An automatic film wrapping machine for the middle frame of a mobile phone

Abstract

The present invention discloses an automatic film wrapping machine for a mobile phone middle frame, which relates to the technical field and includes a placement tray and a middle frame member placed on the placement tray. A battery cell to be film wrapped is integrally provided on the middle frame member. Above the placement tray, there is a film pressing member, which includes a hot pressing ring for pressing the film body and an auxiliary pressing strip. One end of the auxiliary pressing strip is inserted and arranged below the hot pressing ring and the film body. The film pressing member also includes a cutter for trimming the film body. By pulling the auxiliary pressing strip, the film body wrapped around the outside of the battery cell is torn off, improving the convenience of film tearing. During the film wrapping process, the deformed auxiliary pressing strip serves as an exhaust channel for discharging the gas inside the film wrapping, preventing the film body from expanding and rupturing due to excessive air inside the film during the film wrapping process, resulting in the failure of film wrapping, and also avoiding excessive air inside the film wrapping, which is likely to cause the failure of the hot pressing part during transportation and lead to the film body falling off.

Description

Technical Field

[0001] The present invention relates to the technical field of cell core film wrapping, and particularly relates to an automatic film wrapping machine for the middle frame of a mobile phone. Background Art

[0002] The integrated middle frame of the battery cell of the mobile phone combines the battery cell with the middle frame of the mobile phone, reducing the later assembly procedures. The integrated design enables the middle frame of the mobile phone to protect the battery cell before assembly.

[0003] Before the overall assembly, a film needs to be pasted on the surface of the battery cell to cover the sensitive part of the battery cell. It can be covered with a protective material to prevent static electricity or external force damage, and it can also prevent scratches on the cell core part before assembly. When the later mobile phone components need to be assembled, the protective film is torn off and then assembled again.

[0004] During the film pasting process, the film body is imprinted on the middle frame outside the cell core by means of hot pressing. During the process of pressing and wrapping the film downwards, the film body is pressed and covered on the outside of the cell core in an expanding manner, resulting in air between the film and the cell core. And the overall covering type film pressing causes the air between the film and the cell core to not be discharged. When there is too much air in the film during the film wrapping process, it will cause the film body to expand and rupture, resulting in the failure of film wrapping. When the air inside causes the film body to expand, it is easy to cause the failure of the hot pressing part during the transportation of the middle frame of the mobile phone, resulting in the film body falling off. Summary of the Invention

[0005] The purpose of the present invention is to provide an automatic film wrapping machine for the middle frame of a mobile phone, which has an auxiliary pressing strip that deforms during the film wrapping process as an exhaust channel for discharging the gas inside the film wrapping, preventing the film body from expanding and rupturing due to too much air in the film during the film wrapping process, resulting in the failure of film wrapping, and also avoiding the failure of the hot pressing part caused by the extrusion of too much air inside the film wrapping during the transportation process, resulting in the film body falling off.

[0006] To achieve the above purpose, the present invention provides the following technical solution: an automatic film wrapping machine for the middle frame of a mobile phone, including a placement tray and a middle frame part placed on the placement tray. A battery cell to be film wrapped is integrally provided on the middle frame part. Above the placement tray, there is a film pressing part. The film pressing part includes a hot pressing ring for pressing the film body, and an auxiliary pressing strip. One end of the auxiliary pressing strip is inserted and arranged below the hot pressing ring and the film body. The film pressing part also includes a cutter for trimming the film body. The hot pressing ring presses down to press the film body on the middle frame part and wraps the film body outside the battery cell. Above the auxiliary pressing strip, there is also a pressing rod for assisting the deformation of the auxiliary pressing strip;

[0007] The hot pressing ring is used to press the film body on the outside of the battery cell, and a covering space is formed between the film body and the battery cell. One end of the auxiliary pressing strip is pressed in the covering space between the film body and the middle frame member. While the hot pressing ring presses downwards, the pressing rod squeezes the auxiliary pressing strip into a U shape to form an arc-shaped channel, and the arc-shaped channel serves as an exhaust channel for the covering space to communicate with the external space.

[0008] Further, the film pressing member further includes a conical pressing platform. The hot pressing ring is arranged below the conical pressing platform, the cutter is arranged on the conical pressing platform, the upper part of the conical pressing platform is connected to the output end of the driver, and the driver drives the conical pressing platform to press downwards.

