A hot edge cutting knife mechanism

Abstract

The utility model discloses a kind of edge ironing cutting-off cutter mechanisms, including lower cutter, upper cutter, upper blade, lower knife rest, upper knife rest, lower knife rest lifting device and upper knife rest cylinder.The lower cutter and upper cutter are oppositely arranged, and heating element is provided in its inside, and lower cutter is driven to rise by lower knife rest lifting device, and it is compressed tightly with upper cutter together, realize hot-pressing fusion.Upper blade is driven by upper knife rest cylinder, and fused packaging bag is cut off.Upper cutter is provided with the recess of accommodating upper blade, and lower cutter is provided with the recess of protecting upper blade in corresponding position.The utility model integrates edge ironing sealing and cutting-off procedure, effectively improves packaging efficiency, ensures that sealing is firm, cutting surface is flat, reduces cutter wear at the same time, enhances the stability and durability of equipment operation, and is especially suitable for high-speed packaging production line.

Description

Technical Field

[0001] This utility model relates to the field of packaging machinery technology, specifically to a hot-stamping and cutting knife mechanism for packaging bags, which is particularly suitable for hot-stamping and cutting operations in the vegetable packaging process. Background Technology

[0002] In existing packaging machinery, the cutting mechanism typically employs a simple shearing method, which can lead to problems such as low cutting efficiency, uneven cut surfaces, and easy blade wear. Traditional mechanisms often produce burrs or insecure seals when cutting packaging bags, affecting packaging quality and appearance. Furthermore, frequent blade wear after repeated use necessitates frequent replacement, reducing production efficiency and equipment stability. Especially in vegetable packaging, where heat sealing and cutting are required simultaneously, traditional mechanisms struggle to balance high-speed operation and precise control, resulting in unsatisfactory packaging outcomes. Therefore, there is an urgent need for a mechanism that can improve the efficiency and precision of heat sealing and cutting, and extend blade life. Utility Model Content

[0003] This invention overcomes the shortcomings of existing technologies and provides a hot-stamping and cutting knife mechanism that improves the efficiency and accuracy of hot-stamping and cutting of packaging bags, ensures a flat and firm cut surface, reduces blade wear, and enhances the stability and durability of the equipment.

[0004] To solve the above-mentioned technical problems, the technical solution adopted by this utility model is as follows: a hot-edge cutting knife mechanism, including a lower cutting knife, an upper cutting knife, an upper blade, a lower knife holder, an upper knife holder, a lower knife holder lifting device, and an upper knife holder cylinder; the lower knife holder lifting device and the upper knife holder cylinder are both fixed on the body of the packaging machine; the lower end of the lower knife holder is fixedly installed on the lifting end of the upper part of the lower knife holder lifting device; the lower cutting knife is fixedly installed on the lower knife holder; the upper knife holder is installed on the body of the packaging machine, and the piston of the upper knife holder cylinder faces downwards. An upper cutter is fixedly installed after the rod end passes through the upper cutter holder; the lower cutter and the upper cutter are arranged opposite each other, and the packaging bag passes through the gap between them. Heating elements are installed in both the lower cutter and the upper cutter. The lower cutter and the upper cutter have a certain thickness. The lower cutter is lifted by the lower cutter holder lifting device and pressed tightly against the upper cutter. The lower cutter and the upper cutter, heated by the heating elements, will heat-press and fuse the packaging bag between them together; the upper blade cuts the heat-pressed and fused packaging bag under the push of the upper cutter holder cylinder.

[0005] Furthermore, the lower part of the upper cutter is provided with a first groove for accommodating the upper blade along the direction perpendicular to the running direction of the packaging bag. The upper end of the upper blade passes through the upper cutter and is connected to the piston rod end of the upper blade holder cylinder. Under the push of the upper blade holder cylinder, the upper blade can extend out of the first groove and cut the packaging bag.

[0006] Furthermore, the upper blade placed inside the upper cutter can be heated by a heating element, and the upper blade also has a heat-fusion effect when cutting the packaging bag.

