A cutting device for packaging bags

Abstract

The utility model discloses a slitting device of packaging bag, including unwinding mechanism, rectification mechanism and slitting mechanism, be provided with the line cutting mechanism between rectification mechanism and slitting mechanism, the line cutting mechanism includes two guide rollers, and the axle of two guide rollers is located on the same horizontal line, and be provided with the adjusting roller between two guide rollers, adjusting roller and guide roller are connected on the fixed plate, and the lateral portion on fixed plate is connected with adjusting assembly, adjusting assembly is connected with adjusting roller, the top of guide roller is provided with the support, and the lower extreme of support is connected with laser line cutting assembly, and the intermediate link of slitting and winding in prior art is saved and is transferred to the easy tear line processing equipment, and the wide compound plastic film is directly completed easy tear line processing after rectification, and then immediately enters the slitting procedure, realizes once feeding, and multiple procedure continuous completion, and improves the continuous operation ability of production line.

Description

Technical Field

[0001] This utility model belongs to the field of sanitary napkin packaging technology, and specifically relates to a packaging bag cutting device. Background Technology

[0002] The composite plastic packaging bag for sanitary napkins is a plastic product used to package sanitary napkins. The process of processing sanitary napkin packaging bags using a slitting machine involves placing a roll of wide composite plastic film onto the unwinding mechanism of the slitting machine. After passing through a correction mechanism, the wide composite plastic film reaches the slitting mechanism, where it is divided into single rolls of narrow packaging bag film. These single rolls of narrow packaging bag film are then individually processed with easy-tear lines. The easy-tear lines are created by laser perforation on the packaging bag, allowing users to easily access the sanitary napkins inside.

[0003] In the aforementioned processing of sanitary napkin packaging bags, the tear line is processed after the slitting machine rewinds, requiring a separate, additional process. Currently, the slitting machines used in factories have sufficient space between the web-correcting mechanism and the slitting mechanism. This space is perfectly adequate for installing a tear line cutting device, meaning the cutting process is performed after web correction and before slitting. Therefore, this invention provides a new packaging bag slitting device. Utility Model Content

[0004] The purpose of this invention is to provide a packaging bag cutting device, thereby overcoming the shortcomings of the prior art where the easy-tear line processing requires a separate step and the production process is fragmented. The specific technical solution is as follows: A packaging bag slitting device includes an unwinding mechanism, a correction mechanism, and a slitting mechanism. A tangent mechanism is provided between the correction mechanism and the slitting mechanism. The tangent mechanism includes two guide rollers, the axes of which are located on the same horizontal line. An adjusting roller is provided between the two guide rollers. The adjusting roller and the guide roller are connected to a fixed plate. An adjusting component is connected to the side of the fixed plate and is connected to the adjusting roller. A bracket is provided above the guide roller, and a laser tangent component is connected to the lower end of the bracket.

[0005] Preferably, the fixing plate is provided with clearance holes, and both ends of the adjusting roller can move within the clearance holes.

[0006] Preferably, the adjusting assembly includes an elastic support plate, a fixed block is connected to the elastic support plate, a pushing component is connected to the top of the fixed block, the end of the adjusting roller passes through the fixed plate and is connected to the fixed block, and the adjusting roller is rotatable on the fixed block.

[0007] Preferably, the pushing component includes a mounting plate connected to the fixed plate, a support plate connected to the mounting plate, a pushing cylinder connected to the lower end of the support plate, and the output end of the pushing cylinder connected to the fixed block.

[0008] Preferably, a spring is connected below the elastic support plate, the spring is connected to the support block, and the support block is connected to the fixed plate through a connecting plate.

[0009] Preferably, a bearing is connected inside the fixing block, and the end of the adjusting roller is connected inside the bearing.

[0010] Preferably, a connecting block is provided at the upper end of the fixing block, and a connecting hole is provided on the connecting block.

[0011] Compared with existing technologies, this utility model incorporates a tangent mechanism between the correction mechanism and the slitting mechanism to process easy-tear threads, which has the following advantages: 1. It eliminates the intermediate steps (including transfer, secondary feeding, equipment debugging, etc.) of the existing technology after slitting and winding to the easy-tear line processing equipment. After the wide-width composite plastic film is corrected, the easy-tear line processing is completed directly, and then it immediately enters the slitting process. This realizes one feeding and multiple processes are completed continuously, improving the continuous operation capability of the production line.

