A film winding device for mobile phone middle frame processing protection

Abstract

This utility model discloses a film wrapping device for mobile phone mid-frame processing protection with low operational error rate and high work efficiency. It includes a film feeding assembly, a material-carrying wrapping assembly, and a film cutting assembly. The film feeding assembly includes at least a tray. The material-carrying wrapping assembly includes a turntable and a rotary drive for driving the turntable to rotate. The turntable has a first station, a second station, and a slitting area. When the turntable rotates, the film material crosses over the products at the first and second stations and wraps around and covers the side of the product ring. The film cutting assembly is located beside the turntable and includes a first telescopic drive, a second telescopic drive that drives the first telescopic drive to move closer to or away from the turntable, two pressure blocks that press the film material one-to-one against the side of the products at the first and second stations when it is close to the turntable, a cutter for cutting the film material in the slitting area, and two rollers for rolling the film material cut in the slitting area onto the end face of the product. The pressure blocks are elastically connected to the telescopic end of the first telescopic drive through springs.

Description

Technical Field

[0001] This utility model relates to the field of mobile phone component processing technology, and in particular to a wrapping device for protecting the processing of mobile phone mid-frames. Background Technology

[0002] During the manufacturing process of mobile phone components, a protective film is often wrapped around the surface of the phone's mid-frame to provide "three-way protection": protection against scratches, impacts, and contamination, thus preventing damage or contamination to the mid-frame. Currently, the industry primarily involves workers cutting and wrapping the film according to the outer dimensions of the mid-frame, leaving an edge allowance. The film is typically 5-10mm larger than the actual size of the mid-frame to ensure it wraps around its edges. The wrapping process involves first tearing off a corner of the film, aligning it with the edge of the mid-frame, and using electrostatic adsorption for initial fixation. Then, it is slowly unfolded from one edge (such as the top or side of the mid-frame) to avoid misalignment caused by tearing the entire sheet at once. Next, the film is gently pressed to remove air bubbles, aligning the reserved film allowance with the starting position, and finally cutting off the excess film. In this wrapping process, manual cutting and wrapping may scratch the mid-frame, resulting in product defects. Furthermore, when using manual wrapping, the manual operation time for a single product is about 2 minutes, resulting in low work efficiency, a high error rate, a rework rate of about 5-10%, and significant waste of film material, which in turn increases the cost of wrapping the mobile phone frame. Utility Model Content

[0003] Therefore, it is necessary to address the above-mentioned shortcomings by providing a film wrapping device for protecting the mid-frame of mobile phones that has a low error rate and high work efficiency.

[0004] A film wrapping device for protecting the mid-frame of a mobile phone during processing, comprising:

[0005] A membrane material feeding assembly includes at least a tray for carrying the wound membrane material and capable of rotating in a horizontal plane;

[0006] The material-carrying wrapping assembly includes a turntable located next to a tray and a rotary drive unit located below the turntable and driving the turntable to rotate. The upper surface of the turntable has a first station and a second station arranged side by side and spaced apart for fixing product fixtures. A slitting operation area is formed between the first station and the second station. When the turntable rotates, the film material crosses over the product on the product fixture at the first station and the second station, and the film material wraps around and covers the annular side of the product.

[0007] The film cutting assembly, located beside the turntable, includes a first telescopic drive member, a second telescopic drive member for driving the first telescopic drive member closer to or away from the turntable, two pressure blocks opposite to the telescopic end of the first telescopic drive member that press the film material one-to-one against the side of the product at the first and second work stations when approaching the turntable, a cutter located between the two pressure blocks and fixedly connected to the telescopic end of the first telescopic drive member that cuts the film material in the slitting area when approaching the turntable, and two rollers correspondingly arranged between the cutter and each pressure block and fixedly connected to the telescopic end of the first telescopic drive member to roll the film material cut in the slitting area onto the end face of the product; the pressure blocks are elastically connected to the telescopic end of the first telescopic drive member by springs and can slide relative to the telescopic end of the first telescopic drive member along the moving direction of the first telescopic drive member; the distance from the cutter to the turntable is less than the distance from the rollers to the turntable, and when the spring is naturally extended, the distance from the pressure block to the turntable is less than the distance from the cutter to the turntable.

[0008] In one embodiment, the wrapping device further includes a cabinet and a control panel. The cabinet is equipped with a controller and a power module. The controller is electrically connected to a rotary drive, a first telescopic drive, a second telescopic drive, the power module, and the control panel. The tray, the rotary drive, and the second telescopic drive are all located above the cabinet and connected to the cabinet. The control panel is fixed to the upper surface of the cabinet by a first mounting bracket.

[0009] In one embodiment, the membrane material feeding assembly further includes a second mounting bracket fixed to the upper surface of the cabinet, a first connecting shaft mounted on the second mounting bracket and extending in a vertical direction, the tray mounted on the first connecting shaft and rotatable relative to the second mounting bracket in a horizontal plane, and the upper surface of the tray having a positioning boss for winding and setting the membrane material, and an annular support platform surrounding the positioning boss and used to support the membrane material.

[0010] In one embodiment, the film feeding assembly further includes a second connecting shaft mounted on a second mounting bracket and located on the first connecting shaft adjacent to the turntable side, a film-wrapping guide block mounted on the upper part of the second connecting shaft and adjustable in angle relative to the second mounting bracket in the horizontal plane, and a film-wrapping stop block located above the film-wrapping guide block and mounted on the second connecting shaft. The film-wrapping guide block is provided with a guide surface for supporting and guiding the film segment from the tray to the turntable, and the lower part of the film-wrapping guide block is provided with a film-wrapping stop plate corresponding to the lower edge of the guide surface. The film-wrapping stop block protrudes from the upper edge of the guide surface.

[0011] In one embodiment, the material-carrying wrapping assembly further includes a third mounting bracket fixed to the upper surface of the cabinet, and the rotary drive includes a motor and a cam divider fixed to the third mounting bracket. The output shaft of the motor is driven to be connected to the input shaft of the cam divider, and the output shaft of the cam divider extends vertically and is driven to be connected to the center of the turntable.