[0007] Furthermore, a second groove is provided on the upper part of the lower cutter corresponding to the position of the first groove, so that the upper blade can extend into the second groove and protect the upper blade.

[0008] Furthermore, raised textures are provided on the opposing surfaces of the lower and upper cutters that can fit together. These raised textures are used to concentrate pressure and enhance the heat fusion effect.

[0009] Furthermore, a buffer device is provided between the upper blade holder and the body of the packaging machine, the buffer device being used to buffer the pressure of the lower cutter pressing against the upper cutter.

[0010] Furthermore, the structure of the buffer device includes a buffer fixing frame, a guide rod, a buffer spring, and a sliding sleeve. The upper end of the buffer fixing frame is fixed to the body of the packaging machine. Guide rods are vertically arranged at both ends of the lower side of the buffer fixing frame. A sliding sleeve is arranged at the upper end of the upper knife holder corresponding to the position of the guide rod. The sliding sleeve can be inserted into the guide rod. The buffer spring is fitted on the guide rod. The upper end of the buffer spring abuts against the lower side of the buffer fixing frame, and the lower end of the buffer spring presses against the upper side of the sliding sleeve.

[0011] Furthermore, at least one limiting plate is provided on the lower side of the buffer fixing frame, and the limiting plate is used to limit the upward buffer distance of the upper tool holder.

[0012] Furthermore, the structure of the lower knife holder lifting device includes: a guide rail, a slider, a connecting rod, a crank, a motor, a driving gear, a driven gear, and a fixed plate. The guide rail and the fixed plate are fixedly mounted on the body of the packaging machine. The slider is slidably mounted on the vertically mounted guide rail. The motor body is fixedly mounted on the fixed plate. The motor's power output end is provided with a driving gear. The driven gear is movably mounted on the fixed plate via a rotating shaft. The driven gear meshes with the driving gear. A crank is provided on the rotating shaft of the driven gear. The other end of the crank is connected to the lower end of the connecting rod. The upper end of the connecting rod is connected to the slider and the lower knife holder. The motor drives the lower knife holder to move up and down along the guide rail with the slider.

[0013] Furthermore, the heating element includes an electric heating tube and a heat-conducting tube.

[0014] The advantages of this invention compared to existing technologies are as follows: This invention heats the lower and upper cutters using heating elements, achieving thermal fusion during the pressing of the packaging bag. This ensures a firm and smooth seal, avoiding the burr problem of traditional cut surfaces. The upper blade also achieves thermal fusion during bag cutting, further improving the quality of the cut surface while reducing blade wear and extending tool life. The buffer device effectively mitigates the impact force during stamping, protecting mechanical components and improving equipment stability and durability. The lower blade holder lifting device uses a motor drive and crank-connecting rod structure, achieving smooth lifting movement and improving cutting accuracy and efficiency. The raised texture and groove design enhance the thermal fusion effect and blade protection, resulting in a reasonable overall structure suitable for high-speed packaging production lines. Attached Figure Description

[0015] The present invention will be further described below with reference to the accompanying drawings.

[0016] Figure 1 This is a schematic diagram of the structure of this utility model.

[0017] Figure 2 This is a side view of the present invention.

[0018] Figure 3 This is a three-dimensional schematic diagram of the present invention.

[0019] Figure 4 This is a schematic diagram of the connection structure of the upper tool holder of this utility model.

[0020] Figure 5 This is a schematic diagram of the connection structure of the blade in this utility model.

[0021] In the diagram: 1 is the lower cutter, 2 is the upper cutter, 3 is the upper blade, 4 is the lower tool holder, 5 is the upper tool holder, 6 is the lower tool holder lifting device, 61 is the guide rail, 62 is the slider, 63 is the connecting rod, 64 is the crank, 65 is the motor, 66 is the driving gear, 67 is the driven gear, 68 is the fixing plate, 7 is the upper tool holder cylinder, 8 is the heating element, 9 is the first groove, 10 is the second groove, 11 is the raised texture, 12 is the buffer device, 121 is the buffer fixing frame, 122 is the guide rod, 123 is the buffer spring, 124 is the sliding sleeve, and 125 is the limiting plate. Detailed Implementation

[0022] The present invention will be further described below with reference to specific embodiments.

