Film application device and application method

Abstract

This application provides a film-applying device and a film-applying method using the film-applying device to improve the accuracy and efficiency of film application. The film-applying device includes: a turntable; a turntable drive unit connected to the turntable to drive the turntable to rotate; a first film-applying mechanism including a first transfer component, a first mounting base, and a positioning component, two suction components, and two sets of first film-applying components respectively disposed on the side of the first mounting base facing the turntable. The positioning component is retractably disposed on the first mounting base and is used to press the protective film against the top surface of the workpiece. The two suction components are symmetrically disposed on both sides of the positioning component. The first transfer component is connected to the first mounting base to drive the first mounting base to move. The two sets of first film-applying components are located between the two suction components and symmetrically disposed on both sides of the positioning component, and are used to roll and press the protective film along the direction from the top surface to the side surface of the workpiece; a second film-applying mechanism is used to roll and press the protective film against the two side surfaces of the workpiece; and a third film-applying mechanism is used to roll and press the protective film against the two end faces of the workpiece.

Description

Technical Field

[0001] This application relates to the field of automatic film application technology, specifically to a film application device and a film application method. Background Technology

[0002] When applying a protective film to a workpiece with a three-dimensional curved outer surface, the protective film is usually placed on the outer surface of the workpiece first, and then each part of the protective film is pressed sequentially by hand or with a special jig so that each part of the protective film is attached to the outer surface of the workpiece in sequence.

[0003] However, manual application of protective film is labor-intensive and inefficient. In addition, if the protective film is not pressed after being placed on the outer surface of the workpiece, it will move relative to the workpiece due to air flow or rotation with the workpiece, resulting in low application accuracy and misalignment of the applied protective film relative to the workpiece. Summary of the Invention

[0004] In view of the above, it is necessary to provide a film application device and a film application method to improve the efficiency and accuracy of film application.

[0005] This application provides a film-applying device for applying a protective film to the surface of a workpiece. The surface of the workpiece includes a top surface and two side surfaces and two end surfaces that are connected to the top surface and alternately arranged circumferentially along the top surface.

[0006] The film-applying device includes a turntable for carrying the workpiece and a turntable drive unit connected to the turntable. The turntable drive unit drives the turntable to rotate. The film-applying device also includes a first film-applying mechanism, a second film-applying mechanism, and a third film-applying mechanism arranged sequentially at intervals along the circumference of the turntable. The first film-applying mechanism includes a first transfer component, a first mounting base, a positioning component, two suction components, and two sets of first film-applying components disposed on the side of the first mounting base facing the turntable. The positioning component is retractably disposed on the first mounting base and is used to hold the protective film against the top surface of the workpiece. The two suction components are symmetrically disposed on both sides of the positioning component and are used to suction the two ends of the protective film. The first transfer component is connected to the first mounting base and is used to drive the first mounting base to move. The two sets of first film-applying components are located between the two suction components and are symmetrically disposed on both sides of the positioning component. They are used to roll and press the protective film against the top surface of the workpiece while the positioning component presses the protective film against the top surface of the workpiece, so that the protective film is attached to the two sides of the workpiece. The second film-applying mechanism is used to roll and press the protective film from one of the sides to the other side so that the protective film is attached to the two end faces of the workpiece, and the third film-applying mechanism is used to roll and press the protective film along the direction from the top surface of the workpiece to the two end faces of the workpiece.

[0007] In some embodiments, the positioning element includes:

[0008] The movable body includes a movable rod and a stop. The movable rod is movably inserted through the first mounting seat along the axial direction of the turntable. The stop is connected to the end of the movable rod away from the turntable and is located on the side of the first mounting seat opposite to the turntable, for supporting the first mounting seat.

[0009] A positioning body is connected to one end of the movable rod near the turntable. The side of the positioning body opposite to the movable rod is provided with a positioning surface that is adapted to the top surface. The positioning surface is used to press the protective film against the top surface of the workpiece.

[0010] An elastic body is sleeved on the movable rod, and both ends of the elastic body abut against the positioning body and the first mounting base, respectively.

[0011] In some embodiments, each group of the first film-applying components includes:

[0012] A rotating component is rotatably connected to the first mounting base;

[0013] A roller is rotatably connected to one end of the rotating component and is disposed between the positioning component and the adsorption component, for rolling and pressing against the protective film;

[0014] A pull drive is provided on the first mounting base and connected to the end of the rotating member away from the roller. The pull drive is used to drive the rotating member to move the roller closer to the positioning member when the positioning member presses against the protective film and the first mounting base moves toward the turntable, so that the roller rolls and presses against the protective film.

[0015] In some embodiments, the first transfer component includes:

[0016] The first film-applying bracket is disposed adjacent to the turntable;

[0017] A lifting drive unit, connected to the first mounting base, is used to drive the first mounting base closer to or further away from the turntable;

[0018] A horizontal drive component is disposed on the first film-applying bracket and connected to the lifting drive component, and is used to drive the lifting drive component to move horizontally.

