Cutting device of heat preservation bag making machine

Abstract

The utility model relates to the technical field of bag making machines, in particular to a cutting device of a heat preservation bag making machine, which comprises a frame body, support legs, a base plate and a cutting mechanism, the support legs are arranged at the bottom of the frame body, the base plate is fixedly connected onto the frame body, a cutting seam is arranged on the base plate, the cutting mechanism comprises a fixing plate, a hydraulic machine and a cutter, the fixing plate is fixed on the frame body, and the hydraulic machine is fixed on the fixing plate. The cutting knife is slidably connected with the frame body through a first sliding groove formed in the frame body, the hydraulic machine is arranged on the fixing plate and is in transmission connection with the cutting knife, a fixing strip is arranged on the cutting knife, a spring groove is formed in the fixing strip, a first connecting strip is slidably connected into the spring groove, a spring is further arranged in the spring groove, and a pressing plate is arranged on the first connecting strip. The pressing plate is arranged on the cutting knife, when the cutting knife makes contact with the heat preservation bag, the pressing plate can press the two sides of the stressed portion of the heat preservation bag on the base plate so that the heat preservation bag can be tightened, and the situation that the cutting knife cannot effectively complete cutting work due to the fact that the knife edge of the cutting knife becomes blunt or the heat preservation bag is sunken is avoided.

Description

Technical Field

[0001] The present application relates to the technical field of bag making machines, and in particular to a cutting device for a thermal insulation bag making machine. Background Art

[0002] Insulation bags are packaging bags used to hold various foods and keep the food temperature and fresh. Insulation bags are produced by bag making machines. Bag making machines are machines that make various plastic packaging bags or other material packaging bags. Their processing range is plastic or other material packaging bags of various sizes, thicknesses and specifications. Generally speaking, plastic packaging bags are the main products.

[0003] At present, the Chinese utility model patent application with the publication date of May 03, 2024 and the publication number of CN220883575U provides a cross-cutting device of a heat preservation bag making machine, including a cross-cutting device and a limiting mechanism, wherein the limiting mechanism includes a fixed groove, an electric bidirectional screw, a limiting plate, a limiting block and a limiting groove, and a bearing on one side of the surface of the cross-cutting device is connected to a pressure roller, and one end of the pressure roller is connected to a first drive motor. The cross-cutting device of the heat preservation bag making machine is provided with a fixed groove, an electric bidirectional screw, a limiting plate, a limiting block and a limiting groove. When in use, the limiting plates at both ends can be driven by the electric bidirectional screw to move simultaneously, so that the limiting plate can maintain stable sliding at one end of the limiting groove through the limiting block. When the heat preservation bag is transmitted to one end of the cross-cutting device, the two sides of the heat preservation bag are fitted by the movement of the limiting plate, so that the heat preservation bag can be transmitted and moved along one side of the limiting plate, and the limiting plate can ensure that the heat preservation bag remains straight when moving.

[0004] A cross-cutting device of an insulation bag making machine in the related technology, since the insulation bag is made of soft material and has a certain elasticity, when the cutting knife cuts the insulation bag, the part of the insulation bag that contacts the cutting knife may be concave in the direction of force due to the blunt edge of the cutting knife after long-term use or the high strength of the insulation bag material making it difficult to cut. The cutting knife cannot effectively cut the insulation bag, affecting the normal operation of the cross-cutting device. Utility Model Content

[0005] The embodiment of the present application provides a cutting device for an insulation bag making machine, which can improve the technical problem in the related art that when the cutting knife cuts the insulation bag, the part of the insulation bag that contacts the cutting knife is recessed in the direction of the force, and the cutting knife cannot effectively cut the insulation bag.

[0006] The embodiment of the present application provides a cutting device for a heat preservation bag making machine, comprising: a frame, a support leg, a pad and a cutting mechanism, the support leg is arranged at the bottom of the frame, both ends of the pad are fixedly connected to the frame, a cutting slit is provided on the pad, the cutting mechanism comprises a fixed plate, a hydraulic press and a cutting knife, both ends of the fixed plate are fixedly connected to the frame, a first slide groove is provided on the frame, both ends of the cutting knife are slidably connected to the frame through the first slide groove, the hydraulic press is arranged on the fixed plate, the output end of the hydraulic press passes through the fixed plate and is transmission-connected to the cutting knife, both sides of the cutting knife are provided with a fixing strip, a plurality of spring grooves are provided inside the fixing strip, a first connecting strip is slidably connected in the spring groove, a spring is also arranged in the spring groove, one end of the spring abuts against the top of the spring groove, the other end of the spring abuts against one end of the first connecting strip, a pressing plate is provided at the end of the first connecting strip away from the spring, and a side of the pressing plate away from the first connecting strip is flush with the blade of the cutting knife.

