Plastic packaging slitting device

Abstract

The utility model discloses a kind of plastic packaging slitting device, including mounting bracket, winding roller, conveying mechanism and slitting mechanism, wherein, winding roller is set on mounting bracket, slitting mechanism is set on mounting bracket, and located above winding roller, conveying mechanism includes multiple press rolls, multiple conveying rollers, conveying belt and first driving mechanism, wherein, multiple press rolls are rotatably connected on mounting bracket by first driving mechanism, multiple conveying rollers are rotatably connected on mounting bracket, and located below multiple press rolls, conveying belt is rotatably connected on mounting bracket by multiple conveying rollers, and with multiple press rolls synchronous adhesion rotation. Therefore, adopt multiple roll cooperation tensioning and dynamic fixing before slitting combination, conveying roller and conveying belt cooperate, promote the smooth development of film pressure conveying, cooperate the development press before slitting, improve the film deformation caused by cutter depression, improve slitting quality, effectively reduce the number of stop adjustment, suitable for high-speed production.

Description

Technical Field

[0001] This utility model relates to the technical field of plastic packaging processing, and in particular to a plastic packaging cutting device. Background Technology

[0002] Plastic packaging slitting equipment is a device used to cut roll-type plastic packaging materials (such as packaging bag films) into specific widths or lengths as required. It is widely used in packaging production lines in the food, pharmaceutical, and daily chemical industries.

[0003] In related technologies, plastic packaging slitting devices typically consist of a feeding roller, a guide roller, a slitting mechanism, and a winding device. The guide roller is responsible for applying tension and guiding the film during the unwinding process. However, when the tension is improperly controlled (too high or too low), the film is prone to deviation or wrinkling, leading to a decrease in slitting accuracy. This problem often requires frequent shutdowns to adjust the tension or perform correction operations, severely impacting production continuity. Furthermore, traditional slitting mechanisms lack localized film fixation during cutting, easily causing quality problems such as skewed cuts or burrs. Summary of the Invention

[0004] This utility model aims to at least partially solve one of the technical problems in the related art.

[0005] Therefore, the purpose of this utility model is to propose a plastic packaging slitting device that combines multi-roller coordinated tensioning with dynamic fixing before slitting. The conveyor rollers and conveyor belt work together to promote the smooth unfolding of the film conveyed by the rollers. Combined with the unfolding and pressing before slitting, it improves the film deformation caused by the downward pressure of the cutter, improves the slitting quality, and combines continuous conveying with dynamic slitting to effectively reduce the number of downtime adjustments, making it suitable for high-speed production.

[0006] To achieve the above objectives, this utility model proposes a plastic packaging slitting device, including a mounting frame, a take-up roller, a conveying mechanism, and a slitting mechanism. The take-up roller is mounted on the mounting frame, and the slitting mechanism is mounted on the mounting frame and located above the take-up roller. The conveying mechanism includes multiple pressure rollers, multiple conveying rollers, a conveyor belt, and a first drive mechanism. The multiple pressure rollers are rotatably connected to the mounting frame via the first drive mechanism, and the multiple conveying rollers are rotatably connected to the mounting frame and located below the multiple pressure rollers. The conveyor belt is rotatably connected to the mounting frame via the multiple conveying rollers and rotates synchronously with the multiple pressure rollers.

[0007] In addition, the plastic packaging cutting device proposed above according to this utility model may also have the following additional technical features: Specifically, the outer surface of the pressure roller is provided with two symmetrically arranged extension strips.

[0008] Specifically, the slitting mechanism includes a carrier plate, a support plate, a second driving device, a connecting frame, a cutter, and two symmetrically arranged flattening assemblies. The carrier plate is mounted on the mounting frame. The connecting frame is movably connected to the carrier plate via the second driving device and is located below the carrier plate. The cutter is mounted on the connecting frame. The support plate is mounted on the mounting frame and is located below the cutter. The support plate has a through hole, the position of which corresponds to the position of the cutter. The two symmetrically arranged flattening assemblies are movably connected to the connecting frame.

[0009] Specifically, the flattening assembly includes two symmetrically arranged support blocks, a limiting rod, an elastic element, two symmetrically arranged connecting rods, and a pressing wheel. The two symmetrically arranged support blocks are disposed on the connecting frame, the limiting rod is disposed between the two symmetrically arranged support blocks, one end of the two symmetrically arranged connecting rods is rotatably connected to the limiting rod, the pressing wheel is rotatably connected to the other end of the two symmetrically arranged connecting rods, and the elastic element is wound around the limiting rod and connected to the support blocks and the connecting rods respectively.

