Balanced feeding device for a film coating machine

Abstract

The utility model provides a balance feeding device for laminating machine relates to laminating machine field, the utility model discloses a control box is provided with on one side of laminating machine main part, the utility model discloses a limiting device is set up, after the support is welded and installed on laminating machine main part, can according to the size of laminating machine main part, manually through the adjusting mechanism the inclination angle of the deflector on the limiting plate is adjusted, is convenient for adapting the laminating machine main part of multiple sizes, before the object is placed on the first conveyor belt, can according to the size of object, wherein the drive mechanism drives two limiting plates and the deflector on the support to opposite or opposite direction slide to certain position, the object is conveniently positioned and centered processing, like this can ensure that the object on the first conveyor belt is transported to the placement roller and is covered film processing and is not easy to deviate, improves the laminating processing efficiency and effect, avoids causing the laminating failure and leads to the increase processing cost.

Description

Technical Field

[0001] This utility model relates to the field of laminating machines, and in particular to a balanced feeding device for laminating machines. Background Technology

[0002] A laminating machine is a device used to cover substrates such as paper, cloth, plastic, and foam board with film, while a balancing feeding device is a device used to ensure that the substrate is fed into the laminating machine smoothly and evenly during the lamination process.

[0003] When the object is placed on the first conveyor belt for feeding, the object's position cannot be positioned, which causes the foam board to easily shift when moving on the first conveyor belt. This causes the film to shift on the object, resulting in lamination failure, increasing lamination processing costs, and reducing the processing effect and efficiency of the laminating machine. Utility Model Content

[0004] The technical problem this invention aims to solve is that when an object is placed on the first conveyor belt for feeding, the object's position cannot be accurately positioned. This causes the foam board to easily shift as it moves on the first conveyor belt, resulting in a shift in the film's position on the object, leading to lamination failure, increased lamination processing costs, and reduced processing effect and efficiency of the laminating machine.

[0005] The technical solution adopted by this utility model to solve its technical problem is: a balanced feeding device for a laminating machine, comprising a laminating machine body and two first conveyor belts. A control box is provided on one side of the laminating machine body. Several first round shafts are symmetrically installed through the inner wall of the laminating machine body. The two first conveyor belts are respectively sleeved on the outer surfaces of two opposite first round shafts. A first motor is symmetrically fixedly installed on one side of the laminating machine body. The output end of the first motor is fixedly installed on one side of one of the first round shafts by means of a coupling. A placement roller is installed through the inner wall of the laminating machine body. A second motor is fixedly installed on one side of the laminating machine body. The output end of the second motor is fixedly installed on one side of the placement roller by means of a coupling. The placement roller is disposed between the two first conveyor belts. A first electric telescopic rod is fixedly installed on one side of the inner wall of the laminating machine body. A cutting blade is fixedly installed on the output rod of the first electric telescopic rod. The laminating... A second round shaft is symmetrically installed through the inner wall of the machine body. A second conveyor belt is fitted onto the outer surface of the second round shaft. A third motor is fixedly installed on one side of the laminating machine body. The output end of the third motor is fixedly installed on one side of one of the second round shafts via a coupling. The cutting blade is positioned between the second conveyor belt and the first conveyor belt. A second electric telescopic rod is fixedly installed on both sides of the third conveyor belt on the inner wall of the laminating machine body. A push rod is fixedly installed on the output rod of the second electric telescopic rod. A limit frame is symmetrically installed on the top of the laminating machine body. A limit device is installed at the end of the first conveyor belt away from the second conveyor belt. The limit device can center and limit the object placed on the first conveyor belt through two limit plates and two guide plates, and position the object's conveying position so that the object is in the exact center position before being fed to the placement roller for laminating processing and is not prone to displacement.