[0009] Further, a rotating member is installed on the conical pressing platform. The rotating member is connected to the cutter, and the rotating member can drive the cutter to rotate to cut the film body after hot pressing.

[0010] Further, the cutter is obliquely arranged, and the inclination angle of the cutter matches the inclined surface of the conical pressing platform.

[0011] Further, an auxiliary rod is arranged at the side end of the conical pressing platform. A plurality of placing plates are annularly arranged on the outer wall of the auxiliary rod, and a placing groove is formed on each placing plate, and an auxiliary pressing strip is placed in the placing groove.

[0012] Further, an auxiliary pressing strip is arranged in each placing groove, and the pressing rod is arranged in the placing groove and above the auxiliary pressing strip.

[0013] Further, an extrusion groove is formed on the outer wall of the auxiliary rod. One end of the placing plate is arranged in the extrusion groove through a bent plate, and the lower part of the bent plate is butted against the inner plate in the extrusion groove through a spring.

[0014] Further, an extrusion ring is connected to the outer wall of the auxiliary rod through a bearing. The extrusion ring is connected to the output end of the driver through a connecting rod. An inner pressing plate is arranged on the inner wall of the extrusion ring. A moving groove is formed on the outer wall of the bearing, and the inner pressing plate is arranged in the moving groove. The upper end of the auxiliary rod is connected to the motor. When the auxiliary rod rotates, the extrusion grooves on its surface are aligned with the moving groove in turn. When one of the extrusion grooves is aligned with the moving groove, the inner pressing plate moves downwards in the moving groove and the extrusion groove to squeeze the bent plate in the extrusion groove.

[0015] Further, a first pressing plate and a second pressing plate are respectively hinged and installed on the placing plate. The two ends of the first pressing plate are respectively an a end and a b end, and the two ends of the second pressing plate are a c end and a d end. The a end of the first pressing plate contacts the upper end surface of the pressing rod. The b end of the first pressing plate is arranged above the c end of the second pressing plate. An outer pressing plate is arranged on the outer wall of the extrusion ring and above the d end of the second pressing plate.

[0016] Furthermore, the battery cells of the middle frame are base paper made of nano-scale cellulose, carbon nanotubes are embedded in the base paper, and the outer side of the base paper is covered with a layer of solidified charged polystyrene plastic solution.

[0017] Technical effects and advantages of the present invention:

[0018] 1. The pressure rod of the present invention squeezes the auxiliary pressure strip into a U shape to form an arcuate channel, and the arcuate channel is used as an exhaust channel for the wrapped space to communicate with the external space. The auxiliary pressure strip is deformed into a U shape, and one end of the U-shape of the auxiliary pressure strip is arranged under the film body. When the film is pressed, the U-shaped film body is used to press and exhaust at the same time. During the film pressing process, the auxiliary pressure strip serves as an exhaust structure. When the film pressing is completed, the auxiliary pressure strip can also be used as an auxiliary tearing strip. By pulling the auxiliary pressure strip, the film body wrapped on the outside of the battery cell is torn off, thereby improving the convenience of film tearing. During the film wrapping process, the deformed auxiliary pressure strip is used as an exhaust channel for exhausting the gas inside the film wrapping, so as to prevent the film body from expanding and rupturing due to excessive air in the film during the film wrapping process, thereby preventing the film body from failing due to expansion and rupture, thereby preventing the film from failing. It also avoids excessive air inside the film, which may cause failure of the hot pressing part due to extrusion during transportation, thereby causing the film body to fall off.

[0019] 2. In the present invention, while the end b of the first pressure plate is lifted, the end a of the first pressure plate is pressed down, and then the pressure rod is squeezed to drive the auxiliary pressure strip to deform. This embodiment utilizes the power of the film pressing member pressing down to achieve the auxiliary pressure strip alignment, and can also drive the pressure rod to press down to deform the auxiliary pressure strip, thereby reducing the driving cost. The auxiliary pressure strip alignment is achieved by utilizing the power of the film pressing member pressing down, and the downward pressure of a single placement plate does not affect the discharge of other placement plates, thereby improving the convenience of discharge. Without affecting the discharge of materials, a single placement plate can be driven downward without restriction to align the auxiliary pressure strip. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] Figure 1 It is a schematic diagram of the overall structure of the present invention;

[0021] Figure 2 It is a schematic diagram of the separation structure of the film pressing part and the middle frame part of the present invention;