[0019] In some embodiments, the second film-applying mechanism includes a second film-applying bracket, a second transfer assembly, and two sets of second film-applying assemblies. The second film-applying bracket is adjacent to the turntable, and the two sets of second film-applying assemblies are disposed on one side of the axial direction of the turntable. The second transfer assembly is disposed on the second film-applying bracket and connects the two sets of second film-applying assemblies, and is used to drive the two sets of second film-applying assemblies to rotate from one side to the other side, so that the two sets of second film-applying assemblies roll and press against the protective film.

[0020] In some embodiments, each group of second film-applying components includes a second mounting base and a roller connected to the second mounting base on the side facing the turntable. The second transfer assembly includes two transfer units, each transfer unit including a linkage, a roller, a transmission belt, and a rotary drive. The linkage passes through the second film-applying bracket along the axial direction of the turntable and is rotatably connected to the second film-applying bracket. One end of the linkage is connected to the second mounting base, and the other end of the linkage is connected to the roller. The transmission belt meshes with the roller. The rotary drive is disposed on the second film-applying bracket and meshes with the transmission belt, for driving the transmission belt to rotate the roller, so that the linkage drives the corresponding second mounting base to rotate from one side to the other side, thereby causing the roller to roll and press against the protective film.

[0021] In some embodiments, the connection between the top surface, side surface, and end surface of the workpiece forms a workpiece fillet. The third film-applying mechanism includes a third film-applying bracket, a pressing drive, a third mounting base, and two sets of third film-applying assemblies. The third film-applying bracket is adjacent to the turntable, and the third mounting base is located on one side of the axial direction of the turntable. The two sets of third film-applying assemblies are rotatably connected to the third mounting base. The pressing drive is located on the third film-applying bracket and connected to the third mounting base, and is used to drive the third mounting base closer to the turntable so that the two sets of third film-applying assemblies roll and press the protective film against the two workpiece fillets.

[0022] In some embodiments, the third mounting base has two limiting grooves, and each group of the third film application components includes:

[0023] The connector is rotatably connected to the third mounting base;

[0024] A pressure roller, connected to one end of the connector, is used to roll and press against the protective film;

[0025] A pressure-driving component is rotatably connected to the third mounting base and the connecting component, respectively, and is used to apply pressure to the connecting component from the third mounting base to the pressure roller;

[0026] A limiting member, one end of which is connected to the connecting member, and the other end of which is movably received in the limiting groove, so as to limit the rotation range of the connecting member relative to the third mounting base.

[0027] In some embodiments, the film application device further includes:

[0028] A feeding mechanism is disposed between the first film-applying mechanism and the third film-applying mechanism. The feeding mechanism includes a feeding bracket, a feeding roller, a plurality of guide rollers, a feeding drive, and a take-up roller disposed on the feeding bracket. The feeding roller is used to carry the material strip with the protective film attached. The take-up roller is connected to one end of the material strip. The plurality of guide rollers are respectively used to abut the side of the material strip away from the protective film. The feeding drive is connected to the take-up roller and is used to drive the take-up roller to rotate so that the material strip is conveyed under the guidance of the plurality of guide rollers.

[0029] This application also provides a film-applying method using the film-applying device described in the above embodiments, for applying a protective film to the surface of a workpiece. The surface of the workpiece includes a top surface and two side surfaces and two end surfaces that are connected to the top surface and alternately arranged circumferentially along the top surface. The film-applying method includes:

[0030] Place the workpiece onto the turntable of the film-applying device;

[0031] The first transfer component of the film-applying device drives two adsorption elements to adsorb the protective film, and moves the protective film to above the workpiece.

[0032] The first transfer component drives the positioning element of the film application device to hold the protective film against the top surface of the workpiece;

[0033] The first transfer component drives the two first film-applying components of the film-applying device to roll and press against the protective film along the direction from the top surface of the workpiece to the two sides, so that the protective film is attached to the two sides of the workpiece;

[0034] The turntable of the film-applying device is driven by the turntable drive component to rotate the workpiece with the protective film applied from the first film-applying mechanism of the film-applying device to the second film-applying mechanism of the film-applying device.

[0035] The second film-applying mechanism rolls and presses against the protective film from one side of the workpiece to the other side, so that the protective film is attached to the two end faces of the workpiece.

[0036] The turntable is driven by the turntable drive to rotate the workpiece with the protective film attached from the second film application mechanism to the third film application mechanism of the film application device;

[0037] The third film-applying mechanism rolls and presses against the protective film along the direction from the top surface of the workpiece to the two end faces of the workpiece.

[0038] In the aforementioned film-applying device and method, during the process of applying the protective film to the top and sides of the workpiece, the positioning component is always in a state of pressing the protective film against the top surface, which can prevent the protective film from moving relative to the workpiece before being applied, thereby improving the accuracy of film application. Furthermore, the first, second, and third film-applying mechanisms can work in conjunction with a turntable to sequentially apply the protective film to the top surface, two sides, and two end faces, resulting in continuous operation, low labor intensity, and thus improved film application efficiency. Attached Figure Description

[0039] Figure 1 This is a workpiece applicable to the film-applying device provided in the embodiments of this application.