[0006] The effect achieved by the above components is as follows: When using a laminating machine to laminate the bottom of an object, firstly, a laminating roll with adhesive is installed on the placement roller, and then the object is placed on one of the first conveyor belts. Through the control box, the internal control module activates the limit device to center the object to be laminated. Then, through the control module, one of the first motors drives one of the first cylindrical shafts to rotate, which in turn drives the first conveyor belt to transport the object. When the object is transported between the two first conveyor belts, the adhesive film on the placement roller is adhered to the bottom of the foam. Simultaneously, the control module activates a second motor to rotate the placement roller and unwind the laminating roll. The object is then conveyed to another first conveyor belt, which simultaneously drives the first cylindrical shaft to rotate, thus conveying the coated object to the cutting blade. The control module then activates the first electric telescopic rod, which drives the cutting blade to cut the film. The cut coated object is then conveyed to the second conveyor belt. At this point, the third motor on the laminating machine body drives the second cylindrical shaft to rotate, moving the second conveyor belt and conveying the coated object to the push rod. The second electric telescopic rod is then activated, pushing the film extending from both sides of the object upwards, so that the film adheres to both sides of the object. Finally, the second conveyor belt conveys the coated object out of the laminating machine body, completing the laminating process.

[0007] Preferably, the limiting device includes a bracket and two guide plates, wherein both ends of the bracket are fixedly installed on one side of the main body of the film-coating machine; two limiting plates, wherein one side of the limiting plate abuts against one side of the first conveyor belt, and the inner wall of the other end is slidably installed on the outer surface of the bracket; a driving mechanism, wherein the driving mechanism is disposed between one side of the bracket and the two limiting plates, for adjusting and limiting the limiting distance between the two limiting plates; and an adjusting mechanism, wherein the adjusting mechanism is disposed between the limiting plate and the guide plate, for adjusting the angle of inclination of the guide plate on the limiting plate.

[0008] The effects achieved by the above components are as follows: By setting a limiting device, after the bracket is welded and installed on the main body of the laminating machine, the tilt angle of the guide plate on the limiting plate can be manually adjusted according to the size of the main body of the laminating machine through the adjustment mechanism. This facilitates the adaptation to laminating machine bodies of various sizes. Before placing the object on the first conveyor belt, the driving mechanism can drive the two limiting plates and the guide plate to slide to a certain position on the bracket in opposite or opposite directions according to the size of the object. This facilitates the positioning and centering of the object, ensuring that the object is not easily deviated when it is conveyed on the first conveyor belt to the placement roller for laminating processing. This improves the efficiency and effect of laminating processing, avoids laminating failure and increased processing costs, and improves the feeding effect of the first conveyor belt.

[0009] Preferably, a plurality of circular rollers are rotatably mounted on one side of both the limiting plate and the guide plate, and the plurality of circular rollers are arranged at equal intervals.

[0010] The effect achieved by the above components is that by setting up the circular roller, the contact friction between the object and the guide plate and the limiting plate can be reduced, which facilitates the conveying of the object, while not hindering its positioning and centering.

[0011] Preferably, the driving mechanism includes a third electric telescopic rod, one end of which is fixedly mounted on one side of the bracket; a U-shaped block, one side of which is fixedly mounted on the output rod side of the third electric telescopic rod; and two connecting rods, the two ends of which are respectively rotatably mounted in the inner wall of the U-shaped block and the inner wall of one end of the two limiting plates.

[0012] The effect achieved by the above components is as follows: by setting up a drive mechanism, when it is necessary to adjust the distance between the two limiting plates according to the size of the object, the third electric telescopic rod can be activated to retract, driving the U-shaped block to move upward. Thus, under the pull of the connecting rod, the two limiting plates can be driven to slide in opposite directions on the bracket. Similarly, the opposite operation can make the two limiting plates slide in opposite directions, so that it can perform centering and positioning processing for objects of different sizes.

[0013] Preferably, a plurality of reinforcing rods are fixedly installed on the outer surface of the output rod of the third electric telescopic rod, and one side of the reinforcing rod is fixedly installed on one side of the U-shaped block.

[0014] The effect achieved by the above components is that by setting up reinforcing rods, the connection area between the outer surface of the third electric telescopic rod output rod and the U-shaped block can be increased, making the connection more solid and stable.

