An automatic labeling machine for PET plastic strapping

Abstract

This utility model discloses an automatic labeling machine for PET plastic steel strapping, relating to the field of packaging machinery; it includes a frame plate and mounted on the frame plate: an unwinding mechanism for unwinding the strapping; a guiding tensioning mechanism including three sets of tensioning guide wheels, which are staggered at the rear end of the unwinding mechanism; the conveying distance of each set of tensioning guide wheels can be independently adjusted; a labeling mechanism including two sets of limiting guide wheels, a label pressing roller, and a label winding and unwinding assembly, with the two sets of limiting guide wheels spaced apart at the rear end of the guiding tensioning mechanism; the label pressing roller is positioned between the two sets of limiting guide wheels; the label winding and unwinding assembly is positioned on one side of the front end of the label pressing roller; wherein, the surface of the label pressing roller is covered with a silicone layer; and a winding mechanism, positioned at the rear end of the two sets of limiting guide wheels, for winding the labeled strapping. This application is applicable to the automatic labeling of strapping of different sizes and solves the problems of low efficiency, positional misalignment, and insufficient label adhesion of manual labeling.

Description

Technical Field

[0001] This utility model relates to the field of packaging machinery, and more specifically, to an automatic labeling machine for PET plastic steel strapping. Background Technology

[0002] PET plastic strapping has gradually replaced traditional steel strapping due to its advantages such as high tensile strength, corrosion resistance, and recyclability. However, labeling is required to be affixed to the surface of the strapping before packaging, which currently relies mainly on manual labor and has the following drawbacks:

[0003] When labeling manually by hand, the smooth surface of the strapping makes it easy for labels to tilt or misalign, leading to difficulties in information recognition and a high scrap rate. PET strapping has low surface energy, and uneven pressure during manual application can easily cause air bubbles or curling edges, resulting in high rates of label detachment during warehousing and transportation. Existing automatic labeling machines are mostly designed for bottles, cans, or flat sheets, but there is currently no equipment specifically designed for the characteristics of PET strapping. Utility Model Content

[0004] The purpose of this invention is to provide an automatic labeling machine for PET plastic steel strapping, which can be applied to strapping of different sizes for automatic labeling and solves the problems of low efficiency, positional misalignment and insufficient label adhesion of manual labeling.

[0005] The embodiments of this utility model are implemented as follows:

[0006] This application provides an automatic labeling machine for PET plastic strapping, including a frame plate and a component mounted on the frame plate:

[0007] Unwinding mechanism, used for unwinding packing straps;

[0008] The guiding tensioning mechanism includes three sets of tensioning guide wheels, which are staggered at the rear end of the unwinding mechanism; the conveying distance of each set of tensioning guide wheels can be adjusted independently.

[0009] The labeling mechanism includes two sets of limiting guide rollers, one set of label pressing rollers, and a label winding and unwinding assembly. The two sets of limiting guide rollers are spaced apart at the rear end of the guiding and tensioning mechanism. The label pressing roller is disposed between the two sets of limiting guide rollers. The label winding and unwinding assembly is disposed on one side of the front end of the label pressing roller. The surface of the label pressing roller is covered with a silicone layer.

[0010] The winding mechanism is located at the rear end of the two sets of limiting guide wheels and is used to wind up the packaged strapping after labeling.

[0011] Furthermore, based on the aforementioned scheme, the unwinding mechanism includes an air shaft and a magnetic powder brake, the packing strap is wound around the outside of the air shaft, and the air shaft is connected to the output end of the magnetic powder brake.

[0012] Furthermore, based on the aforementioned scheme, each set of tensioning guide wheels includes a rotating rod, two tension rollers, and two side rollers. The rotating rod is rotatably mounted on the frame plate. The rotating rod is provided with a threaded section, and two sliders are sleeved on the rotating rod, one of which is threadedly connected to the threaded section.

[0013] The two tension rollers are rotatably disposed outside the slider, and the two side wheels are respectively sleeved on the two tension rollers;

[0014] A tension sensor is embedded in one of the tension rollers of one of the sets of tensioning guide rollers.

[0015] Furthermore, based on the aforementioned scheme, a ceramic bushing is provided on the outside of the tension roller.

[0016] Furthermore, based on the aforementioned scheme, the two sets of limiting guide wheels are horizontally arranged on the frame plate and driven to rotate in the same direction by a driving component.

