Film coating method and film coating system

Abstract

The present disclosure provides a film covering method and a film covering system, and relates to the technical field of glass production. The film covering method comprises: conveying a plurality of pieces to be covered with film; making the pieces to be covered with film enter a film pasting area one by one, and performing a film pasting operation on the pieces to be covered with film; and then making two pieces to be covered with film enter a cutting area, and performing a cutting operation on the film between the two pieces to be covered with film; wherein the distance between the two pieces to be covered with film when the cutting operation is performed is greater than the distance between the two pieces to be covered with film when the film pasting operation is performed. The technical scheme of the present application can tension the film by expanding the distance between the two pieces to be covered with film when cutting, thereby solving the technical problems that, in the prior art, the film is not tensioned when cutting the film, the cutting of the cutting knife is affected, and the film on the surface of the piece to be covered with film has many wrinkles, thereby affecting the protection effect and the appearance flatness.

Description

Technical Field

[0001] This disclosure relates to the field of glass production technology, and in particular to a coating method and coating system. Background Technology

[0002] Float glass needs to be covered with a film during storage and transportation to ensure it is not contaminated or damaged by impact.

[0003] To achieve rapid coating and improve production efficiency, existing coating equipment uses a conveyor belt to transport glass sheets. While the glass is being transported, a coating device applies a film to the surface of the glass sheet. At this time, the films on the surfaces of each glass sheet are connected together. The glass is then transported again, and a cutting device cuts the films between adjacent glass sheets to complete the coating operation.

[0004] However, in actual production, the gap between each glass plate remains constant. When the film is cut by the cutting device before two adjacent glass plates are cut, the film is not effectively tensioned. This not only affects the cutting operation of the cutter in the cutting device, but also leaves wrinkles on the film surface of the glass plate, affecting the protective effect of the film and the appearance of the glass plate. Summary of the Invention

[0005] One of the technical problems to be solved by this disclosure is: how to tension the film when cutting the film between two adjacent glass plates to ensure the normal cutting of the cutting device and avoid leaving a large number of wrinkles on the surface of the glass plate due to the film not being tensioned.

[0006] To solve the above-mentioned technical problems, Embodiment 1 of this disclosure provides a coating method, which includes: transferring a plurality of parts to be coated;

[0007] One by one, the parts to be coated are brought into the film application area, and the film is applied to the parts to be coated.

[0008] Next, bring the two pieces to be coated into the cutting area and cut the film between the two pieces.

[0009] In particular, the distance between the two parts to be covered during the cutting operation is greater than the distance between the two parts to be covered during the film pasting operation.

[0010] In some embodiments, prior to the cutting operation of the film between the two pieces to be coated, the method further includes:

[0011] Stop one of the pieces to be coated located at the rear of the cutting area along the transport direction, and move the other piece to be coated located at the front of the cutting area along the transport direction by a preset distance.

[0012] In some embodiments, a method for bringing the part to be coated into the cutting area includes:

[0013] The first and second conveying units respectively convey the next piece to be coated and the previous piece to be coated along the conveying direction, and when the first conveying unit stops conveying, the second conveying unit runs for a preset time.

[0014] In some embodiments, the method of bringing the part to be coated into the cutting area further includes:

[0015] When transporting pieces of different lengths to be coated, the respective transport areas of the first transport section and the second transport section can be adjusted so that when the length of the piece to be coated changes, the two pieces to be coated in the cutting area can still be located in the transport areas of the first transport section and the second transport section, respectively.

[0016] In some embodiments, a method for applying a film to a workpiece to be coated includes:

[0017] At the same time, the film is pasted on the top and bottom sides of the part to be coated, and the film is pressed tightly to the part to be coated.

[0018] In some embodiments, the method for applying a film to the part to be coated further includes:

[0019] While the film is being adhered to the surface of the part to be coated, the tension of the film remains constant.

[0020] In some embodiments, methods for maintaining constant tension of the film include:

[0021] A first torque opposite to the direction of rotation of the film roll is applied to the film roll on which the film is placed. The first torque varies with the diameter of the film roll so that the torque pulling the film remains constant.

