An undercutting device and undercutting process for a foam protective film

Abstract

The present invention belongs to the technical field of cutting equipment, and discloses a lower cutting device and a lower cutting process for a foam protective film, including a bottom plate, a first cutting opening, a second cutting opening and a rotating structure. The middle parts and the front and rear ends of both sides of the top of the bottom plate are respectively fixedly connected with an electric hydraulic rod and a first limiting column. Through the cooperation among structures such as the rotating structure, the cutting mechanism, the first cutting opening and the second cutting opening, the device has the function of preventing wrinkles from being generated during the cutting of the foam protective film, which reduces the quality of the foam protective film. When the hollow connecting cylinder moves upward, the threaded collar will move upward. At this time, when the hollow connecting cylinder continues to move upward, the cooperation between the inner cutting block and the inner cavity of the second cutting opening will realize the secondary stamping of the small piece of foam protective film body. At this time, the small piece of foam protective film body will not easily wrinkle, thereby improving the cutting quality of the device for the foam protective film body.

Description

Technical Field

[0001] The present invention belongs to the technical field of cutting equipment, and particularly relates to a lower cutting device and a lower cutting process for a foam protective film. Background Art

[0002] During the assembly, testing, and transportation of mobile phone cameras, in order to protect the camera lens, it is generally necessary to attach a protective film to the module lens to prevent the module lens from being scratched and avoid soiling and dust contamination of the module lens. After the mobile phone module lens is manufactured, the protective film needs to be pasted. As shown in the following attachment Figure 11 and attachment Figure 12 In the shown lower cutting process, the mold cuts in from the surface of the silicone tape, and the surface of the high-transparency film will not be touched inside the knife cavity, effectively avoiding soiling and creases on the surface of the high-transparency film.

[0003] For example, the utility model with the publication number CN209036715U discloses a stamping and film-cutting device for electronic product functional films. Its upper pressure plate is located below the upper template. At least two first guide posts installed on the upper template are respectively embedded in the upper through holes of the upper pressure plate. An intermediate plate is located above the lower template. There is a gap between this intermediate plate and the lower template for the micro-adhesive film to be embedded. A punch is installed on the upper template. On the intermediate plate, material tape positioning posts are respectively arranged on both sides of the punch through hole. The material tape to be processed is located between the material tape positioning posts on both sides. The lower template is provided with lower through holes for the first guide posts to be embedded. A groove is opened on the lower template directly below the punch through hole, and a buffer rubber pad is arranged in the groove. When the film of the present utility model is cut, it not only prevents the punch from being damaged due to the force exerted on the lower template when the punch presses down, thus playing a role in protecting the punch, but also makes the cut product not wrinkle and avoids the cut edge being serrated.

[0004] Another example is the utility model with the publication number CN213733375U. The present utility model relates to the technical field of stamping film production and processing, and discloses an adjustable flattening mechanism for stamping film production, including a base. The upper surface of the base is fixedly connected with a bottom plate, and the upper surface of the bottom plate is fixedly connected with a plurality of sliding rods. One end of the plurality of sliding rods away from the bottom plate is provided with a pressure plate, and the plurality of sliding rods all penetrate through the pressure plate and are arranged on the upper surface of the pressure plate. The sliding rods located on the upper surface of the pressure plate are all fixedly connected with a cover plate, and an electric push rod is fixedly connected to the lower surface of the cover plate. The end of the electric push rod away from the cover plate is fixedly connected with the pressure plate. In the present utility model, the electric push rod for stamping drives the stop block, so that the stop block first presses on the bottom plate, and then the product is rolled and flattened by the pressure roller, avoiding the drawback that the operator needs to manually flatten the stamping film before stamping, increasing the speed of stamping production products. At the same time, the stop block can block the stamping film when the stamping film passes through the pressure roller, avoiding the stamping film falling off the platform flattened by the flattening mechanism.

[0005] When the existing device cuts the foam protective film, it often uses the stamping cutting method. However, when the stamping block contacts the foam, the area of the foam protective film before cutting is relatively large at this time. As a result, when the stamping block cuts the foam protective film, the foam protective film around the stamping block that is not in contact with the stamping block wrinkles, and then the outer ring at the contact between the stamping block and the foam protective film wrinkles, thus reducing the cutting quality of the foam protective film. Therefore, a lower cutting device and a lower cutting process for the foam protective film are proposed to solve the problems raised in the background technology. Summary of the Invention

[0006] (1) Technical problems to be solved

[0007] To solve the problems raised in the above background technology, the present invention provides a lower cutting device and a lower cutting process for the foam protective film, which solves the problem of wrinkling when the existing device cuts the foam protective film, and has the advantage of preventing the structure from causing wrinkles when cutting the foam protective film and reducing the quality of the foam protective film.