[0022] Figure 3 It is a bottom view of the structure of the die pressing member of the present invention;

[0023] Figure 4 This is a schematic diagram of the undeformed structure of the auxiliary layering strip of the present invention;

[0024] Figure 5 It is a schematic diagram of the deformation structure of the auxiliary pressure strip of the present invention;

[0025] Figure 6 This is a schematic diagram of the overall structure of Embodiment 2 of the present invention;

[0026] Figure 7Schematic diagram of the film pressing member and the placement plate according to the second embodiment of the present invention;

[0027] Figure 8 Schematic diagram of the placement plate structure of the present invention;

[0028] Figure 9 Half-sectional view of the auxiliary rod structure of the present invention;

[0029] Figure 10 For the present invention Figure 9 Enlarged view of part A;

[0030] Figure 11 For the present invention Figure 9 Enlarged view of part B.

[0031] In the figure:

[0032] 1. Placement tray; 2. Middle frame member; 21. Battery cell; 3. Film pressing member; 31. Hot pressing ring; 32. Auxiliary pressing strip; 321. Pressing rod; 33. Tool; 34. Conical pressing table; 341. Rotating member; 35. Driver; 5. Auxiliary rod; 51. Placement plate; 511. Placement groove; 512. Bent plate; 513. First pressing plate; 514. Second pressing plate; 52. Extrusion groove; 53. Extrusion ring; 531. Inner pressing plate; 532. Outer pressing plate. Detailed implementation manners

[0033] 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.

[0034] To better understand an automatic film wrapping machine for a mobile phone middle frame provided in this embodiment, the following first briefly introduces the existing film wrapping equipment. During the process of wrapping the battery cell with a film, the existing film wrapping equipment directly presses the film to expand the film body and wrap it around the outside of the battery cell. After the film wrapping is completed, it is necessary to perform secondary patching on the outside of the film body and stick the auxiliary patch on the wrapped film. When the mobile phone middle frame with the battery cell needs to be assembled, the wrapped film needs to be torn off. At this time, the wrapped film is torn off by pulling the auxiliary patch. However, the above method does not consider the extrusion problem that may occur during the subsequent transportation and storage of the mobile phone middle frame before assembly, and separating the film pressing and strip sticking processes increases the processing complexity. The specification aims to solve the above technical problems. The embodiment of the present application provides an automatic film wrapping machine for a mobile phone middle frame. By deforming the auxiliary pressing strip 32 while wrapping the film, the deformed auxiliary pressing strip 32 serves as an exhaust channel during the film wrapping process to discharge the gas inside the wrapped film, preventing the film body from expanding and rupturing due to excessive air inside the film during the film wrapping process, resulting in the failure of film wrapping, and also avoiding excessive air inside the wrapped film, which easily causes the failure of the hot pressing part during transportation and extrusion, resulting in the film body falling off.

[0035] Embodiment 1: Refer to Figure 1 - Figure 5 , which is the first embodiment of the present invention, provides an automatic film wrapping machine for a mobile phone middle frame, including a placement tray 1 and a middle frame part 2 placed on the placement tray 1. A battery cell 21 to be wrapped is integrally provided on the middle frame part 2. A film pressing part 3 is arranged above the placement tray 1. The film pressing part 3 includes a hot pressing ring 31 for pressing the film body, and an auxiliary pressing strip 32. One end of the auxiliary pressing strip 32 is inserted and arranged below the hot pressing ring 31 and the film body. The film pressing part 3 further includes a cutter 33 for trimming the film body. The hot pressing ring 31 presses down to press the film body on the middle frame part 2 and wrap the film body around the outside of the battery cell 21. Above the auxiliary pressing strip 32, there is also a pressing rod 321 for deforming the auxiliary pressing strip 32;

[0036] The hot pressing ring 31 is used to press the film body on the outside of the battery cell 21, and a wrapping space is formed between the film body and the battery cell 21. One end of the auxiliary pressing strip 32 is pressed in the wrapping space between the film body and the middle frame part 2. While the hot pressing ring 31 presses down, the pressing rod 321 squeezes the auxiliary pressing strip 32 into a U shape to form an arc-shaped channel. The arc-shaped channel serves as an exhaust channel for the wrapping space to communicate with the outside space. By deforming the auxiliary pressing strip 32 into a U shape, and one end of the U-shaped auxiliary pressing strip 32 is arranged below the film body. When pressing the film, the U-shaped film body is used for exhausting air while pressing. During the film pressing process, the auxiliary pressing strip 32 serves as an exhaust structure. After the film pressing is completed, the auxiliary pressing strip 32 can also serve as an auxiliary tearing strip, and the film body wrapped around the outside of the battery cell 21 can be torn off by pulling the auxiliary pressing strip 32, improving the convenience of film tearing.