[0022] In some embodiments, the formula for calculating the first torque is:

[0023] F3 = {F1 × (R1 - N1 × H1)} / R3;

[0024] In the formula, F3 is the first torque;

[0025] F1 is the tension of the thin film;

[0026] N1 is the number of rotations of the film roll;

[0027] R1 is the initial radius of the film roll;

[0028] H1 is the thickness of the film;

[0029] R3 is the equivalent radius of the first torque.

[0030] In some embodiments, a method for cutting the film between two pieces to be coated includes:

[0031] Simultaneously, the film at the first position and the film at the second position are cut;

[0032] The first position is the rear side of the part to be coated along the forward direction in the cutting area, and the second position is the front side of the part to be coated along the rear direction in the cutting area.

[0033] Embodiment 2 of this disclosure provides a coating system, including:

[0034] The drive unit is used to transport the parts to be coated;

[0035] The identification unit is located on the front side of the drive unit along its transmission direction. The identification unit includes: multiple photoelectric identification units, which are used to detect the position and length of the workpiece to be coated.

[0036] The film application section includes an upper roller and a lower roller, which are used to apply and press the film onto the upper and lower surfaces of the part to be coated, respectively; and

[0037] The cutting section includes two cutting blades spaced apart along the conveying direction, the height, position, and relative distance of the two cutting blades along the conveying direction being adjustable; and

[0038] The control unit is electrically connected to the drive unit, the recognition unit, the film application unit, and the cutting unit.

[0039] In some embodiments, the driving unit includes: a first trimming driving structure and a second trimming driving structure;

[0040] The first cutting drive structure and the second cutting drive structure are both located below the cutting section. A variable roller is provided between the first cutting drive structure and the second cutting drive structure. The variable roller can be connected to the first cutting drive structure via a first clutch or to the second cutting drive structure via a second clutch.

[0041] The first clutch and the second clutch are electrically connected to the control unit.

[0042] Through the above technical solution, the lamination method provided by this disclosure can first transfer the parts to be laminated to the lamination area for film lamination, and then transfer the parts to the cutting area for film cutting between adjacent parts. This can quickly complete the surface lamination operation of the parts to be laminated, effectively improving the production efficiency of the parts to be laminated. Moreover, when preparing to cut the film between two adjacent parts to be laminated in the cutting area, the distance between the two parts to be laminated is increased by a preset length compared to the distance during the previous film lamination operation. This allows the film between the two parts to be laminated to be further tensioned, ensuring that the cutting operation can be carried out smoothly, reducing the film around the surface of the parts to be laminated, ensuring the protective effect of the film, and improving the flatness of the appearance of the parts to be laminated. Attached Figure Description

[0043] To more clearly illustrate the technical solutions in the embodiments of this disclosure or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this disclosure. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0044] Figure 1 This is a schematic diagram of the structure of the coating system disclosed in the embodiments of this disclosure;

[0045] Figure 2 This is a schematic diagram of the force analysis for calculating the first torque disclosed in this embodiment.

[0046] Explanation of reference numerals in the attached figures:

[0047] 1. Drive unit; 11. First cutting drive structure; 12. Second cutting drive structure; 13. Variable roller; 14. First clutch; 15. Second clutch; 2. Identification unit; 21. Photoelectric identification unit; 3. Film application unit; 31. Upper roller; 32. Lower roller; 33. Film roll; 34. Torque motor; 4. Cutting unit; 41. Cutting knife. Detailed Implementation

[0048] The embodiments of this disclosure will be further described in detail below with reference to the accompanying drawings and examples. The detailed description of the embodiments and the accompanying drawings are used to illustrate the principles of this disclosure by way of example, but should not be used to limit the scope of this disclosure. This disclosure can be implemented in many different forms and is not limited to the specific embodiments disclosed herein, but includes all technical solutions falling within the scope of the claims.

[0049] These embodiments are provided to make the disclosure thorough and complete, and to fully express the scope of the disclosure to those skilled in the art. It should be noted that, unless otherwise specifically stated, the relative arrangement of components and steps, material composition, numerical expressions, and values ​​set forth in these embodiments should be interpreted as exemplary only and not as limiting.

