Film covering mechanism for vacuum packaging machine

Abstract

The utility model relates to a film covering mechanism for a vacuum packaging machine, which comprises a film covering supporting piece, a feeding mechanism and a tensioning mechanism for tensioning a film are arranged on one side of the film covering supporting piece, and an adjusting mechanism for adjusting the angle of the feeding mechanism is arranged on the other side of the film covering supporting piece. Limiting guide mechanisms matched with the widths of different films are arranged in the tensioning mechanism, and a pressing mechanism for pressing the films is further arranged on the top of the film covering supporting piece. According to the utility model, the adjusting mechanism is utilized to drive the position of the feeding mechanism to be adjusted according to the requirements of users, so that the tension degree of the film can be adjusted under different working environments.

Description

Technical Field

[0001] This utility model relates to the field of food packaging equipment technology, specifically to a film-coating mechanism for a vacuum packaging machine. Background Technology

[0002] A laminating machine is a device used to coat a product surface with a thin film, playing a crucial role before vacuum packaging. The working principle of a laminating machine is to mechanically adhere the film smoothly to the product surface, typically using either hot laminating or cold laminating methods. Hot laminating uses a heating device to soften the film, allowing for better adhesion to the product; cold laminating requires no heating and is suitable for heat-sensitive materials. The structure of a laminating machine mainly consists of an unwinding device, a conveying device, a heating device, a pressure device, and a rewinding device. Before vacuum packaging, the laminating machine first coats the product, ensuring the film adheres smoothly and without air bubbles to the product surface, providing a good sealing foundation for subsequent vacuum packaging. Laminating machines are easy to operate and produce excellent laminating results, and are widely used in the food, printing, and electronic equipment industries.

[0003] The authorization announcement number CN219524343U discloses a film-coating machine for food packaging. According to its instruction manual and drawings, the solution is as follows: a rotary motor controls the rotation of the clamping plate to drive the rotation of the food packaging box, and the heat shrink film is covered around the packaging box. In addition, an electric push rod controls the clamping distance, thereby adapting to food packaging boxes of different sizes.

[0004] However, there are still limitations to using this structure to achieve membrane tension. How to effectively and quickly adjust the tension of the coating, especially under different ambient temperatures, and how to ensure the final flatness of the coating during the coating process so that wrinkles are not easily formed are also issues that need to be considered. Summary of the Invention

[0005] This invention addresses the problems existing in the film coating mechanism by proposing a film coating mechanism for a vacuum packaging machine. According to the user's needs, the adjustment mechanism drives the feeding support plate to rotate, thereby adjusting the position of the first and second film coating shafts, so that the tension of the film is adjustable under different working environments.

[0006] The purpose of this invention is achieved through the following technical solution: a film-coating mechanism for a vacuum packaging machine, comprising a film-coating support member, a feeding mechanism and a tensioning mechanism for tensioning the film on one side of the film-coating support member, an adjustment mechanism for adjusting the angle of the feeding mechanism on the other side of the film-coating support member, a limiting guide mechanism adapted to different film widths inside the tensioning mechanism, and a pressing mechanism for pressing the film on the top of the film-coating support member.

[0007] Preferably, the feeding mechanism includes a feeding support plate, a first coating shaft and a second coating shaft. One side of the feeding support plate is connected to an adjustment mechanism via a surface passing through the coating support member. The other side of the feeding support plate is provided with a first coating shaft and a second coating shaft. The surface of the first coating shaft is used for winding film. The first coating shaft and the second coating shaft are rotatable relative to the feeding support plate.

[0008] Preferably, the adjustment mechanism includes a drive motor and a first photoelectric sensor. The shaft of the drive motor is connected to one side of the feeding support plate. The surface of the film-coating support is provided with a plurality of first photoelectric sensors. The drive motor can drive the feeding support plate to rotate to the surface of different first photoelectric sensors.

[0009] Preferably, the limiting and guiding mechanism includes a guide support rod, a limiting circular plate, an adjusting sleeve, and a locking rod. The surface of the guide support rod is provided with a plurality of limiting circular plates, the width between adjacent limiting circular plates is equal to the width of the membrane, and an adjusting sleeve is connected to one side of at least one limiting circular plate. The adjusting sleeve and the guide support rod can be slidably adjusted, and the end of the guide support rod is provided with a locking rod for clamping the adjusting sleeve.