[0008] (2) Technical solutions

[0009] To achieve the above object, the present invention provides the following technical solutions: A lower cutting device for a foam protective film, including a bottom plate, a first cutting opening, a second cutting opening, and a rotating structure. The middle parts and the front and rear ends of both sides of the top of the bottom plate are respectively fixedly connected with electric hydraulic rods and first limit columns. The outer surface of the first limit column is sleeved with a concave plate and a first elastic spring. The inner cavity of the concave plate is fixedly connected with hollow connecting cylinders at equal distances. The top of the inner cavity of the hollow connecting cylinder is movably connected with a rotating structure. The outer surface of the rotating structure is sleeved with a threaded collar and a second elastic spring. The top of the second elastic spring is fixedly connected with a cutting mechanism. The front end and the rear end of the bottom plate are fixedly connected with support frames at equal distances. The top of the inner side of the support frame is fixedly connected with an upper plate. The lower plate is placed on the upper surface of the inner side of the support frame;

[0010] The rotating structure includes a connecting rod. The bottom of the outer surface of the connecting rod is movably connected with the top of the inner cavity of the hollow connecting cylinder. The middle upper part of the outer surface of the connecting rod is fixedly connected with a threaded raised block. The two sides of the top of the outer surface of the connecting rod are fixedly connected with convex blocks;

[0011] The cutting mechanism includes an outer cutting block. The bottom of the outer cutting block is fixedly connected with the top of the second elastic spring. The inner cavity of the outer cutting block is movably connected with an inner cutting block. The inner cavity of the outer cutting block is provided with a vertical groove and a quarter arc groove.

[0012] In the above technical solution, preferably, communication chambers are equidistantly arranged at the front and rear ends inside the upper plate. The inner cavities of the upper plate and the lower plate are respectively and equidistantly movably connected with a first conveying roller and a second conveying roller. The inner cavities of the communication chambers are all movably connected with clamping blocks. The front and rear ends of the top of the lower plate are respectively and equidistantly fixedly connected with T-shaped blocks. The top of the inner side of the support frame is fixedly connected with a second limiting column. A foam protective film body is placed on the upper surface of the second conveying roller.

[0013] In the above technical solution, preferably, collecting blocks are equidistantly magnetically connected to the front and rear ends of the top of the upper plate. The inner cavity of the collecting block is movably connected with movable blocks in an annular and equiangular manner. The outer side of the movable block is fixedly connected with a spring piece. The inner side of the movable block is fixedly connected with an arc block.

[0014] In the above technical solution, preferably, the top of the first limiting column is movably connected with the inner cavity of the bottom of the bottom plate. The two sides of the bottom of the concave plate are respectively fixedly connected with the top of the electro-hydraulic rod. The inner cavity of the threaded collar is matched with the threaded raised block. The bottom of the second elastic spring is movably connected with the top of the threaded collar. The top of the connecting rod is movably connected with the inner cavity of the inner cutting block.

[0015] In the above technical solution, preferably, the outer surface of the convex block is respectively matched with the vertical groove and the quarter arc groove. The first cutting opening and the second cutting opening are both arranged on the upper plate directly above the cutting mechanism. The second cutting opening is directly above the first cutting opening. The inner cavity of the second cutting opening is matched with the inner cutting block. The outer cutting block is matched with the inner cavity of the first cutting opening.

[0016] In the above technical solution, preferably, the outer surface of the second limiting column is movably connected with the inner cavity of the lower plate. The front and rear ends of the outer surface of the first conveying roller are tooth-shaped. One end of the clamping block close to the first conveying roller is clamped with the tooth-shaped part on the first conveying roller.

[0017] In the above technical solution, preferably, the top of the outer surface of the T-shaped block is movably connected with the inner cavity of the communication chamber. The top of the foam protective film body contacts the lower surface of the first conveying roller. The first conveying roller and the second conveying roller are both made of silica gel material. There are gaps between the two sides of the first conveying roller and the second conveying roller located in the inner cavities of the upper plate and the lower plate and the upper plate and the lower plate respectively.

[0018] In the above technical solution, preferably, the bottom of the collecting block is made of magnet material. The bottom of the collecting block is matched with the inner cavity of the top of the upper plate.

[0019] In the above technical solution, preferably, the end of the spring piece away from the movable block is fixedly connected with the inner cavity of the collecting block. The arc block is made of silica gel material.

[0020] A cutting process for a foam protective film, the steps of which include:

[0021] S: First, the operator operates the electro-hydraulic rod, which will cause the concave plate to move upward. At this time, the concave plate will drive the hollow connecting cylinder, the rotating structure and the cutting mechanism to move upward. At the same time, the first elastic spring will be compressed, and then the lower plate will drive the second conveying roller, the T-shaped block and the foam protective film body to move upward. At this time, the top of the T-shaped block will squeeze the gas inside the communication chamber. At this time, the air pressure inside the communication chamber will increase, and then the clamping block will move towards the end close to the teeth of the first conveying roller. When the clamping block is clamped with the first conveying roller, the first conveying roller will stop driving the foam protective film body to move, playing a preliminary fixing role for the foam protective film body. At this time, with the upward movement of the first elastic spring driven by the concave plate, finally, the opposite sides of the upper plate and the lower plate will contact the top and bottom of the foam protective film body respectively, thus completing the secondary fixing of the foam protective film body;

