Automatic protective film feeding device

Abstract

The invention relates to the technical field of film pasting, and particularly discloses an automatic protective film feeding device which comprises a base, a protective film feeding module and an SUS plate bearing module, the protective film feeding module and the SUS plate bearing module are arranged on the base, a conveying module used for conveying a protective film and placing the protective film on an SUS plate is further arranged on the base, and the conveying module comprises a suction unit, a driving unit and a smoothing unit; the suction unit comprises a conveying base and two suction cups arranged at the bottom of the conveying base, and the two suction cups are used for sucking the edges of the two opposite sides of the protective film. The device has the beneficial effects that the two smoothing pieces move towards the two sides correspondingly, the protective film is attached to the SUS plate from the center position to the two sides, the second suction cups on the two sides keep suction force on the two sides of the protective film, that is, the protective film is in the stretched state all the time till the protective film is separated from the second suction cups to be completely attached to the SUS plate finally, and therefore the protective film is completely attached to the SUS plate. And the flatness of the protective film is ensured in the attaching process, so that the condition that the protective film is wrinkled is effectively avoided.

Description

Technical Field

[0001] The invention relates to the technical field of film pasting, and in particular to an automatic feeding device for a protective film. Background Art

[0002] In many industries such as electronics, home appliances, and construction, SUS plates (stainless steel plates) are used due to their excellent corrosion resistance, mechanical strength, and beautiful appearance. However, during processing, transportation, storage, and use, the surface of SUS plates is easily damaged by scratches, fingerprint contamination, chemical corrosion, etc. These damages not only affect the appearance quality of the product, but may also reduce its performance and life. In order to protect the surface of SUS plates, it has become a common practice to apply protective films. The protective film can effectively isolate the SUS plate from the external environment and prevent it from physical and chemical damage.

[0003] The protective film is generally a PE protective film, because the polyethylene material itself has a certain degree of flexibility and elasticity, and can adapt to the surface shape and size changes of the SUS plate to a certain extent. For example, when the SUS plate is slightly bent or stretched, the PE protective film can stretch or shrink accordingly with the deformation of the plate, and is not easy to break or fall off, thereby continuing to maintain the protective effect on the surface of the plate.

[0004] In the prior art, the usual method of applying the protective film is to move the protective film to the top of the SUS plate and quickly lower the protective film so as to attach the protective film to the SUS plate. The working principle is shown in the Chinese patent with the authorization announcement number CN216638393U, which specifically discloses a porous plate film-applying device, which includes a film-applying strip, a traction part and a pressing part. The traction part includes an active roller and a driven roller. The film-applying strip is provided with a plurality of rectangular dividing lines, which are arranged in sequence along the axial direction of the film-applying strip. The film-applying strip is located within the rectangular dividing lines. Part is a mucosal layer, the size of the mucosal layer is the same as that of the porous plate, the lower surface of each mucosal layer and the upper surface of one of the isolation film layers are in contact with each other; one end of the film strip is wound around the driven roller, and the other end of the film strip is wound around the active roller; the frame is arranged between the active roller and the driven roller, the supporting plate is fixedly connected to the frame, the upper surface of the supporting plate is provided with a groove, the pressure plate is slidably connected to the frame, the pressure plate is located above the supporting plate, the film strip passes through the space between the pressure plate and the supporting plate, and each cutting knife corresponds to one of the side edges of the porous plate.

[0005] During the process of moving and laminating the protective film, the surface of the protective film may be deformed, and wrinkles or bubbles may be generated during lamination. If the film is already tightly attached to the plate in some areas, the bubbles near these areas will be trapped. Even if the scraper is used to push, it is difficult to expel the bubbles because the scraper cannot separate the already attached film again to allow the bubbles to escape, thereby increasing the unqualified rate of the product. Summary of the invention

[0006] The present invention provides an automatic feeding device for protective film, aiming to solve the technical problem in the related art that during the process of moving and laminating the protective film, the surface of the protective film may be deformed, wrinkles or bubbles may be generated during laminating, and if the film is tightly laminated to the plate in certain areas, then the bubbles near these areas will be trapped, and it is difficult to expel the bubbles even by pushing with a scraper, because the scraper cannot separate the already laminated film again to allow the bubbles to escape, thereby increasing the technical problem of increasing the unqualified rate of the product.

[0007] The present invention discloses an automatic feeding device for protective film, comprising: a base, a protective film feeding module and a SUS board bearing module arranged on the base; the base is also provided with a conveying module for conveying the protective film and placing the protective film on the SUS board; the conveying module comprises a suction unit, a driving unit and a smoothing unit; the suction unit comprises a conveying seat and two groups of suction cups arranged at the bottom of the conveying seat, the two groups of suction cups are used to absorb the edges of the opposite sides of the protective film; the driving unit is connected to the conveying seat and drives the conveying seat to rise and fall and translate; the smoothing unit comprises a shell fixedly arranged on the top of the conveying seat, a lifting frame vertically movable on the shell and a horizontal sliding frame A smoothing component is movably assembled on the lifting frame, and the sliding direction of the smoothing component is the spacing arrangement direction of the two groups of suction cups. The smoothing component includes a connecting frame arranged on the lifting frame and penetrating the conveying seat up and down, and a smoothing piece arranged at the bottom of the connecting frame; the moving stroke of the two smoothing pieces has an intermediate position close to each other, and the bottom of the conveying seat has an accommodating cavity for accommodating the two smoothing pieces in the intermediate position. The lifting frame is used to drive the two smoothing pieces in the intermediate position to move downward and press the protective film onto the SUS plate, and the moving stroke of the two smoothing pieces includes a smoothing stroke of moving from the intermediate position to both sides respectively and attaching the protective film to the SUS plate.

