A packaging film pattern detection device

Abstract

This utility model relates to the field of packaging bag production technology, and in particular to a packaging film pattern detection device, including a mounting base, a transverse sliding mechanism, and a camera device. The mounting base is transversely fixed to a packaging film unwinding machine, and multiple sets of mounting bases are arranged parallel to each other along the packaging film conveying direction. The transverse sliding mechanism is fixedly mounted on the mounting base and includes a first transverse sliding component and a second transverse sliding component. The first transverse sliding component and the second transverse sliding component are connected by a synchronous belt drive assembly, and both the first transverse sliding component and the second transverse sliding component are slidably connected to a longitudinal sliding mechanism. The camera device is fixed on the longitudinal sliding mechanism, and an LED supplementary light is arranged below the camera device. This utility model uses a synchronous belt drive assembly to synchronously drive the transverse sliding mechanism, causing the two camera devices to move alternately, effectively solving the problem of motion blur caused by high-speed packaging film transmission, thereby improving detection accuracy and efficiency.

Description

Technical Field

[0001] This utility model relates to the field of packaging bag production technology, and in particular to a packaging film pattern detection device. Background Technology

[0002] In the production process of packaging film, a composite film needs to be produced first. A pattern is then printed on the composite film, which is then cut to obtain a packaging film of a certain width to facilitate subsequent bag making. To ensure the accuracy of the printed pattern, it needs to be inspected.

[0003] Traditional inspection methods typically use strobe lights to illuminate the packaging film. During the unwinding process, the strobe light illuminates as the printed pattern passes by, facilitating manual visual inspection to identify and correct defective prints, thus preventing batch issues. However, strobe lights are bright, and frequent flashing can cause eye fatigue, affecting the accuracy of manual visual inspection. Furthermore, strobe lights require frequent flashing, have poor durability, and need replacement after damage. Replacement and maintenance necessitate machine downtime, disrupting normal inspection operations.

[0004] While some existing technologies use visual inspection devices to replace manual inspection, the time required for camera shooting and processing means that excessively fast throughput of the packaging film unwinding machine can cause motion blur in the camera's image, affecting pattern recognition and resulting in significant discrepancies between the inspection results and the actual situation. Utility Model Content

[0005] In order to address the technical deficiencies mentioned in the background, the purpose of this utility model is to provide a packaging film pattern detection device, which aims to solve the problems of large manual detection errors, poor durability of strobe lamps, and motion blur in camera images in existing detection devices.

[0006] To achieve the above objectives, the present invention adopts the following technical solution: A packaging film pattern detection device, comprising The mounting base is horizontally fixed on the packaging film unwinding machine. Multiple sets of the mounting base are provided, and the multiple sets of the mounting base are distributed parallel to each other along the packaging film conveying direction. A lateral sliding mechanism is fixedly mounted on a mounting base. The lateral sliding mechanism includes a first lateral sliding component and a second lateral sliding component. The first lateral sliding component and the second lateral sliding component are connected by a synchronous belt drive component, and a longitudinal sliding mechanism is slidably connected to both the first lateral sliding component and the second lateral sliding component. The longitudinal sliding mechanism includes a first longitudinal sliding component and a second longitudinal sliding component. The first longitudinal sliding component and the second longitudinal sliding component are respectively offset on the first transverse sliding component and the second transverse sliding component, and the first longitudinal sliding component and the second longitudinal sliding component slide in opposite directions along the first transverse sliding component and the second transverse sliding component, respectively. A camera device is used to collect information about the pattern of the packaging film. The camera device is fixedly installed on a longitudinal sliding mechanism, and an LED fill light is provided below the camera device.

[0007] Preferably, the mounting base has an L-shaped structure, and the bottom end of the mounting base is fixed to both sides of the packaging film unwinding machine by screws, while the top end of the mounting base is fixedly connected to the transverse sliding mechanism.

[0008] Preferably, the first lateral movement component and the second lateral movement component have the same structure, both including a bearing slide rail seat, a ball screw, and a sliding seat. The bearing slide rail seat is provided with a bidirectional linear slide rail in parallel. The ball screw is located between the bidirectional linear slide rails, and one end of the ball screw is linked to the synchronous belt drive component. The sliding seat is slidably connected to the bidirectional linear slide rail, and the sliding seat is connected to the ball screw.

