A plastic packaging film pre-cutting device and a pre-cut plastic packaging film

Abstract

The utility model discloses a kind of plastic envelope film pre-cutting device and pre-cut plastic envelope film, and the device includes: cutting knife, cutting knife is used to carry out the incomplete cutting of plastic envelope film in advance;Adjusting rod, adjusting rod adjusting precision is microns, adjusting rod is used to adjust the position of cutting knife pre-cutting, ensure cutting while avoiding plastic envelope film is completely cut off;Control frame, adjusting rod is installed on control frame, for controlling the cutting work of adjusting rod driven cutting knife;Positioning device, positioning device is installed on operation table, for the position of plastic envelope film needing pre-treatment is fixed;By using the accurate adjustment pneumatic sliding table and laser ranging sensor, the accurate adjustment of cutting knife pre-cutting position and the accurate control of cutting depth are realized.Compared with prior art, this design significantly improves cutting accuracy, avoids the problem that plastic envelope film is completely cut off or not cut in place due to inaccurate cutting, thereby ensuring the integrity of packaging.

Description

Technical Field

[0001] This utility model relates to the field of directional packaging breaking technology of plastic sealant, specifically a plastic sealant pre-cutting device and a pre-cut plastic sealant. Background Technology

[0002] In traditional plastic wrap packaging, a pre-cut opening is often made in the plastic wrap to facilitate opening for users. Traditional methods typically involve cutting the plastic wrap manually or with a mechanical blade; however, these methods have several drawbacks. Manual cutting has lower precision, easily causing packaging damage or uneven cuts; while mechanical blade cutting may result in cuts that are too deep or too shallow due to inconvenient adjustment, affecting the packaging's appearance and usability. Furthermore, current techniques often use tear strips to assist in breaking the plastic wrap, usually resulting in a horizontal tear, leaving a significant portion of the plastic wrap still on the surface of the package after the tear is made, making it difficult to remove.

[0003] Therefore, this application provides a plastic sealant pre-cutting device and a pre-cut plastic sealant to solve the above-mentioned technical problems. Utility Model Content

[0004] Purpose of the utility model: To solve the problems existing in the prior art described in the background section.

[0005] To achieve the above objectives, this utility model provides the following technical solution: A pre-cutting device for plastic sealing film, comprising: A cutting blade, used for pre-cutting an incomplete portion of the plastic sealant film; An adjusting rod, the adjusting rod having an adjustment accuracy of micrometers, is used to adjust the pre-cutting position of the cutting blade to ensure that the plastic sealant is not completely cut off during the cutting process; A control frame, wherein the adjusting rod is mounted on the control frame and is used to control the cutting operation of the cutting blade driven by the adjusting rod; A positioning device is installed on the operating table to fix the position of the plastic sealing film that needs to be pre-treated.

[0006] Furthermore, the cutting blade is a cutting blade with an inclined blade surface, wherein the blade surface of the cutting blade is inclined in the direction of movement.

[0007] Furthermore, the adjusting rod adopts a precision-adjustable pneumatic slide, which is equipped with a high-precision pressure sensor for precise control of air pressure, thereby achieving micron-level displacement adjustment. The pneumatic slide is also equipped with a laser rangefinder for real-time detection of the distance between the cutting blade tip and the surface of the plastic sealant. Based on the distance value detected by the laser rangefinder, the control system precisely controls the displacement of the adjusting rod and adjusts the distance between the cutting blade tip and the surface of the plastic sealant, thereby achieving precise control of the cutting depth.

[0008] Furthermore, the control frame spans both sides of the workbench, and the control frame is equipped with guide rails, guide rods, and sliders. The guide rods are mounted on the guide rails, and the sliders are mounted on the guide rods, allowing the sliders to slide linearly and controllably on the guide rods.

[0009] Furthermore, the positioning device includes a clamping plate and bolts. The clamping plate is fixed to the operating table by bolts, and an anti-slip pad is provided on the bottom surface of the clamping plate.

[0010] A pre-cut plastic sealant film is prepared by pre-treating the plastic sealant film using the aforementioned plastic sealant film pre-cutting device. The surface of the pre-treated plastic sealant film includes a tear-off slit and a beveled cut. The tear-off slit is located on the side of the plastic sealant film and intersects with the beveled cut.

[0011] Compared with the prior art, the beneficial effects of this utility model are: By employing a beveled cutting blade, a precision-adjustable pneumatic slide, and control frames spanning both sides of the worktable, higher cutting precision and more stable positioning are achieved. The application of a laser rangefinder enables precise control of the cutting depth, avoiding over- or under-cutting. Furthermore, this patent offers the following benefits: improved pre-processing efficiency and reduced labor costs; ensured neat and aesthetically pleasing pre-cut edges, enhancing packaging quality; reduced blade wear, extending equipment lifespan; and the beveled cutting edge ensures more thorough removal of the plastic sealant, facilitating consumer use. Attached Figure Description

[0012] Figure 1 This is a schematic diagram of the structure of this utility model; Figure 2 This is a schematic diagram of the cut plastic sealant film in this utility model.