[0008] Beneficial effect: The air cylinder drives the lifting frame to descend, and the air collecting box and the smoothing piece descend at the same time, and the smoothing piece descends and leaves the accommodating chamber. When the smoothing piece descends and leaves the accommodating chamber, it pushes down the center of the protective film, and the second suction cups on both sides still maintain suction on the protective film, so the two sides of the protective film are still tightly attached to the bottom of the conveying seat. The center of the protective film will first contact the SUS plate, and there is a gap between the protective film and the SUS plate on both sides of the smoothing piece. The air holes on both sides respectively exhaust air from the gap between the SUS plate and the protective film, so that a negative pressure environment is formed between the protective films on both sides and the SUS plate. Then the two smoothing parts move to both sides respectively, and gradually attach the protective film to the SUS board from the center position to both sides. Since there is a negative pressure environment between the protective films on both sides and the SUS board, the protective film can be better attached to the SUS board, and no bubbles will be generated between the protective film and the SUS board. In addition, while the two smoothing parts push the protective film to both sides respectively, the second suction cups on both sides maintain suction on the protective film. That is, the protective film always maintains tension and is in a stretched state until it is attached to the SUS board, which effectively avoids wrinkles on the protective film and ensures the quality of the product.

[0009] The lifting frame is also provided with a negative pressure unit, which includes two air collecting boxes fixed to the lifting frame and arranged on both sides of the smoothing member. The conveying seat is provided with an avoidance through-hole for the air collecting boxes to pass through. The air collecting box is connected to a suction member, and air holes are provided on opposite surfaces of the air collecting boxes.

[0010] The effect is that the center of the protective film will contact the SUS board first, and there is a gap between the protective film and the SUS board on both sides of the smoothing part. The air holes on both sides respectively exhaust air from the gap between the SUS board and the protective film, so that a negative pressure environment is formed between the protective films on both sides and the SUS board. In this way, the protective film can be better attached to the SUS board, and there will be no bubbles between the attached protective film and the SUS board, which can effectively improve the quality of the product.

[0011] Preferably, the protective film loading module includes a bracket fixedly mounted on the base, a flip plate is rotatably mounted on the inner side of the bracket, the flip plate rotates along an axis extending in the front-rear direction, a first suction cup is arranged on the upper surface of the flip plate, an L-shaped positioning plate is vertically elastically slidably mounted on the flip plate, two limit blocks are also horizontally slidably mounted on the flip plate, a driving structure for driving the limit blocks to move is installed at the bottom of the flip plate, and the two limit blocks slide toward the two surfaces of the positioning plate respectively to position the protective film.

[0012] The effect is that the protective film on the flip plate can be positioned to prevent the protective film from being offset during the flipping process, thereby affecting product quality.

[0013] Preferably, the driving structure includes a fixed seat arranged at the bottom of the flip plate, and two air passages are arranged horizontally left and right and front and back in the fixed seat, and the two air passages are connected to each other. Sliding parts are installed in the two air passages in a horizontally sealed and sliding manner, and the sliding part is connected to the flip plate through a spring at one end away from the air passage. An air pump is connected to the air passage, and the limit blocks are vertically elastically slidably connected to the sliding parts.

[0014] The effect is that the two limit blocks can be driven to move at the same time, so as to push the protective film toward the positioning plate, thereby completing the positioning of the protective film.

[0015] Preferably, the SUS board bearing module comprises a bearing platform mounted on the base in a front-rear horizontal sliding manner, and a fixing frame is mounted on the bearing platform in a vertical elastic sliding manner, and the fixing frame is a U-shaped structure.

[0016] Preferably, the driving assembly includes a first lead screw horizontally rotatably mounted on a lifting frame, a sliding rod is fixedly mounted on the lifting frame, the first lead screw is parallel to the axis of the sliding rod, two connecting frames are screwed on the first lead screw, both of which are slidably matched with the sliding rod, the connecting frame is a U-shaped structure, and the smoothing piece is fixedly mounted on the bottom of the connecting frame.

[0017] Preferably, the cross-section of the smoothing member is a semicircular structure.

[0018] The effect is that the protective film can be better attached to the SUS plate when the smoothing member moves to both sides.

[0019] Preferably, the driving unit comprises a mounting frame fixedly mounted on the base, a first slider is horizontally slidably mounted on the mounting frame, a second slider is vertically slidably mounted on the first slider, and the conveying seat is fixedly mounted on the second slider.