[0015] Preferably, the adjustment mechanism includes a screw-hole operating rod, one end of which passes through one side of the limiting plate and is fixedly installed on one side of the guide plate, and the limiting plate has a plurality of threaded grooves on one side; and a bolt, one end of which is helically inserted into the inner wall of one end of the screw-hole operating rod and the inner wall of the threaded groove.

[0016] The effect achieved by the above components is as follows: By setting an adjustment mechanism, after the bracket is welded and installed on the main body of the laminating machine, the screw hole operating block can be manually held and rotated to a certain angle on the limit plate according to the size of the laminating machine body. This will drive the guide plate to rotate to a certain angle on the limit plate, making it easy to adapt to the corresponding laminating machine body. Then, the bolt is screwed into the inner wall of the screw hole operating rod and the corresponding thread groove to fix it. This can cooperate with the laminating machine body to maximize the flow guidance and centering of the object.

[0017] Preferably, a connecting rope is fixedly installed on one side of the bolt, and one end of the connecting rope is fixedly installed on one side of the screw hole operating rod.

[0018] The effect achieved by the above components is that by setting a connecting rope, the bolt can be limited to one side of the screw hole operating rod, so that it is not easy to lose after being spirally removed from the thread groove and the inner wall of the screw hole operating rod.

[0019] Preferably, a bearing is fixedly installed on the outer surface of one end of the screw hole operating rod, and the outer ring of the bearing is fixedly installed on one side of the limiting plate.

[0020] The effect achieved by the above components is that by setting bearings, the rotational wear between the screw hole operating rod and the limit plate can be reduced, making rotation adjustment easier and improving the service life of both.

[0021] The beneficial effects of this utility model are:

[0022] By setting a limiting device, after the bracket is welded and installed on the main body of the laminating machine, the tilt angle of the guide plate on the limiting plate can be manually adjusted by the adjusting mechanism according to the size of the laminating machine main body. This facilitates the adaptation to laminating machine main bodies of various sizes. Before placing the object on the first conveyor belt, the driving mechanism can drive the two limiting plates and the guide plate to slide to a certain position on the bracket in opposite or opposite directions according to the size of the object. This facilitates the positioning and centering of the object, ensuring that the object is not easily deviated when it is conveyed on the first conveyor belt to the placement roller for laminating processing. This improves the laminating processing efficiency and effect, avoids laminating failure and increased processing costs, and improves the feeding effect of the first conveyor belt. Attached Figure Description

[0023] The present invention will be further described below with reference to the accompanying drawings and embodiments.

[0024] Figure 1 This is a schematic diagram of the structure of this utility model.

[0025] Figure 2 This is a three-dimensional structural diagram of the bracket of this utility model;

[0026] Figure 3 for Figure 2 An enlarged 3D structural diagram at point A in the middle;

[0027] Figure 4 This is a flowchart of the intelligent control process of this utility model.

[0028] Legend: 1. Laminating machine body; 2. Limiting device; 3. First round shaft; 4. First conveyor belt; 5. First motor; 6. Control box; 7. Placement roller; 8. Second motor; 9. Limiting frame; 10. First electric telescopic rod; 11. Cutting knife; 12. Second electric telescopic rod; 13. Push rod; 14. Second round shaft; 15. Second conveyor belt; 16. Third motor; 21. Support; 22. Drive mechanism; 221. Third electric telescopic rod; 222. U-shaped block; 223. Connecting rod; 224. Reinforcing rod; 23. Limiting plate; 24. Guide plate; 25. Round roller; 26. Adjusting mechanism; 261. Screw hole operating rod; 262. Threaded groove; 263. Bolt; 264. Connecting rope; 265. Bearing. Detailed Implementation

[0029] The present invention will now be described in further detail with reference to the accompanying drawings. These drawings are simplified schematic diagrams, illustrating only the basic structure of the present invention, and therefore only show the components relevant to the present invention.

[0030] In the description of this utility model, it should be noted that, unless otherwise explicitly specified and limited, the terms "connected" and "linked" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium. Those skilled in the art can understand the specific meaning of the above terms in this utility model based on the specific circumstances.