[0010] Preferably, the tensioning mechanism includes a tensioning support frame, a third coating shaft, a fourth coating shaft, a fifth coating shaft, and a sixth coating shaft. The tensioning support frame has the third, fourth, fifth, and sixth coating shafts inside. The sixth coating shaft is located at the bottom of the tensioning support frame, and the fifth coating shaft is adjacent to the sixth coating shaft. The third and fourth coating shafts are located at the top of the tensioning support frame. The film from the feeding mechanism is sequentially attached to the surfaces of the third, fifth, fourth, and sixth coating shafts. This arrangement is to further tension the film.

[0011] Preferably, the coating support is made of metal sheet, and a belt conveyor for transporting food is provided below the feeding mechanism and the tensioning mechanism. This arrangement is designed to give the ham slices to be coated a tendency to move to the left.

[0012] Preferably, the pressing mechanism includes a pressing support plate, a first cylinder, a pressing block, and a silicone pad. The pressing support plate is disposed on the top of the tensioning support frame. The first cylinder is disposed on the surface of the pressing support plate. The piston rod of the first cylinder passes through the surface of the pressing support plate and is connected to the pressing block. The silicone pad is disposed at the bottom of the pressing block. This arrangement is to enable the silicone pad to quickly adjust the tension of the film during the movement of the entire film coating mechanism.

[0013] Preferably, a counting support plate is provided on one side of the tensioning support frame, and a second photoelectric sensor is provided on the side of the counting support plate for detecting the number of food slices after coating. This setting is for detecting the number of ham slices that have been coated.

[0014] Compared with existing technologies, this utility model has the following advantages: 1. By setting the first photoelectric sensor distributed in three different positions, the position of the feeding support plate is determined based on the first photoelectric sensor. Then, according to the user's needs, the rotating shaft of the drive motor drives the feeding support plate to rotate, thereby adjusting the position of the first and second film-coating shafts, making the film tension adjustable under different working environments; 2. During the operation of the entire film-coating mechanism, when further tensioning the film, the piston rod of the first cylinder adjusts the adhesion force between the silicone pad and the film. The degree of film tension is controllable, ensuring the flatness of the final film coating and preventing wrinkles; 3. To prevent the film from deviating during tensioning and conveying, the locking rod can be loosened so that it no longer presses against the adjusting sleeve. Sliding the adjusting sleeve simultaneously drives the limiting circular plate, causing the width between adjacent limiting circular plates to change. At this time, the adjusted distance needs to be exactly matched with the width of the film at that time, optimizing the film coating effect. Attached Figure Description

[0015] Figure 1 This is a perspective view of the present utility model;

[0016] Figure 2 This is a partial perspective view of the present invention;

[0017] Figure 3 This is a perspective view of the present utility model;

[0018] Figure 4 This is a partial perspective view of the present invention;

[0019] Figure 5 This is a perspective view of the present utility model;

[0020] Figure 6 This is a partially enlarged view of the present invention.

[0021] The diagram shows the following components: 1. Coating support; 2. Feeding mechanism; 21. Feeding support plate; 22. First coating shaft; 23. Second coating shaft; 3. Tensioning mechanism; 31. Tensioning support frame; 32. Third coating shaft; 33. Fourth coating shaft; 34. Fifth coating shaft; 35. Sixth coating shaft; 36. Counting support plate; 37. Second photoelectric sensor; 4. Adjusting mechanism; 41. Drive motor; 42. First photoelectric sensor; 5. Limiting guide mechanism; 51. Guide support rod; 52. Limiting circular plate; 53. Adjusting sleeve; 54. Locking rod; 6. Pressing mechanism; 61. Pressing support plate; 62. First cylinder; 63. Pressing block; 64. Silicone pad; 7. Belt conveyor. Detailed Implementation

[0022] The present invention will be further described below with reference to the embodiments shown in the accompanying drawings:

[0023] like Figures 1 to 6 As shown, a film-coating mechanism for a vacuum packaging machine includes a film-coating support 1. A feeding mechanism 2 and a tensioning mechanism 3 for tensioning the film are provided on one side of the film-coating support 1. The film-coating support 1 is made of aluminum sheet. A belt conveyor 7 for conveying food is located below the feeding mechanism 2 and the tensioning mechanism 3.