[0023] like Figures 1-5As shown in the figure (the machine body of the packaging machine is not shown), this utility model discloses a hot-edge cutting knife mechanism, including a lower cutter 1, an upper cutter 2, an upper blade 3, a lower knife holder 4, an upper knife holder 5, a lower knife holder lifting device 6, and an upper knife holder cylinder 7. The lower knife holder lifting device 6 and the upper knife holder cylinder 7 are both fixed to the machine body of the packaging machine. The lower end of the lower knife holder 4 is fixedly installed at the lifting end of the lower knife holder lifting device 6. The structure of the lower knife holder lifting device 6 includes: a guide rail 61, a slider 62, a connecting rod 63, a crank 64, a motor 65, a driving gear 66, a driven gear 67, and a fixing plate 68. The guide rail 61 and the fixing plate 68 are fixedly installed. On the body of the packaging machine, the slider 62 is slidably mounted on the vertically arranged guide rail 61. The body of the motor 65 is fixedly mounted on the fixed plate 68. The power output end of the motor 65 is provided with a driving gear 66. The driven gear 67 is movably mounted on the fixed plate 68 through a rotating shaft. The driven gear 67 meshes with the driving gear 66. The rotating shaft of the driven gear 67 is provided with a crank 64. The other end of the crank 64 is connected to the lower end of the connecting rod 63. The upper end of the connecting rod 63 is connected to the slider 62 and the lower knife holder 4. The motor 65 drives the lower knife holder 4 to move up and down along the guide rail 61 with the slider 62.

[0024] The lower cutter 1 is fixedly mounted on the lower cutter holder 4; the upper cutter holder 5 is mounted on the body of the packaging machine, and the piston rod end of the upper cutter holder cylinder 7, facing downwards, passes through the upper cutter holder 5 and is fixedly mounted on the upper cutter 2; the lower cutter 1 and the upper cutter 2 are arranged opposite to each other, and the packaging bag passes through the gap between them. Both the lower cutter 1 and the upper cutter 2 are equipped with heating elements 8, which include electric heating tubes and heat conducting tubes. The lower cutter 1 and the upper cutter 2 have a certain thickness. The lower cutter 1 is lifted by the lower cutter holder lifting device 6 and pressed against the upper cutter 2. The lower cutter 1 and the upper cutter 2, heated by the heating elements 8, heat-press and fuse the packaging bag passing between them together; the upper blade 3, pushed by the upper cutter holder cylinder 7, cuts the heat-pressed and fused packaging bag.

[0025] The lower part of the upper cutter 2 has a first groove 9 arranged perpendicular to the direction of travel of the packaging bag to accommodate the upper blade 3. The upper end of the upper blade 3 passes through the upper cutter 2 and is connected to the piston rod end of the upper blade holder cylinder 7. Under the push of the upper blade holder cylinder 7, the upper blade 3 can extend out of the first groove 9 to cut the packaging bag. The upper part of the lower cutter 1 has a second groove 10 corresponding to the position of the first groove 9, which facilitates the upper blade 3 to extend into the second groove 10 and protects the upper blade 3. The upper blade 3 placed in the upper cutter 2 can be heated by the heating element 8. When cutting the packaging bag, the upper blade 3 also has a heat-sealing effect. The opposing surfaces of the lower cutter 1 and the upper cutter 2 that can be attached are provided with raised textures 11. The raised textures 11 are used to concentrate pressure and enhance the heat-sealing effect.