[0031] Figure 1-4The balanced feeding device for a laminating machine shown includes a laminating machine body 1 and two first conveyor belts 4. A control box 6 is located on one side of the laminating machine body 1. Several first round shafts 3 are symmetrically installed through the inner wall of the laminating machine body 1. The two first conveyor belts 4 are respectively sleeved on the outer surfaces of two opposing first round shafts 3. A first motor 5 is symmetrically fixedly installed on one side of the laminating machine body 1. The output end of the first motor 5 is fixedly installed on one side of one of the first round shafts 3 via a coupling. A placement roller 7 is installed through the inner wall of the laminating machine body 1. A second motor 8 is fixedly installed on one side of the laminating machine body 1. The output end of the second motor 8 is fixedly installed on one side of the placement roller 7 via a coupling. The placement roller 7 is positioned between the two first conveyor belts 4. A first electric telescopic rod 10 is fixedly installed on one side of the inner wall of the laminating machine body 1. A cutting blade 11 is fixedly installed on the output rod of the first electric telescopic rod 10. A second round shaft is symmetrically installed through the inner wall of the laminating machine body 1. 14. A second conveyor belt 15 is fitted onto the outer surface of the second round shaft 14. A third motor 16 is fixedly installed on one side of the laminating machine body 1. The output end of the third motor 16 is fixedly installed on one side of one of the second round shafts 14 via a coupling. A cutting blade 11 is positioned between the second conveyor belt 15 and the first conveyor belt 4. A second electric telescopic rod 12 is fixedly installed on both sides of the third conveyor belt on the inner wall of the laminating machine body 1. A push rod 13 is fixedly installed on the output rod of the second electric telescopic rod 12. A limit frame 9 is symmetrically arranged on the top of the laminating machine body 1. A limit device 2 is set at the end of the first conveyor belt 4 away from the second conveyor belt 15. The limit device 2 can center and limit the object placed on the first conveyor belt 4 through two limit plates 23 and two guide plates 24, and position the conveying position of the object so that the object is in the center position before being fed to the placement roller 7 for laminating processing and is not prone to displacement.When using a laminating machine to laminate the bottom of an object, first, a laminating roll with adhesive is mounted on the placement roller 7. Then, the object is placed on one of the first conveyor belts 4. The control box 6 operates, and its internal control module activates the limit device 2 to center the object to be laminated. Then, the control module activates one of the first motors 5, which drives one of the first shafts 3 to rotate, thus conveying the object onto the first conveyor belt 4. When the object is conveyed between two first conveyor belts 4, the adhesive film on the placement roller 7 is adhered to the bottom of the foam. Simultaneously, the control module activates a second motor 8, which drives the placement roller 7 to unwind the laminating roll. The object is then conveyed to the other first conveyor belt. The object is fed onto conveyor belt 4, and simultaneously another first conveyor belt 4 is started, driving the first circular shaft 3 to rotate, thereby driving the other first conveyor belt 4 to continue conveying the object with the film to the cutting blade 11. Then, the first electric telescopic rod 10 is started through the control module, driving the cutting blade 11 to cut the film. The cut film-coated object is then conveyed to the second conveyor belt 15. At this time, the third motor 16 on the main body 1 of the laminating machine drives the second circular shaft 14 to rotate, moving the second conveyor belt 15, so that the film-coated object is conveyed to the push rod 13. Then, the second electric telescopic rod 12 is started, causing the push rod 13 to push the film extending from both sides of the object upward, so that the film finally adheres to both sides of the object. Then, the second conveyor belt 15 conveys the film-coated object out of the main body 1 of the laminating machine, thus completing the laminating process. It should be noted that the control box 6 is a mature technology and equipment in the prior art, and its internal structure, connection method and principle will not be described further.