[0010] Specifically, the connecting frame is arranged in an isosceles trapezoidal structure, and the interior of the connecting frame is arranged in a cavity.

[0011] Compared with the prior art, the technical solution provided by this utility model has the following beneficial effects: The plastic packaging cutting device of this utility model uses multiple conveying rollers and conveyor belts to work together in roller pressing, and is equipped with two symmetrically arranged extension strips to apply pressure evenly, so as to ensure that the film remains flat and unfolded during the conveying process and reduce film deviation and wrinkling.

[0012] The slitting mechanism adopts a dynamic fixing design. Before the cutter presses down, the film is precisely positioned and fixed by the outward figure-eight pressing rollers, which avoids film deformation caused by the cutter pressing down, improves slitting accuracy and product quality. By combining continuous conveying with dynamic slitting, the number of downtime adjustments is effectively reduced, making it suitable for high-speed continuous production.

[0013] Additional aspects and advantages of this invention will be set forth in part in the description which follows, and in part will be obvious from the description, or may be learned by practice of the invention. Attached Figure Description

[0014] The above and / or additional aspects and advantages of this utility model will become apparent and readily understood from the following description of the embodiments taken in conjunction with the accompanying drawings, in which: Figure 1 This is a schematic diagram of the overall structure of the plastic packaging cutting device of this utility model; Figure 2This is a front view of the plastic packaging cutting device of this utility model; Figure 3 This is a schematic diagram of the internal structure of the plastic packaging cutting device of this utility model; Figure 4 This is a top view of the plastic packaging cutting device of this utility model; Figure 5 This is a schematic diagram of the flattening component structure of the plastic packaging cutting device of this utility model.

[0015] As shown in the figure: 1. Mounting frame; 2. Take-up roller; 3. Conveying mechanism; 31. Pressure roller; 311. Extension strip; 32. Conveying roller; 33. Conveyor belt; 34. First drive mechanism; 4. Slitting mechanism; 41. Bearing plate; 42. Support plate; 421. Through hole; 43. Second drive device; 44. Connecting frame; 45. Cutter; 46. Flattening assembly; 461. Support block; 462. Limiting rod; 463. Elastic element; 464. Connecting rod; 465. Pressure roller. Detailed Implementation

[0016] The embodiments of the present invention are described in detail below, examples of which are shown in the accompanying drawings, wherein the same or similar reference numerals denote the same or similar elements or elements having the same or similar functions throughout. The embodiments described below with reference to the accompanying drawings are exemplary and intended to explain the present invention, and should not be construed as limiting the present invention. Rather, the embodiments of the present invention include all variations, modifications, and equivalents falling within the spirit and scope of the appended claims.

[0017] The plastic packaging cutting device of this utility model embodiment will now be described with reference to the accompanying drawings.

[0018] like Figures 1-5 As shown, the plastic packaging slitting device of this utility model embodiment may include a mounting frame 1, a winding roller 2, a conveying mechanism 3, and a slitting mechanism 4.

[0019] The take-up roller 2 is mounted on the mounting frame 1, and the slitting mechanism 4 is mounted on the mounting frame 1 and located above the take-up roller 2.

[0020] It should be noted that the mounting frame 1 can stably support the winding roller 2, the conveying mechanism 3 and the slitting mechanism 4. The mounting frame 1 is L-shaped and is fixed by bolts inserted through the through holes 421 at the corners of the bottom wall. The conveying mechanism 3 and the slitting mechanism 4 are adjacent to each other and horizontally distributed, which facilitates the continuous conveying of the film.

[0021] The conveying mechanism 3 includes multiple pressure rollers 31, multiple conveying rollers 32, a conveyor belt 33, and a first drive mechanism 34.

[0022] Among them, multiple pressure rollers 31 are rotatably connected to the mounting frame 1 through the first drive mechanism 34, multiple conveyor rollers 32 are rotatably connected to the mounting frame 1 and located below the multiple pressure rollers 31, and conveyor belt 33 is rotatably connected to the mounting frame 1 through the multiple conveyor rollers 32 and rotates synchronously with the multiple pressure rollers 31.