[0020] The effect is that the conveying base can be driven to move, thereby conveying the protective film to the SUS plate.

[0021] Preferably, a cylinder is fixedly mounted on the conveying seat, and the lifting frame is fixedly mounted on the telescopic part of the cylinder.

[0022] Preferably, the suction member is an air pump fixedly mounted on the lifting frame.

[0023] By adopting the above technical solution, the beneficial effects of the present invention are as follows: The cylinder drives the lifting frame to descend, and the air collecting box and the smoothing piece descend at the same time, and the smoothing piece descends and leaves the accommodating chamber. When the smoothing piece descends and leaves the accommodating chamber, it will push down the center position of the protective film, and the second suction cups on both sides still maintain suction on the protective film, so the two sides of the protective film are still tightly attached to the bottom of the conveying seat, and then the two smoothing pieces move to both sides respectively, and the protective film is gradually attached to the SUS board from the center position to both sides. In the process of the two smoothing pieces pushing the protective film to both sides respectively, the second suction cups on both sides keep suction on the protective film, and the protective film is always in a stretched state until the protective film is finally separated from the second suction cup and completely attached to the SUS board. The flatness of the protective film is guaranteed during the attachment process, so the wrinkles of the protective film are effectively avoided, thereby ensuring the quality of the product.

[0024] The center of the protective film will first contact the SUS board. There are gaps between the protective films and the SUS boards on both sides of the smoothing piece. The air holes on both sides respectively exhaust air from the gaps between the SUS boards and the protective film, so that a negative pressure environment is formed between the protective films on both sides and the SUS boards. This can make the protective film better adhere to the SUS board, and there will be no bubbles between the attached protective film and the SUS board, which can effectively improve the quality of the product.

[0025] When the flip plate flips the protective film from the bottom to the top, the first suction cup temporarily releases the adsorption of the protective film, and then the air pump connected to the second air pipe starts to work. When the air pump inhales air, the air pressure in the airway decreases, the sliding piece slides along the airway, the second spring is stretched, and the sliding piece in the left and right direction moves to the left, pushing the protective film to the left side onto the positioning plate, and the sliding piece in the front and back direction moves to the front side, and at the same time pushes the protective film to the front side onto the positioning plate. The protective film is positioned by the cooperation of the two sliding pieces and the positioning plate to avoid the protective film from being offset. BRIEF DESCRIPTION OF THE DRAWINGS

[0026] Figure 1 It is a schematic diagram of the overall structure of the present invention.

[0027] Figure 2 It is an internal schematic diagram of the present invention.

[0028] Figure 3 It is a structural schematic diagram of the base of the present invention.

[0029] Figure 4 It is a top view of the flip plate of the present invention.

[0030] Figure 5 It is a structural schematic diagram of the fixing seat of the present invention.

[0031] Figure 6 It is a left side view of the flip plate of the present invention.

[0032] Figure 7 For the present invention Figure 6 Cross-sectional view at AA in the middle.

[0033] Figure 8 It is a left side view of the conveying seat of the present invention.

[0034] Fig. 9 For the present invention Figure 8 Cross-sectional view at the middle BB.

[0035] Fig.10 It is an exploded schematic diagram of the lifting frame and the conveying base of the present invention.

[0036] Fig.11 It is a top view of the conveying seat of the present invention.

[0037] Fig.12 It is a left view of the carrying platform of the present invention.

[0038] Fig.13 For the present invention Fig.12 Cross-sectional view at CC.

[0039] Fig.14 It is a schematic structural diagram of the fixing frame of the present invention.

[0040] Fig.15 It is a schematic diagram of the state in which the conveying seat of the present invention moves to the carrying platform.

[0041] Reference numerals: 10. Base; 11. Protective shell; 12. Surface treatment module; 13. Photo module; 14. Discharging module; 20. Bracket; 21. Flip plate; 22. First suction cup; 23. First air pipe; 30. Positioning plate; 31. First spring; 32. Fixed seat; 33. Airway; 34. Sliding member; 35. Second spring; 36. Second air pipe; 37. Stop block; 40. Mounting frame; 41. First slider; 42 , second slider; 43, conveying seat; 44, second suction cup; 45, third air pipe; 50, shell; 51, cylinder; 52, lifting frame; 53, air collecting box; 54, air hole; 55, first through hole; 60, first screw; 61, sliding rod; 62, connecting frame; 63, smoothing piece; 64, second through hole; 65, accommodating chamber; 70, bearing platform; 71, second screw; 72, fixing frame; 73, third spring. DETAILED DESCRIPTION

[0042] Embodiments of the present invention are described in detail below, and examples of the embodiments are shown in the accompanying drawings. The embodiments described below with reference to the accompanying drawings are exemplary and intended to be used to explain the present invention, but should not be understood as limiting the present invention.

[0043] like Figures 1 to 15As shown, a specific embodiment of the automatic protective film feeding device of the present invention includes a base 10, a protective shell 11, a protective film feeding module, a conveying module, a surface treatment module 12, a camera module 13, a SUS board bearing module and a discharge module 14.