[0032] Figure 1-4The limiting device 2 shown includes a bracket 21 and two guide plates 24, wherein both ends of the bracket 21 are fixedly installed on one side of the main body 1 of the film coating machine; two limiting plates 23, wherein one side of the limiting plate 23 abuts against one side of the first conveyor belt 4, and the inner wall of the other end is slidably installed on the outer surface of the bracket 21; a driving mechanism 22, wherein the driving mechanism 22 is disposed between one side of the bracket 21 and the two limiting plates 23, and is used to adjust and limit the limiting distance between the two limiting plates 23; and an adjusting mechanism 26, wherein the adjusting mechanism 26 is disposed between the limiting plate 23 and the guide plate 24, and is used to adjust the angle of inclination of the guide plate 24 on the limiting plate 23. After the bracket 21 is welded and installed on the main body 1 of the laminating machine, the tilt angle of the guide plate 24 on the limiting plate 23 can be manually adjusted by the adjusting mechanism 26 according to the size of the main body 1 of the laminating machine. This facilitates the adaptation of laminating machine main bodies 1 of various sizes. Before placing the object on the first conveyor belt 4, the driving mechanism 22 can drive the two limiting plates 23 and the guide plate 24 to slide in opposite directions on the bracket 21 to a certain position according to the size of the object. This facilitates the positioning and centering of the object, ensuring that the object is not easily deviated when it is conveyed on the first conveyor belt 4 to the placement roller 7 for laminating, improving the laminating efficiency and effect, avoiding laminating failure and increasing processing costs, and improving the feeding effect of the first conveyor belt 4. Several circular rollers 25 are rotatably installed on one side of the limiting plate 23 and the guide plate 24, and the circular rollers 25 are arranged at equal intervals. By setting the roller 25, the contact friction between the object and the guide plate 24 and the limiting plate 23 can be reduced, which facilitates the conveying of the object and does not hinder its positioning and centering.

[0033] Figure 1-4The drive mechanism 22 shown includes a third electric telescopic rod 221, one end of which is fixedly mounted on one side of the bracket 21; a U-shaped block 222, one side of which is fixedly mounted on the output rod side of the third electric telescopic rod 221; and two connecting rods 223, the two ends of which are respectively rotatably mounted in the inner wall of the U-shaped block 222 and the inner wall of one end of the two limiting plates 23. By setting up the drive mechanism 22, when it is necessary to adjust the distance between the two limiting plates 23 according to the size of the object, the third electric telescopic rod 221 can be activated to retract, causing the U-shaped block 222 to move upward. Under the pull of the connecting rods 223, the two limiting plates 23 can slide in opposite directions on the bracket 21. Similarly, the opposite operation can cause the two limiting plates 23 to slide in opposite directions, enabling them to center and position objects of different sizes. Several reinforcing rods 224 are fixedly installed on the outer surface of the output rod of the third electric telescopic rod 221, and one side of the reinforcing rod 224 is fixedly installed on one side of the U-shaped block 222. By setting the reinforcing rods 224, the connection area between the outer surface of the output rod of the third electric telescopic rod 221 and the U-shaped block 222 can be increased, making the connection more firm and stable.

[0034] Figure 1-4 The adjustment mechanism 26 shown includes a screw-hole operating rod 261, one end of which passes through one side of the limiting plate 23 and is fixedly installed on one side of the guide plate 24. The limiting plate 23 has several threaded grooves 262 on one side. A bolt 263 is also included, one end of which is screwed into the inner wall of one end of the screw-hole operating rod 261 and the inner wall of the threaded groove 262. After the bracket 21 is welded onto the laminating machine body 1, the screw-hole operating block can be manually held and rotated on the limiting plate 23 to a certain angle, according to the size of the laminating machine body 1. This rotates the guide plate 24 on the limiting plate 23 to a certain angle, facilitating adaptation to the corresponding laminating machine body 1. Then, the bolt 263 is screwed into the inner wall of the screw-hole operating rod 261 and the corresponding threaded groove 262 to fix it in place. This allows for maximum flow guidance and centering of the object in conjunction with the laminating machine body 1.