[0009] Preferably, the first longitudinal movement component and the second longitudinal movement component have the same structure, both including a guide rail base, a guide block and a connecting plate. The guide rail base is fixedly connected to the sliding base, and a wedge-shaped guide rail strip is provided on the guide rail base. The guide block has a guide groove adapted to the guide rail strip, and the guide block is slidably connected to the guide rail strip. The connecting plate is fixed to the guide block, and one side of the connecting plate is fixedly connected to the camera equipment and the LED fill light respectively.

[0010] Preferably, one side of the guide block is further provided with an adjustment component for adjusting the installation position of the camera equipment and the LED fill light. The adjustment component includes an adjustment handwheel, a connecting shaft, a transmission gear, and a rack. The rack is fitted between two adjacent guide rails and is meshed with the transmission gear. The transmission gear is installed inside the guide block and is sleeved on the connecting shaft. The connecting shaft extends laterally through the outside of the guide block, and one end of the connecting shaft extends out of the guide block and is threadedly connected to the adjustment handwheel.

[0011] Preferably, the synchronous belt drive assembly includes a servo motor, a driving pulley, a driven pulley, and a synchronous belt. The servo motor is mounted at one end of the first transverse assembly, and the output end of the servo motor is connected to the ball screw drive. The driving pulley is mounted at the connection between the servo motor and the ball screw. The driven pulley is mounted on the second transverse assembly, and the synchronous belt is sleeved on the outer surfaces of the driving pulley and the driven pulley.

[0012] Preferably, the LED fill light includes a ring-shaped lamp holder, LED beads, and a ring cover; the LED bead array is evenly distributed along the inner circumference of the ring-shaped lamp holder, and the ring cover is made of transparent material and covers the outside of the LED beads; the ring-shaped lamp holder is coaxially mounted with the lens of the camera device so that the fill light area coincides with the shooting area of ​​the camera device.

[0013] In summary, the beneficial effects of this utility model are as follows: 1. When inspecting patterns on packaging films, this utility model uses a camera device on the packaging film unwinding machine to capture and collect pattern information. This allows the pattern information to be accurately judged by a visual inspection system, thereby eliminating the need for traditional strobe light inspection. This solves the problems of poor durability of strobe lights and the eye fatigue caused by frequent flashing, which affects the accuracy of manual visual inspection, thus improving inspection efficiency and accuracy.

[0014] 2. This utility model effectively solves the problem of motion blur caused by high-speed packaging film transmission by setting up two sets of transverse sliding mechanisms and longitudinal sliding mechanisms, and drives the two camera devices to move alternately by synchronously driving the transverse sliding mechanisms through a synchronous belt drive assembly. It also avoids gaps generated during the retraction of the camera devices, thereby improving the transmission speed of the packaging film and enhancing the detection efficiency and accuracy of the camera devices. Attached Figure Description

[0015] Figure 1 This is a schematic diagram of the overall assembly of the packaging film pattern detection device of this utility model; Figure 2 This is a schematic diagram of the structure of the packaging film pattern detection device of this utility model; Figure 3 This is a schematic diagram of the structure of the single-unit packaging film pattern detection device of this utility model; Figure 4 This is a top view of the packaging film pattern detection device of this utility model; Figure 5 yes Figure 4 A cross-sectional view of the AA plane; Figure 6 yes Figure 4 A cross-sectional view of the BB plane.

[0016] Explanation of the reference numerals in the figure: 1. Packaging film unwinding machine; 2. Mounting base; 3. Lateral sliding mechanism; 31. Bearing slide rail seat; 311. Bidirectional linear slide rail; 32. Ball screw; 33. Sliding seat; 4. Longitudinal sliding mechanism; 41. Guide rail seat; 411. Guide bar; 42. Guide block; 43. Connecting plate; 5. Camera equipment; 6. LED fill light; 61. Circular lamp holder; 62. LED lamp bead; 63. Circular cover; 7. Synchronous belt assembly; 71. Servo motor; 72. Drive pulley; 73. Driven pulley; 74. Synchronous belt; 8. Adjustment assembly; 81. Adjustment handwheel; 82. Connecting shaft; 83. Transmission gear; 84. Rack. Detailed Implementation

[0017] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. All other embodiments obtained by those skilled in the art based on the embodiments of the present utility model are within the protection scope of the present utility model.