[0044] The protective film loading module is used to flip and load the protective film. The conveying module can absorb the protective film on the protective film loading module and then convey it to the SUS board, and then attach the protective film to the SUS board. The conveying module drives the protective film to pass through the surface treatment module 12 and the photographing module 13 in sequence during the movement. The surface treatment module 12 will perform surface treatment on the protective film to increase the adhesion of the protective film. The photographing module 13 will take a photo of the protective film. The SUS board carrying module is used to fix the SUS board. After the protective film is attached to the SUS board, the conveying module will send the attached SUS board to the discharging module 14, and the discharging module 14 will transport the SUS board with the coating to the next step for processing.

[0045] like Figure 1 As shown, the protective shell 11 is arranged above the base 10. In this embodiment, the protective shell 11 and the base 10 are both rectangular structures. The length direction of the protective shell 11 is defined as the left-right direction, and the width direction of the protective shell 11 is defined as the front-back direction. The material of the protective shell 11 is transparent glass, so that it is convenient for workers to observe the working conditions inside the device. An inspection window (not shown in the figure) is provided on the front side of the protective shell 11 to facilitate maintenance and repair of the internal components. Openings are provided on both the left and right sides of the protective shell 11 to facilitate feeding and discharging.

[0046] like Figure 3 , Figure 4 , Figure 5 and Figure 7 As shown, the protective film loading module includes an adsorption unit and a positioning unit; the adsorption unit includes a bracket 20, a flip plate 21, a first suction cup 22 and a first air pipe 23.

[0047] The bracket 20 is disposed on the upper surface of the base 10 near the left side. Two brackets 20 are disposed and have a U-shaped structure. The two brackets 20 are spaced apart from each other and are symmetrically disposed and fixed to the base 10 by bolts.

[0048] A flip plate 21 is rotatably mounted inside the bracket 20. The flip plate 21 rotates around an axis extending in the front-to-back direction. A first suction cup 22 is provided on the upper surface of the flip plate 21 near the left side. The adsorption surface of the first suction cup 22 is flush with the upper surface of the flip plate 21, so as to facilitate the adsorption of the protective film on the upper surface of the flip plate 21. In this embodiment, four first suction cups 22 are provided, and the four first suction cups 22 are distributed in a square shape. A first air pipe 23 is provided at the bottom of the flip plate 21. The first air pipe 23 is connected to the four first suction cups 22 at the same time, and an air pump is connected to the first air pipe 23. The air pump works to make the first air pipe 23 generate suction, so that the protective film is adsorbed on the flip plate 21.

[0049] The base 10 is also provided with a feeding mechanism (not shown in the figure) for conveying the protective film. The feeding mechanism is arranged below the flip plate 21. The left end of the feeding mechanism passes through the opening on the left side of the protective shell 11 and extends to the outside of the protective shell 11. The feeding mechanism is used to convey the protective film. The feeding mechanism conveys the protective film to the bottom of the flip plate 21, and then the flip plate 21 flips 180 degrees, so that the first suction cup 22 on the flip plate 21 rotates to the bottom. At the same time, the feeding mechanism has a lifting function to avoid the flipping of the flip plate 21. After the flip plate 21 flips 180 degrees, the feeding mechanism drives the protective film to rise, so that the protective film moves to the first suction cup 22, and then the feeding mechanism descends to avoid it. The flip plate 21 rotates 180 degrees again, driving the protective film to rotate to the top, so as to facilitate the conveying module to take the material.

[0050] It is particularly emphasized that, in the present embodiment, the SUS plate is mainly used for processing mobile phone accessories, and both the protective film and the SUS plate are rectangular structures.

[0051] Continue back Figure 4 , Figure 5 and Figure 7 As shown, the positioning unit includes a positioning plate 30 , a first spring 31 , a fixing seat 32 , an air passage 33 , a sliding member 34 , a second spring 35 , a second air pipe 36 and a limiting block 37 .

[0052] The positioning plate 30 is an L-shaped structure, and the positioning plate 30 is vertically slidably mounted on the flip plate 21 through the first spring 31, and the first suction cup 22 is located on the inner side of the positioning plate 30 (such as Figure 4 ), that is, one edge of the positioning plate 30 is located on the left side of the first suction cup 22, and the other edge of the positioning plate 30 is located on the front side of the first suction cup 22.

[0053] A fixing seat 32 is provided at the bottom of the flip plate 21. Two airways 33 arranged horizontally left and right and front and back are provided in the fixing seat 32. The two airways 33 are connected to each other. Sliders 34 are installed in the two airways 33 in a horizontal and sealed sliding manner, and one end of the slider 34 extends to the outside of the airway 33. That is, one of the sliders 34 slides horizontally in the left-right direction, and the other slider 34 slides horizontally in the front-back direction. And one end of the slider 34 located outside the airway 33 is connected to the flip plate 21 through a second spring 35. A second air pipe 36 is connected below the airway 33, and an air pump (not shown in the figure) is connected to the second air pipe 36. When the air pump inhales, the air pressure in the airway 33 decreases, which causes the slider 34 to slide along the airway 33. At this time, the second spring 35 will be stretched, that is, the slider 34 in the left-right direction moves to the left, and the slider 34 in the front-back direction moves to the front.