[0026] A buffer device 12 is provided between the upper blade holder 5 and the body of the packaging machine. The buffer device 12 is used to buffer the pressure of the lower cutter 1 pressing against the upper cutter 2. The structure of the buffer device 12 includes a buffer fixing frame 121, a guide rod 122, a buffer spring 123, and a sliding sleeve 124. The upper end of the buffer fixing frame 121 is fixed to the body of the packaging machine. Guide rods 122 are vertically arranged at both ends of the lower side of the buffer fixing frame 121. A sliding sleeve 124 is arranged at the upper end of the upper blade holder 5 corresponding to the position of the guide rod 122. The sliding sleeve 124 can be fitted into the guide rod 122. The buffer spring 123 is fitted on the guide rod 122. The upper end of the buffer spring 123 abuts against the lower side of the buffer fixing frame 121, and the lower end of the buffer spring 123 presses against the upper side of the sliding sleeve 124. At least one limiting plate 125 is provided on the lower side of the buffer fixing frame 121. The limiting plate 125 is used to limit the upward buffering distance of the upper blade holder 5.

[0027] In operation, the packaging bag passes through the gap between the lower cutter 1 and the upper cutter 2 along the running direction. First, the lower cutter holder lifting device 6 is activated. The motor 65 drives the crank 64 to rotate through the driving gear 66 and the driven gear 67, causing the connecting rod 63 and the slider 62 to rise along the guide rail 61, thereby pushing the lower cutter holder 4 and the lower cutter 1 upward to press the packaging bag against the upper cutter 2. At the same time, the heating element 8 heats the lower cutter 1 and the upper cutter 2, heat-pressing the packaging bag to fuse it together. Next, the upper cutter holder cylinder 7 is activated, pushing the upper blade 3 out of the first groove 9 to cut the fused packaging bag downward. The upper blade 3, due to the heating during the cutting process, also has a heat-sealing effect, ensuring a sealed cut surface. The buffer device 12, through the cooperation of the buffer spring 123 and the sliding sleeve 124, absorbs the pressure of the lower cutter 1 during the punching process, preventing damage to the mechanism. Throughout the process, the raised texture 11 concentrates pressure to enhance fusion, the second groove 10 protects the upper blade 3, and the limiting plate 125 restricts the buffer distance, thereby achieving efficient and precise edge cutting.

[0028] In practical applications, this invention allows for adjustment of the temperature of the heating element 8 and the lifting speed of the lower blade holder lifting device 6 according to the material and thickness of the packaging bag, achieving optimal edge-pressing results. The buffer spring 123 of the buffer device 12 can be selected with different stiffnesses to adapt to varying pressure requirements. The motor 65 of the lower blade holder lifting device 6 can be a servo motor to improve control precision. This invention features a compact structure, is easy to install and maintain, and is suitable for various types of packaging machinery.

[0029] The embodiments of the present invention have been described in detail above with reference to the accompanying drawings. However, the present invention is not limited to the above embodiments. Within the scope of knowledge possessed by those skilled in the art, various changes can be made without departing from the spirit of the present invention.

Claims

1. A hemming and cutting knife mechanism, characterized in that, The packaging machine includes a lower cutter (1), an upper cutter (2), an upper blade (3), a lower blade holder (4), an upper blade holder (5), a lower blade holder lifting device (6), and an upper blade holder cylinder (7). The lower blade holder lifting device (6) and the upper blade holder cylinder (7) are both fixed to the machine body. The lower end of the lower blade holder (4) is fixedly mounted on the lifting end of the lower blade holder lifting device (6). The lower cutter (1) is fixedly mounted on the lower blade holder (4). The upper blade holder (5) is mounted on the machine body. The piston rod end of the upper blade holder cylinder (7) passes through the upper blade holder (5) and is fixedly mounted with the upper cutter. 2); The lower cutter (1) and the upper cutter (2) are arranged opposite to each other, and the packaging bag passes through the gap between them. The lower cutter (1) and the upper cutter (2) are both equipped with heating elements (8). The lower cutter (1) and the upper cutter (2) have a certain thickness. The lower cutter (1) is lifted by the lower cutter holder lifting device (6) and pressed against the upper cutter (2). The lower cutter (1) and the upper cutter (2) heated by the heating elements (8) will heat-press and fuse the packaging bag passing between them together. The upper blade (3) is pushed by the upper cutter holder cylinder (7) to cut the packaging bag that has been heat-pressed and fused together.