[0037] The film pressing member 3 further includes a conical pressing table 34. The hot pressing ring 31 is arranged below the conical pressing table 34. The cutter 33 is arranged on the conical pressing table 34. The upper part of the conical pressing table 34 is connected to the output end of the driver 35. The cutter 33 is arranged obliquely, and the inclination angle of the cutter 33 matches the inclined surface of the conical pressing table 34. The driver 35 drives the conical pressing table 34 to press down. The conical pressing table 34 presses down the film body. The hot pressing ring 31 is arranged below the conical pressing table 34. When the hot pressing ring 31 presses the film body on the outer side of the battery cell 21, the hot pressing ring 31 starts to heat up to hot press the film body into the middle frame member 2. The cutting end of the cutter 33 is arranged at the edge of the large round table of the conical pressing table 34. When the hot pressing ring 31 presses the film body onto the middle frame member 2, the conical pressing table 34 presses the film body into an inverted cone shape, so that the deformed film body fits the edge of the large round table of the conical pressing table 34, so that the cutting end of the cutter 33 contacts the film body. At this time, the cutter 33 rotates to cut off the film at the edge of the round table, so that the hot-pressed film body is covered inside the middle frame member 2. When the film pressing member 3 moves upward, the pressed film body will not be pulled away.

[0038] A rotating member 341 is installed on the conical pressing table 34. The rotating member 341 is connected to the cutter 33. The rotating member 341 can drive the cutter 33 to rotate to cut the hot-pressed film body. The rotating member 341 includes an annular plate connected to the cutter 33 and a power assembly for driving the annular plate to rotate. The rotation of the annular plate drives the cutter 33 to rotate to cut and trim the film body.

[0039] A plate body for placing the auxiliary pressing strip 32 is arranged at the side end of the conical pressing table 34. A groove for accommodating the auxiliary pressing strip 32 is formed on the plate body, and a driving member for driving the pressing rod 321 to press down is arranged on the plate body. By pressing down the pressing rod 321, the auxiliary pressing strip 32 is extruded and deformed. It should be noted that the groove is semi-circular. The auxiliary pressing strip 32 is placed above the groove. When being extruded by the pressing rod 321, the auxiliary pressing strip 32 is pressed into the groove. Limited by the shape of the semi-circular groove, the auxiliary pressing strip 32 undergoes adaptive deformation in the groove, so as to realize the deformation of the auxiliary pressing strip 32 into a U shape. In this embodiment, the auxiliary pressing strip 32 is deformed while the film is being wrapped. During the film wrapping process, the deformed auxiliary pressing strip 32 serves as an exhaust channel for exhausting the gas inside the wrapped film, preventing the film body from expanding and bursting due to too much air inside the film during the film wrapping process, resulting in the failure of the film wrapping, and also avoiding too much air inside the wrapped film, which is easy to cause the failure of the hot pressing part during the transportation process and cause the film body to fall off.