[0050] It should be noted that, in the description of this disclosure, unless otherwise stated, "a plurality of" means two or more; the terms "upper," "lower," "left," "right," "inner," and "outer," etc., indicating orientation or positional relationship, are only for the convenience of describing this disclosure and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of this disclosure. When the absolute position of the described object changes, the relative positional relationship may also change accordingly.

[0051] Furthermore, the terms "first," "second," and similar terms used in this disclosure do not indicate any order, quantity, or importance, but are merely used to distinguish different parts. "Vertical" is not strictly vertical, but within the permissible margin of error. "Parallel" is not strictly parallel, but within the permissible margin of error. Terms such as "including" or "contains" mean that the element preceding the word encompasses the element listed after the word, and do not exclude the possibility of encompassing other elements as well.

[0052] It should also be noted that, in the description of this disclosure, unless otherwise expressly specified and limited, the terms "installed," "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 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 disclosure depending on the specific circumstances. When a particular device is described as being located between a first device and a second device, an intermediary device may or may not be present between the particular device and the first or second device.

[0053] All terms used in this disclosure have the same meaning as understood by one of ordinary skill in the art to which this disclosure pertains, unless otherwise specifically defined. It should also be understood that terms defined in general dictionaries should be interpreted as having meanings consistent with their meanings in the context of the relevant art, and not as idealized or highly formalized, unless expressly defined herein.

[0054] Techniques, methods, and equipment known to those skilled in the art may not be discussed in detail, but where appropriate, they should be considered part of the specification.

[0055] Example 1

[0056] Reference Appendix Figure 1 and attached Figure 2 Embodiment 1 of the present invention provides a coating method, which includes:

[0057] S1: Transfer multiple items to be coated;

[0058] Specifically, the parts to be coated can be float glass. In the manufacturing of float glass cover plates, float glass needs to be coated during transportation and storage to ensure that it is not contaminated or impacted, thus protecting it. Multiple parts to be coated can be transported via a horizontal conveyor unit, allowing the parts to be laid flat on the conveyor unit and moved horizontally one by one.

[0059] S2: Allow the parts to be coated to enter the film application area one by one, and perform the film application operation on the parts to be coated;

[0060] Specifically, the parts to be coated can enter the film application area one by one. The film application area is the space where the film application unit 3 performs the film application operation. The film application unit 3 can apply the film to the surface of the parts to be coated. The film application unit 3 can be two round rollers arranged one above the other. The two round rollers can pull the film out from the film roll 33 and stick it firmly to the surface of the parts to be coated. The round rollers can move and transport the parts to be coated while applying the film, without affecting the normal movement of the parts to be coated, effectively improving the application efficiency. Moreover, the two round rollers can apply the film to the upper and lower surfaces of the parts to be coated at the same time, which can greatly improve the coating efficiency.

[0061] S3: Then bring the two pieces to be coated into the cutting area and cut the film between the two pieces to be coated.

[0062] Specifically, after the film is pasted onto the surface of the parts to be coated, the parts to be coated are continued to be transported by the conveyor and moved to the cutting area. The cutting area is the space where the cutting unit 4 cuts the film between two parts to be coated, i.e., the cutting operation is performed. Two parts to be coated can enter the cutting area at a time. After the two parts to be coated are moved to the area directly below the cutter 41 of the cutting unit 4, the movement is stopped. Then the film between the two parts to be coated is cut off by the cutter 41 to prevent the film from sticking between the parts to be coated.

[0063] By moving the parts to be coated and continuously attaching the film to the surface of the parts, and finally interrupting the film between the parts, the coating operation can be completed quickly. The coated parts can then be moved to the storage area and stored in the storage equipment for processing in the next process. The coating operation proposed in this application uses machinery to replace manual pasting and cutting, which can effectively improve production efficiency.

[0064] In particular, the distance between the two parts to be covered during the cutting operation is greater than the distance between the two parts to be covered during the film pasting operation.

