Film guiding and correcting mechanism of food vacuum skin packaging machine

Abstract

The invention discloses a food vacuum skin packaging machine film guiding and correcting mechanism, and relates to the field of food vacuum skin packaging machine film guiding and correcting, the food vacuum skin packaging machine film guiding and correcting mechanism comprises a bearing plate and a base, the upper end of the base is provided with a bottom plate, and the bearing plate is provided with an adjusting mechanism; the device has the advantages that the height of a film close to the end of the positioning plate can be raised or lowered, the film is prevented from being rubbed with the end of the positioning plate in the moving process, meanwhile, the partition plates apply elastic thrust to the two sides of the film, the film is clamped and positioned, and the film is stably arranged in the guide grooves; the film is prevented from falling off from the interior of the guide groove in the moving process, the moving smoothness and stability of the film are effectively improved, when the position of the film deviates in the moving process, the position of the film is convenient to adjust, the position of the film is convenient to correct, and the film moves more smoothly; and the impact force generated by inertia between the base and the film guiding and correcting mechanism when the base moves to the end part of the guide rail can be buffered.

Description

Technical Field

[0001] This invention relates to the field of film guidance and correction in food vacuum skin packaging machines, and particularly to a film guidance and correction mechanism for food vacuum skin packaging machines. Background Technology

[0002] In the field of vacuum skin packaging for food, the accuracy of film guidance directly affects the sealing performance and preservation effect of the packaging. Traditional packaging machines mostly use manual correction devices, requiring manual rotation of the lead screw to adjust the film position. This results in problems such as response lag and insufficient accuracy, easily leading to misalignment of the upper and lower films and the production of defective products. Early mechanical guiding mechanisms used sliding bearing rollers, which were prone to scratching the film due to frictional heat, and the gap between adjacent rollers could easily cause the film to get stuck, increasing the scrap rate.

[0003] However, in the existing food vacuum skin packaging machine film guiding and correction mechanism, the film is affected by the tensile force during the movement and correction process, which makes it easy for the film to fall out of the guide groove, causing the film to roll up and affecting the movement. When the height of the film near the end of the positioning plate is higher or lower than the height of the guide groove, the film is prone to rubbing against the end of the positioning plate during the movement. Summary of the Invention

[0004] The purpose of this invention is to provide a film guiding and correction mechanism for a food vacuum skin packaging machine, so as to solve the problems mentioned in the background art.

[0005] To solve the above-mentioned technical problems, the technical solution of the present invention is a film guiding and correction mechanism for a food vacuum skin packaging machine, comprising a load-bearing plate and a base. A bottom plate is provided on the upper end of the base, and an adjustment mechanism is provided on the load-bearing plate. The adjustment mechanism includes a guide rail, and a first motor is provided at the end of the guide rail. A lead screw is provided on the rotating shaft of the first motor. The end of the lead screw extends into the interior of the guide rail, and a slider is threadedly connected to the lead screw and located inside the guide rail.

[0006] As a further embodiment of the present invention: a limiting groove is provided at the upper end of the load-bearing plate and on both sides of the guide rail; a limiting plate is provided at the bottom end of the base and near both sides; and a slot is provided at the bottom end of the base and in the middle position.

[0007] As a further embodiment of the present invention: the top of the slider is fixedly connected to the top of the slot, the limiting plate is slidably disposed in the corresponding limiting groove, the base is slidably secured to the guide rail through the slot, and the base is slidably disposed on the upper end of the load-bearing plate along the guide rail through the slot, slider, limiting plate, limiting groove and lead screw in cooperation with the first motor.

[0008] As a further embodiment of the present invention: a side plate is provided at the upper end of the load-bearing plate and on both sides of the guide rail; a first groove is provided on the side wall of the side plate and on both sides of the guide rail; a transverse groove is provided on the two inner side walls of the first groove; a sliding plate is slidably disposed inside the transverse groove; a spring piece is provided inside the transverse groove and on one side of the sliding plate; a push plate is provided between the two sets of sliding plates and inside the first groove; and a baffle is provided at the end of the push plate.