[0023] It should be noted that the first drive mechanism 34 proposed in the above embodiment adopts a rotary motor, multiple connecting belts and two meshing gears. The rotating shafts of multiple pressure rollers 31 and multiple conveying rollers 32 respectively pass through the mounting frame 1 and extend to the other side of the mounting frame 1. Multiple connecting belts are sequentially wound around the rotating shafts of two adjacent pressure rollers 31. The output end of the rotary motor is connected to the end of one of the pressure rollers 31. At the same time, gears are respectively set on the rotating shafts of the pressure rollers 31 and the rotating shafts of the conveying rollers 32, and the two gears are in close contact with each other. Multiple belts and two meshing gears realize the synchronous rotation of multiple pressure rollers 31 and multiple conveying rollers 32 in opposite directions. The conveying belt 33 is in close contact with multiple pressure rollers 31, and uniform pressure is applied during the film conveying process.

[0024] Specifically, in the actual slitting process, the relevant staff place the film roll on the mounting frame 1 through the take-up roller 2. In the initial state, the position of the mounting frame 1 is fixed and the cutter 45 is at the highest point.

[0025] During unwinding, the front end of the film roll is pulled out, the film roll rotates counterclockwise, passes under the conveyor belt 33, and then passes between the pressure roller 31 and the conveyor belt 33. When passing it in, the front end of the film is kept in the center. The first drive mechanism 34 drives multiple pressure rollers 31 and multiple conveyor rollers 32 to rotate synchronously. The film is adhered between the conveyor belt 33 and the pressure rollers 31 and rotates in opposite directions. The two symmetrically arranged extension strips 311 on the surface of the multiple pressure rollers 31 pull the film to both sides of the conveying direction, thus unfolding the film.

[0026] During slitting, the pressed and unfolded film moves onto the support plate 42, the second drive device 43 is activated, and the cutter 45 is pushed up and down, and the two flattening components 46 move and press synchronously to achieve regular slitting of the film.

[0027] In one embodiment of this utility model, such as Figure 1 , Figure 3 and Figure 4 As shown, the outer surface of the pressure roller 31 is provided with two symmetrically arranged extension strips 311.

[0028] It should be noted that the extension strip 311 described in this embodiment is made of rubber and is arranged in a spiral shape, adhering to the outer surface of the pressure roller 31. When the pressure roller 31 rolls, the two extension strips 311 rotate synchronously, pushing the film to unfold on both sides of the film conveying direction.

[0029] In one embodiment of this utility model, such as Figure 2 , Figure 3 and Figure 5 As shown, the slitting mechanism 4 includes a carrier plate 41, a support plate 42, a second drive device 43, a connecting frame 44, a cutter 45, and two symmetrically arranged flattening assemblies 46.

[0030] The support plate 41 is mounted on the mounting frame 1. The connecting frame 44 is movably connected to the support plate 41 via the second driving device 43 and is located below the support plate 41. The cutter 45 is mounted on the connecting frame 44. The support plate 42 is mounted on the mounting frame 1 and is located below the cutter 45. The support plate 42 has a through hole 421, the position of which corresponds to the position of the cutter 45. Two symmetrically arranged flattening components 46 are movably connected to the connecting frame 44.

[0031] It should be noted that the second driving device 43 proposed in the above embodiment adopts a cylinder. The extension and retraction end of the cylinder drives the connecting frame 44, the cutter 45 and the two symmetrically arranged flattening components 46 to adjust up and down. The cutter 45 can be an electric heating knife. The wires and control module can be stored in the connecting frame 44. The two symmetrically arranged flattening components 46 contact the two side walls of the connecting frame 44 respectively and are arranged in a figure-eight structure. When the flattening mechanism presses the film, it rolls in opposite directions to spread the film flat and avoid the film deformation caused by the cutter 45 pressing down.

[0032] In one embodiment of this utility model, such as Figure 2 , Figure 3 and Figure 5 As shown, the flattening assembly 46 includes two symmetrically arranged support blocks 461, a limiting rod 462, an elastic element 463, two symmetrically arranged connecting rods 464, and a pressing wheel 465.

[0033] Two symmetrically arranged support blocks 461 are disposed on the connecting frame 44, a limiting rod 462 is disposed between the two symmetrically arranged support blocks 461, one end of two symmetrically arranged connecting rods 464 is rotatably connected to the limiting rod 462, a pressing wheel 465 is rotatably connected to the other end of the two symmetrically arranged connecting rods 464, and an elastic element 463 is wound around the limiting rod 462 and is connected to the support block 461 and the connecting rod 464 respectively.