[0022] S: When the hollow connecting cylinder moves upward, it will cause the threaded collar to move upward. At this time, due to the elastic force of the second elastic spring, the cutting mechanism will move upward. At this time, the outer cutting block and the inner cutting block will contact the bottom of the foam protective film body, so that the cooperation between the outer cutting block and the bottom of the first cutting opening realizes the first stamping of the foam protective film body to obtain small pieces of the foam protective film body. When the top of the quarter arc groove contacts the top of the inner cavity of the first cutting opening, the outer cutting block is blocked. At the same time, the threaded collar continues to move upward, and the second elastic spring continues to be compressed. When the inner cavity of the threaded collar cooperates with the threaded protrusion block, the connecting rod will drive the convex block to rotate, so that the convex block rotates from the quarter arc groove to the vertical groove. At this time, when the hollow connecting cylinder continues to move upward, the cooperation between the inner cutting block and the inner cavity of the second cutting opening realizes the secondary stamping of the small pieces of the foam protective film body. At this time, because the area of the foam protective film body is small, the small pieces of the foam protective film body will not easily wrinkle, thus improving the cutting quality of the device for the foam protective film body;

[0023] S: When the top of the inner cutting block passes through the second cutting opening, the cut foam protective film body is obtained. At this time, the foam protective film body will be sent into the inside of the collecting block by the inner cutting block. At this time, both the foam protective film body and the inner cutting block will contact the bottommost arc block. When the inner cutting block moves downward, the cut foam protective film body will contact the arc block, thus realizing the collection of the cut foam protective film body. When the next cut foam protective film body is conveyed into the collecting block, at this time, the cut foam protective film body above will be pushed to the upper arc blocks by the cut foam protective film body below and contact the arc blocks, thus realizing the collection of the foam protective film body after multiple cuts.

[0024] (III) Beneficial effects

[0025] Compared with the prior art, the beneficial effects of the present invention are as follows:

[0026] Through the cooperation among structures such as the rotating structure, the cutting mechanism, the first cutting opening, and the second cutting opening, the device of the present invention can prevent wrinkles from being generated during the cutting of the foam protective film, which may reduce the quality of the foam protective film. When the hollow connecting cylinder moves upward, the threaded collar will move upward. At this time, due to the elastic force of the second elastic spring, the cutting mechanism will move upward. At this time, the outer cutting block and the inner cutting block will contact the bottom of the foam protective film body, so that the cooperation between the outer cutting block and the bottom of the first cutting opening can perform the first stamping on the foam protective film body to obtain small pieces of the foam protective film body. When the top of the quarter arc groove contacts the top of the inner cavity of the first cutting opening, the outer cutting block is blocked. At the same time, the threaded collar continues to move upward, and the second elastic spring continues to be compressed. When the inner cavity of the threaded collar cooperates with the threaded convex block, the connecting rod drives the convex block to rotate, so that the convex block rotates from the quarter arc groove into the vertical groove. At this time, when the hollow connecting cylinder continues to move upward, the cooperation between the inner cutting block and the inner cavity of the second cutting opening can perform the secondary stamping on the small pieces of the foam protective film body. At this time, since the area of the foam protective film body is small, the small pieces of the foam protective film body are not likely to wrinkle, thus improving the cutting quality of the device for the foam protective film body;

[0027] Through the cooperation among structures such as the upper plate, the first conveying roller, the clamping block, and the second conveying roller, the device of the present invention can prevent the foam protective film from moving during cutting. By operating the electro-hydraulic rod, the concave plate will move upward. At this time, the concave plate will drive the hollow connecting cylinder, the rotating structure, and the cutting mechanism to move upward. At the same time, the first elastic spring will be compressed, so that the lower plate drives the second conveying roller, the T-shaped block, and the foam protective film body to move upward. At this time, the top of the T-shaped block will squeeze the gas inside the communication chamber, and the air pressure inside the communication chamber will increase, so that the clamping block moves toward the end close to the teeth of the first conveying roller. When the clamping block is clamped with the first conveying roller, the first conveying roller stops driving the foam protective film body to move, playing a role in initially fixing the foam protective film body. At this time, with the upward movement of the first elastic spring driven by the concave plate, finally, the opposite sides of the upper plate and the lower plate respectively contact the top and the bottom of the foam protective film body, thus completing the secondary fixation of the foam protective film body, facilitating the subsequent cutting of the foam protective film body by the device;

[0028] Through the cooperation among structures such as a collection block, a movable block, and an arc block, the device of the present invention can collect the cut foam protective film. The cut foam protective film body is obtained by passing the top of the inner cutting block through the second cutting opening. At this time, the foam protective film body will be sent into the interior of the collection block by the inner cutting block. At this time, both the foam protective film body and the inner cutting block will contact the bottommost arc block. When the inner cutting block moves downward, the cut foam protective film body will contact the arc block, thereby realizing the collection of the cut foam protective film body. When the next cut foam protective film body is conveyed into the interior of the collection block, at this time, the cut foam protective film body above will be pushed by the cut foam protective film body below to the upper arc blocks and contact the arc blocks, thereby realizing the collection of the foam protective film bodies that have been cut multiple times, which is convenient for the operator to use. BRIEF DESCRIPTION OF THE DRAWINGS