[0040] Figure 2 This is a schematic diagram of the structure of the film-applying device, workpiece, material strip, and protective film in an embodiment of this application.

[0041] Figure 3 for Figure 2 The diagram shows the structure of the first film-applying mechanism in the film-applying device.

[0042] Figure 4 for Figure 3 An exploded view of the first film-applying mechanism is shown.

[0043] Figure 5 for Figure 2 The diagram shows the structure of the second film-applying mechanism in the film-applying device.

[0044] Figure 6 for Figure 2 The diagram shows the structure of the third film-applying mechanism in the film-applying device.

[0045] Figure 7 This is a schematic flowchart of the film application method according to an embodiment of this application.

[0046] Explanation of main component symbols

[0047]

[0048] Detailed Implementation

[0049] The embodiments of this application are described in detail below. Examples of these embodiments are shown in the accompanying drawings, wherein the same or similar reference numerals denote the same or similar elements or elements having the same or similar functions throughout. The embodiments described below with reference to the accompanying drawings are exemplary and are only used to explain this application, and should not be construed as limiting this application.

[0050] In the description of this application, it should be noted that, unless otherwise explicitly specified and limited, the term "connection" should be interpreted broadly. For example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection, an electrical connection, or a connection that allows communication between the components; it can be a direct connection or an indirect connection through an intermediate medium; it can be the internal communication between two components or the interaction between two components. Those skilled in the art can understand the specific meaning of the above terms in this application according to the specific circumstances.

[0051] The embodiments of this application will be described in detail below with reference to the accompanying drawings.

[0052] Please see Figure 1 , Figure 1 This is a workpiece applicable to the film-applying device provided in the embodiments of this application. Specifically, the workpiece 20 has a surface 20a (the outer surface of the workpiece 20), and the surface 20a of the workpiece 20 includes a top surface 20b and two side surfaces 20c and two end surfaces 20d that are connected to the top surface 20b and alternately arranged circumferentially along the top surface 20b. In this embodiment, the two side surfaces 20c are located at opposite ends of the top surface 20b, and each end surface 20d connects to the two side surfaces 20c. The workpiece 20 can be an earphone shell.

[0053] Please see Figure 2 The film-applying device 100 is used to apply a protective film 200 to the surface 20a of the workpiece 20. The film-applying device 100 includes a turntable 110, a turntable drive 120 connected to the turntable 110, and a feeding mechanism 130, a first film-applying mechanism 140, a second film-applying mechanism 150, and a third film-applying mechanism arranged sequentially at intervals along the circumference of the turntable 110. For example, the turntable drive 120 can be a motor.

[0054] Please see Figure 2 The turntable 110 is used to support the workpiece 20, and the turntable drive 120 is used to drive the turntable 110 to rotate. The axial direction of the turntable 110 is... Figure 2 In the vertical direction, the radial direction of turntable 110 is Figure 2 The horizontal direction in the middle.

[0055] Please see Figure 2The feeding mechanism 130 is located between the first film-applying mechanism 140 and the third film-applying mechanism 160. The feeding mechanism 130 includes a feeding bracket 131, and a feeding roller 132, multiple guide rollers 133, a feeding drive 134, and a take-up roller 135 mounted on the feeding bracket 131. The feeding roller 132 carries the strip 300 with the protective film 200 applied to it. The take-up roller 135 is connected to one end of the strip 300. The multiple guide rollers 133 respectively abut against the side of the strip 300 facing away from the protective film 200. The feeding drive 134 is connected to the take-up roller 135 and drives the take-up roller 135 to rotate, so that the strip 300 is conveyed under the guidance of the multiple guide rollers 133. For example, the feeding drive 134 can be a motor.

[0056] In this embodiment, one end of the feeding bracket 131 is adjacent to the turntable 110 so that the first film-applying mechanism 140 can pick up the protective film 200 from the material belt 300. The feeding drive 134 drives the take-up roller 135 to cause the material belt 300 to be conveyed intermittently. The interval between material belt 300 transmissions is the same as the interval between two times the first film-applying mechanism 140 picks up the protective film 200.

[0057] The working process of the above-mentioned feeding mechanism 130 is roughly as follows: The material belt 300 with protective film 200 is assembled to the take-up roller 135 and the feeding roller 132. Then, the feeding drive 134 drives the take-up roller 135 to carry the material belt 300 under the guidance of multiple guide rollers 133. When the protective film 200 on the material belt 300 near the turntable 110 moves to the preset position, the feeding drive 134 stops driving the take-up roller 135. After the first film-applying mechanism 140 picks up the protective film 200 and removes it from the material belt 300, the feeding drive 134 continues to drive the take-up roller 135 to carry the material belt 300 under the guidance of multiple guide rollers 133. Repeating the above process can realize the transmission of the material belt 300, thereby realizing the continuous supply of protective film 200.