[0017] Furthermore, based on the aforementioned scheme, two label rollers are provided, and the two label rollers are symmetrically arranged on the frame plate; the roller shafts of the label rollers pass through the two opposite frame plates, and their upper and lower sides respectively abut against the elastic elements arranged inside the frame plate.

[0018] Furthermore, based on the aforementioned scheme, the label roll-up assembly is disposed on the front side of one of the label pressing rollers; a hot air assembly is disposed on the opposite side of the label roll-up assembly, and the hot air assembly is fixed on the frame plate.

[0019] Furthermore, based on the aforementioned scheme, two sets of scraper assemblies are provided between the pressure roller and the rear limiting guide wheel, and the two sets of scraper assemblies are arranged symmetrically in the upper and lower parts;

[0020] The scraper assembly includes a connecting rod and a silicone plate; the connecting rod is bent, with one end elastically connected to the frame plate and the other end connected to the silicone plate; the silicone plate is inclined and has a horizontal pressing surface at the end near the packing strap for pressing against the packing strap.

[0021] Furthermore, based on the aforementioned scheme, a movable block is connected to the end of the connecting rod away from the silicone plate. The movable block is slidably disposed in the strip groove opened in the frame plate, and the movable block elastically abuts against the strip groove.

[0022] Compared with the prior art, the embodiments of this utility model have at least the following advantages or beneficial effects:

[0023] This application utilizes an unwinding mechanism to unwind the packing strap towards the rear end, a rewinding mechanism to rewind it, and three sets of staggered tensioning guide rollers for guidance and tensioning, forming a three-level tension control to ensure stable transport of the packing strap during labeling. The conveying distance of the tensioning guide rollers can be independently adjusted to accommodate packing straps of different widths, preventing positional shifts during transport that could lead to inaccurate labeling. Two sets of limiting guide rollers are installed at the rear end of the tensioning guide rollers, horizontally spaced to assist in transporting the packing strap and horizontally limit its movement for labeling. A label pressing roller and a label winding and unwinding assembly are installed between these rollers. The label winding and unwinding assembly peels the label from the backing paper and affixes it to the packing strap, which is then pressed firmly by the label pressing roller at the rear end. The label pressing roller is coated with a silicone layer, giving it a certain amount of deformation to match the rigidity of the strap material and fill gaps caused by unevenness on the strap surface or slight label warping, thus ensuring the label adheres firmly and is not easily detached. This application can be applied to automatic labeling of packing straps of different sizes and solves the problems of low efficiency, positional misalignment and insufficient label adhesion of manual labeling. Attached Figure Description

[0024] To more clearly illustrate the technical solutions of the embodiments of this utility model, the drawings used in the embodiments will be briefly introduced below. It should be understood that the following drawings only show some embodiments of this utility model and should not be regarded as a limitation on the scope. For those skilled in the art, other related drawings can be obtained based on these drawings without creative effort.

[0025] Figure 1 This is a schematic diagram of the structure of the automatic labeling machine for PET plastic steel strapping, an embodiment of this utility model;

[0026] Figure 2 This is a schematic diagram of the tensioning guide wheel in an embodiment of the present invention;

[0027] Figure 3 This is a schematic diagram of the structure of the label roller in an embodiment of the present invention;

[0028] Figure 4 This is a top view of the scraper assembly according to an embodiment of the present utility model.

[0029] Icons: 1-Frame plate, 11-Strip groove, 2-Unwinding mechanism, 3-Tension guide roller, 31-Rotating rod, 32-Tension roller, 33-Side roller, 34-Threaded section, 35-Slider, 4-Limiting guide roller, 5-Label pressing roller, 51-Silicone layer, 52-Elastic element, 6-Label roll-up assembly, 7-Rewinding mechanism, 8-Hot air assembly, 91-Connecting rod, 92-Silicone plate, 93-Moving block. Detailed Implementation

[0030] The embodiments of this application will now be described in detail with reference to the accompanying drawings.

[0031] Please refer to Figures 1-4 The image shows a schematic diagram of the overall structure of an automatic PET plastic strapping labeling machine.

