Heat sealing mechanism of packaging machine

Abstract

The utility model discloses a heat sealing mechanism of a packaging machine in the field of food packaging, which comprises a U-shaped frame, the bottom of the inner wall of the U-shaped frame is provided with a driving component used for driving operation, and one end of the driving component is provided with a moving component used for moving heat sealing. According to the packaging bag heat sealing device, the heat sealing assembly can be controlled to conduct heat sealing operation on a packaging bag, meanwhile, the cutting assembly can be controlled to conduct cutting operation immediately after heat sealing operation is finished, the heat sealing operation and the cutting operation can be carried out alternately, and therefore the situation that the packaging bag is cut before being completely heat-sealed when heat sealing and cutting are carried out at the same time can be avoided; and secondly, by arranging a clamping assembly, after hot air operation is finished, through elastic reset of a clamping spring, a clamping block can fix and clamp the packaging bag prepared to be cut, the packaging bag is not prone to displacement, and then the situation that cutting is uneven can be avoided.

Description

Technical Field

[0001] The utility model relates to the field of food packaging, in particular to a heat-sealing mechanism of a packaging machine. Background Technique

[0002] Heat-sealing of a packaging machine refers to a form of sealing by pressing through high-temperature melting. In the packaging industry, the types of packaging machines are divided into heat-sealing type (hot pressing) and cold-sealing type (ultrasonic). By sealing the packaging bag, it can prevent items from leaking out of the packaging bag, thus facilitating the subsequent transportation of the items.

[0003] After retrieval, the utility model patent with the patent number CN220032395U discloses a heat-sealing mechanism of a packaging machine, including a panel. A left moving seat is arranged on the right side of the panel. A left melting plate is arranged on the right side of the left moving seat. A cutting knife is slidably nested in the middle of the left melting plate. The cutting knife is installed on the left moving seat. Second connecting rods are slidably nested at both the front and rear ends of the left melting plate. The right ends of the two second connecting rods are jointly connected to a right moving seat. A right melting plate is fixed on the left side of the right moving seat. First springs are connected between both ends of the left moving seat and both ends of the left melting plate. The utility model can realize cutting immediately after heat-sealing, improve the heat-sealing and cutting effect. At the same time, there is no need to set a cylinder or an electric cylinder, reducing the cost. And both ends of the left melting plate are slidably sleeved on the second connecting rods through collar rings, enabling the left melting plate and the right melting plate to be accurately aligned, improving the heat-sealing quality and effect.

[0004] However, in the above patent, although the left melting plate and the right melting plate can be effectively contacted by the elastic force of the first spring to heat-seal the food packaging bag, and the left moving seat pushes the cutting knife to extend out of the first knife groove to cut the food packaging bag, so that cutting is carried out immediately after heat-sealing. However, in the actual use process, when heat-sealing and cutting are carried out simultaneously, it may occur that the food packaging bag is cut before it is completely heat-sealed, resulting in the need to re-heat-seal again. Moreover, there is a lack of a fixing and clamping component for the packaging bag, which is likely to cause the position of the packaging bag to move during cutting, which is not conducive to people's use. Therefore, those skilled in the art provide a heat-sealing mechanism of a packaging machine to solve the problems raised in the above background technique. Content of the Utility Model

[0005] The purpose of the utility model is to provide a heat-sealing mechanism of a packaging machine to solve the problems raised in the above background technique.

[0006] To achieve the above object, the utility model provides the following technical solutions: a heat-sealing mechanism for a packaging machine, including a U-shaped frame. At the bottom of the inner wall of the U-shaped frame, there is a driving component for driving operation. At one end of the driving component, there is a moving component for moving heat-sealing. On the outer wall of the moving component, there is a heat-sealing component for heat-sealing a packaging bag. At the end of the heat-sealing component, there is a clamping component for fixedly clamping the packaging bag. At the other end of the driving component, there is a cutting component for cutting the packaging bag after heat-sealing.