[0012] In one embodiment, the material-carrying film-wrapping assembly further includes a pneumatic slip ring fixed on a third mounting bracket and located below the center of the turntable. The upper surface of the product fixture is provided with a plurality of suction holes for adsorbing the product. The side or bottom surface of the product fixture is provided with an air guide port communicating with each of the suction holes. The air inlet of the pneumatic slip ring is used to communicate with an external air pressure device, and the air outlet of the pneumatic slip ring is connected to the air guide port through an air pipe.

[0013] In one embodiment, the upper surface of the turntable has guide holes extending through the lower surface of the turntable at the first and second workstations, respectively. The guide holes extend in the direction from the first workstation to the second workstation. The material-carrying film-wrapping assembly also includes two fixture fixing seats correspondingly disposed at the first and second workstations, and two cutter guide blocks disposed opposite to each other on both sides of the slitting operation area and whose positions on the upper surface of the turntable are adjustable. The upper surface of the fixture fixing seat is provided with a fixture mounting position for receiving the product fixture. The position of the fixture fixing seat at the first or second workstation is adjustable and fixedly connected to the turntable by screws passing through the guide holes. The line connecting the two cutter guide blocks is perpendicular to the line connecting the two fixture fixing seats. The cutter guide block includes at least a vertical block located in the slitting operation area and extending in a vertical direction. The side of the vertical block facing away from the slitting operation area is flush with the side of the product, and the vertical block has a film-cutting guide notch for the cutter to pass through and communicate with the slitting operation area.

[0014] In one embodiment, the film cutting assembly further includes a fourth mounting bracket fixed to the upper surface of the cabinet. The second telescopic drive includes a single-rod cylinder fixed to the top of the fourth mounting bracket, a connecting plate located between the single-rod cylinder and the turntable and fixedly connected to the piston rod of the single-rod cylinder, a mounting plate located above the connecting plate and fixedly connected to the connecting plate, two support plates opposite to each other on both sides of the single-rod cylinder and fixedly connected to the top of the fourth mounting bracket, and two slide rails fixed to the top of each support plate and extending along the telescopic direction of the piston rod of the single-rod cylinder. A slider that slides in cooperation with the two slide rails is fixed to the lower surface of the mounting plate. The first telescopic drive is fixed to the upper surface of the mounting plate.

[0015] In one embodiment, the first telescopic drive includes a slide cylinder fixed to the upper surface of the mounting plate and a connecting block fixedly connected to the output slider of the slide cylinder. The connecting block has a first mounting notch on the end face adjacent to the turntable and two second mounting notches arranged opposite to each other on both sides of the first mounting notch and located at the side edge of the connecting block. A cutter fixing block for mounting the cutter is fixed at the first mounting notch. Two rollers are correspondingly embedded in the two second mounting notches and rotate in cooperation with the connecting block. Two lugs corresponding to each pressure block are provided on two opposite sides of the connecting block. A pressure rod that slides through the lug is fixedly connected to one end of the pressure block adjacent to the slide cylinder. The spring is sleeved on the pressure rod, and the two ends of the spring are fixedly connected to the lug and the pressure block, respectively.

[0016] In one embodiment, the film cutting assembly further includes two buffers fixed one-to-one on the upper surface of each support plate away from the turntable, the movable end of the buffer corresponding to the end face of the mounting plate.

[0017] The present invention discloses a film-wrapping device for protecting the outer ring of a mobile phone frame. A rotary drive unit rotates a turntable, providing traction to the film material on the tray. This causes the film material to wrap around the product's outer ring side at the first and second workstations. A second telescopic drive unit moves a first telescopic drive unit, along with a pressure block, cutter, and rollers, closer to the turntable. The pressure block presses the film material firmly against the product's side. The first telescopic drive unit then moves the cutter and rollers closer to the turntable, causing the cutter to cut the film material in the slitting area. The rollers then roll the cut film material onto the product's end face. This achieves automatic film wrapping and cutting of the outer ring side of the mobile phone frame, replacing manual wrapping and cutting methods. This improves the efficiency of film wrapping, avoids product scratches and rework caused by improper operation when using manual methods, reduces the error rate of film wrapping, improves the yield of film wrapping, reduces film waste, and lowers the cost of film wrapping. Attached Figure Description

[0018] Figure 1 This is a schematic diagram of the wrapping device in one embodiment of the present invention;

[0019] Figure 2 This is a top view of the film-wrapping device in its first working state according to one embodiment of the present invention;

[0020] Figure 3 This is a top view of the wrapping device in its second state during operation, according to one embodiment of the present invention;

[0021] Figure 4 This is a top view of the wrapping device in a third state during operation, according to one embodiment of the present invention;

[0022] Figure 5This is a top view of the wrapping device in its fourth state during operation, according to one embodiment of the present invention.

[0023] Figure 6 This is a top view of the wrapping device in its fifth state during operation, according to one embodiment of the present invention;

[0024] Figure 7 This is a schematic diagram of the structure of the membrane material feeding assembly in one embodiment of the present invention;

[0025] Figure 8 This is an exploded view of the membrane material feeding assembly in one embodiment of the present invention;

[0026] Figure 9 This is a schematic diagram of the structure of the material-carrying film-wrapping assembly in one embodiment of the present invention;

[0027] Figure 10 This is an exploded view of the material-carrying film-wrapping assembly in one embodiment of the present invention;

[0028] Figure 11 This is a schematic diagram of the structure of the film cutting assembly in one embodiment of the present invention;

[0029] Figure 12 This is an exploded structural diagram of the film-cutting assembly in one embodiment of the present invention. Detailed Implementation

[0030] To make the above-mentioned objects, features, and advantages of this utility model more apparent and understandable, the specific embodiments of this utility model will be described in detail below with reference to the accompanying drawings. Many specific details are set forth in the following description to provide a full understanding of this utility model. However, this utility model can be implemented in many other ways different from those described herein, and those skilled in the art can make similar modifications without departing from the spirit of this utility model. Therefore, this utility model is not limited to the specific embodiments disclosed below.