[0024] The surface of the belt conveyor 7 is provided with several material placement troughs, and then a film is laid on the surface of the material placement troughs. Then, several materials that need to be vacuum-packed are placed on the surface of the film. These materials move to the left as they are conveyed by the belt on the surface of the belt conveyor 7.

[0025] On the other side of the film-coating support 1, there is an adjustment mechanism 4 for adjusting the angle of the feeding mechanism 2. The tensioning mechanism 3 has a limiting guide mechanism 5 inside that is adapted to different film widths.

[0026] The feeding mechanism 2 includes a feeding support plate 21, a first film-coating shaft 22, and a second film-coating shaft 23. One side of the feeding support plate 21 is connected to the surface passing through the film-coating support member 1 and connected to the adjustment mechanism 4. The other side of the feeding support plate 21 is provided with the first film-coating shaft 22 and the second film-coating shaft 23. The surface of the first film-coating shaft 22 is used for wrapping film. The first film-coating shaft 22 and the second film-coating shaft 23 can rotate relative to the feeding support plate 21.

[0027] The film to be laid is first wound around the surface of the first film-coating shaft 22. The film pulled from the first film-coating shaft 22 first adheres to the surface of the limiting guide mechanism 5, and then is pulled to the surface of the second film-coating shaft 23. Therefore, during the rotation of the feeding support plate 21, the second film-coating shaft 23 is used to initially adjust the tension of the film.

[0028] In order to better adjust the rotation angle of the feeding support plate 21, the adjustment mechanism 4 includes a drive motor 41 and a first photoelectric sensor 42. The shaft of the drive motor 41 is connected to one side of the feeding support plate 21. The surface of the film-coated support 1 is provided with a plurality of first photoelectric sensors 42. The drive motor 41 can drive the feeding support plate 21 to rotate to the surface of different first photoelectric sensors 42.

[0029] The entire feeding support plate 21 has three different angle adjustments, corresponding to three different positions of the first photoelectric sensor 42. Whenever the angle of the feeding mechanism 2 needs to be adjusted, the first photoelectric sensor 42 first determines the current position of the feeding support plate 21. Then, according to the user's needs, the electrical control cabinet uses the drive motor 41 to rotate the feeding support plate 21. When the feeding support plate 21 rotates to the designated position of the first photoelectric sensor 42, the first photoelectric sensor 42 receives a signal and controls the drive motor 41 to stop rotating.

[0030] As the feeding support plate 21 rotates, the positions of the first coating shaft 22 and the second coating shaft 23 will also change accordingly.

[0031] The limiting and guiding mechanism 5 includes a guide support rod 51, a limiting circular plate 52, an adjusting sleeve 53, and a locking rod 54. The surface of the guide support rod 51 is provided with a plurality of limiting circular plates 52, and the width between adjacent limiting circular plates 52 is equal to the width of the membrane. At least one side of the limiting circular plate 52 is connected to an adjusting sleeve 53, and the adjusting sleeve 53 can slide and adjust with the guide support rod 51. The end of the guide support rod 51 is provided with a locking rod 54 for locking the adjusting sleeve 53.

[0032] Since the widths of the first coating shaft 22 and the second coating shaft 23 are much larger than the width of the film, to prevent the film from deviating during tensioning and conveying, the locking rod 54 can be loosened so that it no longer presses against the adjusting sleeve 53. Sliding the adjusting sleeve 53 simultaneously drives the limiting circular plates 52, causing a change in the width between adjacent limiting circular plates 52. The adjusted distance must then be precisely matched to the current width of the film. After retightening the locking rod 54, the distance between adjacent limiting circular plates 52 will not change. Subsequently, during film laying, its position relative to the bottom material will not change, preventing subsequent film misalignment and wrinkles.