[0007] Preferably: The driving component includes a motor, a rotating rod, and a cam. The motor is installed at the bottom of the inner wall of the U-shaped frame through bolts. The output shaft of the motor is fixedly installed with the rotating rod. On one side of the top of the U-shaped frame, there is a welded support plate. The end of the rotating rod away from the motor is rotationally connected to the bottom surface of the support plate through a bearing seat. The surface of the rotating rod is fixedly installed with a cam. One end of the cam is provided with a moving component, and the other end of the cam is provided with a cutting component.

[0008] Preferably: The moving component includes a connecting plate, a moving rod, and a mounting cylinder. One end of the cam is provided with a connecting plate in contact with it. On the side of the connecting plate, there are moving rods welded on both sides of the cam. On the inner wall of the U-shaped frame, there is a mounting cylinder installed on one side of the moving rod through screws. One end of the moving rod passes through the mounting cylinder and the U-shaped frame and is welded with a stop block. And the moving rod is slidably connected to both the mounting cylinder and the U-shaped frame. At both ends on the side of the connecting plate away from the moving rod, there are first springs fixedly installed. The other ends of the first springs are fixedly installed on the inner wall of the U-shaped frame. On the outer wall of the moving rod, there is a heat-sealing component.

[0009] Preferably: The heat-sealing component includes a first heat-sealing plate, a second heat-sealing plate, and a second spring. On the outer wall of the moving rod, from left to right, there are arranged a first heat-sealing plate and a second heat-sealing plate on one side of the U-shaped frame in parallel. Both ends of the first heat-sealing plate are slidably sleeved on the outer wall of the moving rod. Both ends of the second heat-sealing plate are fixedly installed on the outer wall of the moving rod. On the side of the first heat-sealing plate away from the second heat-sealing plate, there is a second spring welded on the outer wall of the moving rod. The other end of the second spring is welded to the side wall of the U-shaped frame. At the ends of the first heat-sealing plate and the second heat-sealing plate, there is a clamping component.

[0010] Preferably: The clamping component includes a fixed frame, a clamping block, a limiting rod, and a clamping spring. At the end parts of the top and bottom surfaces of the first heat-sealing plate and the second heat-sealing plate, there are symmetrically welded fixed frames respectively. On one side of the fixed frame, there is a rectangular groove. Inside the rectangular groove, there is a clamping block. On one side of the clamping block, there is a limiting rod welded inside the rectangular groove. The end of the limiting rod away from the clamping block passes through the fixed frame and is welded with a limiting block. And the limiting rod is slidably connected to the fixed frame. On the surface of the limiting rod, there is a clamping spring sleeved between the limiting block and the outer side wall of the fixed frame.

[0011] Preferably, one end of the clamping spring is fixedly connected to the side surface of the limiting block, and the other end of the clamping spring is fixedly connected to the outer side wall of the fixed frame.

[0012] Preferably, the cutting assembly includes a movable plate, a movable rod, a fixed cylinder and a cutting knife. The other end of the cam is provided with a movable plate in contact with it. The side surface of the movable plate away from the cam is symmetrically welded with movable rods. The inner wall of the U-shaped frame is provided with a fixed cylinder on one side of the movable rod through screws. One end of the movable rod penetrates through the fixed cylinder and the U-shaped frame and is welded to the side wall of the cutting knife, and the movable rod is slidably connected to both the fixed cylinder and the U-shaped frame. A third spring sleeved on the surface of the movable rod is fixedly installed between the side wall of the cutting knife and the side surface of the U-shaped frame.

[0013] Compared with the prior art, the beneficial effects of the present utility model are as follows:

[0014] 1. In the present utility model, in the heat-sealing mechanism of the packaging machine, by arranging a cam in the driving assembly, not only can the heat-sealing assembly be controlled to perform heat-sealing operation on the packaging bag, but also after the heat-sealing operation is completed, the cutting assembly can be controlled to immediately perform cutting operation, enabling the cross-operation of heat-sealing operation and cutting operation, thus avoiding the situation that the packaging bag is not fully heat-sealed and is cut when heat-sealing and cutting are carried out simultaneously.