[0018] Those skilled in the art should understand that, in the disclosure of this utility model, the terms "longitudinal," "lateral," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," and "outer," etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, the above terms should not be construed as limitations on this utility model.

[0019] In the description of this utility model, the use of terms such as "several" means one or more, with "multiple" meaning two or more. Terms like "greater than," "less than," and "exceeding" are understood to exclude the stated number, while "above," "below," and "within" are understood to include the stated number. The use of terms like "first," "second," and "third" is merely for distinguishing technical features and should not be construed as indicating or implying relative importance, the quantity of indicated technical features, or the sequential relationship between indicated technical features.

[0020] The following is in conjunction with the appendix Figure 1-6 The embodiments of the packaging film pattern detection device of this utility model will be described in further detail.

[0021] A packaging film pattern detection device, such as Figure 1As shown, the device includes a mounting base 2, a transverse sliding mechanism 3, and a camera device 5. The mounting base 2 is transversely fixed on the packaging film unwinding machine 1, and multiple sets of mounting bases 2 are provided, which are distributed parallel to each other along the packaging film conveying direction. The transverse sliding mechanism 3 is fixedly mounted on the mounting base and includes a first transverse sliding component and a second transverse sliding component. The first transverse sliding component and the second transverse sliding component are connected by a synchronous belt drive component 7, and a longitudinal sliding mechanism 4 is slidably connected to both the first transverse sliding component and the second transverse sliding component. The camera device 5 is used to collect packaging film pattern information. The camera device 5 is fixedly mounted on the longitudinal sliding mechanism 4, and an LED supplementary light 6 is provided below the camera device 5.

[0022] Specifically, the longitudinal sliding mechanism 4 includes a first longitudinal sliding component and a second longitudinal sliding component. The first and second longitudinal sliding components are respectively offset from the first and second transverse sliding components, and slide in opposite directions along the first and second transverse sliding components, respectively. When the packaging film is released by the unwinding machine and transported at a uniform speed, the transverse sliding mechanism 3 drives two camera devices 5 to move alternately along the packaging film conveying direction, so that the moving speed of the camera devices 5 is precisely matched with the conveying speed of the packaging film, completely avoiding shooting ghosting. At the same time, the LED supplementary light 6 is turned on synchronously to provide uniform supplementary light. The camera devices 5 collect the packaging film pattern information in real time and transmit the image to the visual inspection system. The visual inspection system has a built-in pattern defect recognition algorithm to automatically identify defects such as missing prints and color misregistration. This visual inspection system is common knowledge. Its specific detection algorithm and principle can be referred to in the existing visual inspection system, so it will not be described in detail in this embodiment.

[0023] It should be noted that, as Figure 5 As shown, the camera device 5 in this embodiment is preferably an industrial CCD camera, model Sony XCG-5005E. The industrial CCD camera, combined with a short exposure time, reduces the relative displacement of the packaging film during exposure. At the same time, the LED fill light provides short-duration strong pulse light to compensate for insufficient light under short exposure, avoiding the problem of overly dark images. The camera device 5 is fixed on the longitudinal sliding mechanism 4 by a bracket, and the lens of the camera device 5 is perpendicular to the surface of the packaging film for acquiring pattern information. The LED fill light 6 has a ring structure, including a ring lamp holder 61, an LED bead array, and a transparent ring cover 63. The LED beads 62 are evenly arranged along the inner circumference of the ring lamp holder 61 to provide a uniform surface light source. The transparent ring cover 63 is made of PC or acrylic and is placed on the outside of the LED beads, serving both light-focusing and protective functions. The ring lamp holder 61 is coaxially mounted with the lens of the camera device 5 to ensure that the fill light area and the shooting area are completely overlapped, improving the clarity of the pattern image.

[0024] In this embodiment, as Figure 2As shown, the mounting base 2 has an L-shaped structure, and the bottom end of the mounting base 2 is fixed to both sides of the packaging film unwinding machine by screws. The top end of the mounting base 2 is fixedly connected to the transverse sliding mechanism 3.