[0058] Therefore, the feeding mechanism 130 can continuously supply the protective film 200, which helps to improve the efficiency of film application. In addition, the feeding mechanism 130 adopts a circulating transmission method, with a simple overall structure and low manufacturing cost.

[0059] Please see Figure 2The first film application mechanism 140 includes a first transfer component 141, a first mounting base 142 disposed on one axial side of the turntable 110, and positioning members 143, two adsorption members 144, and two sets of first film application components 145 disposed on the side of the first mounting base 142 facing the turntable 110. The positioning member 143 is telescopically mounted on the first mounting base 142 along the axial direction of the turntable 110 and is used to press the protective film 200 against the top surface 20b of the workpiece 20. Two adsorption members 144 are symmetrically arranged on both sides of the positioning member 143 and are used to adsorb the two ends of the protective film 200. The first transfer assembly 141 is connected to the first mounting base 142 and is used to drive the first mounting base 142 closer to or away from the turntable 110. Two sets of first film-applying assemblies 145 are located between the two adsorption members 144 and are symmetrically arranged on both sides of the positioning member 143. They are used to roll and press the protective film 200 along the direction from the top surface 20b to the side surface 20c while the positioning member 143 presses the protective film 200 against the top surface 20b of the workpiece 20, so that the protective film 200 is attached to the two side surfaces 20c of the workpiece 20.

[0060] Please see Figure 2 and Figure 3 The positioning element 143 includes a movable body 1431, a positioning body 1432, and an elastic body 1433. The movable body 1431 includes a movable rod 1431a and a stop portion 1431b. The movable rod 1431a is movably inserted through the first mounting base 142 along the axial direction of the turntable 110. The stop portion 1431b is connected to the end of the movable rod 1431a away from the turntable 110 and is located on the side of the first mounting base 142 opposite to the turntable 110, and is used to abut against the first mounting base 142. The positioning body 1432 is connected to one end of the movable rod 1431a near the turntable 110. The side of the positioning body 1432 facing away from the movable rod 1431a has a positioning surface 1432a adapted to the top surface 20b. The positioning surface 1432a is used to press the protective film 200 against the top surface 20b of the workpiece 20. The elastic body 1433 is sleeved on the movable rod 1431a, and both ends of the elastic body 1433 abut against the positioning body 1432 and the first mounting base 142, respectively. For example, the elastic body 1433 can be a spring, and the movable rod 1431a and the stop portion 1431b are integrally formed.

[0061] Driven by the first transfer assembly 141, the first mounting base 142 first moves the positioning member 143 downward a certain distance, so that the positioning surface 1432a of the positioning body 1432 presses the protective film 200 against the top surface 20b. At this time, the top surface 20b exerts an upward force on the positioning surface 1432a. Then, as the first mounting base 142 continues to move downward under the drive of the first transfer assembly 141, the positioning surface 1432a, under the force of the top surface 20b, drives the positioning body 1432 to compress the elastic body 1433, thereby causing the movable body 1431 to move upward relative to the first mounting base 142. During this process, the two sets of first film-applying assemblies 145 roll and press the protective film 200 along the direction from the top surface 20b to the side surface 20c, so that the protective film 200 is attached to the two side surfaces 20c of the workpiece 20. After the protective film 200 is attached to the two sides 20c, the first mounting base 142, driven by the first transfer component 141, first moves the positioning member 143 upward a certain distance, causing the positioning surface 1432a of the positioning body 1432 to detach from the protective film 200. Then, the first mounting base 142 continues to move upward under the drive of the first transfer component 141. During this process, the elastic force of the elastic body 1433 is released, which elastically pushes the positioning body 1432 downward to reset.

[0062] The aforementioned positioning element 143, through the elastic body 1433, can move up and down and reset relative to the first mounting base 142. It has a simple structure and low manufacturing cost.

[0063] Please see Figure 3 and Figure 4 Each first film-applying assembly 145 includes a rotating member 1451, a roller 1452, and a pulling drive member 1453. The rotating member 1451 is rotatably connected to the first mounting base 142. The roller 1452 is rotatably connected to one end of the rotating member 1451 and is disposed between the positioning member 143 and the suction member 144 for rolling and pressing against the protective film 200. The pulling drive member 1453 is disposed on the first mounting base 142 and connected to the end of the rotating member 1451 away from the roller 1452. The pulling drive member 1453 is used to drive the rotating member 1451 to move the roller 1452 closer to the positioning member 143 when the positioning member 143 presses against the protective film 200 and the first mounting base 142 moves toward the turntable 110, so that the roller 1452 rolls and presses against the protective film 200. For example, the pulling drive member 1453 can be a cylinder.