[0009] As a further embodiment of the present invention: the two ends of the spring sheet are respectively fixed to the inner side wall of the transverse groove and the side wall of the slide plate, and the baffle is movably disposed on one side of the side plate through the spring sheet, the slide plate and the first groove in cooperation with the push plate. The spring sheet is made of an elastic alloy material bent into shape.

[0010] As a further embodiment of the present invention: a base plate is provided at the upper end of the base, and a positioning mechanism is provided at the upper end of the base plate and at both sides. The positioning mechanism includes a positioning plate, and a guide groove is provided on the side wall of the positioning plate at the middle position. A second groove is provided on both the upper and lower sides of the guide groove. A plurality of telescopic rods are provided on the inner side wall of the second groove. A partition is provided at the bottom end of the telescopic rod, and a plurality of rollers are equidistantly arranged on the side of the partition away from the telescopic rod.

[0011] As a further embodiment of the present invention: two sets of positioning plates are symmetrically arranged on the upper end of the base plate, a spring is wound around the telescopic rod and located on one side of the partition, the partition is movably arranged inside the second groove by means of the spring and the telescopic rod, and the roller is rotatably arranged on the partition.

[0012] As a further embodiment of the present invention: support plates are provided at both ends of the positioning plate and below the guide groove, a rotating groove is provided on the side wall of the support plate, a second motor is provided at the end of the support plate, the rotating shaft of the second motor extends into the rotating groove, a bracket is provided on the rotating shaft of the second motor and inside the rotating groove, and a rotating shaft is rotatably provided on the top of the bracket.

[0013] As a further embodiment of the present invention: the bottom of the bracket is rotatably mounted on the support plate by means of a second motor and a rotating groove, and the rotating shaft is rotatably mounted on the end of the positioning plate by means of the bracket and the second motor and a rotating groove.

[0014] Compared with the prior art, the beneficial effects of the present invention are as follows: The film is secured in the corresponding guide grooves on both sides. The spring, in conjunction with the telescopic rod, pushes the partition plate out of the second groove to both sides of the film, causing the roller to adhere to its sidewall, thus clamping and positioning the film. The film is then placed between the two sets of positioning plates, with the end of the film near the positioning plate resting on the rotating shaft. The second motor is then activated, causing the support to rotate clockwise. The support, through the rotating groove, drives the rotating shaft to rotate clockwise around the support plate, thereby raising the shaft and increasing the film's height. The film near the positioning plate is then raised to the same horizontal level as the guide groove. The second motor is then activated, causing the support to rotate counterclockwise. The support, through the rotating groove, drives the rotating shaft to rotate counterclockwise around the support plate, thereby lowering the shaft and reducing the film's height. The film near the positioning plate is then raised to the same horizontal level as the guide groove. At the same horizontal level, the partition, through a telescopic rod and spring, pops out from the second groove and clamps the film on both sides, thus securing and positioning the film to prevent it from falling out of the guide groove. The rotating shaft and roller can rotate with the film, effectively preventing the film's movement from being affected during the adjustment of the film height and the clamping and positioning process. Through the above operations, the height of the film located near the end of the positioning plate can be raised or lowered, preventing the film from rubbing against the end of the positioning plate during movement. At the same time, the partition applies elastic thrust to both sides of the film, clamping and positioning it stably inside the guide groove, preventing the film from falling out of the guide groove during movement. Through the above operations, the smoothness and stability of film movement are effectively improved.

[0015] The limiting plates at the bottom of the base are respectively installed inside the corresponding limiting grooves. The base is slidably locked onto the guide rail via the slots and fixed at the top of the slider. The operator starts the first motor located at the end of the guide rail, causing the lead screw to rotate clockwise inside the guide rail. The lead screw drives the slider to move to the left inside the guide rail. The first motor at the end of the guide rail then causes the lead screw to rotate counterclockwise inside the guide rail, driving the slider to move to the right inside the guide rail. The first motor, through the lead screw, drives the slider to move left and right inside the guide rail, thereby causing the base and base plate to move left and right along the guide rail on the load-bearing plate. When the base moves to the end of the guide rail, the bottom... The impact baffle, under the impact force of the base, pushes the push plate into the first groove on the side plate. The push plate pushes the slide plate to the left along the transverse groove. The slide plate squeezes the spring sheet, gradually compressing it. The spring sheet absorbs energy during compression, thus buffering the impact force and the inertia of the base when it suddenly stops. Through the above operation, when the position of the diaphragm shifts during movement, it is easy to adjust the position of the diaphragm, thus facilitating the diaphragm position correction and making its movement smoother. It can also buffer the impact force caused by inertia between the base and the diaphragm guiding and correction mechanism when the base moves to the end of the guide rail. Attached Figure Description