[0065] Specifically, during the cutting operation, when two parts to be coated enter the cutting area but the cutter 41 has not yet cut the film, the distance between the two parts to be coated, i.e., the gap between them along the transport direction, is increased. At this time, the distance between the two parts to be coated is increased by a preset length compared to the distance between them when the film is pasted in the film application area. The preset length can be adjusted according to the tension of the specific film, so that the film can be taut without breaking. By increasing the distance between the two parts to be coated, the film between them can be taut. The film is then cut by the cutting unit 4 while in a taut state, which ensures that the cutter 41 can cut the film smoothly. Furthermore, the film can be tensioned again before the final coating operation is completed, minimizing wrinkles on the surface of the parts to be coated, ensuring the appearance of the parts to be coated, and ensuring the protective function of the film.

[0066] Based on the above, embodiments of the present invention propose a lamination method. First, the parts to be laminated are transferred to a lamination area where a film is applied. Then, the parts are transferred to a cutting area where the film between adjacent parts is cut. This allows for rapid completion of the surface lamination process, effectively improving production efficiency. Furthermore, when preparing to cut the film between two adjacent parts in the cutting area, the distance between them is increased by a predetermined length compared to the distance during the initial film application. This allows for further tension of the film between the parts, ensuring smooth cutting and reducing film overlap on the surface of the parts, thus maintaining the protective effect and improving the smoothness of the laminated surface.

[0067] Reference Appendix Figure 1 In practice, before cutting the film between the two parts to be coated, the following steps are also included:

[0068] Stop one of the pieces to be coated located at the rear of the cutting area along the transport direction, and move the other piece to be coated located at the front of the cutting area along the transport direction by a preset distance.

[0069] Specifically, before cutting the film between two items to be coated, it is necessary to control the movement of these two items in the cutting area. Specifically, after the two items move directly below the cutting device, the item further back in the transport direction stops moving, while the item further forward continues to move a preset distance, increasing the distance between them by a preset distance. This preset distance can be adjusted according to the film tension to ensure the film between the two items is taut but not torn. By stopping the latter item and then continuing to move the former item a preset distance, the bonding efficiency is ensured while the film between the two items to be coated is taut, ensuring the cutting operation can proceed smoothly. Further tautness of the film improves the flatness of the surface of the items to be coated, ensuring the protective effect of the film.

[0070] Reference Appendix Figure 1 In practice, methods for bringing the part to be coated into the cutting area include:

[0071] The first and second conveying units respectively convey the next piece to be coated and the previous piece to be coated along the conveying direction, and when the first conveying unit stops conveying, the second conveying unit runs for a preset time.

[0072] Specifically, the method for bringing the parts to be coated into the cutting area includes: using two separate conveying units, namely a first conveying unit and a second conveying unit, to respectively transport the latter and the former of two adjacent parts to be coated in the cutting area. Before the first conveying unit moves the latter part to a preset position and prepares to start the cutting operation, the second conveying unit can run for a preset time, so that after the latter part stops moving along the conveying direction, the former part can still move a preset distance to tension the film between the two parts to be coated. By controlling the delayed stopping of the first and second conveying units, the distance between the two adjacent parts to be coated can be effectively increased, and the film in the middle can be tensioned quickly and easily, making it faster and more efficient.

[0073] Reference Appendix Figure 1 In specific implementation, methods for bringing the part to be coated into the cutting area also include:

[0074] When transporting pieces of different lengths to be coated, the respective transport areas of the first transport section and the second transport section can be adjusted so that when the length of the piece to be coated changes, the two pieces to be coated in the cutting area can still be located in the transport areas of the first transport section and the second transport section, respectively.