[0032] This embodiment provides an automatic labeling machine for PET plastic strapping, including a frame plate 1 and components mounted on the frame plate 1:

[0033] Unwinding mechanism 2 is used for unwinding the packing strap;

[0034] The guiding tensioning mechanism includes three sets of tensioning guide wheels 3, which are staggered at the rear end of the unwinding mechanism 2; the conveying distance of each set of tensioning guide wheels 3 can be adjusted independently.

[0035] The labeling mechanism includes two sets of limiting guide wheels 4, one set of label pressing rollers 5, and a label rolling assembly 6. The two sets of limiting guide wheels 4 are spaced apart at the rear end of the guide tensioning mechanism; the label pressing roller 5 is located between the two sets of limiting guide wheels 4; the label rolling assembly 6 is located on one side of the front end of the label pressing roller 5; wherein, the surface of the label pressing roller 5 is covered with a silicone layer 51.

[0036] The winding mechanism 7 is located at the rear end of the two sets of limit guide wheels 4 and is used to wind up the packaging tape after labeling.

[0037] The following will further describe an automatic labeling machine for PET plastic strapping, as described in this exemplary embodiment.

[0038] In some embodiments, the aforementioned frame plate 1 consists of two plates, arranged opposite each other on the frame. The unwinding mechanism 2 is located on one of the frame plates 1 and includes an air shaft and a magnetic powder brake. The packing tape is wound around the outside of the air shaft, and the air shaft is connected to the output end of the magnetic powder brake. The air shaft expands to fix the packing tape roll. The magnetic powder brake is an existing device that adjusts the braking torque based on feedback from a tension sensor to prevent the tape from loosening due to inertia.

[0039] In some embodiments, the aforementioned guiding tensioning mechanism includes three sets of tensioning guide wheels 3, which are staggered vertically at the rear end of the unwinding mechanism 2 for tensioning the packing strap. Each set of tensioning guide wheels 3 includes a rotating rod 31, two tension rollers 32, and two side wheels 33. The rotating rod 31 is rotatably mounted on the frame plate 1, one end of which can be locked with a nut, and a rotating handle can be provided at the other end for easy rotation control. The rotating rod 31 is provided with a threaded section 34, and two sliders 35 are sleeved on the rotating rod 31. One slider 35 is threadedly connected to the threaded section 34; the other slider 35 is fixed on the rotating rod 31. When the rotating rod 31 is rotated, the threaded slider 35 can move axially on the threaded section 34. The two tension rollers 32 are rotatably mounted outside the sliders 35, and the two side wheels 33 are respectively sleeved on the two tension rollers 32. The moving slider 35 drives the corresponding tension roller 32 and side wheel 33 to move synchronously, thus moving them closer to or further away from the other tension roller 32 and side wheel 33, thereby adjusting the spacing of the tension guide rollers 3 to accommodate strapping of different widths. It should be noted that the length of the two tension rollers 32 should not be too long to avoid interference when they are close together; shorter lengths are also acceptable, as long as the strapping is close to the opposite sides of the two side wheels 33 on both sides. One of the tension rollers 32 in one set of tension guide rollers 3 is equipped with a tension sensor to detect the tension in real time and transmit the data to the unwinding and rewinding mechanism 7 to control the tension of the strapping at a suitable value.

[0040] As a preferred embodiment, the tension roller 32 is provided with a ceramic bushing on its exterior to reduce the coefficient of friction and reduce wear on the packing strap.

[0041] In some embodiments, the labeling mechanism includes two sets of limiting guide rollers 4, one set of label pressing rollers 5, and a label winding and unwinding assembly 6. The two sets of limiting guide rollers 4 are horizontally spaced at the rear end of the guiding and tensioning mechanism to form a labeling station. The label pressing roller 5 is positioned between the two sets of limiting guide rollers 4; the label winding and unwinding assembly 6 is positioned on one side of the front end of the label pressing roller 5; after the label is peeled off by the label winding and unwinding assembly 6, it is applied to the packing strap and then pressed together by the label pressing roller 5 at the rear end. The label pressing roller 5 has a silicone layer 51 covering its surface, giving it a certain amount of deformation to match the rigidity of the strap material and fill gaps caused by unevenness on the strap surface or slight label warping, thus ensuring the label adheres firmly and is not easily detached.

[0042] As a preferred implementation, the two sets of limiting guide wheels 4 are horizontally arranged on the frame plate 1 and driven to rotate in the same direction by the driving component. While guiding, they assist in conveying the packing strap backward and also facilitate labeling with the labeling roller 5.