[0007] The above-mentioned technical scheme in the embodiment of the present application has at least the following technical effects: the insulation bag is transported to the cutting mechanism through the pad under the power of the front part of the bag making machine cutting device, and the insulation bag is controlled to move forward or stop by the front part, and the operation of the cutting mechanism is synchronized with it; when the insulation bag stops, the cutting mark reserved on the insulation bag stops at the position of the cutting seam, and the cutting knife moves downward under the drive of the hydraulic press, and the blade of the cutting knife and the pressure plate touch the insulation bag at the same time, and then the cutting knife continues to move downward, and the pressure plate applies pressure to the insulation bag to press it tightly against the pad, and the spring contracts under the pressure of the first connecting strip, and at this time the cutting knife continues to move downward, because the two sides of the cutting mark of the insulation bag are pressed tightly against the pad by the pressure plate, the insulation bag remains taut and is cut by the cutting knife, and then the cutting knife moves up and returns to the initial position under the drive of the hydraulic press, avoiding the phenomenon that the cutting knife cannot effectively complete the cutting work due to the blunting of the cutting knife edge or the depression of the part of the insulation bag that contacts the cutting knife.

[0008] An insulation bag making machine cutting device provided in an embodiment of the present application is provided with a pressure plate on the cutting knife. When the cutting knife contacts the insulation bag, the pressure plate will press both sides of the stress-bearing part of the insulation bag onto the pad to make the insulation bag tight, thereby preventing the cutting knife from being unable to effectively complete the cutting work due to blunting of the cutting knife edge or depression of the insulation bag.

[0009] In some embodiments, a non-slip pad is provided on a side of the pressing plate away from the first connecting strip.

[0010] In some embodiments, a limiting mechanism is provided on the pad, and the limiting mechanism includes a left limiting plate, a right limiting plate, a second connecting strip, a left threaded plate, a right threaded plate and a bidirectional screw rod. A second sliding groove is provided on the pad, and the second connecting strip is slidably connected inside the second sliding groove. One end of the second connecting strip is fixedly connected to the right limiting plate, and the other end of the second connecting strip is fixedly connected to the right threaded plate. Threaded holes are provided on the left threaded plate and the right threaded plate, one end of the bidirectional screw rod is threadedly connected to the left threaded plate through the threaded hole, and the other end of the bidirectional screw rod is threadedly connected to the right threaded plate through the threaded hole, and both ends of the bidirectional screw rod are rotatably connected to the frame body.

[0011] In some embodiments, a handle is provided at one end of the bidirectional screw away from the left threaded plate.

[0012] In some embodiments, a third sliding groove is opened on the pad, and a third connecting strip is slidably connected inside the third sliding groove. One end of the third connecting strip is fixedly connected to the right limiting plate, and the other end of the third connecting strip is fixedly connected to the right threaded plate. An optical axis is arranged on the frame, and the optical axis passes through the left threaded plate and the right threaded plate, and the left threaded plate and the right threaded plate are both slidably connected to the optical axis.

[0013] In some embodiments, the left limiting plate and the right limiting plate are both rotatably connected to a plurality of limiting wheels.

[0014] In some embodiments, a conveying mechanism is also provided on the frame, and the conveying mechanism includes a conveyor belt, a drive roller, a driven roller and a motor. The drive roller and the driven roller are rotatably connected to the frame, the conveyor belt is sleeved on the drive roller and the driven roller, the motor is arranged at the bottom of the frame, and a second drive wheel is sleeved on the output end of the motor. One end of the drive roller is sleeved on the first drive wheel, and the first drive wheel is connected to the second drive wheel through a transmission belt. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] In order to more clearly illustrate the technical solutions in the embodiments of the present application, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present application. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative labor.