[0040] Embodiment Two: Refer to Figure 6 - Figure 11, which is the second embodiment of the present invention. The difference between this embodiment and the first embodiment is that an auxiliary rod 5 is provided at the side end of the conical pressing table 34. A number of placing plates 51 are annularly arranged on the outer wall of the auxiliary rod 5. A placing groove 511 is formed on each placing plate 51. It should be noted that a semi-circular pressing groove is also formed below the placing groove 511 for adapting to the deformation shape of the auxiliary pressing strip 32. An auxiliary pressing strip 32 is arranged in each placing groove 511. The pressing rod 321 is arranged in the placing groove 511 and above the auxiliary pressing strip 32. An extrusion groove 52 is formed on the outer wall of the auxiliary rod 5. One end of the placing plate 51 is arranged in the extrusion groove 52 through a bent plate 512, and the lower part of the bent plate 512 is connected to the inner plate of the extrusion groove 52 through a spring. The outer wall of the auxiliary rod 5 is connected with an extrusion ring 53 through a bearing. The extrusion ring 53 is connected to the output end of the driver 35 through a connecting rod. An inner pressing plate 531 is arranged on the inner wall of the extrusion ring 53. A moving groove is formed on the outer wall of the bearing. The inner pressing plate 531 is arranged in the moving groove. The upper end of the auxiliary rod 5 is connected to a motor. When the auxiliary rod 5 rotates, the extrusion groove 52 on its surface is aligned with the moving groove in sequence. When one of the extrusion grooves 52 is aligned with the moving groove, the inner pressing plate 531 moves down in the moving groove and the extrusion groove 52 to squeeze the bent plate 512 in the extrusion groove 52. The extrusion ring 53 follows and presses down together with the pressing film member 3. The extrusion ring 53 drives the auxiliary rod 5 to press down. Each placing plate 51 can... When the auxiliary rod 5 is limited by the frame member 2 and cannot continue to press down, the extrusion ring 53 continues to press down following the pressing film member 3. The extrusion ring 53 drives the placing plate 51 below the pressing film member 3 to press down, so that one end of the auxiliary pressing strip 32 on the placing plate 51 is arranged above the battery cell 21, realizing the alignment of the auxiliary pressing strip 32 by using the power of the pressing down of the pressing film member 3. And the pressing down of a single placing plate 51 does not affect the feeding of other placing plates 51, improving the convenience of feeding. Without affecting the feeding, the single placing plate 51 can be driven to press down without limitation to align the auxiliary pressing strip 32.

[0041] Specifically, the inner pressing plate 531 of the extrusion ring 53 moves down in the moving groove, thereby driving the bent plate 512 to move down and driving a single placing plate 51 to move down.

[0042] The first pressing plate 513 and the second pressing plate 514 are hingedly installed on the placing plate 51, the two ends of the first pressing plate 513 are end a and end b respectively, the two ends of the second pressing plate 514 are end c and end d, the end a of the first pressing plate 513 contacts the upper end surface of the pressing rod 321, the end b of the first pressing plate 513 is arranged above the end c of the second pressing plate 514, the outer wall of the extrusion ring 53 is provided with an outer pressing plate 532, and the outer pressing plate 532 is arranged above the end d of the second pressing plate 514. When the extrusion ring 53 moves downward, the outer pressing plate 532 presses down on the first pressing plate 513. The d end of the second pressure plate 514 is squeezed, the d end of the second pressure plate 514 moves downward, and the c end is lifted. While the c end of the second pressure plate 514 is lifted, the b end of the first pressure plate 513 is lifted, and while the b end of the first pressure plate 513 is lifted, the a end of the first pressure plate 513 is pressed downward, and then the pressure rod 321 is squeezed to drive the auxiliary pressure strip 32 to deform. This embodiment utilizes the power of the pressing film 3 to press down, and at the same time, it can also drive the pressure rod 321 to press down to deform the auxiliary pressure strip 32, thereby reducing the driving cost.

[0043] Embodiment 3: This is the third embodiment of the present invention. This embodiment is different from the second embodiment in that the battery cell 21 of the middle frame 2 can be a base paper made of nano-cellulose, carbon nanotubes are embedded in the base paper, and a layer of solidified charged polystyrene plastic solution is covered on the outside of the base paper. The base paper can act as a battery. It should be noted that the battery cell 21 can be a coil layer for wireless charging of the battery. The automatic coating machine is used to coat the surface of the battery cell 21 to protect the battery cell 21.

[0044] Finally, it should be noted that the above is only a preferred embodiment of the present invention and is not intended to limit the present invention. Although the present invention has been described in detail with reference to the aforementioned embodiments, it is still possible for those skilled in the art to modify the technical solutions described in the aforementioned embodiments or to make equivalent substitutions for some of the technical features therein. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of the present invention should be included in the protection scope of the present invention.

