the threshold, it proves that the height of the bag cover is abnormal, and the bag cover is identified as an unqualified bag cover with a defective appearance;

[0085] If multiple bag covers are identified as unqualified bag covers with defective appearance, the equipment will stop running and prompt the user to conduct random inspection on the bag covers to be coded.

[0086] The reason why the coding device 1 has the problems of missing codes, incomplete codes and blur when coding is usually because the nozzle 4 is easy to blow and displace the bag covers on both sides of the unqualified bag covers when blowing air. In this process, the bag covers that are being coded or ready to be coded may be blown and displaced, thereby causing missing codes, incomplete codes and blur. In order to reduce the influence of the nozzle 4 on the bag covers, we optimize the nozzle 4. In this embodiment, the air outlet end of the nozzle 4 is provided with a concave mounting surface 41, and at least three air outlet pipes 42 are arranged at equal intervals on the mounting surface 41. The central axis of the air outlet pipe 42 is perpendicular to the mounting surface 41, and the extension lines of the central axes of all the air outlet pipes 42 intersect at point A. Point A is located between the air outlet end of the blowing nozzle 4 and the feed end of the collecting channel 5. The concave mounting surface 41 allows the central axes of the air outlet pipes 42 to have an intersection. The compressed air converges at point A, and the wind directions after the intersection and mixing deviate from the central axes of the respective air outlet pipes 42, thereby reducing the wind force that diffuses to both sides of the unqualified bag cover due to impact on the unqualified bag cover, and reducing the influence of the blowing nozzle 4 on the bag cover to be coded.

[0087] In the description of the present invention, it is to be understood that the terms “center”, “longitudinal”, “lateral”, “length”, “width”, “thickness”, “up”, “down”, “front”, “back”, “left”, “right”, “vertical”, “horizontal”, “top”, “bottom”, “inside”, “outside”, “clockwise”, “counterclockwise”, “axial”, “radial”, “circumferential”, etc., indicating orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings, are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the referred device or element must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be understood as limiting the present invention.

[0088] In the present invention, unless otherwise clearly specified and limited, the terms "installed", "connected", "connected", "fixed" and the like should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral one; it can be a mechanical connection, an electrical connection, or communication with each other; it can be a direct connection, or an indirect connection through an intermediate medium, it can be the internal connection of two elements or the interaction relationship between two elements, unless otherwise clearly defined. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0089] Although the embodiments of the present invention have been disclosed as above, they are not limited to the applications listed in the specification and the implementation methods. They can be fully applied to various fields suitable for the present invention. For those familiar with the art, additional modifications can be easily implemented. Therefore, without departing from the general concept defined by the claims and the scope of equivalents, the present invention is not limited to the specific details and the illustrations shown and described herein.

Claims

1. A coding system for filling equipment, comprising: The cap feeding device is characterized in that a coding device (1), an identification device (2) and a sorting device are sequentially arranged on the cap feeding device; A coding device (1) for coding the bag cover transmitted through the conveying system; Identification equipment (2), used for identifying, encoding and spraying the coded bag cover; The sorting equipment is used to sort the bag caps, remove unqualified bag caps, and send qualified bag caps to the capping equipment.

2. The coding system for filling equipment according to claim 1, characterized in that: A defective cap collecting device is provided on the rear side of the sorting equipment.

3. A coding device for a filling device, comprising a cover feeding device and a qualified bag cover transfer device (200), characterized in that: The cap feeding device is connected or docked with the qualified bag cap transfer device (200) via a conveying system. A coding device (1), an identification device (2) and a sorting device are provided in sequence along the bag cap transport direction on at least one side of the conveying system. Signal interaction and control are achieved between the identification device (2) and the sorting device through PLC control processing.

4. The coding device for filling equipment according to claim 3, characterized in that: The conveying system comprises a motor, a conveyor belt (3) and a transfer mechanism, the motor provides power for the conveyor belt (3), the feed end of the conveyor belt (3) is connected to the discharge end of the cover feeding device, the discharge end of the conveyor belt (3) is connected to the feed end of the qualified bag cover transfer device (200), the coding device (1) and the identification device (2) are both located above the conveyor belt (3), the sorting device is located on both sides of the conveyor belt (3) and below the identification device (2), and is used to remove unqualified bag covers from the conveyor belt (3).

5. The coding device for filling equipment according to claim 3, characterized in that: The coding device (1) comprises a coding machine.

6. The coding device for filling equipment according to claim 3, characterized in that: The identification device (2) comprises a camera.

7. The coding device for filling equipment according to claim 3, characterized in that: The sorting device comprises an air blowing device for removing unqualified bag covers from a conveying system and transferring them to an unqualified cover collecting device. The identification device (2) and the air blowing device are controlled and processed by PLC to realize signal interaction and control.

8. The coding device for filling equipment according to claim 7, characterized in that: The blowing device of the sorting equipment comprises an air source, an air pipe, an electromagnetic valve and a blowing nozzle (4), wherein the blowing nozzle (4) is connected to the air source through the air pipe, and the electromagnetic valve is arranged on the air source, or the air pipe, or the blowing nozzle (4). The signal interaction and control between the air source and / or the electromagnetic valve and the identification equipment is realized through PLC control processing.

9. The coding device for filling equipment according to claim 8, characterized in that: The unqualified bag cover collecting device comprises an unqualified bag cover collecting box, which is used for collecting unqualified bag covers rejected from the conveying system.

10. The coding device for filling equipment according to claim 9, characterized in that: The unqualified bag cover collecting device further comprises a collecting channel (5), a feeding end of the collecting channel (5) and the blowing nozzle (4) are respectively located on both sides of the conveying system and are arranged opposite to each other, and a discharging end of the collecting channel (5) is connected to a unqualified bag cover collecting box.

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