[0033] The tensioning mechanism 3 includes a tensioning support frame 31, a third coating shaft 32, a fourth coating shaft 33, a fifth coating shaft 34, and a sixth coating shaft 35. The tensioning support frame 31 has the third coating shaft 32, the fourth coating shaft 33, the fifth coating shaft 34, and the sixth coating shaft 35 inside. The sixth coating shaft 35 is located at the bottom of the tensioning support frame 31. The fifth coating shaft 34 is adjacent to the sixth coating shaft 35. The third coating shaft 32 and the fourth coating shaft 33 are located at the top of the tensioning support frame 31. The film from the feeding mechanism 2 is sequentially attached to the surfaces of the third coating shaft 32, the fifth coating shaft 34, the fourth coating shaft 33, and the sixth coating shaft 35.

[0034] The membrane pulled out by the second coating shaft 23 is sequentially wound around the surfaces of the third coating shaft 32, the fifth coating shaft 34, the fourth coating shaft 33, and the sixth coating shaft 35, further tensioning the membrane to be laid through these winding arrangements. The third coating shaft 32, the fifth coating shaft 34, the fourth coating shaft 33, and the sixth coating shaft 35 can all rotate relative to the tensioning support frame 31 during the tensioning guidance process.

[0035] The tension support frame 31 is also provided with a counting support plate 36 on one side, and a second photoelectric sensor 37 for detecting the quantity of food after film coating is provided on the side of the counting support plate 36.

[0036] Since the coated material has a certain thickness and the quantity of material in each row is known, it will continuously count as the material passes the bottom of the second photoelectric sensor 37, thereby obtaining the number of products that have been successfully coated.

[0037] The top of the film-coated support 1 is also provided with a film-pressing mechanism 6. The pressing mechanism 6 includes a pressing support plate 61, a first cylinder 62, a pressing block 63, and a silicone pad 64. The pressing support plate 61 is disposed on the top of the tensioning support frame 31. The surface of the pressing support plate 61 is provided with the first cylinder 62. The piston rod of the first cylinder 62 passes through the surface of the pressing support plate 61 and is connected to the pressing block 63. The bottom of the pressing block 63 is provided with a silicone pad 64.

[0038] When further tensioning of the film is required during the operation of the laminating mechanism, the piston rod of the first cylinder 62 controls the movement of the clamping block 63. During this movement, the clamping block 63 adjusts the adhesion force between the silicone pad 64 and the film. When the adhesion is tight, the film is stretched more; when the adhesion is loose, the film is stretched less. This method ensures the final lamination is smooth and prevents wrinkles.

[0039] Working principle and usage of this utility model:

[0040] When meat products such as ham slices need to be coated before vacuum packaging, the material on the surface of the belt conveyor 7 moves to the left as the belt is conveyed. When it moves to the bottom of the sixth coating shaft 35, the sixth coating shaft 35 rotates and spreads the film evenly on the surface of the ham slice.

[0041] If it is necessary to adjust the flatness of the laid membrane, there are two adjustment methods;

[0042] The first method involves determining the position of the feeding support plate 21 based on the first photoelectric sensor 42. Then, according to the user's needs, the electrical control cabinet is used to drive the shaft of the drive motor 41 to rotate the feeding support plate 21. When the feeding support plate 21 rotates to the designated position of the first photoelectric sensor 42, the first photoelectric sensor 42 receives a signal and controls the drive motor 41 to stop rotating. During the rotation of the feeding support plate 21, the second film-coating shaft 23 is used to initially adjust the tension of the film.

[0043] The second method involves the piston rod of the first cylinder 62 controlling the movement of the clamping block 63. During its movement, the clamping block 63 adjusts the adhesion force between the silicone pad 64 and the film. When the adhesion is tight, the film is stretched further; when the adhesion is loose, the film is stretched less. This method ensures the final film flatness and prevents wrinkles.

[0044] The specific embodiments described herein are merely illustrative examples illustrating the spirit of this utility model. Those skilled in the art to which this utility model pertains may make various modifications or additions to the described specific embodiments or use similar methods to replace them, without departing from the spirit of this utility model or exceeding the scope defined by the appended claims.