[0016] Figure 1 A schematic diagram of the overall structure of a cutting device for a heat preservation bag making machine provided in an embodiment of the present application;

[0017] Figure 2 A bottom view of a cutting device of a heat preservation bag making machine provided in an embodiment of the present application;

[0018] Figure 3 for Figure 2 A magnified view of part A;

[0019] Figure 4 for Figure 2 A magnified view of part B;

[0020] Figure 5 A cross-sectional view of a cutting device of a thermal insulation bag making machine provided in an embodiment of the present application;

[0021] Figure 6 for Figure 5 A magnified view of part A;

[0022] Figure 7 for Figure 5 Enlarged view of part B.

[0023] Among them, the reference numerals in the figure are:

[0024] 1. Frame; 11. First slide; 12. Optical axis; 2. Leg; 3. Pad; 31. Cutting slit; 32. Second slide; 33. Third slide; 41. Fixing plate; 42. Hydraulic press; 43. Cutting knife; 44. Fixing bar; 441. Spring slot; 442. First connecting bar; 443. Spring; 45. Pressing plate; 451. Anti-skid pad; 51. Left limit plate; 511. Limiting wheel; 52. Right limit plate; 53. Second connecting bar; 54. Left threaded plate; 55. Right threaded plate; 56. Bidirectional screw; 561. Handle; 57. Third connecting bar; 61. Conveyor belt; 62. Transmission roller; 621. First transmission wheel; 63. Driven roller; 64. Motor; 641. Second transmission wheel. DETAILED DESCRIPTION

[0025] In order to make the technical problems, technical solutions and beneficial effects to be solved by the present application more clearly understood, the present application is further described in detail below in conjunction with the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are only used to explain the present application and are not used to limit the present application.

[0026] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as those commonly understood by those skilled in the art to which this application belongs; the terms used herein are only for the purpose of describing specific embodiments and are not intended to limit this application. The terms "including" and "having" and any variations thereof in the specification and claims of this application and the above-mentioned figure descriptions are intended to cover non-exclusive inclusions.

[0027] It should be noted that when an element is referred to as being "fixed to" or "disposed on" another element, it can be directly on the other element or indirectly on the other element. When an element is referred to as being "connected to" another element, it can be directly connected to the other element or indirectly connected to the other element.

[0028] It should be understood that the terms "length", "width", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", etc., indicating the orientation or position relationship, are based on the orientation or position relationship shown in the drawings, and are only for the convenience of describing the present application and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be understood as a limitation on the present application.

[0029] In addition, the terms "first" and "second" are used for descriptive purposes only and should not be understood as indicating or implying relative importance or implicitly indicating the number of the indicated technical features. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of the features. In the description of this application, the meaning of "plurality" is two or more, unless otherwise clearly and specifically defined.

[0030] In this application, "and / or" is only a description of the association relationship of associated objects, indicating that there can be three relationships; for example, A and / or B can represent: A exists alone, A and B exist at the same time, and B exists alone. In addition, the character " / " in this article generally indicates that the associated objects before and after are in an "or" relationship.

[0031] It should be noted that, in the present application, words such as "in some embodiments", "exemplarily", "for example", etc. are used to indicate examples, illustrations or descriptions. Any embodiment or design described in the present application as "in some embodiments", "exemplarily", "for example" should not be interpreted as being more preferred or more advantageous than other embodiments or designs. Specifically, the use of words such as "in some embodiments", "exemplarily", "for example", etc. is intended to present related concepts in a concrete way, meaning that specific features, structures or characteristics described in conjunction with the embodiments may be included in at least one embodiment of the present application. The appearance of the above words in various locations in the specification does not necessarily refer to the same embodiment, nor is it an independent or alternative embodiment that is mutually exclusive with other embodiments. It is explicitly and implicitly understood by those skilled in the art that the embodiments described herein may be combined with other embodiments.

[0032] Insulation bags are packaging bags used to hold various foods and keep the food temperature and fresh. Insulation bags are produced by bag making machines. Bag making machines are machines that make various plastic packaging bags or other material packaging bags. Their processing range is plastic or other material packaging bags of various sizes, thicknesses and specifications. Generally speaking, plastic packaging bags are the main products.

[0033] A cross-cutting device of a heat preservation bag making machine in the related art, with publication number CN220883575U, comprises a cross-cutting device and a limiting mechanism, wherein the limiting mechanism comprises a fixed groove, an electric bidirectional screw, a limiting plate, a limiting block and a limiting groove, a surface side bearing of the cross-cutting device is connected with a pressure roller, and one end of the pressure roller is connected with a first driving motor. The cross-cutting device of the heat preservation bag making machine is provided with a fixed groove, an electric bidirectional screw, a limiting plate, a limiting block and a limiting groove. When in use, the limiting plates at both ends can be driven by the electric bidirectional screw to move simultaneously, so that the limiting plates can maintain stable sliding at one end of the limiting groove through the limiting block. When the heat preservation bag is transmitted to one end of the cross-cutting device, the two sides of the heat preservation bag are fitted by the movement of the limiting plate, so that the heat preservation bag can be transmitted and moved along one side of the limiting plate, and the limiting plate can ensure that the heat preservation bag maintains a straight line when moving.