[0016] Figure 1 This is a schematic diagram of the overall structure of a film guiding and correction mechanism for a food vacuum skin packaging machine. Figure 2 This is a schematic diagram of the structure of the base plate and the limiting plate of a film guiding and correcting mechanism for a food vacuum skin packaging machine; Figure 3 A schematic diagram of the limiting plate of a film guiding and correcting mechanism for a food vacuum skin packaging machine; Figure 4 A schematic diagram of the partition structure of a film guiding and correcting mechanism in a food vacuum skin packaging machine; Figure 5 This is a schematic diagram of the support structure of a film guiding and correction mechanism for a food vacuum skin packaging machine; Figure 6 This is a schematic diagram of the side plate and push plate of a film guiding and correcting mechanism for a food vacuum skin packaging machine; Figure 7 This is a schematic diagram of the side plate and slide plate of a film guiding and correcting mechanism for a food vacuum skin packaging machine.

[0017] In the diagram: 1. Load-bearing plate; 2. Base; 3. Base plate; 4. Adjustment mechanism; 5. Guide rail; 6. Lead screw; 7. Slider; 8. First motor; 9. Limiting groove; 10. Limiting plate; 11. Side plate; 12. First groove; 13. Horizontal groove; 14. Slide plate; 15. Spring; 16. Push plate; 17. Baffle; 18. Positioning mechanism; 19. Positioning plate; 20. Guide groove; 21. Second groove; 22. Partition; 23. Roller; 24. Telescopic rod; 25. Support plate; 26. Rotary groove; 27. Bracket; 28. Rotating shaft; 29. ​​Second motor; 30. Slot. Detailed Implementation

[0018] The specific embodiments of the present invention will be further described below with reference to the accompanying drawings. It should be noted that these descriptions are for the purpose of aiding understanding the present invention, but do not constitute a limitation thereof. Furthermore, the technical features involved in the various embodiments of the present invention described below can be combined with each other as long as they do not conflict with each other. Example

[0019] Please see Figures 1-7 The present invention provides a technical solution: a film guiding and correction mechanism for a food vacuum skin packaging machine, including a load-bearing plate 1 and a base 2. A base plate 3 is provided on the upper end of the base 2. An adjustment mechanism 4 is provided on the load-bearing plate 1. The adjustment mechanism 4 includes a guide rail 5. A first motor 8 is provided at the end of the guide rail 5. A lead screw 6 is provided on the rotating shaft of the first motor 8. The end of the lead screw 6 extends into the interior of the guide rail 5. A slider 7 is threadedly connected to the lead screw 6 and located inside the guide rail 5.

[0020] A base plate 3 is provided on the upper end of the base 2. A positioning mechanism 18 is provided on both sides of the upper end of the base plate 3. The positioning mechanism 18 includes a positioning plate 19. A guide groove 20 is provided on the side wall of the positioning plate 19 and in the middle position. A second groove 21 is provided on both the upper and lower sides of the guide groove 20. Several sets of telescopic rods 24 are provided on the inner side wall of the second groove 21. A partition 22 is provided at the bottom end of the telescopic rod 24. Several sets of rollers 23 are equidistantly arranged on the side of the partition 22 away from the telescopic rod 24.

[0021] Two sets of positioning plates 19 are symmetrically arranged on the upper end of the base plate 3. A spring is wound on the telescopic rod 24 and located on one side of the partition 22. The partition 22 is movably arranged inside the second groove 21 through the spring and the telescopic rod 24. The roller 23 is rotatably arranged on the partition 22. The partition pops out from the second groove through the telescopic rod and the spring and clamps the film on both sides, which can clamp and position the film to prevent it from falling out of the guide groove.