[0054] Each sliding member 34 is provided with a limit block 37 near the middle thereof through a spring for vertical sliding, and a clearance hole is provided at a position corresponding to the limit block 37 on the flip plate 21, through which the limit block 37 extends to the top of the flip plate 21. The two limit blocks 37 correspond to the two surfaces of the positioning plate 30, respectively. The first suction cups 22 are located inside the positioning plate 30 and the two limit blocks 37. The two sliding members 34 move simultaneously, and the protective film can be pushed to the inside of the positioning plate 30, thereby completing the positioning of the protective film.

[0055] When the flip plate 21 flips the protective film from the bottom to the top, the air pump on the first air pipe 23 stops working, so that the first suction cup 22 temporarily releases the adsorption of the protective film, and then the air pump connected to the second air pipe 36 starts working. When the air pump inhales, the air pressure in the airway 33 decreases, the sliding member 34 slides along the airway 33, the second spring 35 is stretched, the sliding member 34 in the left and right direction moves to the left, and pushes the protective film to the left side onto the positioning plate 30, and the sliding member 34 in the front and back direction moves to the front side, and at the same time pushes the protective film to the front side onto the positioning plate 30, and finally completes the positioning of the protective film. Since the protective film is easily offset during the transfer of the protective film by the flip plate 21, thereby affecting the quality of the product, after the protective film is positioned, the quality of the product can be effectively guaranteed. After completing the positioning of the protective film, the air pump on the first air pipe 23 works, so that the first suction cup 22 adsorbs the protective film again, and then the air pump connected to the second air pipe 36 stops working, so that the sliding member 34 is reset.

[0056] like Figure 3As shown, the surface treatment module 12 is fixedly mounted on the upper surface of the base 10, and the surface treatment module 12 is located on the right side of the protective film feeding module. In this embodiment, the surface treatment module 12 adopts plasma surface treatment technology, which can increase the adhesion of the protective film so that it can better adhere to the SUS board. Plasma surface treatment is a prior art, and its structure and principle are not described in detail.

[0057] The camera module 13 is fixedly mounted on the upper surface of the base 10, and the camera module 13 is located on the right side of the surface treatment module 12. The camera module 13 can take pictures of the protective film passing by.

[0058] like Figure 3 , Fig.13 as well as Fig.14 As shown, the SUS board bearing module includes a bearing platform 70 , a second lead screw 71 , a fixing frame 72 and a third spring 73 .

[0059] The carrying platform 70 is installed on the upper surface of the base 10 for horizontal sliding forward and backward movement, and the carrying platform 70 is located on the right side of the camera module 13. A second lead screw 71 is rotatably installed at the bottom of the base 10, and the axis of the second lead screw 71 is horizontally arranged along the front-to-back direction. The second lead screw 71 passes through the carrying platform 70 and is threadedly connected to the carrying platform 70. A motor for driving the second lead screw 71 to rotate is installed at one end of the second lead screw 71, so that the carrying platform 70 can be driven to slide forward and backward on the base 10 through the second lead screw 71.

[0060] The supporting platform 70 has a U-shaped groove, in which a U-shaped fixing frame 72 is slidably installed up and down. The fixing frame 72 has a bottom plate and two opposite side plates. A third spring 73 is provided at the bottom of the fixing frame 72 to help it reset. In the initial state, the fixing frame 72 is higher than the upper surface of the supporting platform 70, and the opening of the fixing frame 72 faces the rear side.

[0061] A SUS plate loading mechanism (not shown in the figure) is provided on the rear side of the base 10, and the carrying platform 70 continuously reciprocates back and forth. When it moves to the rear side, the SUS plate loading mechanism can transport the SUS plate onto the carrying platform 70, and can transport the SUS plate to the inner side of the two side plates of the fixed frame 72. The width of the inner side of the fixed frame 72 is just the width of the SUS plate, so that the fixed frame 72 can limit the SUS plate.

[0062] Continue back Figure 3 The discharging module 14 is installed on the base 10, and the discharging module 14 is located on the right side of the SUS board bearing module. The discharging module 14 is a conveyor belt structure, and the axis of the roller driving the conveyor belt is arranged horizontally in the front-to-back direction, and the right end of the conveyor belt passes through the right opening of the protective shell 11 and extends to the outside of the protective shell 11. The discharging module 14 can convey the SUS board with the protective film attached to the next process.

[0063] like Figure 3 , Fig. 9 , Fig.10 and Fig.11 As shown, the conveying module includes a driving unit, a suction unit, a negative pressure unit and a smoothing unit.

[0064] like Figure 3 As shown, the driving unit includes a mounting frame 40 , a first slider 41 and a second slider 42 .