[0029] Figure 1 is a schematic diagram of the overall structure of the present invention;

[0030] Figure 2 is a schematic diagram of the front cross-sectional structure of the present invention;

[0031] Figure 3 is Figure 2 an enlarged view of part A in

[0032] Figure 4 is a schematic diagram of the external structure of the first limit post of the present invention;

[0033] Figure 5 is an exploded view of the hollow connecting cylinder of the present invention;

[0034] Figure 6 is an exploded view of the cutting mechanism of the present invention;

[0035] Figure 7 is a schematic diagram of the cross-sectional structure of the communication chamber of the present invention;

[0036] Figure 8 is Figure 7 an enlarged view of part B in

[0037] Figure 9 is a schematic diagram of the structure of the second limit post of the present invention;

[0038] Figure 10 is a quarter cross-sectional structure diagram of the collection block of the present invention;

[0039] Figure 11 is a foam processing drawing (down-cutting process, the mold T1T2 cuts from bottom to top);

[0040] Figure 12It is the structural layer of the foam product (the lower cutting process cuts in from the surface of the silicone tape).

[0041] In the figure: 1. bottom plate; 2. electric hydraulic rod; 3. concave plate; 4. first limit post; 5. first elastic spring; 6. hollow connecting cylinder; 7. threaded collar; 8. rotating structure; 801. connecting rod; 802. convex block; 803. threaded convex block; 9. cutting mechanism; 901. outer cutting block; 902. inner cutting block; 903. vertical groove; 904. quarter arc groove; 10. second elastic spring; 11. upper plate; 12. first conveying roller; 13. foam protective film body; 14. lower plate; 15. T-shaped block; 16. communication chamber; 17. clamping block; 18. second conveying roller; 19. support frame; 20. second limit post; 21. collecting block; 22. spring piece; 23. movable block; 24. arc block; 25. first cutting opening; 26. second cutting opening. Detailed implementation mode

[0042] Next, the technical solutions in the embodiments of the present invention will be clearly and completely described in conjunction with the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only a part of the embodiments of the present invention, rather than all the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without creative efforts shall fall within the protection scope of the present invention.

[0043] As Figures 1 to 12 shown, the present invention provides a lower cutting device for a foam protective film, including a bottom plate 1, a first cutting opening 25, a second cutting opening 26 and a rotating structure 8. The middle parts and the front and rear ends of the two sides of the top of the bottom plate 1 are respectively fixedly connected with an electric hydraulic rod 2 and a first limit post 4. An outer surface of the first limit post 4 is sleeved with a concave plate 3 and a first elastic spring 5. The inner cavity of the concave plate 3 is fixedly connected with hollow connecting cylinders 6 at equal intervals. The top of the inner cavity of the hollow connecting cylinder 6 is movably connected with a rotating structure 8. The outer surface of the rotating structure 8 is sleeved with a threaded collar 7 and a second elastic spring 10. The top of the second elastic spring 10 is fixedly connected with a cutting mechanism 9. The front end and the rear end of the bottom plate 1 are fixedly connected with support frames 19 at equal intervals. The top of the inner side of the support frame 19 is fixedly connected with an upper plate 11. A lower plate 14 is placed on the upper surface of the inner side of the support frame 19;

[0044] The rotating structure 8 includes a connecting rod 801. The bottom of the outer surface of the connecting rod 801 is movably connected with the top of the inner cavity of the hollow connecting cylinder 6. The middle upper part of the outer surface of the connecting rod 801 is fixedly connected with a threaded convex block 803. The two sides of the top of the outer surface of the connecting rod 801 are fixedly connected with convex blocks 802;

[0045] The cutting mechanism 9 includes an outer cutting block 901. The bottom of the outer cutting block 901 is fixedly connected to the top of the second elastic spring 10. An inner cutting block 902 is movably connected to the inner cavity of the outer cutting block 901. A vertical groove 903 and a quarter-arc groove 904 are formed in the inner cavity of the outer cutting block 901. When the hollow connecting cylinder 6 moves upward, the threaded collar 7 will move upward. At this time, due to the elastic force of the second elastic spring 10, the cutting mechanism 9 will move upward. At this time, the outer cutting block 901 and the inner cutting block 902 will contact the bottom of the foam protective film body 13, so that the cooperation between the outer cutting block 901 and the bottom of the first cutting opening 25 realizes the first stamping of the foam protective film body 13 to obtain small pieces of the foam protective film body 13. When the top of the quarter-arc groove 904 contacts the top of the inner cavity of the first cutting opening 25, the outer cutting block 901 is blocked at this time, and at the same time the threaded collar 7 continues to move upward, and the second elastic spring 10 continues to be compressed. When the inner cavity of the threaded collar 7 cooperates with the threaded protrusion block 803, the connecting rod 801 drives the convex block 802 to rotate, so that the convex block 802 rotates from the quarter-arc groove 904 into the vertical groove 903. At this time, when the hollow connecting cylinder 6 continues to move upward, the cooperation between the inner cutting block 902 and the inner cavity of the second cutting opening 26 realizes the secondary stamping of the small pieces of the foam protective film body 13. At this time, since the area of the foam protective film body 13 is small, the small pieces of the foam protective film body 13 will not easily wrinkle, thereby improving the cutting quality of the device for the foam protective film body 13.