[0075] Specifically, in the method for bringing the workpiece to be coated into the cutting area, the structure allows for adjustment of the lengths of the conveying areas of the first and second conveying units. By extending the length of the first conveying unit's conveying area and shortening the length of the second conveying unit's conveying area, it can accommodate longer workpieces to be coated. This ensures that after the workpieces to be coated further back in the first conveying unit stop moving, the entire workpiece remains within the conveying area of ​​the first conveying unit and does not extend into the conveying area of ​​the second conveying unit, thus not affecting the second conveying unit's continued conveying of workpieces to be coated further forward. Furthermore, by shortening the length of the first conveying unit's conveying area and extending the length of the second conveying unit's conveying area, the workpiece can be extended further. The length of the conveying area of ​​the first conveyor can accommodate shorter pieces to be coated. After the pieces to be coated at the rear of the first conveyor stop moving, the pieces to be coated at the front can move to the conveying area of ​​the second conveyor. The second conveyor can then continue to move a preset distance. By controlling the relative length of the conveying areas of the first and second conveyors, it is possible to accommodate pieces to be coated of different lengths. Coating operations can be performed on pieces to be coated of different lengths simultaneously without prior sorting or purchasing equipment of corresponding specifications. This not only improves coating efficiency but also saves on production equipment costs.

[0076] Reference Appendix Figure 1 In practice, the methods for applying a film to the parts to be coated include:

[0077] At the same time, the film is pasted on the top and bottom sides of the part to be coated, and the film is pressed tightly to the part to be coated.

[0078] Specifically, the method for applying the film to the parts to be coated includes: simultaneously applying the film to the top and bottom sides of the parts to be coated, which are the two sides that need to be protected by the film, and pressing the film firmly to the parts to be coated at the same time to reduce wrinkles, ensure the protective effect of the film, and improve the flatness of the appearance of the parts to be coated. Specifically, two rollers, one above the other, are used, with the gap between the two rollers adapted to the thickness of the parts to be coated. The surfaces of the two rollers are covered with rubber or silicone, etc. The two rollers pull the film from the two film rolls 33 respectively for the application and pressing operation.

[0079] Reference Appendix Figure 1 In specific implementation, the methods for applying a film to the parts to be coated also include:

[0080] While the film is being adhered to the surface of the part to be coated, the tension of the film remains constant.

[0081] Specifically, when the roller pulls the film out of the film roll 33 and performs the film bonding operation on the surface of the part to be coated, the tension of the pulled film can be kept constant, which can improve the coating effect when the roller performs the film bonding operation.

[0082] Reference Appendix Figure 1 and attached Figure 2 In practical implementation, methods for maintaining constant film tension include:

[0083] A first torque opposite to the rotation direction of the film roll 33 is applied to the film roll 33 on which the film is placed. The first torque varies with the diameter of the film roll 33 so that the torque pulling the film remains constant.

[0084] Specifically, a torque motor 34 can be installed in the axis of the film roll 33. The torque motor 34 can rotate in the opposite direction to the rotation direction of the film roll 33 to apply a first torque to the film roll 33. The torque of the torque motor 34 can be adjusted by adjusting the current so that the first torque applied by the torque motor 34 to the film roll 33 can change with the thickness of the film roll 33, so that the force of the roller pulling the film remains constant.

[0085] Reference Appendix Figure 2 In practical implementation, the formula for calculating the first torque is:

[0086] F3 = {F1 × (R1 - N1 × H1)} / R3;

[0087] In the formula, F3 is the first torque;

[0088] F1 is the tension of the thin film;

[0089] N1 is the number of rotations of the film roll 33;

[0090] R1 is the initial radius of the film roll 33;

[0091] H1 is the thickness of the film;

[0092] R3 is the equivalent radius of the first torque.

[0093] Specifically, the first torque can be calculated. In practice, the first torque can be calculated in real time by the controller, and then the current input of the torque motor 34 can be controlled to make the torque output by the torque motor 34 equal to the first torque. In the calculation formula of the first torque, the product of the first torque and the equivalent radius of the first torque is equal to the product of the film tension and the actual radius of the film roll 33. The actual radius of the film roll 33 decreases with the use of the film. By multiplying the thickness of the film by the number of turns of the film roll 33 already used, the radius of the film roll 33 that decreases with use can be obtained. Then, by subtracting the reduced radius from the initial radius of the film roll 33, the actual radius of the film roll 33 can be obtained. By changing the input current of the torque motor 34, the first torque can be made to change with the actual radius of the film roll 33, that is, the tension of the film can be kept constant.