[0012] 2. The adjusting component in the tangent mechanism of this utility model can change the film tension by adjusting the height of the adjusting roller. Combined with the laser tangent component, it can quickly adapt to the processing needs of packaging bag film, shorten the parameter adjustment time during production changeover, and improve the equipment's responsiveness to orders of multiple specifications. Attached Figure Description

[0013] To more clearly illustrate the technical solutions of the embodiments of the present invention, the accompanying drawings used in the description of the embodiments will be briefly introduced below. In all the drawings, similar elements or parts are generally identified by similar reference numerals. In the drawings, the elements or parts are not necessarily drawn to scale.

[0014] Figure 1 This is a schematic diagram of the structure of a packaging bag cutting device provided by this utility model; Figure 2 This is a top view of a packaging bag cutting device provided by this utility model; Figure 3 This is a schematic diagram of the tangent mechanism structure of a packaging bag cutting device provided by this utility model; Figure 4 This is a schematic diagram of the tangent mechanism structure of a packaging bag cutting device provided by this utility model; Figure 5This is a schematic diagram of the tangent mechanism structure of a packaging bag cutting device provided by this utility model; Figure 6 This is a schematic diagram of the movement of the tangent mechanism and the composite plastic film provided by this utility model. Detailed Implementation

[0015] 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. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0016] In the description of this utility model, it should be noted that the terms "center", "longitudinal", "lateral", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "top surface", "bottom surface", "inner", "outer", "inner side", "outer side", etc., indicating the orientation or positional relationship are based on the orientation or positional relationship shown in the accompanying drawings, and are only for the convenience of describing this utility model and simplifying the description, and are not intended to indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of this utility model.

[0017] In the description of this utility model, "several" means one or more, "multiple" means two or more, "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. If the terms "first," "second," and "third" are used in the description, they are for descriptive purposes and to distinguish technical features, and should not be construed as indicating or implying relative importance, or implicitly indicating the number of indicated technical features, or implicitly indicating the sequential relationship of the indicated technical features.

[0018] In the description of this utility model, it should be noted that, unless otherwise explicitly specified and limited, the terms "installation," "connection," "linking," and "setting" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal connection of two components. Those skilled in the art can understand the specific meaning of the above terms in this utility model based on the specific circumstances. The embodiments of this utility model will now be described based on its overall structure.

[0019] See Figure 1 , Figure 2 and Figure 3A packaging bag slitting device includes an unwinding mechanism 1, a web guiding mechanism 2, and a slitting mechanism 3. A tangent mechanism 4 is provided between the web guiding mechanism 2 and the slitting mechanism 3. The tangent mechanism 4 includes two guide rollers 41, the axes of which are located on the same horizontal line. An adjusting roller 42 is provided between the two guide rollers 41. The adjusting roller 42 and the guide rollers 41 are connected to a fixed plate 43. An adjusting component 44 is connected to the side of the fixed plate 43 and is connected to the adjusting roller 42. A bracket 45 is provided above the guide rollers 41, and a laser tangent component 46 is connected to the lower end of the bracket 45.

[0020] See Figure 1 The unwinding mechanism 1, the correction mechanism 2, and the slitting mechanism 3 in the packaging bag slitting device are all existing technologies. In the existing technology, a transmission roller 100 is provided between the correction mechanism 2 and the slitting mechanism 3.

[0021] See Figure 1 and Figure 6 In the prior art, the correction mechanism 2 and the cutting mechanism 3 are equipped with two transmission rollers 100. Figure 6 (a) is a schematic diagram of the movement of the composite plastic film 200 between the correction mechanism 2 and the slitting mechanism 3 in the prior art. After passing through the correction mechanism 2, the composite plastic film 200 passes through the lower end of the transmission roller 100 and enters the slitting mechanism 3.