[0046] Such as Figure 1 , Figure 2 , Figure 3 , Figure 4 , Figure 7 , Figure 9As shown in the figure, communication chambers 16 are equidistantly arranged at the front and rear ends inside the upper plate 11. The inner cavities of the upper plate 11 and the lower plate 14 are respectively and equidistantly movably connected with a first conveying roller 12 and a second conveying roller 18. The inner cavities of the communication chambers 16 are all movably connected with clamping blocks 17. The front and rear ends of the top of the lower plate 14 are respectively and equidistantly fixedly connected with T-shaped blocks 15. The top of the inner side of the support frame 19 is fixedly connected with a second limiting column 20. A foam protective film body 13 is placed on the upper surface of the second conveying roller 18; by operating the electric hydraulic rod 2, the concave plate 3 will move upward. At this time, the concave plate 3 will drive the hollow connecting cylinder 6, the rotating structure 8 and the cutting mechanism 9 to move upward. At the same time, the first elastic spring 5 will be compressed, so that the lower plate 14 drives the second conveying roller 18, the T-shaped block 15 and the foam protective film body 13 to move upward. At this time, the top of the T-shaped block 15 will squeeze the gas inside the communication chamber 16. At this time, the air pressure inside the communication chamber 16 will increase, so that the clamping block 17 moves toward one end close to the teeth of the first conveying roller 12. When the clamping block 17 is clamped with the first conveying roller 12, the first conveying roller 12 stops driving the foam protective film body 13 to move, playing a role in initially fixing the foam protective film body 13. At this time, with the upward movement of the first elastic spring 5 driven by the concave plate 3, finally, the opposite sides of the upper plate 11 and the lower plate 14 are respectively in contact with the top and bottom of the foam protective film body 13, thus completing the secondary fixation of the foam protective film body 13, which facilitates the subsequent cutting of the device.

[0047] As Figure 1 , Figure 2 , Figure 3 , Figure 7 , Figure 10 As shown in the figure, collecting blocks 21 are respectively and equidistantly magnetically connected to the front and rear ends of the top of the upper plate 11. The inner cavities of the collecting blocks 21 are annularly and equiangularly movably connected with movable blocks 23. The outer sides of the movable blocks 23 are fixedly connected with spring pieces 22. The inner sides of the movable blocks 23 are fixedly connected with arc blocks 24; when the top of the inner cutting block 902 passes through the second cutting opening 26, the cut foam protective film body 13 is obtained at this time. At this time, the foam protective film body 13 will be sent into the interior of the collecting block 21 by the inner cutting block 902. At this time, both the foam protective film body 13 and the inner cutting block 902 will contact the bottommost arc block 24. When the inner cutting block 902 moves downward, the cut foam protective film body 13 will contact the arc block 24 at this time, so as to realize the collection of the cut foam protective film body 13. When the next cut foam protective film body 13 is conveyed into the collecting block 21, at this time, the cut foam protective film body 13 above will be pushed to the arc blocks 24 above by the cut foam protective film body 13 below and contact the arc blocks 24, so as to realize the collection of the foam protective film body 13 after multiple cuts.

[0048] AsFigure 1 , Figure 2 , Figure 3 , Figure 4 , Figure 5 , Figure 6 , Figure 7 , Figure 9 As shown in Figure 9 , the top of the first limit post 4 is movably connected to the inner cavity of the bottom of the bottom plate 1. The two sides of the bottom of the concave plate 3 are respectively fixedly connected to the top of the electric hydraulic rod 2. The inner cavity of the threaded collar 7 is matched with the threaded protrusion block 803. The bottom of the second elastic spring 10 is movably connected to the top of the threaded collar 7. The top of the connecting rod 801 is movably connected to the inner cavity of the inner cutting block 902. The outer surface of the protrusion block 802 is respectively matched with the vertical groove 903 and the quarter arc groove 904. The first cutting opening 25 and the second cutting opening 26 are both opened on the upper plate 11 directly above the cutting mechanism 9. The second cutting opening 26 is directly above the first cutting opening 25. The inner cavity of the second cutting opening 26 is matched with the inner cutting block 902. The outer cutting block 901 is matched with the inner cavity of the first cutting opening 25. Initially, due to the cooperation between the protrusion block 802 and the quarter arc groove 904, when the rotating structure 8 moves upward, it drives the cutting mechanism 9 to move upward. When the top of the outer cutting block 901 contacts the top of the inner cavity of the first cutting opening 25, the cooperation between the threaded protrusion block 803 and the inner cavity of the threaded collar 7 causes the connecting rod 801 to drive the protrusion block 802 to rotate, making the protrusion block 802 cooperate with the vertical groove 903. At the same time, under the action of the elastic force of the second elastic spring 10, the cutting mechanism 9 moves upward, preventing the inner cutting block 902 from popping out when the outer cutting block 901 cuts the foam protective film body 13.