[0031] Please see Figure 1 This utility model discloses a film wrapping device for processing and protecting mobile phone mid-frames with low operational error rate and high work efficiency. The film wrapping device includes a film feeding component 100, a material-carrying film wrapping component 200, and a film cutting component 300. The material-carrying film wrapping component 200 is used to receive the product to be wrapped (i.e., the mobile phone mid-frame) and provide driving force for wrapping the product. The film feeding component 100 is used to supply film to the product on the material-carrying film wrapping component 200. The film cutting component 300 is used to cut the film when it is wrapped around the side of the product and press the cut part of the film tightly against the end face of the product so that the film is wrapped around the entire side of the product to ensure the integrity of the wrapping.

[0032] For specific details, please refer to... Figure 1 as well as Figure 7-12 The film feeding assembly 100 includes at least a tray 110 for carrying the wound film material and rotatable in a horizontal plane. The film material is wound on the tray 110 to form a film roll. The innermost layer of the film roll has a fixed end that is fixedly connected to the tray 110, and the outermost layer of the film roll has a stretching end that releases the film material under the traction of the film-wrapping assembly 200. Since the tray 110 can rotate in a horizontal plane, when the stretching end of the film roll is subjected to traction, the entire film roll rotates with the tray 110 under the action of traction. The film material constituting the film roll is released from the tray 110 layer by layer from the outermost layer to the innermost layer, thus realizing the unwinding of the film roll and continuously providing raw materials for the film wrapping operation of the mobile phone frame. The material-carrying film-wrapping assembly 200 includes a turntable 210 located beside a tray 110 and a rotary drive 220 located below the turntable 210 and driving the turntable 210 to rotate. The upper surface of the turntable 210 has a first station 211 and a second station 212 arranged side by side at intervals for fixing product fixtures. A slitting area 213 is formed between the first station 211 and the second station 212. That is, when the product is being wrapped, it is fixed on the turntable 210 by the product fixture to achieve the positioning of the product on the turntable 210. When the turntable 210 rotates, the film material spans the product on the product fixture at the first station 211 and the second station 212, and the film material wraps around and covers the circumferential side of the product. In other words, the two products set at the first station 211 and the second station 212 together form a whole, and when the turntable 210 rotates, the film material wraps around the outer circumferential side of this whole. The slitting area 213 is used to provide a suspended area and a cutting area for the film material during wrapping, so that the film material has a certain length allowance after cutting, so as to be attached to the end face of the product (i.e. the side of the product located in the slitting area 213) to achieve full wrapping of the product's circumferential side.

[0033] The film cutting assembly 300 is located beside the turntable 210. The film cutting assembly 300 includes a first telescopic drive member 310, a second telescopic drive member 320 for driving the first telescopic drive member 310 to move closer to or away from the turntable 210, two pressure blocks 330 oppositely arranged at the telescopic ends of the first telescopic drive member 310 and pressing the film material one-to-one against the product side at the first station 211 and the second station 212 when it approaches the turntable 210, and a cutter 340 located between the two pressure blocks 330 and fixedly connected to the telescopic ends of the first telescopic drive member 310 and cutting the film material in the slitting area 213 when it approaches the turntable 210. Two rollers 350 are fixedly connected between the cutter 340 and each pressure block 330 and to the telescopic end of the first telescopic drive member 310 to roll the film material cut by the slitting operation area 213 onto the end face of the product; the pressure block 330 is elastically connected to the telescopic end of the first telescopic drive member 310 through a spring 360 and can slide relative to the telescopic end of the first telescopic drive member 310 along the moving direction of the first telescopic drive member 310; the distance from the cutter 340 to the turntable 210 is less than the distance from the roller 350 to the turntable 210, and when the spring 360 naturally extends, the distance from the pressure block 330 to the turntable 210 is less than the distance from the cutter 340 to the turntable 210. Thus, when the second telescopic drive 320 drives the first telescopic drive 310 to approach the turntable 210, the pressure block 330 installed at the telescopic end of the first telescopic drive 310 first presses the film material on the two product sides on both sides of the slitting operation area 213 against the product sides, thereby positioning the two ends of the film material segment at the slitting operation area 213 and preventing the film material from being misaligned when the cutter 340 cuts the film material. This allows for further control of the first telescopic drive 310's movement, thereby using the cutter 340 to cut the film material at the slitting operation area 213, and using the roller 350 to roll the cut film material to the product end face. The spring 360 provides the possibility for the extension of the telescopic end of the first telescopic drive 310 when the pressure block 330 presses against the side of the product. That is, when the pressure block 330 presses against the side of the product, as the telescopic end of the first telescopic drive 310 extends, the cutter 340 and the roller 350 move closer to the turntable 210. During this process, the spring 360 is compressed by the joint pressure of the telescopic end of the first telescopic drive 310 and the pressure block 330. Under the combined action of the spring 360 and the side of the product, the pressure block 330 slides towards the telescopic end of the first telescopic drive 310, so as to ensure the normal operation of film cutting and pressing while continuously positioning the two ends of the film segment at the slitting operation area 213.