[0022] See Figure 1 , Figure 3 and Figure 6 In this invention, a tangent mechanism 4 is installed in the space where the transmission roller 100 is located, the axes of the two guide rollers 41 are located on the same horizontal line, and the adjusting roller 42 is set between the two guide rollers 41. Figure 6 Figure (b) is a schematic diagram of the movement of the composite plastic film 200 between the correction mechanism 2 and the slitting mechanism 3 in this utility model. After passing through the correction mechanism 2, the composite plastic film 200 sequentially passes the upper end of the guide roller 41 near the correction mechanism 2, the lower end of the adjusting roller 42, and the upper end of the guide roller 41 near the slitting mechanism 3 before entering the slitting mechanism 3. The adjusting roller 42 is configured to adjust its vertical movement distance, thereby adjusting the tension of the composite plastic film 200.

[0023] The laser cutting assembly 46 is positioned above the guide roller 41 to perform laser perforation on the composite plastic film 200 on the guide roller 41, thereby achieving the processing of easy-tear lines.

[0024] See Figure 3The fixed plate 43 is provided with clearance holes 430, and both ends of the adjusting roller 42 can move within the clearance holes 43. Two fixed plates 43 are provided, positioned between the cutting mechanism 3 and the correction mechanism 2. The guide roller 41 and the adjusting roller 42 are positioned between the two fixed plates 43.

[0025] See Figure 3 , Figure 4 and Figure 5 The adjustment component 44 includes an elastic support plate 441, a fixed block 442 connected to the elastic support plate 441, a pushing component 443 connected to the top of the fixed block 442, and the end of the adjustment roller 42 passes through the fixed plate 43 and is connected to the fixed block 442, and the adjustment roller 42 is rotatable on the fixed block 442.

[0026] The elastic support plate 441 is connected to a spring 444 below it. The spring 444 is connected to the support block 445. The support block 445 is connected to the fixed plate 43 through a connecting plate 446.

[0027] For the adjusting roller 42, rigid support is required, that is, a stable and reliable support point is needed to maintain the constant tension of the composite plastic film 200. However, in order to respond to external commands, such as changing the roll material or adjusting process parameters, the adjusting roller 42 needs to be controllably movable in the vertical direction to adjust the tension of the composite plastic film 200. Therefore, the adjusting roller 42 needs to meet its displacement adjustment requirements while providing the stability of rigid support, and a spring can meet both of these requirements of the adjusting roller 42.

[0028] In this device, on the one hand, the adjusting roller 42 needs to move downward to adjust the tension of the composite plastic film 200 on it. At this time, the pushing component 443 pushes the fixing block 43. Since the spring 444 is connected to the fixing block 43, the spring 444 can be compressed when the fixing block 43 is pushed, thereby allowing the adjusting roller 42 to move downward, realizing the displacement adjustment of the adjusting roller 42 and satisfying the adjustable requirement of adjusting the tension of the composite plastic film 200. On the other hand, the spring 444 itself is elastic. Under normal conditions, it provides an upward supporting force to the adjusting roller 42, bears the weight of the adjusting roller 42 itself, and stably supports the adjusting roller 42 in one position, just like a rigid support, so that the adjusting roller 42 remains stable when no adjustment operation is performed, solving the problem of fixation.

[0029] Therefore, spring 444 plays a crucial balancing role in the device. It is not a simple rigid connection, but rather elastic, capable of deforming under the action of the pushing component 443 to adjust the displacement of the adjusting roller 42, and also providing stable support to ensure the fixing of the adjusting roller 42 when no external force is applied. This characteristic allows spring 444 to meet the displacement adjustment requirements of the adjusting roller 42 while providing stability for its operation, thus resolving the seemingly contradictory requirements of adjustability and fixation.

[0030] See Figure 3 , Figure 4 and Figure 5 The pushing component 443 includes a mounting plate 4431 connected to the fixed plate 43. A support plate 4432 is connected to the mounting plate 4431, and a pushing cylinder 4433 is connected to the lower end of the support plate 4432. The output end of the pushing cylinder 4433 is connected to the fixed block 442. A connecting block 448 with a connecting hole is provided on the upper end of the fixed block 442. The output end of the pushing cylinder 4433 is connected to the connecting hole on the connecting block 448.

[0031] See Figure 3 , Figure 4 and Figure 5 A bearing 447 is connected inside the fixed block 442, and the end of the adjusting roller 42 is connected inside the bearing 447. Both ends of the adjusting roller 42 are movable within the bearing 447. A bearing 447 is also provided on the fixed plate 43 to mount a guide roller 41, and both ends of the guide roller 41 are rotatable within the bearing 447.