[0015] 2. In the present utility model, in the heat-sealing mechanism of the packaging machine, by providing a clamping assembly, after the hot air operation is completed, through the elastic reset of the clamping spring, the clamping block can fix and clamp the packaging bag when preparing for cutting, so that it will not be easily displaced, thereby avoiding the situation of uneven cutting. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 is a schematic diagram of the overall structure of the present utility model;

[0017] Figure 2 is a top view of the overall structure of the present utility model;

[0018] Figure 3 is Figure 2 an enlarged cross-sectional view of A in

[0019] In the figure: 1, U-shaped frame; 6, support plate; 7, rectangular groove; 11, motor; 12, rotating rod; 13, cam; 21, connecting plate; 22, moving rod; 23, mounting cylinder; 24, stop block; 25, first spring; 31, first melting plate; 32, second melting plate; 33, second spring; 41, fixed frame; 42, clamping block; 43, limiting rod; 44, clamping spring; 45, limiting block; 51, movable plate; 52, movable rod; 53, fixed cylinder; 54, cutting knife; 55, third spring. DETAILED DESCRIPTION OF THE EMBODIMENTS

[0020] Next, in combination with the accompanying drawings in the embodiments of the present invention, the technical solutions in the embodiments of the present invention will be clearly and completely described. Obviously, the described embodiments are only a part of the embodiments of the present invention, rather than all the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without making creative efforts shall fall within the protection scope of the present invention.

[0021] Please refer to Figures 1 to 3 , in the embodiment of the present invention, the heat-sealing mechanism of the packaging machine includes a U-shaped frame 1. A driving component for driving operation is provided at the bottom of the inner wall of the U-shaped frame 1. The driving component includes a motor 11, a rotating rod 12, and a cam 13. The motor 11 is installed at the bottom of the inner wall of the U-shaped frame 1 through bolts. The output shaft of the motor 11 is fixedly installed with the rotating rod 12. One side of the top of the U-shaped frame 1 is welded with a support plate 6. The end of the rotating rod 12 away from the motor 11 is rotatably connected to the bottom surface of the support plate 6 through a bearing seat. The surface of the rotating rod 12 is fixedly installed with the cam 13. When in use, the motor 11 is started. When the output shaft of the motor 11 rotates, the rotating rod 12 is driven to rotate synchronously, and thus the cam 13 is driven to rotate by the rotation of the rotating rod 12.

[0022] One end of the cam 13 is provided with a moving component for moving heat-sealing. The moving component includes a connecting plate 21, a moving rod 22, and an installation cylinder 23. One end of the cam 13 is provided with a connecting plate 21 in contact with it. The side of the connecting plate 21 is welded with moving rods 22 located on both sides of the cam 13. The inner wall of the U-shaped frame 1 is installed with an installation cylinder 23 on one side of the moving rod 22 through screws. One end of the moving rod 22 penetrates through the installation cylinder 23 and the U-shaped frame 1 and is welded with a stop block 24. And the moving rod 22 is slidably connected to both the installation cylinder 23 and the U-shaped frame 1. Both ends of the side of the connecting plate 21 away from the moving rod 22 are fixedly installed with a first spring 25. The other end of the first spring 25 is fixedly installed on the inner wall of the U-shaped frame 1.

[0023] When in use, when the cam 13 rotates, when its longer end abuts against the connecting plate 21, at this time the connecting plate 21 drives the moving rod 22 to move away from the motor 11 on one side of the inner walls of the installation cylinder 23 and the U-shaped frame 1. When the moving rod 22 moves, the stop block 24 welded to its end moves in the same direction. At the same time, the connecting plate 21 applies a squeezing force to the first spring 25, so that the first spring 25 undergoes a compressive deformation. When the longer end of the cam 13 releases the abutment against the connecting plate 21 and its shorter end abuts against the connecting plate 21, at this time the first spring 25 undergoes a reset deformation, thereby driving the connecting plate 21 to move towards the side close to the motor 11. When the connecting plate 21 moves, the moving rod 22 drives the stop block 24 to move synchronously.