[0022] Support plates 25 are provided at both ends of the positioning plate 19 and below the guide groove 20. The side wall of the support plate 25 has a rotating groove 26. A second motor 29 is provided at the end of the support plate 25. The rotating shaft of the second motor 29 extends into the rotating groove 26. A bracket 27 is provided on the rotating shaft of the second motor 29 and inside the rotating groove 26. A rotating shaft 28 is rotatably provided on the top of the bracket 27. When the second motor is started, the bracket rotates clockwise. The bracket drives the rotating shaft to rotate clockwise around the support plate through the rotating groove, thereby raising the rotating shaft and increasing the height of the film. The film near the end of the positioning plate is raised to the same horizontal level as the guide groove. When the second motor is started, the bracket rotates counterclockwise. The bracket drives the rotating shaft to rotate counterclockwise around the support plate through the rotating groove, thereby lowering the rotating shaft and decreasing the height of the film. The film near the end of the positioning plate is raised to the same horizontal level as the guide groove.

[0023] The bottom of the bracket 27 is rotatably mounted on the support plate 25 via the second motor 29 and the rotating groove 26. The rotating shaft 28 is rotatably mounted on the end of the positioning plate 19 via the bracket 27 and the second motor 29 around the support plate 25. The rotating shaft and the roller shaft can rotate with the movement of the film, effectively avoiding affecting the movement of the film during the adjustment of the film height and the clamping and positioning of the film.

[0024] In use, the operator places the load-bearing plate 1 of the film guiding and correcting mechanism on the food vacuum skin packaging machine. The position of the base plate 3 on the base 2 is adjusted using the adjusting mechanism 4, thus correcting the film position. After the film position is corrected, both sides of the film are respectively clamped into the corresponding guide grooves 20. At this time, the spring, in conjunction with the telescopic rod 24, pushes the partition plate 22 from inside the second groove 21 to both sides of the film, causing the roller shaft 23 to adhere to its sidewall, clamping and positioning the film. The film is then placed between the two sets of positioning plates 19. At this time, the end of the film near the positioning plate 19 rests on the rotating shaft 28. The second motor 29 is then started, driving the bracket 27 to rotate clockwise. The bracket 27, through the rotating groove 26, drives the rotating shaft 28 to rotate clockwise around the support plate 25, thereby lifting the rotating shaft 28 and raising the height of the film. The end of the film near the positioning plate 19 is lifted to the same horizontal level as the guide groove 20. The second motor 29 is then started, driving the bracket 27 to rotate counterclockwise. The bracket 27, through the rotating groove 26, drives the roller shaft 28 to rotate counterclockwise around the support plate 25, thus lifting the rotating shaft 28 and raising the height of the film. The rotating shaft 28 rotates counterclockwise around the support plate 25, thereby lowering the shaft 28 to reduce the height of the film. This raises the film near the end of the positioning plate 19 to the same horizontal level as the guide groove 20. Through the partition 22, the film is ejected from the second groove 21 via the telescopic rod 24 and spring, and clamped on both sides of the film. This clamps and positions the film, preventing it from falling out of the guide groove 20. The rotating shaft 28 and roller 23 can rotate with the movement of the film, effectively preventing the film's movement from being affected during the adjustment of the film height and the clamping and positioning of the film. Through the above operation, the height of the film near the end of the positioning plate 19 can be raised or lowered, preventing the film from rubbing against the end of the positioning plate 19 during movement. At the same time, the partition 22 applies an elastic thrust to both sides of the film, clamping and positioning the film to ensure it is stably placed inside the guide groove 20, preventing the film from falling out of the guide groove 20 during movement. Through the above operation, the smoothness and stability of the film movement are effectively improved. Example

[0025] Please see Figures 1-7 The present invention provides a technical solution: a film guiding and correction mechanism for a food vacuum skin packaging machine, including a load-bearing plate 1 and a base 2. A base plate 3 is provided on the upper end of the base 2. An adjustment mechanism 4 is provided on the load-bearing plate 1. The adjustment mechanism 4 includes a guide rail 5. A first motor 8 is provided at the end of the guide rail 5. A lead screw 6 is provided on the rotating shaft of the first motor 8. The end of the lead screw 6 extends into the interior of the guide rail 5. A slider 7 is threadedly connected to the lead screw 6 and located inside the guide rail 5.