[0043] In a preferred embodiment, two label-pressing rollers 5 are provided, symmetrically arranged vertically on the frame plate 1. Since the strapping strap has low rigidity, the two symmetrically arranged label-pressing rollers 5 can form mutual support points. The roller shafts of the label-pressing rollers 5 rotate through the two opposing frame plates 1, and their upper and lower sides respectively abut against the elastic elements 52 disposed inside the frame plate 1, forming a floating pressing action. The two label-pressing rollers 5 can swing slightly up and down vertically, automatically adapting to the undulations of the strap surface, providing a 3-5mm buffer stroke when the strap surface jumps, maintaining a constant pressing pressure. Specifically, the elastic elements 52 can be cylindrical springs or disc springs.

[0044] In a preferred embodiment, the label roll-up assembly 6 is disposed in front of one of the label pressing rollers 5; a hot air assembly 8 is disposed on the opposite side of the label roll-up assembly 6, and the hot air assembly 8 is fixed on the frame plate 1. The hot air assembly 8 can be composed of a hot air generator and an air duct. The hot air generator is mounted on the frame plate 1 and is an existing device. The air duct extends toward the packing strap and is fixed above the packing strap, located on the opposite side of the label roll-up assembly 6. It can soften the label adhesive layer, making the label easier to stretch and adhere to the curved surface.

[0045] It should be noted that the label roll-up assembly 6 can be any existing label release mechanism, which generally includes a label roll-up tray, a peeling plate, and a take-up roller. In this embodiment, the peeling plate is set below the packing strap, close to the packing strap, and located in front of the label pressing roller 5. It is set at an angle so that the label can adhere to the packing strap after being peeled off and be immediately pressed by the label pressing roller 5.

[0046] In a preferred embodiment, two sets of scraper assemblies are provided between the labeling roller 5 and the rear limiting guide wheel 4, with the two sets of scraper assemblies arranged symmetrically vertically. Each scraper assembly includes a connecting rod 91 and a silicone plate 92. The connecting rod 91 is bent, with one end elastically connected to the frame plate 1 and the other end connected to the silicone plate 92. The silicone plate 92 is inclined, and its end near the packing strap has a horizontal pressing surface for pressing firmly against the packing strap. By providing scraper assemblies at the rear end of the labeling roller 5, the labeling roller 5 is responsible for 90% of the label adhesion, while the scraper assembly performs secondary scraping to eliminate edge warping, ensuring the label fully adheres to the strap surface. It should be noted that, since the packing strap is located between the two frame plates 1, to ensure the silicone plate 92 covers the packing strap and remains stable during scraping, the connecting rod 91 is designed to be bent, bending from the middle towards both sides of the frame plates 1 for easy installation on the frame plates 1. The coordinated operation of hot air, the labeling roller 5, and the scraper assembly significantly improves the labeling rate.

[0047] Because the strapping needs to be cut to a relatively long length for use, and the labels are also relatively long to cover a larger area for easy identification, the silicone plate 92 is tilted so that only a portion of the horizontal pressure surface remains on one end of the strapping. This allows for continuous pressure on the labeling surface without damaging the strapping.

[0048] In a preferred embodiment, the end of the connecting rod 91 furthest from the silicone plate 92 is connected to a movable block 93. The movable block 93 is slidably disposed within the strip groove 11 opened in the frame plate 1, and the movable block 93 elastically abuts against the strip groove 11. By also configuring the connecting rod 91 as an up-and-down floating bonding structure, elastic deformation and dynamic adjustment of the label can be achieved, thereby improving the labeling quality.

[0049] Furthermore, unless otherwise explicitly specified or limited, the terms "installation" and "connection" in this application embodiment should be interpreted broadly. For example, "connection" can be a detachable connection or a non-detachable connection; it can be a direct connection or an indirect connection through an intermediate medium. The terms "upper," "lower," "left," "right," "inner," "outer," and "side," etc., are merely for reference to the direction in the accompanying drawings or the usual placement of the product during use. They are only for clearly describing this application and do not indicate or imply that the device or component referred to must have a specific orientation, or be constructed and operated in a specific orientation. They should not be construed as limitations on this application. The terms "first," "second," etc., are only used for distinguishing descriptions and should not be construed as indicating or implying relative importance; "multiple" refers to at least two. In this application embodiment, the limitations on relative positional relationships such as parallel, perpendicular, and aligned are all relative to the current technological level and are not absolutely strict limitations. Slight deviations are allowed; approximations of parallel, perpendicular, and aligned are all acceptable. For example, "A and B are parallel" means that A and B are parallel or approximately parallel, and the angle between A and B can be between 0 degrees and 10 degrees.