[0064] In this embodiment, the pulling drive 1453 can be linked with the positioning member 143 via a sensor (not shown). Specifically, after the positioning surface 1432a presses against the protective film 200 onto the top surface 20b, the pulling drive 1453 drives the rotating member 1451 to move closer to the positioning member 143 as the first mounting base 142 continues to descend, so that the two rollers 1452 roll and press against the protective film 200 onto the two sides 20c. Alternatively, as the positioning surface 1432a disengages from the protective film 200 and the first mounting base 142 rises, the pulling drive 1453 drives the rotating member 1451 away from the positioning member 143 to achieve the reset of the positioning member 143. Exemplarily, the sensor can be a position sensor, a contact sensor, a pressure sensor, etc.

[0065] It should be noted that the distance by which the pulling drive 1453 drives the rotating part 1451 to approach the positioning part 143 is equal to the distance between the top surface 20b and the roller 1452 after the positioning surface 1432a presses against the protective film 200 to the top surface 20b. The movement trajectory of the roller 1452 during the descent of the first mounting seat 142 is the same as the trajectory from the top surface 20b to the side surface 20c of the workpiece 20.

[0066] Please see Figure 2 The first transfer assembly 141 includes a first film-applying bracket 1411, a lifting drive 1412, and a horizontal drive 1413. The first film-applying bracket 1411 is disposed adjacent to the turntable 110. The lifting drive 1412 is connected to a first mounting base 142 and is used to drive the first mounting base 142 closer to or further away from the turntable 110. The horizontal drive 1413 is disposed on the first film-applying bracket 1411 and connected to the lifting drive 1412, and is used to drive the lifting drive 1412 to move horizontally. For example, both the lifting drive 1412 and the horizontal drive 1413 can be linear cylinders.

[0067] Therefore, by driving the first mounting base 142 to move in the vertical and horizontal directions through the lifting drive component 1412 and the horizontal drive component 1413, the adsorption component 144 picks up the protective film 200 on the material belt 300 and moves the protective film 200 above the workpiece 20. The structure is simple and the manufacturing cost is low.

[0068] Please see Figure 2 and Figure 5The second film-applying mechanism 150 is used to roll and press the protective film 200 from one side 20c to the other side 20c, so that the protective film 200 is attached to the two end faces 20d of the workpiece 20. The second film-applying mechanism 150 includes a second film-applying bracket 151, a second transfer assembly 152, and two sets of second film-applying assemblies 153. The second film-applying bracket 151 is adjacent to the turntable 110, and the two sets of second film-applying assemblies 153 are located on one side of the axial direction of the turntable 110. The second transfer assembly 152 is located on the second film-applying bracket 151 and connects the two sets of second film-applying assemblies 153, and is used to drive the two sets of second film-applying assemblies 153 to rotate from one side 20c to the other side 20c, so that the two sets of second film-applying assemblies 153 roll and press the protective film 200.

[0069] Please see Figure 5 Each second film application assembly 153 includes a second mounting base 1531 and a roller 1532 connected to the second mounting base 1531 on the side facing the turntable 110. The second transfer assembly 152 includes two transfer units 152a. Each transfer unit 152a includes a linkage 1521, a rotating wheel 1522, a transmission belt 1523, and a rotary drive 1524. The linkage 1521 passes through the second film-applying bracket 151 along the axial direction of the turntable 110 and is rotatably connected to the second film-applying bracket 151. One end of the linkage 1521 is connected to the second mounting base 1531, and the other end of the linkage 1521 is connected to the rotating wheel 1522. The transmission belt 1523 meshes with the rotating wheel 1522. The rotary drive 1524 is disposed on the second film-applying bracket 151 and meshes with the transmission belt 1523. It is used to drive the transmission belt 1523 to drive the rotating wheel 1522 to rotate, so that the linkage 1521 drives the corresponding second mounting base 1531 to rotate from one side 20c to the other side 20c, thereby causing the roller 1532 to roll and press against the protective film 200. For example, the rotary drive 1524 can be a rotary cylinder.

[0070] It should be noted that the two rollers 1532 are arranged radially apart along the turntable 110 in their natural state, so that the workpiece 20 located on the turntable 110 moves between the two rollers 1532.

[0071] Please see Figure 2 and Figure 6In this application, the connection point of the top surface 20b, the side surface 20c, and the end surface 20d is defined as the workpiece fillet 20e. The third film-applying mechanism 160 is used to roll and press the protective film 200 along the direction from the top surface 20b to the two end surfaces 20d, so that the protective film 200 is attached to the two workpiece fillets 20e. The third film-applying mechanism 160 includes a third film-applying bracket 161, a pressing drive 162, a third mounting base 163, and two sets of third film-applying assemblies 164. The third film-applying bracket 161 is adjacent to the turntable 110, and the third mounting base 163 is located on one side of the axial direction of the turntable 110. Two sets of third film-applying assemblies 164 are rotatably connected to the third mounting base 163 respectively. The pressing drive 162 is located on the third film-applying bracket 161 and connected to the third mounting base 163, and is used to drive the third mounting base 163 to approach the turntable 110 so that the two sets of third film-applying assemblies 164 roll and press against the protective film 200 in the direction from the top surface 20b to the two end surfaces 20d respectively.