Claims

1. A film covering mechanism for a vacuum packaging machine, comprising a film covering support (1), characterized in that, One side of the film supporting part (1) is provided with a feeding mechanism (2) and a tensioning mechanism (3) for tensioning the film, the other side of the film supporting part (1) is provided with an adjusting mechanism (4) for adjusting the angle of the feeding mechanism (2), the inside of the tensioning mechanism (3) is provided with a limiting guide mechanism (5) adapted to the width of different films, the top of the film supporting part (1) is further provided with a pressing mechanism (6) for pressing the film.

2. The film lamination mechanism for a vacuum packaging machine according to claim 1, characterized by, The feeding mechanism (2) comprises a feeding support plate (21), a first film winding shaft (22) and a second film winding shaft (23), one side of the feeding support plate (21) is connected to the surface of the film supporting part (1) and connected to the adjusting mechanism (4), the other side of the feeding support plate (21) is provided with the first film winding shaft (22) and the second film winding shaft (23), the surface of the first film winding shaft (22) is used for winding the film, and the first film winding shaft (22) and the second film winding shaft (23) can rotate relative to the feeding support plate (21).

3. The film lamination mechanism for a vacuum packaging machine according to claim 2, characterized by, The adjusting mechanism (4) comprises a driving motor (41) and a first photoelectric sensor (42), the rotating shaft of the driving motor (41) is connected to one side of the feeding support plate (21), and the surface of the film supporting part (1) is provided with a plurality of first photoelectric sensors (42), and the driving motor (41) can drive the feeding support plate (21) to rotate to the surface of different first photoelectric sensors (42).

4. The film lamination mechanism for a vacuum packaging machine according to claim 3, characterized by The limiting guide mechanism (5) comprises a guide support rod (51), a limiting circular plate (52), an adjusting sleeve (53) and a locking rod (54), the surface of the guide support rod (51) is provided with a plurality of limiting circular plates (52), the width between adjacent limiting circular plates (52) is equal to the width of the film, at least one limiting circular plate (52) is connected with an adjusting sleeve (53) on one side, the adjusting sleeve (53) and the guide support rod (51) can be slidably adjusted, and the end of the guide support rod (51) is provided with a locking rod (54) for clamping the adjusting sleeve (53).

5. The film lamination mechanism for a vacuum packaging machine according to claim 4, wherein The tensioning mechanism (3) comprises a tensioning support frame (31), a third film winding shaft (32), a fourth film winding shaft (33), a fifth film winding shaft (34) and a sixth film winding shaft (35), the inside of the tensioning support frame (31) is provided with the third film winding shaft (32), the fourth film winding shaft (33), the fifth film winding shaft (34) and the sixth film winding shaft (35), the sixth film winding shaft (35) is located at the bottom of the tensioning support frame (31), the fifth film winding shaft (34) is adjacent to the sixth film winding shaft (35), the third film winding shaft (32) and the fourth film winding shaft (33) are located at the top of the tensioning support frame (31), and the film of the feeding mechanism (2) is sequentially attached to the surfaces of the third film winding shaft (32), the fifth film winding shaft (34), the fourth film winding shaft (33) and the sixth film winding shaft (35).

6. The film lamination mechanism for a vacuum packaging machine according to claim 5, wherein The film supporting part (1) is made of metal plate, and the lower part of the feeding mechanism (2) and the tensioning mechanism (3) is provided with a belt conveyor (7) for conveying food.

7. The film lamination mechanism for a vacuum packaging machine according to claim 6, characterized by The pressing mechanism (6) comprises a pressing support plate (61), a first air cylinder (62), a pressing block (63) and a silica gel pad (64), the pressing support plate (61) is arranged at the top of the tensioning support frame (31), the surface of the pressing support plate (61) is provided with the first air cylinder (62), the piston rod of the first air cylinder (62) is connected with the pressing block (63) through the surface of the pressing support plate (61), and the bottom of the pressing block (63) is provided with the silica gel pad (64).

8. The film lamination mechanism for a vacuum packaging machine according to claim 5, wherein One side of the tensioning support frame (31) is also provided with a counting support plate (36), and the side surface of the counting support plate (36) is provided with a second photoelectric sensor (37) for detecting the number of foods after being coated.

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