[0025] Specifically, the mounting base 2 is used to fix the detection device as a whole onto the packaging film unwinding machine 1. The mounting base 2 has an L-shaped structure, consisting of a horizontally arranged horizontal plate and an axially arranged vertical plate. The horizontal plate is firmly fixed to the two side frames of the packaging film unwinding machine 1 with screws, providing a horizontal mounting reference for the device. The vertical plate is vertically fixed to the horizontal plate, and one end of the vertical plate is rigidly connected to the subsequent first and second transverse moving components by bolts, serving as longitudinal support and positioning. Each of the first and second transverse moving components is equipped with two sets of mounting bases 2 to ensure the installation stability and operational synchronization of the transverse sliding mechanism 3.

[0026] In this embodiment, as Figure 3 As shown, the transverse sliding mechanism 3 is fixed on the mounting base 2 and is responsible for driving the camera device 5 to move synchronously along the packaging film conveying direction. It includes a first transverse sliding component, a second transverse sliding component, and a synchronous belt drive component 7. The first transverse sliding component and the second transverse sliding component have the same structure, both including a bearing slide rail seat 31, a ball screw 32, and a sliding seat 33. A bidirectional linear slide rail 311 is arranged parallel to the bearing slide rail seat 31. The ball screw 32 is located between the bidirectional linear slide rails 311, and one end of the ball screw 32 is linked to the synchronous belt drive component 7. The sliding seat 33 is slidably connected to the bidirectional linear slide rail 311, and the sliding seat 33 is connected to the ball screw 32.

[0027] Specifically, the parallel bidirectional linear guides 311 on the bearing slide rail seat 31 provide low-friction, high-precision linear guidance for the sliding seat 33; the ball screw 32 is parallel to the bidirectional linear guides 311, and one end of it is linked to the synchronous belt drive assembly 7 through a coupling or synchronous pulley; the sliding seat 33 is slidably connected to the bidirectional linear guides 311 through a slider, and the built-in screw nut cooperates with the ball screw 32. When the ball screw 32 rotates, the sliding seat 33 can move smoothly in a straight line along the guide rail; when the synchronous belt drive assembly is activated... At 7 o'clock, on the one hand, it directly drives the ball screw 32 of the first transverse component to rotate, so that the sliding seat 33 of the first transverse component slides along the bidirectional linear slide rail 311; on the other hand, it can also drive the ball screw 32 of the second transverse component to rotate synchronously, so that the sliding seat 33 of the second transverse component moves synchronously in the opposite direction to the sliding seat 33 of the first transverse component, so as to ensure that the two camera devices 5 alternately cover the detection area, thereby avoiding the problem of gaps during the process of the camera device 5 moving back, and thus improving the detection efficiency of the packaging film pattern.

[0028] Among them, such as Figure 2 and Figure 4As shown, the synchronous belt drive assembly 7 consists of a servo motor 71, a drive pulley 72, a driven pulley 73, and a synchronous belt 74. The servo motor 71 is installed at one end of the first transverse assembly, and its output shaft is connected to the ball screw 32 of the first transverse assembly via a coupling. The drive pulley 72 is coaxially installed at the connection between the servo motor 71 and the ball screw 32. The driven pulley 73 is correspondingly installed at the end of the ball screw 32 of the second transverse assembly. The synchronous belt 74 is sleeved on and meshes with the outside of the drive and driven pulleys 73 to realize the synchronous transmission of the two transverse assemblies.

[0029] In this embodiment, as Figure 5 As shown, the longitudinal sliding mechanism 4 is used to adjust the height of the camera device 5, and includes a first longitudinal sliding component, a second longitudinal sliding component, and an adjustment component 8. The longitudinal sliding mechanism 4 adopts the guide rail sliding method commonly used in the prior art, which enables the camera device 5 to adjust the installation height according to the thickness and reflective characteristics of the packaging film.

