Film feeding and color code adjusting mechanism of strip packaging machine

Abstract

A film feeding and color code adjusting mechanism of a strip packaging machine comprises a film feeding roller, a traction roller, a buffer assembly and a color code detection adjusting assembly, the film feeding roller is connected with a film feeding driving motor, the traction roller is connected with a film drawing driving motor, and the buffer assembly comprises a swing rod, a swing motor and a buffer roller. The color code detecting and adjusting assembly comprises an adjusting base, a color code electric eye and an adjusting component, the color code electric eye is fixed to the adjusting base and used for detecting a color code on a packaging film, and the adjusting component comprises an adjusting motor, a guide rod, a screw and a driving nut. The adjusting motor drives the adjusting seat to move in the length direction of the packaging film through the screw rod and the driving nut; the device further comprises at least one tensioning assembly. According to the utility model, the phenomena that the tension is unstable and the packaging film is tight and loose in the film feeding process can be reduced, the accuracy of the length of the strip package is improved, the packaging film is not wasted, and the device can adapt to the production of the strip packages with different length specifications.

Description

Technical Field

[0001] The utility model relates to the technical field of packaging equipment, in particular to a film feeding and color mark adjusting mechanism of a strip wrapping machine. Background Art

[0002] Stick wrapping machines are primarily used for packaging granular, powder, and liquid materials. Their key processes include conveying the packaging film, guiding the strips into shape, sealing the longitudinal and transverse edges of the strips, filling the material, splitting the strips, cutting the easy-tear edges, and removing defective products. The packaging film is transported by conveyor rollers, which are typically equipped with a drive motor. This motor powers the conveyor mechanism. As a roll of film nears completion, the film loses tension and slips on the rollers, preventing the final portion of the roll from being delivered, leading to inefficient film utilization and waste. Furthermore, stick wrapping machines are required to produce different types of strips with varying lengths and widths, requiring highly adaptable equipment that can be adjusted to suit the strip type. Furthermore, to improve the quality of the strips, precise control of the strip length is essential. To achieve this, the tension of the film must be controlled to ensure a consistent tension and, therefore, a consistent strip length. Utility Model Content

[0003] The purpose of the utility model is to overcome the shortcomings of the above-mentioned prior art and provide a strip bag machine film feeding and color mark adjustment mechanism that can improve the accuracy of strip bag length and adapt to the production of strip bags of different lengths.

[0004] The utility model is realized through the following technical solutions:

[0005] The film feeding roller is connected with the film feeding drive motor, the film feeding roller, the buffer assembly and the mark detection and adjustment assembly are arranged on the feeding path of the packaging film, the film feeding roller is connected with the film pulling drive motor, and the film feeding roller and the traction roller cooperate with each other to make the packaging film on the film feeding roller completely used up, that is, the film feeding roller and the traction roller one for feeding the film and the other for pulling the film, and cooperate with each other to feed the film more smoothly. When the packaging film on the film feeding roller is about to be exhausted and loses tension, the traction roller can pull the packaging film that has lost tension until the packaging film is exhausted, and its tail end is connected with the next roll of packaging film, so that the packaging film can be completely used up and no packaging film is wasted; the buffer assembly comprises a swing arm, a swing motor and a buffer roller, and the swing arm can be swingably mounted on the machine The cam is mounted on a frame, wherein the cam is connected to one end of the cam to drive the cam to swing, and the other end of the cam is provided with at least one buffer roller, that is, the rotating shaft of the buffer roller can be rotatably installed on the other end of the cam, and the packaging film passes through the buffer roller, and the cam adjusts the tension of the packaging film by controlling the swing of the cam. The cam controls the swing angle of the cam through the encoder, thereby controlling the swing amplitude of the cam to avoid the speed difference between the film feeding drive motor and the film pulling drive motor causing the tension of the packaging film to be large or small, and the packaging film to be loose or tight, resulting in different lengths of the final strips; the color mark detection and adjustment component includes an adjustment seat, a color mark electric eye and an adjustment component, the color mark electric eye is fixed on the adjustment seat, and is used to detect the color mark on the packaging film, and the adjustment component is connected to the adjustment seat to drive the adjustment seat to move along the length direction (conveying direction) of the packaging film to adjust the relative position of the color mark electric eye and the packaging film.