[0034] Please combine Figure 1-6In the operation of the film wrapping device, the product fixture holding the product is first fixed at the first station 211 and the second station 212, with one product to be wrapped at each station. The stretched end of the film roll is manually pulled to the product (designated as the first product) near the tray 110 beforehand, and the stretched end is pressed against the end face of the product located in the slitting area 213. Then, the rotary drive 220 is activated, causing the turntable 210 and the product on it to rotate. Since the stretched end of the film is fixed to the side of the product, the rotation of the turntable 210 provides traction force to the film, causing it to unwind and wrap around the side of the product. When the turntable 210 rotates 180°, another product (designated as the second product) rotates to the side near the tray 110, the positions of the first station 211 and the second station 212 in the horizontal plane are interchanged, and the film crosses the other side of the slitting area 213 and wraps around the other side of the first product. At this time, the second telescopic drive 320 drives the first telescopic drive 310 closer to the turntable 210 until the pressure block 330 presses the film material on the same side of the two products onto the sides of the two products, thereby positioning the two ends of the film material segment at the slitting operation area 213. Subsequently, the telescopic end of the first telescopic drive 310 extends, and the cutter 340 and roller 350, driven by the telescopic end of the first telescopic drive 310, further approach the products on the turntable 210. During this process, the spring 360 is compressed, and the pressure block 330 slides towards the telescopic end of the first telescopic drive 310 under the combined action of the product side and the telescopic end of the first telescopic drive 310. As the cutter 340 and roller 350 approach the product, the cutter 340 cuts the film material at the slitting area 213. The cutter 340 and roller 350 enter the slitting area 213, and the roller 350 moves within the slitting area 213 under the drive of the telescopic end of the first telescopic drive member 310, rolling the cut film material onto the end face of the product. Thus, by adjusting the initial film-coating length on the first product, the width of the slitting area 213 (the dimension of the slitting area 213 along the direction from the first station 211 to the second station 212), and the cutting position of the cutter 340 on the film material at the slitting area 213, full film wrapping of the first product's circumferential side can be achieved, separating the film material wrapped on the first product from the film roll, while simultaneously fixing the stretched end of the remaining film roll to the end face of the second product. Repeating the above film wrapping operation, i.e., wrapping the second product, and so on, achieves automatic film wrapping of the product.

[0035] The aforementioned film-wrapping device for protecting the mid-frame of mobile phones rotates the turntable 210 via a rotary drive 220, providing traction force to the film material on the tray 110. This causes the film material to wrap around the side of the product ring at the first station 211 and the second station 212. A second telescopic drive 320 moves the first telescopic drive 310, along with the pressure block 330, cutter 340, and roller 350, closer to the turntable 210. This causes the pressure block 330 to press the film material firmly against the side of the product. Furthermore, the first telescopic drive 310 drives the cutter 340 and roller 350... Roller 350 approaches turntable 210, causing cutter 340 to cut the film material in slitting area 213. Roller 350 then rolls the cut film material onto the end face of the product, realizing automatic film wrapping and cutting on the outer ring side of the mobile phone frame. This replaces manual film wrapping and cutting, improving the efficiency of product wrapping. It avoids product scratches and rework caused by improper operation when using manual operation, reducing the error rate of product wrapping, which is conducive to improving the product wrapping yield, reducing film waste and lowering product wrapping cost.

[0036] In one embodiment, the wrapping device further includes a cabinet 400 and a control panel 500. The cabinet 400 houses a controller and a power module. The controller is electrically connected to the rotary drive 220, the first telescopic drive 310, the second telescopic drive 320, the power module, and the control panel 500 to control the operation of each electrical component. The controller can be a PLC controller, a microcontroller, or a control circuit board. The power module supplies power to the entire wrapping device. A vacuum pump 410, supplying air to each pneumatic component of the wrapping device, is also provided inside or outside the cabinet 400. This vacuum pump 410 is connected to the air chamber of each pneumatic component via multiple air pipes. Each air pipe is equipped with a solenoid valve electrically connected to the controller. Each solenoid valve is started and stopped under the drive of the controller to control the opening and closing of the air pipe containing the solenoid valve, thereby controlling the operation of the corresponding pneumatic component and achieving independent control of each pneumatic component by the controller. The bottom of the cabinet 400 is equipped with support legs 420 to raise the height of the bottom of the cabinet 400, preventing water from the factory from entering the cabinet 400 through the bottom and preventing electrical leakage accidents. The tray 110, the rotary drive component 220, and the second telescopic drive component 320 are all located above the cabinet 400 and connected to the cabinet 400. The control panel 500 is fixed to the upper surface of the cabinet 400 by the first mounting bracket 510. In other words, the film feeding assembly 100, the film-carrying and wrapping assembly 200, the film-cutting assembly 300, and the control panel 500 are all installed on the upper surface of the cabinet 400. In this embodiment, the control panel 500 is a touch screen display. In other embodiments, the control panel 500 may also consist of a display screen and controls connected to the display screen. The wrapping device also includes a display housing 520. The first mounting bracket 510 is a column or flange tube. The display housing 520 is fixed to the top of the first mounting bracket 510 by screws. A display opening is opened on one side of the display housing 520. The control panel 500 is housed in the inner cavity of the display housing 520, and the display surface of the control panel 500 corresponds to the display opening of the display housing 520. In this embodiment, the control panel 500 is used to adjust the dwell time (or delay time) of the first station 211 and the second station 212 at the position adjacent to the tray 110, and to coordinate the sequence of actions such as film material conveying, turntable 210 rotation, and film material cutting. It can also establish parameter configuration files for different products to quickly switch and adapt to the wrapping operations of different products.