[0024] The outer wall of the moving rod 22 is provided with a heat sealing assembly for heat sealing the packaging bag, and the heat sealing assembly includes a first melting plate 31, a second melting plate 32 and a second spring 33. The outer wall of the moving rod 22 is provided with a first melting plate 31 and a second melting plate 32 located on one side of the U-shaped frame 1 in sequence from left to right. The two ends of the first melting plate 31 are slidably mounted on the outer wall of the moving rod 22, and the two ends of the second melting plate 32 are fixedly installed on the outer wall of the moving rod 22. The side of the first melting plate 31 away from the second melting plate 32 is welded with a second spring 33 mounted on the outer wall of the moving rod 22, and the other end of the second spring 33 is welded to the side wall of the U-shaped frame 1.

[0025] When in use, when the longer end of the cam 13 hits the connecting plate 21, the moving rod 22 drives the second melting plate 32 fixedly connected to its outer wall to move in the same direction. When the second melting plate 32 contacts the first melting plate 31 driven by the moving rod 22, the second melting plate 32 applies an extrusion force to the first melting plate 31, so that the second spring 33 is compressed and deformed. At the same time, the second spring 33 rebounds by itself, so that the first melting plate 31 and the second melting plate 32 can effectively perform heat sealing operations on the food packaging bag. When the longer end of the cam 13 releases the impact on the connecting plate 21, at this time, under the elastic reset deformation of the first spring 25, the moving rod 22 drives the second melting plate 32 to move toward the side away from the first melting plate 31 through the connecting plate 21. At the same time, the second spring 33 is reset and deformed, thereby driving the first melting plate 31 to move to the initial position, thereby releasing the heat seal of the food packaging bag.

[0026] The ends of the first melting plate 31 and the second melting plate 32 are provided with a clamping assembly for fixing and clamping the packaging bag, and the clamping assembly includes a fixing frame 41, a clamping block 42, a limiting rod 43 and a clamping spring 44. The ends of the top and bottom surfaces of the first melting plate 31 and the second melting plate 32 are symmetrically welded with the fixing frame 41, and a rectangular groove 7 is opened on one side of the fixing frame 41. A clamping block 42 is arranged inside the rectangular groove 7, and a limiting rod 43 located inside the rectangular groove 7 is welded on one side of the clamping block 42. One end of the limiting rod 43 away from the clamping block 42 passes through the fixing frame 41 and is welded with a limiting block 45, and the limiting rod 43 is slidably connected to the fixing frame 41. The surface of the limiting rod 43 is sleeved with a clamping spring 44 located between the limiting block 45 and the outer wall of the fixing frame 41, one end of the clamping spring 44 is fixedly connected to the side of the limiting block 45, and the other end of the clamping spring 44 is fixedly connected to the outer wall of the fixing frame 41.

[0027] During use, when the first melting plate 31 and the second melting plate 32 are in contact for heat sealing, the side of the clamping block 42 that is close to each other will collide with each other. When the clamping block 42 is in conflict, one end of the limit rod 43 is driven to move toward the side away from the fixed frame 41, and the clamping spring 44 is stretched and deformed. When the first melting plate 31 and the second melting plate 32 are separated from each other after the heat sealing operation is completed, the clamping spring 44 is reset and deformed, thereby driving the limit rod 43 to move toward one side of the fixed frame 41 through the limit block 45. When the limit rod 43 moves, it drives the clamping block 42 out of the rectangular groove 7, so that the clamping block 42 moves toward the side close to each other, and then the packaging bag can be fixed and clamped, so that it will not move in position during subsequent operations.

[0028] The other end of the cam 13 is provided with a cutting assembly for cutting the packaging bag after heat sealing, and the cutting assembly includes a movable plate 51, a movable rod 52, a fixed cylinder 53 and a cutting knife 54. The other end of the cam 13 is provided with a movable plate 51 in contact with it, and the movable plate 51 is symmetrically welded with the side of the movable plate 51 away from the cam 13. The inner wall of the U-shaped frame 1 is fixed with a fixed cylinder 53 located on one side of the movable rod 52 by screws. One end of the movable rod 52 passes through the fixed cylinder 53 and the U-shaped frame 1 and is welded to the side wall of the cutting knife 54, and the movable rod 52 is slidably connected to the fixed cylinder 53 and the U-shaped frame 1. A third spring 55 sleeved on the surface of the movable rod 52 is fixedly installed between the side wall of the cutting knife 54 and the side of the U-shaped frame 1.