[0065] The mounting frame 40 is fixedly mounted on the upper surface of the base 10, and a slideway horizontally arranged along the left-right direction is provided on the mounting frame 40. The first slider 41 is mounted on the slideway of the mounting frame 40 for horizontal sliding left-right, and a driving mechanism is installed on the first slider 41, so that the first slider 41 can slide back and forth horizontally left-right on the mounting frame 40.

[0066] The first slider 41 is provided with a vertically arranged slideway, on which the second slider 42 is slidably mounted, and the second slider 42 is vertically slidably mounted on the slideway on the first slider 41. The second slider 42 is also provided with a driving mechanism, so that the second slider 42 can vertically reciprocate on the first slider 41. The suction unit is provided on the second slider 42, so that the movement of the suction unit is realized by the left and right horizontal sliding of the first slider 41 and the vertical sliding of the second slider 42, and the suction unit can transport the protective film on the flip plate 21 to the SUS board bearing module.

[0067] It is particularly noted that the driving mechanisms on the first slider 41 and the second slider 42 are both structures in which a motor cooperates with a driving wheel, so as to realize the sliding of the first slider 41 and the second slider 42. The driving structure is a prior art and will not be described in detail here.

[0068] like Fig. 9 , Fig.10 and Fig.11 As shown, the suction unit includes a conveying seat 43, a second suction cup 44 and a third air pipe 45. The conveying seat 43 is fixedly mounted on the second slider 42. The conveying seat 43 is a square plate-like structure. Four second suction cups 44 are arranged at the bottom of the conveying seat 43. The lower surface of the second suction cup 44 is flush with the bottom surface of the conveying seat 43. A third air pipe 45 is arranged on the upper surface of the conveying seat 43. The third air pipe 45 is connected to all the second suction cups 44, and an air pump is connected to the third air pipe 45. The air pump can generate suction force on the second suction cup 44 through the operation of the air pump, so as to absorb the protective film.

[0069] The conveying seat 43 is provided with two rectangular second through holes 64 extending vertically and extending therethrough at the front and rear positions of the second suction cup 44, and the conveying seat 43 is provided with first through holes 55 extending vertically and extending therethrough at the left and right positions of the second suction cup 44. The bottom of the conveying seat 43 is provided with a downwardly opening accommodating cavity 65 (such as Fig. 9 and Fig.11 as shown).

[0070] The smoothing unit includes a housing 50 , a cylinder 51 , a lifting frame 52 , a first lead screw 60 , a sliding rod 61 , a connecting frame 62 and a smoothing member 63 .

[0071] The shell 50 is fixedly mounted on the upper surface of the conveying seat 43, the cylinder 51 is fixedly mounted above the shell 50, and the telescopic part of the cylinder 51 extends downward to the inside of the shell 50, and the telescopic part of the cylinder 51 is fixedly mounted with a lifting frame 52, which is a U-shaped structure.

[0072] A first lead screw 60 is rotatably mounted on the inner side of the lifting frame 52 near the rear side, the threads on both sides of the first lead screw 60 rotate in opposite directions, the axis of the first lead screw 60 is horizontally arranged in the left-right direction, and a motor driving the first lead screw 60 to rotate is mounted on one end of the first lead screw 60. A slide bar 61 is fixedly mounted on the inner side of the lifting frame 52 near the front side, and the axis of the slide bar 61 is parallel to the axis of the first lead screw 60.

[0073] Two connecting frames 62 are arranged on the left and right sides of the lifting frame 52. The connecting frames 62 are U-shaped structures. One end of the connecting frame 62 is threadedly connected to the first lead screw 60, and the other end of the connecting frame 62 is slidably matched with the slide rod 61. The first lead screw 60 can drive the two connecting frames 62 to move closer to each other or away from each other.

[0074] Two opposite side plates of the connecting frame 62 pass through corresponding second through holes 64 respectively. The second through holes 64 are rectangular structures, which can ensure that the two connecting frames 62 can move left and right.

[0075] In the initial state, the two connecting frames 62 are abutted together, and the panels at the bottom of the two connecting frames 62 are located inside the accommodating cavity 65. It is particularly noted that the plurality of second suction cups 44 are evenly distributed on both sides of the accommodating cavity 65, that is, two second suction cups 44 are evenly spaced on both sides of the accommodating cavity 65, so that the second suction cups 44 on both sides can adsorb and fix the protective film near the two ends.

[0076] A smoothing member 63 is fixedly mounted on the bottom surface of the two connecting frames 62 . In this embodiment, the cross-section of the smoothing member 63 is a semicircular structure. In other embodiments, the smoothing member 63 may also be a roller rotatably mounted on the connecting frame 62 .

[0077] When the cylinder 51 drives the lifting frame 52 to descend, the lifting frame 52 will simultaneously drive the connecting frame 62 to descend, so that the smoothing member 63 descends and leaves the accommodating chamber 65, that is, the smoothing member 63 is located under the conveying seat 43, and then the first screw 60 rotates to drive the two connecting frames 62 to move to both sides (away from each other), thereby attaching the protective film to the SUS plate. The attachment process will be described in detail later.

[0078] The negative pressure unit includes an air collecting box 53 and air holes 54 .