2. A scorch-cutting knife mechanism according to claim 1, wherein The lower part of the upper cutter (2) is provided with a first groove (9) for accommodating the upper blade (3) along the direction perpendicular to the running direction of the packaging bag. The upper end of the upper blade (3) passes through the upper cutter (2) and is connected to the piston rod end of the upper blade holder cylinder (7). Under the push of the upper blade holder cylinder (7), the upper blade (3) can extend out of the first groove (9) and cut the packaging bag.

3. A hemming cut-off tool mechanism according to claim 2, wherein The upper blade (3) placed inside the upper cutter (2) can be heated by the heating element (8). The upper blade (3) also has a heat-fusion effect when cutting the packaging bag.

4. A scorch-cutting knife mechanism according to claim 2, wherein The upper part of the lower cutter (1) is provided with a second groove (10) corresponding to the position of the first groove (9), so that the upper blade (3) can be inserted into the second groove (10) to protect the upper blade (3).

5. A hot-edge cutting tool mechanism according to any one of claims 1 to 4, characterized in that, The lower cutter (1) and the upper cutter (2) are provided with raised textures (11) on their respective surfaces that can be fitted together. The raised textures (11) are used to concentrate pressure and enhance the heat fusion effect.

6. The edge-cutting tool mechanism according to claim 5, characterized in that, A buffer device (12) is provided between the upper blade holder (5) and the body of the packaging machine. The buffer device (12) is used to buffer the pressure of the lower cutter (1) pressing against the upper cutter (2).

7. The edge-cutting tool mechanism according to claim 6, characterized in that, The structure of the buffer device (12) is as follows: it includes a buffer fixing frame (121), a guide rod (122), a buffer spring (123), and a sliding sleeve (124). The upper end of the buffer fixing frame (121) is fixed on the body of the packaging machine. The guide rod (122) is vertically arranged at both ends of the lower side of the buffer fixing frame (121). The upper end of the upper knife holder (5) is provided with a sliding sleeve (124) corresponding to the position of the guide rod (122). The sliding sleeve (124) can be inserted into the guide rod (122). The buffer spring (123) is fitted on the guide rod (122). The upper end of the buffer spring (123) is against the lower side of the buffer fixing frame (121), and the lower end of the buffer spring (123) is pressed against the upper side of the sliding sleeve (124).

8. The edge-cutting tool mechanism according to claim 7, characterized in that, At least one limiting plate (125) is provided on the lower side of the buffer fixing frame (121), and the limiting plate (125) is used to limit the upward buffer distance of the upper tool holder (5).

9. The edge-cutting tool mechanism according to claim 1, characterized in that, The structure of the lower blade holder lifting device (6) includes: a guide rail (61), a slider (62), a connecting rod (63), a crank (64), a motor (65), a driving gear (66), a driven gear (67), and a fixed plate (68). The guide rail (61) and the fixed plate (68) are fixedly mounted on the body of the packaging machine. The slider (62) is slidably mounted on the vertically mounted guide rail (61). The motor (65) is fixedly mounted on the fixed plate (68). The power output end of the motor (65) is... The driven tooth (66) is provided, and the driven tooth (67) is movably mounted on the fixed plate (68) via a rotating shaft. The driven tooth (67) meshes with the driven tooth (66). A crank (64) is provided on the rotating shaft of the driven tooth (67). The other end of the crank (64) is connected to the lower end of the connecting rod (63). The upper end of the connecting rod (63) is connected to the slider (62) and the lower tool holder (4). The lower tool holder (4) is driven by the motor (65) to move up and down along the guide rail (61) with the slider (62).

10. The edge-cutting tool mechanism according to claim 1, characterized in that, The heating element (8) includes an electric heating tube and a heat-conducting tube.

Images