[0026] Limiting grooves 9 are provided on the upper end of the load-bearing plate 1 and on both sides of the guide rail 5. Limiting plates 10 are provided on the bottom end of the base 2 and near both sides. A slot 30 is provided on the bottom end of the base 2 and in the middle. The top of the slider 7 is fixedly connected to the top of the slot 30. The limiting plates 10 are slidably disposed in the corresponding limiting grooves 9. The base 2 is slidably locked onto the guide rail 5 through the slots 30. The base 2, through the slots 30, slider 7, limiting plates 10, limiting grooves 9, and lead screw 6, cooperates with the first motor 8 to move along the guide rail. The guide rail 5 is slidably mounted on the upper end of the load-bearing plate 1. The first motor 8 located at the end of the guide rail 5 causes the lead screw 6 to rotate clockwise inside the guide rail 5. The lead screw 6 drives the slider 7 to move to the left inside the guide rail 5. The first motor 8 at the end of the guide rail 5 causes the lead screw 6 to rotate counterclockwise inside the guide rail 5. The lead screw 6 drives the slider 7 to move to the right inside the guide rail 5. The first motor 8 drives the slider 7 to move left and right inside the guide rail 5 through the lead screw 6, thereby driving the base 2 and the base plate 3 to move left and right along the guide rail 5 on the load-bearing plate 1.

[0027] Side plates 11 are provided on the upper end of the load-bearing plate 1 and on both sides of the guide rail 5. The side walls of the side plates 11 and on both sides of the guide rail 5 are provided with first grooves 12. The two inner side walls of the first grooves 12 are provided with transverse grooves 13. Slide plates 14 are slidably arranged inside the transverse grooves 13. Spring pieces 15 are provided inside the transverse grooves 13 and on one side of the slide plates 14. A push plate 16 is provided between the two sets of slide plates 14 and inside the first grooves 12. A baffle 17 is provided at the end of the push plate 16.

[0028] The two ends of the spring piece 15 are fixed to the inner side wall of the transverse groove 13 and the side wall of the slide plate 14, respectively. The baffle 17 is movably set on one side of the side plate 11 through the spring piece 15, the slide plate 14 and the first groove 12 in conjunction with the push plate 16. The spring piece 15 is made of elastic alloy material and is bent. The slide plate 14 squeezes the spring piece 15 to gradually compress it. The spring piece 15 absorbs energy during the compression process to buffer the impact force, thereby buffering the inertia of the base 2 when it stops suddenly.

[0029] Specifically, the limiting plates 10 at the bottom of the base 2 are respectively placed inside the corresponding limiting grooves 9, and the base 2 is slidably locked onto the guide rail 5 through the slot 30 and fixed at the top of the slider 7. The operator starts the first motor 8 at the end of the guide rail 5, causing the lead screw 6 to rotate clockwise inside the guide rail 5. The lead screw 6 drives the slider 7 to move to the left inside the guide rail 5. The first motor 8 at the end of the guide rail 5 causes the lead screw 6 to rotate counterclockwise inside the guide rail 5. The lead screw 6 drives the slider 7 to move to the right inside the guide rail 5. The first motor 8 drives the slider 7 to move left and right inside the guide rail 5 through the lead screw 6, thereby causing the base 2 and the base plate 3 to move left and right along the guide rail 5 on the load-bearing plate 1. When the base 2 moves to the guide rail 5 At the end, the base 2 impacts the baffle 17. Under the impact force of the base 2, the baffle 17 pushes the push plate 16 into the first groove 12 on the side plate 11. The push plate 16 pushes the slide plate 14 to move to the left along the transverse groove 13. The slide plate 14 squeezes the spring sheet 15 to gradually compress it. The spring sheet 15 absorbs energy during the compression process to buffer the impact force, thereby buffering the inertia of the base 2 when it stops suddenly. Through the above operation, when the position of the film shifts during the movement, it is convenient to adjust the position of the film, thereby facilitating the film position correction to make its movement smoother. It can also buffer the impact force caused by inertia between the base 2 and the film guiding correction mechanism when the base 2 moves to the end of the guide rail 5.