[0013] In the diagram: 1. Cutting blade; 2. Adjusting rod; 3. Control frame; 4. Height sensor; 501. Guide rail; 502. Guide rod; 601. Clamping plate; 602. Bolt; 7. Plastic sealing film; 8. Tear-off blade; 9. Beveled blade. Detailed Implementation

[0014] In the following description, numerous specific details are set forth in order to provide a more thorough understanding of the present invention. However, it will be apparent to those skilled in the art that the present invention can be practiced without one or more of these details. In other instances, certain technical features well-known in the art have not been described in order to avoid confusion with the present invention.

[0015] like Figure 1-2As shown, the pre-cutting device for plastic wrapping film in this embodiment includes: a cutting blade 1, used for pre-cutting the plastic wrapping film incompletely; an adjusting rod 2, with an adjustment precision of micrometers, used to adjust the pre-cutting position of the cutting blade 1, ensuring that the plastic wrapping film is not completely severed during cutting; a control frame 3, on which the adjusting rod 2 is mounted, used to control the cutting operation of the cutting blade 1; and a positioning device, mounted on the operating table, used to fix the position of the plastic wrapping film to be pre-treated. By using the micrometer-precision adjusting rod 2, the precise adjustment of the pre-cutting position of the cutting blade 1 is achieved. Compared with the prior art, this design significantly improves the cutting accuracy, avoids the problem of the plastic wrapping film being completely severed or not cut properly due to inaccurate cutting, thereby ensuring the integrity of the packaging.

[0016] In this embodiment of the pre-cutting device for plastic sealant film, the cutting blade 1 is an inclined blade with the blade surface tilted in the direction of movement. The inclined blade surface makes the cutting process smoother, reduces cutting resistance, and lowers the risk of damage to the plastic sealant film during cutting. Simultaneously, this design allows the cutting blade 1 to achieve better cutting performance in the direction of movement, further improving the cutting quality.

[0017] In this embodiment of the pre-cutting device for plastic sealant film, the adjusting rod 2 is a precisely adjustable pneumatic slide. A high-precision pressure sensor is installed on the pneumatic slide to accurately control the air pressure, thereby achieving micron-level displacement adjustment. A laser rangefinder 4 is also installed on the pneumatic slide to detect the distance between the cutting blade 1 tip and the surface of the plastic sealant film in real time. Based on the feedback from the laser rangefinder, the control system precisely controls the displacement of the adjusting rod, thereby achieving precise control of the cutting depth.

[0018] The control logic execution process of the control system is as follows: After the device is started, the laser range sensor 4 first performs an initial distance measurement on the surface of the plastic sealant and transmits the initial distance data to the control system. The control system, in conjunction with the preset target cutting depth (such as 1 / 2 to 2 / 3 of the thickness of the plastic sealant to avoid complete cutting), calculates the "target blade tip-plastic sealant distance" and stores it as a threshold. Before cutting begins, a high-precision pressure sensor detects the initial air pressure of the pneumatic slide. If the air pressure is not within the preset threshold range, the control system outputs a pressure adjustment command to the pneumatic control module until the air pressure stabilizes within the threshold. During the cutting process, the laser rangefinder 4 collects 10-20 sets of distance data per second and transmits them to the control system in real time. The central processing unit compares each set of data with the target threshold. When the detection distance is greater than the target threshold, a "downward displacement" command is output. The pneumatic slide increases the air intake, driving the adjustment rod 2 to move the cutting blade 1 downward. The displacement is calculated based on the distance difference (e.g., if the difference is 5 micrometers, the displacement is 5 micrometers). When the detection distance is less than the target threshold, the "upward displacement" command is output, the pneumatic slide reduces the air intake, and the driving adjustment rod 2 drives the cutting blade 1 to move upward. When the deviation between the detection distance and the target threshold is less than 0.5 micrometers, the control system triggers "displacement locking" to maintain the current position of the adjustment rod and ensure stable cutting depth.

[0019] In this embodiment of the pre-cutting device for plastic wrapping film, the control frame 3 is straddling both sides of the workbench. The control frame 3 is equipped with a guide rail 501, a guide rod 502, and a slider. The guide rod 502 is mounted on the guide rail 501, and the slider is mounted on the guide rod 502. The slider can slide linearly and controllably on the guide rod 502. The control system executes the control logic of the control frame as follows: the user inputs the parameters of the bevel cutting edge (such as a length of 10cm and an angle of 30° with the side of the plastic wrapping film) through the operation panel. The control system converts the parameters into motion parameters of the guide rail 501 and the guide rod 502 (such as the speed of the guide rail drive motor and the speed of the guide rod drive motor), driving the slider to slide along the guide rail and the guide rod. At the same time, the motor encoder provides real-time feedback on the position coordinates of the slider. The control system corrects the motor speed based on the coordinate data. For example, when the slider approaches the end point of the cutting edge, the motor speed is reduced to avoid cutting errors caused by inertia and to ensure the dimensional and angular accuracy of the bevel cutting edge.