[0030] Specifically, the first longitudinal movement assembly and the second longitudinal movement assembly have the same structure, both including a guide rail base 41, a guide block 42, and a connecting plate 43. The guide rail base 41 is fixed to the sliding seat 33 of the transverse sliding mechanism 3 by bolts, and a wedge-shaped guide rail is machined on it. The guide block 42 has a wedge-shaped guide groove adapted to the guide rail, which can slide stably along the guide rail. The connecting plate 43 is an L-shaped plate, and one side of the connecting plate 43 is welded or bolted to the guide block 42, while the other side is used to fix the camera equipment 5 and the LED fill light 6.

[0031] It should be noted that, in order to keep the moving speed of the lateral sliding mechanism 3 the same as the conveying speed of the packaging film unwinding machine 1, a speed sensor can be installed on the packaging film unwinding machine 1. The speed sensor detects the unwinding speed of the packaging film unwinding machine 1 in real time and sends the signal to the external control system. The external control system controls the rotation speed of the servo motor 71 according to the received signal, thereby controlling the moving speed of the lateral sliding mechanism 3, so that the movement of the camera device 5 is the same as the conveying speed of the packaging film. At the same time, in order to control the sliding stroke of the lateral sliding mechanism 3, limit switches are set at both ends of the first and second lateral sliding components. The limit switches are used to control the maximum sliding stroke of the first and second lateral sliding components. According to the trigger signal of the limit switches, the external control system controls the first and second lateral sliding components to perform alternating reciprocating linear motion between the limit switches at both ends, so as to ensure that the two camera devices 5 cover the packaging film detection area without gaps, and keep the camera devices 5 and the packaging film relatively stationary, and that the packaging film has no relative displacement during the exposure time, thereby completely eliminating the ghosting problem and effectively improving the detection accuracy.

[0032] In this embodiment, as Figure 6As shown, the adjustment component 8 is used to fine-tune the longitudinal position of the camera device 5, including an adjustment handwheel 81, a connecting shaft 82, a transmission gear 83, and a rack 84. The rack 84 is fitted between adjacent guide rails of the guide rail seat 41 and meshes with the transmission gear 83. The transmission gear 83 is installed inside the guide block 42 through a bearing and is fitted onto the connecting shaft 82. The connecting shaft 82 passes laterally through the guide block 42, and its exposed end is threadedly connected to the adjustment handwheel 81.

[0033] Specifically, the thickness or reflectivity of the packaging film significantly affects the image clarity. For example, thick films require a larger object distance to avoid unclear focus, while thin films require a smaller object distance to improve resolution. Simultaneously, PET reflective films need to be lowered to reduce specular reflection. The camera device 5 is precisely positioned to the optimal shooting height using the adjustment component 8. When the object distance of the camera device 5 needs adjustment, the handwheel 81 is manually rotated, causing the connecting shaft 82 to drive the transmission gear 83 to rotate. Through the meshing of the gear and rack, the guide block 42 slides along the guide rail, achieving fine-tuning of the camera device 5's height. This ensures the lens maintains the optimal object distance to the surface of the new-specification packaging film, guaranteeing image clarity. Once the height is adjusted, a limit rod is installed in the axial direction of the transmission gear 83 to prevent rotation of the connecting shaft 82 and the transmission gear 83. This prevents the camera device 5 from shifting due to vibration during the inspection process, ensuring shooting stability.

[0034] The working principle of this packaging film pattern detection device: When the packaging film is released from the unwinding machine and transported at a constant speed, the lateral sliding mechanism 3 directly drives the ball screw 32 of the first lateral sliding component to rotate, causing the sliding seat 33 of the first lateral sliding component to slide along the bidirectional linear slide rail 311. Simultaneously, the servo motor 71 drives the driven pulley 73 to rotate via the active pulley 72 and the synchronous belt 74, thereby synchronously driving the ball screw 32 of the second lateral sliding component to rotate. This causes the first and second longitudinal sliding components, each carrying two camera devices 5, to move alternately along the packaging film transport direction. When the packaging film is transported at a constant speed v, the control system adjusts the speed of the servo motor 71 according to the speed sensor signal, ensuring that the lateral speed of the camera device 5 precisely matches the speed v of the packaging film. At this time, the camera device 5 and the packaging film are relatively stationary, and there is no relative displacement of the packaging film during the exposure time, completely eliminating the ghosting problem and improving detection accuracy.