[0094] Reference Appendix Figure 1In practice, the methods for cutting the film between two parts to be coated include:

[0095] Simultaneously, the film at the first position and the film at the second position are cut;

[0096] The first position is the rear side of the part to be coated along the forward direction in the cutting area, and the second position is the front side of the part to be coated along the rear direction in the cutting area.

[0097] Specifically, the method for cutting the film between two pieces to be coated includes: simultaneously cutting the film at the first position and the second position in the film area, so that the film at the rear side of the piece to be coated further forward and the front side of the piece to be coated further backward along the conveying direction can be cut at the same time. This not only completes the film cutting operation between the two pieces to be coated in one cut, but also makes the film at the edges of the two pieces to be coated with a certain distance between them smoother.

[0098] Example 2

[0099] Embodiment 2 of the present invention provides a coating system, which includes: a driving unit 1, the driving unit 1 being used to transport the workpiece to be coated;

[0100] The identification unit 2 is disposed on the front side of the drive unit 1 along its transmission direction. The identification unit 2 includes: a plurality of photoelectric identification units 21, which are used to detect the position and length of the workpiece to be coated.

[0101] Film application section 3 includes an upper roller 31 and a lower roller 32, which are respectively used to apply and press the film onto the upper and lower surfaces of the part to be coated; and

[0102] Cutting section 4 includes: two cutting blades 41 spaced apart along the conveying direction; the height, position along the conveying direction, and relative distance between the two cutting blades 41 are adjustable; and

[0103] The control unit is electrically connected to the drive unit 1, the identification unit 2, the film application unit 3, and the cutting unit 4, respectively.

[0104] Specifically, the lamination method proposed in this application can be implemented through a lamination system. The lamination system includes a drive unit 1, an identification unit 2, a film application unit 3, a cutting unit 4, and a control unit. The drive unit 1 can be multiple motors driving multiple horizontally arranged rollers, which move the workpiece to be laminated. The identification unit 2 includes multiple photoelectric sensors spaced apart. The photoelectric sensors can identify whether there is a workpiece to be laminated at various positions on the upper surface of the drive unit 1. When the workpiece to be laminated is placed in the drive unit 1 but has not yet reached the area of ​​the film application unit 3, the photoelectric sensors connected to the controller can determine the length and position of the workpiece to be laminated, and then control other components to operate the workpiece to be laminated. The film application unit 3 can include an upper roller 31 and a lower roller 32, which are distributed longitudinally and the longitudinal distance is adapted to the thickness of the workpiece to be laminated. The upper roller 31 and the lower roller 32 are connected to a film roll 33 to hold the film roll 33 in place. The film is pulled onto the surfaces of the upper roller 31 and the lower roller 32, allowing the upper roller 31 and the lower roller 32 to move the workpiece to be coated along the conveying direction while pressing and adhering the film to the surface of the workpiece. The detection unit includes two cutters 41, the distance between which can be adjusted so that the distance between the cutters 41 is the same as the distance between two adjacent workpieces to be coated in the cutting area. The cutters 41 are controlled by three screw structures, allowing the two cutters 41 to be adjusted in the horizontal and longitudinal directions perpendicular to the conveying direction for cutting operations. In specific cutting operations, the cutters 41 are positioned above the film. The two cutters 41 can be aligned with the film to be cut first, then the cutters 41 are lowered so that the blades of the cutters 41 are aligned with the film, and finally the cutters 41 are moved in the horizontal direction perpendicular to the conveying direction to cut the film. The control unit is electrically connected to the above components and can control the above components to realize the automatic coating operation of the workpiece.

[0105] Reference Appendix Figure 1 In a specific implementation, the drive unit 1 includes: a first cutting drive structure 11 and a second cutting drive structure 12;

[0106] The first cutting drive structure 11 and the second cutting drive structure 12 are both located below the cutting section 4. A variable roller 13 is provided between the first cutting drive structure 11 and the second cutting drive structure 12. The variable roller 13 can be connected to the first cutting drive structure 11 through the first clutch 14 or to the second cutting drive structure 12 through the second clutch 15.

[0107] The first clutch 14 and the second clutch 15 are electrically connected to the control unit.