[0035] Figure 1-4A connecting rope 264 is fixedly installed on one side of the bolt 263, and one end of the connecting rope 264 is fixedly installed on one side of the threaded hole operating rod 261. By setting the connecting rope 264, the bolt 263 can be limited to one side of the threaded hole operating rod 261, making it less likely to be lost after being spirally removed from the threaded groove 262 and the inner wall of the threaded hole operating rod 261. A bearing 265 is fixedly installed on the outer surface of one end of the threaded hole operating rod 261, and the outer ring of the bearing 265 is fixedly installed on one side of the limiting plate 23. By setting the bearing 265, the rotational wear between the threaded hole operating rod 261 and the limiting plate 23 can be reduced, facilitating rotational adjustment and improving the service life of both.

[0036] Working principle: After the bracket 21 is welded and installed on the main body 1 of the laminating machine, the screw hole operating block can be manually held and rotated on the limiting plate 23 to a certain angle according to the size of the main body 1 of the laminating machine. This will drive the guide plate 24 to rotate on the limiting plate 23 to a certain angle, so as to adapt to the corresponding laminating machine main body 1. Then, the bolt 263 is screwed into the inner wall of the screw hole operating rod 261 and the corresponding thread groove 262 to fix it. When using a laminating machine to laminate the bottom of an object, the laminating roll with adhesive is first installed on the placement roller 7, and then the object is placed on one of the first conveyor belts 4. Depending on the size of the object, the control box 6 is operated to activate the internal control module, which retracts the third electric telescopic rod 221, causing the U-shaped block 222 to move upward. Under the pull of the connecting rod 223, the two limiting plates 23 can slide in opposite directions on the bracket 21, facilitating the positioning and centering of the object. This ensures that the object is not easily shifted when it is conveyed from the first conveyor belt 4 to the placement roller 7 for lamination, improving the efficiency and effect of lamination, avoiding lamination failure and increased processing costs, and improving the feeding effect of the first conveyor belt 4. Then, controlled by the control module, one of the first motors 5 is started, driving one of the first cylindrical shafts 3 to rotate, which in turn drives the first conveyor belt 4 to transport the object. When the object is transported between the two first conveyor belts 4, the film with adhesive on the placement roller 7 is adhered to the bottom of the foam. At the same time, the control module starts the second motor 8, which drives the placement roller 7 to rotate and unwind the coated roll. The object is then transported to the other first conveyor belt 4, which is then started, driving the first cylindrical shaft 3 to rotate, thus driving the other first conveyor belt 4 to continue transporting the coated object. The film is cut by the cutting blade 11. The first electric telescopic rod 10 is activated by the control module, which drives the cutting blade 11 to cut the film. The cut film is then conveyed to the second conveyor belt 15. At this time, the third motor 16 on the main body 1 of the laminating machine drives the second shaft 14 to rotate and the second conveyor belt 15 to move, so that the film is conveyed to the push rod 13. Then the second electric telescopic rod 12 is activated, which pushes the film extending from both sides of the film upward, so that the film finally adheres to both sides of the film. Then the second conveyor belt 15 conveys the film out of the main body 1 of the laminating machine, thus completing the laminating process.

[0037] Based on the above-described preferred embodiments of this utility model, and through the foregoing description, those skilled in the art can make various changes and modifications without departing from the technical concept of this utility model. The technical scope of this utility model is not limited to the contents of the specification, but must be determined according to the scope of the claims.