[0029] When in use, when the longer end of the cam 13 releases the interference with the connecting plate 21, the longer end of the cam 13 rotates to one side of the movable plate 51, thereby interfering with the movable plate 51, and then the movable plate 51 drives the movable rod 52 to move toward the side away from the motor 11, and when the movable rod 52 moves, it drives the cutting knife 54 to move synchronously, so that the cutting knife 54 can immediately cut the packaging bag after the heat sealing operation of the first melting plate 31 and the second melting plate 32 is completed. When the cutting knife 54 performs the cutting operation, the third spring 55 is stretched and deformed. When the cutting operation is completed, the third spring 55 elastically resets, so that the cutting knife 54 moves toward the side away from the packaging bag, and at the same time, the movable rod 52 drives the movable plate 51 to move toward the side close to the motor 11.

[0030] Working principle: When the heat sealing mechanism of the packaging machine is used, first start the motor 11 to control the driving component to rotate and run. When the longer end of the cam 13 hits the connecting plate 21, it drives the moving rod 22 to move toward the side away from the motor 11. At the same time, the connecting plate 21 applies an extrusion force to the first spring 25 to compress and deform it. When the moving rod 22 moves, the second melting plate 32 moves in the same direction. When the second melting plate 32 contacts the first melting plate 31 and applies an extrusion force to the first melting plate 31, the second spring 33 is compressed and deformed. At the same time, through the elastic rebound of the second spring 33 itself, the first melting plate 31 and the second melting plate 32 can effectively perform heat sealing operations on the food packaging bag. When the first melting plate 31 and the second melting plate 32 hit each other, the adjacent sides of the clamping block 42 hit each other and drive the limit rod 43. The cam 13 is then moved to a side away from the fixed frame 41, and the clamping spring 44 is stretched and deformed. At this time, the cam 13 continues to rotate. When the longer end thereof is out of contact with the connecting plate 21 and contacts the movable plate 51, the second spring 33 is reset and deformed. The first melting plate 31 is driven to move to the initial position by the cooperation of the connecting plate 21 and the movable rod 22, thereby releasing the heat seal of the food packaging bag. Then the clamping spring 44 is reset and deformed, thereby driving the limiting rod 43 to move toward one side of the fixed frame 41 through the limiting block 45, thereby causing the clamping block 42 to move out of the rectangular groove 7 so that they continue to contact each other, and the packaging bag can be fixedly clamped. At the same time, the movable plate 51 drives the movable rod 52 to move toward the side away from the motor 11, so that the cutting knife 54 cuts the food packaging bag after the heat sealing operation is completed.

[0031] The above description is only a preferred specific implementation manner of the present invention, but the protection scope of the present invention is not limited thereto. Any technician familiar with the technical field can make equivalent replacements or changes within the technical scope disclosed by the present invention according to the technical scheme and the utility model concept of the present invention, which should be covered by the protection scope of the present invention.

Claims

1. Heat-sealing mechanism of a packaging machine, including a U-shaped frame (1), characterized in that: A driving component for driving operation is provided at the bottom of the inner wall of the U-shaped frame (1). One end of the driving component is provided with a moving component for moving heat-sealing. A heat-sealing component for heat-sealing the packaging bag is provided on the outer wall of the moving component. A clamping component for fixedly clamping the packaging bag is provided at the end of the heat-sealing component. The other end of the driving component is provided with a cutting component for cutting after heat-sealing the packaging bag; The driving component includes a motor (11), a rotating rod (12) and a cam (13). The motor (11) is installed at the bottom of the inner wall of the U-shaped frame (1) by bolts. The output shaft of the motor (11) is fixedly installed with the rotating rod (12). One side of the top of the U-shaped frame (1) is welded with a support plate (6). The end of the rotating rod (12) away from the motor (11) is rotatably connected to the bottom surface of the support plate (6) through a bearing seat. The surface of the rotating rod (12) is fixedly installed with the cam (13). One end of the cam (13) is provided with a moving component, and the other end of the cam (13) is provided with a cutting component.