[0072] Please see Figure 6 Each third film-applying assembly 164 includes a connector 1641, a pressure roller 1642, and a pressure-driving component 1643. The connector 1641 is rotatably connected to the third mounting base 163. The pressure roller 1642 is connected to one end of the connector 1641 and is used to roll and press against the protective film 200. The pressure-driving component 1643 is rotatably connected to both the third mounting base 163 and the connector 1641, and is used to apply pressure to the connector 1641 from the third mounting base 163 to the pressure roller 1642. For example, the pressure-driving component 1643 can be a cylinder.

[0073] The working process of the third film-applying mechanism 160 is roughly as follows: The holding drive 162 first drives the third mounting base 163 to move downward a certain distance, so that the two pressure rollers 1642 press against the protective film 200 to the top surface 20b. At this time, the workpiece 20 applies an upward reaction force to the two pressure rollers 1642 through the protective film 200. Then, the holding drive 162 continues to drive the third mounting base 163 to move downward. Under the reaction force of the workpiece 20, the two pressure rollers 1642 drive the two connecting pieces 1641 to rotate relative to the third mounting base 163, thereby causing the two pressure rollers 1642 to roll from the top surface 20b to the two end faces 20d to press against the protective film 200. During this process, in order to prevent the two pressure rollers 1642 from detaching from the protective film 200 during the downward movement, the pressing drive 1643 applies pressure to the connecting pieces 1641 from the third mounting base 163 to the pressure rollers 1642.

[0074] Please see Figure 6The third mounting base 163 also has two limiting grooves 163a. ​​Each third film application assembly 164 also includes a limiting member 1644. One end of the limiting member 1644 is connected to the connector 1641, and the other end of the limiting member 1644 is movably received in the limiting groove 163a to limit the rotation range of the connector 1641 relative to the third mounting base 163.

[0075] Therefore, the rotation range of the connector 1641 relative to the third mounting base 163 can be limited by the two limiting grooves 163a, which is beneficial to improving the rolling accuracy of the two pressure rollers 1642 on the protective film 200.

[0076] Please see Figure 7 This application also provides a film application method using the film application device 100 of the above embodiments, for applying a protective film 200 to the surface 20a of the workpiece 20. The film application method includes:

[0077] S110, place the workpiece 20 onto the turntable 110 of the film application device 100. In this embodiment, while performing S110, a material strip with a protective film 200 can also be assembled onto the feeding mechanism 130 of the film application device 100. The feeding drive 134 drives the receiving roller 135 to intermittently transmit the material strip 300 under the guidance of multiple guide rollers 133, so that the protective film 200 on the material strip 300 intermittently stays on the side of the feeding bracket 131 adjacent to the turntable 110.

[0078] S120, the first transfer component 141 of the film application device 100 drives the two adsorption members 144 to adsorb the protective film 200, and drives the protective film 200 to move above the workpiece 20.

[0079] Specifically, the lifting drive 1412 and the horizontal drive 1413 drive the first mounting base 142 to move in the vertical and horizontal directions, so that the adsorption member 144 sequentially picks up the protective film 200 on the material belt 300 and moves the protective film 200 above the workpiece 20.

[0080] S130, the positioning member 143 of the film application device 100 is driven by the first transfer component 141 to hold the protective film 200 against the top surface 20b of the workpiece 20.

[0081] Specifically, the lifting drive 1412 drives the first mounting base 142 to move downward a certain distance, so that the positioning surface 1432a of the positioning body 1432 presses against the protective film 200 to the top surface 20b.

[0082] S140, the two first film-applying components 145 of the film-applying device 100 are driven by the first transfer component 141 to roll and press the protective film 200 along the direction from the top surface 20b of the workpiece 20 to the two sides 20c, so that the protective film 200 is attached to the two sides 20c of the workpiece 20.

[0083] Specifically, the lifting drive 1412 continues to drive the first mounting base 142 to move downward, pulling the drive 1453 to drive the rotating component 1451 to move the rollers 1452 closer to the positioning body 1432. During the descent of the first mounting base 142, the two rollers 1452 roll from the top surface 20b to the side surface 20c and press against the protective film 200 onto the two side surfaces 20c.

[0084] S150, the turntable 110 is driven by the turntable drive 120 of the film application device 100 to rotate the workpiece with protective film 200 from the first film application mechanism 140 to the second film application mechanism 150.

[0085] S160, the second film-applying mechanism 150 rolls and presses the protective film 200 from one side 20c of the workpiece 20 to the other side 20c, so that the protective film 200 is attached to the two end faces 20d of the workpiece 20.

[0086] Specifically, the rotary drive 1524 drives the transmission belt 1523 to rotate the wheel 1522, which causes the linkage 1521 to drive the corresponding second mounting base 1531 to rotate from one side 20c to the other side 20c, thereby causing the roller 1532 to roll and press the protective film 200 against the two end faces 20d.