[0034] However, the insulation bag is made of soft material and has a certain degree of elasticity. When the cutting knife cuts the insulation bag, the part where the insulation bag contacts the cutting knife may be concave in the direction of force due to the blunt blade of the cutting knife after long-term use or the high strength of the insulation bag material making it difficult to cut. The cutting knife cannot effectively cut the insulation bag, affecting the normal operation of the cross-cutting device.

[0035] Based on this, in order to improve the problems in the related art, the embodiments of the present application provide the following solutions.

[0036] Please also read Figures 1 to 6The embodiment of the present application provides a cutting device for a heat preservation bag making machine, including a frame 1, a leg 2, a pad 3 and a cutting mechanism, wherein the leg 2 is arranged at the bottom of the frame 1, both ends of the pad 3 are fixedly connected to the frame 1, a cutting slit 31 is provided on the pad 3, and the cutting mechanism includes a fixed plate 41, a hydraulic press 42 and a cutting knife 43, both ends of the fixed plate 41 are fixedly connected to the frame 1, a first slide groove 11 is provided on the frame 1, and both ends of the cutting knife 43 are slidably connected to the frame 1 through the first slide groove 11, the hydraulic press 42 is arranged on the fixed plate 41, and the output end of the hydraulic press 42 passes through the fixed plate 41. The fixing plate 41 is transmission-connected with the cutting knife 43, and fixing strips 44 are provided on both sides of the cutting knife 43. A plurality of spring grooves 441 are provided inside the fixing strip 44, and a first connecting strip 442 is slidingly connected in the spring groove 441. A spring 443 is also provided in the spring groove 441, and one end of the spring 443 abuts against the top of the spring groove 441, and the other end of the spring 443 abuts against one end of the first connecting strip 442. A pressing plate 45 is provided at one end of the first connecting strip 442 away from the spring 443, and a side of the pressing plate 45 away from the first connecting strip 442 is flush with the blade of the cutting knife 43.

[0037] As can be seen from the above, in the embodiment of the present application, a cutting device for a heat preservation bag making machine is provided. The heat preservation bag is transported to the cutting mechanism through the pad 3 under the power of the front part of the cutting device of the bag making machine. The heat preservation bag is controlled to move forward or stop by the front part, and the operation of the cutting mechanism is synchronized with it. When the heat preservation bag stops, the cutting mark reserved on the heat preservation bag stops at the position of the cutting seam 31, and the cutting knife 43 moves downward under the drive of the hydraulic press 42. The blade of the cutting knife 43 and the pressing plate 45 touch the heat preservation bag at the same time, and then the cutting knife 43 continues to move downward. The pressure plate 45 applies pressure to the insulation bag to press it tightly against the pad 3, and the spring 443 contracts under the pressure of the first connecting strip 442. At this time, the cutting knife 43 continues to move downward. Since the two sides of the cutting mark of the insulation bag are pressed tightly against the pad 3 by the pressure plate 45, the insulation bag remains taut and is cut by the cutting knife 43. Subsequently, the cutting knife 43 moves upward and returns to the initial position under the drive of the hydraulic press 42, avoiding the phenomenon that the cutting knife 43 cannot effectively complete the cutting work due to the blunting of the cutting knife 43 or the depression of the contact part between the insulation bag and the cutting knife 43.

[0038] In some embodiments, please refer to Figures 1 to 6 A non-slip pad 451 is provided on a side of the pressing plate 45 away from the first connecting strip 442 .

[0039] With such arrangement, the anti-skid pad 451 can increase the friction between the pressing plate 45 and the insulation bag, thereby preventing the insulation bag from sliding relative to the pressing plate 45 when the cutting knife 43 is cutting the insulation bag, thereby preventing the cutting knife 43 from effectively cutting the insulation bag.