[0035] The embodiments described in this specific implementation are preferred embodiments of this application and are not intended to limit the scope of protection of this application. Identical components are represented by the same reference numerals. Therefore, all equivalent changes made to the structure, shape, and principle of this application should be covered within the scope of protection of this application.

Claims

1. A packaging film pattern detection device, characterized in that, include The mounting base is horizontally fixed on the packaging film unwinding machine. Multiple sets of the mounting base are provided, and the multiple sets of the mounting base are distributed parallel to each other along the packaging film conveying direction. A lateral sliding mechanism is fixedly mounted on a mounting base. The lateral sliding mechanism includes a first lateral sliding component and a second lateral sliding component. The first lateral sliding component and the second lateral sliding component are connected by a synchronous belt drive component, and a longitudinal sliding mechanism is slidably connected to both the first lateral sliding component and the second lateral sliding component. The longitudinal sliding mechanism includes a first longitudinal sliding component and a second longitudinal sliding component. The first longitudinal sliding component and the second longitudinal sliding component are respectively offset on the first transverse sliding component and the second transverse sliding component, and the first longitudinal sliding component and the second longitudinal sliding component slide in opposite directions along the first transverse sliding component and the second transverse sliding component, respectively. A camera device is used to collect information about the pattern of the packaging film. The camera device is fixedly installed on a longitudinal sliding mechanism, and an LED fill light is provided below the camera device.

2. The packaging film pattern detection device according to claim 1, characterized in that, The mounting base has an L-shaped structure, and the bottom end of the mounting base is fixed to both sides of the packaging film unwinding machine by screws. The top end of the mounting base is fixedly connected to the transverse sliding mechanism.

3. The packaging film pattern detection device according to claim 2, characterized in that, The first and second transverse components have the same structure, both including a bearing slide rail seat, a ball screw, and a sliding seat. The bearing slide rail seat has a bidirectional linear slide rail arranged in parallel. The ball screw is located between the bidirectional linear slide rails, and one end of the ball screw is linked to the synchronous belt drive component. The sliding seat is slidably connected to the bidirectional linear slide rails, and the sliding seat is connected to the ball screw.

4. The packaging film pattern detection device according to claim 3, characterized in that, The first longitudinal movement component and the second longitudinal movement component have the same structure, both including a guide rail base, a guide block and a connecting plate. The guide rail base is fixedly connected to the sliding base, and a wedge-shaped guide rail strip is provided on the guide rail base. The guide block has a guide groove adapted to the guide rail strip, and the guide block is slidably connected to the guide rail strip. The connecting plate is fixed to the guide block, and one side of the connecting plate is fixedly connected to the camera equipment and the LED fill light respectively.

5. The packaging film pattern detection device according to claim 4, characterized in that, One side of the guide block is also provided with an adjustment component for adjusting the installation position of the camera equipment and LED fill light. The adjustment component includes an adjustment handwheel, a connecting shaft, a transmission gear, and a rack. The rack is fitted between two adjacent guide rails and is meshed with the transmission gear. The transmission gear is installed inside the guide block and is sleeved on the connecting shaft. The connecting shaft extends laterally through the outside of the guide block, and one end of the connecting shaft extends out of the guide block and is threadedly connected to the adjustment handwheel.

6. The packaging film pattern detection device according to claim 1, characterized in that, The synchronous belt drive assembly includes a servo motor, a driving pulley, a driven pulley, and a synchronous belt. The servo motor is installed at one end of the first transverse assembly, and the output end of the servo motor is connected to the ball screw drive. The driving pulley is installed at the connection between the servo motor and the ball screw. The driven pulley is installed on the second transverse assembly, and the synchronous belt is sleeved on the outer surfaces of the driving pulley and the driven pulley.

7. The packaging film pattern detection device according to claim 1, characterized in that, The LED fill light includes a ring-shaped lamp holder, LED beads, and a ring-shaped cover; the LED bead array is evenly distributed along the inner circumference of the ring-shaped lamp holder, and the ring-shaped cover is made of transparent material and covers the outside of the LED beads; the ring-shaped lamp holder is coaxially mounted with the lens of the camera device so that the fill light area coincides with the shooting area of ​​the camera device.

Images