[0087] S170, the turntable 110 is driven by the turntable drive 120 to rotate the workpiece with protective film 200 from the second film application mechanism 150 to the third film application mechanism 160.

[0088] S180, the third film-applying mechanism 160 rolls and presses the protective film 200 along the direction from the top surface 20b of the workpiece 20 to the two end surfaces 20d of the workpiece 20, so that the protective film 200 is attached to the two workpiece rounded corners 20e of the workpiece 20.

[0089] Specifically, the pressing drive 162 drives the third mounting base 163 to move close to the turntable 110, so that the two sets of third film-applying assemblies 164 roll and press against the protective film 200 in the direction from the top surface 20b to the two end surfaces 20d, so as to attach the protective film 200 at the connection between the top surface 20b and the end surfaces 20d.

[0090] In the aforementioned film-applying device 100 and film-applying method, during the process of applying the protective film 200 to the top surface 20b and side surface 20c of the workpiece 20, the positioning member 143 is always in a state of pressing the protective film 200 against the top surface 20b, which can prevent the protective film 200 from moving relative to the workpiece 20 before being applied, thereby improving the accuracy of film application. In addition, the first film-applying mechanism 140, the second film-applying mechanism 150 and the third film-applying mechanism 160 can work in conjunction with the turntable 110 to sequentially apply the protective film 200 to the top surface 20b, the two side surfaces 20c and the two end surfaces 20d, resulting in continuous operation, low labor intensity and improved film application efficiency.

[0091] It will be apparent to those skilled in the art that this application is not limited to the details of the exemplary embodiments described above, and that this application can be implemented in other specific forms without departing from the spirit or essential characteristics of this application. Therefore, the embodiments should be regarded as exemplary and non-limiting in all respects, and the scope of this application is defined by the appended claims rather than the foregoing description. Thus, all variations falling within the meaning and scope of equivalents of the claims are intended to be embraced within this application.

[0092] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of this application and are not intended to limit it. Although this application has been described in detail with reference to preferred embodiments, those skilled in the art should understand that modifications or equivalent substitutions can be made to the technical solutions of this application without departing from the spirit and scope of the technical solutions of this application.

Claims

1. A film-applying device for applying a protective film to the surface of a workpiece, the surface of the workpiece comprising a top surface and two side surfaces and two end surfaces alternately arranged circumferentially along the top surface and connected to the top surface, characterized in that, The film application device includes: A turntable for carrying the workpiece and a turntable drive unit connected to the turntable, the turntable drive unit being used to drive the turntable to rotate; A first film-applying mechanism, a second film-applying mechanism, and a third film-applying mechanism are arranged sequentially at intervals along the circumference of the turntable; wherein, The first film-applying mechanism includes a first transfer component, a first mounting base, and positioning members, two suction members, and two sets of first film-applying components respectively disposed on the side of the first mounting base facing the turntable. The positioning member is telescopically disposed on the first mounting base and is used to hold the protective film against the top surface of the workpiece. The two suction members are symmetrically disposed on both sides of the positioning member and are used to suction the two ends of the protective film. The first transfer component is connected to the first mounting base and is used to drive the first mounting base to move. The two sets of first film-applying components are located between the two suction members and are symmetrically disposed on both sides of the positioning member. They are used to roll and press the protective film against the top surface of the workpiece while the positioning member presses the protective film against the top surface of the workpiece, so that the protective film is attached to the two sides of the workpiece. Each first film-applying assembly includes a rotating component, a roller, and a pulling drive component. The rotating component is rotatably connected to the first mounting base, and the roller is rotatably connected to one end of the rotating component. The roller is disposed between the positioning component and the suction component and is used to roll and press against the protective film. The pulling drive component is disposed on the first mounting base and connected to the end of the rotating component away from the roller. The pulling drive component is used to drive the rotating component to move the roller closer to the positioning component when the positioning component presses against the protective film and the first mounting base moves toward the turntable, so that the roller rolls and presses against the protective film. The second film-applying mechanism is used to roll and press the protective film from one of the sides to the other side so that the protective film is attached to the two end faces of the workpiece; the third film-applying mechanism is used to roll and press the protective film along the direction from the top surface of the workpiece to the two end faces of the workpiece. The third film-applying mechanism includes a third mounting base and two sets of third film-applying assemblies. The third mounting base has two limiting grooves. Each set of third film-applying assemblies includes a connector, a pressure roller, a pressure driving component, and a limiting component. The connector is rotatably connected to the third mounting base. The pressure roller is connected to one end of the connector and is used to roll and press against the protective film. The pressure driving component is rotatably connected to the third mounting base and the connector, respectively. The pressure driving component is used to apply pressure to the connector from the third mounting base to the pressure roller. One end of the limiting component is connected to the connector, and the other end of the limiting component is movably received in the limiting groove to limit the rotation range of the connector relative to the third mounting base.