[0050] The above are only some embodiments and implementation methods of this application. The protection scope of this application is not limited thereto. In the absence of conflict, the embodiments and features in the embodiments of this application can be combined with each other. Any combination of features in different embodiments is also within the protection scope of this application. Any changes or substitutions that can be easily conceived by those skilled in the art within the scope of the technology disclosed in this application should be included within the protection scope of this application.

Claims

1. A PET plastic steel packing belt automatic labeling machine, characterized in that, Includes the rack plate and the components mounted on the rack plate: Unwinding mechanism, used for unwinding packing straps; The guiding tensioning mechanism includes three sets of tensioning guide wheels, which are staggered at the rear end of the unwinding mechanism; the conveying distance of each set of tensioning guide wheels can be adjusted independently. The labeling mechanism includes two sets of limiting guide rollers, one set of label pressing rollers, and a label winding and unwinding assembly. The two sets of limiting guide rollers are spaced apart at the rear end of the guiding and tensioning mechanism. The label pressing roller is disposed between the two sets of limiting guide rollers. The label winding and unwinding assembly is disposed on one side of the front end of the label pressing roller. The surface of the label pressing roller is covered with a silicone layer. The winding mechanism is located at the rear end of the two sets of limiting guide wheels and is used to wind up the packaged strapping after labeling.

2. The PET plastic steel packing belt automatic labeling machine according to claim 1, characterized in that, The unwinding mechanism includes an air shaft and a magnetic powder brake. The packing strap is wound around the outside of the air shaft, and the air shaft is connected to the output end of the magnetic powder brake.

3. The automatic labeling machine for PET plastic strapping according to claim 1, characterized in that, Each set of tensioning guide wheels includes a rotating rod, two tension rollers and two side rollers. The rotating rod is rotatably mounted on the frame plate. The rotating rod is provided with a threaded section. Two sliders are sleeved on the rotating rod, one of which is threadedly connected to the threaded section. The two tension rollers are rotatably disposed outside the slider, and the two side wheels are respectively sleeved on the two tension rollers; A tension sensor is embedded in one of the tension rollers of one of the sets of tensioning guide rollers.

4. The automatic labeling machine for PET plastic strapping according to claim 3, characterized in that, The tension roller is provided with a ceramic bushing on its exterior.

5. The automatic labeling machine for PET plastic strapping according to claim 1, characterized in that, The two sets of limiting guide wheels are horizontally arranged on the frame plate and are driven to rotate in the same direction by a driving component.

6. The automatic labeling machine for PET plastic strapping according to claim 1, characterized in that, Two label rollers are provided, and the two label rollers are symmetrically arranged on the frame plate. The roller shafts of the label rollers pass through the two opposite frame plates, and their upper and lower sides respectively abut against the elastic elements arranged inside the frame plate.

7. The automatic labeling machine for PET plastic strapping according to claim 6, characterized in that, The label winding assembly is disposed on the front side of one of the label pressing rollers; a hot air assembly is disposed on the opposite side of the label winding assembly, and the hot air assembly is fixed on the frame plate.

8. The automatic labeling machine for PET plastic strapping according to claim 7, characterized in that, Two sets of scraper assemblies are provided between the pressure roller and the rear limit guide wheel, and the two sets of scraper assemblies are arranged symmetrically above and below. The scraper assembly includes a connecting rod and a silicone plate; the connecting rod is bent, with one end elastically connected to the frame plate and the other end connected to the silicone plate; the silicone plate is inclined and has a horizontal pressing surface at the end near the packing strap for pressing against the packing strap.

9. The automatic labeling machine for PET plastic strapping according to claim 8, characterized in that, The end of the connecting rod away from the silicone plate is connected to a movable block. The movable block is slidably disposed in the strip groove opened in the frame plate, and the movable block elastically abuts against the strip groove.

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