[0006] Furthermore, the adjusting component includes an adjusting motor, a guide rod, a screw and a driving nut. The guide rod and the screw are arranged on the frame parallel to each other along the length direction of the packaging film, that is, the guide rod and the screw are parallel to the length direction of the packaging film. The adjusting motor is driven and connected to the screw, the driving nut is screwed on the screw, and the adjusting seat is fixedly connected to the driving nut. The adjusting motor drives the adjusting seat to move along the guide rod (in the length direction of the packaging film) through the screw and the driving nut.

[0007] Furthermore, a film pressing plate is provided above the color mark electric eye, and the film pressing plate is used to flatten the edge of the packaging film to facilitate the color mark electric eye to detect the color mark at the edge of the film, thereby avoiding the influence of the winding of the packaging film on the color mark detection. The film pressing plate is fixed on the adjustment seat; the guide rod is provided with a length scale for easy adjustment.

[0008] Furthermore, the adjustment seat includes an adjustment plate extending along the width direction of the packaging film, and the adjustment plate is provided with an elongated slot extending along the width direction of the packaging film. The color code electric eye is installed on the mounting plate, and the mounting plate is movably mounted on the adjustment plate through the elongated slot, so that the color code electric eye can be adjusted along the width direction of the packaging film to adapt to different width specifications of the packaging film.

[0009] Furthermore, the color mark detection and adjustment component is provided with a pressing component at the front end and the rear end along the packaging film conveying direction, and the two groups of the pressing components are used to cooperate with each other to stretch and flatten the packaging film, so as to facilitate the color mark detection and adjustment component to accurately detect the color mark on the packaging film. Each group of the pressing components includes a pressing roller, a flattening roller and an elastic member. The pressing roller is arranged above the flattening roller through the elastic member and pressed on the flattening roller. The packaging film is respectively wrapped around the pressing roller and the flattening roller, and the color mark detection and adjustment component is located between the two flattening rollers on the two groups of pressing assemblies, and the elastic member is respectively connected to the two ends of the pressing roller to control the pressing force between the pressing roller and the flattening roller, so that the packaging film between the two flattening rollers is appropriately tight, not too tight to stretch the packaging film, and not too loose, to ensure the accuracy of the strip length, and the elastic member includes a spring.

[0010] Furthermore, the rocker arm includes an integrated main arm and a support arm, the rocking motor is connected to one end of the main arm to drive the main arm to swing, and at least one support arm is provided on the other end of the main arm, and a buffer roller is installed at the end of each support arm.

[0011] Furthermore, the two swing rods are provided with two opposite left and right sides, the swing motor is connected to a transmission shaft, one end of the two swing rods is respectively connected to the two ends of the transmission shaft, and the two ends of the buffer roller are respectively installed on the other end of the two swing rods.

[0012] Furthermore, it also includes at least one group of tensioning components, each group of the tensioning components includes a tensioning roller and two groups of tensioning adjustment structures, the two groups of tensioning adjustment structures are arranged opposite to each other on the left and right, and each group of the tensioning adjustment structure includes a handwheel and a screw nut pair, the handwheel is driven and connected to the screw in the screw nut pair, and the two ends of the tensioning roller are respectively connected to the drive nuts in the two groups of screw nut pairs.

[0013] Furthermore, a film splicing platform is provided on the conveying path of the packaging film. The film splicing platform is provided with guide rollers at both ends along the conveying direction of the packaging film. The packaging film passes around the film splicing platform through the guide rollers. The film splicing platform is used to connect the front and rear rolls of packaging film.

[0014] Furthermore, a film detection electric eye is provided on the conveying path of the packaging film near the film feeding roller, for detecting whether the packaging film on the film feeding roller is used up.