[0037] The membrane material feeding assembly 100 also includes a second mounting bracket 120 fixed to the upper surface of the cabinet 400, a first connecting shaft 130 mounted on the second mounting bracket 120 and extending vertically, a tray 110 mounted on the first connecting shaft 130 and rotatable relative to the second mounting bracket 120 in the horizontal plane, and the upper surface of the tray 110 having a positioning boss 111 for winding and setting the membrane material, and an annular support platform 112 surrounding the positioning boss 111 and used to support the membrane material. The second mounting bracket 120 includes two first support uprights 121 arranged opposite each other and extending vertically, a first horizontal plate 122 located between the two first support uprights 121 and fixedly connected to the middle of the two first support uprights 121, and a second horizontal plate 123 fixedly connected to the top of the two first support uprights 121. Weight reduction holes are provided on both the first support uprights 121 and the first horizontal plate 122. In one embodiment, a first connecting shaft 130 passes through the upper and lower surfaces of a second horizontal plate 123 and rotatably engages with the second horizontal plate 123. A tray 110 is fixed to the upper part of the first connecting shaft 130. A retaining spring 124 is provided on the lower surface of the second horizontal plate 123 to engage with the first connecting shaft 130 and limit its axial displacement (i.e., vertical displacement). This retaining spring 124 is used to prevent the first connecting shaft 130 from moving up and down. A first bearing 125 is provided at the rotatable engagement point between the first connecting shaft 130 and the second horizontal plate 123 to reduce the difficulty of rotating the first connecting shaft 130. A stepped hole is provided on the second horizontal plate 123, passing through its upper and lower surfaces. This stepped hole forms a groove on the upper surface of the second horizontal plate 123, and the first bearing 125 can be fixed in this groove by a round-headed hexagonal screw. In another embodiment, the first connecting shaft 130 is fixedly connected to the second horizontal plate 123, and the tray 110 is rotatably sleeved on the upper part of the first connecting shaft 130. In both embodiments described above, a height-adjustable retaining ring 140 is provided below the tray 110 on the first connecting shaft 130. This retaining ring 140 is fixed to the first connecting shaft 130 by screws. When the tray 110 is fixed to the first connecting shaft 130, another retaining ring 140 connected to the first connecting shaft 130 is also fixed above the tray 110. The two retaining rings 140 together fix and restrict the tray 110 to the first connecting shaft 130. When the tray 110 is rotatably mounted on the first connecting shaft 130, it is only necessary to slip the tray 110 onto the first connecting shaft 130, and the axial installation height of the tray 110 is limited by the retaining ring 140 below the tray 110. Thus, by adjusting the height of the retaining ring 140 on the first connecting shaft 130, the height of the tray 110 on the first connecting shaft 130 can be adjusted, thereby adjusting the film feeding height.

[0038] Furthermore, the film feeding assembly 100 also includes a second connecting shaft 150 mounted on the second mounting bracket 120 and located on the first connecting shaft 130 adjacent to the turntable 210, a wrapping guide block 160 mounted on the upper part of the second connecting shaft 150 and adjustable in angle relative to the second mounting bracket 120 in the horizontal plane, and a wrapping stop block 170 located above the wrapping guide block 160 and mounted on the second connecting shaft 150. The wrapping guide block 160 is provided with a guide surface for supporting and guiding the film segment from the tray 110 to the turntable 210. The lower part of the wrapping guide block 160 is provided with a wrapping baffle 180 corresponding to the lower edge of the guide surface. The wrapping stop block 170 protrudes from the upper edge of the guide surface. Similarly, in this embodiment, the second connecting shaft 150 can be rotatably mounted on the second horizontal plate 123 (the rotatable connection between the second connecting shaft 150 and the second horizontal plate 123 is the same as the rotatable connection between the first connecting shaft 130 and the second horizontal plate 123), and the wrapping guide block 160 and the wrapping stop block 170 can be fixed on the second connecting shaft 150, and the wrapping stop plate 180 can be fixed on the wrapping guide block 160; alternatively, the second connecting shaft 150 can be fixed on the second horizontal plate 123, and the wrapping guide block 160 can be rotatably mounted on the second connecting shaft 150, so that the wrapping stop plate 180 and the wrapping stop block 170 are both fixed on the wrapping guide block 160. Preferably, in this embodiment, the second connecting shaft 150 is rotatably mounted on the second horizontal plate 123. The wrapping guide block 160 and the wrapping stop block 170 are fixed to the second connecting shaft 150, and the wrapping stop block 180 is fixed to the wrapping guide block 160. When the second connecting shaft 150 rotates and the angle of the wrapping guide block 160 is adjusted to a preset angle, the radial rotation of the second connecting shaft 150 can be limited by a screw that passes through the side of the second horizontal plate 123 and is inserted into the second connecting shaft 150, thereby limiting the angle of the wrapping guide block 160. By setting the wrapping guide block 160, the movement path of the film material from the tray 110 into the product on the turntable 210 can be guided. At the same time, by rotating the second connecting shaft 150 to adjust the angle of the wrapping guide block 160, the wrapping tension can be adjusted to prevent the film material from being too tight or too loose during the wrapping process. In this way, the problem of excessive stretching or poor adhesion caused by the difficulty in controlling the wrapping tension during manual wrapping can be avoided, thus ensuring the wrapping effect.

[0039] In addition, in this embodiment, a second bearing 190 is provided between the wrapping guide block 160 and the wrapping stop block 170, and is sleeved on the second connecting shaft 150. The second bearing 190 is used to guide the film material when it enters the guide surface. The wrapping stop block 170 and the wrapping baffle 180 together restrict the upper and lower edges of the film material to prevent the film material from deviating during feeding. Furthermore, in this embodiment, a limit ring is fixed to the lower surface of the wrapping guide block 160. The height of the wrapping guide block 160 and the limit ring on the second connecting shaft 150 is adjustable. Thus, by adjusting the height of the limit ring on the second connecting shaft 150, the height of the wrapping guide block 160 on the second connecting shaft 150 can be adjusted so that the height of the film material on the tray 110 and the height at the guide surface are consistent, thereby preventing the film material from deviating.