Claims

1. A balanced feeding device for a film laminating machine, comprising a film laminating machine body (1) and two first conveyor belts (4), characterized in that: A control box (6) is provided on one side of the main body (1) of the laminating machine. Several first round shafts (3) are symmetrically installed through the inner wall of the main body (1). Two first conveyor belts (4) are respectively sleeved on the outer surface of two opposite first round shafts (3). A first motor (5) is symmetrically fixedly installed on one side of the main body (1). The output end of the first motor (5) is fixedly installed on one side of one of the first round shafts (3) by means of a coupling. A placement roller (7) is installed through the inner wall of the main body (1). A second motor (8) is fixedly installed on one side of the film machine body (1). The output end of the second motor (8) is fixedly installed on one side of the placement roller (7) by means of a coupling. The placement roller (7) is arranged between two first conveyor belts (4). A first electric telescopic rod (10) is fixedly installed on one side of the inner wall of the film machine body (1). A cutting blade (11) is fixedly installed on the output rod of the first electric telescopic rod (10). A second round shaft (14) is symmetrically installed through the inner wall of the film machine body (1). The outer surface of the second round shaft (14) A second conveyor belt (15) is installed on the surface of the laminating machine. A third motor (16) is fixedly installed on one side of the laminating machine body (1). The output end of the third motor (16) is fixedly installed on one side of one of the second round shafts (14) by means of a coupling. The cutting blade (11) is located between the second conveyor belt (15) and the first conveyor belt (4). A second electric telescopic rod (12) is fixedly installed on both sides of the third conveyor belt on the inner wall of the laminating machine body (1). A push rod (1) is fixedly installed on the output rod of the second electric telescopic rod (12). 3) A limiting frame (9) is symmetrically arranged on the top of the main body (1) of the laminating machine. A limiting device (2) is arranged at the end of the first conveyor belt (4) away from the second conveyor belt (15). The limiting device (2) can center the object placed on the first conveyor belt (4) by two limiting plates (23) and two guide plates (24), and position the conveying position of the object so that the object is in the center position before it is fed to the placement roller (7) for laminating processing and is not prone to deviation.

2. The balanced feeding device for a film laminating machine according to claim 1, characterized in that: The limiting device (2) includes a bracket (21) and two guide plates (24), wherein both ends of the bracket (21) are fixedly installed on one side of the main body (1) of the film covering machine; Two limiting plates (23), one side of the limiting plate (23) abuts against one side of the first conveyor belt (4), and the inner wall of the other end is slidably mounted on the outer surface of the bracket (21); The drive mechanism (22) is located on one side of the bracket (21) and between the two limiting plates (23) for adjusting the limiting distance between the two limiting plates (23); Adjustment mechanism (26), wherein the adjustment mechanism (26) is disposed between the limiting plate (23) and the guide plate (24), and is used to adjust the angle of the guide plate (24) tilting on the limiting plate (23).

3. The balanced feeding device for a film laminating machine according to claim 2, characterized in that: Several circular rollers (25) are rotatably mounted on one side of the limiting plate (23) and the guide plate (24), and the several circular rollers (25) are arranged at equal distances.

4. The balanced feeding device for a film laminating machine according to claim 2, characterized in that: The drive mechanism (22) includes a third electric telescopic rod (221), wherein one end of the third electric telescopic rod (221) is fixedly installed on one side of the bracket (21); U-shaped block (222), wherein one side of U-shaped block (222) is fixedly installed on the output rod side of the third electric telescopic rod (221); Two connecting rods (223), the two ends of which are respectively rotatably installed in the inner wall of the U-shaped block (222) and the inner wall of one end of the two limiting plates (23).

5. The balanced feeding device for a film laminating machine according to claim 4, characterized in that: The outer surface of the output rod of the third electric telescopic rod (221) is fixedly equipped with several reinforcing rods (224), and one side of the reinforcing rod (224) is fixedly installed on one side of the U-shaped block (222).

6. The balanced feeding device for a film laminating machine according to claim 2, wherein: The adjustment mechanism (26) includes a screw hole operating rod (261), wherein one end of the screw hole operating rod (261) passes through one side of the limiting plate (23) and is fixedly installed on one side of the guide plate (24), and a plurality of threaded grooves (262) are provided on one side of the limiting plate (23). Bolt (263), one end of which is helically inserted into the inner wall of one end of the screw hole operating rod (261) and the inner wall of the threaded groove (262).

7. The balanced feeding device for a film laminating machine according to claim 6, characterized in that: A connecting rope (264) is fixedly installed on one side of the bolt (263), and one end of the connecting rope (264) is fixedly installed on one side of the screw hole operating rod (261).

8. The balanced feeding device for a film laminating machine according to claim 6, characterized in that: A bearing (265) is fixedly installed on the outer surface of one end of the screw hole operating rod (261), and the outer ring of the bearing (265) is fixedly installed on one side of the limiting plate (23).

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