[0015] The utility model provides two sets of drives in the film feeding part, one set is used for film feeding and the other set is used for film pulling, so that film feeding is smoother, and the buffer component reduces the unstable tensioning force that may occur in the film feeding process, and the phenomenon of the packaging film being tight and loose, avoids the difficulty in controlling the length of the strip package, improves the accuracy of the strip package length, and also avoids slipping of the packaging film during transportation; the setting of the film pulling drive allows the packaging film on the film feeding roller to be completely used up, and a film splicing platform is provided, which can be smoothly spliced with the next film roll without wasting packaging film; the color mark detection and adjustment component can adjust the position of the color mark electric eye along the length direction of the packaging film, so as to adapt to the production of strip packages of different length specifications, the color mark detection and adjustment component is provided with a film pressing plate, and pressing components are provided at the front and rear ends of the color mark detection and adjustment component, so that the packaging film can be flattened and not curled during color mark detection, further improving the accuracy of color mark detection, improving the accuracy of strip package length control, and improving product quality. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 It is a structural schematic diagram of an embodiment of the present utility model.

[0017] Figure 2 It is a front view of an embodiment of the present utility model.

[0018] Figure 3 for Figure 2 Cross-sectional view in the AA direction.

[0019] Figure 4 It is a cross-sectional view of the buffer assembly and the tensioning assembly in the embodiment of the present utility model.

[0020] Figure 5 It is a structural schematic diagram of the clamping assembly in an embodiment of the present utility model.

[0021] Figure 6 Schematic diagram of the structure of the color mark detection and adjustment component in the embodiment of the present utility model.

[0022] Figure 7 Schematic top view of the color mark detection and adjustment component in the embodiment of the present utility model.

[0023] Figure 8 It is a cross-sectional view of the color mark detection and adjustment component in the embodiment of the present utility model.

[0024] Figure 9 This is a top view of the installation of the color mark detection and adjustment component in the embodiment of the present utility model.

[0025] Figure 10 Schematic diagram of the installation of the color mark detection and adjustment component in the embodiment of the present utility model.

[0026] Figure 11This is a front view of the color mark detection and adjustment component in an embodiment of the present utility model.

[0027] Figure markings: 1-frame; 2-film feeding roller; 3-film splicing platform; 4-traction roller; 5-buffer assembly; 6-color mark detection and adjustment assembly; 7-pressing assembly; 8-tensioning assembly; 9-film detection electric eye; 10-packaging film; 101-color mark; 31-guide roller; 51-rocker; 52-buffer roller; 511-main rod; 512-support rod; 61-adjustment seat; 62-color mark electric eye; 63-film pressing plate; 64-adjustment motor; 65-screw; 66-drive nut; 67-guide rod; 68-mounting plate; 611-adjustment plate; 612-elongated slot; 671-length scale; 681-fixed block; 71-pressing roller; 72-flattening roller; 73-elastic member; 81-handwheel; 82-screw nut pair; 83-tensioning roller. DETAILED DESCRIPTION

[0028] A film feeding and color mark adjustment mechanism for a strip wrapping machine, such as Figures 1 to 3 The film feed roller 2 is connected to a film feed drive motor, and the traction roller 4, the buffer assembly 5 and the color mark detection and adjustment assembly are arranged on the conveying path of the packaging film 10. The traction roller 4 is connected to a film pulling drive motor for pulling the packaging film 10. The film feed roller 2 and the traction roller 4 cooperate with each other to make the packaging film 10 on the film feed roller 2 completely used up, that is, the film feed roller 2 and the traction roller 4 feed the film and pull the film respectively, and cooperate with each other to smoothly feed the film. When the packaging film 10 on the film feed roller 2 is about to be used up and loses the tension, the traction roller 4 can pull the packaging film 10 that has lost the tension until the packaging film 10 is used up, and the tail end of the previous roll of packaging film 10 can be connected with the front end of the next roll of packaging film 10, so that the packaging film 10 can be completely used up and the packaging film 10 is not wasted.