[0040] The material-carrying wrapping assembly 200 also includes a third mounting bracket 230 fixed to the upper surface of the cabinet 400. The rotary drive 220 includes a motor 221 and a cam divider 222 fixed to the third mounting bracket 230. The output shaft of the motor 221 is drivenly connected to the input shaft of the cam divider 222, and the output shaft of the cam divider 222 extends vertically and is drivenly connected to the center of the turntable 210. The third mounting bracket 230 includes a base plate 231 fixed to the upper surface of the cabinet 400, two second support uprights 232 oppositely arranged and fixedly connected to the upper surface of the base plate 231, and a third horizontal plate 233 fixedly connected to the top of the two second support uprights 232. The motor 221 and the cam divider 222 are both mounted on the upper surface of the third horizontal plate 233. An operating table 234 is also provided on one side of the third horizontal plate 233. The operating table 234 contains a control module for controlling the operation of the motor 221 and the cam divider 222, and the operating table 234 is equipped with controls for sending specified commands to the control module. In addition, in this embodiment, a belt drive structure 223 is provided between the output shaft of the motor 221 and the input shaft of the cam divider 222. The belt drive structure 223 includes a driving pulley connected to the output shaft of the motor 221, a driven pulley connected to the input shaft of the cam divider 222, a conveyor belt spanning between the driving pulley and the driven pulley, and a protective cover covering the driving pulley, the driven pulley, and the conveyor belt. By providing the belt drive structure 223, the impact of the vibration of the motor 221 on the cam divider 222 can be reduced, thereby protecting the cam divider 222 and achieving overload protection for the motor 221 and the cam divider 222. By setting a cam divider 222 at the output end of motor 221 to control the rotation of turntable 210, the cam divider 222 can convert the continuous rotational motion of motor 221 into precise intermittent indexing motion of turntable 210. Specifically, the cam curve inside the cam divider 222 drives the needle roller bearing inside the cam divider 222, so that the output shaft of the cam divider 222 can perform precise indexing rotation at specific angles (such as 90°, 120°, 180°, etc.) and maintain rigid locking in the stationary position. In this embodiment, by adjusting the working parameters of motor 221 and selecting a suitable model of cam divider 222, turntable 210 can enter the stationary position every 180° rotation (i.e., the indexing angle of cam divider 222 is 180°), and the film material is cut and pressed during the stationary time when the cam divider 222 enters the stationary position to ensure the smooth progress of product wrapping operation. The cam divider 222 can be any commercially available cam divider 222 that meets the requirement that the turntable 210 stops once every 180° rotation. The structure and working principle of the cam divider 222 are common knowledge in the industry and will not be described in detail here.

[0041] Furthermore, the material-carrying film-wrapping assembly 200 also includes a pneumatic slip ring 240 fixed on the third mounting bracket 230 and located below the center of the turntable 210. The upper surface of the product fixture has several suction holes for adsorbing the product, and the side or bottom surface of the product fixture has air guide ports communicating with each suction hole. The air inlet of the pneumatic slip ring 240 is used to communicate with an external air pressure device, and the air outlet of the pneumatic slip ring 240 is connected to the air guide port via an air pipe. In this embodiment, the air inlet of the pneumatic slip ring 240 is located at the stator end of the pneumatic slip ring 240, and the air outlet of the pneumatic slip ring 240 is located at the rotor end (or rotating end) of the pneumatic slip ring 240 and rotates with the turntable 210. This way, while supplying air to the air guide ports and suction holes of the product fixture through the pneumatic slip ring 240, it can prevent the air pipe from getting tangled when the turntable 210 rotates. In addition, in this embodiment, the pneumatic slip ring 240 is mounted on the base plate 231 via a flexible coupling 250. By setting the flexible coupling 250, vibration isolation between the turntable 210 and the external pneumatic device can be achieved, thereby avoiding the impact on the external pneumatic device during the rotation of the turntable 210 and reducing the requirements for installation accuracy. By opening suction holes and air guide ports on the product fixture, the product can be fixed on the product fixture by negative pressure adsorption, thereby reducing the difficulty of product installation.

[0042] In one embodiment, the upper surface of the turntable 210 is provided with guide holes penetrating the lower surface of the turntable 210 at the first station 211 and the second station 212, respectively. The guide holes extend in the direction from the first station 211 to the second station 212. The material-carrying film-wrapping assembly 200 also includes two fixture fixing seats 260 that are correspondingly arranged at the first station 211 and the second station 212, and two cutter guide blocks 270 that are arranged opposite to each other on both sides of the slitting operation area 213 and whose positions on the upper surface of the turntable 210 are adjustable. The upper surface of the fixture fixing seat 260 is provided with a fixture mounting position for receiving the product fixture. The position of the fixture fixing seat 260 at the first station 211 or the second station 212 is adjustable and fixedly connected to the turntable 210 by screws passing through the guide holes. Thus, by adjusting the positions of the two fixture fixing seats 260 at the first work station 211 or the second work station 212, the length of the slitting operation area 213 along the direction from the first work station to the second work station 212 can be adjusted to accommodate the film wrapping requirements of mobile phone frames of different widths. The length of the slitting operation area 213 along the direction from the first work station to the second work station 212 is greater than or equal to the width of the product to be wrapped, ensuring that the product's circumferential side can be fully wrapped. The product fixture can be snapped and fixed onto the fixture fixing seat 260. In addition, in this embodiment, the turntable 210 is also provided with several through holes to reduce the weight of the turntable 210 and reduce the load on the motor 221. The line connecting the two cutter guide blocks 270 is perpendicular to the line connecting the two fixture fixing seats 260. Each cutter guide block 270 includes at least a vertical block located within the slitting area 213 and extending vertically. The side of the vertical block facing away from the slitting area 213 is flush with the side of the product, and a film-cutting guide notch 271 is provided on the vertical block for the cutter 340 to pass through and communicate with the slitting area 213. By providing the cutter guide block 270, it is convenient to position the center of the film material within the slitting area 213 during film cutting, and it also guides the cutter 340. Furthermore, the material-carrying film-wrapping assembly 200 also includes a mounting block 280. The turntable 210 has a first strip-shaped adjustment hole parallel to the guide hole. The mounting block 280 is located at the first adjustment hole and is fixed to the turntable 210 by a screw passing through the first strip-shaped adjustment hole. The mounting block 280 has a second strip-shaped adjustment hole perpendicular to the first strip-shaped adjustment hole. The cutter guide block 270 also includes a horizontal block fixed to the bottom end of the vertical block. The horizontal block is fixed to the mounting block 280 by a screw passing through the second strip-shaped adjustment hole. Thus, by adjusting the position of the mounting block 280 at the first strip-shaped adjustment hole and the position of the horizontal block at the second strip-shaped adjustment hole, the position of the cutter guide block 270 in the horizontal plane can be finely adjusted to adapt to different film-cutting positions of the cutter 340.