[0030] Working principle: The operator places the load-bearing plate 1 of the film guiding and correcting mechanism on the food vacuum skin packaging machine. The limiting plates 10 at the bottom of the base 2 are respectively placed inside the corresponding limiting grooves 9. The base 2 is slidably secured to the guide rail 5 via the slot 30 and fixed at the top of the slider 7. The operator starts the first motor 8 at the end of the guide rail 5, causing the lead screw 6 to rotate clockwise inside the guide rail 5. The lead screw 6 drives the slider 7 to move to the left inside the guide rail 5. The first motor 8 at the end of the guide rail 5 then causes the lead screw 6 to rotate counterclockwise inside the guide rail 5, driving the slider 7 to move to the right inside the guide rail 5. The first motor 8, through the lead screw 6, drives the slider 7 to move left and right inside the guide rail 5, thereby causing the base 2 and the base plate 3 to move along the guide rail 5 on the load-bearing plate 1. Moving left and right, when the base 2 moves to the end of the guide rail 5, the base 2 impacts the baffle 17. Under the impact force of the base 2, the baffle 17 pushes the push plate 16 into the first groove 12 on the side plate 11. The push plate 16 pushes the slide plate 14 to move to the left along the transverse groove 13. The slide plate 14 squeezes the spring piece 15, gradually compressing it. The spring piece 15 absorbs energy during compression, thus buffering the impact force and the inertia of the base 2 when it suddenly stops. Through the above operation, when the position of the film shifts during movement, it is easy to adjust the position of the film, thus facilitating the film position correction and making its movement smoother. It can also buffer the impact force caused by inertia between the base 2 and the film guiding correction mechanism when the base 2 moves to the end of the guide rail 5. The adjustment mechanism 4 adjusts the position of the base plate 3 on the base 2, thereby correcting the film position. After the film position is corrected, the two sides of the film are respectively clamped into the corresponding guide grooves 20. At this time, the spring and the telescopic rod 24 push the partition plate 22 out of the second groove 21 to the two sides of the film, so that the roller shaft 23 is attached to its side wall to clamp and position the film. The film is placed between the two sets of positioning plates 19. At this time, the end of the film near the positioning plate 19 rests on the rotating shaft 28. Then, the second motor 29 is started to drive the bracket 27 to rotate clockwise. The bracket 27 drives the rotating shaft 28 to rotate clockwise around the support plate 25 through the rotating groove 26, thereby lifting the rotating shaft 28 to raise the height of the film. The end of the film near the positioning plate 19 is lifted to the same level as the guide groove 20. In terms of height, starting the second motor 29 drives the bracket 27 to rotate counterclockwise. The bracket 27 drives the rotating shaft 28 to rotate counterclockwise around the support plate 25 through the rotating groove 26, thereby lowering the rotating shaft 28 to reduce the height of the film. This raises the film near the end of the positioning plate 19 to the same horizontal level as the guide groove 20. Through the partition 22, the film is ejected from the second groove 21 by the telescopic rod 24 and spring and clamped on both sides of the film. This clamps and positions the film to prevent it from falling out of the guide groove 20. The rotating shaft 28 and roller 23 can rotate with the movement of the film, effectively preventing the movement of the film from being affected during the adjustment of the film height and the clamping and positioning of the film. Through the above operation, the height of the film located near the end of the positioning plate 19 can be raised or lowered.To prevent the film from rubbing against the end of the positioning plate 19 during movement, the partition plate 22 applies an elastic pushing force to both sides of the film, clamping and positioning it stably within the guide groove 20. This prevents the film from falling out of the guide groove 20 during movement. These operations effectively improve the smoothness and stability of film movement.

[0031] The embodiments of the present invention have been described in detail above with reference to the accompanying drawings, but the present invention is not limited to the described embodiments. For those skilled in the art, various changes, modifications, substitutions, and variations can be made to these embodiments without departing from the principles and spirit of the present invention, and these variations still fall within the protection scope of the present invention.

Claims

1. A film guiding and correction mechanism for a food vacuum skin packaging machine, comprising a load-bearing plate (1) and a base (2), characterized in that: The base (2) is provided with a base plate (3) at the upper end, and the load-bearing plate (1) is provided with an adjustment mechanism (4). The adjustment mechanism (4) includes a guide rail (5), and a first motor (8) is provided at the end of the guide rail (5). The rotating shaft of the first motor (8) is provided with a lead screw (6). The end of the lead screw (6) extends into the guide rail (5), and a slider (7) is threadedly connected to the lead screw (6) and located inside the guide rail (5).