[0079] Air collecting boxes 53 are fixedly installed on the opposite side panels of the lifting frame 52. In the initial state, the lower end surface of the air collecting box 53 is flush with the bottom of the conveying seat 43. When the cylinder 51 drives the lifting frame 52 to rise and fall, the air collecting box 53 can extend to the bottom of the conveying seat 43 through the first through hole 55, and the air hole 54 leaks out. The air collecting box 53 is connected to an air pump, and an exhaust hole 54 is provided on the opposite surface of the air collecting box 53 and near the bottom. When the air pump is working, it can inhale air through the air hole 54.

[0080] In the initial state, the conveying module is located at the left position, and the conveying seat 43 is located directly above the flip plate 21. When the flip plate 21 flips the protective film over and completes the positioning, the first suction cup 22 adsorbs the protective film again, and then the second slider 42 drives the conveying seat 43 to descend. At the same time, the cylinder 51 also drives the gas collecting box 53 to descend, so that the lower end surface of the gas collecting box 53 is lower than the lower end surface of the conveying seat 43, but the smoothing piece 63 is still in the accommodating chamber 65. After the conveying seat 43 descends to the bottom, there is still a certain distance from the protective film. The gas collecting boxes 53 on both sides squeeze the positioning plate 30 and the limit block 37 downward respectively, so that the air holes 54 on the gas collecting boxes 53 on both sides face the upper surface of the protective film. Then the air pumps connected to the gas collecting boxes 53 on both sides work at the same time. At this time, the state of the air pump is blowing. The gas blows the gas from the air holes 54 on both sides to the upper surface of the protective film, and blows off the dust and impurities attached to the upper surface during the flipping process of the protective film, thereby improving the quality of the product. After the cleaning is completed, the conveying seat 43 continues to descend, so that the second suction cup 44 contacts the protective film, and then the first suction cup 22 stops working, and the second suction cup 44 works to absorb the protective film to the bottom of the conveying seat 43, and at the same time the air collecting box 53 rises and resets.

[0081] Then the first slider 41 drives the conveying seat 43 and the protective film to move to the right, and in the process of movement, it passes through the surface treatment module 12 and the camera module 13 in turn before reaching the SUS board bearing module. When passing through the surface treatment module 12, the surface of the protective film is treated to increase the adhesion of the protective film, and then when passing through the camera module 13, the protective film is photographed and finally reaches the SUS board bearing module. At the same time, the SUS board feeding mechanism on the rear side of the base 10 will convey the SUS board to the bearing platform 70.

[0082] Then the conveying seat 43 begins to descend, and at the same time, the cylinder 51 drives the lifting frame 52 to descend, the air collecting box 53 and the smoothing piece 63 descend at the same time, and the smoothing piece 63 descends and leaves the accommodating chamber 65. When the smoothing piece 63 descends and leaves the accommodating chamber 65, it will push the center position of the protective film downward, but the second suction cups 44 on both sides still maintain suction on the protective film, so the two sides of the protective film are still tightly attached to the bottom of the conveying seat 43. As the conveying seat 43 descends, the air collecting boxes 53 on both sides will squeeze the fixing frame 72 downward until the air holes 54 on the air collecting box 53 are facing the upper surface of the SUS plate. At this time, the protective film pushed by the smoothing piece 63 has already contacted the SUS plate, that is, the center position of the protective film first contacts the SUS plate, and there is still a gap between the protective film and the SUS plate on both sides of the smoothing piece 63. Then the air pumps on the air collecting boxes 53 on both sides work simultaneously. At this time, the air pumps are in the suction state, and the air holes 54 on both sides respectively suck air from the gap between the SUS plate and the protective film, continuously sucking out the air between the protective films on both sides and the SUS plate, so that a negative pressure environment is formed between the protective films on both sides and the SUS plate.

[0083] Then the first screw 60 rotates, driving the two connecting frames 62 to move to the left and right sides respectively, so that the two smoothing members 63 move to the sides respectively, and the protective film is gradually attached to the SUS board from the center position to the sides. Since there is a negative pressure environment between the protective films on both sides and the SUS board, the protective film can be better attached to the SUS board without generating bubbles. Moreover, in the process of the two smoothing members 63 pushing the protective film to both sides respectively, the second suction cups 44 on both sides always maintain suction on the protective film, that is, the protective film always maintains tension and is in a stretched state until the protective film is detached from the second suction cup 44 and attached to the SUS board, which effectively avoids wrinkles in the protective film and ensures the quality of the product.

[0084] It is particularly emphasized that when the smoothing member 63 presses the middle position of the protective film onto the SUS board, the protective film will be deformed to a certain extent because the two ends of the protective film are adsorbed by the second suction cup 44, that is, the protective film will be stretched, but the distance between the protective film and the SUS board is very small, so the deformation of the protective film is also very small. When the smoothing member 63 moves to the two ends of the protective film respectively, the suction force of the second suction cup 44 on the protective film can ensure that the protective film is separated from the second suction cup 44 when the smoothing member 63 moves. It is also possible that when the smoothing member 63 moves to the two ends of the protective film respectively, the suction force of the second suction cup 44 on the protective film is reduced, thereby ensuring that the protective film is separated from the second suction cup 44.