[0034] It should be noted that the elastic element 463 proposed in the above embodiment is a torsion spring. The torsion spring is connected to the support block 461 and the connecting rod 464. The torsion spring presses down on the connecting rod 464, so that the connecting rod 464 fits against the side wall of the connecting frame 44, so that the pressing wheel 465 is kept at the lowest point. When the pressing wheel 465 contacts the film, it rolls away from the side of the connecting frame 44. At the same time, the torsion spring is subjected to reverse force, pushing the film to unfold and press.

[0035] In one embodiment of this utility model, such as Figure 5 As shown, the connecting frame 44 is arranged in an isosceles trapezoidal structure, and the interior of the connecting frame 44 is arranged in a cavity.

[0036] It should be noted that the connecting frame 44 described in this embodiment can accommodate the connecting wires and control module of the cutter 45, while the two flattening mechanisms are supported by the inclined outer walls on both sides.

[0037] In summary, the plastic packaging slitting device of this utility model adopts a combination of multi-roller coordinated tensioning and dynamic fixing before slitting. The conveyor rollers and conveyor belt work together to promote the smooth unfolding of the film conveyed by the rollers. Combined with the unfolding and pressing before slitting, it improves the film deformation caused by the downward pressure of the cutter and improves the slitting quality. The combination of continuous conveying and dynamic slitting effectively reduces the number of downtime adjustments and is suitable for high-speed production.

[0038] In the description of this specification, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of indicated technical features. Thus, a feature defined as "first" or "second" may explicitly or implicitly include at least one of that feature. In the description of this utility model, "a plurality of" means at least two, such as two, three, etc., unless otherwise explicitly specified.

[0039] In the description of this specification, the references to terms such as "one embodiment," "some embodiments," "example," "specific example," or "some examples," etc., indicate that a specific feature, structure, material, or characteristic described in connection with that embodiment or example is included in at least one embodiment or example of the present invention. In this specification, the illustrative expressions of the above terms do not necessarily refer to the same embodiment or example. Furthermore, the specific features, structures, materials, or characteristics described may be combined in any suitable manner in one or more embodiments or examples. Moreover, without contradiction, those skilled in the art can combine and integrate the different embodiments or examples described in this specification, as well as the features of different embodiments or examples.

[0040] Although embodiments of the present invention have been shown and described above, it is understood that the above embodiments are exemplary and should not be construed as limiting the present invention. Those skilled in the art can make changes, modifications, substitutions and variations to the above embodiments within the scope of the present invention.

Claims

1. A plastic packaging cutting device, characterized in that, It includes a mounting frame, take-up rollers, conveying mechanism, and slitting mechanism, among which, The take-up roller is mounted on the mounting frame; The slitting mechanism is mounted on the mounting frame and located above the take-up roller; The conveying mechanism includes multiple pressure rollers, multiple conveying rollers, a conveyor belt, and a first drive mechanism, wherein, The plurality of pressure rollers are rotatably connected to the mounting frame via the first drive mechanism; The plurality of conveying rollers are rotatably connected to the mounting frame and located below the plurality of pressure rollers; The conveyor belt is rotatably connected to the mounting frame via multiple conveying rollers and rotates synchronously with multiple pressure rollers; The outer surface of the pressure roller is provided with two symmetrically arranged extension strips; The slitting mechanism includes a bearing plate, a support plate, a second driving device, a connecting frame, a cutter, and two symmetrically arranged flattening assemblies, wherein... The support plate is disposed on the mounting frame; The connecting frame is movably connected to the support plate via the second driving device and is located below the support plate; The cutter is disposed on the connecting frame; The support plate is disposed on the mounting bracket and is located below the cutter. The support plate has a through hole, the position of which corresponds to the position of the cutter. Two symmetrically arranged flattening components are movably connected to the connecting frame.

2. The plastic packaging cutting device according to claim 1, characterized in that, The flattening assembly includes two symmetrically arranged support blocks, a limiting rod, an elastic element, two symmetrically arranged connecting rods, and a pressing wheel, wherein... Two symmetrically arranged support blocks are disposed on the connecting frame; The limiting rod is disposed between two symmetrically arranged support blocks; One end of each of the two symmetrically arranged connecting rods is rotatably connected to the limiting rod; The clamping wheel is rotatably connected to the other end of two symmetrically arranged connecting rods; The elastic element is wound around the limiting rod and is connected to the support block and the connecting rod respectively.

3. The plastic packaging cutting device according to claim 1, characterized in that, The connecting frame is arranged in an isosceles trapezoidal structure, and the interior of the connecting frame is a cavity.

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