[0049] It should be noted here that the elastic force when the second elastic spring 10 is compressed satisfies the first cutting of the outer cutting block 901 on the foam protective film body 13.

[0050] As Figure 1 , Figure 2 , Figure 3 , Figure 4 , Figure 7 , Figure 9As shown in the figure, the outer surface of the second limiting post 20 is movably connected to the inner cavity of the lower plate 14. The front and rear ends of the outer surface of the first conveying roller 12 are tooth-shaped. One end of the clamping block 17 close to the first conveying roller 12 is clamped and engaged with the tooth-shaped part on the first conveying roller 12. The top of the outer surface of the T-shaped block 15 is movably connected to the inner cavity of the communication chamber 16. The top of the foam protective film body 13 is in contact with the lower surface of the first conveying roller 12. Both the first conveying roller 12 and the second conveying roller 18 are made of silica gel material. There are gaps between both sides of the first conveying roller 12 and the second conveying roller 18 located in the inner cavities of the upper plate 11 and the lower plate 14 and the upper plate 11 and the lower plate 14 respectively; due to the design that both the first conveying roller 12 and the second conveying roller 18 are made of silica gel material, on the relatively side of the first conveying roller 12 and the second conveying roller 18, due to the extrusion effect, they will be filled into the remaining gaps between the upper plate 11 and the lower plate 14 respectively. Furthermore, when the upper plate 11 and the lower plate 14 fix the top and bottom of the foam protective film body 13 respectively, the situation of uneven force when the foam protective film body 13 is squeezed caused by the first conveying roller 12 and the second conveying roller 18 being relatively convex with respect to the upper plate 11 and the lower plate 14 is prevented;

[0051] It should be noted here that: the silica gel material is relatively soft, and thus it is relatively easy to deform and fill the gap between the upper plate 11 and the lower plate 14.

[0052] Such as Figure 1 、 Figure 2 、 Figure 3 、 Figure 7 、 Figure 10 As shown in the figure, the bottom of the collection block 21 is made of magnet material. The bottom of the collection block 21 is matched with the inner cavity of the top of the upper plate 11. One end of the spring piece 22 far from the movable block 23 is fixedly connected to the inner cavity of the collection block 21. The arc block 24 is made of silica gel material; by clamping the bottom of the collection block 21 into the inner cavity of the top of the upper plate 11 and at the same time making the bottom of the collection block 21 adsorbed on the top of the upper plate 11, when the inner part of the collection block 21 is filled with the cut foam protective film body 13, it is convenient for the operator to take out the cut foam protective film body 13, which facilitates the use of the operator.

[0053] The working principle and usage process of the present invention:

[0054] A lower cutting process for a foam protective film, the steps of which are as follows:

[0055] First, the operator operates the electric hydraulic rod 2, which will cause the concave plate 3 to move upward. At this time, the concave plate 3 will drive the hollow connecting cylinder 6, the rotating structure 8, and the cutting mechanism 9 to move upward. At the same time, the first elastic spring 5 will be compressed, and then the lower plate 14 will drive the second conveying roller 18, the T-shaped block 15, and the foam protective film body 13 to move upward. At this time, the top of the T-shaped block 15 will squeeze the gas inside the communication chamber 16. At this time, the air pressure inside the communication chamber 16 will increase, and then the clamping block 17 will move toward the end close to the teeth of the first conveying roller 12. When the clamping block 17 is clamped with the first conveying roller 12, at this time, the first conveying roller 12 stops driving the foam protective film body 13 to move, playing a preliminary fixing role for the foam protective film body 13. At this time, with the upward movement of the first elastic spring 5 driven by the concave plate 3, finally, the opposite sides of the upper plate 11 and the lower plate 14 are respectively in contact with the top and bottom of the foam protective film body 13, thus completing the secondary fixing of the foam protective film body 13;

[0056] When the hollow connecting cylinder 6 moves upward, it will cause the threaded collar 7 to move upward. At this time, due to the elastic force of the second elastic spring 10, the cutting mechanism 9 will move upward. At this time, the outer cutting block 901 and the inner cutting block 902 will be in contact with the bottom of the foam protective film body 13, so that the cooperation between the outer cutting block 901 and the bottom of the first cutting opening 25 realizes the first stamping of the foam protective film body 13 to obtain small pieces of the foam protective film body 13. When the top of the quarter arc groove 904 is in contact with the top of the inner cavity of the first cutting opening 25, at this time, the outer cutting block 901 is blocked, and at the same time, the threaded collar 7 continues to move upward, and the second elastic spring 10 continues to be compressed. When the inner cavity of the threaded collar 7 cooperates with the threaded protrusion block 803, the connecting rod 801 will drive the convex block 802 to rotate, so that the convex block 802 rotates from the quarter arc groove 904 into the vertical groove 903. At this time, when the hollow connecting cylinder 6 continues to move upward, the cooperation between the inner cutting block 902 and the inner cavity of the second cutting opening 26 realizes the secondary stamping of the small pieces of the foam protective film body 13. At this time, because the area of the foam protective film body 13 is small, the small pieces of the foam protective film body 13 will not easily wrinkle, thus improving the cutting quality of the device for the foam protective film body 13;