[0020] The plastic wrapping device of this embodiment includes a positioning device comprising a clamping plate 601 and a bolt 602. The clamping plate 601 is fixed to the operating table by the bolt 602, and an anti-slip pad is provided on the bottom surface of the clamping plate 601. The structure of the clamping plate 601 and the bolt 602 in the positioning device, together with the use of the anti-slip pad, effectively fixes the position of the plastic wrapping film 7 that needs to be pre-treated, improves the accuracy of positioning, and further ensures the cutting quality and efficiency.

[0021] A pre-cut plastic sealant is prepared by pre-treating the plastic sealant using the aforementioned plastic sealant pre-cutting device. The surface of the pre-treated plastic sealant 7 includes a tear-off slit and a beveled cut 9. The tear-off slit is located on the side of the plastic sealant 7 and intersects with the beveled cut 9.

[0022] Working principle: When using this device, the pre-treated plastic film is first fixed on the worktable using the clamping plate 601. Then, the cutting blade 1 is installed. After starting the device, the control system first completes initialization: the laser range sensor 4 collects the initial distance, the high-precision pressure sensor calibrates the air pressure, and the slider of the control frame 3 returns to the origin. Subsequently, the user inputs the cutting parameters (diagonal cutting edge length, angle, and cutting depth), and the control system generates control commands. On the one hand, it controls the guide rail 501 and guide rod 502 of the control frame 3 to drive the slider to move, thereby moving the adjusting rod 2 and the cutting blade 1 along the preset path. On the other hand, through the real-time feedback from the laser range sensor 4 and the high-precision pressure sensor, the displacement of the adjusting rod 2 is adjusted in a closed loop to ensure that the cutting depth always meets the preset requirements. Finally, two parallel and inclined diagonal cutting edges 9 are formed on the surface of the plastic film, and a tearing slit is opened on the side that intersects with the diagonal cutting edges for easy tearing later.

[0023] It will be apparent to those skilled in the art that this invention is not limited to the details of the exemplary embodiments described above, and that it can be implemented in other specific forms without departing from the spirit or essential characteristics of this invention. Therefore, the embodiments should be considered illustrative and non-limiting in all respects, and the scope of this invention is defined by the appended claims rather than the foregoing description. Thus, it is intended that all variations falling within the meaning and scope of equivalents of the claims be included within this invention. No reference numerals in the claims should be construed as limiting the scope of the claims.

Claims

1. A pre-cutting device for plastic sealing film, characterized in that, include: A cutting blade, used for pre-cutting an incomplete portion of the plastic sealant film; An adjusting rod, the adjusting rod having an adjustment accuracy of micrometers, is used to adjust the pre-cutting position of the cutting blade to ensure that the plastic sealant is not completely cut off during the cutting process; A control frame, wherein the adjusting rod is mounted on the control frame and is used to control the cutting operation of the cutting blade driven by the adjusting rod; A positioning device is installed on the operating table to fix the position of the plastic sealing film that needs to be pre-treated.

2. The pre-cutting device for plastic sealing film according to claim 1, characterized in that, The cutting blade is a slanted blade, with the blade surface inclined in the direction of movement.

3. The pre-cutting device for plastic sealing film according to claim 1, characterized in that, The adjusting rod employs a precision-adjustable pneumatic slide. A high-precision pressure sensor is installed on the pneumatic slide to accurately control the air pressure, thereby achieving micron-level displacement adjustment. A laser rangefinder is also installed on the pneumatic slide to detect the distance between the cutting blade tip and the surface of the plastic sealant in real time. Based on the distance value detected by the laser rangefinder, the control system precisely controls the displacement of the adjusting rod and adjusts the distance between the cutting blade tip and the surface of the plastic sealant, thereby achieving precise control of the cutting depth.

4. The pre-cutting device for plastic sealing film according to claim 1, characterized in that, The control frame spans both sides of the workbench. The control frame is equipped with guide rails, guide rods, and sliders. The guide rods are mounted on the guide rails, and the sliders are mounted on the guide rods. The sliders can slide linearly and controllably on the guide rods.

5. The pre-cutting device for plastic sealing film according to claim 1, characterized in that, The positioning device includes a clamping plate and bolts. The clamping plate is fixed to the operating table by bolts, and the bottom surface of the clamping plate is provided with an anti-slip pad.

6. A pre-cut plastic sealant, characterized in that, The plastic sealant is pre-treated using a pre-cutting device according to any one of claims 1-5. The surface of the pre-treated plastic sealant includes a tear-off slit and a beveled cut. The tear-off slit is located on the side of the plastic sealant and intersects with the beveled cut.

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