2. The film guiding and correction mechanism for a food vacuum skin packaging machine according to claim 1, characterized in that: Limiting grooves (9) are provided on the upper end of the load-bearing plate (1) and on both sides of the guide rail (5). Limiting plates (10) are provided on the bottom end of the base (2) and near both sides. A slot (30) is provided on the bottom end of the base (2) and in the middle.

3. The film guiding and correction mechanism for a food vacuum skin packaging machine according to claim 2, characterized in that: The top of the slider (7) is fixedly connected to the top of the slot (30). The limiting plate (10) is slidably disposed inside the corresponding limiting groove (9). The base (2) is slidably disposed on the guide rail (5) through the slot (30). The base (2) is slidably disposed on the upper end of the load-bearing plate (1) along the guide rail (5) through the slot (30), slider (7), limiting plate (10), limiting groove (9) and lead screw (6) in cooperation with the first motor (8).

4. The film guiding and correction mechanism for a food vacuum skin packaging machine according to claim 3, characterized in that: Side plates (11) are provided on the upper end of the load-bearing plate (1) and on both sides of the guide rail (5). A first groove (12) is provided on the side wall of the side plate (11) and on both sides of the guide rail (5). A transverse groove (13) is provided on both inner side walls of the first groove (12). A slide plate (14) is slidably provided inside the transverse groove (13). A spring piece (15) is provided inside the transverse groove (13) and on one side of the slide plate (14). A push plate (16) is provided between the two sets of slide plates (14) and inside the first groove (12). A baffle (17) is provided at the end of the push plate (16).

5. The film guiding and correction mechanism for a food vacuum skin packaging machine according to claim 4, characterized in that: The two ends of the spring piece (15) are fixed to the inner side wall of the transverse groove (13) and the side wall of the slide plate (14) respectively. The baffle (17) is movably set on one side of the side plate (11) through the spring piece (15), the slide plate (14) and the first groove (12) in conjunction with the push plate (16). The spring piece (15) is made of elastic alloy material bent.

6. The film guiding and correction mechanism for a food vacuum skin packaging machine according to claim 1, characterized in that: The base (2) is provided with a base plate (3) at its upper end. The base plate (3) is provided with positioning mechanisms (18) at its upper end and on both sides. The positioning mechanism (18) includes a positioning plate (19). The positioning plate (19) has a guide groove (20) on its side wall and in the middle position. The guide groove (20) has a second groove (21) on both its upper and lower sides. The inner side wall of the second groove (21) is provided with several sets of telescopic rods (24). The bottom end of the telescopic rod (24) is provided with a partition (22). Several sets of rollers (23) are equidistantly arranged on the side of the partition (22) away from the telescopic rod (24).

7. The film guiding and correction mechanism for a food vacuum skin packaging machine according to claim 6, characterized in that: Two sets of positioning plates (19) are symmetrically arranged on the upper end of the base plate (3). A spring is wound on the telescopic rod (24) and located on one side of the partition (22). The partition (22) is movably arranged inside the second groove (21) through the spring and the telescopic rod (24). The roller (23) is rotatably arranged on the partition (22).

8. The film guiding and correction mechanism for a food vacuum skin packaging machine according to claim 7, characterized in that: The positioning plate (19) has support plates (25) at both ends and below the guide groove (20). The side wall of the support plate (25) has a rotating groove (26). The end of the support plate (25) has a second motor (29). The rotating shaft of the second motor (29) extends into the rotating groove (26). The rotating shaft of the second motor (29) is provided with a bracket (27) inside the rotating groove (26). The top of the bracket (27) is rotatably provided with a rotating shaft (28).

9. The film guiding and correction mechanism for a food vacuum skin packaging machine according to claim 8, characterized in that: The bottom of the bracket (27) is rotatably mounted on the support plate (25) via the second motor (29) and the rotating groove (26), and the rotating shaft (28) is rotatably mounted on the end of the positioning plate (19) via the bracket (27) and the second motor (29) around the support plate (25).

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