[0032] In this embodiment, controlling the consistent stroke of the output piston rods of the two push cylinders 4433 can be achieved in various ways. For example, in pneumatic control, two solenoid valves can be used to control the two cylinders respectively, with the control lines of the two solenoid valves connected in parallel. When a control signal is issued, the two solenoid valves are simultaneously energized or de-energized, thereby achieving synchronous action of the two cylinders. Alternatively, the two cylinders can share a single solenoid valve, with a three-way valve installed at each inlet and outlet. The outlet of the solenoid valve is connected to the inlet of each cylinder via the three-way valve, and the outlet of each cylinder is also connected to the outlet of the solenoid valve via the three-way valve. Thus, when the solenoid valve is energized, compressed air enters both cylinders simultaneously, pushing the pistons to move synchronously; when the solenoid valve is de-energized, both cylinders exhaust air simultaneously, and the pistons retract synchronously. The above methods for controlling the consistent stroke of the output piston rods of the two push cylinders 4433 are existing technologies and can be implemented by those skilled in the art.

[0033] The foregoing description of specific exemplary embodiments of the present invention is for illustrative and explanatory purposes. These descriptions are not intended to limit the present invention to the precise forms disclosed, and it is obvious that many changes and variations can be made based on the above teachings. Although embodiments of the present invention have been shown and described, these specific embodiments are merely explanations of the present invention and are not intended to limit the invention. The specific features, structures, materials, or characteristics described may be combined in any suitable manner in one or more embodiments or examples. The purpose of selecting and describing exemplary embodiments is to explain the specific principles of the present invention and its practical application, so that those skilled in the art, after reading this specification, can make modifications, substitutions, variations, and various choices and changes to the embodiments as needed without departing from the principles and spirit of the present invention, provided that such modifications, substitutions, variations, and choices and changes are within the scope of the claims of the present invention and are protected by patent law.

Claims

1. A packaging bag slitting device, comprising an unwinding mechanism (1), a web guiding mechanism (2), and a slitting mechanism (3), characterized in that, A tangent mechanism (4) is provided between the correction mechanism (2) and the cutting mechanism (3). The tangent mechanism (4) includes two guide rollers (41), the axes of the two guide rollers (41) are located on the same horizontal line, and an adjusting roller (42) is provided between the two guide rollers (41). The adjusting roller (42) and the guide roller (41) are connected to a fixed plate (43). An adjusting component (44) is connected to the side of the fixed plate (43). The adjusting component (44) is connected to the adjusting roller (42). A bracket (45) is provided above the guide roller (41), and a laser tangent component (46) is connected to the lower end of the bracket (45).

2. The packaging bag cutting device according to claim 1, characterized in that, The fixed plate (43) is provided with a clearance hole (430), and both ends of the adjusting roller (42) can move within the clearance hole (430).

3. The packaging bag cutting device according to claim 1, characterized in that, The adjustment assembly (44) includes an elastic support plate (441), a fixed block (442) is connected to the elastic support plate (441), a pushing component (443) is connected to the top of the fixed block (442), the end of the adjustment roller (42) passes through the fixed plate (43) and is connected to the fixed block (442), and the adjustment roller (42) is rotatable on the fixed block (442).

4. The packaging bag cutting device according to claim 3, characterized in that, The pushing component (443) includes a mounting plate (4431) connected to the fixed plate (43), a support plate (4432) connected to the mounting plate (4431), a pushing cylinder (4433) connected to the lower end of the support plate (4432), and the output end of the pushing cylinder (4433) connected to the fixed block (442).

5. A packaging bag cutting device according to claim 3, characterized in that, A spring (444) is connected below the elastic support plate (441), and the spring (444) is connected to the support block (445). The support block (445) is connected to the fixed plate (43) through the connecting plate (446).

6. The packaging bag cutting device according to claim 3, characterized in that, The fixed block (442) is connected to a bearing (447), and the end of the adjusting roller (42) is connected to the bearing (447).

7. A packaging bag cutting device according to claim 3, characterized in that, The upper end of the fixing block (442) is provided with a connecting block (448), and the connecting block (448) is provided with a connecting hole.

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