[0043] The film cutting assembly 300 also includes a fourth mounting bracket 370 fixed to the upper surface of the cabinet 400. The second telescopic drive component 320 includes a single-rod cylinder 321 fixed to the top of the fourth mounting bracket 370, a connecting plate 322 located between the single-rod cylinder 321 and the turntable 210 and fixedly connected to the piston rod of the single-rod cylinder 321, a mounting plate 323 located above the connecting plate 322 and fixedly connected to the connecting plate 322, two support plates 324 arranged opposite to each other on both sides of the single-rod cylinder 321 and fixedly connected to the top of the fourth mounting bracket 370, and two slide rails 325 fixed to the top of each support plate 324 and extending along the telescopic direction of the piston rod of the single-rod cylinder 321. A slider 326 that slides with the two slide rails 325 is fixed to the lower surface of the mounting plate 323. The first telescopic drive component 310 is fixed to the upper surface of the mounting plate 323. By setting up the support plate 324 and the slide rail 325, on the one hand, the mounting plate 323 and the first telescopic drive member 310 are supported, thereby reducing the load on the single-rod cylinder 321 and preventing the piston rod of the single-rod cylinder 321 from breaking due to overload. On the other hand, the cooperation between the slide rail 325 and the slider 326 limits the sliding path of the mounting plate 323, thereby preventing positional deviation of the first telescopic drive member 310 during movement and improving the reliability of the positional movement of the first telescopic drive member 310. Preferably, the first telescopic drive member 310 is fixed to the mounting plate 323 with screws.

[0044] The first telescopic drive component 310 includes a slide cylinder 311 fixed to the upper surface of the mounting plate 323, and a connecting block 312 fixedly connected to the output slider 326 of the slide cylinder 311. The end face of the connecting block 312 adjacent to the turntable 210 is provided with a first mounting notch 313 and two second mounting notches 314 arranged opposite to each other on both sides of the first mounting notch 313 and located at the side edge of the connecting block 312. A cutter fixing block 315 for mounting a cutter 340 is fixed at the first mounting notch 313. The cutter fixing block 315 is fixed at the first mounting notch 313 by screws. Two rollers 350 are correspondingly embedded in the two second mounting notches 314 and rotate in cooperation with the connecting block 312. The rollers 350 are mounted at the second mounting notches 314 through a rotating shaft. The rollers 350 roll the cut film material to the end face of the product on the one hand, and on the other hand, the rollers 350 are also used to correct the deviation of the film material to ensure that the film material is always aligned with the side of the mobile phone frame during the conveying process. In this embodiment, both the pressure block 330 and the roller 350 are made of silicone material to reduce damage to the film material. The connecting block 312 has two lugs on opposite sides, each corresponding to one of the pressure blocks 330. A pressure rod with a sliding lug is fixedly connected to one end of the pressure block 330 near the slide cylinder 311. A spring 360 is sleeved on the pressure rod, and both ends of the spring 360 are fixedly connected to the lug and the pressure block 330 respectively, allowing the pressure block 330 to slide relative to the lug during film cutting. This ensures that while positioning both ends of the film material in the slitting area 213, the film cutting operation can proceed smoothly. In this embodiment, both the first and second telescopic drive components are connected to the vacuum pump 410 via independent air pipes.

[0045] In addition, the film cutting assembly 300 also includes two buffers 380, each fixed to the upper surface of the support plate 324 at the end away from the turntable 210, with the movable end of the buffer 380 corresponding to the end face of the mounting plate 323. Preferably, the buffer 380 is a hydraulic buffer, and the movable end of the buffer 380 has an elastic head, which can be made of silicone or rubber material, to reduce the impact of the mounting plate 323 on the buffer 380. At the same time, the buffer 380 limits the maximum sliding distance of the mounting plate 323 on the slide rail 325, preventing the mounting plate 323 and the first telescopic drive member 310 from falling off the slide rail 325.

[0046] The film wrapping device in this solution ensures consistency in film tension, wrapping angle, and fit, reducing rework or scrap due to human error and improving product qualification rate. Compared with manual operation, the film wrapping speed is faster, which can significantly increase production capacity. The dual-station design enables seamless connection of the production process, saves labor costs, and one machine can replace 3-5 workers, saving wages, training and management costs in the long term. It also accurately calculates the amount of film used, reducing material waste.

[0047] The technical features of the above embodiments can be combined in any way. For the sake of brevity, not all possible combinations of the technical features in the above embodiments are described. However, as long as there is no contradiction in the combination of these technical features, they should be considered to be within the scope of this specification.

[0048] The embodiments described above are merely illustrative of several implementations of this utility model, and while the descriptions are relatively specific and detailed, they should not be construed as limiting the scope of the utility model patent. It should be noted that those skilled in the art can make various modifications and improvements without departing from the concept of this utility model, and these all fall within the protection scope of this utility model. Therefore, the protection scope of this utility model patent should be determined by the appended claims.

Claims

1. A film wrapping device for protecting the mid-frame of a mobile phone, characterized in that, include: A membrane material feeding assembly includes at least a tray for carrying the wound membrane material and capable of rotating in a horizontal plane; The material-carrying wrapping assembly includes a turntable located next to a tray and a rotary drive unit located below the turntable and driving the turntable to rotate. The upper surface of the turntable has a first station and a second station arranged side by side and spaced apart for fixing product fixtures. A slitting operation area is formed between the first station and the second station. When the turntable rotates, the film material crosses over the product on the product fixture at the first station and the second station, and the film material wraps around and covers the annular side of the product. The film cutting assembly, located beside the turntable, includes a first telescopic drive member, a second telescopic drive member for driving the first telescopic drive member closer to or away from the turntable, two pressure blocks opposite to the telescopic end of the first telescopic drive member that press the film material one-to-one against the side of the product at the first and second work stations when it approaches the turntable, a cutter located between the two pressure blocks and fixedly connected to the telescopic end of the first telescopic drive member that cuts the film material in the slitting area when it approaches the turntable, and two rollers corresponding to the cutter and each pressure block and fixedly connected to the telescopic end of the first telescopic drive member to roll the film material cut in the slitting area onto the end face of the product; the pressure blocks are elastically connected to the telescopic end of the first telescopic drive member by springs and can slide relative to the telescopic end of the first telescopic drive member along the moving direction of the first telescopic drive member; The distance from the cutter to the turntable is less than the distance from the roller to the turntable. When the spring naturally extends, the distance from the pressure block to the turntable is less than the distance from the cutter to the turntable.