Claims

1. An automatic film coating machine for a mobile phone middle frame, comprising a placement tray (1) and a middle frame member (2) placed on the placement tray (1), wherein a battery cell (21) to be coated is integrally arranged on the middle frame member (2), characterized in that: A film pressing member (3) is arranged above the placement plate (1), the film pressing member (3) comprising a heat pressing ring (31) for pressing the film body, and an auxiliary pressing strip (32), one end of the auxiliary pressing strip (32) being inserted and arranged below the heat pressing ring (31) and the film body, the film pressing member (3) also comprising a tool (33) for trimming the film body, the heat pressing ring (31) pressing down to press the film body onto the middle frame member (2), and wrapping the film body onto the outside of the battery cell (21), and a pressure rod (321) for deforming the auxiliary pressing strip (32) is also arranged above the auxiliary pressing strip (32); The heat pressing ring (31) is used to press the membrane body onto the outside of the battery cell (21), so that a wrapping space is formed between the membrane body and the battery cell (21); one end of the auxiliary pressure strip (32) is pressed into the wrapping space between the membrane body and the middle frame member (2); while the heat pressing ring (31) is pressed downward, the pressure rod (321) squeezes the auxiliary pressure strip (32) into a U shape to form an arc-shaped channel, and the arc-shaped channel is used as an exhaust channel for the wrapping space to communicate with the external space.

2. According to claim 1, the automatic film coating machine for mobile phone middle frame is characterized in that: The film pressing member (3) further comprises a conical pressing platform (34), a hot pressing ring (31) is arranged below the conical pressing platform (34), a tool (33) is arranged on the conical pressing platform (34), and the top of the conical pressing platform (34) is connected to the output end of a driver (35), and the driver (35) drives the conical pressing platform (34) to press downward.

3. The mobile phone middle frame automatic film coating machine according to claim 2, characterized in that: A rotating member (341) is installed on the conical pressing platform (34); the rotating member (341) is connected to the cutter (33); the rotating member (341) can drive the cutter (33) to rotate, thereby cutting the film body after heat pressing.

4. The mobile phone middle frame automatic film coating machine according to claim 3, characterized in that: The tool (33) is arranged in an oblique shape, and the inclination angle of the tool (33) matches the inclined surface of the conical pressing platform (34).

5. The mobile phone middle frame automatic film coating machine according to claim 4, characterized in that: An auxiliary rod (5) is provided at the side end of the conical pressing platform (34), and a plurality of placement plates (51) are provided in a circular array on the outer wall of the auxiliary rod (5). Each placement plate (51) is provided with a placement groove (511), and an auxiliary pressure strip (32) is placed in the placement groove (511).

6. The mobile phone middle frame automatic film coating machine according to claim 5, characterized in that: The placement grooves (511) are each provided with an auxiliary pressure strip (32), and the pressure rod (321) is provided in the placement grooves (511) and is located above the auxiliary pressure strip (32).

7. The mobile phone middle frame automatic film coating machine according to claim 6, characterized in that: An extrusion groove (52) is provided on the outer wall of the auxiliary rod (5), one end of the placement plate (51) is arranged in the extrusion groove (52) via a bent plate (512), and the lower part of the bent plate (512) is butted against the inner plate of the extrusion groove (52) via a spring.

8. The mobile phone middle frame automatic film coating machine according to claim 7, characterized in that: The outer wall of the auxiliary rod (5) is connected to an extrusion ring (53) via a bearing, the extrusion ring (53) is connected to the output end of the driver (35) via a connecting rod, the inner wall of the extrusion ring (53) is provided with an inner pressure plate (531), the outer wall of the bearing is provided with a movable groove, the inner pressure plate (531) is arranged in the movable groove, the upper end of the auxiliary rod (5) is connected to the motor, when the auxiliary rod (5) rotates, the extrusion grooves (52) on its surface are aligned with the movable grooves in sequence, when one of the extrusion grooves (52) is aligned with the movable groove, the inner pressure plate (531) moves downward in the movable groove and the extrusion groove (52) to extrude the bent plate (512) in the extrusion groove (52).

9. The mobile phone middle frame automatic film coating machine according to claim 8, characterized in that: The placement plate (51) is hingedly mounted with a first pressing plate (513) and a second pressing plate (514), respectively; the two ends of the first pressing plate (513) are end a and end b, respectively; the two ends of the second pressing plate (514) are end c and end d; the end a of the first pressing plate (513) is in contact with the upper end surface of the pressing rod (321); the end b of the first pressing plate (513) is arranged above the end c of the second pressing plate (514); an outer pressing plate (532) is arranged on the outer wall of the extrusion ring (53); and the outer pressing plate (532) is arranged above the end d of the second pressing plate (514).

10. The mobile phone middle frame automatic film coating machine according to claim 9, characterized in that: The battery cell (21) of the middle frame (2) is a base paper made of nano-scale cellulose, carbon nanotubes are embedded in the base paper, and the outer side of the base paper is covered with a layer of solidified charged polystyrene plastic solution.

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