[0040] Optionally, in some embodiments, see Figures 1 to 7A limiting mechanism is provided on the pad 3, and the limiting mechanism includes a left limiting plate 51, a right limiting plate 52, a second connecting strip 53, a left threaded plate 54, a right threaded plate 55 and a bidirectional screw rod 56. A second slide groove 32 is provided on the pad 3, and the second connecting strip 53 is slidably connected inside the second slide groove 32. One end of the second connecting strip 53 is fixedly connected to the right limiting plate 52, and the other end of the second connecting strip 53 is fixedly connected to the right threaded plate 55. Threaded holes are provided on the left threaded plate 54 and the right threaded plate 55. One end of the bidirectional screw rod 56 is threadedly connected to the left threaded plate 54 through the threaded hole, and the other end of the bidirectional screw rod 56 is threadedly connected to the right threaded plate 55 through the threaded hole. Both ends of the bidirectional screw rod 56 are rotatably connected to the frame body 1.

[0041] With such arrangement, when the insulation bag is transported to the cutting mechanism by the front part of the bag making machine's cutting device, the limit plate can ensure that the position of the insulation bag does not shift when it moves forward on the pad 3, thereby avoiding the phenomenon that the insulation bag's incision is uneven or the incision deviates from the cutting mark of the insulation bag due to the deviation of the insulation bag's position. The staff can drive the left limit rod and the right limit rod to retract or expand synchronously by rotating the two-way screw rod 56, allowing the staff to adjust the distance between the left limit plate 51 and the right limit plate 52 according to the different specifications of the insulation bags produced, thereby ensuring the limiting effect of the left limit plate 51 and the right limit plate 52 on the insulation bag.

[0042] Optionally, see Figure 1 and Figure 2 A handle 561 is provided at one end of the bidirectional screw rod 56 away from the left threaded plate 54 .

[0043] With such arrangement, the handle 561 allows the staff to more effortlessly turn the bidirectional screw rod 56 to adjust the distance between the left limit plate 51 and the right limit plate 52 when necessary, thereby improving the convenience when using the equipment.

[0044] In some embodiments, see Figures 1 to 7 A third sliding groove 33 is provided on the pad 3, and a third connecting bar 57 is slidably connected inside the third sliding groove 33. One end of the third connecting bar 57 is fixedly connected to the right limiting plate 52, and the other end of the third connecting bar 57 is fixedly connected to the right threaded plate 55. An optical axis 12 is provided on the frame 1, and the optical axis 12 passes through the left threaded plate 54 and the right threaded plate 55. The left threaded plate 54 and the right threaded plate 55 are both slidably connected to the optical axis 12.

[0045] With such arrangement, the optical axis 12 can limit the left thread plate 54 and the right thread plate 55 , thereby preventing the left limit plate 51 and the right limit plate 52 from deviating during adjustment.

[0046] Optionally, in some embodiments, see Figure 5 and Figure 7A plurality of limiting wheels 511 are rotatably connected to the left limiting plate 51 and the right limiting plate 52 .

[0047] With such arrangement, when the insulation bag moves between the left limit plate 51 and the right limit plate 52, the edge of the insulation bag that contacts the left limit plate 51 or the right limit plate 52 may be deformed due to extrusion, resulting in curling of the edge of the insulation bag. The limiting wheel 511 can limit the edge of the insulation bag when the insulation bag moves, thereby preventing the edge of the insulation bag from warping or curling.

[0048] Optionally, see Figures 1 to 5 A transmission mechanism is also provided on the frame 1, and the transmission mechanism includes a conveyor belt 61, a transmission roller 62, a driven roller 63 and a motor 64. The transmission roller 62 and the driven roller 63 are both rotatably connected to the frame 1, the conveyor belt 61 is sleeved on the transmission roller 62 and the driven roller 63, the motor 64 is arranged at the bottom of the frame 1, and a second transmission wheel 641 is sleeved on the output end of the motor 64, and one end of the transmission roller 62 is sleeved on the first transmission wheel 621, and the first transmission wheel 621 is connected to the second transmission wheel 641 through a transmission belt.

[0049] In this arrangement, the motor 64 drives the transmission roller 62 to rotate through the cooperation of the first transmission wheel 621, the transmission belt and the second transmission wheel 641, and the transmission roller 62 drives the conveyor belt 61 and the driven roller 63 to rotate. The conveyor belt 61 can transport the insulation bags cut by the cutting mechanism to avoid the insulation bags from piling up on the pad 3 and affecting the subsequent cutting of the insulation bags.