[0108] Specifically, the drive unit 1 consists of multiple motors driving multiple circular rollers. The section located below the cutting unit 4 can be divided into a first cutting drive structure 11 and a second cutting drive structure 12. The first cutting drive structure 11 and the second cutting drive structure 12 are respectively equivalent to the first conveying unit and the second conveying unit mentioned above. The first cutting drive structure 11 and the second cutting drive structure 12 are each driven by two motors and can rotate independently. When the first cutting drive structure 11 stops conveying the parts to be coated, the second cutting drive structure 12 can still operate. Furthermore, one or more variable rollers 13 are provided between the first and second cutting structures. Each variable roller 13 is a circular roller that can rotate under the drive of the first cutting structure or under the drive of the second cutting structure. The variable roller 13 is connected to the first cutting drive structure 11 and the second cutting drive structure 12 via a first clutch 14 and a second clutch 15. The first clutch 14 and the second clutch 15 can be dry single-plate electromagnetic clutches or magnetic powder clutches, etc., and can be controlled by a control unit. When the first clutch 14 is engaged and the second clutch 15 is disengaged, the variable roller 13 rotates under the drive of the first cutting drive structure 11, increasing the length of the conveying area of ​​the first cutting drive structure 11 and decreasing the length of the conveying area of ​​the second cutting drive structure 12. When the first clutch 14 is disengaged and the second clutch 15 is engaged, the variable roller 13 rotates under the drive of the second cutting drive structure 12, decreasing the length of the conveying area of ​​the first cutting drive structure 11 and increasing the length of the conveying area of ​​the second cutting drive structure 12. Through the adjustable and independent first and second cutting drive structures 11 and 12, and in conjunction with the identification unit 2 for identifying the length of the workpiece to be coated, the coating system proposed in this application can adapt to workpieces of different lengths, allowing workpieces of different lengths to move away from each other below the cutting unit 4, thus tightening the film. This not only eliminates the need for pre-classification of workpiece size, increasing work efficiency, but also avoids the need to purchase corresponding equipment for workpieces of different sizes, saving production costs.

[0109] The embodiments of this disclosure have now been described in detail. To avoid obscuring the concept of this disclosure, some details known in the art have not been described. Those skilled in the art can fully understand how to implement the technical solutions disclosed herein based on the above description.

[0110] While specific embodiments of this disclosure have been described in detail by way of examples, those skilled in the art should understand that the examples are for illustrative purposes only and not intended to limit the scope of this disclosure. Those skilled in the art should understand that modifications can be made to the above embodiments or equivalent substitutions can be made to some technical features without departing from the scope and spirit of this disclosure. In particular, as long as there is no structural conflict, the technical features mentioned in the various embodiments can be combined in any manner.

Claims

1. A coating system, characterized in that, include: A drive unit (1) is used to transport the part to be coated; The identification unit (2) is disposed on the front side of the driving unit (1) along its transmission direction. The identification unit (2) includes: a plurality of photoelectric identification units (21). The photoelectric identification units (21) are used to detect the position of the piece to be coated and the length of the piece to be coated. The film-applying section (3) includes an upper roller (31) and a lower roller (32), which are respectively used to apply and press the film onto the upper and lower surfaces of the part to be coated; and The cutting section (4) includes two cutting blades (41) spaced apart along the transport direction. The height, position, and relative distance of the two cutting blades (41) along the transport direction are all adjustable. Different lengths of parts to be coated can move away from each other below the cutting section (4), thus tightening the film. The control unit is electrically connected to the drive unit (1), the identification unit (2), the film application unit (3), and the cutting unit (4), respectively. The drive unit (1) includes: a first cutting drive structure (11) and a second cutting drive structure (12); The first cutting drive structure (11) and the second cutting drive structure (12) are both located below the cutting part (4). A variable roller (13) is provided between the first cutting drive structure (11) and the second cutting drive structure (12). The variable roller (13) can be connected to the first cutting drive structure (11) through the first clutch (14) or to the second cutting drive structure (12) through the second clutch (15). The first clutch (14) and the second clutch (15) are electrically connected to the control unit.

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