2. The film wrapping device according to claim 1, characterized in that, The wrapping device also includes a cabinet and a control panel. The cabinet is equipped with a controller and a power module. The controller is electrically connected to the rotary drive, the first telescopic drive, the second telescopic drive, the power module, and the control panel. The tray, the rotary drive, and the second telescopic drive are all located above the cabinet and connected to the cabinet. The control panel is fixed to the upper surface of the cabinet by a first mounting bracket.

3. The film wrapping device according to claim 2, characterized in that, The membrane material feeding assembly also includes a second mounting bracket fixed to the upper surface of the cabinet, a first connecting shaft mounted on the second mounting bracket and extending in the vertical direction, the tray mounted on the first connecting shaft and rotatable relative to the second mounting bracket in the horizontal plane, and the upper surface of the tray having a positioning boss for winding and setting the membrane material, and an annular support platform surrounding the positioning boss and used to support the membrane material.

4. The film wrapping device according to claim 3, characterized in that, The film feeding assembly further includes a second connecting shaft mounted on a second mounting bracket and located on the first connecting shaft adjacent to the turntable, a film-wrapping guide block mounted on the upper part of the second connecting shaft and adjustable in angle relative to the second mounting bracket in the horizontal plane, and a film-wrapping stop block located above the film-wrapping guide block and mounted on the second connecting shaft. The film-wrapping guide block is provided with a guide surface for supporting and guiding the film segment from the tray to the turntable. The lower part of the film-wrapping guide block is provided with a film-wrapping stop plate corresponding to the lower edge of the guide surface, and the film-wrapping stop block protrudes from the upper edge of the guide surface.

5. The wrapping device according to claim 2, characterized in that, The material-carrying film-wrapping assembly also includes a third mounting bracket fixed to the upper surface of the cabinet. The rotary drive includes a motor and a cam divider fixed to the third mounting bracket. The output shaft of the motor is driven to connect with the input shaft of the cam divider. The output shaft of the cam divider extends vertically and is driven to connect with the center of the turntable.

6. The wrapping device according to claim 5, characterized in that, The material-carrying film-wrapping assembly also includes a pneumatic slip ring fixed on the third mounting bracket and located below the center of the turntable. The upper surface of the product fixture is provided with a plurality of suction holes for adsorbing the product. The side or bottom surface of the product fixture is provided with an air guide port communicating with each of the suction holes. The air inlet of the pneumatic slip ring is used to communicate with an external air pressure device, and the air outlet of the pneumatic slip ring is connected to the air guide port through an air pipe.

7. The film wrapping device according to claim 1, characterized in that, The upper surface of the turntable has guide holes extending through the lower surface of the turntable at the first and second workstations, respectively. The guide holes extend in the direction from the first workstation to the second workstation. The material-carrying film-wrapping assembly also includes two fixture fixing seats correspondingly arranged at the first and second workstations, and two cutter guide blocks arranged opposite to each other on both sides of the slitting operation area and whose positions on the upper surface of the turntable are adjustable. The upper surface of the fixture fixing seat has a fixture mounting position for receiving the product fixture. The position of the fixture fixing seat at the first or second workstation is adjustable and fixedly connected to the turntable by screws passing through the guide holes. The line connecting the two cutter guide blocks is perpendicular to the line connecting the two fixture fixing seats. The cutter guide block includes at least a vertical block located in the slitting operation area and extending in the vertical direction. The side of the vertical block facing away from the slitting operation area is flush with the side of the product, and the vertical block has a film-cutting guide notch for the cutter to pass through and communicate with the slitting operation area.

8. The film wrapping device according to claim 2, characterized in that, The film cutting assembly also includes a fourth mounting bracket fixed to the upper surface of the cabinet. The second telescopic drive component includes a single-rod cylinder fixed to the top of the fourth mounting bracket, a connecting plate located between the single-rod cylinder and the turntable and fixedly connected to the piston rod of the single-rod cylinder, a mounting plate located above the connecting plate and fixedly connected to the connecting plate, two support plates arranged opposite to each other on both sides of the single-rod cylinder and fixedly connected to the top of the fourth mounting bracket, and two slide rails fixed to the top of each support plate and extending along the telescopic direction of the piston rod of the single-rod cylinder. A slider that slides in cooperation with the two slide rails is fixed to the lower surface of the mounting plate. The first telescopic drive component is fixed to the upper surface of the mounting plate.

9. The film-wrapping device according to claim 8, characterized in that, The first telescopic drive component includes a slide cylinder fixed to the upper surface of the mounting plate and a connecting block fixedly connected to the output slider of the slide cylinder. The connecting block has a first mounting notch on the end face adjacent to the turntable and two second mounting notches arranged opposite to each other on both sides of the first mounting notch and located at the side edge of the connecting block. A cutter fixing block for mounting the cutter is fixed at the first mounting notch. Two rollers are correspondingly embedded in the two second mounting notches and rotate in cooperation with the connecting block. Two lugs corresponding to each pressure block are provided on two opposite sides of the connecting block. A pressure rod that slides through the lug is fixedly connected to one end of the pressure block adjacent to the slide cylinder. The spring is sleeved on the pressure rod, and the two ends of the spring are fixedly connected to the lug and the pressure block, respectively.

10. The film-wrapping device according to claim 8, characterized in that, The film cutting assembly also includes two buffers that are fixed one-to-one on the upper surface of each support plate away from the turntable, and the movable end of the buffer corresponds to the end face of the mounting plate.

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