[0029] like Figure 3 、 Figure 4The buffer assembly 5 includes a rocker arm 51, a rocking motor and a buffer roller 52. The rocker arm 51 is swingably mounted on the frame 1. The rocking motor is driven and connected to one end of the rocker arm 51 to drive the rocker arm 51 to swing. At least one buffer roller 52 is mounted on the other end of the rocker arm 51, that is, the rotating shaft of the buffer roller 52 is rotatably mounted on the other end of the rocker arm 51. The packaging film 10 passes around the buffer roller 52. The rocking motor adjusts the tension of the packaging film 10 by controlling the swing of the rocker arm 51. The rocking motor controls its rotation angle through an encoder, thereby controlling the swing amplitude of the rocker arm 51 and adjusting the position of the buffer roller 52 to avoid the speed difference between the film feeding drive motor and the film pulling drive motor, which causes the tension of the packaging film 10 to be large or small, and the packaging film 10 to be loose or tight, resulting in the final length of the strip package being different, affecting product quality.

[0030] like Figures 6 to 11 The color mark detection and adjustment component 6 includes an adjustment seat 61, a color mark electric eye 62 and an adjustment member. The color mark electric eye 62 is fixed on the adjustment seat 61 and is used to detect the color mark 101 on the packaging film 10, and transmit the detection signal to the subsequent longitudinal sealing module, transverse sealing module and punching module to control the operation of these modules, thereby controlling the length of the strip package. The adjustment member is connected to the adjustment seat 61 to drive the adjustment seat 61 to move along the length direction (conveying direction) of the packaging film 10, and adjust the relative position of the color mark electric eye 62 and the packaging film 10 to adapt to the production of strip packages of different length specifications.

[0031] The function of the adjusting member is to adjust the position of the adjusting seat 61, and it can be an existing mechanism and form, such as a cylinder-driven structure. As one embodiment, the adjusting member includes an adjusting motor 64, a guide rod 67, a screw 65 and a drive nut 66. The guide rod 67 and the screw 65 are arranged on the frame 1 in parallel with each other along the length direction of the packaging film 10, that is, the guide rod 67 and the screw 65 are parallel to the length direction of the packaging film 10. The adjusting motor 64 is driven and connected to the screw 65, and the drive nut 66 is screwed onto the screw 65. The adjusting seat 61 is fixedly connected to the drive nut 66. The adjusting motor 64 drives the adjusting seat 61 to move along the guide rod 67 (the length direction of the packaging film 10) through the screw 65 and the drive nut 66. The driving motor can also be replaced with a handle or handwheel 81 to manually drive the screw 65 to rotate. For easy adjustment, the guide rod 67 is also provided with a length scale 671.

[0032] In this embodiment, a film pressing plate 63 is provided above the color mark electric eye 62. The film pressing plate 63 is used to flatten the edge of the packaging film 10 to facilitate the color mark electric eye 62 to detect the color mark 101 at the edge of the film, thereby avoiding the influence of the winding of the packaging film 10 on the color mark detection. The film pressing plate 63 is fixed on the adjustment seat 61.

[0033] like Figure 6 The adjustment base 61 includes an adjustment plate 611 extending along the width of the packaging film 10. The adjustment plate 611 is provided with an elongated slot 612 extending along the width of the packaging film 10. The color-coded electric eye 62 is mounted on a mounting plate 68. The mounting plate 68 is movably mounted on the adjustment plate 611 via the elongated slot 612, allowing the color-coded electric eye 62 to be adjusted along the width of the packaging film 10 to accommodate different width specifications of the packaging film 10. Specifically, a fixing block 681 is provided on the mounting plate 68. The fixing block 681 passes through the elongated slot 612 and is fixed to the adjustment plate 611 by bolts. The fixing block 681 can be moved along the elongated slot 612 to adjust its installation position.

[0034] In this embodiment, Figure 3 、 Figure 5 The color mark detection and adjustment component 6 is provided with a pressing component 7 at the front and rear ends of the packaging film 10 in the conveying direction. The two groups of pressing components 7 are used to cooperate with each other to stretch and flatten the packaging film 10, so as to facilitate the color mark detection and adjustment component 6 to accurately detect the color mark 101 on the packaging film 10. Each group of pressing components 7 includes a pressing roller 71, a flattening roller 72 and an elastic member 73. The pressing roller 71 is arranged above the flattening roller 72 through the elastic member 73 and pressed on the flattening roller 72. The packaging film 10 is respectively wrapped around the pressing roller 71 and the flattening roller 72, and the color mark detection and adjustment component 6 is located between the two flattening rollers 72 on the two groups of pressing components 7. The elastic member 73 is respectively connected to the two ends of the pressing roller 71 to control the pressing force between the pressing roller 71 and the flattening roller 72, so that the packaging film 10 between the two flattening rollers 72 is appropriately tight, not too tight to stretch the packaging film 10, and not too loose, thereby ensuring the accuracy of the strip length. The elastic member 73 includes a spring in its structure, and the spring is used for buffering.