[0057] When the top of the inner cutting block 902 passes through the second cutting opening 26, the cut foam protective film body 13 is obtained. At this time, the foam protective film body 13 will be sent into the interior of the collection block 21 by the inner cutting block 902. At this time, both the foam protective film body 13 and the inner cutting block 902 will contact the bottom arc block 24. When the inner cutting block 902 moves downward, the cut foam protective film body 13 will contact the arc block 24, thereby realizing the collection of the cut foam protective film body 13. When the next cut foam protective film body 13 is conveyed into the interior of the collection block 21, at this time, the cut foam protective film body 13 above will be pushed by the cut foam protective film body 13 below to the space between the upper arc blocks 24 and contact the arc blocks 24, thereby realizing the collection of the foam protective film body 13 that has been cut multiple times.

[0058] It should be noted that in this article, relational terms such as first and second are only used to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any actual relationship or order between these entities or operations. Moreover, the term "comprising", "including" or any other variant thereof is intended to cover non-exclusive inclusion, so that a process, method, article or device comprising a series of elements not only includes those elements, but also includes other elements not expressly listed, or also includes elements inherent to such process, method, article or device.

[0059] Although the embodiments of the present invention have been shown and described, it will be understood by those of ordinary skill in the art that various changes, modifications, substitutions and variations can be made to these embodiments without departing from the principles and spirit of the present invention. The scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. An undercutting device for a foam protective film, comprising a bottom plate (1), a first cutting opening (25), a second cutting opening (26) and a rotating structure (8), characterized in that: On both sides of the top of the bottom plate (1), an electric hydraulic rod (2) and a first limiting column (4) are respectively fixedly connected to the middle and the front and rear ends. A concave plate (3) and a first elastic spring (5) are sleeved on the outer surface of the first limiting column (4). A hollow connecting cylinder (6) is fixedly connected to the inner cavity of the concave plate (3) at equal intervals. A rotating structure (8) is movably connected to the top of the inner cavity of the hollow connecting cylinder (6). A threaded collar (7) and a second elastic spring (10) are sleeved on the outer surface of the rotating structure (8). A cutting mechanism (9) is fixedly connected to the top of the second elastic spring (10). On the front and rear ends of the bottom plate (1), support frames (19) are fixedly connected at equal intervals. An upper plate (11) is fixedly connected to the top of the inner side of the support frames (19). A lower plate (14) is placed on the upper surface of the inner side of the support frames (19). The rotating structure (8) includes a connecting rod (801). The bottom of the outer surface of the connecting rod (801) is movably connected to the top of the inner cavity of the hollow connecting cylinder (6). A threaded protrusion block (803) is fixedly connected to the middle and upper part of the outer surface of the connecting rod (801). Blocks (802) are fixedly connected to both sides of the top of the outer surface of the connecting rod (801). The cutting mechanism (9) includes an outer cutting block (901). The bottom of the outer cutting block (901) is fixedly connected to the top of the second elastic spring (10). An inner cutting block (902) is movably connected to the inner cavity of the outer cutting block (901). A vertical groove (903) and a quarter arc groove (904) are formed in the inner cavity of the outer cutting block (901). The top of the first limiting column (4) is movably connected to the inner cavity of the bottom of the bottom plate (1). The two sides of the bottom of the concave plate (3) are respectively fixedly connected to the top of the electric hydraulic rod (2). The inner cavity of the threaded collar (7) is matched with the threaded protrusion block (803). The bottom of the second elastic spring (10) is movably connected to the top of the threaded collar (7). The top of the connecting rod (801) is movably connected to the inner cavity of the inner cutting block (902). The outer surfaces of the blocks (802) are respectively matched with the vertical groove (903) and the quarter arc groove (904). A first cutting opening (25) and a second cutting opening (26) are both formed in the upper plate (11) directly above the cutting mechanism (9). The second cutting opening (26) is directly above the first cutting opening (25). The inner cavity of the second cutting opening (26) is matched with the inner cutting block (902). The outer cutting block (901) is matched with the inner cavity of the first cutting opening (25).

2. The undercutting device for a foam protective film according to claim 1, characterized in that: The front and rear ends inside the upper plate (11) are equidistantly provided with communication chambers (16). The inner cavities of the upper plate (11) and the lower plate (14) are respectively and equidistantly movably connected with a first conveying roller (12) and a second conveying roller (18). The inner cavities of the communication chambers (16) are all movably connected with clamping blocks (17). The front and rear ends of the top of the lower plate (14) are respectively and equidistantly fixedly connected with T-shaped blocks (15). The top of the inner side of the support frame (19) is fixedly connected with a second limiting column (20). A foam protective film body (13) is placed on the upper surface of the second conveying roller (18).