[0085] Then, the second suction cup 44 on the conveying seat 43 conveys the SUS plate with the film attached to the discharging module 14 , and the discharging module 14 conveys the SUS plate with the film attached to the next process.

[0086] Although the embodiments of the present invention have been shown and described above, it is to be understood that the above embodiments are exemplary and are not to be construed as limitations of the present invention. A person skilled in the art may change, modify, replace and vary the above embodiments within the scope of the present invention.

Claims

1. A protective film automatic feeding device, comprising: A base and a protective film feeding module and a SUS board bearing module arranged on the base; characterized in that the base is also provided with a conveying module for conveying the protective film and placing the protective film on the SUS board, and the conveying module includes a suction unit, a driving unit and a smoothing unit; The suction unit includes a conveying seat and two groups of suction cups arranged at the bottom of the conveying seat, and the two groups of suction cups are used to absorb the edges of the opposite sides of the protective film; the driving unit is connected to the conveying seat and drives the conveying seat to rise and fall and translate; the smoothing unit includes a shell fixedly arranged on the top of the conveying seat, a lifting frame vertically movably installed on the shell, and a smoothing component horizontally slidably assembled on the lifting frame, and the sliding direction of the smoothing component is the spacing arrangement direction of the two groups of suction cups. The smoothing component includes a connecting frame arranged on the lifting frame and passing through the conveying seat up and down, and a smoothing member arranged at the bottom of the connecting frame; The moving stroke of the two smoothing pieces has an intermediate position close to each other, and the bottom of the conveying seat has a accommodating cavity for accommodating the two smoothing pieces in the intermediate position. The lifting frame is used to drive the two smoothing pieces in the intermediate position to move downward and press the protective film onto the SUS plate. The moving stroke of the two smoothing pieces includes a smoothing stroke of moving from the intermediate position to both sides and attaching the protective film to the SUS plate.

2. The automatic feeding device for protective film according to claim 1, characterized in that: The lifting frame is also provided with a negative pressure unit, which includes two air collecting boxes fixed to the lifting frame and arranged on both sides of the smoothing member. The conveying seat is provided with an avoidance through-hole for the air collecting boxes to pass through. The air collecting box is connected to a suction member, and air holes are provided on opposite surfaces of the air collecting boxes.

3. The automatic feeding device for protective film according to claim 1, characterized in that: The protective film loading module includes a bracket fixedly mounted on the base, a flip plate is rotatably mounted on the inner side of the bracket, the flip plate rotates along an axis extending in the front-rear direction, a first suction cup is arranged on the upper surface of the flip plate, an L-shaped positioning plate is vertically elastically slidably mounted on the flip plate, two limit blocks are also horizontally slidably mounted on the flip plate, a driving structure for driving the limit blocks to move is mounted at the bottom of the flip plate, and the two limit blocks slide toward the two surfaces of the positioning plate respectively to position the protective film.

4. The automatic feeding device for protective film according to claim 3, characterized in that: The driving structure includes a fixed seat arranged at the bottom of the flip plate, and two air passages are arranged horizontally left and right and front and back in the fixed seat, and the two air passages are connected to each other. Sliding parts are installed in the two air passages in a horizontal and sealed sliding manner, and the sliding part is connected to the flip plate through a spring at one end away from the air passage. An air pump is connected to the air passage, and the limit blocks are vertically elastically slidably connected to the sliding parts.

5. The automatic feeding device for protective film according to claim 1, characterized in that: The SUS board bearing module comprises a bearing platform which is horizontally slidably mounted on the base, and a fixing frame which is vertically elastically slidably mounted on the bearing platform, and the fixing frame is a U-shaped structure.

6. The automatic feeding device for protective film according to claim 1, characterized in that: The driving unit includes a first lead screw horizontally mounted on a lifting frame, a sliding rod fixedly mounted on the lifting frame, the first lead screw is parallel to the axis of the sliding rod, two connecting frames that are both slidably matched with the sliding rod are screwed on the first lead screw, the connecting frame is a U-shaped structure, and the smoothing piece is fixedly mounted on the bottom of the connecting frame.

7. The automatic feeding device for protective film according to any one of claims 1 to 6, characterized in that: The cross section of the smoothing member is a semicircular structure.

8. The automatic feeding device for protective film according to claim 6, characterized in that: The driving unit comprises a mounting frame fixedly mounted on the base, a first sliding block is horizontally slidably mounted on the mounting frame, a second sliding block is vertically slidably mounted on the first sliding block, and a conveying seat is fixedly mounted on the second sliding block.

9. The automatic feeding device for protective film according to claim 7, characterized in that: A cylinder is fixedly mounted on the conveying seat, and a lifting frame is fixedly mounted on the telescopic part of the cylinder.

10. The automatic feeding device for protective film according to claim 2, characterized in that: The suction member is an air pump fixedly mounted on the lifting frame.

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