2. The film-applying device as described in claim 1, characterized in that, The positioning element includes: The movable body includes a movable rod and a stop. The movable rod is movably inserted through the first mounting seat along the axial direction of the turntable. The stop is connected to the end of the movable rod away from the turntable and is located on the side of the first mounting seat opposite to the turntable, for supporting the first mounting seat. A positioning body is connected to one end of the movable rod near the turntable. The side of the positioning body opposite to the movable rod is provided with a positioning surface that is adapted to the top surface. The positioning surface is used to press the protective film against the top surface of the workpiece. An elastic body is sleeved on the movable rod, and both ends of the elastic body abut against the positioning body and the first mounting base, respectively.

3. The film-applying device as described in claim 1, characterized in that, The first transfer component includes: The first film-applying bracket is disposed adjacent to the turntable; A lifting drive unit, connected to the first mounting base, is used to drive the first mounting base closer to or further away from the turntable; A horizontal drive component is disposed on the first film-applying bracket and connected to the lifting drive component, and is used to drive the lifting drive component to move horizontally.

4. The film-applying device as described in claim 1, characterized in that, The second film-applying mechanism includes a second film-applying bracket, a second transfer assembly, and two sets of second film-applying assemblies. The second film-applying bracket is adjacent to the turntable, and the two sets of second film-applying assemblies are located on one side of the axial direction of the turntable. The second transfer assembly is located on the second film-applying bracket and connects the two sets of second film-applying assemblies, and is used to drive the two sets of second film-applying assemblies to rotate from one side to the other side, so that the two sets of second film-applying assemblies roll and press against the protective film.

5. The film-applying device as described in claim 4, characterized in that, Each set of the second film application assembly includes a second mounting base and a roller connected to the side of the second mounting base facing the turntable; The second transfer assembly includes two transfer units. Each transfer unit includes a linkage, a roller, a transmission belt, and a rotary drive. The linkage passes through the second film-applying bracket along the axial direction of the turntable and is rotatably connected to the second film-applying bracket. One end of the linkage is connected to the second mounting base, and the other end of the linkage is connected to the roller. The transmission belt meshes with the roller. The rotary drive is located on the second film-applying bracket and meshes with the transmission belt. It is used to drive the transmission belt to rotate the roller, so that the linkage drives the corresponding second mounting base to rotate from one side to the other side, thereby causing the roller to roll and press against the protective film.

6. The film-applying device as described in claim 1, characterized in that, The connection between the top surface, side surface and end surface of the workpiece forms a workpiece fillet; The third film-applying mechanism includes a third film-applying bracket and a pressing drive. The third film-applying bracket is adjacent to the turntable, and the third mounting base is located on one side of the axial direction of the turntable. The pressing drive is located on the third film-applying bracket and connected to the third mounting base, and is used to drive the third mounting base closer to the turntable so that the two sets of third film-applying components roll and press the protective film against the two rounded corners of the workpiece.

7. The film-applying device as described in claim 1, characterized in that, Also includes: A feeding mechanism is disposed between the first film-applying mechanism and the third film-applying mechanism. The feeding mechanism includes a feeding bracket, a feeding roller, a plurality of guide rollers, a feeding drive, and a take-up roller disposed on the feeding bracket. The feeding roller is used to carry the material strip with the protective film attached. The take-up roller is connected to one end of the material strip. The plurality of guide rollers are respectively used to abut the side of the material strip away from the protective film. The feeding drive is connected to the take-up roller and is used to drive the take-up roller to rotate so that the material strip is conveyed under the guidance of the plurality of guide rollers.

8. A film-applying method using the film-applying apparatus as described in any one of claims 1 to 7, for applying a protective film to the surface of a workpiece, the surface of the workpiece comprising a top surface and two side surfaces and two end surfaces connected to the top surface and alternately arranged circumferentially along the top surface, characterized in that, The film application method includes: Place the workpiece onto the turntable of the film-applying device; The first transfer component of the film-applying device drives two adsorption elements to adsorb the protective film, and moves the protective film to above the workpiece. The first transfer component drives the positioning element of the film application device to hold the protective film against the top surface of the workpiece; The first transfer component drives the two first film-applying components of the film-applying device to roll and press against the protective film along the direction from the top surface of the workpiece to the two sides, so that the protective film is attached to the two sides of the workpiece; The turntable of the film-applying device is driven by the turntable drive component to rotate the workpiece with the protective film applied from the first film-applying mechanism of the film-applying device to the second film-applying mechanism of the film-applying device. The second film-applying mechanism rolls and presses against the protective film from one side of the workpiece to the other side, so that the protective film is attached to the two end faces of the workpiece. The turntable is driven by the turntable drive to rotate the workpiece with the protective film attached from the second film application mechanism to the third film application mechanism of the film application device. The third film-applying mechanism rolls and presses against the protective film along the direction from the top surface of the workpiece to the two end faces of the workpiece.

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