[0035] The structure and form of the swing lever 51 can be designed according to actual conditions. As one embodiment, the swing lever 51 includes an integrated main lever 511 and a support lever 512. The swing motor is drivingly connected to one end of the main lever 511 to drive the main lever 511 to swing. The other end of the main lever 511 is provided with at least one support lever 512, and each support lever 512 is mounted on the end of a buffer roller 52. The swing lever 51 is provided with two opposing left and right swing levers. The swing motor is connected to a transmission shaft. One end of the two swing levers 51 is connected to the two ends of the transmission shaft, and the two ends of the buffer roller 52 are mounted on the other ends of the two swing levers 51.

[0036] The present invention also includes at least one set of tensioning components 8, such as Figure 1 、 Figure 3 、 Figure 4This embodiment is provided with two sets, upper and lower. Each set of tensioning assemblies 8 includes a tensioning roller 83 and two sets of tensioning adjustment structures. The two sets of tensioning adjustment structures are arranged opposite each other on the left and right. Each set of tensioning adjustment structures includes a handwheel 81 and a screw-nut pair 82. The handwheel 81 is drivingly connected to the screw in the screw-nut pair 82. The ends of the tensioning roller 83 are respectively connected to the drive nuts 66 in the two sets of screw-nut pairs 82. The handwheel 81 drives the nut 66 along the screw, driving the tensioning roller 83 to control the tensioning force. This is generally used for equipment debugging before startup. The buffer assembly 5 is used for real-time adjustment during equipment operation, and is autonomously performed by the swing motor based on the operating conditions.

[0037] like Figure 1 、 Figure 3 A film splicing platform 3 and a film detection sensor 9 are also provided along the conveying path of the packaging film 10. The film splicing platform 3 is provided with guide rollers 31 at both the front and rear ends along the conveying direction of the packaging film. The packaging film 10 passes over the film splicing platform 3 via the guide rollers 31, where the front and rear rolls of packaging film 10 are automatically or manually joined end to end on the film splicing platform 3. In this embodiment, the film splicing platform 3 is positioned below and near the film feed roller 2. The film detection sensor 9 is also positioned near the film feed roller 2 to detect whether the packaging film 10 on the film feed roller 2 is exhausted.

[0038] The above detailed description is a specific description of a feasible embodiment of the present invention. The embodiment is not intended to limit the patent scope of the present invention. Any equivalent implementation or modification that does not depart from the present invention should be included in the patent scope of this case.

Claims

1. A film feeding and color code adjustment mechanism for a strip wrapping machine, characterized in that: The film feeding device comprises a frame and a film feeding roller, a traction roller, a buffer assembly and a color mark detection and adjustment assembly arranged on the frame, wherein the film feeding roller is used to feed the packaging film, the film feeding roller is connected to a film feeding drive motor, the traction roller, the buffer assembly and the color mark detection and adjustment assembly are arranged on the feeding path of the packaging film, the traction roller is connected to a film pulling drive motor for pulling the packaging film, and the film feeding roller and the traction roller cooperate with each other to completely use up the packaging film on the film feeding roller; the buffer assembly comprises a swing rod, a swing motor and a buffer roller, the swing rod is swingably mounted on the frame, the swing motor is drivingly connected to one end of the swing rod to drive the swing rod to swing, and at least one buffer roller is mounted on the other end of the swing rod, the packaging film passes around the buffer roller, and the swing motor adjusts the tension of the packaging film by controlling the swing of the swing rod; the color mark detection and adjustment assembly comprises an adjustment seat, a color mark electric eye and an adjustment member, the color mark electric eye is fixed on the adjustment seat and is used to detect the color mark on the packaging film, and the adjustment member is connected to the adjustment seat to drive the adjustment seat to move along the length direction of the packaging film to adjust the relative position of the color mark electric eye and the packaging film.