3. The undercutting device for a foam protective film according to claim 2, characterized in that: The front and rear ends of the top of the upper plate (11) are respectively and equidistantly magnetically connected with collecting blocks (21). The inner cavity of the collecting block (21) is annularly and equiangularly movably connected with movable blocks (23). The outer side of the movable block (23) is fixedly connected with a spring piece (22). The inner side of the movable block (23) is fixedly connected with an arc-shaped block (24).

4. The undercutting device for a foam protective film according to claim 3, characterized in that: The outer surface of the second limiting column (20) is movably connected with the inner cavity of the lower plate (14). The front and rear ends of the outer surface of the first conveying roller (12) are tooth-shaped. One end of the clamping block (17) close to the first conveying roller (12) is in mating connection with the tooth-shaped part on the first conveying roller (12).

5. The undercutting device for a foam protective film according to claim 4, characterized in that: The top of the outer surface of the T-shaped block (15) is movably connected with the inner cavity of the communication chamber (16). The top of the foam protective film body (13) is in contact with the lower surface of the first conveying roller (12). Both the first conveying roller (12) and the second conveying roller (18) are made of silica gel material. There are gaps between both sides of the first conveying roller (12) and the second conveying roller (18) located in the inner cavities of the upper plate (11) and the lower plate (14) and the upper plate (11) and the lower plate (14) respectively.

6. The undercutting device for a foam protective film according to claim 5, characterized in that: The bottom of the collecting block (21) is made of magnet material. The bottom of the collecting block (21) is in mating connection with the inner cavity of the top of the upper plate (11).

7. The undercutting device for a foam protective film according to claim 6, characterized in that: One end of the spring piece (22) away from the movable block (23) is fixedly connected with the inner cavity of the collecting block (21). The arc-shaped block (24) is made of silica gel material.

8. A lower cutting process for a foam protective film, using a lower cutting device for a foam protective film as described in claim 7, the steps of which include: S1: First, the operator operates the electric hydraulic rod (2), which will cause the concave plate (3) to move upward. At this time, the concave plate (3) will drive the hollow connecting cylinder (6), the rotating structure (8) and the cutting mechanism (9) to move upward. At the same time, the first elastic spring (5) will be compressed, and then the lower plate (14) will drive the second conveying roller (18), the T-shaped block (15) and the foam protective film body (13) to move upward. At this time, the top of the T-shaped block (15) will squeeze the gas inside the communication chamber (16). At this time, the air pressure inside the communication chamber (16) will increase, and then the clamping block (17) will move toward the end close to the teeth of the first conveying roller (12). When the clamping block (17) is clamped with the first conveying roller (12), the first conveying roller (12) will stop driving the foam protective film body (13) to move, playing a role in initially fixing the foam protective film body (13). At this time, with the upward movement of the first elastic spring (5) driven by the concave plate (3), finally, the opposite sides of the upper plate (11) and the lower plate (14) will contact the top and bottom of the foam protective film body (13) respectively, thus completing the secondary fixation of the foam protective film body (13). S2: When the hollow connecting cylinder (6) moves upward, it will cause the threaded collar (7) to move upward. At this time, due to the elastic force of the second elastic spring (10), the cutting mechanism (9) will move upward. At this time, the outer cutting block (901) and the inner cutting block (902) will contact the bottom of the foam protective film body (13), so that the cooperation between the outer cutting block (901) and the bottom of the first cutting opening (25) realizes the first stamping of the foam protective film body (13) to obtain small pieces of the foam protective film body (13). When the top of the quarter arc groove (904) contacts the top of the inner cavity of the first cutting opening (25), the outer cutting block (901) is blocked. At the same time, the threaded collar (7) continues to move upward, and the second elastic spring (10) continues to be compressed. When the inner cavity of the threaded collar (7) cooperates with the threaded protrusion block (803), the connecting rod (801) will drive the convex block (802) to rotate, so that the convex block (802) rotates from the quarter arc groove (904) into the vertical groove (903). At this time, when the hollow connecting cylinder (6) continues to move upward, the cooperation between the inner cutting block (902) and the inner cavity of the second cutting opening (26) realizes the secondary stamping of the small pieces of the foam protective film body (13). At this time, because the area of the foam protective film body (13) is small, the small pieces of the foam protective film body (13) will not easily wrinkle, thus improving the cutting quality of the device for the foam protective film body (13). S3: When the top of the inner cutting block (902) passes through the second cutting opening (26), the foam protective film body (13) that has been cut is obtained at this time. At this time, the foam protective film body (13) will be sent into the interior of the collection block (21) by the inner cutting block (902). At this time, both the foam protective film body (13) and the inner cutting block (902) will come into contact with the bottommost arc block (24). When the inner cutting block (902) moves downward, the cut foam protective film body (13) will come into contact with the arc block (24), thereby realizing the collection of the cut foam protective film body (13). When the next cut foam protective film body (13) is conveyed into the interior of the collection block (21), at this time, the cut foam protective film body (13) above will be pushed by the cut foam protective film body (13) below to the space between the upper arc blocks (24) and come into contact with the arc blocks (24), thereby realizing the collection of the foam protective film body (13) that has been cut multiple times.

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