[0050] The above description is only a preferred embodiment of the present application and is not intended to limit the present application. Any modifications, equivalent substitutions and improvements made within the spirit and principles of the present application should be included in the protection scope of the present application.

Claims

1. A cutting device for a heat preservation bag making machine, characterized in that: The invention comprises a frame (1), a support leg (2), a pad (3) and a cutting mechanism, wherein the support leg (2) is arranged at the bottom of the frame (1), both ends of the pad (3) are fixedly connected to the frame (1), a cutting slit (31) is provided on the pad (3), and the cutting mechanism comprises a fixed plate (41), a hydraulic press (42) and a cutting knife (43), both ends of the fixed plate (41) are fixedly connected to the frame (1), a first sliding groove (11) is provided on the frame (1), and both ends of the cutting knife (43) are slidably connected to the frame (1) through the first sliding groove (11), and the hydraulic press (42) is arranged on the fixed plate (41), and the output end of the hydraulic press (42) passes through the fixed plate (41). The cutting knife (43) is connected to the cutting knife (43) in driving mode. The two sides of the cutting knife (43) are provided with fixing strips (44). The fixing strips (44) are provided with a plurality of spring grooves (441). The spring grooves (441) are slidably connected with first connecting strips (442). The spring grooves (441) are also provided with springs (443). One end of the spring (443) abuts against the top of the spring groove (441). The other end of the spring (443) abuts against one end of the first connecting strip (442). A pressing plate (45) is provided at one end of the first connecting strip (442) away from the spring (443). The side of the pressing plate (45) away from the first connecting strip (442) is flush with the blade of the cutting knife (43).

2. The cutting device of the heat preservation bag making machine according to claim 1, characterized in that: A non-slip pad (451) is provided on a side of the pressing plate (45) away from the first connecting strip (442).

3. The cutting device of the heat preservation bag making machine according to claim 2, characterized in that: A limiting mechanism is provided on the pad (3), and the limiting mechanism comprises a left limiting plate (51), a right limiting plate (52), a second connecting strip (53), a left threaded plate (54), a right threaded plate (55) and a bidirectional screw rod (56). A second sliding groove (32) is provided on the pad (3), and the second connecting strip (53) is slidably connected inside the second sliding groove (32). One end of the second connecting strip (53) is fixedly connected to the right limiting plate (52), and the other end of the second connecting strip (53) is fixedly connected to the right threaded plate (55). Threaded holes are provided on the left threaded plate (54) and the right threaded plate (55). One end of the bidirectional screw rod (56) is threadedly connected to the left threaded plate (54) through the threaded hole, and the other end of the bidirectional screw rod (56) is threadedly connected to the right threaded plate (55) through the threaded hole. Both ends of the bidirectional screw rod (56) are rotatably connected to the frame body (1).

4. The cutting device of the heat preservation bag making machine according to claim 3, characterized in that: A handle (561) is provided at one end of the bidirectional screw rod (56) away from the left threaded plate (54).

5. The cutting device of the heat preservation bag making machine according to claim 4, characterized in that: The pad (3) is provided with a third sliding groove (33), and a third connecting strip (57) is slidably connected inside the third sliding groove (33). One end of the third connecting strip (57) is fixedly connected to the right limit plate (52), and the other end of the third connecting strip (57) is fixedly connected to the right threaded plate (55). An optical axis (12) is provided on the frame (1), and the optical axis (12) passes through the left threaded plate (54) and the right threaded plate (55), and the left threaded plate (54) and the right threaded plate (55) are both slidably connected to the optical axis (12).

6. The cutting device of the heat preservation bag making machine according to claim 5, characterized in that: The left limiting plate (51) and the right limiting plate (52) are both rotatably connected with a plurality of limiting wheels (511).

7. The cutting device of the heat preservation bag making machine according to claim 6, characterized in that: The frame (1) is also provided with a transmission mechanism, which comprises a transmission belt (61), a transmission roller (62), a driven roller (63) and a motor (64); the transmission roller (62) and the driven roller (63) are both rotatably connected to the frame (1); the transmission belt (61) is sleeved on the transmission roller (62) and the driven roller (63); the motor (64) is arranged at the bottom of the frame (1); a second transmission wheel (641) is sleeved on the output end of the motor (64); one end of the transmission roller (62) is sleeved on the first transmission wheel (621); the first transmission wheel (621) and the second transmission wheel (641) are connected by transmission belt transmission.

Images