2. The film feeding and color mark adjustment mechanism of the strip wrapping machine according to claim 1, characterized in that: The adjusting component includes an adjusting motor, a guide rod, a screw and a driving nut. The guide rod and the screw are arranged on the frame in parallel with each other along the length direction of the packaging film. The adjusting motor is drivingly connected to the screw, the driving nut is screwed onto the screw, and the adjusting seat is fixedly connected to the driving nut. The adjusting motor drives the adjusting seat to move along the guide rod through the screw and the driving nut.

3. The film feeding and color mark adjustment mechanism of the strip wrapping machine according to claim 2, characterized in that: A film pressing plate is provided above the color mark electric eye, and is used to flatten the edge of the packaging film to facilitate the color mark electric eye to detect the color mark at the edge of the film. The film pressing plate is fixed on the adjustment seat; a length scale is provided on the guide rod for easy adjustment.

4. The film feeding and color mark adjustment mechanism of a strip wrapping machine according to claim 1, characterized in that: The adjustment seat includes an adjustment plate extending along the width direction of the packaging film, and an elongated slot extending along the width direction of the packaging film is provided on the adjustment plate. The color standard electric eye is mounted on the mounting plate, and the mounting plate is movably mounted on the adjustment plate through the elongated slot, so that the color standard electric eye can be adjusted along the width direction of the packaging film.

5. The film feeding and color mark adjustment mechanism of the strip wrapping machine according to claim 1, characterized in that: The color mark detection and adjustment component is provided with a pressing component at the front end and the rear end along the packaging film conveying direction. The two groups of pressing components are used to cooperate with each other to stretch and flatten the packaging film, so as to facilitate the color mark detection and adjustment component to accurately detect the color mark on the packaging film. Each group of pressing components includes a pressing roller, a flattening roller and an elastic member. The pressing roller is arranged above the flattening roller through the elastic member and pressed on the flattening roller. The packaging film is respectively wrapped around the pressing roller and the flattening roller, and the color mark detection and adjustment component is located between the two flattening rollers on the two groups of pressing assemblies. The elastic members are respectively connected to the two ends of the pressing roller to control the pressing force between the pressing roller and the flattening roller, so that the packaging film between the two flattening rollers is appropriately loose and tight. The elastic member includes a spring.

6. The film feeding and color mark adjustment mechanism of a strip wrapping machine according to claim 1, characterized in that: The swing arm includes an integrated main rod and a support rod. The swing motor is connected to one end of the main rod to drive the main rod to swing. At least one support rod is provided on the other end of the main rod, and a buffer roller is installed at the end of each support rod.

7. The film feeding and color mark adjustment mechanism of a strip wrapping machine according to claim 1, characterized in that: The two swing rods are provided with two opposite left and right sides, the swing motor is connected to a transmission shaft, one end of the two swing rods is respectively connected to the two ends of the transmission shaft, and the two ends of the buffer roller are respectively installed on the other end of the two swing rods.

8. The film feeding and color mark adjustment mechanism of a strip wrapping machine according to claim 1, characterized in that: It also includes at least one group of tensioning components, each group of the tensioning components includes a tensioning roller and two groups of tensioning adjustment structures, the two groups of tensioning adjustment structures are arranged opposite to each other on the left and right, and each group of the tensioning adjustment structure includes a handwheel and a screw nut pair, the handwheel is driven and connected to the screw in the screw nut pair, and the two ends of the tensioning roller are respectively connected to the driving nuts in the two groups of screw nut pairs.

9. The film feeding and color mark adjustment mechanism of a strip wrapping machine according to claim 1, characterized in that: A film splicing platform is also provided on the conveying path of the packaging film. The film splicing platform is provided with guide rollers at both ends along the conveying direction of the packaging film. The packaging film passes around the film splicing platform through the guide rollers. The film splicing platform is used to connect the front and rear rolls of packaging film.

10. The film feeding and color mark adjustment mechanism of a strip wrapping machine according to claim 1, characterized in that: A film detection electric eye is also provided at a position close to the film feeding roller on the conveying path of the packaging film, for detecting whether the packaging film on the film feeding roller is used up.

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