2. The heat-sealing mechanism of the packaging machine according to claim 1, wherein: The moving component includes a connecting plate (21), a moving rod (22) and a mounting cylinder (23). One end of the cam (13) is provided with a connecting plate (21) in contact with it. The side of the connecting plate (21) is welded with moving rods (22) located on both sides of the cam (13). The inner wall of the U-shaped frame (1) is installed with a mounting cylinder (23) on one side of the moving rod (22) by screws. One end of the moving rod (22) penetrates through the mounting cylinder (23) and the U-shaped frame (1) and is welded with a stop block (24). And the moving rod (22) is slidably connected to both the mounting cylinder (23) and the U-shaped frame (1). Both ends of the side of the connecting plate (21) away from the moving rod (22) are fixedly installed with a first spring (25). The other end of the first spring (25) is fixedly installed on the inner wall of the U-shaped frame (1). The outer wall of the moving rod (22) is provided with a heat-sealing component.

3. The heat-sealing mechanism of the packaging machine according to claim 2, wherein: The heat-sealing component includes a first melting pressing plate (31), a second melting pressing plate (32) and a second spring (33). The outer wall of the moving rod (22) is successively provided with a first melting pressing plate (31) and a second melting pressing plate (32) located on one side of the U-shaped frame (1) from left to right in parallel. Both ends of the first melting pressing plate (31) are slidably sleeved on the outer wall of the moving rod (22). Both ends of the second melting pressing plate (32) are fixedly installed on the outer wall of the moving rod (22). The side of the first melting pressing plate (31) away from the second melting pressing plate (32) is welded with a second spring (33) sleeved on the outer wall of the moving rod (22). The other end of the second spring (33) is welded to the side wall of the U-shaped frame (1). The ends of the first melting pressing plate (31) and the second melting pressing plate (32) are provided with a clamping component.

4. The heat-sealing mechanism of the packaging machine according to claim 3, wherein: The clamping assembly includes a fixed frame (41), a clamping block (42), a limiting rod (43) and a clamping spring (44). Fixed frames (41) are symmetrically welded to the end portions of the top and bottom surfaces of the first melting pressing plate (31) and the second melting pressing plate (32). A rectangular groove (7) is formed in one side of the fixed frame (41). A clamping block (42) is arranged inside the rectangular groove (7). A limiting rod (43) welded to one side of the clamping block (42) is arranged inside the rectangular groove (7). One end of the limiting rod (43) far from the clamping block (42) penetrates through the fixed frame (41) and is welded with a limiting block (45). The limiting rod (43) is slidably connected to the fixed frame (41). A clamping spring (44) is sleeved on the surface of the limiting rod (43) between the limiting block (45) and the outer side wall of the fixed frame (41).

5. The heat-sealing mechanism of the packaging machine according to claim 4, characterized in that: One end of the clamping spring (44) is fixedly connected to the side surface of the limiting block (45), and the other end of the clamping spring (44) is fixedly connected to the outer side wall of the fixed frame (41).

6. The heat-sealing mechanism of the packaging machine according to claim 1, characterized in that: The cutting assembly includes a movable plate (51), a movable rod (52), a fixed cylinder (53) and a cutting knife (54). The other end of the cam (13) is provided with a movable plate (51) in contact with it. Movable rods (52) are symmetrically welded to the side surface of the movable plate (51) far from the cam (13). A fixed cylinder (53) located on one side of the movable rod (52) is installed on the inner wall of the U-shaped frame (1) by screws. One end of the movable rod (52) penetrates through the fixed cylinder (53) and the U-shaped frame (1) and is welded to the side wall of the cutting knife (54). The movable rod (52) is slidably connected to both the fixed cylinder (53) and the U-shaped frame (1). A third spring (55) sleeved on the surface of the movable rod (52) is fixedly installed between the side wall of the cutting knife (54) and the side surface of the U-shaped frame (1).

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